| 1 | /* |
| 2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License, version 2 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | */ |
| 17 | |
| 18 | #define _LGPL_SOURCE |
| 19 | #include <assert.h> |
| 20 | #include <popt.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <unistd.h> |
| 26 | #include <inttypes.h> |
| 27 | #include <ctype.h> |
| 28 | |
| 29 | #include <common/sessiond-comm/sessiond-comm.h> |
| 30 | #include <common/compat/string.h> |
| 31 | #include <common/compat/getenv.h> |
| 32 | #include <common/string-utils/string-utils.h> |
| 33 | #include <common/utils.h> |
| 34 | |
| 35 | #include <lttng/constant.h> |
| 36 | /* Mi dependancy */ |
| 37 | #include <common/mi-lttng.h> |
| 38 | |
| 39 | #include "../command.h" |
| 40 | |
| 41 | #if (LTTNG_SYMBOL_NAME_LEN == 256) |
| 42 | #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255" |
| 43 | #endif |
| 44 | |
| 45 | static char *opt_event_list; |
| 46 | static int opt_event_type; |
| 47 | static const char *opt_loglevel; |
| 48 | static int opt_loglevel_type; |
| 49 | static int opt_kernel; |
| 50 | static char *opt_session_name; |
| 51 | static int opt_userspace; |
| 52 | static int opt_jul; |
| 53 | static int opt_log4j; |
| 54 | static int opt_python; |
| 55 | static int opt_enable_all; |
| 56 | static char *opt_probe; |
| 57 | static char *opt_userspace_probe; |
| 58 | static char *opt_function; |
| 59 | static char *opt_channel_name; |
| 60 | static char *opt_filter; |
| 61 | static char *opt_exclude; |
| 62 | |
| 63 | #ifdef LTTNG_EMBED_HELP |
| 64 | static const char help_msg[] = |
| 65 | #include <lttng-enable-event.1.h> |
| 66 | ; |
| 67 | #endif |
| 68 | |
| 69 | enum { |
| 70 | OPT_HELP = 1, |
| 71 | OPT_TRACEPOINT, |
| 72 | OPT_PROBE, |
| 73 | OPT_USERSPACE_PROBE, |
| 74 | OPT_FUNCTION, |
| 75 | OPT_SYSCALL, |
| 76 | OPT_USERSPACE, |
| 77 | OPT_LOGLEVEL, |
| 78 | OPT_LOGLEVEL_ONLY, |
| 79 | OPT_LIST_OPTIONS, |
| 80 | OPT_FILTER, |
| 81 | OPT_EXCLUDE, |
| 82 | }; |
| 83 | |
| 84 | static struct lttng_handle *handle; |
| 85 | static struct mi_writer *writer; |
| 86 | |
| 87 | static struct poptOption long_options[] = { |
| 88 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ |
| 89 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, |
| 90 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
| 91 | {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0}, |
| 92 | {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0}, |
| 93 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
| 94 | {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, |
| 95 | {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0}, |
| 96 | {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0}, |
| 97 | {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0}, |
| 98 | {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0}, |
| 99 | {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0}, |
| 100 | {"userspace-probe",0, POPT_ARG_STRING, &opt_userspace_probe, OPT_USERSPACE_PROBE, 0, 0}, |
| 101 | {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0}, |
| 102 | {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0}, |
| 103 | {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0}, |
| 104 | {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0}, |
| 105 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
| 106 | {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0}, |
| 107 | {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0}, |
| 108 | {0, 0, 0, 0, 0, 0, 0} |
| 109 | }; |
| 110 | |
| 111 | /* |
| 112 | * Parse probe options. |
| 113 | */ |
| 114 | static int parse_probe_opts(struct lttng_event *ev, char *opt) |
| 115 | { |
| 116 | int ret = CMD_SUCCESS; |
| 117 | int match; |
| 118 | char s_hex[19]; |
| 119 | #define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */ |
| 120 | char name[LTTNG_SYMBOL_NAME_LEN]; |
| 121 | |
| 122 | if (opt == NULL) { |
| 123 | ret = CMD_ERROR; |
| 124 | goto end; |
| 125 | } |
| 126 | |
| 127 | /* Check for symbol+offset */ |
| 128 | match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API |
| 129 | "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", name, s_hex); |
| 130 | if (match == 2) { |
| 131 | strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN); |
| 132 | ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 133 | DBG("probe symbol %s", ev->attr.probe.symbol_name); |
| 134 | if (*s_hex == '\0') { |
| 135 | ERR("Invalid probe offset %s", s_hex); |
| 136 | ret = CMD_ERROR; |
| 137 | goto end; |
| 138 | } |
| 139 | ev->attr.probe.offset = strtoul(s_hex, NULL, 0); |
| 140 | DBG("probe offset %" PRIu64, ev->attr.probe.offset); |
| 141 | ev->attr.probe.addr = 0; |
| 142 | goto end; |
| 143 | } |
| 144 | |
| 145 | /* Check for symbol */ |
| 146 | if (isalpha(name[0])) { |
| 147 | match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s", |
| 148 | name); |
| 149 | if (match == 1) { |
| 150 | strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN); |
| 151 | ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 152 | DBG("probe symbol %s", ev->attr.probe.symbol_name); |
| 153 | ev->attr.probe.offset = 0; |
| 154 | DBG("probe offset %" PRIu64, ev->attr.probe.offset); |
| 155 | ev->attr.probe.addr = 0; |
| 156 | goto end; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | /* Check for address */ |
| 161 | match = sscanf(opt, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", s_hex); |
| 162 | if (match > 0) { |
| 163 | if (*s_hex == '\0') { |
| 164 | ERR("Invalid probe address %s", s_hex); |
| 165 | ret = CMD_ERROR; |
| 166 | goto end; |
| 167 | } |
| 168 | ev->attr.probe.addr = strtoul(s_hex, NULL, 0); |
| 169 | DBG("probe addr %" PRIu64, ev->attr.probe.addr); |
| 170 | ev->attr.probe.offset = 0; |
| 171 | memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN); |
| 172 | goto end; |
| 173 | } |
| 174 | |
| 175 | /* No match */ |
| 176 | ret = CMD_ERROR; |
| 177 | |
| 178 | end: |
| 179 | return ret; |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * Walk the directories in the PATH environment variable to find the target |
| 184 | * binary passed as parameter. |
| 185 | * |
| 186 | * On success, the full path of the binary is copied in binary_full_path out |
| 187 | * parameter. This buffer is allocated by the caller and must be at least |
| 188 | * LTTNG_PATH_MAX bytes long. |
| 189 | * On failure, returns -1; |
| 190 | */ |
| 191 | static int walk_command_search_path(const char *binary, char *binary_full_path) |
| 192 | { |
| 193 | char *tentative_binary_path = NULL; |
| 194 | char *command_search_path = NULL; |
| 195 | char *curr_search_dir_end = NULL; |
| 196 | char *curr_search_dir = NULL; |
| 197 | struct stat stat_output; |
| 198 | int ret = 0; |
| 199 | |
| 200 | command_search_path = lttng_secure_getenv("PATH"); |
| 201 | if (!command_search_path) { |
| 202 | ret = -1; |
| 203 | goto end; |
| 204 | } |
| 205 | |
| 206 | /* |
| 207 | * Duplicate the $PATH string as the char pointer returned by getenv() should |
| 208 | * not be modified. |
| 209 | */ |
| 210 | command_search_path = strdup(command_search_path); |
| 211 | if (!command_search_path) { |
| 212 | ret = -1; |
| 213 | goto end; |
| 214 | } |
| 215 | |
| 216 | /* |
| 217 | * This char array is used to concatenate path to binary to look for |
| 218 | * the binary. |
| 219 | */ |
| 220 | tentative_binary_path = zmalloc(LTTNG_PATH_MAX * sizeof(char)); |
| 221 | if (!tentative_binary_path) { |
| 222 | ret = -1; |
| 223 | goto alloc_error; |
| 224 | } |
| 225 | |
| 226 | curr_search_dir = command_search_path; |
| 227 | do { |
| 228 | /* |
| 229 | * Split on ':'. The return value of this call points to the |
| 230 | * matching character. |
| 231 | */ |
| 232 | curr_search_dir_end = strchr(curr_search_dir, ':'); |
| 233 | if (curr_search_dir_end != NULL) { |
| 234 | /* |
| 235 | * Add a NULL byte to the end of the first token so it |
| 236 | * can be used as a string. |
| 237 | */ |
| 238 | curr_search_dir_end[0] = '\0'; |
| 239 | } |
| 240 | |
| 241 | /* Empty the tentative path */ |
| 242 | memset(tentative_binary_path, 0, LTTNG_PATH_MAX * sizeof(char)); |
| 243 | |
| 244 | /* |
| 245 | * Build the tentative path to the binary using the current |
| 246 | * search directory and the name of the binary. |
| 247 | */ |
| 248 | ret = snprintf(tentative_binary_path, LTTNG_PATH_MAX, "%s/%s", |
| 249 | curr_search_dir, binary); |
| 250 | if (ret < 0) { |
| 251 | goto free_binary_path; |
| 252 | } |
| 253 | if (ret < LTTNG_PATH_MAX) { |
| 254 | /* |
| 255 | * Use STAT(2) to see if the file exists. |
| 256 | */ |
| 257 | ret = stat(tentative_binary_path, &stat_output); |
| 258 | if (ret == 0) { |
| 259 | /* |
| 260 | * Verify that it is a regular file or a |
| 261 | * symlink and not a special file (e.g. |
| 262 | * device). |
| 263 | */ |
| 264 | if (S_ISREG(stat_output.st_mode) |
| 265 | || S_ISLNK(stat_output.st_mode)) { |
| 266 | /* |
| 267 | * Found a match, set the out parameter |
| 268 | * and return success. |
| 269 | */ |
| 270 | ret = lttng_strncpy(binary_full_path, |
| 271 | tentative_binary_path, |
| 272 | LTTNG_PATH_MAX); |
| 273 | if (ret == -1) { |
| 274 | ERR("Source path does not fit " |
| 275 | "in destination buffer."); |
| 276 | } |
| 277 | goto free_binary_path; |
| 278 | } |
| 279 | } |
| 280 | } |
| 281 | /* Go to the next entry in the $PATH variable. */ |
| 282 | curr_search_dir = curr_search_dir_end + 1; |
| 283 | } while (curr_search_dir_end != NULL); |
| 284 | |
| 285 | free_binary_path: |
| 286 | free(tentative_binary_path); |
| 287 | alloc_error: |
| 288 | free(command_search_path); |
| 289 | end: |
| 290 | return ret; |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * Check if the symbol field passed by the user is in fact an address or an |
| 295 | * offset from a symbol. Those two instrumentation types are not supported yet. |
| 296 | * It's expected to be a common mistake because of the existing --probe option |
| 297 | * that does support these formats. |
| 298 | * |
| 299 | * Here are examples of these unsupported formats for the --userspace-probe |
| 300 | * option: |
| 301 | * elf:/path/to/binary:0x400430 |
| 302 | * elf:/path/to/binary:4194364 |
| 303 | * elf:/path/to/binary:my_symbol+0x323 |
| 304 | * elf:/path/to/binary:my_symbol+43 |
| 305 | */ |
| 306 | static int warn_userspace_probe_syntax(const char *symbol) |
| 307 | { |
| 308 | unsigned long addr = 0; |
| 309 | size_t offset = 0; |
| 310 | int ret; |
| 311 | |
| 312 | /* Check if the symbol field is an hex address. */ |
| 313 | ret = sscanf(symbol, "0x%lx", &addr); |
| 314 | if (ret > 0) { |
| 315 | /* If there is a match, print a warning and return an error. */ |
| 316 | ERR("Userspace probe on address not supported yet."); |
| 317 | ret = CMD_UNSUPPORTED; |
| 318 | goto error; |
| 319 | } |
| 320 | |
| 321 | /* Check if the symbol field is an decimal address. */ |
| 322 | ret = sscanf(symbol, "%lu", &addr); |
| 323 | if (ret > 0) { |
| 324 | /* If there is a match, print a warning and return an error. */ |
| 325 | ERR("Userspace probe on address not supported yet."); |
| 326 | ret = CMD_UNSUPPORTED; |
| 327 | goto error; |
| 328 | } |
| 329 | |
| 330 | /* Check if the symbol field is symbol+hex_offset. */ |
| 331 | ret = sscanf(symbol, "%*[^+]+0x%lx", &offset); |
| 332 | if (ret > 0) { |
| 333 | /* If there is a match, print a warning and return an error. */ |
| 334 | ERR("Userspace probe on symbol+offset not supported yet."); |
| 335 | ret = CMD_UNSUPPORTED; |
| 336 | goto error; |
| 337 | } |
| 338 | |
| 339 | /* Check if the symbol field is symbol+decimal_offset. */ |
| 340 | ret = sscanf(symbol, "%*[^+]+%lu", &offset); |
| 341 | if (ret > 0) { |
| 342 | /* If there is a match, print a warning and return an error. */ |
| 343 | ERR("Userspace probe on symbol+offset not supported yet."); |
| 344 | ret = CMD_UNSUPPORTED; |
| 345 | goto error; |
| 346 | } |
| 347 | |
| 348 | ret = 0; |
| 349 | |
| 350 | error: |
| 351 | return ret; |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * Parse userspace probe options |
| 356 | * Set the userspace probe fields in the lttng_event struct and set the |
| 357 | * target_path to the path to the binary. |
| 358 | */ |
| 359 | static int parse_userspace_probe_opts(struct lttng_event *ev, char *opt) |
| 360 | { |
| 361 | int ret = CMD_SUCCESS; |
| 362 | int num_token; |
| 363 | char **tokens; |
| 364 | char *target_path = NULL; |
| 365 | char *unescaped_target_path = NULL; |
| 366 | char *real_target_path = NULL; |
| 367 | char *symbol_name = NULL, *probe_name = NULL, *provider_name = NULL; |
| 368 | struct lttng_userspace_probe_location *probe_location = NULL; |
| 369 | struct lttng_userspace_probe_location_lookup_method *lookup_method = |
| 370 | NULL; |
| 371 | |
| 372 | if (opt == NULL) { |
| 373 | ret = CMD_ERROR; |
| 374 | goto end; |
| 375 | } |
| 376 | |
| 377 | switch (ev->type) { |
| 378 | case LTTNG_EVENT_USERSPACE_PROBE: |
| 379 | break; |
| 380 | default: |
| 381 | assert(0); |
| 382 | } |
| 383 | |
| 384 | /* |
| 385 | * userspace probe fields are separated by ':'. |
| 386 | */ |
| 387 | tokens = strutils_split(opt, ':', 1); |
| 388 | num_token = strutils_array_of_strings_len(tokens); |
| 389 | |
| 390 | /* |
| 391 | * Early sanity check that the number of parameter is between 2 and 4 |
| 392 | * inclusively. |
| 393 | * elf:PATH:SYMBOL |
| 394 | * std:PATH:PROVIDER_NAME:PROBE_NAME |
| 395 | * PATH:SYMBOL (same behavior as ELF) |
| 396 | */ |
| 397 | if (num_token < 2 || num_token > 4) { |
| 398 | ret = CMD_ERROR; |
| 399 | goto end_string; |
| 400 | } |
| 401 | |
| 402 | /* |
| 403 | * Looking up the first parameter will tell the technique to use to |
| 404 | * interpret the userspace probe/function description. |
| 405 | */ |
| 406 | switch (num_token) { |
| 407 | case 2: |
| 408 | /* When the probe type is omitted we assume ELF for now. */ |
| 409 | case 3: |
| 410 | if (num_token == 3 && strcmp(tokens[0], "elf") == 0) { |
| 411 | target_path = tokens[1]; |
| 412 | symbol_name = tokens[2]; |
| 413 | } else if (num_token == 2) { |
| 414 | target_path = tokens[0]; |
| 415 | symbol_name = tokens[1]; |
| 416 | } else { |
| 417 | ret = CMD_ERROR; |
| 418 | goto end_string; |
| 419 | } |
| 420 | lookup_method = |
| 421 | lttng_userspace_probe_location_lookup_method_function_elf_create(); |
| 422 | if (!lookup_method) { |
| 423 | WARN("Failed to create ELF lookup method"); |
| 424 | ret = CMD_ERROR; |
| 425 | goto end_string; |
| 426 | } |
| 427 | break; |
| 428 | case 4: |
| 429 | if (strcmp(tokens[0], "sdt") == 0) { |
| 430 | target_path = tokens[1]; |
| 431 | provider_name = tokens[2]; |
| 432 | probe_name = tokens[3]; |
| 433 | } else { |
| 434 | ret = CMD_ERROR; |
| 435 | goto end_string; |
| 436 | } |
| 437 | lookup_method = |
| 438 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); |
| 439 | if (!lookup_method) { |
| 440 | WARN("Failed to create ELF lookup method"); |
| 441 | ret = CMD_ERROR; |
| 442 | goto end_string; |
| 443 | } |
| 444 | break; |
| 445 | default: |
| 446 | ret = CMD_ERROR; |
| 447 | goto end_string; |
| 448 | } |
| 449 | |
| 450 | /* strutils_unescape_string allocates a new char *. */ |
| 451 | unescaped_target_path = strutils_unescape_string(target_path, 0); |
| 452 | if (!unescaped_target_path) { |
| 453 | ret = CMD_ERROR; |
| 454 | goto end_destroy_lookup_method; |
| 455 | } |
| 456 | |
| 457 | /* |
| 458 | * If there is not forward slash in the path. Walk the $PATH else |
| 459 | * expand. |
| 460 | */ |
| 461 | if (strchr(unescaped_target_path, '/') == NULL) { |
| 462 | /* Walk the $PATH variable to find the targeted binary. */ |
| 463 | real_target_path = zmalloc(LTTNG_PATH_MAX * sizeof(char)); |
| 464 | if (!real_target_path) { |
| 465 | PERROR("Error allocating path buffer"); |
| 466 | ret = CMD_ERROR; |
| 467 | goto end_destroy_lookup_method; |
| 468 | } |
| 469 | ret = walk_command_search_path(unescaped_target_path, real_target_path); |
| 470 | if (ret) { |
| 471 | ERR("Binary not found."); |
| 472 | ret = CMD_ERROR; |
| 473 | goto end_destroy_lookup_method; |
| 474 | } |
| 475 | } else { |
| 476 | /* |
| 477 | * Expand references to `/./` and `/../`. This function does not check |
| 478 | * if the file exists. This call returns an allocated buffer on |
| 479 | * success. |
| 480 | */ |
| 481 | real_target_path = utils_expand_path_keep_symlink(unescaped_target_path); |
| 482 | if (!real_target_path) { |
| 483 | ERR("Error expanding the path to binary."); |
| 484 | ret = CMD_ERROR; |
| 485 | goto end_destroy_lookup_method; |
| 486 | } |
| 487 | |
| 488 | /* |
| 489 | * Check if the file exists using access(2). If it does not, walk the |
| 490 | * $PATH. |
| 491 | */ |
| 492 | ret = access(real_target_path, F_OK); |
| 493 | if (ret) { |
| 494 | ERR("Cannot find binary at path: %s.", real_target_path); |
| 495 | ret = CMD_ERROR; |
| 496 | goto end_destroy_lookup_method; |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | switch (lttng_userspace_probe_location_lookup_method_get_type(lookup_method)) { |
| 501 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: |
| 502 | /* |
| 503 | * Check for common mistakes in userspace probe description syntax. |
| 504 | */ |
| 505 | ret = warn_userspace_probe_syntax(symbol_name); |
| 506 | if (ret) { |
| 507 | goto end_destroy_lookup_method; |
| 508 | } |
| 509 | |
| 510 | probe_location = lttng_userspace_probe_location_function_create( |
| 511 | real_target_path, symbol_name, lookup_method); |
| 512 | if (!probe_location) { |
| 513 | WARN("Failed to create function probe location"); |
| 514 | ret = CMD_ERROR; |
| 515 | goto end_destroy_lookup_method; |
| 516 | } |
| 517 | |
| 518 | /* Ownership transferred to probe_location. */ |
| 519 | lookup_method = NULL; |
| 520 | |
| 521 | ret = lttng_event_set_userspace_probe_location(ev, probe_location); |
| 522 | if (ret) { |
| 523 | WARN("Failed to set probe location on event"); |
| 524 | ret = CMD_ERROR; |
| 525 | goto end_destroy_location; |
| 526 | } |
| 527 | break; |
| 528 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
| 529 | probe_location = lttng_userspace_probe_location_tracepoint_create( |
| 530 | real_target_path, provider_name, probe_name, lookup_method); |
| 531 | if (!probe_location) { |
| 532 | WARN("Failed to create function probe location"); |
| 533 | ret = CMD_ERROR; |
| 534 | goto end_destroy_lookup_method; |
| 535 | } |
| 536 | |
| 537 | /* Ownership transferred to probe_location. */ |
| 538 | lookup_method = NULL; |
| 539 | |
| 540 | ret = lttng_event_set_userspace_probe_location(ev, probe_location); |
| 541 | if (ret) { |
| 542 | WARN("Failed to set probe location on event"); |
| 543 | ret = CMD_ERROR; |
| 544 | goto end_destroy_location; |
| 545 | } |
| 546 | break; |
| 547 | default: |
| 548 | ret = CMD_ERROR; |
| 549 | goto end_destroy_lookup_method; |
| 550 | } |
| 551 | |
| 552 | /* Successful parsing, now clean up everything and return. */ |
| 553 | goto end_string; |
| 554 | |
| 555 | end_destroy_location: |
| 556 | lttng_userspace_probe_location_destroy(probe_location); |
| 557 | end_destroy_lookup_method: |
| 558 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); |
| 559 | end_string: |
| 560 | strutils_free_null_terminated_array_of_strings(tokens); |
| 561 | /* |
| 562 | * Freeing both char * here makes the error handling simplier. free() |
| 563 | * performs not action if the pointer is NULL. |
| 564 | */ |
| 565 | free(real_target_path); |
| 566 | free(unescaped_target_path); |
| 567 | end: |
| 568 | return ret; |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * Maps LOG4j loglevel from string to value |
| 573 | */ |
| 574 | static int loglevel_log4j_str_to_value(const char *inputstr) |
| 575 | { |
| 576 | int i = 0; |
| 577 | char str[LTTNG_SYMBOL_NAME_LEN]; |
| 578 | |
| 579 | if (!inputstr || strlen(inputstr) == 0) { |
| 580 | return -1; |
| 581 | } |
| 582 | |
| 583 | /* |
| 584 | * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is |
| 585 | * added at the end of the loop so a the upper bound we avoid the overflow. |
| 586 | */ |
| 587 | while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') { |
| 588 | str[i] = toupper(inputstr[i]); |
| 589 | i++; |
| 590 | } |
| 591 | str[i] = '\0'; |
| 592 | |
| 593 | if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) { |
| 594 | return LTTNG_LOGLEVEL_LOG4J_OFF; |
| 595 | } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) { |
| 596 | return LTTNG_LOGLEVEL_LOG4J_FATAL; |
| 597 | } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) { |
| 598 | return LTTNG_LOGLEVEL_LOG4J_ERROR; |
| 599 | } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) { |
| 600 | return LTTNG_LOGLEVEL_LOG4J_WARN; |
| 601 | } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) { |
| 602 | return LTTNG_LOGLEVEL_LOG4J_INFO; |
| 603 | } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) { |
| 604 | return LTTNG_LOGLEVEL_LOG4J_DEBUG; |
| 605 | } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) { |
| 606 | return LTTNG_LOGLEVEL_LOG4J_TRACE; |
| 607 | } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) { |
| 608 | return LTTNG_LOGLEVEL_LOG4J_ALL; |
| 609 | } else { |
| 610 | return -1; |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | /* |
| 615 | * Maps JUL loglevel from string to value |
| 616 | */ |
| 617 | static int loglevel_jul_str_to_value(const char *inputstr) |
| 618 | { |
| 619 | int i = 0; |
| 620 | char str[LTTNG_SYMBOL_NAME_LEN]; |
| 621 | |
| 622 | if (!inputstr || strlen(inputstr) == 0) { |
| 623 | return -1; |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is |
| 628 | * added at the end of the loop so a the upper bound we avoid the overflow. |
| 629 | */ |
| 630 | while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') { |
| 631 | str[i] = toupper(inputstr[i]); |
| 632 | i++; |
| 633 | } |
| 634 | str[i] = '\0'; |
| 635 | |
| 636 | if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) { |
| 637 | return LTTNG_LOGLEVEL_JUL_OFF; |
| 638 | } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) { |
| 639 | return LTTNG_LOGLEVEL_JUL_SEVERE; |
| 640 | } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) { |
| 641 | return LTTNG_LOGLEVEL_JUL_WARNING; |
| 642 | } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) { |
| 643 | return LTTNG_LOGLEVEL_JUL_INFO; |
| 644 | } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) { |
| 645 | return LTTNG_LOGLEVEL_JUL_CONFIG; |
| 646 | } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) { |
| 647 | return LTTNG_LOGLEVEL_JUL_FINE; |
| 648 | } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) { |
| 649 | return LTTNG_LOGLEVEL_JUL_FINER; |
| 650 | } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) { |
| 651 | return LTTNG_LOGLEVEL_JUL_FINEST; |
| 652 | } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) { |
| 653 | return LTTNG_LOGLEVEL_JUL_ALL; |
| 654 | } else { |
| 655 | return -1; |
| 656 | } |
| 657 | } |
| 658 | |
| 659 | /* |
| 660 | * Maps Python loglevel from string to value |
| 661 | */ |
| 662 | static int loglevel_python_str_to_value(const char *inputstr) |
| 663 | { |
| 664 | int i = 0; |
| 665 | char str[LTTNG_SYMBOL_NAME_LEN]; |
| 666 | |
| 667 | if (!inputstr || strlen(inputstr) == 0) { |
| 668 | return -1; |
| 669 | } |
| 670 | |
| 671 | /* |
| 672 | * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is |
| 673 | * added at the end of the loop so a the upper bound we avoid the overflow. |
| 674 | */ |
| 675 | while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') { |
| 676 | str[i] = toupper(inputstr[i]); |
| 677 | i++; |
| 678 | } |
| 679 | str[i] = '\0'; |
| 680 | |
| 681 | if (!strcmp(str, "PYTHON_CRITICAL") || !strcmp(str, "CRITICAL")) { |
| 682 | return LTTNG_LOGLEVEL_PYTHON_CRITICAL; |
| 683 | } else if (!strcmp(str, "PYTHON_ERROR") || !strcmp(str, "ERROR")) { |
| 684 | return LTTNG_LOGLEVEL_PYTHON_ERROR; |
| 685 | } else if (!strcmp(str, "PYTHON_WARNING") || !strcmp(str, "WARNING")) { |
| 686 | return LTTNG_LOGLEVEL_PYTHON_WARNING; |
| 687 | } else if (!strcmp(str, "PYTHON_INFO") || !strcmp(str, "INFO")) { |
| 688 | return LTTNG_LOGLEVEL_PYTHON_INFO; |
| 689 | } else if (!strcmp(str, "PYTNON_DEBUG") || !strcmp(str, "DEBUG")) { |
| 690 | return LTTNG_LOGLEVEL_PYTHON_DEBUG; |
| 691 | } else if (!strcmp(str, "PYTHON_NOTSET") || !strcmp(str, "NOTSET")) { |
| 692 | return LTTNG_LOGLEVEL_PYTHON_NOTSET; |
| 693 | } else { |
| 694 | return -1; |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | /* |
| 699 | * Maps loglevel from string to value |
| 700 | */ |
| 701 | static |
| 702 | int loglevel_str_to_value(const char *inputstr) |
| 703 | { |
| 704 | int i = 0; |
| 705 | char str[LTTNG_SYMBOL_NAME_LEN]; |
| 706 | |
| 707 | if (!inputstr || strlen(inputstr) == 0) { |
| 708 | return -1; |
| 709 | } |
| 710 | |
| 711 | /* |
| 712 | * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is |
| 713 | * added at the end of the loop so a the upper bound we avoid the overflow. |
| 714 | */ |
| 715 | while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') { |
| 716 | str[i] = toupper(inputstr[i]); |
| 717 | i++; |
| 718 | } |
| 719 | str[i] = '\0'; |
| 720 | if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) { |
| 721 | return LTTNG_LOGLEVEL_EMERG; |
| 722 | } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) { |
| 723 | return LTTNG_LOGLEVEL_ALERT; |
| 724 | } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) { |
| 725 | return LTTNG_LOGLEVEL_CRIT; |
| 726 | } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) { |
| 727 | return LTTNG_LOGLEVEL_ERR; |
| 728 | } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) { |
| 729 | return LTTNG_LOGLEVEL_WARNING; |
| 730 | } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) { |
| 731 | return LTTNG_LOGLEVEL_NOTICE; |
| 732 | } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) { |
| 733 | return LTTNG_LOGLEVEL_INFO; |
| 734 | } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) { |
| 735 | return LTTNG_LOGLEVEL_DEBUG_SYSTEM; |
| 736 | } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) { |
| 737 | return LTTNG_LOGLEVEL_DEBUG_PROGRAM; |
| 738 | } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) { |
| 739 | return LTTNG_LOGLEVEL_DEBUG_PROCESS; |
| 740 | } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) { |
| 741 | return LTTNG_LOGLEVEL_DEBUG_MODULE; |
| 742 | } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) { |
| 743 | return LTTNG_LOGLEVEL_DEBUG_UNIT; |
| 744 | } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) { |
| 745 | return LTTNG_LOGLEVEL_DEBUG_FUNCTION; |
| 746 | } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) { |
| 747 | return LTTNG_LOGLEVEL_DEBUG_LINE; |
| 748 | } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) { |
| 749 | return LTTNG_LOGLEVEL_DEBUG; |
| 750 | } else { |
| 751 | return -1; |
| 752 | } |
| 753 | } |
| 754 | |
| 755 | static |
| 756 | const char *print_channel_name(const char *name) |
| 757 | { |
| 758 | return name ? : DEFAULT_CHANNEL_NAME; |
| 759 | } |
| 760 | |
| 761 | static |
| 762 | const char *print_raw_channel_name(const char *name) |
| 763 | { |
| 764 | return name ? : "<default>"; |
| 765 | } |
| 766 | |
| 767 | /* |
| 768 | * Mi print exlcusion list |
| 769 | */ |
| 770 | static |
| 771 | int mi_print_exclusion(char **names) |
| 772 | { |
| 773 | int i, ret; |
| 774 | int count = names ? strutils_array_of_strings_len(names) : 0; |
| 775 | |
| 776 | assert(writer); |
| 777 | |
| 778 | if (count == 0) { |
| 779 | ret = 0; |
| 780 | goto end; |
| 781 | } |
| 782 | ret = mi_lttng_writer_open_element(writer, config_element_exclusions); |
| 783 | if (ret) { |
| 784 | goto end; |
| 785 | } |
| 786 | |
| 787 | for (i = 0; i < count; i++) { |
| 788 | ret = mi_lttng_writer_write_element_string(writer, |
| 789 | config_element_exclusion, names[i]); |
| 790 | if (ret) { |
| 791 | goto end; |
| 792 | } |
| 793 | } |
| 794 | |
| 795 | /* Close exclusions element */ |
| 796 | ret = mi_lttng_writer_close_element(writer); |
| 797 | |
| 798 | end: |
| 799 | return ret; |
| 800 | } |
| 801 | |
| 802 | /* |
| 803 | * Return allocated string for pretty-printing exclusion names. |
| 804 | */ |
| 805 | static |
| 806 | char *print_exclusions(char **names) |
| 807 | { |
| 808 | int length = 0; |
| 809 | int i; |
| 810 | const char *preamble = " excluding "; |
| 811 | char *ret; |
| 812 | int count = names ? strutils_array_of_strings_len(names) : 0; |
| 813 | |
| 814 | if (count == 0) { |
| 815 | return strdup(""); |
| 816 | } |
| 817 | |
| 818 | /* calculate total required length */ |
| 819 | for (i = 0; i < count; i++) { |
| 820 | length += strlen(names[i]) + 4; |
| 821 | } |
| 822 | |
| 823 | /* add length of preamble + one for NUL - one for last (missing) comma */ |
| 824 | length += strlen(preamble); |
| 825 | ret = zmalloc(length + 1); |
| 826 | if (!ret) { |
| 827 | return NULL; |
| 828 | } |
| 829 | strncpy(ret, preamble, length); |
| 830 | for (i = 0; i < count; i++) { |
| 831 | strcat(ret, "\""); |
| 832 | strcat(ret, names[i]); |
| 833 | strcat(ret, "\""); |
| 834 | if (i != count - 1) { |
| 835 | strcat(ret, ", "); |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | return ret; |
| 840 | } |
| 841 | |
| 842 | static |
| 843 | int check_exclusion_subsets(const char *event_name, const char *exclusion) |
| 844 | { |
| 845 | bool warn = false; |
| 846 | int ret = 0; |
| 847 | const char *e = event_name; |
| 848 | const char *x = exclusion; |
| 849 | |
| 850 | /* Scan both the excluder and the event letter by letter */ |
| 851 | while (true) { |
| 852 | if (*e == '\\') { |
| 853 | if (*x != *e) { |
| 854 | warn = true; |
| 855 | goto end; |
| 856 | } |
| 857 | |
| 858 | e++; |
| 859 | x++; |
| 860 | goto cmp_chars; |
| 861 | } |
| 862 | |
| 863 | if (*x == '*') { |
| 864 | /* Event is a subset of the excluder */ |
| 865 | ERR("Event %s: %s excludes all events from %s", |
| 866 | event_name, exclusion, event_name); |
| 867 | goto error; |
| 868 | } |
| 869 | |
| 870 | if (*e == '*') { |
| 871 | /* |
| 872 | * Reached the end of the event name before the |
| 873 | * end of the exclusion: this is valid. |
| 874 | */ |
| 875 | goto end; |
| 876 | } |
| 877 | |
| 878 | cmp_chars: |
| 879 | if (*x != *e) { |
| 880 | warn = true; |
| 881 | break; |
| 882 | } |
| 883 | |
| 884 | x++; |
| 885 | e++; |
| 886 | } |
| 887 | |
| 888 | goto end; |
| 889 | |
| 890 | error: |
| 891 | ret = -1; |
| 892 | |
| 893 | end: |
| 894 | if (warn) { |
| 895 | WARN("Event %s: %s does not exclude any events from %s", |
| 896 | event_name, exclusion, event_name); |
| 897 | } |
| 898 | |
| 899 | return ret; |
| 900 | } |
| 901 | |
| 902 | static |
| 903 | int create_exclusion_list_and_validate(const char *event_name, |
| 904 | const char *exclusions_arg, |
| 905 | char ***exclusion_list) |
| 906 | { |
| 907 | int ret = 0; |
| 908 | char **exclusions = NULL; |
| 909 | |
| 910 | /* Event name must be a valid globbing pattern to allow exclusions. */ |
| 911 | if (!strutils_is_star_glob_pattern(event_name)) { |
| 912 | ERR("Event %s: Exclusions can only be used with a globbing pattern", |
| 913 | event_name); |
| 914 | goto error; |
| 915 | } |
| 916 | |
| 917 | /* Split exclusions. */ |
| 918 | exclusions = strutils_split(exclusions_arg, ',', true); |
| 919 | if (!exclusions) { |
| 920 | goto error; |
| 921 | } |
| 922 | |
| 923 | /* |
| 924 | * If the event name is a star-at-end only globbing pattern, |
| 925 | * then we can validate the individual exclusions. Otherwise |
| 926 | * all exclusions are passed to the session daemon. |
| 927 | */ |
| 928 | if (strutils_is_star_at_the_end_only_glob_pattern(event_name)) { |
| 929 | char * const *exclusion; |
| 930 | |
| 931 | for (exclusion = exclusions; *exclusion; exclusion++) { |
| 932 | if (!strutils_is_star_glob_pattern(*exclusion) || |
| 933 | strutils_is_star_at_the_end_only_glob_pattern(*exclusion)) { |
| 934 | ret = check_exclusion_subsets(event_name, *exclusion); |
| 935 | if (ret) { |
| 936 | goto error; |
| 937 | } |
| 938 | } |
| 939 | } |
| 940 | } |
| 941 | |
| 942 | *exclusion_list = exclusions; |
| 943 | |
| 944 | goto end; |
| 945 | |
| 946 | error: |
| 947 | ret = -1; |
| 948 | strutils_free_null_terminated_array_of_strings(exclusions); |
| 949 | |
| 950 | end: |
| 951 | return ret; |
| 952 | } |
| 953 | |
| 954 | static void warn_on_truncated_exclusion_names(char * const *exclusion_list, |
| 955 | int *warn) |
| 956 | { |
| 957 | char * const *exclusion; |
| 958 | |
| 959 | for (exclusion = exclusion_list; *exclusion; exclusion++) { |
| 960 | if (strlen(*exclusion) >= LTTNG_SYMBOL_NAME_LEN) { |
| 961 | WARN("Event exclusion \"%s\" will be truncated", |
| 962 | *exclusion); |
| 963 | *warn = 1; |
| 964 | } |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | /* |
| 969 | * Enabling event using the lttng API. |
| 970 | * Note: in case of error only the last error code will be return. |
| 971 | */ |
| 972 | static int enable_events(char *session_name) |
| 973 | { |
| 974 | int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS; |
| 975 | int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1; |
| 976 | char *event_name, *channel_name = NULL; |
| 977 | struct lttng_event *ev; |
| 978 | struct lttng_domain dom; |
| 979 | char **exclusion_list = NULL; |
| 980 | |
| 981 | memset(&dom, 0, sizeof(dom)); |
| 982 | |
| 983 | ev = lttng_event_create(); |
| 984 | if (!ev) { |
| 985 | ret = CMD_ERROR; |
| 986 | goto error; |
| 987 | } |
| 988 | |
| 989 | if (opt_kernel) { |
| 990 | if (opt_loglevel) { |
| 991 | WARN("Kernel loglevels are not supported."); |
| 992 | } |
| 993 | } |
| 994 | |
| 995 | /* Create lttng domain */ |
| 996 | if (opt_kernel) { |
| 997 | dom.type = LTTNG_DOMAIN_KERNEL; |
| 998 | dom.buf_type = LTTNG_BUFFER_GLOBAL; |
| 999 | } else if (opt_userspace) { |
| 1000 | dom.type = LTTNG_DOMAIN_UST; |
| 1001 | /* Default. */ |
| 1002 | dom.buf_type = LTTNG_BUFFER_PER_UID; |
| 1003 | } else if (opt_jul) { |
| 1004 | dom.type = LTTNG_DOMAIN_JUL; |
| 1005 | /* Default. */ |
| 1006 | dom.buf_type = LTTNG_BUFFER_PER_UID; |
| 1007 | } else if (opt_log4j) { |
| 1008 | dom.type = LTTNG_DOMAIN_LOG4J; |
| 1009 | /* Default. */ |
| 1010 | dom.buf_type = LTTNG_BUFFER_PER_UID; |
| 1011 | } else if (opt_python) { |
| 1012 | dom.type = LTTNG_DOMAIN_PYTHON; |
| 1013 | /* Default. */ |
| 1014 | dom.buf_type = LTTNG_BUFFER_PER_UID; |
| 1015 | } else { |
| 1016 | /* Checked by the caller. */ |
| 1017 | assert(0); |
| 1018 | } |
| 1019 | |
| 1020 | if (opt_exclude) { |
| 1021 | switch (dom.type) { |
| 1022 | case LTTNG_DOMAIN_KERNEL: |
| 1023 | case LTTNG_DOMAIN_JUL: |
| 1024 | case LTTNG_DOMAIN_LOG4J: |
| 1025 | case LTTNG_DOMAIN_PYTHON: |
| 1026 | ERR("Event name exclusions are not yet implemented for %s events", |
| 1027 | get_domain_str(dom.type)); |
| 1028 | ret = CMD_ERROR; |
| 1029 | goto error; |
| 1030 | case LTTNG_DOMAIN_UST: |
| 1031 | /* Exclusions supported */ |
| 1032 | break; |
| 1033 | default: |
| 1034 | assert(0); |
| 1035 | } |
| 1036 | } |
| 1037 | |
| 1038 | /* |
| 1039 | * Adding a filter to a probe, function or userspace-probe would be |
| 1040 | * denied by the kernel tracer as it's not supported at the moment. We |
| 1041 | * do an early check here to warn the user. |
| 1042 | */ |
| 1043 | if (opt_filter && opt_kernel) { |
| 1044 | switch (opt_event_type) { |
| 1045 | case LTTNG_EVENT_ALL: |
| 1046 | case LTTNG_EVENT_TRACEPOINT: |
| 1047 | case LTTNG_EVENT_SYSCALL: |
| 1048 | break; |
| 1049 | case LTTNG_EVENT_PROBE: |
| 1050 | case LTTNG_EVENT_USERSPACE_PROBE: |
| 1051 | case LTTNG_EVENT_FUNCTION: |
| 1052 | ERR("Filter expressions are not supported for %s events", |
| 1053 | get_event_type_str(opt_event_type)); |
| 1054 | ret = CMD_ERROR; |
| 1055 | goto error; |
| 1056 | default: |
| 1057 | ret = CMD_UNDEFINED; |
| 1058 | goto error; |
| 1059 | } |
| 1060 | } |
| 1061 | |
| 1062 | channel_name = opt_channel_name; |
| 1063 | |
| 1064 | handle = lttng_create_handle(session_name, &dom); |
| 1065 | if (handle == NULL) { |
| 1066 | ret = -1; |
| 1067 | goto error; |
| 1068 | } |
| 1069 | |
| 1070 | /* Prepare Mi */ |
| 1071 | if (lttng_opt_mi) { |
| 1072 | /* Open a events element */ |
| 1073 | ret = mi_lttng_writer_open_element(writer, config_element_events); |
| 1074 | if (ret) { |
| 1075 | ret = CMD_ERROR; |
| 1076 | goto error; |
| 1077 | } |
| 1078 | } |
| 1079 | |
| 1080 | if (opt_enable_all) { |
| 1081 | /* Default setup for enable all */ |
| 1082 | if (opt_kernel) { |
| 1083 | ev->type = opt_event_type; |
| 1084 | strcpy(ev->name, "*"); |
| 1085 | /* kernel loglevels not implemented */ |
| 1086 | ev->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
| 1087 | } else { |
| 1088 | ev->type = LTTNG_EVENT_TRACEPOINT; |
| 1089 | strcpy(ev->name, "*"); |
| 1090 | ev->loglevel_type = opt_loglevel_type; |
| 1091 | if (opt_loglevel) { |
| 1092 | assert(opt_userspace || opt_jul || opt_log4j || opt_python); |
| 1093 | if (opt_userspace) { |
| 1094 | ev->loglevel = loglevel_str_to_value(opt_loglevel); |
| 1095 | } else if (opt_jul) { |
| 1096 | ev->loglevel = loglevel_jul_str_to_value(opt_loglevel); |
| 1097 | } else if (opt_log4j) { |
| 1098 | ev->loglevel = loglevel_log4j_str_to_value(opt_loglevel); |
| 1099 | } else if (opt_python) { |
| 1100 | ev->loglevel = loglevel_python_str_to_value(opt_loglevel); |
| 1101 | } |
| 1102 | if (ev->loglevel == -1) { |
| 1103 | ERR("Unknown loglevel %s", opt_loglevel); |
| 1104 | ret = -LTTNG_ERR_INVALID; |
| 1105 | goto error; |
| 1106 | } |
| 1107 | } else { |
| 1108 | assert(opt_userspace || opt_jul || opt_log4j || opt_python); |
| 1109 | if (opt_userspace) { |
| 1110 | ev->loglevel = -1; |
| 1111 | } else if (opt_jul) { |
| 1112 | ev->loglevel = LTTNG_LOGLEVEL_JUL_ALL; |
| 1113 | } else if (opt_log4j) { |
| 1114 | ev->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; |
| 1115 | } else if (opt_python) { |
| 1116 | ev->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG; |
| 1117 | } |
| 1118 | } |
| 1119 | } |
| 1120 | |
| 1121 | if (opt_exclude) { |
| 1122 | ret = create_exclusion_list_and_validate("*", |
| 1123 | opt_exclude, &exclusion_list); |
| 1124 | if (ret) { |
| 1125 | ret = CMD_ERROR; |
| 1126 | goto error; |
| 1127 | } |
| 1128 | |
| 1129 | ev->exclusion = 1; |
| 1130 | warn_on_truncated_exclusion_names(exclusion_list, |
| 1131 | &warn); |
| 1132 | } |
| 1133 | if (!opt_filter) { |
| 1134 | ret = lttng_enable_event_with_exclusions(handle, |
| 1135 | ev, channel_name, |
| 1136 | NULL, |
| 1137 | exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0, |
| 1138 | exclusion_list); |
| 1139 | if (ret < 0) { |
| 1140 | switch (-ret) { |
| 1141 | case LTTNG_ERR_KERN_EVENT_EXIST: |
| 1142 | WARN("Kernel events already enabled (channel %s, session %s)", |
| 1143 | print_channel_name(channel_name), session_name); |
| 1144 | warn = 1; |
| 1145 | break; |
| 1146 | case LTTNG_ERR_TRACE_ALREADY_STARTED: |
| 1147 | { |
| 1148 | const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once."; |
| 1149 | ERR("Events: %s (channel %s, session %s)", |
| 1150 | msg, |
| 1151 | print_channel_name(channel_name), |
| 1152 | session_name); |
| 1153 | error = 1; |
| 1154 | break; |
| 1155 | } |
| 1156 | default: |
| 1157 | ERR("Events: %s (channel %s, session %s)", |
| 1158 | lttng_strerror(ret), |
| 1159 | ret == -LTTNG_ERR_NEED_CHANNEL_NAME |
| 1160 | ? print_raw_channel_name(channel_name) |
| 1161 | : print_channel_name(channel_name), |
| 1162 | session_name); |
| 1163 | error = 1; |
| 1164 | break; |
| 1165 | } |
| 1166 | goto end; |
| 1167 | } |
| 1168 | |
| 1169 | switch (opt_event_type) { |
| 1170 | case LTTNG_EVENT_TRACEPOINT: |
| 1171 | if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) { |
| 1172 | char *exclusion_string = print_exclusions(exclusion_list); |
| 1173 | |
| 1174 | if (!exclusion_string) { |
| 1175 | PERROR("Cannot allocate exclusion_string"); |
| 1176 | error = 1; |
| 1177 | goto end; |
| 1178 | } |
| 1179 | MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s", |
| 1180 | get_domain_str(dom.type), |
| 1181 | exclusion_string, |
| 1182 | print_channel_name(channel_name), |
| 1183 | opt_loglevel); |
| 1184 | free(exclusion_string); |
| 1185 | } else { |
| 1186 | char *exclusion_string = print_exclusions(exclusion_list); |
| 1187 | |
| 1188 | if (!exclusion_string) { |
| 1189 | PERROR("Cannot allocate exclusion_string"); |
| 1190 | error = 1; |
| 1191 | goto end; |
| 1192 | } |
| 1193 | MSG("All %s tracepoints%s are enabled in channel %s", |
| 1194 | get_domain_str(dom.type), |
| 1195 | exclusion_string, |
| 1196 | print_channel_name(channel_name)); |
| 1197 | free(exclusion_string); |
| 1198 | } |
| 1199 | break; |
| 1200 | case LTTNG_EVENT_SYSCALL: |
| 1201 | if (opt_kernel) { |
| 1202 | MSG("All %s system calls are enabled in channel %s", |
| 1203 | get_domain_str(dom.type), |
| 1204 | print_channel_name(channel_name)); |
| 1205 | } |
| 1206 | break; |
| 1207 | case LTTNG_EVENT_ALL: |
| 1208 | if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) { |
| 1209 | char *exclusion_string = print_exclusions(exclusion_list); |
| 1210 | |
| 1211 | if (!exclusion_string) { |
| 1212 | PERROR("Cannot allocate exclusion_string"); |
| 1213 | error = 1; |
| 1214 | goto end; |
| 1215 | } |
| 1216 | MSG("All %s events%s are enabled in channel %s for loglevel %s", |
| 1217 | get_domain_str(dom.type), |
| 1218 | exclusion_string, |
| 1219 | print_channel_name(channel_name), |
| 1220 | opt_loglevel); |
| 1221 | free(exclusion_string); |
| 1222 | } else { |
| 1223 | char *exclusion_string = print_exclusions(exclusion_list); |
| 1224 | |
| 1225 | if (!exclusion_string) { |
| 1226 | PERROR("Cannot allocate exclusion_string"); |
| 1227 | error = 1; |
| 1228 | goto end; |
| 1229 | } |
| 1230 | MSG("All %s events%s are enabled in channel %s", |
| 1231 | get_domain_str(dom.type), |
| 1232 | exclusion_string, |
| 1233 | print_channel_name(channel_name)); |
| 1234 | free(exclusion_string); |
| 1235 | } |
| 1236 | break; |
| 1237 | default: |
| 1238 | /* |
| 1239 | * We should not be here since lttng_enable_event should have |
| 1240 | * failed on the event type. |
| 1241 | */ |
| 1242 | goto error; |
| 1243 | } |
| 1244 | } |
| 1245 | |
| 1246 | if (opt_filter) { |
| 1247 | command_ret = lttng_enable_event_with_exclusions(handle, ev, channel_name, |
| 1248 | opt_filter, |
| 1249 | exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0, |
| 1250 | exclusion_list); |
| 1251 | if (command_ret < 0) { |
| 1252 | switch (-command_ret) { |
| 1253 | case LTTNG_ERR_FILTER_EXIST: |
| 1254 | WARN("Filter on all events is already enabled" |
| 1255 | " (channel %s, session %s)", |
| 1256 | print_channel_name(channel_name), session_name); |
| 1257 | warn = 1; |
| 1258 | break; |
| 1259 | case LTTNG_ERR_TRACE_ALREADY_STARTED: |
| 1260 | { |
| 1261 | const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once."; |
| 1262 | ERR("All events: %s (channel %s, session %s, filter \'%s\')", |
| 1263 | msg, |
| 1264 | print_channel_name(channel_name), |
| 1265 | session_name, opt_filter); |
| 1266 | error = 1; |
| 1267 | break; |
| 1268 | } |
| 1269 | default: |
| 1270 | ERR("All events: %s (channel %s, session %s, filter \'%s\')", |
| 1271 | lttng_strerror(command_ret), |
| 1272 | command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME |
| 1273 | ? print_raw_channel_name(channel_name) |
| 1274 | : print_channel_name(channel_name), |
| 1275 | session_name, opt_filter); |
| 1276 | error = 1; |
| 1277 | break; |
| 1278 | } |
| 1279 | error_holder = command_ret; |
| 1280 | } else { |
| 1281 | ev->filter = 1; |
| 1282 | MSG("Filter '%s' successfully set", opt_filter); |
| 1283 | } |
| 1284 | } |
| 1285 | |
| 1286 | if (lttng_opt_mi) { |
| 1287 | /* The wildcard * is used for kernel and ust domain to |
| 1288 | * represent ALL. We copy * in event name to force the wildcard use |
| 1289 | * for kernel domain |
| 1290 | * |
| 1291 | * Note: this is strictly for semantic and printing while in |
| 1292 | * machine interface mode. |
| 1293 | */ |
| 1294 | strcpy(ev->name, "*"); |
| 1295 | |
| 1296 | /* If we reach here the events are enabled */ |
| 1297 | if (!error && !warn) { |
| 1298 | ev->enabled = 1; |
| 1299 | } else { |
| 1300 | ev->enabled = 0; |
| 1301 | success = 0; |
| 1302 | } |
| 1303 | ret = mi_lttng_event(writer, ev, 1, handle->domain.type); |
| 1304 | if (ret) { |
| 1305 | ret = CMD_ERROR; |
| 1306 | goto error; |
| 1307 | } |
| 1308 | |
| 1309 | /* print exclusion */ |
| 1310 | ret = mi_print_exclusion(exclusion_list); |
| 1311 | if (ret) { |
| 1312 | ret = CMD_ERROR; |
| 1313 | goto error; |
| 1314 | } |
| 1315 | |
| 1316 | /* Success ? */ |
| 1317 | ret = mi_lttng_writer_write_element_bool(writer, |
| 1318 | mi_lttng_element_command_success, success); |
| 1319 | if (ret) { |
| 1320 | ret = CMD_ERROR; |
| 1321 | goto error; |
| 1322 | } |
| 1323 | |
| 1324 | /* Close event element */ |
| 1325 | ret = mi_lttng_writer_close_element(writer); |
| 1326 | if (ret) { |
| 1327 | ret = CMD_ERROR; |
| 1328 | goto error; |
| 1329 | } |
| 1330 | } |
| 1331 | |
| 1332 | goto end; |
| 1333 | } |
| 1334 | |
| 1335 | /* Strip event list */ |
| 1336 | event_name = strtok(opt_event_list, ","); |
| 1337 | while (event_name != NULL) { |
| 1338 | /* Copy name and type of the event */ |
| 1339 | strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN); |
| 1340 | ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 1341 | ev->type = opt_event_type; |
| 1342 | |
| 1343 | /* Kernel tracer action */ |
| 1344 | if (opt_kernel) { |
| 1345 | DBG("Enabling kernel event %s for channel %s", |
| 1346 | event_name, |
| 1347 | print_channel_name(channel_name)); |
| 1348 | |
| 1349 | switch (opt_event_type) { |
| 1350 | case LTTNG_EVENT_ALL: /* Enable tracepoints and syscalls */ |
| 1351 | /* If event name differs from *, select tracepoint. */ |
| 1352 | if (strcmp(ev->name, "*")) { |
| 1353 | ev->type = LTTNG_EVENT_TRACEPOINT; |
| 1354 | } |
| 1355 | break; |
| 1356 | case LTTNG_EVENT_TRACEPOINT: |
| 1357 | break; |
| 1358 | case LTTNG_EVENT_PROBE: |
| 1359 | ret = parse_probe_opts(ev, opt_probe); |
| 1360 | if (ret) { |
| 1361 | ERR("Unable to parse probe options"); |
| 1362 | ret = CMD_ERROR; |
| 1363 | goto error; |
| 1364 | } |
| 1365 | break; |
| 1366 | case LTTNG_EVENT_USERSPACE_PROBE: |
| 1367 | ret = parse_userspace_probe_opts(ev, opt_userspace_probe); |
| 1368 | if (ret) { |
| 1369 | switch (ret) { |
| 1370 | case CMD_UNSUPPORTED: |
| 1371 | /* |
| 1372 | * Error message describing |
| 1373 | * what is not supported was |
| 1374 | * printed in the function. |
| 1375 | */ |
| 1376 | break; |
| 1377 | case CMD_ERROR: |
| 1378 | default: |
| 1379 | ERR("Unable to parse userspace probe options"); |
| 1380 | break; |
| 1381 | } |
| 1382 | goto error; |
| 1383 | } |
| 1384 | break; |
| 1385 | case LTTNG_EVENT_FUNCTION: |
| 1386 | ret = parse_probe_opts(ev, opt_function); |
| 1387 | if (ret) { |
| 1388 | ERR("Unable to parse function probe options"); |
| 1389 | ret = CMD_ERROR; |
| 1390 | goto error; |
| 1391 | } |
| 1392 | break; |
| 1393 | case LTTNG_EVENT_SYSCALL: |
| 1394 | ev->type = LTTNG_EVENT_SYSCALL; |
| 1395 | break; |
| 1396 | default: |
| 1397 | ret = CMD_UNDEFINED; |
| 1398 | goto error; |
| 1399 | } |
| 1400 | |
| 1401 | /* kernel loglevels not implemented */ |
| 1402 | ev->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
| 1403 | } else if (opt_userspace) { /* User-space tracer action */ |
| 1404 | DBG("Enabling UST event %s for channel %s, loglevel %s", event_name, |
| 1405 | print_channel_name(channel_name), opt_loglevel ? : "<all>"); |
| 1406 | |
| 1407 | switch (opt_event_type) { |
| 1408 | case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */ |
| 1409 | /* Fall-through */ |
| 1410 | case LTTNG_EVENT_TRACEPOINT: |
| 1411 | /* Copy name and type of the event */ |
| 1412 | ev->type = LTTNG_EVENT_TRACEPOINT; |
| 1413 | strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN); |
| 1414 | ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 1415 | break; |
| 1416 | case LTTNG_EVENT_PROBE: |
| 1417 | case LTTNG_EVENT_FUNCTION: |
| 1418 | case LTTNG_EVENT_SYSCALL: |
| 1419 | case LTTNG_EVENT_USERSPACE_PROBE: |
| 1420 | default: |
| 1421 | ERR("Event type not available for user-space tracing"); |
| 1422 | ret = CMD_UNSUPPORTED; |
| 1423 | goto error; |
| 1424 | } |
| 1425 | |
| 1426 | if (opt_exclude) { |
| 1427 | ev->exclusion = 1; |
| 1428 | if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) { |
| 1429 | ERR("Exclusion option can only be used with tracepoint events"); |
| 1430 | ret = CMD_ERROR; |
| 1431 | goto error; |
| 1432 | } |
| 1433 | /* Free previously allocated items */ |
| 1434 | strutils_free_null_terminated_array_of_strings( |
| 1435 | exclusion_list); |
| 1436 | exclusion_list = NULL; |
| 1437 | ret = create_exclusion_list_and_validate( |
| 1438 | event_name, opt_exclude, |
| 1439 | &exclusion_list); |
| 1440 | if (ret) { |
| 1441 | ret = CMD_ERROR; |
| 1442 | goto error; |
| 1443 | } |
| 1444 | |
| 1445 | warn_on_truncated_exclusion_names( |
| 1446 | exclusion_list, &warn); |
| 1447 | } |
| 1448 | |
| 1449 | ev->loglevel_type = opt_loglevel_type; |
| 1450 | if (opt_loglevel) { |
| 1451 | ev->loglevel = loglevel_str_to_value(opt_loglevel); |
| 1452 | if (ev->loglevel == -1) { |
| 1453 | ERR("Unknown loglevel %s", opt_loglevel); |
| 1454 | ret = -LTTNG_ERR_INVALID; |
| 1455 | goto error; |
| 1456 | } |
| 1457 | } else { |
| 1458 | ev->loglevel = -1; |
| 1459 | } |
| 1460 | } else if (opt_jul || opt_log4j || opt_python) { |
| 1461 | if (opt_event_type != LTTNG_EVENT_ALL && |
| 1462 | opt_event_type != LTTNG_EVENT_TRACEPOINT) { |
| 1463 | ERR("Event type not supported for domain."); |
| 1464 | ret = CMD_UNSUPPORTED; |
| 1465 | goto error; |
| 1466 | } |
| 1467 | |
| 1468 | ev->loglevel_type = opt_loglevel_type; |
| 1469 | if (opt_loglevel) { |
| 1470 | if (opt_jul) { |
| 1471 | ev->loglevel = loglevel_jul_str_to_value(opt_loglevel); |
| 1472 | } else if (opt_log4j) { |
| 1473 | ev->loglevel = loglevel_log4j_str_to_value(opt_loglevel); |
| 1474 | } else if (opt_python) { |
| 1475 | ev->loglevel = loglevel_python_str_to_value(opt_loglevel); |
| 1476 | } |
| 1477 | if (ev->loglevel == -1) { |
| 1478 | ERR("Unknown loglevel %s", opt_loglevel); |
| 1479 | ret = -LTTNG_ERR_INVALID; |
| 1480 | goto error; |
| 1481 | } |
| 1482 | } else { |
| 1483 | if (opt_jul) { |
| 1484 | ev->loglevel = LTTNG_LOGLEVEL_JUL_ALL; |
| 1485 | } else if (opt_log4j) { |
| 1486 | ev->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL; |
| 1487 | } else if (opt_python) { |
| 1488 | ev->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG; |
| 1489 | } |
| 1490 | } |
| 1491 | ev->type = LTTNG_EVENT_TRACEPOINT; |
| 1492 | strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN); |
| 1493 | ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 1494 | } else { |
| 1495 | assert(0); |
| 1496 | } |
| 1497 | |
| 1498 | if (!opt_filter) { |
| 1499 | char *exclusion_string; |
| 1500 | |
| 1501 | command_ret = lttng_enable_event_with_exclusions(handle, |
| 1502 | ev, channel_name, |
| 1503 | NULL, |
| 1504 | exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0, |
| 1505 | exclusion_list); |
| 1506 | exclusion_string = print_exclusions(exclusion_list); |
| 1507 | if (!exclusion_string) { |
| 1508 | PERROR("Cannot allocate exclusion_string"); |
| 1509 | error = 1; |
| 1510 | goto end; |
| 1511 | } |
| 1512 | if (command_ret < 0) { |
| 1513 | /* Turn ret to positive value to handle the positive error code */ |
| 1514 | switch (-command_ret) { |
| 1515 | case LTTNG_ERR_KERN_EVENT_EXIST: |
| 1516 | WARN("Kernel event %s%s already enabled (channel %s, session %s)", |
| 1517 | event_name, |
| 1518 | exclusion_string, |
| 1519 | print_channel_name(channel_name), session_name); |
| 1520 | warn = 1; |
| 1521 | break; |
| 1522 | case LTTNG_ERR_TRACE_ALREADY_STARTED: |
| 1523 | { |
| 1524 | const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once."; |
| 1525 | ERR("Event %s%s: %s (channel %s, session %s)", event_name, |
| 1526 | exclusion_string, |
| 1527 | msg, |
| 1528 | print_channel_name(channel_name), |
| 1529 | session_name); |
| 1530 | error = 1; |
| 1531 | break; |
| 1532 | } |
| 1533 | case LTTNG_ERR_SDT_PROBE_SEMAPHORE: |
| 1534 | ERR("SDT probes %s guarded by semaphores are not supported (channel %s, session %s)", |
| 1535 | event_name, print_channel_name(channel_name), |
| 1536 | session_name); |
| 1537 | error = 1; |
| 1538 | break; |
| 1539 | default: |
| 1540 | ERR("Event %s%s: %s (channel %s, session %s)", event_name, |
| 1541 | exclusion_string, |
| 1542 | lttng_strerror(command_ret), |
| 1543 | command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME |
| 1544 | ? print_raw_channel_name(channel_name) |
| 1545 | : print_channel_name(channel_name), |
| 1546 | session_name); |
| 1547 | error = 1; |
| 1548 | break; |
| 1549 | } |
| 1550 | error_holder = command_ret; |
| 1551 | } else { |
| 1552 | switch (dom.type) { |
| 1553 | case LTTNG_DOMAIN_KERNEL: |
| 1554 | case LTTNG_DOMAIN_UST: |
| 1555 | MSG("%s event %s%s created in channel %s", |
| 1556 | get_domain_str(dom.type), |
| 1557 | event_name, |
| 1558 | exclusion_string, |
| 1559 | print_channel_name(channel_name)); |
| 1560 | break; |
| 1561 | case LTTNG_DOMAIN_JUL: |
| 1562 | case LTTNG_DOMAIN_LOG4J: |
| 1563 | case LTTNG_DOMAIN_PYTHON: |
| 1564 | /* |
| 1565 | * Don't print the default channel |
| 1566 | * name for agent domains. |
| 1567 | */ |
| 1568 | MSG("%s event %s%s enabled", |
| 1569 | get_domain_str(dom.type), |
| 1570 | event_name, |
| 1571 | exclusion_string); |
| 1572 | break; |
| 1573 | default: |
| 1574 | assert(0); |
| 1575 | } |
| 1576 | } |
| 1577 | free(exclusion_string); |
| 1578 | } |
| 1579 | |
| 1580 | if (opt_filter) { |
| 1581 | char *exclusion_string; |
| 1582 | |
| 1583 | /* Filter present */ |
| 1584 | ev->filter = 1; |
| 1585 | |
| 1586 | command_ret = lttng_enable_event_with_exclusions(handle, ev, channel_name, |
| 1587 | opt_filter, |
| 1588 | exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0, |
| 1589 | exclusion_list); |
| 1590 | exclusion_string = print_exclusions(exclusion_list); |
| 1591 | if (!exclusion_string) { |
| 1592 | PERROR("Cannot allocate exclusion_string"); |
| 1593 | error = 1; |
| 1594 | goto end; |
| 1595 | } |
| 1596 | if (command_ret < 0) { |
| 1597 | switch (-command_ret) { |
| 1598 | case LTTNG_ERR_FILTER_EXIST: |
| 1599 | WARN("Filter on event %s%s is already enabled" |
| 1600 | " (channel %s, session %s)", |
| 1601 | event_name, |
| 1602 | exclusion_string, |
| 1603 | print_channel_name(channel_name), session_name); |
| 1604 | warn = 1; |
| 1605 | break; |
| 1606 | case LTTNG_ERR_TRACE_ALREADY_STARTED: |
| 1607 | { |
| 1608 | const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once."; |
| 1609 | ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev->name, |
| 1610 | exclusion_string, |
| 1611 | msg, |
| 1612 | print_channel_name(channel_name), |
| 1613 | session_name, opt_filter); |
| 1614 | error = 1; |
| 1615 | break; |
| 1616 | } |
| 1617 | default: |
| 1618 | ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev->name, |
| 1619 | exclusion_string, |
| 1620 | lttng_strerror(command_ret), |
| 1621 | command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME |
| 1622 | ? print_raw_channel_name(channel_name) |
| 1623 | : print_channel_name(channel_name), |
| 1624 | session_name, opt_filter); |
| 1625 | error = 1; |
| 1626 | break; |
| 1627 | } |
| 1628 | error_holder = command_ret; |
| 1629 | |
| 1630 | } else { |
| 1631 | MSG("Event %s%s: Filter '%s' successfully set", |
| 1632 | event_name, exclusion_string, |
| 1633 | opt_filter); |
| 1634 | } |
| 1635 | free(exclusion_string); |
| 1636 | } |
| 1637 | |
| 1638 | if (lttng_opt_mi) { |
| 1639 | if (command_ret) { |
| 1640 | success = 0; |
| 1641 | ev->enabled = 0; |
| 1642 | } else { |
| 1643 | ev->enabled = 1; |
| 1644 | } |
| 1645 | |
| 1646 | ret = mi_lttng_event(writer, ev, 1, handle->domain.type); |
| 1647 | if (ret) { |
| 1648 | ret = CMD_ERROR; |
| 1649 | goto error; |
| 1650 | } |
| 1651 | |
| 1652 | /* print exclusion */ |
| 1653 | ret = mi_print_exclusion(exclusion_list); |
| 1654 | if (ret) { |
| 1655 | ret = CMD_ERROR; |
| 1656 | goto error; |
| 1657 | } |
| 1658 | |
| 1659 | /* Success ? */ |
| 1660 | ret = mi_lttng_writer_write_element_bool(writer, |
| 1661 | mi_lttng_element_command_success, success); |
| 1662 | if (ret) { |
| 1663 | ret = CMD_ERROR; |
| 1664 | goto end; |
| 1665 | } |
| 1666 | |
| 1667 | /* Close event element */ |
| 1668 | ret = mi_lttng_writer_close_element(writer); |
| 1669 | if (ret) { |
| 1670 | ret = CMD_ERROR; |
| 1671 | goto end; |
| 1672 | } |
| 1673 | } |
| 1674 | |
| 1675 | /* Next event */ |
| 1676 | event_name = strtok(NULL, ","); |
| 1677 | /* Reset warn, error and success */ |
| 1678 | success = 1; |
| 1679 | } |
| 1680 | |
| 1681 | end: |
| 1682 | /* Close Mi */ |
| 1683 | if (lttng_opt_mi) { |
| 1684 | /* Close events element */ |
| 1685 | ret = mi_lttng_writer_close_element(writer); |
| 1686 | if (ret) { |
| 1687 | ret = CMD_ERROR; |
| 1688 | goto error; |
| 1689 | } |
| 1690 | } |
| 1691 | error: |
| 1692 | if (warn) { |
| 1693 | ret = CMD_WARNING; |
| 1694 | } |
| 1695 | if (error) { |
| 1696 | ret = CMD_ERROR; |
| 1697 | } |
| 1698 | lttng_destroy_handle(handle); |
| 1699 | strutils_free_null_terminated_array_of_strings(exclusion_list); |
| 1700 | |
| 1701 | /* Overwrite ret with error_holder if there was an actual error with |
| 1702 | * enabling an event. |
| 1703 | */ |
| 1704 | ret = error_holder ? error_holder : ret; |
| 1705 | |
| 1706 | lttng_event_destroy(ev); |
| 1707 | return ret; |
| 1708 | } |
| 1709 | |
| 1710 | /* |
| 1711 | * Add event to trace session |
| 1712 | */ |
| 1713 | int cmd_enable_events(int argc, const char **argv) |
| 1714 | { |
| 1715 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
| 1716 | static poptContext pc; |
| 1717 | char *session_name = NULL; |
| 1718 | const char *leftover = NULL; |
| 1719 | int event_type = -1; |
| 1720 | |
| 1721 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
| 1722 | poptReadDefaultConfig(pc, 0); |
| 1723 | |
| 1724 | /* Default event type */ |
| 1725 | opt_event_type = LTTNG_EVENT_ALL; |
| 1726 | |
| 1727 | while ((opt = poptGetNextOpt(pc)) != -1) { |
| 1728 | switch (opt) { |
| 1729 | case OPT_HELP: |
| 1730 | SHOW_HELP(); |
| 1731 | goto end; |
| 1732 | case OPT_TRACEPOINT: |
| 1733 | opt_event_type = LTTNG_EVENT_TRACEPOINT; |
| 1734 | break; |
| 1735 | case OPT_PROBE: |
| 1736 | opt_event_type = LTTNG_EVENT_PROBE; |
| 1737 | break; |
| 1738 | case OPT_USERSPACE_PROBE: |
| 1739 | opt_event_type = LTTNG_EVENT_USERSPACE_PROBE; |
| 1740 | break; |
| 1741 | case OPT_FUNCTION: |
| 1742 | opt_event_type = LTTNG_EVENT_FUNCTION; |
| 1743 | break; |
| 1744 | case OPT_SYSCALL: |
| 1745 | opt_event_type = LTTNG_EVENT_SYSCALL; |
| 1746 | break; |
| 1747 | case OPT_USERSPACE: |
| 1748 | opt_userspace = 1; |
| 1749 | break; |
| 1750 | case OPT_LOGLEVEL: |
| 1751 | opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
| 1752 | opt_loglevel = poptGetOptArg(pc); |
| 1753 | break; |
| 1754 | case OPT_LOGLEVEL_ONLY: |
| 1755 | opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
| 1756 | opt_loglevel = poptGetOptArg(pc); |
| 1757 | break; |
| 1758 | case OPT_LIST_OPTIONS: |
| 1759 | list_cmd_options(stdout, long_options); |
| 1760 | goto end; |
| 1761 | case OPT_FILTER: |
| 1762 | break; |
| 1763 | case OPT_EXCLUDE: |
| 1764 | break; |
| 1765 | default: |
| 1766 | ret = CMD_UNDEFINED; |
| 1767 | goto end; |
| 1768 | } |
| 1769 | |
| 1770 | /* Validate event type. Multiple event type are not supported. */ |
| 1771 | if (event_type == -1) { |
| 1772 | event_type = opt_event_type; |
| 1773 | } else { |
| 1774 | if (event_type != opt_event_type) { |
| 1775 | ERR("Multiple event type not supported."); |
| 1776 | ret = CMD_ERROR; |
| 1777 | goto end; |
| 1778 | } |
| 1779 | } |
| 1780 | } |
| 1781 | |
| 1782 | ret = print_missing_or_multiple_domains( |
| 1783 | opt_kernel + opt_userspace + opt_jul + opt_log4j + opt_python); |
| 1784 | if (ret) { |
| 1785 | ret = CMD_ERROR; |
| 1786 | goto end; |
| 1787 | } |
| 1788 | |
| 1789 | /* Mi check */ |
| 1790 | if (lttng_opt_mi) { |
| 1791 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
| 1792 | if (!writer) { |
| 1793 | ret = -LTTNG_ERR_NOMEM; |
| 1794 | goto end; |
| 1795 | } |
| 1796 | |
| 1797 | /* Open command element */ |
| 1798 | ret = mi_lttng_writer_command_open(writer, |
| 1799 | mi_lttng_element_command_enable_event); |
| 1800 | if (ret) { |
| 1801 | ret = CMD_ERROR; |
| 1802 | goto end; |
| 1803 | } |
| 1804 | |
| 1805 | /* Open output element */ |
| 1806 | ret = mi_lttng_writer_open_element(writer, |
| 1807 | mi_lttng_element_command_output); |
| 1808 | if (ret) { |
| 1809 | ret = CMD_ERROR; |
| 1810 | goto end; |
| 1811 | } |
| 1812 | } |
| 1813 | |
| 1814 | opt_event_list = (char*) poptGetArg(pc); |
| 1815 | if (opt_event_list == NULL && opt_enable_all == 0) { |
| 1816 | ERR("Missing event name(s).\n"); |
| 1817 | ret = CMD_ERROR; |
| 1818 | goto end; |
| 1819 | } |
| 1820 | |
| 1821 | leftover = poptGetArg(pc); |
| 1822 | if (leftover) { |
| 1823 | ERR("Unknown argument: %s", leftover); |
| 1824 | ret = CMD_ERROR; |
| 1825 | goto end; |
| 1826 | } |
| 1827 | |
| 1828 | if (!opt_session_name) { |
| 1829 | session_name = get_session_name(); |
| 1830 | if (session_name == NULL) { |
| 1831 | command_ret = CMD_ERROR; |
| 1832 | success = 0; |
| 1833 | goto mi_closing; |
| 1834 | } |
| 1835 | } else { |
| 1836 | session_name = opt_session_name; |
| 1837 | } |
| 1838 | |
| 1839 | command_ret = enable_events(session_name); |
| 1840 | if (command_ret) { |
| 1841 | success = 0; |
| 1842 | goto mi_closing; |
| 1843 | } |
| 1844 | |
| 1845 | mi_closing: |
| 1846 | /* Mi closing */ |
| 1847 | if (lttng_opt_mi) { |
| 1848 | /* Close output element */ |
| 1849 | ret = mi_lttng_writer_close_element(writer); |
| 1850 | if (ret) { |
| 1851 | ret = CMD_ERROR; |
| 1852 | goto end; |
| 1853 | } |
| 1854 | |
| 1855 | ret = mi_lttng_writer_write_element_bool(writer, |
| 1856 | mi_lttng_element_command_success, success); |
| 1857 | if (ret) { |
| 1858 | ret = CMD_ERROR; |
| 1859 | goto end; |
| 1860 | } |
| 1861 | |
| 1862 | /* Command element close */ |
| 1863 | ret = mi_lttng_writer_command_close(writer); |
| 1864 | if (ret) { |
| 1865 | ret = CMD_ERROR; |
| 1866 | goto end; |
| 1867 | } |
| 1868 | } |
| 1869 | |
| 1870 | end: |
| 1871 | /* Mi clean-up */ |
| 1872 | if (writer && mi_lttng_writer_destroy(writer)) { |
| 1873 | /* Preserve original error code */ |
| 1874 | ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL; |
| 1875 | } |
| 1876 | |
| 1877 | if (opt_session_name == NULL) { |
| 1878 | free(session_name); |
| 1879 | } |
| 1880 | |
| 1881 | /* Overwrite ret if an error occurred in enable_events */ |
| 1882 | ret = command_ret ? command_ret : ret; |
| 1883 | |
| 1884 | poptFreeContext(pc); |
| 1885 | return ret; |
| 1886 | } |
| 1887 | |