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