| 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 _GNU_SOURCE |
| 19 | #include <popt.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.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 "../command.h" |
| 30 | #include <src/common/sessiond-comm/sessiond-comm.h> |
| 31 | |
| 32 | static char *opt_event_list; |
| 33 | static int opt_event_type; |
| 34 | static const char *opt_loglevel; |
| 35 | static int opt_loglevel_type; |
| 36 | static int opt_kernel; |
| 37 | static char *opt_session_name; |
| 38 | static int opt_userspace; |
| 39 | static int opt_enable_all; |
| 40 | static char *opt_probe; |
| 41 | static char *opt_function; |
| 42 | static char *opt_function_entry_symbol; |
| 43 | static char *opt_channel_name; |
| 44 | static char *opt_filter; |
| 45 | #if 0 |
| 46 | /* Not implemented yet */ |
| 47 | static char *opt_cmd_name; |
| 48 | static pid_t opt_pid; |
| 49 | #endif |
| 50 | |
| 51 | enum { |
| 52 | OPT_HELP = 1, |
| 53 | OPT_TRACEPOINT, |
| 54 | OPT_PROBE, |
| 55 | OPT_FUNCTION, |
| 56 | OPT_FUNCTION_ENTRY, |
| 57 | OPT_SYSCALL, |
| 58 | OPT_USERSPACE, |
| 59 | OPT_LOGLEVEL, |
| 60 | OPT_LOGLEVEL_ONLY, |
| 61 | OPT_LIST_OPTIONS, |
| 62 | OPT_FILTER, |
| 63 | }; |
| 64 | |
| 65 | static struct lttng_handle *handle; |
| 66 | |
| 67 | static struct poptOption long_options[] = { |
| 68 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ |
| 69 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, |
| 70 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, |
| 71 | {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0}, |
| 72 | {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0}, |
| 73 | {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0}, |
| 74 | {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0}, |
| 75 | {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0}, |
| 76 | {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0}, |
| 77 | {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0}, |
| 78 | #if 0 |
| 79 | /* |
| 80 | * Currently removed from lttng kernel tracer. Removed from |
| 81 | * lttng UI to discourage its use. |
| 82 | */ |
| 83 | {"function:entry", 0, POPT_ARG_STRING, &opt_function_entry_symbol, OPT_FUNCTION_ENTRY, 0, 0}, |
| 84 | #endif |
| 85 | {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0}, |
| 86 | {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0}, |
| 87 | {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0}, |
| 88 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
| 89 | {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0}, |
| 90 | {0, 0, 0, 0, 0, 0, 0} |
| 91 | }; |
| 92 | |
| 93 | /* |
| 94 | * usage |
| 95 | */ |
| 96 | static void usage(FILE *ofp) |
| 97 | { |
| 98 | fprintf(ofp, "usage: lttng enable-event NAME[,NAME2,...] [-k|-u] [OPTIONS] \n"); |
| 99 | fprintf(ofp, "\n"); |
| 100 | fprintf(ofp, "Options:\n"); |
| 101 | fprintf(ofp, " -h, --help Show this help\n"); |
| 102 | fprintf(ofp, " --list-options Simple listing of options\n"); |
| 103 | fprintf(ofp, " -s, --session NAME Apply to session name\n"); |
| 104 | fprintf(ofp, " -c, --channel NAME Apply to this channel\n"); |
| 105 | fprintf(ofp, " -a, --all Enable all tracepoints and syscalls\n"); |
| 106 | fprintf(ofp, " -k, --kernel Apply for the kernel tracer\n"); |
| 107 | fprintf(ofp, " -u, --userspace Apply to the user-space tracer\n"); |
| 108 | fprintf(ofp, "\n"); |
| 109 | fprintf(ofp, "Event options:\n"); |
| 110 | fprintf(ofp, " --tracepoint Tracepoint event (default)\n"); |
| 111 | fprintf(ofp, " - userspace tracer supports wildcards at end of string.\n"); |
| 112 | fprintf(ofp, " Don't forget to quote to deal with bash expansion.\n"); |
| 113 | fprintf(ofp, " e.g.:\n"); |
| 114 | fprintf(ofp, " \"*\"\n"); |
| 115 | fprintf(ofp, " \"app_component:na*\"\n"); |
| 116 | fprintf(ofp, " --probe [addr | symbol | symbol+offset]\n"); |
| 117 | fprintf(ofp, " Dynamic probe.\n"); |
| 118 | fprintf(ofp, " Addr and offset can be octal (0NNN...),\n"); |
| 119 | fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n"); |
| 120 | fprintf(ofp, " --function [addr | symbol | symbol+offset]\n"); |
| 121 | fprintf(ofp, " Dynamic function entry/return probe.\n"); |
| 122 | fprintf(ofp, " Addr and offset can be octal (0NNN...),\n"); |
| 123 | fprintf(ofp, " decimal (NNN...) or hexadecimal (0xNNN...)\n"); |
| 124 | #if 0 |
| 125 | fprintf(ofp, " --function:entry symbol\n"); |
| 126 | fprintf(ofp, " Function tracer event\n"); |
| 127 | #endif |
| 128 | fprintf(ofp, " --syscall System call event\n"); |
| 129 | fprintf(ofp, "\n"); |
| 130 | fprintf(ofp, " --loglevel name\n"); |
| 131 | fprintf(ofp, " Tracepoint loglevel range from 0 to loglevel\n"); |
| 132 | fprintf(ofp, " --loglevel-only name\n"); |
| 133 | fprintf(ofp, " Tracepoint loglevel (only this loglevel)\n"); |
| 134 | fprintf(ofp, "\n"); |
| 135 | fprintf(ofp, " The loglevel or loglevel-only options should be\n"); |
| 136 | fprintf(ofp, " combined with a tracepoint name or tracepoint\n"); |
| 137 | fprintf(ofp, " wildcard.\n"); |
| 138 | fprintf(ofp, " Available loglevels:\n"); |
| 139 | fprintf(ofp, " (higher value is more verbose)\n"); |
| 140 | fprintf(ofp, " TRACE_EMERG = 0\n"); |
| 141 | fprintf(ofp, " TRACE_ALERT = 1\n"); |
| 142 | fprintf(ofp, " TRACE_CRIT = 2\n"); |
| 143 | fprintf(ofp, " TRACE_ERR = 3\n"); |
| 144 | fprintf(ofp, " TRACE_WARNING = 4\n"); |
| 145 | fprintf(ofp, " TRACE_NOTICE = 5\n"); |
| 146 | fprintf(ofp, " TRACE_INFO = 6\n"); |
| 147 | fprintf(ofp, " TRACE_DEBUG_SYSTEM = 7\n"); |
| 148 | fprintf(ofp, " TRACE_DEBUG_PROGRAM = 8\n"); |
| 149 | fprintf(ofp, " TRACE_DEBUG_PROCESS = 9\n"); |
| 150 | fprintf(ofp, " TRACE_DEBUG_MODULE = 10\n"); |
| 151 | fprintf(ofp, " TRACE_DEBUG_UNIT = 11\n"); |
| 152 | fprintf(ofp, " TRACE_DEBUG_FUNCTION = 12\n"); |
| 153 | fprintf(ofp, " TRACE_DEBUG_LINE = 13\n"); |
| 154 | fprintf(ofp, " TRACE_DEBUG = 14\n"); |
| 155 | fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n"); |
| 156 | fprintf(ofp, " --filter \'expression\'\n"); |
| 157 | fprintf(ofp, " Filter expression on event fields,\n"); |
| 158 | fprintf(ofp, " event recording depends on evaluation.\n"); |
| 159 | fprintf(ofp, " Only specify on first activation of\n"); |
| 160 | fprintf(ofp, " a given event within a session.\n"); |
| 161 | fprintf(ofp, " Filter only allowed when enabling\n"); |
| 162 | fprintf(ofp, " events within a session before tracing\n"); |
| 163 | fprintf(ofp, " is started. If the filter fails to link\n"); |
| 164 | fprintf(ofp, " with the event within the traced domain,\n"); |
| 165 | fprintf(ofp, " the event will be discarded. Currently,\n"); |
| 166 | fprintf(ofp, " filter is only implemented for the user-space\n"); |
| 167 | fprintf(ofp, " tracer.\n"); |
| 168 | fprintf(ofp, " Expression examples:.\n"); |
| 169 | fprintf(ofp, " \n"); |
| 170 | fprintf(ofp, " 'intfield > 500 && intfield < 503'\n"); |
| 171 | fprintf(ofp, " '(stringfield == \"test\" || intfield != 10) && intfield > 33'\n"); |
| 172 | fprintf(ofp, " 'doublefield > 1.1 && intfield < 5.3'\n"); |
| 173 | fprintf(ofp, " \n"); |
| 174 | fprintf(ofp, " Wildcards are allowed at the end of strings:\n"); |
| 175 | fprintf(ofp, " 'seqfield1 == \"te*\"'\n"); |
| 176 | fprintf(ofp, " In string literals, the escape character is '\\'.\n"); |
| 177 | fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n"); |
| 178 | fprintf(ofp, " the '\\' character.\n"); |
| 179 | fprintf(ofp, "\n"); |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | * Parse probe options. |
| 184 | */ |
| 185 | static int parse_probe_opts(struct lttng_event *ev, char *opt) |
| 186 | { |
| 187 | int ret; |
| 188 | char s_hex[19]; |
| 189 | char name[LTTNG_SYMBOL_NAME_LEN]; |
| 190 | |
| 191 | if (opt == NULL) { |
| 192 | ret = -1; |
| 193 | goto end; |
| 194 | } |
| 195 | |
| 196 | /* Check for symbol+offset */ |
| 197 | ret = sscanf(opt, "%[^'+']+%s", name, s_hex); |
| 198 | if (ret == 2) { |
| 199 | strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN); |
| 200 | ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 201 | DBG("probe symbol %s", ev->attr.probe.symbol_name); |
| 202 | if (strlen(s_hex) == 0) { |
| 203 | ERR("Invalid probe offset %s", s_hex); |
| 204 | ret = -1; |
| 205 | goto end; |
| 206 | } |
| 207 | ev->attr.probe.offset = strtoul(s_hex, NULL, 0); |
| 208 | DBG("probe offset %" PRIu64, ev->attr.probe.offset); |
| 209 | ev->attr.probe.addr = 0; |
| 210 | goto end; |
| 211 | } |
| 212 | |
| 213 | /* Check for symbol */ |
| 214 | if (isalpha(name[0])) { |
| 215 | ret = sscanf(opt, "%s", name); |
| 216 | if (ret == 1) { |
| 217 | strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN); |
| 218 | ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 219 | DBG("probe symbol %s", ev->attr.probe.symbol_name); |
| 220 | ev->attr.probe.offset = 0; |
| 221 | DBG("probe offset %" PRIu64, ev->attr.probe.offset); |
| 222 | ev->attr.probe.addr = 0; |
| 223 | goto end; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /* Check for address */ |
| 228 | ret = sscanf(opt, "%s", s_hex); |
| 229 | if (ret > 0) { |
| 230 | if (strlen(s_hex) == 0) { |
| 231 | ERR("Invalid probe address %s", s_hex); |
| 232 | ret = -1; |
| 233 | goto end; |
| 234 | } |
| 235 | ev->attr.probe.addr = strtoul(s_hex, NULL, 0); |
| 236 | DBG("probe addr %" PRIu64, ev->attr.probe.addr); |
| 237 | ev->attr.probe.offset = 0; |
| 238 | memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN); |
| 239 | goto end; |
| 240 | } |
| 241 | |
| 242 | /* No match */ |
| 243 | ret = -1; |
| 244 | |
| 245 | end: |
| 246 | return ret; |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * Maps loglevel from string to value |
| 251 | */ |
| 252 | static |
| 253 | int loglevel_str_to_value(const char *inputstr) |
| 254 | { |
| 255 | int i = 0; |
| 256 | char str[LTTNG_SYMBOL_NAME_LEN]; |
| 257 | |
| 258 | while (inputstr[i] != '\0' && i < LTTNG_SYMBOL_NAME_LEN) { |
| 259 | str[i] = toupper(inputstr[i]); |
| 260 | i++; |
| 261 | } |
| 262 | str[i] = '\0'; |
| 263 | if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) { |
| 264 | return LTTNG_LOGLEVEL_EMERG; |
| 265 | } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) { |
| 266 | return LTTNG_LOGLEVEL_ALERT; |
| 267 | } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) { |
| 268 | return LTTNG_LOGLEVEL_CRIT; |
| 269 | } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) { |
| 270 | return LTTNG_LOGLEVEL_ERR; |
| 271 | } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) { |
| 272 | return LTTNG_LOGLEVEL_WARNING; |
| 273 | } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) { |
| 274 | return LTTNG_LOGLEVEL_NOTICE; |
| 275 | } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) { |
| 276 | return LTTNG_LOGLEVEL_INFO; |
| 277 | } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) { |
| 278 | return LTTNG_LOGLEVEL_DEBUG_SYSTEM; |
| 279 | } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) { |
| 280 | return LTTNG_LOGLEVEL_DEBUG_PROGRAM; |
| 281 | } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) { |
| 282 | return LTTNG_LOGLEVEL_DEBUG_PROCESS; |
| 283 | } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) { |
| 284 | return LTTNG_LOGLEVEL_DEBUG_MODULE; |
| 285 | } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) { |
| 286 | return LTTNG_LOGLEVEL_DEBUG_UNIT; |
| 287 | } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) { |
| 288 | return LTTNG_LOGLEVEL_DEBUG_FUNCTION; |
| 289 | } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) { |
| 290 | return LTTNG_LOGLEVEL_DEBUG_LINE; |
| 291 | } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) { |
| 292 | return LTTNG_LOGLEVEL_DEBUG; |
| 293 | } else { |
| 294 | return -1; |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * Enabling event using the lttng API. |
| 300 | */ |
| 301 | static int enable_events(char *session_name) |
| 302 | { |
| 303 | int err, ret = CMD_SUCCESS, warn = 0; |
| 304 | char *event_name, *channel_name = NULL; |
| 305 | struct lttng_event ev; |
| 306 | struct lttng_domain dom; |
| 307 | |
| 308 | memset(&ev, 0, sizeof(ev)); |
| 309 | memset(&dom, 0, sizeof(dom)); |
| 310 | |
| 311 | if (opt_kernel) { |
| 312 | if (opt_filter) { |
| 313 | ERR("Filter not implement for kernel tracing yet"); |
| 314 | ret = CMD_ERROR; |
| 315 | goto error; |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | /* Create lttng domain */ |
| 320 | if (opt_kernel) { |
| 321 | dom.type = LTTNG_DOMAIN_KERNEL; |
| 322 | } else if (opt_userspace) { |
| 323 | dom.type = LTTNG_DOMAIN_UST; |
| 324 | } else { |
| 325 | ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); |
| 326 | ret = CMD_ERROR; |
| 327 | goto error; |
| 328 | } |
| 329 | |
| 330 | if (opt_channel_name == NULL) { |
| 331 | err = asprintf(&channel_name, DEFAULT_CHANNEL_NAME); |
| 332 | if (err < 0) { |
| 333 | ret = CMD_FATAL; |
| 334 | goto error; |
| 335 | } |
| 336 | } else { |
| 337 | channel_name = opt_channel_name; |
| 338 | } |
| 339 | |
| 340 | handle = lttng_create_handle(session_name, &dom); |
| 341 | if (handle == NULL) { |
| 342 | ret = -1; |
| 343 | goto error; |
| 344 | } |
| 345 | |
| 346 | if (opt_enable_all) { |
| 347 | /* Default setup for enable all */ |
| 348 | if (opt_kernel) { |
| 349 | ev.type = opt_event_type; |
| 350 | ev.name[0] = '\0'; |
| 351 | /* kernel loglevels not implemented */ |
| 352 | ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
| 353 | } else { |
| 354 | ev.type = LTTNG_EVENT_TRACEPOINT; |
| 355 | strcpy(ev.name, "*"); |
| 356 | ev.loglevel_type = opt_loglevel_type; |
| 357 | if (opt_loglevel) { |
| 358 | ev.loglevel = loglevel_str_to_value(opt_loglevel); |
| 359 | if (ev.loglevel == -1) { |
| 360 | ERR("Unknown loglevel %s", opt_loglevel); |
| 361 | ret = -LTTNG_ERR_INVALID; |
| 362 | goto error; |
| 363 | } |
| 364 | } else { |
| 365 | ev.loglevel = -1; |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | if (!opt_filter) { |
| 370 | ret = lttng_enable_event(handle, &ev, channel_name); |
| 371 | if (ret < 0) { |
| 372 | switch (-ret) { |
| 373 | case LTTNG_ERR_KERN_EVENT_EXIST: |
| 374 | WARN("Kernel events already enabled (channel %s, session %s)", |
| 375 | channel_name, session_name); |
| 376 | break; |
| 377 | default: |
| 378 | ERR("Events: %s (channel %s, session %s)", |
| 379 | lttng_strerror(ret), channel_name, session_name); |
| 380 | break; |
| 381 | } |
| 382 | goto end; |
| 383 | } |
| 384 | |
| 385 | switch (opt_event_type) { |
| 386 | case LTTNG_EVENT_TRACEPOINT: |
| 387 | if (opt_loglevel) { |
| 388 | MSG("All %s tracepoints are enabled in channel %s for loglevel %s", |
| 389 | opt_kernel ? "kernel" : "UST", channel_name, |
| 390 | opt_loglevel); |
| 391 | } else { |
| 392 | MSG("All %s tracepoints are enabled in channel %s", |
| 393 | opt_kernel ? "kernel" : "UST", channel_name); |
| 394 | |
| 395 | } |
| 396 | break; |
| 397 | case LTTNG_EVENT_SYSCALL: |
| 398 | if (opt_kernel) { |
| 399 | MSG("All kernel system calls are enabled in channel %s", |
| 400 | channel_name); |
| 401 | } |
| 402 | break; |
| 403 | case LTTNG_EVENT_ALL: |
| 404 | if (opt_loglevel) { |
| 405 | MSG("All %s events are enabled in channel %s for loglevel %s", |
| 406 | opt_kernel ? "kernel" : "UST", channel_name, |
| 407 | opt_loglevel); |
| 408 | } else { |
| 409 | MSG("All %s events are enabled in channel %s", |
| 410 | opt_kernel ? "kernel" : "UST", channel_name); |
| 411 | } |
| 412 | break; |
| 413 | default: |
| 414 | /* |
| 415 | * We should not be here since lttng_enable_event should have |
| 416 | * failed on the event type. |
| 417 | */ |
| 418 | goto error; |
| 419 | } |
| 420 | } |
| 421 | if (opt_filter) { |
| 422 | ret = lttng_enable_event_with_filter(handle, &ev, channel_name, |
| 423 | opt_filter); |
| 424 | if (ret < 0) { |
| 425 | fprintf(stderr, "Ret filter: %d\n", ret); |
| 426 | switch (-ret) { |
| 427 | case LTTNG_ERR_FILTER_EXIST: |
| 428 | WARN("Filter on events is already enabled" |
| 429 | " (channel %s, session %s)", |
| 430 | channel_name, session_name); |
| 431 | break; |
| 432 | case LTTNG_ERR_FILTER_INVAL: |
| 433 | case LTTNG_ERR_FILTER_NOMEM: |
| 434 | ERR("%s", lttng_strerror(ret)); |
| 435 | default: |
| 436 | ERR("Setting filter: '%s'", opt_filter); |
| 437 | break; |
| 438 | } |
| 439 | goto error; |
| 440 | } else { |
| 441 | MSG("Filter '%s' successfully set", opt_filter); |
| 442 | } |
| 443 | } |
| 444 | goto end; |
| 445 | } |
| 446 | |
| 447 | /* Strip event list */ |
| 448 | event_name = strtok(opt_event_list, ","); |
| 449 | while (event_name != NULL) { |
| 450 | /* Copy name and type of the event */ |
| 451 | strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN); |
| 452 | ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 453 | ev.type = opt_event_type; |
| 454 | |
| 455 | /* Kernel tracer action */ |
| 456 | if (opt_kernel) { |
| 457 | DBG("Enabling kernel event %s for channel %s", |
| 458 | event_name, channel_name); |
| 459 | |
| 460 | switch (opt_event_type) { |
| 461 | case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */ |
| 462 | ev.type = LTTNG_EVENT_TRACEPOINT; |
| 463 | /* Fall-through */ |
| 464 | case LTTNG_EVENT_TRACEPOINT: |
| 465 | break; |
| 466 | case LTTNG_EVENT_PROBE: |
| 467 | ret = parse_probe_opts(&ev, opt_probe); |
| 468 | if (ret < 0) { |
| 469 | ERR("Unable to parse probe options"); |
| 470 | ret = 0; |
| 471 | goto error; |
| 472 | } |
| 473 | break; |
| 474 | case LTTNG_EVENT_FUNCTION: |
| 475 | ret = parse_probe_opts(&ev, opt_function); |
| 476 | if (ret < 0) { |
| 477 | ERR("Unable to parse function probe options"); |
| 478 | ret = 0; |
| 479 | goto error; |
| 480 | } |
| 481 | break; |
| 482 | case LTTNG_EVENT_FUNCTION_ENTRY: |
| 483 | strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol, |
| 484 | LTTNG_SYMBOL_NAME_LEN); |
| 485 | ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 486 | break; |
| 487 | case LTTNG_EVENT_SYSCALL: |
| 488 | MSG("per-syscall selection not supported yet. Use \"-a\" " |
| 489 | "for all syscalls."); |
| 490 | default: |
| 491 | ret = CMD_UNDEFINED; |
| 492 | goto error; |
| 493 | } |
| 494 | |
| 495 | if (opt_loglevel) { |
| 496 | MSG("Kernel loglevels are not supported."); |
| 497 | ret = CMD_UNDEFINED; |
| 498 | goto error; |
| 499 | } |
| 500 | |
| 501 | /* kernel loglevels not implemented */ |
| 502 | ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
| 503 | } else if (opt_userspace) { /* User-space tracer action */ |
| 504 | #if 0 |
| 505 | if (opt_cmd_name != NULL || opt_pid) { |
| 506 | MSG("Only supporting tracing all UST processes (-u) for now."); |
| 507 | ret = CMD_UNDEFINED; |
| 508 | goto error; |
| 509 | } |
| 510 | #endif |
| 511 | |
| 512 | DBG("Enabling UST event %s for channel %s, loglevel %s", event_name, |
| 513 | channel_name, opt_loglevel ? : "<all>"); |
| 514 | |
| 515 | switch (opt_event_type) { |
| 516 | case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */ |
| 517 | /* Fall-through */ |
| 518 | case LTTNG_EVENT_TRACEPOINT: |
| 519 | /* Copy name and type of the event */ |
| 520 | ev.type = LTTNG_EVENT_TRACEPOINT; |
| 521 | strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN); |
| 522 | ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
| 523 | break; |
| 524 | case LTTNG_EVENT_PROBE: |
| 525 | case LTTNG_EVENT_FUNCTION: |
| 526 | case LTTNG_EVENT_FUNCTION_ENTRY: |
| 527 | case LTTNG_EVENT_SYSCALL: |
| 528 | default: |
| 529 | ERR("Event type not available for user-space tracing"); |
| 530 | ret = CMD_UNDEFINED; |
| 531 | goto error; |
| 532 | } |
| 533 | |
| 534 | ev.loglevel_type = opt_loglevel_type; |
| 535 | if (opt_loglevel) { |
| 536 | ev.loglevel = loglevel_str_to_value(opt_loglevel); |
| 537 | if (ev.loglevel == -1) { |
| 538 | ERR("Unknown loglevel %s", opt_loglevel); |
| 539 | ret = -LTTNG_ERR_INVALID; |
| 540 | goto error; |
| 541 | } |
| 542 | } else { |
| 543 | ev.loglevel = -1; |
| 544 | } |
| 545 | } else { |
| 546 | ERR("Please specify a tracer (-k/--kernel or -u/--userspace)"); |
| 547 | ret = CMD_ERROR; |
| 548 | goto error; |
| 549 | } |
| 550 | |
| 551 | if (!opt_filter) { |
| 552 | ret = lttng_enable_event(handle, &ev, channel_name); |
| 553 | if (ret < 0) { |
| 554 | /* Turn ret to positive value to handle the positive error code */ |
| 555 | switch (-ret) { |
| 556 | case LTTNG_ERR_KERN_EVENT_EXIST: |
| 557 | WARN("Kernel event %s already enabled (channel %s, session %s)", |
| 558 | event_name, channel_name, session_name); |
| 559 | break; |
| 560 | default: |
| 561 | ERR("Event %s: %s (channel %s, session %s)", event_name, |
| 562 | lttng_strerror(ret), channel_name, session_name); |
| 563 | break; |
| 564 | } |
| 565 | warn = 1; |
| 566 | } else { |
| 567 | MSG("%s event %s created in channel %s", |
| 568 | opt_kernel ? "kernel": "UST", event_name, channel_name); |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | if (opt_filter) { |
| 573 | ret = lttng_enable_event_with_filter(handle, &ev, channel_name, |
| 574 | opt_filter); |
| 575 | if (ret < 0) { |
| 576 | switch (-ret) { |
| 577 | case LTTNG_ERR_FILTER_EXIST: |
| 578 | WARN("Filter on event %s is already enabled" |
| 579 | " (channel %s, session %s)", |
| 580 | event_name, channel_name, session_name); |
| 581 | break; |
| 582 | case LTTNG_ERR_FILTER_INVAL: |
| 583 | case LTTNG_ERR_FILTER_NOMEM: |
| 584 | ERR("%s", lttng_strerror(ret)); |
| 585 | default: |
| 586 | ERR("Setting filter for event %s: '%s'", ev.name, |
| 587 | opt_filter); |
| 588 | break; |
| 589 | } |
| 590 | goto error; |
| 591 | } else { |
| 592 | MSG("Filter '%s' successfully set", opt_filter); |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | /* Next event */ |
| 597 | event_name = strtok(NULL, ","); |
| 598 | } |
| 599 | |
| 600 | end: |
| 601 | error: |
| 602 | if (warn) { |
| 603 | ret = CMD_WARNING; |
| 604 | } |
| 605 | if (opt_channel_name == NULL) { |
| 606 | free(channel_name); |
| 607 | } |
| 608 | lttng_destroy_handle(handle); |
| 609 | |
| 610 | return ret; |
| 611 | } |
| 612 | |
| 613 | /* |
| 614 | * Add event to trace session |
| 615 | */ |
| 616 | int cmd_enable_events(int argc, const char **argv) |
| 617 | { |
| 618 | int opt, ret = CMD_SUCCESS; |
| 619 | static poptContext pc; |
| 620 | char *session_name = NULL; |
| 621 | |
| 622 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
| 623 | poptReadDefaultConfig(pc, 0); |
| 624 | |
| 625 | /* Default event type */ |
| 626 | opt_event_type = LTTNG_EVENT_ALL; |
| 627 | |
| 628 | while ((opt = poptGetNextOpt(pc)) != -1) { |
| 629 | switch (opt) { |
| 630 | case OPT_HELP: |
| 631 | usage(stdout); |
| 632 | goto end; |
| 633 | case OPT_TRACEPOINT: |
| 634 | opt_event_type = LTTNG_EVENT_TRACEPOINT; |
| 635 | break; |
| 636 | case OPT_PROBE: |
| 637 | opt_event_type = LTTNG_EVENT_PROBE; |
| 638 | break; |
| 639 | case OPT_FUNCTION: |
| 640 | opt_event_type = LTTNG_EVENT_FUNCTION; |
| 641 | break; |
| 642 | case OPT_FUNCTION_ENTRY: |
| 643 | opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY; |
| 644 | break; |
| 645 | case OPT_SYSCALL: |
| 646 | opt_event_type = LTTNG_EVENT_SYSCALL; |
| 647 | break; |
| 648 | case OPT_USERSPACE: |
| 649 | opt_userspace = 1; |
| 650 | break; |
| 651 | case OPT_LOGLEVEL: |
| 652 | opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
| 653 | opt_loglevel = poptGetOptArg(pc); |
| 654 | break; |
| 655 | case OPT_LOGLEVEL_ONLY: |
| 656 | opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
| 657 | opt_loglevel = poptGetOptArg(pc); |
| 658 | break; |
| 659 | case OPT_LIST_OPTIONS: |
| 660 | list_cmd_options(stdout, long_options); |
| 661 | goto end; |
| 662 | case OPT_FILTER: |
| 663 | break; |
| 664 | default: |
| 665 | usage(stderr); |
| 666 | ret = CMD_UNDEFINED; |
| 667 | goto end; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | opt_event_list = (char*) poptGetArg(pc); |
| 672 | if (opt_event_list == NULL && opt_enable_all == 0) { |
| 673 | ERR("Missing event name(s).\n"); |
| 674 | usage(stderr); |
| 675 | ret = CMD_ERROR; |
| 676 | goto end; |
| 677 | } |
| 678 | |
| 679 | if (!opt_session_name) { |
| 680 | session_name = get_session_name(); |
| 681 | if (session_name == NULL) { |
| 682 | ret = CMD_ERROR; |
| 683 | goto end; |
| 684 | } |
| 685 | } else { |
| 686 | session_name = opt_session_name; |
| 687 | } |
| 688 | |
| 689 | ret = enable_events(session_name); |
| 690 | |
| 691 | end: |
| 692 | if (opt_session_name == NULL) { |
| 693 | free(session_name); |
| 694 | } |
| 695 | |
| 696 | poptFreeContext(pc); |
| 697 | return ret; |
| 698 | } |