Add lttng-error.h containing every API err. code
[lttng-tools.git] / src / bin / lttng / commands / enable_events.c
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 = -1;
362 goto error;
363 }
364 } else {
365 ev.loglevel = -1;
366 }
367 }
368
369 ret = lttng_enable_event(handle, &ev, channel_name);
370 if (ret < 0) {
371 switch (-ret) {
372 case LTTNG_ERR_KERN_EVENT_EXIST:
373 WARN("Kernel events already enabled (channel %s, session %s)",
374 channel_name, session_name);
375 break;
376 default:
377 ERR("Events: %s (channel %s, session %s)",
378 lttng_strerror(ret), channel_name, session_name);
379 break;
380 }
381 goto end;
382 }
383 if (opt_filter) {
384 ret = lttng_set_event_filter(handle, ev.name, channel_name,
385 opt_filter);
386 if (ret < 0) {
387 ERR("Error setting filter");
388 ret = -1;
389 goto error;
390 }
391 }
392
393 switch (opt_event_type) {
394 case LTTNG_EVENT_TRACEPOINT:
395 if (opt_loglevel) {
396 MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
397 opt_kernel ? "kernel" : "UST", channel_name,
398 opt_loglevel);
399 } else {
400 MSG("All %s tracepoints are enabled in channel %s",
401 opt_kernel ? "kernel" : "UST", channel_name);
402
403 }
404 break;
405 case LTTNG_EVENT_SYSCALL:
406 if (opt_kernel) {
407 MSG("All kernel system calls are enabled in channel %s",
408 channel_name);
409 }
410 break;
411 case LTTNG_EVENT_ALL:
412 if (opt_loglevel) {
413 MSG("All %s events are enabled in channel %s for loglevel %s",
414 opt_kernel ? "kernel" : "UST", channel_name,
415 opt_loglevel);
416 } else {
417 MSG("All %s events are enabled in channel %s",
418 opt_kernel ? "kernel" : "UST", channel_name);
419 }
420 break;
421 default:
422 /*
423 * We should not be here since lttng_enable_event should have
424 * failed on the event type.
425 */
426 goto error;
427 }
428 goto end;
429 }
430
431 /* Strip event list */
432 event_name = strtok(opt_event_list, ",");
433 while (event_name != NULL) {
434 /* Copy name and type of the event */
435 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
436 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
437 ev.type = opt_event_type;
438
439 /* Kernel tracer action */
440 if (opt_kernel) {
441 DBG("Enabling kernel event %s for channel %s",
442 event_name, channel_name);
443
444 switch (opt_event_type) {
445 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
446 ev.type = LTTNG_EVENT_TRACEPOINT;
447 /* Fall-through */
448 case LTTNG_EVENT_TRACEPOINT:
449 break;
450 case LTTNG_EVENT_PROBE:
451 ret = parse_probe_opts(&ev, opt_probe);
452 if (ret < 0) {
453 ERR("Unable to parse probe options");
454 ret = 0;
455 goto error;
456 }
457 break;
458 case LTTNG_EVENT_FUNCTION:
459 ret = parse_probe_opts(&ev, opt_function);
460 if (ret < 0) {
461 ERR("Unable to parse function probe options");
462 ret = 0;
463 goto error;
464 }
465 break;
466 case LTTNG_EVENT_FUNCTION_ENTRY:
467 strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
468 LTTNG_SYMBOL_NAME_LEN);
469 ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
470 break;
471 case LTTNG_EVENT_SYSCALL:
472 MSG("per-syscall selection not supported yet. Use \"-a\" "
473 "for all syscalls.");
474 default:
475 ret = CMD_UNDEFINED;
476 goto error;
477 }
478
479 if (opt_loglevel) {
480 MSG("Kernel loglevels are not supported.");
481 ret = CMD_UNDEFINED;
482 goto error;
483 }
484
485 /* kernel loglevels not implemented */
486 ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
487 } else if (opt_userspace) { /* User-space tracer action */
488 #if 0
489 if (opt_cmd_name != NULL || opt_pid) {
490 MSG("Only supporting tracing all UST processes (-u) for now.");
491 ret = CMD_UNDEFINED;
492 goto error;
493 }
494 #endif
495
496 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
497 channel_name, opt_loglevel ? : "<all>");
498
499 switch (opt_event_type) {
500 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
501 /* Fall-through */
502 case LTTNG_EVENT_TRACEPOINT:
503 /* Copy name and type of the event */
504 ev.type = LTTNG_EVENT_TRACEPOINT;
505 strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
506 ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
507 break;
508 case LTTNG_EVENT_PROBE:
509 case LTTNG_EVENT_FUNCTION:
510 case LTTNG_EVENT_FUNCTION_ENTRY:
511 case LTTNG_EVENT_SYSCALL:
512 default:
513 ERR("Event type not available for user-space tracing");
514 ret = CMD_UNDEFINED;
515 goto error;
516 }
517
518 ev.loglevel_type = opt_loglevel_type;
519 if (opt_loglevel) {
520 ev.loglevel = loglevel_str_to_value(opt_loglevel);
521 if (ev.loglevel == -1) {
522 ERR("Unknown loglevel %s", opt_loglevel);
523 ret = -1;
524 goto error;
525 }
526 } else {
527 ev.loglevel = -1;
528 }
529 } else {
530 ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
531 ret = CMD_ERROR;
532 goto error;
533 }
534
535 ret = lttng_enable_event(handle, &ev, channel_name);
536 if (ret < 0) {
537 /* Turn ret to positive value to handle the positive error code */
538 switch (-ret) {
539 case LTTNG_ERR_KERN_EVENT_EXIST:
540 WARN("Kernel event %s already enabled (channel %s, session %s)",
541 event_name, channel_name, session_name);
542 break;
543 default:
544 ERR("Event %s: %s (channel %s, session %s)", event_name,
545 lttng_strerror(ret), channel_name, session_name);
546 break;
547 }
548 warn = 1;
549 } else {
550 MSG("%s event %s created in channel %s",
551 opt_kernel ? "kernel": "UST", event_name, channel_name);
552 }
553 if (opt_filter) {
554 ret = lttng_set_event_filter(handle, ev.name,
555 channel_name, opt_filter);
556 if (ret < 0) {
557 ERR("Error setting filter");
558 ret = -1;
559 goto error;
560 }
561 }
562
563 /* Next event */
564 event_name = strtok(NULL, ",");
565 }
566
567 end:
568 error:
569 if (warn) {
570 ret = CMD_WARNING;
571 }
572 if (opt_channel_name == NULL) {
573 free(channel_name);
574 }
575 lttng_destroy_handle(handle);
576
577 return ret;
578 }
579
580 /*
581 * Add event to trace session
582 */
583 int cmd_enable_events(int argc, const char **argv)
584 {
585 int opt, ret = CMD_SUCCESS;
586 static poptContext pc;
587 char *session_name = NULL;
588
589 pc = poptGetContext(NULL, argc, argv, long_options, 0);
590 poptReadDefaultConfig(pc, 0);
591
592 /* Default event type */
593 opt_event_type = LTTNG_EVENT_ALL;
594
595 while ((opt = poptGetNextOpt(pc)) != -1) {
596 switch (opt) {
597 case OPT_HELP:
598 usage(stdout);
599 goto end;
600 case OPT_TRACEPOINT:
601 opt_event_type = LTTNG_EVENT_TRACEPOINT;
602 break;
603 case OPT_PROBE:
604 opt_event_type = LTTNG_EVENT_PROBE;
605 break;
606 case OPT_FUNCTION:
607 opt_event_type = LTTNG_EVENT_FUNCTION;
608 break;
609 case OPT_FUNCTION_ENTRY:
610 opt_event_type = LTTNG_EVENT_FUNCTION_ENTRY;
611 break;
612 case OPT_SYSCALL:
613 opt_event_type = LTTNG_EVENT_SYSCALL;
614 break;
615 case OPT_USERSPACE:
616 opt_userspace = 1;
617 break;
618 case OPT_LOGLEVEL:
619 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
620 opt_loglevel = poptGetOptArg(pc);
621 break;
622 case OPT_LOGLEVEL_ONLY:
623 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
624 opt_loglevel = poptGetOptArg(pc);
625 break;
626 case OPT_LIST_OPTIONS:
627 list_cmd_options(stdout, long_options);
628 goto end;
629 case OPT_FILTER:
630 break;
631 default:
632 usage(stderr);
633 ret = CMD_UNDEFINED;
634 goto end;
635 }
636 }
637
638 opt_event_list = (char*) poptGetArg(pc);
639 if (opt_event_list == NULL && opt_enable_all == 0) {
640 ERR("Missing event name(s).\n");
641 usage(stderr);
642 ret = CMD_ERROR;
643 goto end;
644 }
645
646 if (!opt_session_name) {
647 session_name = get_session_name();
648 if (session_name == NULL) {
649 ret = CMD_ERROR;
650 goto end;
651 }
652 } else {
653 session_name = opt_session_name;
654 }
655
656 ret = enable_events(session_name);
657
658 end:
659 if (opt_session_name == NULL) {
660 free(session_name);
661 }
662
663 poptFreeContext(pc);
664 return ret;
665 }
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