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Use lttng_event_{create, destroy} to manage lttng_event struct
[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 _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/string-utils/string-utils.h>
32
33 /* Mi dependancy */
34 #include <common/mi-lttng.h>
35
36 #include "../command.h"
37
38 #if (LTTNG_SYMBOL_NAME_LEN == 256)
39 #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255"
40 #endif
41
42 static char *opt_event_list;
43 static int opt_event_type;
44 static const char *opt_loglevel;
45 static int opt_loglevel_type;
46 static int opt_kernel;
47 static char *opt_session_name;
48 static int opt_userspace;
49 static int opt_jul;
50 static int opt_log4j;
51 static int opt_python;
52 static int opt_enable_all;
53 static char *opt_probe;
54 static char *opt_function;
55 static char *opt_channel_name;
56 static char *opt_filter;
57 static char *opt_exclude;
58
59 #ifdef LTTNG_EMBED_HELP
60 static const char help_msg[] =
61 #include <lttng-enable-event.1.h>
62 ;
63 #endif
64
65 enum {
66 OPT_HELP = 1,
67 OPT_TRACEPOINT,
68 OPT_PROBE,
69 OPT_FUNCTION,
70 OPT_SYSCALL,
71 OPT_USERSPACE,
72 OPT_LOGLEVEL,
73 OPT_LOGLEVEL_ONLY,
74 OPT_LIST_OPTIONS,
75 OPT_FILTER,
76 OPT_EXCLUDE,
77 };
78
79 static struct lttng_handle *handle;
80 static struct mi_writer *writer;
81
82 static struct poptOption long_options[] = {
83 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
84 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
85 {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0},
86 {"all", 'a', POPT_ARG_VAL, &opt_enable_all, 1, 0, 0},
87 {"channel", 'c', POPT_ARG_STRING, &opt_channel_name, 0, 0, 0},
88 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
89 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
90 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
91 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
92 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
93 {"tracepoint", 0, POPT_ARG_NONE, 0, OPT_TRACEPOINT, 0, 0},
94 {"probe", 0, POPT_ARG_STRING, &opt_probe, OPT_PROBE, 0, 0},
95 {"function", 0, POPT_ARG_STRING, &opt_function, OPT_FUNCTION, 0, 0},
96 {"syscall", 0, POPT_ARG_NONE, 0, OPT_SYSCALL, 0, 0},
97 {"loglevel", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL, 0, 0},
98 {"loglevel-only", 0, POPT_ARG_STRING, 0, OPT_LOGLEVEL_ONLY, 0, 0},
99 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
100 {"filter", 'f', POPT_ARG_STRING, &opt_filter, OPT_FILTER, 0, 0},
101 {"exclude", 'x', POPT_ARG_STRING, &opt_exclude, OPT_EXCLUDE, 0, 0},
102 {0, 0, 0, 0, 0, 0, 0}
103 };
104
105 /*
106 * Parse probe options.
107 */
108 static int parse_probe_opts(struct lttng_event *ev, char *opt)
109 {
110 int ret = CMD_SUCCESS;
111 int match;
112 char s_hex[19];
113 #define S_HEX_LEN_SCANF_IS_A_BROKEN_API "18" /* 18 is (19 - 1) (\0 is extra) */
114 char name[LTTNG_SYMBOL_NAME_LEN];
115
116 if (opt == NULL) {
117 ret = CMD_ERROR;
118 goto end;
119 }
120
121 /* Check for symbol+offset */
122 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API
123 "[^'+']+%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", name, s_hex);
124 if (match == 2) {
125 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
126 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
127 DBG("probe symbol %s", ev->attr.probe.symbol_name);
128 if (*s_hex == '\0') {
129 ERR("Invalid probe offset %s", s_hex);
130 ret = CMD_ERROR;
131 goto end;
132 }
133 ev->attr.probe.offset = strtoul(s_hex, NULL, 0);
134 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
135 ev->attr.probe.addr = 0;
136 goto end;
137 }
138
139 /* Check for symbol */
140 if (isalpha(name[0])) {
141 match = sscanf(opt, "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "s",
142 name);
143 if (match == 1) {
144 strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
145 ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
146 DBG("probe symbol %s", ev->attr.probe.symbol_name);
147 ev->attr.probe.offset = 0;
148 DBG("probe offset %" PRIu64, ev->attr.probe.offset);
149 ev->attr.probe.addr = 0;
150 goto end;
151 }
152 }
153
154 /* Check for address */
155 match = sscanf(opt, "%" S_HEX_LEN_SCANF_IS_A_BROKEN_API "s", s_hex);
156 if (match > 0) {
157 if (*s_hex == '\0') {
158 ERR("Invalid probe address %s", s_hex);
159 ret = CMD_ERROR;
160 goto end;
161 }
162 ev->attr.probe.addr = strtoul(s_hex, NULL, 0);
163 DBG("probe addr %" PRIu64, ev->attr.probe.addr);
164 ev->attr.probe.offset = 0;
165 memset(ev->attr.probe.symbol_name, 0, LTTNG_SYMBOL_NAME_LEN);
166 goto end;
167 }
168
169 /* No match */
170 ret = CMD_ERROR;
171
172 end:
173 return ret;
174 }
175
176 /*
177 * Maps LOG4j loglevel from string to value
178 */
179 static int loglevel_log4j_str_to_value(const char *inputstr)
180 {
181 int i = 0;
182 char str[LTTNG_SYMBOL_NAME_LEN];
183
184 if (!inputstr || strlen(inputstr) == 0) {
185 return -1;
186 }
187
188 /*
189 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
190 * added at the end of the loop so a the upper bound we avoid the overflow.
191 */
192 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
193 str[i] = toupper(inputstr[i]);
194 i++;
195 }
196 str[i] = '\0';
197
198 if (!strcmp(str, "LOG4J_OFF") || !strcmp(str, "OFF")) {
199 return LTTNG_LOGLEVEL_LOG4J_OFF;
200 } else if (!strcmp(str, "LOG4J_FATAL") || !strcmp(str, "FATAL")) {
201 return LTTNG_LOGLEVEL_LOG4J_FATAL;
202 } else if (!strcmp(str, "LOG4J_ERROR") || !strcmp(str, "ERROR")) {
203 return LTTNG_LOGLEVEL_LOG4J_ERROR;
204 } else if (!strcmp(str, "LOG4J_WARN") || !strcmp(str, "WARN")) {
205 return LTTNG_LOGLEVEL_LOG4J_WARN;
206 } else if (!strcmp(str, "LOG4J_INFO") || !strcmp(str, "INFO")) {
207 return LTTNG_LOGLEVEL_LOG4J_INFO;
208 } else if (!strcmp(str, "LOG4J_DEBUG") || !strcmp(str, "DEBUG")) {
209 return LTTNG_LOGLEVEL_LOG4J_DEBUG;
210 } else if (!strcmp(str, "LOG4J_TRACE") || !strcmp(str, "TRACE")) {
211 return LTTNG_LOGLEVEL_LOG4J_TRACE;
212 } else if (!strcmp(str, "LOG4J_ALL") || !strcmp(str, "ALL")) {
213 return LTTNG_LOGLEVEL_LOG4J_ALL;
214 } else {
215 return -1;
216 }
217 }
218
219 /*
220 * Maps JUL loglevel from string to value
221 */
222 static int loglevel_jul_str_to_value(const char *inputstr)
223 {
224 int i = 0;
225 char str[LTTNG_SYMBOL_NAME_LEN];
226
227 if (!inputstr || strlen(inputstr) == 0) {
228 return -1;
229 }
230
231 /*
232 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
233 * added at the end of the loop so a the upper bound we avoid the overflow.
234 */
235 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
236 str[i] = toupper(inputstr[i]);
237 i++;
238 }
239 str[i] = '\0';
240
241 if (!strcmp(str, "JUL_OFF") || !strcmp(str, "OFF")) {
242 return LTTNG_LOGLEVEL_JUL_OFF;
243 } else if (!strcmp(str, "JUL_SEVERE") || !strcmp(str, "SEVERE")) {
244 return LTTNG_LOGLEVEL_JUL_SEVERE;
245 } else if (!strcmp(str, "JUL_WARNING") || !strcmp(str, "WARNING")) {
246 return LTTNG_LOGLEVEL_JUL_WARNING;
247 } else if (!strcmp(str, "JUL_INFO") || !strcmp(str, "INFO")) {
248 return LTTNG_LOGLEVEL_JUL_INFO;
249 } else if (!strcmp(str, "JUL_CONFIG") || !strcmp(str, "CONFIG")) {
250 return LTTNG_LOGLEVEL_JUL_CONFIG;
251 } else if (!strcmp(str, "JUL_FINE") || !strcmp(str, "FINE")) {
252 return LTTNG_LOGLEVEL_JUL_FINE;
253 } else if (!strcmp(str, "JUL_FINER") || !strcmp(str, "FINER")) {
254 return LTTNG_LOGLEVEL_JUL_FINER;
255 } else if (!strcmp(str, "JUL_FINEST") || !strcmp(str, "FINEST")) {
256 return LTTNG_LOGLEVEL_JUL_FINEST;
257 } else if (!strcmp(str, "JUL_ALL") || !strcmp(str, "ALL")) {
258 return LTTNG_LOGLEVEL_JUL_ALL;
259 } else {
260 return -1;
261 }
262 }
263
264 /*
265 * Maps Python loglevel from string to value
266 */
267 static int loglevel_python_str_to_value(const char *inputstr)
268 {
269 int i = 0;
270 char str[LTTNG_SYMBOL_NAME_LEN];
271
272 if (!inputstr || strlen(inputstr) == 0) {
273 return -1;
274 }
275
276 /*
277 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
278 * added at the end of the loop so a the upper bound we avoid the overflow.
279 */
280 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
281 str[i] = toupper(inputstr[i]);
282 i++;
283 }
284 str[i] = '\0';
285
286 if (!strcmp(str, "PYTHON_CRITICAL") || !strcmp(str, "CRITICAL")) {
287 return LTTNG_LOGLEVEL_PYTHON_CRITICAL;
288 } else if (!strcmp(str, "PYTHON_ERROR") || !strcmp(str, "ERROR")) {
289 return LTTNG_LOGLEVEL_PYTHON_ERROR;
290 } else if (!strcmp(str, "PYTHON_WARNING") || !strcmp(str, "WARNING")) {
291 return LTTNG_LOGLEVEL_PYTHON_WARNING;
292 } else if (!strcmp(str, "PYTHON_INFO") || !strcmp(str, "INFO")) {
293 return LTTNG_LOGLEVEL_PYTHON_INFO;
294 } else if (!strcmp(str, "PYTNON_DEBUG") || !strcmp(str, "DEBUG")) {
295 return LTTNG_LOGLEVEL_PYTHON_DEBUG;
296 } else if (!strcmp(str, "PYTHON_NOTSET") || !strcmp(str, "NOTSET")) {
297 return LTTNG_LOGLEVEL_PYTHON_NOTSET;
298 } else {
299 return -1;
300 }
301 }
302
303 /*
304 * Maps loglevel from string to value
305 */
306 static
307 int loglevel_str_to_value(const char *inputstr)
308 {
309 int i = 0;
310 char str[LTTNG_SYMBOL_NAME_LEN];
311
312 if (!inputstr || strlen(inputstr) == 0) {
313 return -1;
314 }
315
316 /*
317 * Loop up to LTTNG_SYMBOL_NAME_LEN minus one because the NULL bytes is
318 * added at the end of the loop so a the upper bound we avoid the overflow.
319 */
320 while (i < (LTTNG_SYMBOL_NAME_LEN - 1) && inputstr[i] != '\0') {
321 str[i] = toupper(inputstr[i]);
322 i++;
323 }
324 str[i] = '\0';
325 if (!strcmp(str, "TRACE_EMERG") || !strcmp(str, "EMERG")) {
326 return LTTNG_LOGLEVEL_EMERG;
327 } else if (!strcmp(str, "TRACE_ALERT") || !strcmp(str, "ALERT")) {
328 return LTTNG_LOGLEVEL_ALERT;
329 } else if (!strcmp(str, "TRACE_CRIT") || !strcmp(str, "CRIT")) {
330 return LTTNG_LOGLEVEL_CRIT;
331 } else if (!strcmp(str, "TRACE_ERR") || !strcmp(str, "ERR")) {
332 return LTTNG_LOGLEVEL_ERR;
333 } else if (!strcmp(str, "TRACE_WARNING") || !strcmp(str, "WARNING")) {
334 return LTTNG_LOGLEVEL_WARNING;
335 } else if (!strcmp(str, "TRACE_NOTICE") || !strcmp(str, "NOTICE")) {
336 return LTTNG_LOGLEVEL_NOTICE;
337 } else if (!strcmp(str, "TRACE_INFO") || !strcmp(str, "INFO")) {
338 return LTTNG_LOGLEVEL_INFO;
339 } else if (!strcmp(str, "TRACE_DEBUG_SYSTEM") || !strcmp(str, "DEBUG_SYSTEM") || !strcmp(str, "SYSTEM")) {
340 return LTTNG_LOGLEVEL_DEBUG_SYSTEM;
341 } else if (!strcmp(str, "TRACE_DEBUG_PROGRAM") || !strcmp(str, "DEBUG_PROGRAM") || !strcmp(str, "PROGRAM")) {
342 return LTTNG_LOGLEVEL_DEBUG_PROGRAM;
343 } else if (!strcmp(str, "TRACE_DEBUG_PROCESS") || !strcmp(str, "DEBUG_PROCESS") || !strcmp(str, "PROCESS")) {
344 return LTTNG_LOGLEVEL_DEBUG_PROCESS;
345 } else if (!strcmp(str, "TRACE_DEBUG_MODULE") || !strcmp(str, "DEBUG_MODULE") || !strcmp(str, "MODULE")) {
346 return LTTNG_LOGLEVEL_DEBUG_MODULE;
347 } else if (!strcmp(str, "TRACE_DEBUG_UNIT") || !strcmp(str, "DEBUG_UNIT") || !strcmp(str, "UNIT")) {
348 return LTTNG_LOGLEVEL_DEBUG_UNIT;
349 } else if (!strcmp(str, "TRACE_DEBUG_FUNCTION") || !strcmp(str, "DEBUG_FUNCTION") || !strcmp(str, "FUNCTION")) {
350 return LTTNG_LOGLEVEL_DEBUG_FUNCTION;
351 } else if (!strcmp(str, "TRACE_DEBUG_LINE") || !strcmp(str, "DEBUG_LINE") || !strcmp(str, "LINE")) {
352 return LTTNG_LOGLEVEL_DEBUG_LINE;
353 } else if (!strcmp(str, "TRACE_DEBUG") || !strcmp(str, "DEBUG")) {
354 return LTTNG_LOGLEVEL_DEBUG;
355 } else {
356 return -1;
357 }
358 }
359
360 static
361 const char *print_channel_name(const char *name)
362 {
363 return name ? : DEFAULT_CHANNEL_NAME;
364 }
365
366 static
367 const char *print_raw_channel_name(const char *name)
368 {
369 return name ? : "<default>";
370 }
371
372 /*
373 * Mi print exlcusion list
374 */
375 static
376 int mi_print_exclusion(char **names)
377 {
378 int i, ret;
379 int count = names ? strutils_array_of_strings_len(names) : 0;
380
381 assert(writer);
382
383 if (count == 0) {
384 ret = 0;
385 goto end;
386 }
387 ret = mi_lttng_writer_open_element(writer, config_element_exclusions);
388 if (ret) {
389 goto end;
390 }
391
392 for (i = 0; i < count; i++) {
393 ret = mi_lttng_writer_write_element_string(writer,
394 config_element_exclusion, names[i]);
395 if (ret) {
396 goto end;
397 }
398 }
399
400 /* Close exclusions element */
401 ret = mi_lttng_writer_close_element(writer);
402
403 end:
404 return ret;
405 }
406
407 /*
408 * Return allocated string for pretty-printing exclusion names.
409 */
410 static
411 char *print_exclusions(char **names)
412 {
413 int length = 0;
414 int i;
415 const char *preamble = " excluding ";
416 char *ret;
417 int count = names ? strutils_array_of_strings_len(names) : 0;
418
419 if (count == 0) {
420 return strdup("");
421 }
422
423 /* calculate total required length */
424 for (i = 0; i < count; i++) {
425 length += strlen(names[i]) + 4;
426 }
427
428 /* add length of preamble + one for NUL - one for last (missing) comma */
429 length += strlen(preamble);
430 ret = zmalloc(length + 1);
431 if (!ret) {
432 return NULL;
433 }
434 strncpy(ret, preamble, length);
435 for (i = 0; i < count; i++) {
436 strcat(ret, "\"");
437 strcat(ret, names[i]);
438 strcat(ret, "\"");
439 if (i != count - 1) {
440 strcat(ret, ", ");
441 }
442 }
443
444 return ret;
445 }
446
447 static
448 int check_exclusion_subsets(const char *event_name, const char *exclusion)
449 {
450 bool warn = false;
451 int ret = 0;
452 const char *e = event_name;
453 const char *x = exclusion;
454
455 /* Scan both the excluder and the event letter by letter */
456 while (true) {
457 if (*e == '\\') {
458 if (*x != *e) {
459 warn = true;
460 goto end;
461 }
462
463 e++;
464 x++;
465 goto cmp_chars;
466 }
467
468 if (*x == '*') {
469 /* Event is a subset of the excluder */
470 ERR("Event %s: %s excludes all events from %s",
471 event_name, exclusion, event_name);
472 goto error;
473 }
474
475 if (*e == '*') {
476 /*
477 * Reached the end of the event name before the
478 * end of the exclusion: this is valid.
479 */
480 goto end;
481 }
482
483 cmp_chars:
484 if (*x != *e) {
485 warn = true;
486 break;
487 }
488
489 x++;
490 e++;
491 }
492
493 goto end;
494
495 error:
496 ret = -1;
497
498 end:
499 if (warn) {
500 WARN("Event %s: %s does not exclude any events from %s",
501 event_name, exclusion, event_name);
502 }
503
504 return ret;
505 }
506
507 static
508 int create_exclusion_list_and_validate(const char *event_name,
509 const char *exclusions_arg,
510 char ***exclusion_list)
511 {
512 int ret = 0;
513 char **exclusions = NULL;
514
515 /* Event name must be a valid globbing pattern to allow exclusions. */
516 if (!strutils_is_star_glob_pattern(event_name)) {
517 ERR("Event %s: Exclusions can only be used with a globbing pattern",
518 event_name);
519 goto error;
520 }
521
522 /* Split exclusions. */
523 exclusions = strutils_split(exclusions_arg, ',', true);
524 if (!exclusions) {
525 goto error;
526 }
527
528 /*
529 * If the event name is a star-at-end only globbing pattern,
530 * then we can validate the individual exclusions. Otherwise
531 * all exclusions are passed to the session daemon.
532 */
533 if (strutils_is_star_at_the_end_only_glob_pattern(event_name)) {
534 char * const *exclusion;
535
536 for (exclusion = exclusions; *exclusion; exclusion++) {
537 if (!strutils_is_star_glob_pattern(*exclusion) ||
538 strutils_is_star_at_the_end_only_glob_pattern(*exclusion)) {
539 ret = check_exclusion_subsets(event_name, *exclusion);
540 if (ret) {
541 goto error;
542 }
543 }
544 }
545 }
546
547 *exclusion_list = exclusions;
548
549 goto end;
550
551 error:
552 ret = -1;
553 strutils_free_null_terminated_array_of_strings(exclusions);
554
555 end:
556 return ret;
557 }
558
559 static void warn_on_truncated_exclusion_names(char * const *exclusion_list,
560 int *warn)
561 {
562 char * const *exclusion;
563
564 for (exclusion = exclusion_list; *exclusion; exclusion++) {
565 if (strlen(*exclusion) >= LTTNG_SYMBOL_NAME_LEN) {
566 WARN("Event exclusion \"%s\" will be truncated",
567 *exclusion);
568 *warn = 1;
569 }
570 }
571 }
572
573 /*
574 * Enabling event using the lttng API.
575 * Note: in case of error only the last error code will be return.
576 */
577 static int enable_events(char *session_name)
578 {
579 int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
580 int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
581 char *event_name, *channel_name = NULL;
582 struct lttng_event *ev;
583 struct lttng_domain dom;
584 char **exclusion_list = NULL;
585
586 memset(&dom, 0, sizeof(dom));
587
588 ev = lttng_event_create();
589 if (!ev) {
590 ret = CMD_ERROR;
591 goto error;
592 }
593
594 if (opt_kernel) {
595 if (opt_loglevel) {
596 WARN("Kernel loglevels are not supported.");
597 }
598 }
599
600 /* Create lttng domain */
601 if (opt_kernel) {
602 dom.type = LTTNG_DOMAIN_KERNEL;
603 dom.buf_type = LTTNG_BUFFER_GLOBAL;
604 } else if (opt_userspace) {
605 dom.type = LTTNG_DOMAIN_UST;
606 /* Default. */
607 dom.buf_type = LTTNG_BUFFER_PER_UID;
608 } else if (opt_jul) {
609 dom.type = LTTNG_DOMAIN_JUL;
610 /* Default. */
611 dom.buf_type = LTTNG_BUFFER_PER_UID;
612 } else if (opt_log4j) {
613 dom.type = LTTNG_DOMAIN_LOG4J;
614 /* Default. */
615 dom.buf_type = LTTNG_BUFFER_PER_UID;
616 } else if (opt_python) {
617 dom.type = LTTNG_DOMAIN_PYTHON;
618 /* Default. */
619 dom.buf_type = LTTNG_BUFFER_PER_UID;
620 } else {
621 /* Checked by the caller. */
622 assert(0);
623 }
624
625 if (opt_exclude) {
626 switch (dom.type) {
627 case LTTNG_DOMAIN_KERNEL:
628 case LTTNG_DOMAIN_JUL:
629 case LTTNG_DOMAIN_LOG4J:
630 case LTTNG_DOMAIN_PYTHON:
631 ERR("Event name exclusions are not yet implemented for %s events",
632 get_domain_str(dom.type));
633 ret = CMD_ERROR;
634 goto error;
635 case LTTNG_DOMAIN_UST:
636 /* Exclusions supported */
637 break;
638 default:
639 assert(0);
640 }
641 }
642
643 channel_name = opt_channel_name;
644
645 handle = lttng_create_handle(session_name, &dom);
646 if (handle == NULL) {
647 ret = -1;
648 goto error;
649 }
650
651 /* Prepare Mi */
652 if (lttng_opt_mi) {
653 /* Open a events element */
654 ret = mi_lttng_writer_open_element(writer, config_element_events);
655 if (ret) {
656 ret = CMD_ERROR;
657 goto error;
658 }
659 }
660
661 if (opt_enable_all) {
662 /* Default setup for enable all */
663 if (opt_kernel) {
664 ev->type = opt_event_type;
665 strcpy(ev->name, "*");
666 /* kernel loglevels not implemented */
667 ev->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
668 } else {
669 ev->type = LTTNG_EVENT_TRACEPOINT;
670 strcpy(ev->name, "*");
671 ev->loglevel_type = opt_loglevel_type;
672 if (opt_loglevel) {
673 assert(opt_userspace || opt_jul || opt_log4j || opt_python);
674 if (opt_userspace) {
675 ev->loglevel = loglevel_str_to_value(opt_loglevel);
676 } else if (opt_jul) {
677 ev->loglevel = loglevel_jul_str_to_value(opt_loglevel);
678 } else if (opt_log4j) {
679 ev->loglevel = loglevel_log4j_str_to_value(opt_loglevel);
680 } else if (opt_python) {
681 ev->loglevel = loglevel_python_str_to_value(opt_loglevel);
682 }
683 if (ev->loglevel == -1) {
684 ERR("Unknown loglevel %s", opt_loglevel);
685 ret = -LTTNG_ERR_INVALID;
686 goto error;
687 }
688 } else {
689 assert(opt_userspace || opt_jul || opt_log4j || opt_python);
690 if (opt_userspace) {
691 ev->loglevel = -1;
692 } else if (opt_jul) {
693 ev->loglevel = LTTNG_LOGLEVEL_JUL_ALL;
694 } else if (opt_log4j) {
695 ev->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
696 } else if (opt_python) {
697 ev->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
698 }
699 }
700 }
701
702 if (opt_exclude) {
703 ret = create_exclusion_list_and_validate("*",
704 opt_exclude, &exclusion_list);
705 if (ret) {
706 ret = CMD_ERROR;
707 goto error;
708 }
709
710 ev->exclusion = 1;
711 warn_on_truncated_exclusion_names(exclusion_list,
712 &warn);
713 }
714 if (!opt_filter) {
715 ret = lttng_enable_event_with_exclusions(handle,
716 ev, channel_name,
717 NULL,
718 exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
719 exclusion_list);
720 if (ret < 0) {
721 switch (-ret) {
722 case LTTNG_ERR_KERN_EVENT_EXIST:
723 WARN("Kernel events already enabled (channel %s, session %s)",
724 print_channel_name(channel_name), session_name);
725 warn = 1;
726 break;
727 case LTTNG_ERR_TRACE_ALREADY_STARTED:
728 {
729 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
730 ERR("Events: %s (channel %s, session %s)",
731 msg,
732 print_channel_name(channel_name),
733 session_name);
734 error = 1;
735 break;
736 }
737 default:
738 ERR("Events: %s (channel %s, session %s)",
739 lttng_strerror(ret),
740 ret == -LTTNG_ERR_NEED_CHANNEL_NAME
741 ? print_raw_channel_name(channel_name)
742 : print_channel_name(channel_name),
743 session_name);
744 error = 1;
745 break;
746 }
747 goto end;
748 }
749
750 switch (opt_event_type) {
751 case LTTNG_EVENT_TRACEPOINT:
752 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
753 char *exclusion_string = print_exclusions(exclusion_list);
754
755 if (!exclusion_string) {
756 PERROR("Cannot allocate exclusion_string");
757 error = 1;
758 goto end;
759 }
760 MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
761 get_domain_str(dom.type),
762 exclusion_string,
763 print_channel_name(channel_name),
764 opt_loglevel);
765 free(exclusion_string);
766 } else {
767 char *exclusion_string = print_exclusions(exclusion_list);
768
769 if (!exclusion_string) {
770 PERROR("Cannot allocate exclusion_string");
771 error = 1;
772 goto end;
773 }
774 MSG("All %s tracepoints%s are enabled in channel %s",
775 get_domain_str(dom.type),
776 exclusion_string,
777 print_channel_name(channel_name));
778 free(exclusion_string);
779 }
780 break;
781 case LTTNG_EVENT_SYSCALL:
782 if (opt_kernel) {
783 MSG("All %s system calls are enabled in channel %s",
784 get_domain_str(dom.type),
785 print_channel_name(channel_name));
786 }
787 break;
788 case LTTNG_EVENT_ALL:
789 if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
790 char *exclusion_string = print_exclusions(exclusion_list);
791
792 if (!exclusion_string) {
793 PERROR("Cannot allocate exclusion_string");
794 error = 1;
795 goto end;
796 }
797 MSG("All %s events%s are enabled in channel %s for loglevel %s",
798 get_domain_str(dom.type),
799 exclusion_string,
800 print_channel_name(channel_name),
801 opt_loglevel);
802 free(exclusion_string);
803 } else {
804 char *exclusion_string = print_exclusions(exclusion_list);
805
806 if (!exclusion_string) {
807 PERROR("Cannot allocate exclusion_string");
808 error = 1;
809 goto end;
810 }
811 MSG("All %s events%s are enabled in channel %s",
812 get_domain_str(dom.type),
813 exclusion_string,
814 print_channel_name(channel_name));
815 free(exclusion_string);
816 }
817 break;
818 default:
819 /*
820 * We should not be here since lttng_enable_event should have
821 * failed on the event type.
822 */
823 goto error;
824 }
825 }
826
827 if (opt_filter) {
828 command_ret = lttng_enable_event_with_exclusions(handle, ev, channel_name,
829 opt_filter,
830 exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
831 exclusion_list);
832 if (command_ret < 0) {
833 switch (-command_ret) {
834 case LTTNG_ERR_FILTER_EXIST:
835 WARN("Filter on all events is already enabled"
836 " (channel %s, session %s)",
837 print_channel_name(channel_name), session_name);
838 warn = 1;
839 break;
840 case LTTNG_ERR_TRACE_ALREADY_STARTED:
841 {
842 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
843 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
844 msg,
845 print_channel_name(channel_name),
846 session_name, opt_filter);
847 error = 1;
848 break;
849 }
850 default:
851 ERR("All events: %s (channel %s, session %s, filter \'%s\')",
852 lttng_strerror(command_ret),
853 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
854 ? print_raw_channel_name(channel_name)
855 : print_channel_name(channel_name),
856 session_name, opt_filter);
857 error = 1;
858 break;
859 }
860 error_holder = command_ret;
861 } else {
862 ev->filter = 1;
863 MSG("Filter '%s' successfully set", opt_filter);
864 }
865 }
866
867 if (lttng_opt_mi) {
868 /* The wildcard * is used for kernel and ust domain to
869 * represent ALL. We copy * in event name to force the wildcard use
870 * for kernel domain
871 *
872 * Note: this is strictly for semantic and printing while in
873 * machine interface mode.
874 */
875 strcpy(ev->name, "*");
876
877 /* If we reach here the events are enabled */
878 if (!error && !warn) {
879 ev->enabled = 1;
880 } else {
881 ev->enabled = 0;
882 success = 0;
883 }
884 ret = mi_lttng_event(writer, ev, 1, handle->domain.type);
885 if (ret) {
886 ret = CMD_ERROR;
887 goto error;
888 }
889
890 /* print exclusion */
891 ret = mi_print_exclusion(exclusion_list);
892 if (ret) {
893 ret = CMD_ERROR;
894 goto error;
895 }
896
897 /* Success ? */
898 ret = mi_lttng_writer_write_element_bool(writer,
899 mi_lttng_element_command_success, success);
900 if (ret) {
901 ret = CMD_ERROR;
902 goto error;
903 }
904
905 /* Close event element */
906 ret = mi_lttng_writer_close_element(writer);
907 if (ret) {
908 ret = CMD_ERROR;
909 goto error;
910 }
911 }
912
913 goto end;
914 }
915
916 /* Strip event list */
917 event_name = strtok(opt_event_list, ",");
918 while (event_name != NULL) {
919 /* Copy name and type of the event */
920 strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN);
921 ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
922 ev->type = opt_event_type;
923
924 /* Kernel tracer action */
925 if (opt_kernel) {
926 DBG("Enabling kernel event %s for channel %s",
927 event_name,
928 print_channel_name(channel_name));
929
930 switch (opt_event_type) {
931 case LTTNG_EVENT_ALL: /* Enable tracepoints and syscalls */
932 /* If event name differs from *, select tracepoint. */
933 if (strcmp(ev->name, "*")) {
934 ev->type = LTTNG_EVENT_TRACEPOINT;
935 }
936 break;
937 case LTTNG_EVENT_TRACEPOINT:
938 break;
939 case LTTNG_EVENT_PROBE:
940 ret = parse_probe_opts(ev, opt_probe);
941 if (ret) {
942 ERR("Unable to parse probe options");
943 ret = CMD_ERROR;
944 goto error;
945 }
946 break;
947 case LTTNG_EVENT_FUNCTION:
948 ret = parse_probe_opts(ev, opt_function);
949 if (ret) {
950 ERR("Unable to parse function probe options");
951 ret = CMD_ERROR;
952 goto error;
953 }
954 break;
955 case LTTNG_EVENT_SYSCALL:
956 ev->type = LTTNG_EVENT_SYSCALL;
957 break;
958 default:
959 ret = CMD_UNDEFINED;
960 goto error;
961 }
962
963 /* kernel loglevels not implemented */
964 ev->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
965 } else if (opt_userspace) { /* User-space tracer action */
966 DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
967 print_channel_name(channel_name), opt_loglevel ? : "<all>");
968
969 switch (opt_event_type) {
970 case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
971 /* Fall-through */
972 case LTTNG_EVENT_TRACEPOINT:
973 /* Copy name and type of the event */
974 ev->type = LTTNG_EVENT_TRACEPOINT;
975 strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN);
976 ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
977 break;
978 case LTTNG_EVENT_PROBE:
979 case LTTNG_EVENT_FUNCTION:
980 case LTTNG_EVENT_SYSCALL:
981 default:
982 ERR("Event type not available for user-space tracing");
983 ret = CMD_UNSUPPORTED;
984 goto error;
985 }
986
987 if (opt_exclude) {
988 ev->exclusion = 1;
989 if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
990 ERR("Exclusion option can only be used with tracepoint events");
991 ret = CMD_ERROR;
992 goto error;
993 }
994 /* Free previously allocated items */
995 strutils_free_null_terminated_array_of_strings(
996 exclusion_list);
997 exclusion_list = NULL;
998 ret = create_exclusion_list_and_validate(
999 event_name, opt_exclude,
1000 &exclusion_list);
1001 if (ret) {
1002 ret = CMD_ERROR;
1003 goto error;
1004 }
1005
1006 warn_on_truncated_exclusion_names(
1007 exclusion_list, &warn);
1008 }
1009
1010 ev->loglevel_type = opt_loglevel_type;
1011 if (opt_loglevel) {
1012 ev->loglevel = loglevel_str_to_value(opt_loglevel);
1013 if (ev->loglevel == -1) {
1014 ERR("Unknown loglevel %s", opt_loglevel);
1015 ret = -LTTNG_ERR_INVALID;
1016 goto error;
1017 }
1018 } else {
1019 ev->loglevel = -1;
1020 }
1021 } else if (opt_jul || opt_log4j || opt_python) {
1022 if (opt_event_type != LTTNG_EVENT_ALL &&
1023 opt_event_type != LTTNG_EVENT_TRACEPOINT) {
1024 ERR("Event type not supported for domain.");
1025 ret = CMD_UNSUPPORTED;
1026 goto error;
1027 }
1028
1029 ev->loglevel_type = opt_loglevel_type;
1030 if (opt_loglevel) {
1031 if (opt_jul) {
1032 ev->loglevel = loglevel_jul_str_to_value(opt_loglevel);
1033 } else if (opt_log4j) {
1034 ev->loglevel = loglevel_log4j_str_to_value(opt_loglevel);
1035 } else if (opt_python) {
1036 ev->loglevel = loglevel_python_str_to_value(opt_loglevel);
1037 }
1038 if (ev->loglevel == -1) {
1039 ERR("Unknown loglevel %s", opt_loglevel);
1040 ret = -LTTNG_ERR_INVALID;
1041 goto error;
1042 }
1043 } else {
1044 if (opt_jul) {
1045 ev->loglevel = LTTNG_LOGLEVEL_JUL_ALL;
1046 } else if (opt_log4j) {
1047 ev->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
1048 } else if (opt_python) {
1049 ev->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
1050 }
1051 }
1052 ev->type = LTTNG_EVENT_TRACEPOINT;
1053 strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN);
1054 ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
1055 } else {
1056 assert(0);
1057 }
1058
1059 if (!opt_filter) {
1060 char *exclusion_string;
1061
1062 command_ret = lttng_enable_event_with_exclusions(handle,
1063 ev, channel_name,
1064 NULL,
1065 exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
1066 exclusion_list);
1067 exclusion_string = print_exclusions(exclusion_list);
1068 if (!exclusion_string) {
1069 PERROR("Cannot allocate exclusion_string");
1070 error = 1;
1071 goto end;
1072 }
1073 if (command_ret < 0) {
1074 /* Turn ret to positive value to handle the positive error code */
1075 switch (-command_ret) {
1076 case LTTNG_ERR_KERN_EVENT_EXIST:
1077 WARN("Kernel event %s%s already enabled (channel %s, session %s)",
1078 event_name,
1079 exclusion_string,
1080 print_channel_name(channel_name), session_name);
1081 warn = 1;
1082 break;
1083 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1084 {
1085 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1086 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1087 exclusion_string,
1088 msg,
1089 print_channel_name(channel_name),
1090 session_name);
1091 error = 1;
1092 break;
1093 }
1094 default:
1095 ERR("Event %s%s: %s (channel %s, session %s)", event_name,
1096 exclusion_string,
1097 lttng_strerror(command_ret),
1098 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1099 ? print_raw_channel_name(channel_name)
1100 : print_channel_name(channel_name),
1101 session_name);
1102 error = 1;
1103 break;
1104 }
1105 error_holder = command_ret;
1106 } else {
1107 switch (dom.type) {
1108 case LTTNG_DOMAIN_KERNEL:
1109 case LTTNG_DOMAIN_UST:
1110 MSG("%s event %s%s created in channel %s",
1111 get_domain_str(dom.type),
1112 event_name,
1113 exclusion_string,
1114 print_channel_name(channel_name));
1115 break;
1116 case LTTNG_DOMAIN_JUL:
1117 case LTTNG_DOMAIN_LOG4J:
1118 case LTTNG_DOMAIN_PYTHON:
1119 /*
1120 * Don't print the default channel
1121 * name for agent domains.
1122 */
1123 MSG("%s event %s%s enabled",
1124 get_domain_str(dom.type),
1125 event_name,
1126 exclusion_string);
1127 break;
1128 default:
1129 assert(0);
1130 }
1131 }
1132 free(exclusion_string);
1133 }
1134
1135 if (opt_filter) {
1136 char *exclusion_string;
1137
1138 /* Filter present */
1139 ev->filter = 1;
1140
1141 command_ret = lttng_enable_event_with_exclusions(handle, ev, channel_name,
1142 opt_filter,
1143 exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
1144 exclusion_list);
1145 exclusion_string = print_exclusions(exclusion_list);
1146 if (!exclusion_string) {
1147 PERROR("Cannot allocate exclusion_string");
1148 error = 1;
1149 goto end;
1150 }
1151 if (command_ret < 0) {
1152 switch (-command_ret) {
1153 case LTTNG_ERR_FILTER_EXIST:
1154 WARN("Filter on event %s%s is already enabled"
1155 " (channel %s, session %s)",
1156 event_name,
1157 exclusion_string,
1158 print_channel_name(channel_name), session_name);
1159 warn = 1;
1160 break;
1161 case LTTNG_ERR_TRACE_ALREADY_STARTED:
1162 {
1163 const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
1164 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev->name,
1165 exclusion_string,
1166 msg,
1167 print_channel_name(channel_name),
1168 session_name, opt_filter);
1169 error = 1;
1170 break;
1171 }
1172 default:
1173 ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev->name,
1174 exclusion_string,
1175 lttng_strerror(command_ret),
1176 command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
1177 ? print_raw_channel_name(channel_name)
1178 : print_channel_name(channel_name),
1179 session_name, opt_filter);
1180 error = 1;
1181 break;
1182 }
1183 error_holder = command_ret;
1184
1185 } else {
1186 MSG("Event %s%s: Filter '%s' successfully set",
1187 event_name, exclusion_string,
1188 opt_filter);
1189 }
1190 free(exclusion_string);
1191 }
1192
1193 if (lttng_opt_mi) {
1194 if (command_ret) {
1195 success = 0;
1196 ev->enabled = 0;
1197 } else {
1198 ev->enabled = 1;
1199 }
1200
1201 ret = mi_lttng_event(writer, ev, 1, handle->domain.type);
1202 if (ret) {
1203 ret = CMD_ERROR;
1204 goto error;
1205 }
1206
1207 /* print exclusion */
1208 ret = mi_print_exclusion(exclusion_list);
1209 if (ret) {
1210 ret = CMD_ERROR;
1211 goto error;
1212 }
1213
1214 /* Success ? */
1215 ret = mi_lttng_writer_write_element_bool(writer,
1216 mi_lttng_element_command_success, success);
1217 if (ret) {
1218 ret = CMD_ERROR;
1219 goto end;
1220 }
1221
1222 /* Close event element */
1223 ret = mi_lttng_writer_close_element(writer);
1224 if (ret) {
1225 ret = CMD_ERROR;
1226 goto end;
1227 }
1228 }
1229
1230 /* Next event */
1231 event_name = strtok(NULL, ",");
1232 /* Reset warn, error and success */
1233 success = 1;
1234 }
1235
1236 end:
1237 /* Close Mi */
1238 if (lttng_opt_mi) {
1239 /* Close events element */
1240 ret = mi_lttng_writer_close_element(writer);
1241 if (ret) {
1242 ret = CMD_ERROR;
1243 goto error;
1244 }
1245 }
1246 error:
1247 if (warn) {
1248 ret = CMD_WARNING;
1249 }
1250 if (error) {
1251 ret = CMD_ERROR;
1252 }
1253 lttng_destroy_handle(handle);
1254 strutils_free_null_terminated_array_of_strings(exclusion_list);
1255
1256 /* Overwrite ret with error_holder if there was an actual error with
1257 * enabling an event.
1258 */
1259 ret = error_holder ? error_holder : ret;
1260
1261 lttng_event_destroy(ev);
1262 return ret;
1263 }
1264
1265 /*
1266 * Add event to trace session
1267 */
1268 int cmd_enable_events(int argc, const char **argv)
1269 {
1270 int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
1271 static poptContext pc;
1272 char *session_name = NULL;
1273 const char *leftover = NULL;
1274 int event_type = -1;
1275
1276 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1277 poptReadDefaultConfig(pc, 0);
1278
1279 /* Default event type */
1280 opt_event_type = LTTNG_EVENT_ALL;
1281
1282 while ((opt = poptGetNextOpt(pc)) != -1) {
1283 switch (opt) {
1284 case OPT_HELP:
1285 SHOW_HELP();
1286 goto end;
1287 case OPT_TRACEPOINT:
1288 opt_event_type = LTTNG_EVENT_TRACEPOINT;
1289 break;
1290 case OPT_PROBE:
1291 opt_event_type = LTTNG_EVENT_PROBE;
1292 break;
1293 case OPT_FUNCTION:
1294 opt_event_type = LTTNG_EVENT_FUNCTION;
1295 break;
1296 case OPT_SYSCALL:
1297 opt_event_type = LTTNG_EVENT_SYSCALL;
1298 break;
1299 case OPT_USERSPACE:
1300 opt_userspace = 1;
1301 break;
1302 case OPT_LOGLEVEL:
1303 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE;
1304 opt_loglevel = poptGetOptArg(pc);
1305 break;
1306 case OPT_LOGLEVEL_ONLY:
1307 opt_loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE;
1308 opt_loglevel = poptGetOptArg(pc);
1309 break;
1310 case OPT_LIST_OPTIONS:
1311 list_cmd_options(stdout, long_options);
1312 goto end;
1313 case OPT_FILTER:
1314 break;
1315 case OPT_EXCLUDE:
1316 break;
1317 default:
1318 ret = CMD_UNDEFINED;
1319 goto end;
1320 }
1321
1322 /* Validate event type. Multiple event type are not supported. */
1323 if (event_type == -1) {
1324 event_type = opt_event_type;
1325 } else {
1326 if (event_type != opt_event_type) {
1327 ERR("Multiple event type not supported.");
1328 ret = CMD_ERROR;
1329 goto end;
1330 }
1331 }
1332 }
1333
1334 ret = print_missing_or_multiple_domains(
1335 opt_kernel + opt_userspace + opt_jul + opt_log4j + opt_python);
1336 if (ret) {
1337 ret = CMD_ERROR;
1338 goto end;
1339 }
1340
1341 /* Mi check */
1342 if (lttng_opt_mi) {
1343 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1344 if (!writer) {
1345 ret = -LTTNG_ERR_NOMEM;
1346 goto end;
1347 }
1348
1349 /* Open command element */
1350 ret = mi_lttng_writer_command_open(writer,
1351 mi_lttng_element_command_enable_event);
1352 if (ret) {
1353 ret = CMD_ERROR;
1354 goto end;
1355 }
1356
1357 /* Open output element */
1358 ret = mi_lttng_writer_open_element(writer,
1359 mi_lttng_element_command_output);
1360 if (ret) {
1361 ret = CMD_ERROR;
1362 goto end;
1363 }
1364 }
1365
1366 opt_event_list = (char*) poptGetArg(pc);
1367 if (opt_event_list == NULL && opt_enable_all == 0) {
1368 ERR("Missing event name(s).\n");
1369 ret = CMD_ERROR;
1370 goto end;
1371 }
1372
1373 leftover = poptGetArg(pc);
1374 if (leftover) {
1375 ERR("Unknown argument: %s", leftover);
1376 ret = CMD_ERROR;
1377 goto end;
1378 }
1379
1380 if (!opt_session_name) {
1381 session_name = get_session_name();
1382 if (session_name == NULL) {
1383 command_ret = CMD_ERROR;
1384 success = 0;
1385 goto mi_closing;
1386 }
1387 } else {
1388 session_name = opt_session_name;
1389 }
1390
1391 command_ret = enable_events(session_name);
1392 if (command_ret) {
1393 success = 0;
1394 goto mi_closing;
1395 }
1396
1397 mi_closing:
1398 /* Mi closing */
1399 if (lttng_opt_mi) {
1400 /* Close output element */
1401 ret = mi_lttng_writer_close_element(writer);
1402 if (ret) {
1403 ret = CMD_ERROR;
1404 goto end;
1405 }
1406
1407 ret = mi_lttng_writer_write_element_bool(writer,
1408 mi_lttng_element_command_success, success);
1409 if (ret) {
1410 ret = CMD_ERROR;
1411 goto end;
1412 }
1413
1414 /* Command element close */
1415 ret = mi_lttng_writer_command_close(writer);
1416 if (ret) {
1417 ret = CMD_ERROR;
1418 goto end;
1419 }
1420 }
1421
1422 end:
1423 /* Mi clean-up */
1424 if (writer && mi_lttng_writer_destroy(writer)) {
1425 /* Preserve original error code */
1426 ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL;
1427 }
1428
1429 if (opt_session_name == NULL) {
1430 free(session_name);
1431 }
1432
1433 /* Overwrite ret if an error occurred in enable_events */
1434 ret = command_ret ? command_ret : ret;
1435
1436 poptFreeContext(pc);
1437 return ret;
1438 }
1439
LTTng tools - Deliverables
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