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Backport: trackers: update list/track/untrack commands
[lttng-tools.git] / src / bin / lttng / commands / list.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 <inttypes.h>
20 #include <popt.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <assert.h>
25
26 #include <common/mi-lttng.h>
27 #include <lttng/constant.h>
28
29 #include "../command.h"
30
31 static int opt_userspace;
32 static int opt_kernel;
33 static int opt_jul;
34 static int opt_log4j;
35 static int opt_python;
36 static char *opt_channel;
37 static int opt_domain;
38 static int opt_fields;
39 static int opt_syscall;
40
41 const char *indent4 = " ";
42 const char *indent6 = " ";
43 const char *indent8 = " ";
44
45 enum {
46 OPT_HELP = 1,
47 OPT_USERSPACE,
48 OPT_LIST_OPTIONS,
49 };
50
51 static struct lttng_handle *handle;
52 static struct mi_writer *writer;
53
54 static struct poptOption long_options[] = {
55 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
56 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
57 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
58 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
59 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
60 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
61 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
62 {"channel", 'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0},
63 {"domain", 'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0},
64 {"fields", 'f', POPT_ARG_VAL, &opt_fields, 1, 0, 0},
65 {"syscall", 'S', POPT_ARG_VAL, &opt_syscall, 1, 0, 0},
66 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
67 {0, 0, 0, 0, 0, 0, 0}
68 };
69
70 /*
71 * Get command line from /proc for a specific pid.
72 *
73 * On success, return an allocated string pointer to the proc cmdline.
74 * On error, return NULL.
75 */
76 static char *get_cmdline_by_pid(pid_t pid)
77 {
78 int ret;
79 FILE *fp = NULL;
80 char *cmdline = NULL;
81 /* Can't go bigger than /proc/LTTNG_MAX_PID/cmdline */
82 char path[sizeof("/proc//cmdline") + sizeof(LTTNG_MAX_PID_STR) - 1];
83
84 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
85 fp = fopen(path, "r");
86 if (fp == NULL) {
87 goto end;
88 }
89
90 /* Caller must free() *cmdline */
91 cmdline = zmalloc(PATH_MAX);
92 if (!cmdline) {
93 PERROR("malloc cmdline");
94 goto end;
95 }
96 ret = fread(cmdline, 1, PATH_MAX, fp);
97 if (ret < 0) {
98 PERROR("fread proc list");
99 }
100
101 end:
102 if (fp) {
103 fclose(fp);
104 }
105 return cmdline;
106 }
107
108 static
109 const char *active_string(int value)
110 {
111 switch (value) {
112 case 0: return "inactive";
113 case 1: return "active";
114 case -1: return "";
115 default: return NULL;
116 }
117 }
118
119 static const char *snapshot_string(int value)
120 {
121 switch (value) {
122 case 1:
123 return " snapshot";
124 default:
125 return "";
126 }
127 }
128
129 static
130 const char *enabled_string(int value)
131 {
132 switch (value) {
133 case 0: return " [disabled]";
134 case 1: return " [enabled]";
135 case -1: return "";
136 default: return NULL;
137 }
138 }
139
140 static
141 const char *safe_string(const char *str)
142 {
143 return str ? str : "";
144 }
145
146 static const char *logleveltype_string(enum lttng_loglevel_type value)
147 {
148 switch (value) {
149 case LTTNG_EVENT_LOGLEVEL_ALL:
150 return ":";
151 case LTTNG_EVENT_LOGLEVEL_RANGE:
152 return " <=";
153 case LTTNG_EVENT_LOGLEVEL_SINGLE:
154 return " ==";
155 default:
156 return " <<TYPE UNKN>>";
157 }
158 }
159
160 static const char *bitness_event(enum lttng_event_flag flags)
161 {
162 if (flags & LTTNG_EVENT_FLAG_SYSCALL_32) {
163 if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
164 return " [32/64-bit]";
165 } else {
166 return " [32-bit]";
167 }
168 } else if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
169 return " [64-bit]";
170 } else {
171 return "";
172 }
173 }
174
175 /*
176 * Get exclusion names message for a single event.
177 *
178 * Returned pointer must be freed by caller. Returns NULL on error.
179 */
180 static char *get_exclusion_names_msg(struct lttng_event *event)
181 {
182 int ret;
183 int exclusion_count;
184 char *exclusion_msg = NULL;
185 char *at;
186 size_t i;
187 const char * const exclusion_fmt = " [exclusions: ";
188 const size_t exclusion_fmt_len = strlen(exclusion_fmt);
189
190 exclusion_count = lttng_event_get_exclusion_name_count(event);
191 if (exclusion_count < 0) {
192 goto end;
193 } else if (exclusion_count == 0) {
194 /*
195 * No exclusions: return copy of empty string so that
196 * it can be freed by caller.
197 */
198 exclusion_msg = strdup("");
199 goto end;
200 }
201
202 /*
203 * exclusion_msg's size is bounded by the exclusion_fmt string,
204 * a comma per entry, the entry count (fixed-size), a closing
205 * bracket, and a trailing \0.
206 */
207 exclusion_msg = malloc(exclusion_count +
208 exclusion_count * LTTNG_SYMBOL_NAME_LEN +
209 exclusion_fmt_len + 1);
210 if (!exclusion_msg) {
211 goto end;
212 }
213
214 at = strcpy(exclusion_msg, exclusion_fmt) + exclusion_fmt_len;
215 for (i = 0; i < exclusion_count; ++i) {
216 const char *name;
217
218 /* Append comma between exclusion names */
219 if (i > 0) {
220 *at = ',';
221 at++;
222 }
223
224 ret = lttng_event_get_exclusion_name(event, i, &name);
225 if (ret) {
226 /* Prints '?' on local error; should never happen */
227 *at = '?';
228 at++;
229 continue;
230 }
231
232 /* Append exclusion name */
233 at += sprintf(at, "%s", name);
234 }
235
236 /* This also puts a final '\0' at the end of exclusion_msg */
237 strcpy(at, "]");
238
239 end:
240 return exclusion_msg;
241 }
242
243 /*
244 * Pretty print single event.
245 */
246 static void print_events(struct lttng_event *event)
247 {
248 int ret;
249 const char *filter_str;
250 char *filter_msg = NULL;
251 char *exclusion_msg = NULL;
252
253 ret = lttng_event_get_filter_expression(event, &filter_str);
254
255 if (ret) {
256 filter_msg = strdup(" [failed to retrieve filter]");
257 } else if (filter_str) {
258 const char * const filter_fmt = " [filter: '%s']";
259
260 filter_msg = malloc(strlen(filter_str) +
261 strlen(filter_fmt) + 1);
262 if (filter_msg) {
263 sprintf(filter_msg, filter_fmt,
264 filter_str);
265 }
266 }
267
268 exclusion_msg = get_exclusion_names_msg(event);
269 if (!exclusion_msg) {
270 exclusion_msg = strdup(" [failed to retrieve exclusions]");
271 }
272
273 switch (event->type) {
274 case LTTNG_EVENT_TRACEPOINT:
275 {
276 if (event->loglevel != -1) {
277 MSG("%s%s (loglevel%s %s (%d)) (type: tracepoint)%s%s%s",
278 indent6,
279 event->name,
280 logleveltype_string(event->loglevel_type),
281 mi_lttng_loglevel_string(event->loglevel, handle->domain.type),
282 event->loglevel,
283 enabled_string(event->enabled),
284 safe_string(exclusion_msg),
285 safe_string(filter_msg));
286 } else {
287 MSG("%s%s (type: tracepoint)%s%s%s",
288 indent6,
289 event->name,
290 enabled_string(event->enabled),
291 safe_string(exclusion_msg),
292 safe_string(filter_msg));
293 }
294 break;
295 }
296 case LTTNG_EVENT_FUNCTION:
297 MSG("%s%s (type: function)%s%s", indent6,
298 event->name, enabled_string(event->enabled),
299 safe_string(filter_msg));
300 if (event->attr.probe.addr != 0) {
301 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
302 } else {
303 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
304 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
305 }
306 break;
307 case LTTNG_EVENT_PROBE:
308 MSG("%s%s (type: probe)%s%s", indent6,
309 event->name, enabled_string(event->enabled),
310 safe_string(filter_msg));
311 if (event->attr.probe.addr != 0) {
312 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
313 } else {
314 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
315 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
316 }
317 break;
318 case LTTNG_EVENT_FUNCTION_ENTRY:
319 MSG("%s%s (type: function)%s%s", indent6,
320 event->name, enabled_string(event->enabled),
321 safe_string(filter_msg));
322 MSG("%ssymbol: \"%s\"", indent8, event->attr.ftrace.symbol_name);
323 break;
324 case LTTNG_EVENT_SYSCALL:
325 MSG("%s%s%s%s%s%s", indent6, event->name,
326 (opt_syscall ? "" : " (type:syscall)"),
327 enabled_string(event->enabled),
328 bitness_event(event->flags),
329 safe_string(filter_msg));
330 break;
331 case LTTNG_EVENT_NOOP:
332 MSG("%s (type: noop)%s%s", indent6,
333 enabled_string(event->enabled),
334 safe_string(filter_msg));
335 break;
336 case LTTNG_EVENT_ALL:
337 /* We should never have "all" events in list. */
338 assert(0);
339 break;
340 }
341
342 free(filter_msg);
343 free(exclusion_msg);
344 }
345
346 static const char *field_type(struct lttng_event_field *field)
347 {
348 switch(field->type) {
349 case LTTNG_EVENT_FIELD_INTEGER:
350 return "integer";
351 case LTTNG_EVENT_FIELD_ENUM:
352 return "enum";
353 case LTTNG_EVENT_FIELD_FLOAT:
354 return "float";
355 case LTTNG_EVENT_FIELD_STRING:
356 return "string";
357 case LTTNG_EVENT_FIELD_OTHER:
358 default: /* fall-through */
359 return "unknown";
360 }
361 }
362
363 /*
364 * Pretty print single event fields.
365 */
366 static void print_event_field(struct lttng_event_field *field)
367 {
368 if (!field->field_name[0]) {
369 return;
370 }
371 MSG("%sfield: %s (%s)%s", indent8, field->field_name,
372 field_type(field), field->nowrite ? " [no write]" : "");
373 }
374
375 /*
376 * Machine interface
377 * Jul and ust event listing
378 */
379 static int mi_list_agent_ust_events(struct lttng_event *events, int count,
380 struct lttng_domain *domain)
381 {
382 int ret, i;
383 pid_t cur_pid = 0;
384 char *cmdline = NULL;
385 int pid_element_open = 0;
386
387 /* Open domains element */
388 ret = mi_lttng_domains_open(writer);
389 if (ret) {
390 goto end;
391 }
392
393 /* Write domain */
394 ret = mi_lttng_domain(writer, domain, 1);
395 if (ret) {
396 goto end;
397 }
398
399 /* Open pids element element */
400 ret = mi_lttng_pids_open(writer);
401 if (ret) {
402 goto end;
403 }
404
405 for (i = 0; i < count; i++) {
406 if (cur_pid != events[i].pid) {
407 if (pid_element_open) {
408 /* Close the previous events and pid element */
409 ret = mi_lttng_close_multi_element(writer, 2);
410 if (ret) {
411 goto end;
412 }
413 pid_element_open = 0;
414 }
415
416 cur_pid = events[i].pid;
417 cmdline = get_cmdline_by_pid(cur_pid);
418 if (!cmdline) {
419 ret = CMD_ERROR;
420 goto end;
421 }
422
423 if (!pid_element_open) {
424 /* Open and write a pid element */
425 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
426 if (ret) {
427 goto error;
428 }
429
430 /* Open events element */
431 ret = mi_lttng_events_open(writer);
432 if (ret) {
433 goto error;
434 }
435
436 pid_element_open = 1;
437 }
438 free(cmdline);
439 }
440
441 /* Write an event */
442 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
443 if (ret) {
444 goto end;
445 }
446 }
447
448 /* Close pids */
449 ret = mi_lttng_writer_close_element(writer);
450 if (ret) {
451 goto end;
452 }
453
454 /* Close domain, domains */
455 ret = mi_lttng_close_multi_element(writer, 2);
456 end:
457 return ret;
458 error:
459 free(cmdline);
460 return ret;
461 }
462
463 static int list_agent_events(void)
464 {
465 int i, size, ret = CMD_SUCCESS;
466 struct lttng_domain domain;
467 struct lttng_handle *handle = NULL;
468 struct lttng_event *event_list = NULL;
469 pid_t cur_pid = 0;
470 char *cmdline = NULL;
471 const char *agent_domain_str;
472
473 memset(&domain, 0, sizeof(domain));
474 if (opt_jul) {
475 domain.type = LTTNG_DOMAIN_JUL;
476 } else if (opt_log4j) {
477 domain.type = LTTNG_DOMAIN_LOG4J;
478 } else if (opt_python) {
479 domain.type = LTTNG_DOMAIN_PYTHON;
480 } else {
481 ERR("Invalid agent domain selected.");
482 ret = CMD_ERROR;
483 goto error;
484 }
485
486 agent_domain_str = get_domain_str(domain.type);
487
488 DBG("Getting %s tracing events", agent_domain_str);
489
490 handle = lttng_create_handle(NULL, &domain);
491 if (handle == NULL) {
492 ret = CMD_ERROR;
493 goto end;
494 }
495
496 size = lttng_list_tracepoints(handle, &event_list);
497 if (size < 0) {
498 ERR("Unable to list %s events: %s", agent_domain_str,
499 lttng_strerror(size));
500 ret = CMD_ERROR;
501 goto end;
502 }
503
504 if (lttng_opt_mi) {
505 /* Mi print */
506 ret = mi_list_agent_ust_events(event_list, size, &domain);
507 if (ret) {
508 ret = CMD_ERROR;
509 goto error;
510 }
511 } else {
512 /* Pretty print */
513 MSG("%s events (Logger name):\n-------------------------",
514 agent_domain_str);
515
516 if (size == 0) {
517 MSG("None");
518 }
519
520 for (i = 0; i < size; i++) {
521 if (cur_pid != event_list[i].pid) {
522 cur_pid = event_list[i].pid;
523 cmdline = get_cmdline_by_pid(cur_pid);
524 if (cmdline == NULL) {
525 ret = CMD_ERROR;
526 goto error;
527 }
528 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
529 free(cmdline);
530 }
531 MSG("%s- %s", indent6, event_list[i].name);
532 }
533
534 MSG("");
535 }
536
537 error:
538 free(event_list);
539 end:
540 lttng_destroy_handle(handle);
541 return ret;
542 }
543
544 /*
545 * Ask session daemon for all user space tracepoints available.
546 */
547 static int list_ust_events(void)
548 {
549 int i, size, ret = CMD_SUCCESS;
550 struct lttng_domain domain;
551 struct lttng_handle *handle;
552 struct lttng_event *event_list = NULL;
553 pid_t cur_pid = 0;
554 char *cmdline = NULL;
555
556 memset(&domain, 0, sizeof(domain));
557
558 DBG("Getting UST tracing events");
559
560 domain.type = LTTNG_DOMAIN_UST;
561
562 handle = lttng_create_handle(NULL, &domain);
563 if (handle == NULL) {
564 ret = CMD_ERROR;
565 goto end;
566 }
567
568 size = lttng_list_tracepoints(handle, &event_list);
569 if (size < 0) {
570 ERR("Unable to list UST events: %s", lttng_strerror(size));
571 ret = CMD_ERROR;
572 goto error;
573 }
574
575 if (lttng_opt_mi) {
576 /* Mi print */
577 ret = mi_list_agent_ust_events(event_list, size, &domain);
578 } else {
579 /* Pretty print */
580 MSG("UST events:\n-------------");
581
582 if (size == 0) {
583 MSG("None");
584 }
585
586 for (i = 0; i < size; i++) {
587 if (cur_pid != event_list[i].pid) {
588 cur_pid = event_list[i].pid;
589 cmdline = get_cmdline_by_pid(cur_pid);
590 if (cmdline == NULL) {
591 ret = CMD_ERROR;
592 goto error;
593 }
594 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
595 free(cmdline);
596 }
597 print_events(&event_list[i]);
598 }
599
600 MSG("");
601 }
602
603 error:
604 free(event_list);
605 end:
606 lttng_destroy_handle(handle);
607 return ret;
608 }
609
610 /*
611 * Machine interface
612 * List all ust event with their fields
613 */
614 static int mi_list_ust_event_fields(struct lttng_event_field *fields, int count,
615 struct lttng_domain *domain)
616 {
617 int ret, i;
618 pid_t cur_pid = 0;
619 char *cmdline = NULL;
620 int pid_element_open = 0;
621 int event_element_open = 0;
622 struct lttng_event cur_event;
623
624 memset(&cur_event, 0, sizeof(cur_event));
625
626 /* Open domains element */
627 ret = mi_lttng_domains_open(writer);
628 if (ret) {
629 goto end;
630 }
631
632 /* Write domain */
633 ret = mi_lttng_domain(writer, domain, 1);
634 if (ret) {
635 goto end;
636 }
637
638 /* Open pids element */
639 ret = mi_lttng_pids_open(writer);
640 if (ret) {
641 goto end;
642 }
643
644 for (i = 0; i < count; i++) {
645 if (cur_pid != fields[i].event.pid) {
646 if (pid_element_open) {
647 if (event_element_open) {
648 /* Close the previous field element and event. */
649 ret = mi_lttng_close_multi_element(writer, 2);
650 if (ret) {
651 goto end;
652 }
653 event_element_open = 0;
654 }
655 /* Close the previous events, pid element */
656 ret = mi_lttng_close_multi_element(writer, 2);
657 if (ret) {
658 goto end;
659 }
660 pid_element_open = 0;
661 }
662
663 cur_pid = fields[i].event.pid;
664 cmdline = get_cmdline_by_pid(cur_pid);
665 if (!pid_element_open) {
666 /* Open and write a pid element */
667 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
668 if (ret) {
669 goto error;
670 }
671
672 /* Open events element */
673 ret = mi_lttng_events_open(writer);
674 if (ret) {
675 goto error;
676 }
677 pid_element_open = 1;
678 }
679 free(cmdline);
680 /* Wipe current event since we are about to print a new PID. */
681 memset(&cur_event, 0, sizeof(cur_event));
682 }
683
684 if (strcmp(cur_event.name, fields[i].event.name) != 0) {
685 if (event_element_open) {
686 /* Close the previous fields element and the previous event */
687 ret = mi_lttng_close_multi_element(writer, 2);
688 if (ret) {
689 goto end;
690 }
691 event_element_open = 0;
692 }
693
694 memcpy(&cur_event, &fields[i].event,
695 sizeof(cur_event));
696
697 if (!event_element_open) {
698 /* Open and write the event */
699 ret = mi_lttng_event(writer, &cur_event, 1,
700 handle->domain.type);
701 if (ret) {
702 goto end;
703 }
704
705 /* Open a fields element */
706 ret = mi_lttng_event_fields_open(writer);
707 if (ret) {
708 goto end;
709 }
710 event_element_open = 1;
711 }
712 }
713
714 /* Print the event_field */
715 ret = mi_lttng_event_field(writer, &fields[i]);
716 if (ret) {
717 goto end;
718 }
719 }
720
721 /* Close pids, domain, domains */
722 ret = mi_lttng_close_multi_element(writer, 3);
723 end:
724 return ret;
725 error:
726 free(cmdline);
727 return ret;
728 }
729
730 /*
731 * Ask session daemon for all user space tracepoint fields available.
732 */
733 static int list_ust_event_fields(void)
734 {
735 int i, size, ret = CMD_SUCCESS;
736 struct lttng_domain domain;
737 struct lttng_handle *handle;
738 struct lttng_event_field *event_field_list;
739 pid_t cur_pid = 0;
740 char *cmdline = NULL;
741
742 struct lttng_event cur_event;
743
744 memset(&domain, 0, sizeof(domain));
745 memset(&cur_event, 0, sizeof(cur_event));
746
747 DBG("Getting UST tracing event fields");
748
749 domain.type = LTTNG_DOMAIN_UST;
750
751 handle = lttng_create_handle(NULL, &domain);
752 if (handle == NULL) {
753 ret = CMD_ERROR;
754 goto end;
755 }
756
757 size = lttng_list_tracepoint_fields(handle, &event_field_list);
758 if (size < 0) {
759 ERR("Unable to list UST event fields: %s", lttng_strerror(size));
760 ret = CMD_ERROR;
761 goto end;
762 }
763
764 if (lttng_opt_mi) {
765 /* Mi print */
766 ret = mi_list_ust_event_fields(event_field_list, size, &domain);
767 if (ret) {
768 ret = CMD_ERROR;
769 goto error;
770 }
771 } else {
772 /* Pretty print */
773 MSG("UST events:\n-------------");
774
775 if (size == 0) {
776 MSG("None");
777 }
778
779 for (i = 0; i < size; i++) {
780 if (cur_pid != event_field_list[i].event.pid) {
781 cur_pid = event_field_list[i].event.pid;
782 cmdline = get_cmdline_by_pid(cur_pid);
783 if (cmdline == NULL) {
784 ret = CMD_ERROR;
785 goto error;
786 }
787 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
788 free(cmdline);
789 /* Wipe current event since we are about to print a new PID. */
790 memset(&cur_event, 0, sizeof(cur_event));
791 }
792 if (strcmp(cur_event.name, event_field_list[i].event.name) != 0) {
793 print_events(&event_field_list[i].event);
794 memcpy(&cur_event, &event_field_list[i].event,
795 sizeof(cur_event));
796 }
797 print_event_field(&event_field_list[i]);
798 }
799
800 MSG("");
801 }
802
803 error:
804 free(event_field_list);
805 end:
806 lttng_destroy_handle(handle);
807 return ret;
808 }
809
810 /*
811 * Machine interface
812 * Print a list of kernel events
813 */
814 static int mi_list_kernel_events(struct lttng_event *events, int count,
815 struct lttng_domain *domain)
816 {
817 int ret, i;
818
819 /* Open domains element */
820 ret = mi_lttng_domains_open(writer);
821 if (ret) {
822 goto end;
823 }
824
825 /* Write domain */
826 ret = mi_lttng_domain(writer, domain, 1);
827 if (ret) {
828 goto end;
829 }
830
831 /* Open events */
832 ret = mi_lttng_events_open(writer);
833 if (ret) {
834 goto end;
835 }
836
837 for (i = 0; i < count; i++) {
838 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
839 if (ret) {
840 goto end;
841 }
842 }
843
844 /* close events, domain and domains */
845 ret = mi_lttng_close_multi_element(writer, 3);
846 if (ret) {
847 goto end;
848 }
849
850 end:
851 return ret;
852 }
853
854 /*
855 * Ask for all trace events in the kernel
856 */
857 static int list_kernel_events(void)
858 {
859 int i, size, ret = CMD_SUCCESS;
860 struct lttng_domain domain;
861 struct lttng_handle *handle;
862 struct lttng_event *event_list;
863
864 memset(&domain, 0, sizeof(domain));
865
866 DBG("Getting kernel tracing events");
867
868 domain.type = LTTNG_DOMAIN_KERNEL;
869
870 handle = lttng_create_handle(NULL, &domain);
871 if (handle == NULL) {
872 ret = CMD_ERROR;
873 goto error;
874 }
875
876 size = lttng_list_tracepoints(handle, &event_list);
877 if (size < 0) {
878 ERR("Unable to list kernel events: %s", lttng_strerror(size));
879 lttng_destroy_handle(handle);
880 return CMD_ERROR;
881 }
882
883 if (lttng_opt_mi) {
884 /* Mi print */
885 ret = mi_list_kernel_events(event_list, size, &domain);
886 if (ret) {
887 ret = CMD_ERROR;
888 goto end;
889 }
890 } else {
891 MSG("Kernel events:\n-------------");
892
893 for (i = 0; i < size; i++) {
894 print_events(&event_list[i]);
895 }
896
897 MSG("");
898 }
899
900 end:
901 free(event_list);
902
903 lttng_destroy_handle(handle);
904 return ret;
905
906 error:
907 lttng_destroy_handle(handle);
908 return ret;
909 }
910
911 /*
912 * Machine interface
913 * Print a list of system calls.
914 */
915 static int mi_list_syscalls(struct lttng_event *events, int count)
916 {
917 int ret, i;
918
919 /* Open events */
920 ret = mi_lttng_events_open(writer);
921 if (ret) {
922 goto end;
923 }
924
925 for (i = 0; i < count; i++) {
926 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
927 if (ret) {
928 goto end;
929 }
930 }
931
932 /* Close events. */
933 ret = mi_lttng_writer_close_element(writer);
934 if (ret) {
935 goto end;
936 }
937
938 end:
939 return ret;
940 }
941
942 /*
943 * Ask for kernel system calls.
944 */
945 static int list_syscalls(void)
946 {
947 int i, size, ret = CMD_SUCCESS;
948 struct lttng_event *event_list;
949
950 DBG("Getting kernel system call events");
951
952 size = lttng_list_syscalls(&event_list);
953 if (size < 0) {
954 ERR("Unable to list system calls: %s", lttng_strerror(size));
955 ret = CMD_ERROR;
956 goto error;
957 }
958
959 if (lttng_opt_mi) {
960 /* Mi print */
961 ret = mi_list_syscalls(event_list, size);
962 if (ret) {
963 ret = CMD_ERROR;
964 goto end;
965 }
966 } else {
967 MSG("System calls:\n-------------");
968
969 for (i = 0; i < size; i++) {
970 print_events(&event_list[i]);
971 }
972
973 MSG("");
974 }
975
976 end:
977 free(event_list);
978 return ret;
979
980 error:
981 return ret;
982 }
983
984 /*
985 * Machine Interface
986 * Print a list of agent events
987 */
988 static int mi_list_session_agent_events(struct lttng_event *events, int count)
989 {
990 int ret, i;
991
992 /* Open events element */
993 ret = mi_lttng_events_open(writer);
994 if (ret) {
995 goto end;
996 }
997
998 for (i = 0; i < count; i++) {
999 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1000 if (ret) {
1001 goto end;
1002 }
1003 }
1004
1005 /* Close events element */
1006 ret = mi_lttng_writer_close_element(writer);
1007
1008 end:
1009 return ret;
1010 }
1011
1012 /*
1013 * List agent events for a specific session using the handle.
1014 *
1015 * Return CMD_SUCCESS on success else a negative value.
1016 */
1017 static int list_session_agent_events(void)
1018 {
1019 int ret = CMD_SUCCESS, count, i;
1020 struct lttng_event *events = NULL;
1021
1022 count = lttng_list_events(handle, "", &events);
1023 if (count < 0) {
1024 ret = CMD_ERROR;
1025 ERR("%s", lttng_strerror(count));
1026 goto error;
1027 }
1028
1029 if (lttng_opt_mi) {
1030 /* Mi print */
1031 ret = mi_list_session_agent_events(events, count);
1032 if (ret) {
1033 ret = CMD_ERROR;
1034 goto end;
1035 }
1036 } else {
1037 /* Pretty print */
1038 MSG("Events (Logger name):\n---------------------");
1039 if (count == 0) {
1040 MSG("%sNone\n", indent6);
1041 goto end;
1042 }
1043
1044 for (i = 0; i < count; i++) {
1045 const char *filter_str;
1046 char *filter_msg = NULL;
1047 struct lttng_event *event = &events[i];
1048
1049 ret = lttng_event_get_filter_expression(event,
1050 &filter_str);
1051 if (ret) {
1052 filter_msg = strdup(" [failed to retrieve filter]");
1053 } else if (filter_str) {
1054 const char * const filter_fmt =
1055 " [filter: '%s']";
1056
1057 filter_msg = malloc(strlen(filter_str) +
1058 strlen(filter_fmt) + 1);
1059 if (filter_msg) {
1060 sprintf(filter_msg, filter_fmt,
1061 filter_str);
1062 }
1063 }
1064
1065 if (event->loglevel_type !=
1066 LTTNG_EVENT_LOGLEVEL_ALL) {
1067 MSG("%s- %s%s (loglevel%s %s)%s", indent4,
1068 event->name,
1069 enabled_string(event->enabled),
1070 logleveltype_string(
1071 event->loglevel_type),
1072 mi_lttng_loglevel_string(
1073 event->loglevel,
1074 handle->domain.type),
1075 safe_string(filter_msg));
1076 } else {
1077 MSG("%s- %s%s%s", indent4, event->name,
1078 enabled_string(event->enabled),
1079 safe_string(filter_msg));
1080 }
1081 free(filter_msg);
1082 }
1083
1084 MSG("");
1085 }
1086
1087 end:
1088 free(events);
1089 error:
1090 return ret;
1091 }
1092
1093 /*
1094 * Machine interface
1095 * print a list of event
1096 */
1097 static int mi_list_events(struct lttng_event *events, int count)
1098 {
1099 int ret, i;
1100
1101 /* Open events element */
1102 ret = mi_lttng_events_open(writer);
1103 if (ret) {
1104 goto end;
1105 }
1106
1107 for (i = 0; i < count; i++) {
1108 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1109 if (ret) {
1110 goto end;
1111 }
1112 }
1113
1114 /* Close events element */
1115 ret = mi_lttng_writer_close_element(writer);
1116
1117 end:
1118 return ret;
1119 }
1120
1121 /*
1122 * List events of channel of session and domain.
1123 */
1124 static int list_events(const char *channel_name)
1125 {
1126 int ret = CMD_SUCCESS, count, i;
1127 struct lttng_event *events = NULL;
1128
1129 count = lttng_list_events(handle, channel_name, &events);
1130 if (count < 0) {
1131 ret = CMD_ERROR;
1132 ERR("%s", lttng_strerror(count));
1133 goto error;
1134 }
1135
1136 if (lttng_opt_mi) {
1137 /* Mi print */
1138 ret = mi_list_events(events, count);
1139 if (ret) {
1140 ret = CMD_ERROR;
1141 goto end;
1142 }
1143 } else {
1144 /* Pretty print */
1145 MSG("\n%sEvents:", indent4);
1146 if (count == 0) {
1147 MSG("%sNone\n", indent6);
1148 goto end;
1149 }
1150
1151 for (i = 0; i < count; i++) {
1152 print_events(&events[i]);
1153 }
1154
1155 MSG("");
1156 }
1157 end:
1158 free(events);
1159 error:
1160 return ret;
1161 }
1162
1163 /*
1164 * Pretty print channel
1165 */
1166 static void print_channel(struct lttng_channel *channel)
1167 {
1168 int ret;
1169 uint64_t discarded_events, lost_packets;
1170
1171 ret = lttng_channel_get_discarded_event_count(channel,
1172 &discarded_events);
1173 if (ret) {
1174 ERR("Failed to retrieve discarded event count of channel");
1175 return;
1176 }
1177
1178 ret = lttng_channel_get_lost_packet_count(channel,
1179 &lost_packets);
1180 if (ret) {
1181 ERR("Failed to retrieve lost packet count of channel");
1182 return;
1183 }
1184
1185 MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled));
1186
1187 MSG("%sAttributes:", indent4);
1188 MSG("%soverwrite mode: %d", indent6, channel->attr.overwrite);
1189 MSG("%ssubbuffers size: %" PRIu64, indent6, channel->attr.subbuf_size);
1190 MSG("%snumber of subbuffers: %" PRIu64, indent6, channel->attr.num_subbuf);
1191 MSG("%sswitch timer interval: %u", indent6, channel->attr.switch_timer_interval);
1192 MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval);
1193 MSG("%strace file count: %" PRIu64, indent6, channel->attr.tracefile_count);
1194 MSG("%strace file size (bytes): %" PRIu64, indent6, channel->attr.tracefile_size);
1195 MSG("%sdiscarded events: %" PRIu64, indent6, discarded_events);
1196 MSG("%slost packets: %" PRIu64, indent6, lost_packets);
1197 switch (channel->attr.output) {
1198 case LTTNG_EVENT_SPLICE:
1199 MSG("%soutput: splice()", indent6);
1200 break;
1201 case LTTNG_EVENT_MMAP:
1202 MSG("%soutput: mmap()", indent6);
1203 break;
1204 }
1205 }
1206
1207 /*
1208 * Machine interface
1209 * Print a list of channel
1210 *
1211 */
1212 static int mi_list_channels(struct lttng_channel *channels, int count,
1213 const char *channel_name)
1214 {
1215 int i, ret;
1216 unsigned int chan_found = 0;
1217
1218 /* Open channels element */
1219 ret = mi_lttng_channels_open(writer);
1220 if (ret) {
1221 goto error;
1222 }
1223
1224 for (i = 0; i < count; i++) {
1225 if (channel_name != NULL) {
1226 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1227 chan_found = 1;
1228 } else {
1229 continue;
1230 }
1231 }
1232
1233 /* Write channel element and leave it open */
1234 ret = mi_lttng_channel(writer, &channels[i], 1);
1235 if (ret) {
1236 goto error;
1237 }
1238
1239 /* Listing events per channel */
1240 ret = list_events(channels[i].name);
1241 if (ret) {
1242 goto error;
1243 }
1244
1245 /* Closing the channel element we opened earlier */
1246 ret = mi_lttng_writer_close_element(writer);
1247 if (ret) {
1248 goto error;
1249 }
1250
1251 if (chan_found) {
1252 break;
1253 }
1254 }
1255
1256 /* Close channels element */
1257 ret = mi_lttng_writer_close_element(writer);
1258 if (ret) {
1259 goto error;
1260 }
1261
1262 error:
1263 return ret;
1264 }
1265
1266 /*
1267 * List channel(s) of session and domain.
1268 *
1269 * If channel_name is NULL, all channels are listed.
1270 */
1271 static int list_channels(const char *channel_name)
1272 {
1273 int count, i, ret = CMD_SUCCESS;
1274 unsigned int chan_found = 0;
1275 struct lttng_channel *channels = NULL;
1276
1277 DBG("Listing channel(s) (%s)", channel_name ? : "<all>");
1278
1279 count = lttng_list_channels(handle, &channels);
1280 if (count < 0) {
1281 switch (-count) {
1282 case LTTNG_ERR_KERN_CHAN_NOT_FOUND:
1283 if (lttng_opt_mi) {
1284 /* When printing mi this is not an error
1285 * but an empty channels element */
1286 count = 0;
1287 } else {
1288 ret = CMD_SUCCESS;
1289 WARN("No kernel channel");
1290 goto error_channels;
1291 }
1292 break;
1293 default:
1294 /* We had a real error */
1295 ret = CMD_ERROR;
1296 ERR("%s", lttng_strerror(count));
1297 goto error_channels;
1298 break;
1299 }
1300 }
1301
1302 if (lttng_opt_mi) {
1303 /* Mi print */
1304 ret = mi_list_channels(channels, count, channel_name);
1305 if (ret) {
1306 ret = CMD_ERROR;
1307 goto error;
1308 }
1309 } else {
1310 /* Pretty print */
1311 if (count) {
1312 MSG("Channels:\n-------------");
1313 }
1314
1315 for (i = 0; i < count; i++) {
1316 if (channel_name != NULL) {
1317 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1318 chan_found = 1;
1319 } else {
1320 continue;
1321 }
1322 }
1323 print_channel(&channels[i]);
1324
1325 /* Listing events per channel */
1326 ret = list_events(channels[i].name);
1327 if (ret) {
1328 goto error;
1329 }
1330
1331 if (chan_found) {
1332 break;
1333 }
1334 }
1335
1336 if (!chan_found && channel_name != NULL) {
1337 ret = CMD_ERROR;
1338 ERR("Channel %s not found", channel_name);
1339 goto error;
1340 }
1341 }
1342 error:
1343 free(channels);
1344
1345 error_channels:
1346 return ret;
1347 }
1348
1349 static
1350 const char *get_tracker_str(enum lttng_tracker_type tracker_type)
1351 {
1352 switch (tracker_type) {
1353 case LTTNG_TRACKER_PID:
1354 return "PID";
1355 case LTTNG_TRACKER_VPID:
1356 return "VPID";
1357 case LTTNG_TRACKER_UID:
1358 return "UID";
1359 case LTTNG_TRACKER_VUID:
1360 return "VUID";
1361 case LTTNG_TRACKER_GID:
1362 return "GID";
1363 case LTTNG_TRACKER_VGID:
1364 return "VGID";
1365 }
1366 return NULL;
1367 }
1368
1369 /*
1370 * List tracker ID(s) of session and domain.
1371 */
1372 static int list_tracker_ids(enum lttng_tracker_type tracker_type)
1373 {
1374 int ret = 0;
1375 int enabled = 1;
1376 struct lttng_tracker_id *ids = NULL;
1377 size_t nr_ids, i;
1378
1379 ret = lttng_list_tracker_ids(handle, tracker_type,
1380 &ids, &nr_ids);
1381 if (ret) {
1382 return ret;
1383 }
1384 if (nr_ids == 1 && ids[0].type == LTTNG_ID_ALL) {
1385 enabled = 0;
1386 }
1387 if (enabled) {
1388 _MSG("%s tracker: [", get_tracker_str(tracker_type));
1389
1390 /* Mi tracker_id element */
1391 if (writer) {
1392 /* Open tracker_id and targets elements */
1393 ret = mi_lttng_id_tracker_open(writer, tracker_type);
1394 if (ret) {
1395 goto end;
1396 }
1397 }
1398
1399 for (i = 0; i < nr_ids; i++) {
1400 struct lttng_tracker_id *id = &ids[i];
1401
1402 if (i) {
1403 _MSG(",");
1404 }
1405 switch (id->type) {
1406 case LTTNG_ID_ALL:
1407 _MSG(" *");
1408 break;
1409 case LTTNG_ID_VALUE:
1410 _MSG(" %d", ids[i].value);
1411 break;
1412 case LTTNG_ID_STRING:
1413 _MSG(" %s", ids[i].string);
1414 break;
1415 case LTTNG_ID_UNKNOWN:
1416 return CMD_ERROR;
1417 }
1418
1419 /* Mi */
1420 if (writer) {
1421 ret = mi_lttng_id_target(writer,
1422 tracker_type, id, 0);
1423 if (ret) {
1424 goto end;
1425 }
1426 }
1427 }
1428 _MSG(" ]\n\n");
1429
1430 /* Mi close tracker_id and targets */
1431 if (writer) {
1432 ret = mi_lttng_close_multi_element(writer, 2);
1433 if (ret) {
1434 goto end;
1435 }
1436 }
1437 }
1438 end:
1439 for (i = 0; i < nr_ids; i++) {
1440 free(ids[i].string);
1441 }
1442 free(ids);
1443 return ret;
1444 }
1445
1446 /*
1447 * List all trackers of a domain
1448 */
1449 static int list_trackers(struct lttng_domain *domain)
1450 {
1451 int ret;
1452
1453 /* Trackers listing */
1454 if (lttng_opt_mi) {
1455 ret = mi_lttng_trackers_open(writer);
1456 if (ret) {
1457 goto end;
1458 }
1459 }
1460
1461 switch (domain->type) {
1462 case LTTNG_DOMAIN_KERNEL:
1463 /* pid tracker */
1464 ret = list_tracker_ids(LTTNG_TRACKER_PID);
1465 if (ret) {
1466 goto end;
1467 }
1468 /* vpid tracker */
1469 ret = list_tracker_ids(LTTNG_TRACKER_VPID);
1470 if (ret) {
1471 goto end;
1472 }
1473 /* uid tracker */
1474 ret = list_tracker_ids(LTTNG_TRACKER_UID);
1475 if (ret) {
1476 goto end;
1477 }
1478 /* vuid tracker */
1479 ret = list_tracker_ids(LTTNG_TRACKER_VUID);
1480 if (ret) {
1481 goto end;
1482 }
1483 /* gid tracker */
1484 ret = list_tracker_ids(LTTNG_TRACKER_GID);
1485 if (ret) {
1486 goto end;
1487 }
1488 /* vgid tracker */
1489 ret = list_tracker_ids(LTTNG_TRACKER_VGID);
1490 if (ret) {
1491 goto end;
1492 }
1493 break;
1494 case LTTNG_DOMAIN_UST:
1495 /* vpid tracker */
1496 ret = list_tracker_ids(LTTNG_TRACKER_VPID);
1497 if (ret) {
1498 goto end;
1499 }
1500 /* vuid tracker */
1501 ret = list_tracker_ids(LTTNG_TRACKER_VUID);
1502 if (ret) {
1503 goto end;
1504 }
1505 /* vgid tracker */
1506 ret = list_tracker_ids(LTTNG_TRACKER_VGID);
1507 if (ret) {
1508 goto end;
1509 }
1510 break;
1511 default:
1512 break;
1513 }
1514 if (lttng_opt_mi) {
1515 /* Close trackers element */
1516 ret = mi_lttng_writer_close_element(writer);
1517 if (ret) {
1518 goto end;
1519 }
1520 }
1521
1522 end:
1523 return ret;
1524 }
1525
1526 /*
1527 * Machine interface
1528 * Find the session with session_name as name
1529 * and print his informations.
1530 */
1531 static int mi_list_session(const char *session_name,
1532 struct lttng_session *sessions, int count)
1533 {
1534 int ret, i;
1535 unsigned int session_found = 0;
1536
1537 if (session_name == NULL) {
1538 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1539 goto end;
1540 }
1541
1542 for (i = 0; i < count; i++) {
1543 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1544 /* We need to leave it open to append other informations
1545 * like domain, channel, events etc.*/
1546 session_found = 1;
1547 ret = mi_lttng_session(writer, &sessions[i], 1);
1548 if (ret) {
1549 goto end;
1550 }
1551 break;
1552 }
1553 }
1554
1555 if (!session_found) {
1556 ERR("Session '%s' not found", session_name);
1557 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1558 goto end;
1559 }
1560
1561 end:
1562 return ret;
1563 }
1564
1565 /*
1566 * Machine interface
1567 * List all availables session
1568 */
1569 static int mi_list_sessions(struct lttng_session *sessions, int count)
1570 {
1571 int ret, i;
1572
1573 /* Opening sessions element */
1574 ret = mi_lttng_sessions_open(writer);
1575 if (ret) {
1576 goto end;
1577 }
1578
1579 /* Listing sessions */
1580 for (i = 0; i < count; i++) {
1581 ret = mi_lttng_session(writer, &sessions[i], 0);
1582 if (ret) {
1583 goto end;
1584 }
1585 }
1586
1587 /* Closing sessions element */
1588 ret = mi_lttng_writer_close_element(writer);
1589 if (ret) {
1590 goto end;
1591 }
1592
1593 end:
1594 return ret;
1595 }
1596
1597 /*
1598 * List available tracing session. List only basic information.
1599 *
1600 * If session_name is NULL, all sessions are listed.
1601 */
1602 static int list_sessions(const char *session_name)
1603 {
1604 int ret = CMD_SUCCESS;
1605 int count, i;
1606 unsigned int session_found = 0;
1607 struct lttng_session *sessions;
1608
1609 count = lttng_list_sessions(&sessions);
1610 DBG("Session count %d", count);
1611 if (count < 0) {
1612 ret = CMD_ERROR;
1613 ERR("%s", lttng_strerror(count));
1614 goto end;
1615 }
1616
1617 if (lttng_opt_mi) {
1618 /* Mi */
1619 if (session_name == NULL) {
1620 /* List all session */
1621 ret = mi_list_sessions(sessions, count);
1622 } else {
1623 /* Note : this return an open session element */
1624 ret = mi_list_session(session_name, sessions, count);
1625 }
1626 if (ret) {
1627 ret = CMD_ERROR;
1628 goto error;
1629 }
1630 } else {
1631 /* Pretty print */
1632 if (count == 0) {
1633 MSG("Currently no available tracing session");
1634 goto end;
1635 }
1636
1637 if (session_name == NULL) {
1638 MSG("Available tracing sessions:");
1639 }
1640
1641
1642 for (i = 0; i < count; i++) {
1643 if (session_name != NULL) {
1644 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1645 session_found = 1;
1646 MSG("Tracing session %s: [%s%s]", session_name,
1647 active_string(sessions[i].enabled),
1648 snapshot_string(sessions[i].snapshot_mode));
1649 MSG("%sTrace path: %s\n", indent4, sessions[i].path);
1650 break;
1651 }
1652 } else {
1653 MSG(" %d) %s (%s) [%s%s]", i + 1,
1654 sessions[i].name, sessions[i].path,
1655 active_string(sessions[i].enabled),
1656 snapshot_string(sessions[i].snapshot_mode));
1657 MSG("%sTrace path: %s", indent4, sessions[i].path);
1658 if (sessions[i].live_timer_interval != 0) {
1659 MSG("%sLive timer interval (usec): %u", indent4,
1660 sessions[i].live_timer_interval);
1661 }
1662 MSG("");
1663 }
1664 }
1665
1666 if (!session_found && session_name != NULL) {
1667 ERR("Session '%s' not found", session_name);
1668 ret = CMD_ERROR;
1669 goto error;
1670 }
1671
1672 if (session_name == NULL) {
1673 MSG("\nUse lttng list <session_name> for more details");
1674 }
1675 }
1676
1677 error:
1678 free(sessions);
1679 end:
1680 return ret;
1681 }
1682
1683
1684 /*
1685 * Machine Interface
1686 * list available domain(s) for a session.
1687 */
1688 static int mi_list_domains(struct lttng_domain *domains, int count)
1689 {
1690 int i, ret;
1691 /* Open domains element */
1692 ret = mi_lttng_domains_open(writer);
1693 if (ret) {
1694 goto end;
1695 }
1696
1697 for (i = 0; i < count; i++) {
1698 ret = mi_lttng_domain(writer, &domains[i] , 0);
1699 if (ret) {
1700 goto end;
1701 }
1702 }
1703
1704 /* Closing domains element */
1705 ret = mi_lttng_writer_close_element(writer);
1706 if (ret) {
1707 goto end;
1708 }
1709 end:
1710 return ret;
1711 }
1712
1713 /*
1714 * List available domain(s) for a session.
1715 */
1716 static int list_domains(const char *session_name)
1717 {
1718 int i, count, ret = CMD_SUCCESS;
1719 struct lttng_domain *domains = NULL;
1720
1721
1722 count = lttng_list_domains(session_name, &domains);
1723 if (count < 0) {
1724 ret = CMD_ERROR;
1725 ERR("%s", lttng_strerror(count));
1726 goto end;
1727 }
1728
1729 if (lttng_opt_mi) {
1730 /* Mi output */
1731 ret = mi_list_domains(domains, count);
1732 if (ret) {
1733 ret = CMD_ERROR;
1734 goto error;
1735 }
1736 } else {
1737 /* Pretty print */
1738 MSG("Domains:\n-------------");
1739 if (count == 0) {
1740 MSG(" None");
1741 goto end;
1742 }
1743
1744 for (i = 0; i < count; i++) {
1745 switch (domains[i].type) {
1746 case LTTNG_DOMAIN_KERNEL:
1747 MSG(" - Kernel");
1748 break;
1749 case LTTNG_DOMAIN_UST:
1750 MSG(" - UST global");
1751 break;
1752 case LTTNG_DOMAIN_JUL:
1753 MSG(" - JUL (Java Util Logging)");
1754 break;
1755 case LTTNG_DOMAIN_LOG4J:
1756 MSG(" - LOG4j (Logging for Java)");
1757 break;
1758 case LTTNG_DOMAIN_PYTHON:
1759 MSG(" - Python (logging)");
1760 break;
1761 default:
1762 break;
1763 }
1764 }
1765 }
1766
1767 error:
1768 free(domains);
1769
1770 end:
1771 return ret;
1772 }
1773
1774 /*
1775 * The 'list <options>' first level command
1776 */
1777 int cmd_list(int argc, const char **argv)
1778 {
1779 int opt, ret = CMD_SUCCESS;
1780 const char *session_name, *leftover = NULL;
1781 static poptContext pc;
1782 struct lttng_domain domain;
1783 struct lttng_domain *domains = NULL;
1784
1785 memset(&domain, 0, sizeof(domain));
1786
1787 if (argc < 1) {
1788 ret = CMD_ERROR;
1789 goto end;
1790 }
1791
1792 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1793 poptReadDefaultConfig(pc, 0);
1794
1795 while ((opt = poptGetNextOpt(pc)) != -1) {
1796 switch (opt) {
1797 case OPT_HELP:
1798 SHOW_HELP();
1799 goto end;
1800 case OPT_USERSPACE:
1801 opt_userspace = 1;
1802 break;
1803 case OPT_LIST_OPTIONS:
1804 list_cmd_options(stdout, long_options);
1805 goto end;
1806 default:
1807 ret = CMD_UNDEFINED;
1808 goto end;
1809 }
1810 }
1811
1812 /* Mi check */
1813 if (lttng_opt_mi) {
1814 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1815 if (!writer) {
1816 ret = CMD_ERROR;
1817 goto end;
1818 }
1819
1820 /* Open command element */
1821 ret = mi_lttng_writer_command_open(writer,
1822 mi_lttng_element_command_list);
1823 if (ret) {
1824 ret = CMD_ERROR;
1825 goto end;
1826 }
1827
1828 /* Open output element */
1829 ret = mi_lttng_writer_open_element(writer,
1830 mi_lttng_element_command_output);
1831 if (ret) {
1832 ret = CMD_ERROR;
1833 goto end;
1834 }
1835 }
1836
1837 /* Get session name (trailing argument) */
1838 session_name = poptGetArg(pc);
1839 DBG2("Session name: %s", session_name);
1840
1841 leftover = poptGetArg(pc);
1842 if (leftover) {
1843 ERR("Unknown argument: %s", leftover);
1844 ret = CMD_ERROR;
1845 goto end;
1846 }
1847
1848 if (opt_kernel) {
1849 domain.type = LTTNG_DOMAIN_KERNEL;
1850 } else if (opt_userspace) {
1851 DBG2("Listing userspace global domain");
1852 domain.type = LTTNG_DOMAIN_UST;
1853 } else if (opt_jul) {
1854 DBG2("Listing JUL domain");
1855 domain.type = LTTNG_DOMAIN_JUL;
1856 } else if (opt_log4j) {
1857 domain.type = LTTNG_DOMAIN_LOG4J;
1858 } else if (opt_python) {
1859 domain.type = LTTNG_DOMAIN_PYTHON;
1860 }
1861
1862 if (!opt_kernel && opt_syscall) {
1863 WARN("--syscall will only work with the Kernel domain (-k)");
1864 ret = CMD_ERROR;
1865 goto end;
1866 }
1867
1868 if (opt_kernel || opt_userspace || opt_jul || opt_log4j || opt_python) {
1869 handle = lttng_create_handle(session_name, &domain);
1870 if (handle == NULL) {
1871 ret = CMD_FATAL;
1872 goto end;
1873 }
1874 }
1875
1876 if (session_name == NULL) {
1877 if (!opt_kernel && !opt_userspace && !opt_jul && !opt_log4j
1878 && !opt_python) {
1879 ret = list_sessions(NULL);
1880 if (ret) {
1881 goto end;
1882 }
1883 }
1884 if (opt_kernel) {
1885 if (opt_syscall) {
1886 ret = list_syscalls();
1887 if (ret) {
1888 goto end;
1889 }
1890 } else {
1891 ret = list_kernel_events();
1892 if (ret) {
1893 goto end;
1894 }
1895 }
1896 }
1897 if (opt_userspace) {
1898 if (opt_fields) {
1899 ret = list_ust_event_fields();
1900 } else {
1901 ret = list_ust_events();
1902 }
1903 if (ret) {
1904 goto end;
1905 }
1906 }
1907 if (opt_jul || opt_log4j || opt_python) {
1908 ret = list_agent_events();
1909 if (ret) {
1910 goto end;
1911 }
1912 }
1913 } else {
1914 /* List session attributes */
1915 if (lttng_opt_mi) {
1916 /* Open element sessions
1917 * Present for xml consistency */
1918 ret = mi_lttng_sessions_open(writer);
1919 if (ret) {
1920 goto end;
1921 }
1922 }
1923 /* MI: the ouptut of list_sessions is an unclosed session element */
1924 ret = list_sessions(session_name);
1925 if (ret) {
1926 goto end;
1927 }
1928
1929 /* Domain listing */
1930 if (opt_domain) {
1931 ret = list_domains(session_name);
1932 goto end;
1933 }
1934
1935 /* Channel listing */
1936 if (opt_kernel || opt_userspace) {
1937 if (lttng_opt_mi) {
1938 /* Add of domains and domain element for xml
1939 * consistency and validation
1940 */
1941 ret = mi_lttng_domains_open(writer);
1942 if (ret) {
1943 goto end;
1944 }
1945
1946 /* Open domain and leave it open for
1947 * nested channels printing */
1948 ret = mi_lttng_domain(writer, &domain, 1);
1949 if (ret) {
1950 goto end;
1951 }
1952
1953 }
1954
1955
1956 /* Trackers */
1957 ret = list_trackers(&domain);
1958 if (ret) {
1959 goto end;
1960 }
1961
1962 /* Channels */
1963 ret = list_channels(opt_channel);
1964 if (ret) {
1965 goto end;
1966 }
1967
1968 if (lttng_opt_mi) {
1969 /* Close domain and domain element */
1970 ret = mi_lttng_close_multi_element(writer, 2);
1971 }
1972 if (ret) {
1973 goto end;
1974 }
1975
1976
1977 } else {
1978 int i, nb_domain;
1979
1980 /* We want all domain(s) */
1981 nb_domain = lttng_list_domains(session_name, &domains);
1982 if (nb_domain < 0) {
1983 ret = CMD_ERROR;
1984 ERR("%s", lttng_strerror(nb_domain));
1985 goto end;
1986 }
1987
1988 if (lttng_opt_mi) {
1989 ret = mi_lttng_domains_open(writer);
1990 if (ret) {
1991 ret = CMD_ERROR;
1992 goto end;
1993 }
1994 }
1995
1996 for (i = 0; i < nb_domain; i++) {
1997 switch (domains[i].type) {
1998 case LTTNG_DOMAIN_KERNEL:
1999 MSG("=== Domain: Kernel ===\n");
2000 break;
2001 case LTTNG_DOMAIN_UST:
2002 MSG("=== Domain: UST global ===\n");
2003 MSG("Buffer type: %s\n",
2004 domains[i].buf_type ==
2005 LTTNG_BUFFER_PER_PID ? "per PID" : "per UID");
2006 break;
2007 case LTTNG_DOMAIN_JUL:
2008 MSG("=== Domain: JUL (Java Util Logging) ===\n");
2009 break;
2010 case LTTNG_DOMAIN_LOG4J:
2011 MSG("=== Domain: LOG4j (Logging for Java) ===\n");
2012 break;
2013 case LTTNG_DOMAIN_PYTHON:
2014 MSG("=== Domain: Python (logging) ===\n");
2015 break;
2016 default:
2017 MSG("=== Domain: Unimplemented ===\n");
2018 break;
2019 }
2020
2021 if (lttng_opt_mi) {
2022 ret = mi_lttng_domain(writer, &domains[i], 1);
2023 if (ret) {
2024 ret = CMD_ERROR;
2025 goto end;
2026 }
2027 }
2028
2029 /* Clean handle before creating a new one */
2030 if (handle) {
2031 lttng_destroy_handle(handle);
2032 }
2033
2034 handle = lttng_create_handle(session_name, &domains[i]);
2035 if (handle == NULL) {
2036 ret = CMD_FATAL;
2037 goto end;
2038 }
2039
2040 if (domains[i].type == LTTNG_DOMAIN_JUL ||
2041 domains[i].type == LTTNG_DOMAIN_LOG4J ||
2042 domains[i].type == LTTNG_DOMAIN_PYTHON) {
2043 ret = list_session_agent_events();
2044 if (ret) {
2045 goto end;
2046 }
2047
2048 goto next_domain;
2049 }
2050
2051 switch (domains[i].type) {
2052 case LTTNG_DOMAIN_KERNEL:
2053 case LTTNG_DOMAIN_UST:
2054 ret = list_trackers(&domains[i]);
2055 if (ret) {
2056 goto end;
2057 }
2058 break;
2059 default:
2060 break;
2061 }
2062
2063 ret = list_channels(opt_channel);
2064 if (ret) {
2065 goto end;
2066 }
2067
2068 next_domain:
2069 if (lttng_opt_mi) {
2070 /* Close domain element */
2071 ret = mi_lttng_writer_close_element(writer);
2072 if (ret) {
2073 ret = CMD_ERROR;
2074 goto end;
2075 }
2076 }
2077
2078 }
2079 if (lttng_opt_mi) {
2080 /* Close the domains, session and sessions element */
2081 ret = mi_lttng_close_multi_element(writer, 3);
2082 if (ret) {
2083 ret = CMD_ERROR;
2084 goto end;
2085 }
2086 }
2087 }
2088 }
2089
2090 /* Mi closing */
2091 if (lttng_opt_mi) {
2092 /* Close output element */
2093 ret = mi_lttng_writer_close_element(writer);
2094 if (ret) {
2095 ret = CMD_ERROR;
2096 goto end;
2097 }
2098
2099 /* Command element close */
2100 ret = mi_lttng_writer_command_close(writer);
2101 if (ret) {
2102 ret = CMD_ERROR;
2103 goto end;
2104 }
2105 }
2106 end:
2107 /* Mi clean-up */
2108 if (writer && mi_lttng_writer_destroy(writer)) {
2109 /* Preserve original error code */
2110 ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
2111 }
2112
2113 free(domains);
2114 if (handle) {
2115 lttng_destroy_handle(handle);
2116 }
2117
2118 poptFreeContext(pc);
2119 return ret;
2120 }
LTTng tools - Deliverables
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