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[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 _GNU_SOURCE
19 #define _LGPL_SOURCE
20 #include <inttypes.h>
21 #include <popt.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <assert.h>
26
27 #include <common/mi-lttng.h>
28 #include <lttng/constant.h>
29
30 #include "../command.h"
31
32 static int opt_userspace;
33 static int opt_kernel;
34 static int opt_jul;
35 static int opt_log4j;
36 static int opt_python;
37 static char *opt_channel;
38 static int opt_domain;
39 static int opt_fields;
40 static int opt_syscall;
41
42 const char *indent4 = " ";
43 const char *indent6 = " ";
44 const char *indent8 = " ";
45
46 enum {
47 OPT_HELP = 1,
48 OPT_USERSPACE,
49 OPT_LIST_OPTIONS,
50 };
51
52 static struct lttng_handle *handle;
53 static struct mi_writer *writer;
54
55 static struct poptOption long_options[] = {
56 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
57 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
58 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
59 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
60 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
61 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
62 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
63 {"channel", 'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0},
64 {"domain", 'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0},
65 {"fields", 'f', POPT_ARG_VAL, &opt_fields, 1, 0, 0},
66 {"syscall", 'S', POPT_ARG_VAL, &opt_syscall, 1, 0, 0},
67 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
68 {0, 0, 0, 0, 0, 0, 0}
69 };
70
71 /*
72 * usage
73 */
74 static void usage(FILE *ofp)
75 {
76 fprintf(ofp, "usage: lttng list [OPTIONS] [SESSION [SESSION OPTIONS]]\n");
77 fprintf(ofp, "\n");
78 fprintf(ofp, "With no arguments, list available tracing session(s)\n");
79 fprintf(ofp, "\n");
80 fprintf(ofp, "Without a session, -k lists available kernel events\n");
81 fprintf(ofp, "Without a session, -u lists available userspace events\n");
82 fprintf(ofp, "\n");
83 fprintf(ofp, " -h, --help Show this help\n");
84 fprintf(ofp, " --list-options Simple listing of options\n");
85 fprintf(ofp, " -k, --kernel Select kernel domain\n");
86 fprintf(ofp, " -u, --userspace Select user-space domain.\n");
87 fprintf(ofp, " -j, --jul Apply for Java application using JUL\n");
88 fprintf(ofp, " -l, --log4j Apply for Java application using LOG4J\n");
89 fprintf(ofp, " -p, --python Apply for Python application using logging\n");
90 fprintf(ofp, " -f, --fields List event fields.\n");
91 fprintf(ofp, " --syscall List available system calls.\n");
92 fprintf(ofp, "\n");
93 fprintf(ofp, "Session Options:\n");
94 fprintf(ofp, " -c, --channel NAME List details of a channel\n");
95 fprintf(ofp, " -d, --domain List available domain(s)\n");
96 fprintf(ofp, "\n");
97 }
98
99 /*
100 * Get command line from /proc for a specific pid.
101 *
102 * On success, return an allocated string pointer to the proc cmdline.
103 * On error, return NULL.
104 */
105 static char *get_cmdline_by_pid(pid_t pid)
106 {
107 int ret;
108 FILE *fp = NULL;
109 char *cmdline = NULL;
110 /* Can't go bigger than /proc/LTTNG_MAX_PID/cmdline */
111 char path[sizeof("/proc//cmdline") + sizeof(LTTNG_MAX_PID_STR) - 1];
112
113 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
114 fp = fopen(path, "r");
115 if (fp == NULL) {
116 goto end;
117 }
118
119 /* Caller must free() *cmdline */
120 cmdline = zmalloc(PATH_MAX);
121 if (!cmdline) {
122 PERROR("malloc cmdline");
123 goto end;
124 }
125 ret = fread(cmdline, 1, PATH_MAX, fp);
126 if (ret < 0) {
127 PERROR("fread proc list");
128 }
129
130 end:
131 if (fp) {
132 fclose(fp);
133 }
134 return cmdline;
135 }
136
137 static
138 const char *active_string(int value)
139 {
140 switch (value) {
141 case 0: return "inactive";
142 case 1: return "active";
143 case -1: return "";
144 default: return NULL;
145 }
146 }
147
148 static const char *snapshot_string(int value)
149 {
150 switch (value) {
151 case 1:
152 return " snapshot";
153 default:
154 return "";
155 }
156 }
157
158 static
159 const char *enabled_string(int value)
160 {
161 switch (value) {
162 case 0: return " [disabled]";
163 case 1: return " [enabled]";
164 case -1: return "";
165 default: return NULL;
166 }
167 }
168
169 static
170 const char *filter_string(int value)
171 {
172 switch (value) {
173 case 1: return " [with filter]";
174 default: return "";
175 }
176 }
177
178 static
179 const char *exclusion_string(int value)
180 {
181 switch (value) {
182 case 1: return " [has exclusions]";
183 default: return "";
184 }
185 }
186
187 static const char *logleveltype_string(enum lttng_loglevel_type value)
188 {
189 switch (value) {
190 case LTTNG_EVENT_LOGLEVEL_ALL:
191 return ":";
192 case LTTNG_EVENT_LOGLEVEL_RANGE:
193 return " <=";
194 case LTTNG_EVENT_LOGLEVEL_SINGLE:
195 return " ==";
196 default:
197 return " <<TYPE UNKN>>";
198 }
199 }
200
201 static const char *bitness_event(enum lttng_event_flag flags)
202 {
203 if (flags & LTTNG_EVENT_FLAG_SYSCALL_32) {
204 if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
205 return " [32/64-bit]";
206 } else {
207 return " [32-bit]";
208 }
209 } else if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
210 return " [64-bit]";
211 } else {
212 return "";
213 }
214 }
215
216 /*
217 * Pretty print single event.
218 */
219 static void print_events(struct lttng_event *event)
220 {
221 switch (event->type) {
222 case LTTNG_EVENT_TRACEPOINT:
223 {
224 if (event->loglevel != -1) {
225 MSG("%s%s (loglevel%s %s (%d)) (type: tracepoint)%s%s%s",
226 indent6,
227 event->name,
228 logleveltype_string(event->loglevel_type),
229 mi_lttng_loglevel_string(event->loglevel, handle->domain.type),
230 event->loglevel,
231 enabled_string(event->enabled),
232 exclusion_string(event->exclusion),
233 filter_string(event->filter));
234 } else {
235 MSG("%s%s (type: tracepoint)%s%s%s",
236 indent6,
237 event->name,
238 enabled_string(event->enabled),
239 exclusion_string(event->exclusion),
240 filter_string(event->filter));
241 }
242 break;
243 }
244 case LTTNG_EVENT_FUNCTION:
245 MSG("%s%s (type: function)%s%s", indent6,
246 event->name, enabled_string(event->enabled),
247 filter_string(event->filter));
248 if (event->attr.probe.addr != 0) {
249 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
250 } else {
251 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
252 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
253 }
254 break;
255 case LTTNG_EVENT_PROBE:
256 MSG("%s%s (type: probe)%s%s", indent6,
257 event->name, enabled_string(event->enabled),
258 filter_string(event->filter));
259 if (event->attr.probe.addr != 0) {
260 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
261 } else {
262 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
263 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
264 }
265 break;
266 case LTTNG_EVENT_FUNCTION_ENTRY:
267 MSG("%s%s (type: function)%s%s", indent6,
268 event->name, enabled_string(event->enabled),
269 filter_string(event->filter));
270 MSG("%ssymbol: \"%s\"", indent8, event->attr.ftrace.symbol_name);
271 break;
272 case LTTNG_EVENT_SYSCALL:
273 MSG("%s%s%s%s%s", indent6, event->name,
274 (opt_syscall ? "" : " (type:syscall)"),
275 enabled_string(event->enabled),
276 bitness_event(event->flags));
277 break;
278 case LTTNG_EVENT_NOOP:
279 MSG("%s (type: noop)%s%s", indent6,
280 enabled_string(event->enabled),
281 filter_string(event->filter));
282 break;
283 case LTTNG_EVENT_ALL:
284 /* We should never have "all" events in list. */
285 assert(0);
286 break;
287 }
288 }
289
290 static const char *field_type(struct lttng_event_field *field)
291 {
292 switch(field->type) {
293 case LTTNG_EVENT_FIELD_INTEGER:
294 return "integer";
295 case LTTNG_EVENT_FIELD_ENUM:
296 return "enum";
297 case LTTNG_EVENT_FIELD_FLOAT:
298 return "float";
299 case LTTNG_EVENT_FIELD_STRING:
300 return "string";
301 case LTTNG_EVENT_FIELD_OTHER:
302 default: /* fall-through */
303 return "unknown";
304 }
305 }
306
307 /*
308 * Pretty print single event fields.
309 */
310 static void print_event_field(struct lttng_event_field *field)
311 {
312 if (!field->field_name[0]) {
313 return;
314 }
315 MSG("%sfield: %s (%s)%s", indent8, field->field_name,
316 field_type(field), field->nowrite ? " [no write]" : "");
317 }
318
319 /*
320 * Machine interface
321 * Jul and ust event listing
322 */
323 static int mi_list_agent_ust_events(struct lttng_event *events, int count,
324 struct lttng_domain *domain)
325 {
326 int ret, i;
327 pid_t cur_pid = 0;
328 char *cmdline = NULL;
329 int pid_element_open = 0;
330
331 /* Open domains element */
332 ret = mi_lttng_domains_open(writer);
333 if (ret) {
334 goto end;
335 }
336
337 /* Write domain */
338 ret = mi_lttng_domain(writer, domain, 1);
339 if (ret) {
340 goto end;
341 }
342
343 /* Open pids element element */
344 ret = mi_lttng_pids_open(writer);
345 if (ret) {
346 goto end;
347 }
348
349 for (i = 0; i < count; i++) {
350 if (cur_pid != events[i].pid) {
351 if (pid_element_open) {
352 /* Close the previous events and pid element */
353 ret = mi_lttng_close_multi_element(writer, 2);
354 if (ret) {
355 goto end;
356 }
357 pid_element_open = 0;
358 }
359
360 cur_pid = events[i].pid;
361 cmdline = get_cmdline_by_pid(cur_pid);
362 if (!cmdline) {
363 ret = CMD_ERROR;
364 goto end;
365 }
366
367 if (!pid_element_open) {
368 /* Open and write a pid element */
369 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
370 if (ret) {
371 goto error;
372 }
373
374 /* Open events element */
375 ret = mi_lttng_events_open(writer);
376 if (ret) {
377 goto error;
378 }
379
380 pid_element_open = 1;
381 }
382 free(cmdline);
383 }
384
385 /* Write an event */
386 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
387 if (ret) {
388 goto end;
389 }
390 }
391
392 /* Close pids */
393 ret = mi_lttng_writer_close_element(writer);
394 if (ret) {
395 goto end;
396 }
397
398 /* Close domain, domains */
399 ret = mi_lttng_close_multi_element(writer, 2);
400 end:
401 return ret;
402 error:
403 free(cmdline);
404 return ret;
405 }
406
407 static int list_agent_events(void)
408 {
409 int i, size, ret = CMD_SUCCESS;
410 struct lttng_domain domain;
411 struct lttng_handle *handle = NULL;
412 struct lttng_event *event_list = NULL;
413 pid_t cur_pid = 0;
414 char *cmdline = NULL;
415 const char *agent_domain_str;
416
417 memset(&domain, 0, sizeof(domain));
418 if (opt_jul) {
419 domain.type = LTTNG_DOMAIN_JUL;
420 } else if (opt_log4j) {
421 domain.type = LTTNG_DOMAIN_LOG4J;
422 } else if (opt_python) {
423 domain.type = LTTNG_DOMAIN_PYTHON;
424 } else {
425 ERR("Invalid agent domain selected.");
426 ret = CMD_ERROR;
427 goto error;
428 }
429
430 agent_domain_str = get_domain_str(domain.type);
431
432 DBG("Getting %s tracing events", agent_domain_str);
433
434 handle = lttng_create_handle(NULL, &domain);
435 if (handle == NULL) {
436 ret = CMD_ERROR;
437 goto end;
438 }
439
440 size = lttng_list_tracepoints(handle, &event_list);
441 if (size < 0) {
442 ERR("Unable to list %s events: %s", agent_domain_str,
443 lttng_strerror(size));
444 ret = CMD_ERROR;
445 goto end;
446 }
447
448 if (lttng_opt_mi) {
449 /* Mi print */
450 ret = mi_list_agent_ust_events(event_list, size, &domain);
451 if (ret) {
452 ret = CMD_ERROR;
453 goto error;
454 }
455 } else {
456 /* Pretty print */
457 MSG("%s events (Logger name):\n-------------------------",
458 agent_domain_str);
459
460 if (size == 0) {
461 MSG("None");
462 }
463
464 for (i = 0; i < size; i++) {
465 if (cur_pid != event_list[i].pid) {
466 cur_pid = event_list[i].pid;
467 cmdline = get_cmdline_by_pid(cur_pid);
468 if (cmdline == NULL) {
469 ret = CMD_ERROR;
470 goto error;
471 }
472 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
473 free(cmdline);
474 }
475 MSG("%s- %s", indent6, event_list[i].name);
476 }
477
478 MSG("");
479 }
480
481 error:
482 free(event_list);
483 end:
484 lttng_destroy_handle(handle);
485 return ret;
486 }
487
488 /*
489 * Ask session daemon for all user space tracepoints available.
490 */
491 static int list_ust_events(void)
492 {
493 int i, size, ret = CMD_SUCCESS;
494 struct lttng_domain domain;
495 struct lttng_handle *handle;
496 struct lttng_event *event_list = NULL;
497 pid_t cur_pid = 0;
498 char *cmdline = NULL;
499
500 memset(&domain, 0, sizeof(domain));
501
502 DBG("Getting UST tracing events");
503
504 domain.type = LTTNG_DOMAIN_UST;
505
506 handle = lttng_create_handle(NULL, &domain);
507 if (handle == NULL) {
508 ret = CMD_ERROR;
509 goto end;
510 }
511
512 size = lttng_list_tracepoints(handle, &event_list);
513 if (size < 0) {
514 ERR("Unable to list UST events: %s", lttng_strerror(size));
515 ret = CMD_ERROR;
516 goto error;
517 }
518
519 if (lttng_opt_mi) {
520 /* Mi print */
521 ret = mi_list_agent_ust_events(event_list, size, &domain);
522 } else {
523 /* Pretty print */
524 MSG("UST events:\n-------------");
525
526 if (size == 0) {
527 MSG("None");
528 }
529
530 for (i = 0; i < size; i++) {
531 if (cur_pid != event_list[i].pid) {
532 cur_pid = event_list[i].pid;
533 cmdline = get_cmdline_by_pid(cur_pid);
534 if (cmdline == NULL) {
535 ret = CMD_ERROR;
536 goto error;
537 }
538 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
539 free(cmdline);
540 }
541 print_events(&event_list[i]);
542 }
543
544 MSG("");
545 }
546
547 error:
548 free(event_list);
549 end:
550 lttng_destroy_handle(handle);
551 return ret;
552 }
553
554 /*
555 * Machine interface
556 * List all ust event with their fields
557 */
558 static int mi_list_ust_event_fields(struct lttng_event_field *fields, int count,
559 struct lttng_domain *domain)
560 {
561 int ret, i;
562 pid_t cur_pid = 0;
563 char *cmdline = NULL;
564 int pid_element_open = 0;
565 int event_element_open = 0;
566 struct lttng_event cur_event;
567
568 memset(&cur_event, 0, sizeof(cur_event));
569
570 /* Open domains element */
571 ret = mi_lttng_domains_open(writer);
572 if (ret) {
573 goto end;
574 }
575
576 /* Write domain */
577 ret = mi_lttng_domain(writer, domain, 1);
578 if (ret) {
579 goto end;
580 }
581
582 /* Open pids element */
583 ret = mi_lttng_pids_open(writer);
584 if (ret) {
585 goto end;
586 }
587
588 for (i = 0; i < count; i++) {
589 if (cur_pid != fields[i].event.pid) {
590 if (pid_element_open) {
591 if (event_element_open) {
592
593 /* Close the previous field element and event. */
594 ret = mi_lttng_close_multi_element(writer, 2);
595 if (ret) {
596 goto end;
597 }
598 event_element_open = 0;
599 }
600 /* Close the previous events, pid element */
601 ret = mi_lttng_close_multi_element(writer, 2);
602 if (ret) {
603 goto end;
604 }
605 pid_element_open = 0;
606 }
607
608 cur_pid = fields[i].event.pid;
609 cmdline = get_cmdline_by_pid(cur_pid);
610 if (!pid_element_open) {
611 /* Open and write a pid element */
612 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
613 if (ret) {
614 goto error;
615 }
616
617 /* Open events element */
618 ret = mi_lttng_events_open(writer);
619 if (ret) {
620 goto error;
621 }
622 pid_element_open = 1;
623 }
624 free(cmdline);
625 /* Wipe current event since we are about to print a new PID. */
626 memset(&cur_event, 0, sizeof(cur_event));
627 }
628
629 if (strcmp(cur_event.name, fields[i].event.name) != 0) {
630 if (event_element_open) {
631 /* Close the previous fields element and the previous event */
632 ret = mi_lttng_close_multi_element(writer, 2);
633 if (ret) {
634 goto end;
635 }
636 event_element_open = 0;
637 }
638
639 memcpy(&cur_event, &fields[i].event,
640 sizeof(cur_event));
641
642 if (!event_element_open) {
643 /* Open and write the event */
644 ret = mi_lttng_event(writer, &cur_event, 1,
645 handle->domain.type);
646 if (ret) {
647 goto end;
648 }
649
650 /* Open a fields element */
651 ret = mi_lttng_event_fields_open(writer);
652 if (ret) {
653 goto end;
654 }
655 event_element_open = 1;
656 }
657 }
658
659 /* Print the event_field */
660 ret = mi_lttng_event_field(writer, &fields[i]);
661 if (ret) {
662 goto end;
663 }
664 }
665
666 /* Close pid, domain, domains */
667 ret = mi_lttng_close_multi_element(writer, 3);
668 end:
669 return ret;
670 error:
671 free(cmdline);
672 return ret;
673 }
674
675 /*
676 * Ask session daemon for all user space tracepoint fields available.
677 */
678 static int list_ust_event_fields(void)
679 {
680 int i, size, ret = CMD_SUCCESS;
681 struct lttng_domain domain;
682 struct lttng_handle *handle;
683 struct lttng_event_field *event_field_list;
684 pid_t cur_pid = 0;
685 char *cmdline = NULL;
686
687 struct lttng_event cur_event;
688
689 memset(&domain, 0, sizeof(domain));
690 memset(&cur_event, 0, sizeof(cur_event));
691
692 DBG("Getting UST tracing event fields");
693
694 domain.type = LTTNG_DOMAIN_UST;
695
696 handle = lttng_create_handle(NULL, &domain);
697 if (handle == NULL) {
698 ret = CMD_ERROR;
699 goto end;
700 }
701
702 size = lttng_list_tracepoint_fields(handle, &event_field_list);
703 if (size < 0) {
704 ERR("Unable to list UST event fields: %s", lttng_strerror(size));
705 ret = CMD_ERROR;
706 goto end;
707 }
708
709 if (lttng_opt_mi) {
710 /* Mi print */
711 ret = mi_list_ust_event_fields(event_field_list, size, &domain);
712 if (ret) {
713 ret = CMD_ERROR;
714 goto error;
715 }
716 } else {
717 /* Pretty print */
718 MSG("UST events:\n-------------");
719
720 if (size == 0) {
721 MSG("None");
722 }
723
724 for (i = 0; i < size; i++) {
725 if (cur_pid != event_field_list[i].event.pid) {
726 cur_pid = event_field_list[i].event.pid;
727 cmdline = get_cmdline_by_pid(cur_pid);
728 if (cmdline == NULL) {
729 ret = CMD_ERROR;
730 goto error;
731 }
732 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
733 free(cmdline);
734 /* Wipe current event since we are about to print a new PID. */
735 memset(&cur_event, 0, sizeof(cur_event));
736 }
737 if (strcmp(cur_event.name, event_field_list[i].event.name) != 0) {
738 print_events(&event_field_list[i].event);
739 memcpy(&cur_event, &event_field_list[i].event,
740 sizeof(cur_event));
741 }
742 print_event_field(&event_field_list[i]);
743 }
744
745 MSG("");
746 }
747
748 error:
749 free(event_field_list);
750 end:
751 lttng_destroy_handle(handle);
752 return ret;
753 }
754
755 /*
756 * Machine interface
757 * Print a list of kernel events
758 */
759 static int mi_list_kernel_events(struct lttng_event *events, int count,
760 struct lttng_domain *domain)
761 {
762 int ret, i;
763
764 /* Open domains element */
765 ret = mi_lttng_domains_open(writer);
766 if (ret) {
767 goto end;
768 }
769
770 /* Write domain */
771 ret = mi_lttng_domain(writer, domain, 1);
772 if (ret) {
773 goto end;
774 }
775
776 /* Open events */
777 ret = mi_lttng_events_open(writer);
778 if (ret) {
779 goto end;
780 }
781
782 for (i = 0; i < count; i++) {
783 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
784 if (ret) {
785 goto end;
786 }
787 }
788
789 /* close events, domain and domains */
790 ret = mi_lttng_close_multi_element(writer, 3);
791 if (ret) {
792 goto end;
793 }
794
795 end:
796 return ret;
797 }
798
799 /*
800 * Ask for all trace events in the kernel
801 */
802 static int list_kernel_events(void)
803 {
804 int i, size, ret = CMD_SUCCESS;
805 struct lttng_domain domain;
806 struct lttng_handle *handle;
807 struct lttng_event *event_list;
808
809 memset(&domain, 0, sizeof(domain));
810
811 DBG("Getting kernel tracing events");
812
813 domain.type = LTTNG_DOMAIN_KERNEL;
814
815 handle = lttng_create_handle(NULL, &domain);
816 if (handle == NULL) {
817 ret = CMD_ERROR;
818 goto error;
819 }
820
821 size = lttng_list_tracepoints(handle, &event_list);
822 if (size < 0) {
823 ERR("Unable to list kernel events: %s", lttng_strerror(size));
824 lttng_destroy_handle(handle);
825 return CMD_ERROR;
826 }
827
828 if (lttng_opt_mi) {
829 /* Mi print */
830 ret = mi_list_kernel_events(event_list, size, &domain);
831 if (ret) {
832 ret = CMD_ERROR;
833 goto end;
834 }
835 } else {
836 MSG("Kernel events:\n-------------");
837
838 for (i = 0; i < size; i++) {
839 print_events(&event_list[i]);
840 }
841
842 MSG("");
843 }
844
845 end:
846 free(event_list);
847
848 lttng_destroy_handle(handle);
849 return ret;
850
851 error:
852 lttng_destroy_handle(handle);
853 return ret;
854 }
855
856 /*
857 * Machine interface
858 * Print a list of system calls.
859 */
860 static int mi_list_syscalls(struct lttng_event *events, int count)
861 {
862 int ret, i;
863
864 /* Open events */
865 ret = mi_lttng_events_open(writer);
866 if (ret) {
867 goto end;
868 }
869
870 for (i = 0; i < count; i++) {
871 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
872 if (ret) {
873 goto end;
874 }
875 }
876
877 /* Close events. */
878 ret = mi_lttng_writer_close_element(writer);
879 if (ret) {
880 goto end;
881 }
882
883 end:
884 return ret;
885 }
886
887 /*
888 * Ask for kernel system calls.
889 */
890 static int list_syscalls(void)
891 {
892 int i, size, ret = CMD_SUCCESS;
893 struct lttng_event *event_list;
894
895 DBG("Getting kernel system call events");
896
897 size = lttng_list_syscalls(&event_list);
898 if (size < 0) {
899 ERR("Unable to list system calls: %s", lttng_strerror(size));
900 ret = CMD_ERROR;
901 goto error;
902 }
903
904 if (lttng_opt_mi) {
905 /* Mi print */
906 ret = mi_list_syscalls(event_list, size);
907 if (ret) {
908 ret = CMD_ERROR;
909 goto end;
910 }
911 } else {
912 MSG("System calls:\n-------------");
913
914 for (i = 0; i < size; i++) {
915 print_events(&event_list[i]);
916 }
917
918 MSG("");
919 }
920
921 end:
922 free(event_list);
923 return ret;
924
925 error:
926 return ret;
927 }
928
929 /*
930 * Machine Interface
931 * Print a list of agent events
932 */
933 static int mi_list_session_agent_events(struct lttng_event *events, int count)
934 {
935 int ret, i;
936
937 /* Open events element */
938 ret = mi_lttng_events_open(writer);
939 if (ret) {
940 goto end;
941 }
942
943 for (i = 0; i < count; i++) {
944 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
945 if (ret) {
946 goto end;
947 }
948 }
949
950 /* Close events element */
951 ret = mi_lttng_writer_close_element(writer);
952
953 end:
954 return ret;
955 }
956
957 /*
958 * List agent events for a specific session using the handle.
959 *
960 * Return CMD_SUCCESS on success else a negative value.
961 */
962 static int list_session_agent_events(void)
963 {
964 int ret = CMD_SUCCESS, count, i;
965 struct lttng_event *events = NULL;
966
967 count = lttng_list_events(handle, "", &events);
968 if (count < 0) {
969 ret = CMD_ERROR;
970 ERR("%s", lttng_strerror(count));
971 goto error;
972 }
973
974 if (lttng_opt_mi) {
975 /* Mi print */
976 ret = mi_list_session_agent_events(events, count);
977 if (ret) {
978 ret = CMD_ERROR;
979 goto end;
980 }
981 } else {
982 /* Pretty print */
983 MSG("Events (Logger name):\n---------------------");
984 if (count == 0) {
985 MSG("%sNone\n", indent6);
986 goto end;
987 }
988
989 for (i = 0; i < count; i++) {
990 if (events[i].loglevel_type !=
991 LTTNG_EVENT_LOGLEVEL_ALL) {
992 MSG("%s- %s%s (loglevel%s %s)", indent4,
993 events[i].name,
994 enabled_string(
995 events[i].enabled),
996 logleveltype_string(
997 events[i].loglevel_type),
998 mi_lttng_loglevel_string(
999 events[i].loglevel,
1000 handle->domain.type));
1001 } else {
1002 MSG("%s- %s%s", indent4, events[i].name,
1003 enabled_string(events[i].enabled));
1004 }
1005 }
1006
1007 MSG("");
1008 }
1009
1010 end:
1011 free(events);
1012 error:
1013 return ret;
1014 }
1015
1016 /*
1017 * Machine interface
1018 * print a list of event
1019 */
1020 static int mi_list_events(struct lttng_event *events, int count)
1021 {
1022 int ret, i;
1023
1024 /* Open events element */
1025 ret = mi_lttng_events_open(writer);
1026 if (ret) {
1027 goto end;
1028 }
1029
1030 for (i = 0; i < count; i++) {
1031 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1032 if (ret) {
1033 goto end;
1034 }
1035 }
1036
1037 /* Close events element */
1038 ret = mi_lttng_writer_close_element(writer);
1039
1040 end:
1041 return ret;
1042 }
1043
1044 /*
1045 * List events of channel of session and domain.
1046 */
1047 static int list_events(const char *channel_name)
1048 {
1049 int ret = CMD_SUCCESS, count, i;
1050 struct lttng_event *events = NULL;
1051
1052 count = lttng_list_events(handle, channel_name, &events);
1053 if (count < 0) {
1054 ret = CMD_ERROR;
1055 ERR("%s", lttng_strerror(count));
1056 goto error;
1057 }
1058
1059 if (lttng_opt_mi) {
1060 /* Mi print */
1061 ret = mi_list_events(events, count);
1062 if (ret) {
1063 ret = CMD_ERROR;
1064 goto end;
1065 }
1066 } else {
1067 /* Pretty print */
1068 MSG("\n%sEvents:", indent4);
1069 if (count == 0) {
1070 MSG("%sNone\n", indent6);
1071 goto end;
1072 }
1073
1074 for (i = 0; i < count; i++) {
1075 print_events(&events[i]);
1076 }
1077
1078 MSG("");
1079 }
1080 end:
1081 free(events);
1082 error:
1083 return ret;
1084 }
1085
1086 /*
1087 * Pretty print channel
1088 */
1089 static void print_channel(struct lttng_channel *channel)
1090 {
1091 MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled));
1092
1093 MSG("%sAttributes:", indent4);
1094 MSG("%soverwrite mode: %d", indent6, channel->attr.overwrite);
1095 MSG("%ssubbufers size: %" PRIu64, indent6, channel->attr.subbuf_size);
1096 MSG("%snumber of subbufers: %" PRIu64, indent6, channel->attr.num_subbuf);
1097 MSG("%sswitch timer interval: %u", indent6, channel->attr.switch_timer_interval);
1098 MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval);
1099 MSG("%strace file count: %" PRIu64, indent6, channel->attr.tracefile_count);
1100 MSG("%strace file size (bytes): %" PRIu64, indent6, channel->attr.tracefile_size);
1101 switch (channel->attr.output) {
1102 case LTTNG_EVENT_SPLICE:
1103 MSG("%soutput: splice()", indent6);
1104 break;
1105 case LTTNG_EVENT_MMAP:
1106 MSG("%soutput: mmap()", indent6);
1107 break;
1108 }
1109 }
1110
1111 /*
1112 * Machine interface
1113 * Print a list of channel
1114 *
1115 */
1116 static int mi_list_channels(struct lttng_channel *channels, int count,
1117 const char *channel_name)
1118 {
1119 int i, ret;
1120 unsigned int chan_found = 0;
1121
1122 /* Open channels element */
1123 ret = mi_lttng_channels_open(writer);
1124 if (ret) {
1125 goto error;
1126 }
1127
1128 for (i = 0; i < count; i++) {
1129 if (channel_name != NULL) {
1130 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1131 chan_found = 1;
1132 } else {
1133 continue;
1134 }
1135 }
1136
1137 /* Write channel element and leave it open */
1138 ret = mi_lttng_channel(writer, &channels[i], 1);
1139 if (ret) {
1140 goto error;
1141 }
1142
1143 /* Listing events per channel */
1144 ret = list_events(channels[i].name);
1145 if (ret) {
1146 goto error;
1147 }
1148
1149 /* Closing the channel element we opened earlier */
1150 ret = mi_lttng_writer_close_element(writer);
1151 if (ret) {
1152 goto error;
1153 }
1154
1155 if (chan_found) {
1156 break;
1157 }
1158 }
1159
1160 /* Close channels element */
1161 ret = mi_lttng_writer_close_element(writer);
1162 if (ret) {
1163 goto error;
1164 }
1165
1166 error:
1167 return ret;
1168 }
1169
1170 /*
1171 * List channel(s) of session and domain.
1172 *
1173 * If channel_name is NULL, all channels are listed.
1174 */
1175 static int list_channels(const char *channel_name)
1176 {
1177 int count, i, ret = CMD_SUCCESS;
1178 unsigned int chan_found = 0;
1179 struct lttng_channel *channels = NULL;
1180
1181 DBG("Listing channel(s) (%s)", channel_name ? : "<all>");
1182
1183 count = lttng_list_channels(handle, &channels);
1184 if (count < 0) {
1185 switch (-count) {
1186 case LTTNG_ERR_KERN_CHAN_NOT_FOUND:
1187 if (lttng_opt_mi) {
1188 /* When printing mi this is not an error
1189 * but an empty channels element */
1190 count = 0;
1191 } else {
1192 ret = CMD_SUCCESS;
1193 WARN("No kernel channel");
1194 goto error_channels;
1195 }
1196 break;
1197 default:
1198 /* We had a real error */
1199 ret = CMD_ERROR;
1200 ERR("%s", lttng_strerror(count));
1201 goto error_channels;
1202 break;
1203 }
1204 }
1205
1206 if (lttng_opt_mi) {
1207 /* Mi print */
1208 ret = mi_list_channels(channels, count, channel_name);
1209 if (ret) {
1210 ret = CMD_ERROR;
1211 goto error;
1212 }
1213 } else {
1214 /* Pretty print */
1215 if (count) {
1216 MSG("Channels:\n-------------");
1217 }
1218
1219 for (i = 0; i < count; i++) {
1220 if (channel_name != NULL) {
1221 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1222 chan_found = 1;
1223 } else {
1224 continue;
1225 }
1226 }
1227 print_channel(&channels[i]);
1228
1229 /* Listing events per channel */
1230 ret = list_events(channels[i].name);
1231 if (ret) {
1232 goto error;
1233 }
1234
1235 if (chan_found) {
1236 break;
1237 }
1238 }
1239
1240 if (!chan_found && channel_name != NULL) {
1241 ret = CMD_ERROR;
1242 ERR("Channel %s not found", channel_name);
1243 goto error;
1244 }
1245 }
1246 error:
1247 free(channels);
1248
1249 error_channels:
1250 return ret;
1251 }
1252
1253 /*
1254 * List tracker PID(s) of session and domain.
1255 */
1256 static int list_tracker_pids(void)
1257 {
1258 int ret = 0;
1259 int enabled;
1260 int *pids = NULL;
1261 size_t nr_pids;
1262
1263 ret = lttng_list_tracker_pids(handle,
1264 &enabled, &pids, &nr_pids);
1265 if (ret) {
1266 return ret;
1267 }
1268 if (enabled) {
1269 int i;
1270 _MSG("PID tracker: [");
1271
1272 /* Mi tracker_pid element*/
1273 if (writer) {
1274 /* Open tracker_pid and targets elements */
1275 ret = mi_lttng_pid_tracker_open(writer);
1276 if (ret) {
1277 goto end;
1278 }
1279 }
1280
1281 for (i = 0; i < nr_pids; i++) {
1282 if (i) {
1283 _MSG(",");
1284 }
1285 _MSG(" %d", pids[i]);
1286
1287 /* Mi */
1288 if (writer) {
1289 ret = mi_lttng_pid_target(writer, pids[i], 0);
1290 if (ret) {
1291 goto end;
1292 }
1293 }
1294 }
1295 _MSG(" ]\n\n");
1296
1297 /* Mi close tracker_pid and targets */
1298 if (writer) {
1299 ret = mi_lttng_close_multi_element(writer,2);
1300 if (ret) {
1301 goto end;
1302 }
1303 }
1304 }
1305 end:
1306 free(pids);
1307 return ret;
1308
1309 }
1310
1311 /*
1312 * List all tracker of a domain
1313 */
1314 static int list_trackers(void)
1315 {
1316 int ret;
1317
1318 /* Trackers listing */
1319 if (lttng_opt_mi) {
1320 ret = mi_lttng_trackers_open(writer);
1321 if (ret) {
1322 goto end;
1323 }
1324 }
1325
1326 /* pid tracker */
1327 ret = list_tracker_pids();
1328 if (ret) {
1329 goto end;
1330 }
1331
1332 if (lttng_opt_mi) {
1333 /* Close trackers element */
1334 ret = mi_lttng_writer_close_element(writer);
1335 if (ret) {
1336 goto end;
1337 }
1338 }
1339
1340 end:
1341 return ret;
1342 }
1343
1344 /*
1345 * Machine interface
1346 * Find the session with session_name as name
1347 * and print his informations.
1348 */
1349 static int mi_list_session(const char *session_name,
1350 struct lttng_session *sessions, int count)
1351 {
1352 int ret, i;
1353 unsigned int session_found = 0;
1354
1355 if (session_name == NULL) {
1356 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1357 goto end;
1358 }
1359
1360 for (i = 0; i < count; i++) {
1361 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1362 /* We need to leave it open to append other informations
1363 * like domain, channel, events etc.*/
1364 session_found = 1;
1365 ret = mi_lttng_session(writer, &sessions[i], 1);
1366 if (ret) {
1367 goto end;
1368 }
1369 break;
1370 }
1371 }
1372
1373 if (!session_found) {
1374 ERR("Session '%s' not found", session_name);
1375 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1376 goto end;
1377 }
1378
1379 end:
1380 return ret;
1381 }
1382
1383 /*
1384 * Machine interface
1385 * List all availables session
1386 */
1387 static int mi_list_sessions(struct lttng_session *sessions, int count)
1388 {
1389 int ret, i;
1390
1391 /* Opening sessions element */
1392 ret = mi_lttng_sessions_open(writer);
1393 if (ret) {
1394 goto end;
1395 }
1396
1397 /* Listing sessions */
1398 for (i = 0; i < count; i++) {
1399 ret = mi_lttng_session(writer, &sessions[i], 0);
1400 if (ret) {
1401 goto end;
1402 }
1403 }
1404
1405 /* Closing sessions element */
1406 ret = mi_lttng_writer_close_element(writer);
1407 if (ret) {
1408 goto end;
1409 }
1410
1411 end:
1412 return ret;
1413 }
1414
1415 /*
1416 * List available tracing session. List only basic information.
1417 *
1418 * If session_name is NULL, all sessions are listed.
1419 */
1420 static int list_sessions(const char *session_name)
1421 {
1422 int ret = CMD_SUCCESS;
1423 int count, i;
1424 unsigned int session_found = 0;
1425 struct lttng_session *sessions;
1426
1427 count = lttng_list_sessions(&sessions);
1428 DBG("Session count %d", count);
1429 if (count < 0) {
1430 ret = CMD_ERROR;
1431 ERR("%s", lttng_strerror(count));
1432 goto end;
1433 }
1434
1435 if (lttng_opt_mi) {
1436 /* Mi */
1437 if (session_name == NULL) {
1438 /* List all session */
1439 ret = mi_list_sessions(sessions, count);
1440 } else {
1441 /* Note : this return an open session element */
1442 ret = mi_list_session(session_name, sessions, count);
1443 }
1444 if (ret) {
1445 ret = CMD_ERROR;
1446 goto error;
1447 }
1448 } else {
1449 /* Pretty print */
1450 if (count == 0) {
1451 MSG("Currently no available tracing session");
1452 goto end;
1453 }
1454
1455 if (session_name == NULL) {
1456 MSG("Available tracing sessions:");
1457 }
1458
1459
1460 for (i = 0; i < count; i++) {
1461 if (session_name != NULL) {
1462 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1463 session_found = 1;
1464 MSG("Tracing session %s: [%s%s]", session_name,
1465 active_string(sessions[i].enabled),
1466 snapshot_string(sessions[i].snapshot_mode));
1467 MSG("%sTrace path: %s\n", indent4, sessions[i].path);
1468 break;
1469 }
1470 } else {
1471 MSG(" %d) %s (%s) [%s%s]", i + 1,
1472 sessions[i].name, sessions[i].path,
1473 active_string(sessions[i].enabled),
1474 snapshot_string(sessions[i].snapshot_mode));
1475 MSG("%sTrace path: %s", indent4, sessions[i].path);
1476 if (sessions[i].live_timer_interval != 0) {
1477 MSG("%sLive timer interval (usec): %u", indent4,
1478 sessions[i].live_timer_interval);
1479 }
1480 MSG("");
1481 }
1482 }
1483
1484 if (!session_found && session_name != NULL) {
1485 ERR("Session '%s' not found", session_name);
1486 ret = CMD_ERROR;
1487 goto error;
1488 }
1489
1490 if (session_name == NULL) {
1491 MSG("\nUse lttng list <session_name> for more details");
1492 }
1493 }
1494
1495 error:
1496 free(sessions);
1497 end:
1498 return ret;
1499 }
1500
1501
1502 /*
1503 * Machine Interface
1504 * list available domain(s) for a session.
1505 */
1506 static int mi_list_domains(struct lttng_domain *domains, int count)
1507 {
1508 int i, ret;
1509 /* Open domains element */
1510 ret = mi_lttng_domains_open(writer);
1511 if (ret) {
1512 goto end;
1513 }
1514
1515 for (i = 0; i < count; i++) {
1516 ret = mi_lttng_domain(writer, &domains[i] , 0);
1517 if (ret) {
1518 goto end;
1519 }
1520 }
1521
1522 /* Closing domains element */
1523 ret = mi_lttng_writer_close_element(writer);
1524 if (ret) {
1525 goto end;
1526 }
1527 end:
1528 return ret;
1529 }
1530
1531 /*
1532 * List available domain(s) for a session.
1533 */
1534 static int list_domains(const char *session_name)
1535 {
1536 int i, count, ret = CMD_SUCCESS;
1537 struct lttng_domain *domains = NULL;
1538
1539
1540 count = lttng_list_domains(session_name, &domains);
1541 if (count < 0) {
1542 ret = CMD_ERROR;
1543 ERR("%s", lttng_strerror(count));
1544 goto end;
1545 }
1546
1547 if (lttng_opt_mi) {
1548 /* Mi output */
1549 ret = mi_list_domains(domains, count);
1550 if (ret) {
1551 ret = CMD_ERROR;
1552 goto error;
1553 }
1554 } else {
1555 /* Pretty print */
1556 MSG("Domains:\n-------------");
1557 if (count == 0) {
1558 MSG(" None");
1559 goto end;
1560 }
1561
1562 for (i = 0; i < count; i++) {
1563 switch (domains[i].type) {
1564 case LTTNG_DOMAIN_KERNEL:
1565 MSG(" - Kernel");
1566 break;
1567 case LTTNG_DOMAIN_UST:
1568 MSG(" - UST global");
1569 break;
1570 case LTTNG_DOMAIN_JUL:
1571 MSG(" - JUL (Java Util Logging)");
1572 break;
1573 case LTTNG_DOMAIN_LOG4J:
1574 MSG(" - LOG4j (Logging for Java)");
1575 break;
1576 case LTTNG_DOMAIN_PYTHON:
1577 MSG(" - Python (logging)");
1578 break;
1579 default:
1580 break;
1581 }
1582 }
1583 }
1584
1585 error:
1586 free(domains);
1587
1588 end:
1589 return ret;
1590 }
1591
1592 /*
1593 * The 'list <options>' first level command
1594 */
1595 int cmd_list(int argc, const char **argv)
1596 {
1597 int opt, ret = CMD_SUCCESS;
1598 const char *session_name;
1599 static poptContext pc;
1600 struct lttng_domain domain;
1601 struct lttng_domain *domains = NULL;
1602
1603 memset(&domain, 0, sizeof(domain));
1604
1605 if (argc < 1) {
1606 usage(stderr);
1607 ret = CMD_ERROR;
1608 goto end;
1609 }
1610
1611 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1612 poptReadDefaultConfig(pc, 0);
1613
1614 while ((opt = poptGetNextOpt(pc)) != -1) {
1615 switch (opt) {
1616 case OPT_HELP:
1617 usage(stdout);
1618 goto end;
1619 case OPT_USERSPACE:
1620 opt_userspace = 1;
1621 break;
1622 case OPT_LIST_OPTIONS:
1623 list_cmd_options(stdout, long_options);
1624 goto end;
1625 default:
1626 usage(stderr);
1627 ret = CMD_UNDEFINED;
1628 goto end;
1629 }
1630 }
1631
1632 /* Mi check */
1633 if (lttng_opt_mi) {
1634 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1635 if (!writer) {
1636 ret = CMD_ERROR;
1637 goto end;
1638 }
1639
1640 /* Open command element */
1641 ret = mi_lttng_writer_command_open(writer,
1642 mi_lttng_element_command_list);
1643 if (ret) {
1644 ret = CMD_ERROR;
1645 goto end;
1646 }
1647
1648 /* Open output element */
1649 ret = mi_lttng_writer_open_element(writer,
1650 mi_lttng_element_command_output);
1651 if (ret) {
1652 ret = CMD_ERROR;
1653 goto end;
1654 }
1655 }
1656
1657 /* Get session name (trailing argument) */
1658 session_name = poptGetArg(pc);
1659 DBG2("Session name: %s", session_name);
1660
1661 if (opt_kernel) {
1662 domain.type = LTTNG_DOMAIN_KERNEL;
1663 } else if (opt_userspace) {
1664 DBG2("Listing userspace global domain");
1665 domain.type = LTTNG_DOMAIN_UST;
1666 } else if (opt_jul) {
1667 DBG2("Listing JUL domain");
1668 domain.type = LTTNG_DOMAIN_JUL;
1669 } else if (opt_log4j) {
1670 domain.type = LTTNG_DOMAIN_LOG4J;
1671 } else if (opt_python) {
1672 domain.type = LTTNG_DOMAIN_PYTHON;
1673 }
1674
1675 if (!opt_kernel && opt_syscall) {
1676 WARN("--syscall will only work with the Kernel domain (-k)");
1677 ret = CMD_ERROR;
1678 goto end;
1679 }
1680
1681 if (opt_kernel || opt_userspace || opt_jul || opt_log4j || opt_python) {
1682 handle = lttng_create_handle(session_name, &domain);
1683 if (handle == NULL) {
1684 ret = CMD_FATAL;
1685 goto end;
1686 }
1687 }
1688
1689 if (session_name == NULL) {
1690 if (!opt_kernel && !opt_userspace && !opt_jul && !opt_log4j
1691 && !opt_python) {
1692 ret = list_sessions(NULL);
1693 if (ret) {
1694 goto end;
1695 }
1696 }
1697 if (opt_kernel) {
1698 if (opt_syscall) {
1699 ret = list_syscalls();
1700 if (ret) {
1701 goto end;
1702 }
1703 } else {
1704 ret = list_kernel_events();
1705 if (ret) {
1706 goto end;
1707 }
1708 }
1709 }
1710 if (opt_userspace) {
1711 if (opt_fields) {
1712 ret = list_ust_event_fields();
1713 } else {
1714 ret = list_ust_events();
1715 }
1716 if (ret) {
1717 goto end;
1718 }
1719 }
1720 if (opt_jul || opt_log4j || opt_python) {
1721 ret = list_agent_events();
1722 if (ret) {
1723 goto end;
1724 }
1725 }
1726 } else {
1727 /* List session attributes */
1728 if (lttng_opt_mi) {
1729 /* Open element sessions
1730 * Present for xml consistency */
1731 ret = mi_lttng_sessions_open(writer);
1732 if (ret) {
1733 goto end;
1734 }
1735 }
1736 /* MI: the ouptut of list_sessions is an unclosed session element */
1737 ret = list_sessions(session_name);
1738 if (ret) {
1739 goto end;
1740 }
1741
1742 /* Domain listing */
1743 if (opt_domain) {
1744 ret = list_domains(session_name);
1745 goto end;
1746 }
1747
1748 /* Channel listing */
1749 if (opt_kernel || opt_userspace) {
1750 if (lttng_opt_mi) {
1751 /* Add of domains and domain element for xml
1752 * consistency and validation
1753 */
1754 ret = mi_lttng_domains_open(writer);
1755 if (ret) {
1756 goto end;
1757 }
1758
1759 /* Open domain and leave it open for
1760 * nested channels printing */
1761 ret = mi_lttng_domain(writer, &domain, 1);
1762 if (ret) {
1763 goto end;
1764 }
1765
1766 }
1767
1768
1769 /* Trackers */
1770 ret = list_trackers();
1771 if (ret) {
1772 goto end;
1773 }
1774
1775 /* Channels */
1776 ret = list_channels(opt_channel);
1777 if (ret) {
1778 goto end;
1779 }
1780
1781 if (lttng_opt_mi) {
1782 /* Close domain and domain element */
1783 ret = mi_lttng_close_multi_element(writer, 2);
1784 }
1785 if (ret) {
1786 goto end;
1787 }
1788
1789
1790 } else {
1791 int i, nb_domain;
1792
1793 /* We want all domain(s) */
1794 nb_domain = lttng_list_domains(session_name, &domains);
1795 if (nb_domain < 0) {
1796 ret = CMD_ERROR;
1797 ERR("%s", lttng_strerror(nb_domain));
1798 goto end;
1799 }
1800
1801 if (lttng_opt_mi) {
1802 ret = mi_lttng_domains_open(writer);
1803 if (ret) {
1804 ret = CMD_ERROR;
1805 goto end;
1806 }
1807 }
1808
1809 for (i = 0; i < nb_domain; i++) {
1810 switch (domains[i].type) {
1811 case LTTNG_DOMAIN_KERNEL:
1812 MSG("=== Domain: Kernel ===\n");
1813 break;
1814 case LTTNG_DOMAIN_UST:
1815 MSG("=== Domain: UST global ===\n");
1816 MSG("Buffer type: %s\n",
1817 domains[i].buf_type ==
1818 LTTNG_BUFFER_PER_PID ? "per PID" : "per UID");
1819 break;
1820 case LTTNG_DOMAIN_JUL:
1821 MSG("=== Domain: JUL (Java Util Logging) ===\n");
1822 break;
1823 case LTTNG_DOMAIN_LOG4J:
1824 MSG("=== Domain: LOG4j (Logging for Java) ===\n");
1825 break;
1826 case LTTNG_DOMAIN_PYTHON:
1827 MSG("=== Domain: Python (logging) ===\n");
1828 break;
1829 default:
1830 MSG("=== Domain: Unimplemented ===\n");
1831 break;
1832 }
1833
1834 if (lttng_opt_mi) {
1835 ret = mi_lttng_domain(writer, &domains[i], 1);
1836 if (ret) {
1837 ret = CMD_ERROR;
1838 goto end;
1839 }
1840 }
1841
1842 /* Clean handle before creating a new one */
1843 if (handle) {
1844 lttng_destroy_handle(handle);
1845 }
1846
1847 handle = lttng_create_handle(session_name, &domains[i]);
1848 if (handle == NULL) {
1849 ret = CMD_FATAL;
1850 goto end;
1851 }
1852
1853 if (domains[i].type == LTTNG_DOMAIN_JUL ||
1854 domains[i].type == LTTNG_DOMAIN_LOG4J ||
1855 domains[i].type == LTTNG_DOMAIN_PYTHON) {
1856 ret = list_session_agent_events();
1857 if (ret) {
1858 goto end;
1859 }
1860
1861 goto next_domain;
1862 }
1863
1864 switch (domains[i].type) {
1865 case LTTNG_DOMAIN_KERNEL:
1866 case LTTNG_DOMAIN_UST:
1867 ret = list_trackers();
1868 if (ret) {
1869 goto end;
1870 }
1871 break;
1872 default:
1873 break;
1874 }
1875
1876 ret = list_channels(opt_channel);
1877 if (ret) {
1878 goto end;
1879 }
1880
1881 next_domain:
1882 if (lttng_opt_mi) {
1883 /* Close domain element */
1884 ret = mi_lttng_writer_close_element(writer);
1885 if (ret) {
1886 ret = CMD_ERROR;
1887 goto end;
1888 }
1889 }
1890
1891 }
1892 if (lttng_opt_mi) {
1893 /* Close the domains, session and sessions element */
1894 ret = mi_lttng_close_multi_element(writer, 3);
1895 if (ret) {
1896 ret = CMD_ERROR;
1897 goto end;
1898 }
1899 }
1900 }
1901 }
1902
1903 /* Mi closing */
1904 if (lttng_opt_mi) {
1905 /* Close output element */
1906 ret = mi_lttng_writer_close_element(writer);
1907 if (ret) {
1908 ret = CMD_ERROR;
1909 goto end;
1910 }
1911
1912 /* Command element close */
1913 ret = mi_lttng_writer_command_close(writer);
1914 if (ret) {
1915 ret = CMD_ERROR;
1916 goto end;
1917 }
1918 }
1919 end:
1920 /* Mi clean-up */
1921 if (writer && mi_lttng_writer_destroy(writer)) {
1922 /* Preserve original error code */
1923 ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
1924 }
1925
1926 free(domains);
1927 if (handle) {
1928 lttng_destroy_handle(handle);
1929 }
1930
1931 poptFreeContext(pc);
1932 return ret;
1933 }
LTTng 2.0 tools and control repository
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