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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 processes element */
344 ret = mi_lttng_processes_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_process(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 processes */
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;
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 /* Open domains element */
569 ret = mi_lttng_domains_open(writer);
570 if (ret) {
571 goto end;
572 }
573
574 /* Write domain */
575 ret = mi_lttng_domain(writer, domain, 1);
576 if (ret) {
577 goto end;
578 }
579
580 /* Open processes element */
581 ret = mi_lttng_processes_open(writer);
582 if (ret) {
583 goto end;
584 }
585
586 for (i = 0; i < count; i++) {
587 if (cur_pid != fields[i].event.pid) {
588 if (pid_element_open) {
589 if (event_element_open) {
590
591 /* Close the previous field element and event. */
592 ret = mi_lttng_close_multi_element(writer, 2);
593 if (ret) {
594 goto end;
595 }
596 event_element_open = 0;
597 }
598 /* Close the previous events, pid element */
599 ret = mi_lttng_close_multi_element(writer, 2);
600 if (ret) {
601 goto end;
602 }
603 pid_element_open = 0;
604 }
605
606 cur_pid = fields[i].event.pid;
607 cmdline = get_cmdline_by_pid(cur_pid);
608 if (!pid_element_open) {
609 /* Open and write a process element */
610 ret = mi_lttng_process(writer, cur_pid, cmdline, 1);
611 if (ret) {
612 goto error;
613 }
614
615 /* Open events element */
616 ret = mi_lttng_events_open(writer);
617 if (ret) {
618 goto error;
619 }
620 pid_element_open = 1;
621 }
622 free(cmdline);
623 /* Wipe current event since we are about to print a new PID. */
624 memset(&cur_event, 0, sizeof(cur_event));
625 }
626
627 if (strcmp(cur_event.name, fields[i].event.name) != 0) {
628 if (event_element_open) {
629 /* Close the previous fields element and the previous event */
630 ret = mi_lttng_close_multi_element(writer, 2);
631 if (ret) {
632 goto end;
633 }
634 event_element_open = 0;
635 }
636
637 memcpy(&cur_event, &fields[i].event,
638 sizeof(cur_event));
639
640 if (!event_element_open) {
641 /* Open and write the event */
642 ret = mi_lttng_event(writer, &cur_event, 1,
643 handle->domain.type);
644 if (ret) {
645 goto end;
646 }
647
648 /* Open a fields element */
649 ret = mi_lttng_event_fields_open(writer);
650 if (ret) {
651 goto end;
652 }
653 event_element_open = 1;
654 }
655 }
656
657 /* Print the event_field */
658 ret = mi_lttng_event_field(writer, &fields[i]);
659 if (ret) {
660 goto end;
661 }
662 }
663
664 /* Close processes, domain, domains */
665 ret = mi_lttng_close_multi_element(writer, 3);
666 end:
667 return ret;
668 error:
669 free(cmdline);
670 return ret;
671 }
672
673 /*
674 * Ask session daemon for all user space tracepoint fields available.
675 */
676 static int list_ust_event_fields(void)
677 {
678 int i, size, ret = CMD_SUCCESS;
679 struct lttng_domain domain;
680 struct lttng_handle *handle;
681 struct lttng_event_field *event_field_list;
682 pid_t cur_pid = 0;
683 char *cmdline = NULL;
684
685 struct lttng_event cur_event;
686
687 memset(&domain, 0, sizeof(domain));
688 memset(&cur_event, 0, sizeof(cur_event));
689
690 DBG("Getting UST tracing event fields");
691
692 domain.type = LTTNG_DOMAIN_UST;
693
694 handle = lttng_create_handle(NULL, &domain);
695 if (handle == NULL) {
696 ret = CMD_ERROR;
697 goto end;
698 }
699
700 size = lttng_list_tracepoint_fields(handle, &event_field_list);
701 if (size < 0) {
702 ERR("Unable to list UST event fields: %s", lttng_strerror(size));
703 ret = CMD_ERROR;
704 goto end;
705 }
706
707 if (lttng_opt_mi) {
708 /* Mi print */
709 ret = mi_list_ust_event_fields(event_field_list, size, &domain);
710 if (ret) {
711 ret = CMD_ERROR;
712 goto error;
713 }
714 } else {
715 /* Pretty print */
716 MSG("UST events:\n-------------");
717
718 if (size == 0) {
719 MSG("None");
720 }
721
722 for (i = 0; i < size; i++) {
723 if (cur_pid != event_field_list[i].event.pid) {
724 cur_pid = event_field_list[i].event.pid;
725 cmdline = get_cmdline_by_pid(cur_pid);
726 if (cmdline == NULL) {
727 ret = CMD_ERROR;
728 goto error;
729 }
730 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
731 free(cmdline);
732 /* Wipe current event since we are about to print a new PID. */
733 memset(&cur_event, 0, sizeof(cur_event));
734 }
735 if (strcmp(cur_event.name, event_field_list[i].event.name) != 0) {
736 print_events(&event_field_list[i].event);
737 memcpy(&cur_event, &event_field_list[i].event,
738 sizeof(cur_event));
739 }
740 print_event_field(&event_field_list[i]);
741 }
742
743 MSG("");
744 }
745
746 error:
747 free(event_field_list);
748 end:
749 lttng_destroy_handle(handle);
750 return ret;
751 }
752
753 /*
754 * Machine interface
755 * Print a list of kernel events
756 */
757 static int mi_list_kernel_events(struct lttng_event *events, int count,
758 struct lttng_domain *domain)
759 {
760 int ret, i;
761
762 /* Open domains element */
763 ret = mi_lttng_domains_open(writer);
764 if (ret) {
765 goto end;
766 }
767
768 /* Write domain */
769 ret = mi_lttng_domain(writer, domain, 1);
770 if (ret) {
771 goto end;
772 }
773
774 /* Open events */
775 ret = mi_lttng_events_open(writer);
776 if (ret) {
777 goto end;
778 }
779
780 for (i = 0; i < count; i++) {
781 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
782 if (ret) {
783 goto end;
784 }
785 }
786
787 /* close events, domain and domains */
788 ret = mi_lttng_close_multi_element(writer, 3);
789 if (ret) {
790 goto end;
791 }
792
793 end:
794 return ret;
795 }
796
797 /*
798 * Ask for all trace events in the kernel
799 */
800 static int list_kernel_events(void)
801 {
802 int i, size, ret = CMD_SUCCESS;
803 struct lttng_domain domain;
804 struct lttng_handle *handle;
805 struct lttng_event *event_list;
806
807 memset(&domain, 0, sizeof(domain));
808
809 DBG("Getting kernel tracing events");
810
811 domain.type = LTTNG_DOMAIN_KERNEL;
812
813 handle = lttng_create_handle(NULL, &domain);
814 if (handle == NULL) {
815 ret = CMD_ERROR;
816 goto error;
817 }
818
819 size = lttng_list_tracepoints(handle, &event_list);
820 if (size < 0) {
821 ERR("Unable to list kernel events: %s", lttng_strerror(size));
822 lttng_destroy_handle(handle);
823 return CMD_ERROR;
824 }
825
826 if (lttng_opt_mi) {
827 /* Mi print */
828 ret = mi_list_kernel_events(event_list, size, &domain);
829 if (ret) {
830 ret = CMD_ERROR;
831 goto end;
832 }
833 } else {
834 MSG("Kernel events:\n-------------");
835
836 for (i = 0; i < size; i++) {
837 print_events(&event_list[i]);
838 }
839
840 MSG("");
841 }
842
843 end:
844 free(event_list);
845
846 lttng_destroy_handle(handle);
847 return ret;
848
849 error:
850 lttng_destroy_handle(handle);
851 return ret;
852 }
853
854 /*
855 * Machine interface
856 * Print a list of system calls.
857 */
858 static int mi_list_syscalls(struct lttng_event *events, int count)
859 {
860 int ret, i;
861
862 /* Open events */
863 ret = mi_lttng_events_open(writer);
864 if (ret) {
865 goto end;
866 }
867
868 for (i = 0; i < count; i++) {
869 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
870 if (ret) {
871 goto end;
872 }
873 }
874
875 /* Close events. */
876 ret = mi_lttng_writer_close_element(writer);
877 if (ret) {
878 goto end;
879 }
880
881 end:
882 return ret;
883 }
884
885 /*
886 * Ask for kernel system calls.
887 */
888 static int list_syscalls(void)
889 {
890 int i, size, ret = CMD_SUCCESS;
891 struct lttng_event *event_list;
892
893 DBG("Getting kernel system call events");
894
895 size = lttng_list_syscalls(&event_list);
896 if (size < 0) {
897 ERR("Unable to list system calls: %s", lttng_strerror(size));
898 ret = CMD_ERROR;
899 goto error;
900 }
901
902 if (lttng_opt_mi) {
903 /* Mi print */
904 ret = mi_list_syscalls(event_list, size);
905 if (ret) {
906 ret = CMD_ERROR;
907 goto end;
908 }
909 } else {
910 MSG("System calls:\n-------------");
911
912 for (i = 0; i < size; i++) {
913 print_events(&event_list[i]);
914 }
915
916 MSG("");
917 }
918
919 end:
920 free(event_list);
921 return ret;
922
923 error:
924 return ret;
925 }
926
927 /*
928 * Machine Interface
929 * Print a list of agent events
930 */
931 static int mi_list_session_agent_events(struct lttng_event *events, int count)
932 {
933 int ret, i;
934
935 /* Open events element */
936 ret = mi_lttng_events_open(writer);
937 if (ret) {
938 goto end;
939 }
940
941 for (i = 0; i < count; i++) {
942 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
943 if (ret) {
944 goto end;
945 }
946 }
947
948 /* Close events element */
949 ret = mi_lttng_writer_close_element(writer);
950
951 end:
952 return ret;
953 }
954
955 /*
956 * List agent events for a specific session using the handle.
957 *
958 * Return CMD_SUCCESS on success else a negative value.
959 */
960 static int list_session_agent_events(void)
961 {
962 int ret = CMD_SUCCESS, count, i;
963 struct lttng_event *events = NULL;
964
965 count = lttng_list_events(handle, "", &events);
966 if (count < 0) {
967 ret = CMD_ERROR;
968 ERR("%s", lttng_strerror(count));
969 goto error;
970 }
971
972 if (lttng_opt_mi) {
973 /* Mi print */
974 ret = mi_list_session_agent_events(events, count);
975 if (ret) {
976 ret = CMD_ERROR;
977 goto end;
978 }
979 } else {
980 /* Pretty print */
981 MSG("Events (Logger name):\n---------------------");
982 if (count == 0) {
983 MSG("%sNone\n", indent6);
984 goto end;
985 }
986
987 for (i = 0; i < count; i++) {
988 MSG("%s- %s%s (loglevel%s %s)", indent4, events[i].name,
989 enabled_string(events[i].enabled),
990 logleveltype_string(events[i].loglevel_type),
991 mi_lttng_loglevel_string(events[i].loglevel,
992 handle->domain.type));
993 }
994
995 MSG("");
996 }
997
998 end:
999 free(events);
1000 error:
1001 return ret;
1002 }
1003
1004 /*
1005 * Machine interface
1006 * print a list of event
1007 */
1008 static int mi_list_events(struct lttng_event *events, int count)
1009 {
1010 int ret, i;
1011
1012 /* Open events element */
1013 ret = mi_lttng_events_open(writer);
1014 if (ret) {
1015 goto end;
1016 }
1017
1018 for (i = 0; i < count; i++) {
1019 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1020 if (ret) {
1021 goto end;
1022 }
1023 }
1024
1025 /* Close events element */
1026 ret = mi_lttng_writer_close_element(writer);
1027
1028 end:
1029 return ret;
1030 }
1031
1032 /*
1033 * List events of channel of session and domain.
1034 */
1035 static int list_events(const char *channel_name)
1036 {
1037 int ret = CMD_SUCCESS, count, i;
1038 struct lttng_event *events = NULL;
1039
1040 count = lttng_list_events(handle, channel_name, &events);
1041 if (count < 0) {
1042 ret = CMD_ERROR;
1043 ERR("%s", lttng_strerror(count));
1044 goto error;
1045 }
1046
1047 if (lttng_opt_mi) {
1048 /* Mi print */
1049 ret = mi_list_events(events, count);
1050 if (ret) {
1051 ret = CMD_ERROR;
1052 goto end;
1053 }
1054 } else {
1055 /* Pretty print */
1056 MSG("\n%sEvents:", indent4);
1057 if (count == 0) {
1058 MSG("%sNone\n", indent6);
1059 goto end;
1060 }
1061
1062 for (i = 0; i < count; i++) {
1063 print_events(&events[i]);
1064 }
1065
1066 MSG("");
1067 }
1068 end:
1069 free(events);
1070 error:
1071 return ret;
1072 }
1073
1074 /*
1075 * Pretty print channel
1076 */
1077 static void print_channel(struct lttng_channel *channel)
1078 {
1079 MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled));
1080
1081 MSG("%sAttributes:", indent4);
1082 MSG("%soverwrite mode: %d", indent6, channel->attr.overwrite);
1083 MSG("%ssubbufers size: %" PRIu64, indent6, channel->attr.subbuf_size);
1084 MSG("%snumber of subbufers: %" PRIu64, indent6, channel->attr.num_subbuf);
1085 MSG("%sswitch timer interval: %u", indent6, channel->attr.switch_timer_interval);
1086 MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval);
1087 MSG("%strace file count: %" PRIu64, indent6, channel->attr.tracefile_count);
1088 MSG("%strace file size (bytes): %" PRIu64, indent6, channel->attr.tracefile_size);
1089 switch (channel->attr.output) {
1090 case LTTNG_EVENT_SPLICE:
1091 MSG("%soutput: splice()", indent6);
1092 break;
1093 case LTTNG_EVENT_MMAP:
1094 MSG("%soutput: mmap()", indent6);
1095 break;
1096 }
1097 }
1098
1099 /*
1100 * Machine interface
1101 * Print a list of channel
1102 *
1103 */
1104 static int mi_list_channels(struct lttng_channel *channels, int count,
1105 const char *channel_name)
1106 {
1107 int i, ret;
1108 unsigned int chan_found = 0;
1109
1110 /* Open channels element */
1111 ret = mi_lttng_channels_open(writer);
1112 if (ret) {
1113 goto error;
1114 }
1115
1116 for (i = 0; i < count; i++) {
1117 if (channel_name != NULL) {
1118 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1119 chan_found = 1;
1120 } else {
1121 continue;
1122 }
1123 }
1124
1125 /* Write channel element and leave it open */
1126 ret = mi_lttng_channel(writer, &channels[i], 1);
1127 if (ret) {
1128 goto error;
1129 }
1130
1131 /* Listing events per channel */
1132 ret = list_events(channels[i].name);
1133 if (ret) {
1134 goto error;
1135 }
1136
1137 /* Closing the channel element we opened earlier */
1138 ret = mi_lttng_writer_close_element(writer);
1139 if (ret) {
1140 goto error;
1141 }
1142
1143 if (chan_found) {
1144 break;
1145 }
1146 }
1147
1148 /* Close channels element */
1149 ret = mi_lttng_writer_close_element(writer);
1150 if (ret) {
1151 goto error;
1152 }
1153
1154 error:
1155 return ret;
1156 }
1157
1158 /*
1159 * List channel(s) of session and domain.
1160 *
1161 * If channel_name is NULL, all channels are listed.
1162 */
1163 static int list_channels(const char *channel_name)
1164 {
1165 int count, i, ret = CMD_SUCCESS;
1166 unsigned int chan_found = 0;
1167 struct lttng_channel *channels = NULL;
1168
1169 DBG("Listing channel(s) (%s)", channel_name ? : "<all>");
1170
1171 count = lttng_list_channels(handle, &channels);
1172 if (count < 0) {
1173 switch (-count) {
1174 case LTTNG_ERR_KERN_CHAN_NOT_FOUND:
1175 if (lttng_opt_mi) {
1176 /* When printing mi this is not an error
1177 * but an empty channels element */
1178 count = 0;
1179 } else {
1180 ret = CMD_SUCCESS;
1181 WARN("No kernel channel");
1182 goto error_channels;
1183 }
1184 break;
1185 default:
1186 /* We had a real error */
1187 ret = CMD_ERROR;
1188 ERR("%s", lttng_strerror(count));
1189 goto error_channels;
1190 break;
1191 }
1192 }
1193
1194 if (lttng_opt_mi) {
1195 /* Mi print */
1196 ret = mi_list_channels(channels, count, channel_name);
1197 if (ret) {
1198 ret = CMD_ERROR;
1199 goto error;
1200 }
1201 } else {
1202 /* Pretty print */
1203 if (count) {
1204 MSG("Channels:\n-------------");
1205 }
1206
1207 for (i = 0; i < count; i++) {
1208 if (channel_name != NULL) {
1209 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1210 chan_found = 1;
1211 } else {
1212 continue;
1213 }
1214 }
1215 print_channel(&channels[i]);
1216
1217 /* Listing events per channel */
1218 ret = list_events(channels[i].name);
1219 if (ret) {
1220 goto error;
1221 }
1222
1223 if (chan_found) {
1224 break;
1225 }
1226 }
1227
1228 if (!chan_found && channel_name != NULL) {
1229 ret = CMD_ERROR;
1230 ERR("Channel %s not found", channel_name);
1231 goto error;
1232 }
1233 }
1234 error:
1235 free(channels);
1236
1237 error_channels:
1238 return ret;
1239 }
1240
1241 /*
1242 * List tracker PID(s) of session and domain.
1243 */
1244 static int list_tracker_pids(void)
1245 {
1246 int ret = 0;
1247 int enabled;
1248 int *pids = NULL;
1249 size_t nr_pids;
1250
1251 ret = lttng_list_tracker_pids(handle,
1252 &enabled, &pids, &nr_pids);
1253 if (ret) {
1254 return ret;
1255 }
1256 if (enabled) {
1257 int i;
1258 _MSG("PID tracker: [");
1259
1260 /* Mi tracker_pid element*/
1261 if (writer) {
1262 /* Open tracker_pid and targets elements */
1263 ret = mi_lttng_pid_tracker_open(writer);
1264 if (ret) {
1265 goto end;
1266 }
1267 }
1268
1269 for (i = 0; i < nr_pids; i++) {
1270 if (i) {
1271 _MSG(",");
1272 }
1273 _MSG(" %d", pids[i]);
1274
1275 /* Mi */
1276 if (writer) {
1277 ret = mi_lttng_pid_target(writer, pids[i], 0);
1278 if (ret) {
1279 goto end;
1280 }
1281 }
1282 }
1283 _MSG(" ]\n\n");
1284
1285 /* Mi close tracker_pid and targets */
1286 if (writer) {
1287 ret = mi_lttng_close_multi_element(writer,2);
1288 if (ret) {
1289 goto end;
1290 }
1291 }
1292 }
1293 end:
1294 free(pids);
1295 return ret;
1296
1297 }
1298
1299 /*
1300 * List all tracker of a domain
1301 */
1302 static int list_trackers(void)
1303 {
1304 int ret;
1305
1306 /* Trackers listing */
1307 if (lttng_opt_mi) {
1308 ret = mi_lttng_trackers_open(writer);
1309 if (ret) {
1310 goto end;
1311 }
1312 }
1313
1314 /* pid tracker */
1315 ret = list_tracker_pids();
1316 if (ret) {
1317 goto end;
1318 }
1319
1320 if (lttng_opt_mi) {
1321 /* Close trackers element */
1322 ret = mi_lttng_writer_close_element(writer);
1323 if (ret) {
1324 goto end;
1325 }
1326 }
1327
1328 end:
1329 return ret;
1330 }
1331
1332 /*
1333 * Machine interface
1334 * Find the session with session_name as name
1335 * and print his informations.
1336 */
1337 static int mi_list_session(const char *session_name,
1338 struct lttng_session *sessions, int count)
1339 {
1340 int ret, i;
1341 unsigned int session_found = 0;
1342
1343 if (session_name == NULL) {
1344 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1345 goto end;
1346 }
1347
1348 for (i = 0; i < count; i++) {
1349 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1350 /* We need to leave it open to append other informations
1351 * like domain, channel, events etc.*/
1352 session_found = 1;
1353 ret = mi_lttng_session(writer, &sessions[i], 1);
1354 if (ret) {
1355 goto end;
1356 }
1357 break;
1358 }
1359 }
1360
1361 if (!session_found) {
1362 ERR("Session '%s' not found", session_name);
1363 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1364 goto end;
1365 }
1366
1367 end:
1368 return ret;
1369 }
1370
1371 /*
1372 * Machine interface
1373 * List all availables session
1374 */
1375 static int mi_list_sessions(struct lttng_session *sessions, int count)
1376 {
1377 int ret, i;
1378
1379 /* Opening sessions element */
1380 ret = mi_lttng_sessions_open(writer);
1381 if (ret) {
1382 goto end;
1383 }
1384
1385 /* Listing sessions */
1386 for (i = 0; i < count; i++) {
1387 ret = mi_lttng_session(writer, &sessions[i], 0);
1388 if (ret) {
1389 goto end;
1390 }
1391 }
1392
1393 /* Closing sessions element */
1394 ret = mi_lttng_writer_close_element(writer);
1395 if (ret) {
1396 goto end;
1397 }
1398
1399 end:
1400 return ret;
1401 }
1402
1403 /*
1404 * List available tracing session. List only basic information.
1405 *
1406 * If session_name is NULL, all sessions are listed.
1407 */
1408 static int list_sessions(const char *session_name)
1409 {
1410 int ret = CMD_SUCCESS;
1411 int count, i;
1412 unsigned int session_found = 0;
1413 struct lttng_session *sessions;
1414
1415 count = lttng_list_sessions(&sessions);
1416 DBG("Session count %d", count);
1417 if (count < 0) {
1418 ret = CMD_ERROR;
1419 ERR("%s", lttng_strerror(count));
1420 goto end;
1421 }
1422
1423 if (lttng_opt_mi) {
1424 /* Mi */
1425 if (session_name == NULL) {
1426 /* List all session */
1427 ret = mi_list_sessions(sessions, count);
1428 } else {
1429 /* Note : this return an open session element */
1430 ret = mi_list_session(session_name, sessions, count);
1431 }
1432 if (ret) {
1433 ret = CMD_ERROR;
1434 goto error;
1435 }
1436 } else {
1437 /* Pretty print */
1438 if (count == 0) {
1439 MSG("Currently no available tracing session");
1440 goto end;
1441 }
1442
1443 if (session_name == NULL) {
1444 MSG("Available tracing sessions:");
1445 }
1446
1447
1448 for (i = 0; i < count; i++) {
1449 if (session_name != NULL) {
1450 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1451 session_found = 1;
1452 MSG("Tracing session %s: [%s%s]", session_name,
1453 active_string(sessions[i].enabled),
1454 snapshot_string(sessions[i].snapshot_mode));
1455 MSG("%sTrace path: %s\n", indent4, sessions[i].path);
1456 break;
1457 }
1458 } else {
1459 MSG(" %d) %s (%s) [%s%s]", i + 1,
1460 sessions[i].name, sessions[i].path,
1461 active_string(sessions[i].enabled),
1462 snapshot_string(sessions[i].snapshot_mode));
1463 MSG("%sTrace path: %s", indent4, sessions[i].path);
1464 if (sessions[i].live_timer_interval != 0) {
1465 MSG("%sLive timer interval (usec): %u", indent4,
1466 sessions[i].live_timer_interval);
1467 }
1468 MSG("");
1469 }
1470 }
1471
1472 if (!session_found && session_name != NULL) {
1473 ERR("Session '%s' not found", session_name);
1474 ret = CMD_ERROR;
1475 goto error;
1476 }
1477
1478 if (session_name == NULL) {
1479 MSG("\nUse lttng list <session_name> for more details");
1480 }
1481 }
1482
1483 error:
1484 free(sessions);
1485 end:
1486 return ret;
1487 }
1488
1489
1490 /*
1491 * Machine Interface
1492 * list available domain(s) for a session.
1493 */
1494 static int mi_list_domains(struct lttng_domain *domains, int count)
1495 {
1496 int i, ret;
1497 /* Open domains element */
1498 ret = mi_lttng_domains_open(writer);
1499 if (ret) {
1500 goto end;
1501 }
1502
1503 for (i = 0; i < count; i++) {
1504 ret = mi_lttng_domain(writer, &domains[i] , 0);
1505 if (ret) {
1506 goto end;
1507 }
1508 }
1509
1510 /* Closing domains element */
1511 ret = mi_lttng_writer_close_element(writer);
1512 if (ret) {
1513 goto end;
1514 }
1515 end:
1516 return ret;
1517 }
1518
1519 /*
1520 * List available domain(s) for a session.
1521 */
1522 static int list_domains(const char *session_name)
1523 {
1524 int i, count, ret = CMD_SUCCESS;
1525 struct lttng_domain *domains = NULL;
1526
1527
1528 count = lttng_list_domains(session_name, &domains);
1529 if (count < 0) {
1530 ret = CMD_ERROR;
1531 ERR("%s", lttng_strerror(count));
1532 goto end;
1533 }
1534
1535 if (lttng_opt_mi) {
1536 /* Mi output */
1537 ret = mi_list_domains(domains, count);
1538 if (ret) {
1539 ret = CMD_ERROR;
1540 goto error;
1541 }
1542 } else {
1543 /* Pretty print */
1544 MSG("Domains:\n-------------");
1545 if (count == 0) {
1546 MSG(" None");
1547 goto end;
1548 }
1549
1550 for (i = 0; i < count; i++) {
1551 switch (domains[i].type) {
1552 case LTTNG_DOMAIN_KERNEL:
1553 MSG(" - Kernel");
1554 break;
1555 case LTTNG_DOMAIN_UST:
1556 MSG(" - UST global");
1557 break;
1558 case LTTNG_DOMAIN_JUL:
1559 MSG(" - JUL (Java Util Logging)");
1560 break;
1561 case LTTNG_DOMAIN_LOG4J:
1562 MSG(" - LOG4j (Logging for Java)");
1563 break;
1564 case LTTNG_DOMAIN_PYTHON:
1565 MSG(" - Python (logging)");
1566 break;
1567 default:
1568 break;
1569 }
1570 }
1571 }
1572
1573 error:
1574 free(domains);
1575
1576 end:
1577 return ret;
1578 }
1579
1580 /*
1581 * The 'list <options>' first level command
1582 */
1583 int cmd_list(int argc, const char **argv)
1584 {
1585 int opt, ret = CMD_SUCCESS;
1586 const char *session_name;
1587 static poptContext pc;
1588 struct lttng_domain domain;
1589 struct lttng_domain *domains = NULL;
1590
1591 memset(&domain, 0, sizeof(domain));
1592
1593 if (argc < 1) {
1594 usage(stderr);
1595 ret = CMD_ERROR;
1596 goto end;
1597 }
1598
1599 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1600 poptReadDefaultConfig(pc, 0);
1601
1602 while ((opt = poptGetNextOpt(pc)) != -1) {
1603 switch (opt) {
1604 case OPT_HELP:
1605 usage(stdout);
1606 goto end;
1607 case OPT_USERSPACE:
1608 opt_userspace = 1;
1609 break;
1610 case OPT_LIST_OPTIONS:
1611 list_cmd_options(stdout, long_options);
1612 goto end;
1613 default:
1614 usage(stderr);
1615 ret = CMD_UNDEFINED;
1616 goto end;
1617 }
1618 }
1619
1620 /* Mi check */
1621 if (lttng_opt_mi) {
1622 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1623 if (!writer) {
1624 ret = CMD_ERROR;
1625 goto end;
1626 }
1627
1628 /* Open command element */
1629 ret = mi_lttng_writer_command_open(writer,
1630 mi_lttng_element_command_list);
1631 if (ret) {
1632 ret = CMD_ERROR;
1633 goto end;
1634 }
1635
1636 /* Open output element */
1637 ret = mi_lttng_writer_open_element(writer,
1638 mi_lttng_element_command_output);
1639 if (ret) {
1640 ret = CMD_ERROR;
1641 goto end;
1642 }
1643 }
1644
1645 /* Get session name (trailing argument) */
1646 session_name = poptGetArg(pc);
1647 DBG2("Session name: %s", session_name);
1648
1649 if (opt_kernel) {
1650 domain.type = LTTNG_DOMAIN_KERNEL;
1651 } else if (opt_userspace) {
1652 DBG2("Listing userspace global domain");
1653 domain.type = LTTNG_DOMAIN_UST;
1654 } else if (opt_jul) {
1655 DBG2("Listing JUL domain");
1656 domain.type = LTTNG_DOMAIN_JUL;
1657 } else if (opt_log4j) {
1658 domain.type = LTTNG_DOMAIN_LOG4J;
1659 } else if (opt_python) {
1660 domain.type = LTTNG_DOMAIN_PYTHON;
1661 }
1662
1663 if (!opt_kernel && opt_syscall) {
1664 WARN("--syscall will only work with the Kernel domain (-k)");
1665 ret = CMD_ERROR;
1666 goto end;
1667 }
1668
1669 if (opt_kernel || opt_userspace || opt_jul || opt_log4j || opt_python) {
1670 handle = lttng_create_handle(session_name, &domain);
1671 if (handle == NULL) {
1672 ret = CMD_FATAL;
1673 goto end;
1674 }
1675 }
1676
1677 if (session_name == NULL) {
1678 if (!opt_kernel && !opt_userspace && !opt_jul && !opt_log4j
1679 && !opt_python) {
1680 ret = list_sessions(NULL);
1681 if (ret) {
1682 goto end;
1683 }
1684 }
1685 if (opt_kernel) {
1686 if (opt_syscall) {
1687 ret = list_syscalls();
1688 if (ret) {
1689 goto end;
1690 }
1691 } else {
1692 ret = list_kernel_events();
1693 if (ret) {
1694 goto end;
1695 }
1696 }
1697 }
1698 if (opt_userspace) {
1699 if (opt_fields) {
1700 ret = list_ust_event_fields();
1701 } else {
1702 ret = list_ust_events();
1703 }
1704 if (ret) {
1705 goto end;
1706 }
1707 }
1708 if (opt_jul || opt_log4j || opt_python) {
1709 ret = list_agent_events();
1710 if (ret) {
1711 goto end;
1712 }
1713 }
1714 } else {
1715 /* List session attributes */
1716 if (lttng_opt_mi) {
1717 /* Open element sessions
1718 * Present for xml consistency */
1719 ret = mi_lttng_sessions_open(writer);
1720 if (ret) {
1721 goto end;
1722 }
1723 }
1724 /* MI: the ouptut of list_sessions is an unclosed session element */
1725 ret = list_sessions(session_name);
1726 if (ret) {
1727 goto end;
1728 }
1729
1730 /* Domain listing */
1731 if (opt_domain) {
1732 ret = list_domains(session_name);
1733 goto end;
1734 }
1735
1736 /* Channel listing */
1737 if (opt_kernel || opt_userspace) {
1738 if (lttng_opt_mi) {
1739 /* Add of domains and domain element for xml
1740 * consistency and validation
1741 */
1742 ret = mi_lttng_domains_open(writer);
1743 if (ret) {
1744 goto end;
1745 }
1746
1747 /* Open domain and leave it open for
1748 * nested channels printing */
1749 ret = mi_lttng_domain(writer, &domain, 1);
1750 if (ret) {
1751 goto end;
1752 }
1753
1754 }
1755
1756
1757 /* Trackers */
1758 ret = list_trackers();
1759 if (ret) {
1760 goto end;
1761 }
1762
1763 /* Channels */
1764 ret = list_channels(opt_channel);
1765 if (ret) {
1766 goto end;
1767 }
1768
1769 if (lttng_opt_mi) {
1770 /* Close domain and domain element */
1771 ret = mi_lttng_close_multi_element(writer, 2);
1772 }
1773 if (ret) {
1774 goto end;
1775 }
1776
1777
1778 } else {
1779 int i, nb_domain;
1780
1781 /* We want all domain(s) */
1782 nb_domain = lttng_list_domains(session_name, &domains);
1783 if (nb_domain < 0) {
1784 ret = CMD_ERROR;
1785 ERR("%s", lttng_strerror(nb_domain));
1786 goto end;
1787 }
1788
1789 if (lttng_opt_mi) {
1790 ret = mi_lttng_domains_open(writer);
1791 if (ret) {
1792 ret = CMD_ERROR;
1793 goto end;
1794 }
1795 }
1796
1797 for (i = 0; i < nb_domain; i++) {
1798 switch (domains[i].type) {
1799 case LTTNG_DOMAIN_KERNEL:
1800 MSG("=== Domain: Kernel ===\n");
1801 break;
1802 case LTTNG_DOMAIN_UST:
1803 MSG("=== Domain: UST global ===\n");
1804 MSG("Buffer type: %s\n",
1805 domains[i].buf_type ==
1806 LTTNG_BUFFER_PER_PID ? "per PID" : "per UID");
1807 break;
1808 case LTTNG_DOMAIN_JUL:
1809 MSG("=== Domain: JUL (Java Util Logging) ===\n");
1810 break;
1811 case LTTNG_DOMAIN_LOG4J:
1812 MSG("=== Domain: LOG4j (Logging for Java) ===\n");
1813 break;
1814 case LTTNG_DOMAIN_PYTHON:
1815 MSG("=== Domain: Python (logging) ===\n");
1816 break;
1817 default:
1818 MSG("=== Domain: Unimplemented ===\n");
1819 break;
1820 }
1821
1822 if (lttng_opt_mi) {
1823 ret = mi_lttng_domain(writer, &domains[i], 1);
1824 if (ret) {
1825 ret = CMD_ERROR;
1826 goto end;
1827 }
1828 }
1829
1830 /* Clean handle before creating a new one */
1831 if (handle) {
1832 lttng_destroy_handle(handle);
1833 }
1834
1835 handle = lttng_create_handle(session_name, &domains[i]);
1836 if (handle == NULL) {
1837 ret = CMD_FATAL;
1838 goto end;
1839 }
1840
1841 if (domains[i].type == LTTNG_DOMAIN_JUL ||
1842 domains[i].type == LTTNG_DOMAIN_LOG4J ||
1843 domains[i].type == LTTNG_DOMAIN_PYTHON) {
1844 ret = list_session_agent_events();
1845 if (ret) {
1846 goto end;
1847 }
1848 continue;
1849 }
1850
1851 switch (domains[i].type) {
1852 case LTTNG_DOMAIN_KERNEL:
1853 case LTTNG_DOMAIN_UST:
1854 ret = list_trackers();
1855 if (ret) {
1856 goto end;
1857 }
1858 break;
1859 default:
1860 break;
1861 }
1862
1863 ret = list_channels(opt_channel);
1864 if (ret) {
1865 goto end;
1866 }
1867
1868 if (lttng_opt_mi) {
1869 /* Close domain element */
1870 ret = mi_lttng_writer_close_element(writer);
1871 if (ret) {
1872 ret = CMD_ERROR;
1873 goto end;
1874 }
1875 }
1876
1877 }
1878 if (lttng_opt_mi) {
1879 /* Close the domains, session and sessions element */
1880 ret = mi_lttng_close_multi_element(writer, 3);
1881 if (ret) {
1882 ret = CMD_ERROR;
1883 goto end;
1884 }
1885 }
1886 }
1887 }
1888
1889 /* Mi closing */
1890 if (lttng_opt_mi) {
1891 /* Close output element */
1892 ret = mi_lttng_writer_close_element(writer);
1893 if (ret) {
1894 ret = CMD_ERROR;
1895 goto end;
1896 }
1897
1898 /* Command element close */
1899 ret = mi_lttng_writer_command_close(writer);
1900 if (ret) {
1901 ret = CMD_ERROR;
1902 goto end;
1903 }
1904 }
1905 end:
1906 /* Mi clean-up */
1907 if (writer && mi_lttng_writer_destroy(writer)) {
1908 /* Preserve original error code */
1909 ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
1910 }
1911
1912 free(domains);
1913 if (handle) {
1914 lttng_destroy_handle(handle);
1915 }
1916
1917 poptFreeContext(pc);
1918 return ret;
1919 }
LTTng 2.0 tools and control repository
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