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Add --enable-embedded-help option to embed --help messages in binaries
[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 #ifdef LTTNG_EMBED_HELP
46 static const char help_msg[] =
47 #include <lttng-list.1.h>
48 ;
49 #endif
50
51 enum {
52 OPT_HELP = 1,
53 OPT_USERSPACE,
54 OPT_LIST_OPTIONS,
55 };
56
57 static struct lttng_handle *handle;
58 static struct mi_writer *writer;
59
60 static struct poptOption long_options[] = {
61 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
62 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
63 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
64 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
65 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
66 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
67 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
68 {"channel", 'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0},
69 {"domain", 'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0},
70 {"fields", 'f', POPT_ARG_VAL, &opt_fields, 1, 0, 0},
71 {"syscall", 'S', POPT_ARG_VAL, &opt_syscall, 1, 0, 0},
72 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
73 {0, 0, 0, 0, 0, 0, 0}
74 };
75
76 /*
77 * Get command line from /proc for a specific pid.
78 *
79 * On success, return an allocated string pointer to the proc cmdline.
80 * On error, return NULL.
81 */
82 static char *get_cmdline_by_pid(pid_t pid)
83 {
84 int ret;
85 FILE *fp = NULL;
86 char *cmdline = NULL;
87 /* Can't go bigger than /proc/LTTNG_MAX_PID/cmdline */
88 char path[sizeof("/proc//cmdline") + sizeof(LTTNG_MAX_PID_STR) - 1];
89
90 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
91 fp = fopen(path, "r");
92 if (fp == NULL) {
93 goto end;
94 }
95
96 /* Caller must free() *cmdline */
97 cmdline = zmalloc(PATH_MAX);
98 if (!cmdline) {
99 PERROR("malloc cmdline");
100 goto end;
101 }
102 ret = fread(cmdline, 1, PATH_MAX, fp);
103 if (ret < 0) {
104 PERROR("fread proc list");
105 }
106
107 end:
108 if (fp) {
109 fclose(fp);
110 }
111 return cmdline;
112 }
113
114 static
115 const char *active_string(int value)
116 {
117 switch (value) {
118 case 0: return "inactive";
119 case 1: return "active";
120 case -1: return "";
121 default: return NULL;
122 }
123 }
124
125 static const char *snapshot_string(int value)
126 {
127 switch (value) {
128 case 1:
129 return " snapshot";
130 default:
131 return "";
132 }
133 }
134
135 static
136 const char *enabled_string(int value)
137 {
138 switch (value) {
139 case 0: return " [disabled]";
140 case 1: return " [enabled]";
141 case -1: return "";
142 default: return NULL;
143 }
144 }
145
146 static
147 const char *safe_string(const char *str)
148 {
149 return str ? str : "";
150 }
151
152 static const char *logleveltype_string(enum lttng_loglevel_type value)
153 {
154 switch (value) {
155 case LTTNG_EVENT_LOGLEVEL_ALL:
156 return ":";
157 case LTTNG_EVENT_LOGLEVEL_RANGE:
158 return " <=";
159 case LTTNG_EVENT_LOGLEVEL_SINGLE:
160 return " ==";
161 default:
162 return " <<TYPE UNKN>>";
163 }
164 }
165
166 static const char *bitness_event(enum lttng_event_flag flags)
167 {
168 if (flags & LTTNG_EVENT_FLAG_SYSCALL_32) {
169 if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
170 return " [32/64-bit]";
171 } else {
172 return " [32-bit]";
173 }
174 } else if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
175 return " [64-bit]";
176 } else {
177 return "";
178 }
179 }
180
181 /*
182 * Get exclusion names message for a single event.
183 *
184 * Returned pointer must be freed by caller. Returns NULL on error.
185 */
186 static char *get_exclusion_names_msg(struct lttng_event *event)
187 {
188 int ret;
189 int exclusion_count;
190 char *exclusion_msg = NULL;
191 char *at;
192 size_t i;
193 const char * const exclusion_fmt = " [exclusions: ";
194 const size_t exclusion_fmt_len = strlen(exclusion_fmt);
195
196 exclusion_count = lttng_event_get_exclusion_name_count(event);
197 if (exclusion_count < 0) {
198 goto end;
199 } else if (exclusion_count == 0) {
200 /*
201 * No exclusions: return copy of empty string so that
202 * it can be freed by caller.
203 */
204 exclusion_msg = strdup("");
205 goto end;
206 }
207
208 /*
209 * exclusion_msg's size is bounded by the exclusion_fmt string,
210 * a comma per entry, the entry count (fixed-size), a closing
211 * bracket, and a trailing \0.
212 */
213 exclusion_msg = malloc(exclusion_count +
214 exclusion_count * LTTNG_SYMBOL_NAME_LEN +
215 exclusion_fmt_len + 1);
216 if (!exclusion_msg) {
217 goto end;
218 }
219
220 at = strcpy(exclusion_msg, exclusion_fmt) + exclusion_fmt_len;
221 for (i = 0; i < exclusion_count; ++i) {
222 const char *name;
223
224 /* Append comma between exclusion names */
225 if (i > 0) {
226 *at = ',';
227 at++;
228 }
229
230 ret = lttng_event_get_exclusion_name(event, i, &name);
231 if (ret) {
232 /* Prints '?' on local error; should never happen */
233 *at = '?';
234 at++;
235 continue;
236 }
237
238 /* Append exclusion name */
239 at += sprintf(at, "%s", name);
240 }
241
242 /* This also puts a final '\0' at the end of exclusion_msg */
243 strcpy(at, "]");
244
245 end:
246 return exclusion_msg;
247 }
248
249 /*
250 * Pretty print single event.
251 */
252 static void print_events(struct lttng_event *event)
253 {
254 int ret;
255 const char *filter_str;
256 char *filter_msg = NULL;
257 char *exclusion_msg = NULL;
258
259 ret = lttng_event_get_filter_expression(event, &filter_str);
260
261 if (ret) {
262 filter_msg = strdup(" [failed to retrieve filter]");
263 } else if (filter_str) {
264 const char * const filter_fmt = " [filter: '%s']";
265
266 filter_msg = malloc(strlen(filter_str) +
267 strlen(filter_fmt) + 1);
268 if (filter_msg) {
269 sprintf(filter_msg, filter_fmt,
270 filter_str);
271 }
272 }
273
274 exclusion_msg = get_exclusion_names_msg(event);
275 if (!exclusion_msg) {
276 exclusion_msg = strdup(" [failed to retrieve exclusions]");
277 }
278
279 switch (event->type) {
280 case LTTNG_EVENT_TRACEPOINT:
281 {
282 if (event->loglevel != -1) {
283 MSG("%s%s (loglevel%s %s (%d)) (type: tracepoint)%s%s%s",
284 indent6,
285 event->name,
286 logleveltype_string(event->loglevel_type),
287 mi_lttng_loglevel_string(event->loglevel, handle->domain.type),
288 event->loglevel,
289 enabled_string(event->enabled),
290 safe_string(exclusion_msg),
291 safe_string(filter_msg));
292 } else {
293 MSG("%s%s (type: tracepoint)%s%s%s",
294 indent6,
295 event->name,
296 enabled_string(event->enabled),
297 safe_string(exclusion_msg),
298 safe_string(filter_msg));
299 }
300 break;
301 }
302 case LTTNG_EVENT_FUNCTION:
303 MSG("%s%s (type: function)%s%s", indent6,
304 event->name, enabled_string(event->enabled),
305 safe_string(filter_msg));
306 if (event->attr.probe.addr != 0) {
307 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
308 } else {
309 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
310 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
311 }
312 break;
313 case LTTNG_EVENT_PROBE:
314 MSG("%s%s (type: probe)%s%s", indent6,
315 event->name, enabled_string(event->enabled),
316 safe_string(filter_msg));
317 if (event->attr.probe.addr != 0) {
318 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
319 } else {
320 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
321 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
322 }
323 break;
324 case LTTNG_EVENT_FUNCTION_ENTRY:
325 MSG("%s%s (type: function)%s%s", indent6,
326 event->name, enabled_string(event->enabled),
327 safe_string(filter_msg));
328 MSG("%ssymbol: \"%s\"", indent8, event->attr.ftrace.symbol_name);
329 break;
330 case LTTNG_EVENT_SYSCALL:
331 MSG("%s%s%s%s%s%s", indent6, event->name,
332 (opt_syscall ? "" : " (type:syscall)"),
333 enabled_string(event->enabled),
334 bitness_event(event->flags),
335 safe_string(filter_msg));
336 break;
337 case LTTNG_EVENT_NOOP:
338 MSG("%s (type: noop)%s%s", indent6,
339 enabled_string(event->enabled),
340 safe_string(filter_msg));
341 break;
342 case LTTNG_EVENT_ALL:
343 /* We should never have "all" events in list. */
344 assert(0);
345 break;
346 }
347
348 free(filter_msg);
349 free(exclusion_msg);
350 }
351
352 static const char *field_type(struct lttng_event_field *field)
353 {
354 switch(field->type) {
355 case LTTNG_EVENT_FIELD_INTEGER:
356 return "integer";
357 case LTTNG_EVENT_FIELD_ENUM:
358 return "enum";
359 case LTTNG_EVENT_FIELD_FLOAT:
360 return "float";
361 case LTTNG_EVENT_FIELD_STRING:
362 return "string";
363 case LTTNG_EVENT_FIELD_OTHER:
364 default: /* fall-through */
365 return "unknown";
366 }
367 }
368
369 /*
370 * Pretty print single event fields.
371 */
372 static void print_event_field(struct lttng_event_field *field)
373 {
374 if (!field->field_name[0]) {
375 return;
376 }
377 MSG("%sfield: %s (%s)%s", indent8, field->field_name,
378 field_type(field), field->nowrite ? " [no write]" : "");
379 }
380
381 /*
382 * Machine interface
383 * Jul and ust event listing
384 */
385 static int mi_list_agent_ust_events(struct lttng_event *events, int count,
386 struct lttng_domain *domain)
387 {
388 int ret, i;
389 pid_t cur_pid = 0;
390 char *cmdline = NULL;
391 int pid_element_open = 0;
392
393 /* Open domains element */
394 ret = mi_lttng_domains_open(writer);
395 if (ret) {
396 goto end;
397 }
398
399 /* Write domain */
400 ret = mi_lttng_domain(writer, domain, 1);
401 if (ret) {
402 goto end;
403 }
404
405 /* Open pids element element */
406 ret = mi_lttng_pids_open(writer);
407 if (ret) {
408 goto end;
409 }
410
411 for (i = 0; i < count; i++) {
412 if (cur_pid != events[i].pid) {
413 if (pid_element_open) {
414 /* Close the previous events and pid element */
415 ret = mi_lttng_close_multi_element(writer, 2);
416 if (ret) {
417 goto end;
418 }
419 pid_element_open = 0;
420 }
421
422 cur_pid = events[i].pid;
423 cmdline = get_cmdline_by_pid(cur_pid);
424 if (!cmdline) {
425 ret = CMD_ERROR;
426 goto end;
427 }
428
429 if (!pid_element_open) {
430 /* Open and write a pid element */
431 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
432 if (ret) {
433 goto error;
434 }
435
436 /* Open events element */
437 ret = mi_lttng_events_open(writer);
438 if (ret) {
439 goto error;
440 }
441
442 pid_element_open = 1;
443 }
444 free(cmdline);
445 }
446
447 /* Write an event */
448 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
449 if (ret) {
450 goto end;
451 }
452 }
453
454 /* Close pids */
455 ret = mi_lttng_writer_close_element(writer);
456 if (ret) {
457 goto end;
458 }
459
460 /* Close domain, domains */
461 ret = mi_lttng_close_multi_element(writer, 2);
462 end:
463 return ret;
464 error:
465 free(cmdline);
466 return ret;
467 }
468
469 static int list_agent_events(void)
470 {
471 int i, size, ret = CMD_SUCCESS;
472 struct lttng_domain domain;
473 struct lttng_handle *handle = NULL;
474 struct lttng_event *event_list = NULL;
475 pid_t cur_pid = 0;
476 char *cmdline = NULL;
477 const char *agent_domain_str;
478
479 memset(&domain, 0, sizeof(domain));
480 if (opt_jul) {
481 domain.type = LTTNG_DOMAIN_JUL;
482 } else if (opt_log4j) {
483 domain.type = LTTNG_DOMAIN_LOG4J;
484 } else if (opt_python) {
485 domain.type = LTTNG_DOMAIN_PYTHON;
486 } else {
487 ERR("Invalid agent domain selected.");
488 ret = CMD_ERROR;
489 goto error;
490 }
491
492 agent_domain_str = get_domain_str(domain.type);
493
494 DBG("Getting %s tracing events", agent_domain_str);
495
496 handle = lttng_create_handle(NULL, &domain);
497 if (handle == NULL) {
498 ret = CMD_ERROR;
499 goto end;
500 }
501
502 size = lttng_list_tracepoints(handle, &event_list);
503 if (size < 0) {
504 ERR("Unable to list %s events: %s", agent_domain_str,
505 lttng_strerror(size));
506 ret = CMD_ERROR;
507 goto end;
508 }
509
510 if (lttng_opt_mi) {
511 /* Mi print */
512 ret = mi_list_agent_ust_events(event_list, size, &domain);
513 if (ret) {
514 ret = CMD_ERROR;
515 goto error;
516 }
517 } else {
518 /* Pretty print */
519 MSG("%s events (Logger name):\n-------------------------",
520 agent_domain_str);
521
522 if (size == 0) {
523 MSG("None");
524 }
525
526 for (i = 0; i < size; i++) {
527 if (cur_pid != event_list[i].pid) {
528 cur_pid = event_list[i].pid;
529 cmdline = get_cmdline_by_pid(cur_pid);
530 if (cmdline == NULL) {
531 ret = CMD_ERROR;
532 goto error;
533 }
534 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
535 free(cmdline);
536 }
537 MSG("%s- %s", indent6, event_list[i].name);
538 }
539
540 MSG("");
541 }
542
543 error:
544 free(event_list);
545 end:
546 lttng_destroy_handle(handle);
547 return ret;
548 }
549
550 /*
551 * Ask session daemon for all user space tracepoints available.
552 */
553 static int list_ust_events(void)
554 {
555 int i, size, ret = CMD_SUCCESS;
556 struct lttng_domain domain;
557 struct lttng_handle *handle;
558 struct lttng_event *event_list = NULL;
559 pid_t cur_pid = 0;
560 char *cmdline = NULL;
561
562 memset(&domain, 0, sizeof(domain));
563
564 DBG("Getting UST tracing events");
565
566 domain.type = LTTNG_DOMAIN_UST;
567
568 handle = lttng_create_handle(NULL, &domain);
569 if (handle == NULL) {
570 ret = CMD_ERROR;
571 goto end;
572 }
573
574 size = lttng_list_tracepoints(handle, &event_list);
575 if (size < 0) {
576 ERR("Unable to list UST events: %s", lttng_strerror(size));
577 ret = CMD_ERROR;
578 goto error;
579 }
580
581 if (lttng_opt_mi) {
582 /* Mi print */
583 ret = mi_list_agent_ust_events(event_list, size, &domain);
584 } else {
585 /* Pretty print */
586 MSG("UST events:\n-------------");
587
588 if (size == 0) {
589 MSG("None");
590 }
591
592 for (i = 0; i < size; i++) {
593 if (cur_pid != event_list[i].pid) {
594 cur_pid = event_list[i].pid;
595 cmdline = get_cmdline_by_pid(cur_pid);
596 if (cmdline == NULL) {
597 ret = CMD_ERROR;
598 goto error;
599 }
600 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
601 free(cmdline);
602 }
603 print_events(&event_list[i]);
604 }
605
606 MSG("");
607 }
608
609 error:
610 free(event_list);
611 end:
612 lttng_destroy_handle(handle);
613 return ret;
614 }
615
616 /*
617 * Machine interface
618 * List all ust event with their fields
619 */
620 static int mi_list_ust_event_fields(struct lttng_event_field *fields, int count,
621 struct lttng_domain *domain)
622 {
623 int ret, i;
624 pid_t cur_pid = 0;
625 char *cmdline = NULL;
626 int pid_element_open = 0;
627 int event_element_open = 0;
628 struct lttng_event cur_event;
629
630 memset(&cur_event, 0, sizeof(cur_event));
631
632 /* Open domains element */
633 ret = mi_lttng_domains_open(writer);
634 if (ret) {
635 goto end;
636 }
637
638 /* Write domain */
639 ret = mi_lttng_domain(writer, domain, 1);
640 if (ret) {
641 goto end;
642 }
643
644 /* Open pids element */
645 ret = mi_lttng_pids_open(writer);
646 if (ret) {
647 goto end;
648 }
649
650 for (i = 0; i < count; i++) {
651 if (cur_pid != fields[i].event.pid) {
652 if (pid_element_open) {
653 if (event_element_open) {
654 /* Close the previous field element and event. */
655 ret = mi_lttng_close_multi_element(writer, 2);
656 if (ret) {
657 goto end;
658 }
659 event_element_open = 0;
660 }
661 /* Close the previous events, pid element */
662 ret = mi_lttng_close_multi_element(writer, 2);
663 if (ret) {
664 goto end;
665 }
666 pid_element_open = 0;
667 }
668
669 cur_pid = fields[i].event.pid;
670 cmdline = get_cmdline_by_pid(cur_pid);
671 if (!pid_element_open) {
672 /* Open and write a pid element */
673 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
674 if (ret) {
675 goto error;
676 }
677
678 /* Open events element */
679 ret = mi_lttng_events_open(writer);
680 if (ret) {
681 goto error;
682 }
683 pid_element_open = 1;
684 }
685 free(cmdline);
686 /* Wipe current event since we are about to print a new PID. */
687 memset(&cur_event, 0, sizeof(cur_event));
688 }
689
690 if (strcmp(cur_event.name, fields[i].event.name) != 0) {
691 if (event_element_open) {
692 /* Close the previous fields element and the previous event */
693 ret = mi_lttng_close_multi_element(writer, 2);
694 if (ret) {
695 goto end;
696 }
697 event_element_open = 0;
698 }
699
700 memcpy(&cur_event, &fields[i].event,
701 sizeof(cur_event));
702
703 if (!event_element_open) {
704 /* Open and write the event */
705 ret = mi_lttng_event(writer, &cur_event, 1,
706 handle->domain.type);
707 if (ret) {
708 goto end;
709 }
710
711 /* Open a fields element */
712 ret = mi_lttng_event_fields_open(writer);
713 if (ret) {
714 goto end;
715 }
716 event_element_open = 1;
717 }
718 }
719
720 /* Print the event_field */
721 ret = mi_lttng_event_field(writer, &fields[i]);
722 if (ret) {
723 goto end;
724 }
725 }
726
727 /* Close pid, domain, domains */
728 ret = mi_lttng_close_multi_element(writer, 3);
729 end:
730 return ret;
731 error:
732 free(cmdline);
733 return ret;
734 }
735
736 /*
737 * Ask session daemon for all user space tracepoint fields available.
738 */
739 static int list_ust_event_fields(void)
740 {
741 int i, size, ret = CMD_SUCCESS;
742 struct lttng_domain domain;
743 struct lttng_handle *handle;
744 struct lttng_event_field *event_field_list;
745 pid_t cur_pid = 0;
746 char *cmdline = NULL;
747
748 struct lttng_event cur_event;
749
750 memset(&domain, 0, sizeof(domain));
751 memset(&cur_event, 0, sizeof(cur_event));
752
753 DBG("Getting UST tracing event fields");
754
755 domain.type = LTTNG_DOMAIN_UST;
756
757 handle = lttng_create_handle(NULL, &domain);
758 if (handle == NULL) {
759 ret = CMD_ERROR;
760 goto end;
761 }
762
763 size = lttng_list_tracepoint_fields(handle, &event_field_list);
764 if (size < 0) {
765 ERR("Unable to list UST event fields: %s", lttng_strerror(size));
766 ret = CMD_ERROR;
767 goto end;
768 }
769
770 if (lttng_opt_mi) {
771 /* Mi print */
772 ret = mi_list_ust_event_fields(event_field_list, size, &domain);
773 if (ret) {
774 ret = CMD_ERROR;
775 goto error;
776 }
777 } else {
778 /* Pretty print */
779 MSG("UST events:\n-------------");
780
781 if (size == 0) {
782 MSG("None");
783 }
784
785 for (i = 0; i < size; i++) {
786 if (cur_pid != event_field_list[i].event.pid) {
787 cur_pid = event_field_list[i].event.pid;
788 cmdline = get_cmdline_by_pid(cur_pid);
789 if (cmdline == NULL) {
790 ret = CMD_ERROR;
791 goto error;
792 }
793 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
794 free(cmdline);
795 /* Wipe current event since we are about to print a new PID. */
796 memset(&cur_event, 0, sizeof(cur_event));
797 }
798 if (strcmp(cur_event.name, event_field_list[i].event.name) != 0) {
799 print_events(&event_field_list[i].event);
800 memcpy(&cur_event, &event_field_list[i].event,
801 sizeof(cur_event));
802 }
803 print_event_field(&event_field_list[i]);
804 }
805
806 MSG("");
807 }
808
809 error:
810 free(event_field_list);
811 end:
812 lttng_destroy_handle(handle);
813 return ret;
814 }
815
816 /*
817 * Machine interface
818 * Print a list of kernel events
819 */
820 static int mi_list_kernel_events(struct lttng_event *events, int count,
821 struct lttng_domain *domain)
822 {
823 int ret, i;
824
825 /* Open domains element */
826 ret = mi_lttng_domains_open(writer);
827 if (ret) {
828 goto end;
829 }
830
831 /* Write domain */
832 ret = mi_lttng_domain(writer, domain, 1);
833 if (ret) {
834 goto end;
835 }
836
837 /* Open events */
838 ret = mi_lttng_events_open(writer);
839 if (ret) {
840 goto end;
841 }
842
843 for (i = 0; i < count; i++) {
844 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
845 if (ret) {
846 goto end;
847 }
848 }
849
850 /* close events, domain and domains */
851 ret = mi_lttng_close_multi_element(writer, 3);
852 if (ret) {
853 goto end;
854 }
855
856 end:
857 return ret;
858 }
859
860 /*
861 * Ask for all trace events in the kernel
862 */
863 static int list_kernel_events(void)
864 {
865 int i, size, ret = CMD_SUCCESS;
866 struct lttng_domain domain;
867 struct lttng_handle *handle;
868 struct lttng_event *event_list;
869
870 memset(&domain, 0, sizeof(domain));
871
872 DBG("Getting kernel tracing events");
873
874 domain.type = LTTNG_DOMAIN_KERNEL;
875
876 handle = lttng_create_handle(NULL, &domain);
877 if (handle == NULL) {
878 ret = CMD_ERROR;
879 goto error;
880 }
881
882 size = lttng_list_tracepoints(handle, &event_list);
883 if (size < 0) {
884 ERR("Unable to list kernel events: %s", lttng_strerror(size));
885 lttng_destroy_handle(handle);
886 return CMD_ERROR;
887 }
888
889 if (lttng_opt_mi) {
890 /* Mi print */
891 ret = mi_list_kernel_events(event_list, size, &domain);
892 if (ret) {
893 ret = CMD_ERROR;
894 goto end;
895 }
896 } else {
897 MSG("Kernel events:\n-------------");
898
899 for (i = 0; i < size; i++) {
900 print_events(&event_list[i]);
901 }
902
903 MSG("");
904 }
905
906 end:
907 free(event_list);
908
909 lttng_destroy_handle(handle);
910 return ret;
911
912 error:
913 lttng_destroy_handle(handle);
914 return ret;
915 }
916
917 /*
918 * Machine interface
919 * Print a list of system calls.
920 */
921 static int mi_list_syscalls(struct lttng_event *events, int count)
922 {
923 int ret, i;
924
925 /* Open events */
926 ret = mi_lttng_events_open(writer);
927 if (ret) {
928 goto end;
929 }
930
931 for (i = 0; i < count; i++) {
932 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
933 if (ret) {
934 goto end;
935 }
936 }
937
938 /* Close events. */
939 ret = mi_lttng_writer_close_element(writer);
940 if (ret) {
941 goto end;
942 }
943
944 end:
945 return ret;
946 }
947
948 /*
949 * Ask for kernel system calls.
950 */
951 static int list_syscalls(void)
952 {
953 int i, size, ret = CMD_SUCCESS;
954 struct lttng_event *event_list;
955
956 DBG("Getting kernel system call events");
957
958 size = lttng_list_syscalls(&event_list);
959 if (size < 0) {
960 ERR("Unable to list system calls: %s", lttng_strerror(size));
961 ret = CMD_ERROR;
962 goto error;
963 }
964
965 if (lttng_opt_mi) {
966 /* Mi print */
967 ret = mi_list_syscalls(event_list, size);
968 if (ret) {
969 ret = CMD_ERROR;
970 goto end;
971 }
972 } else {
973 MSG("System calls:\n-------------");
974
975 for (i = 0; i < size; i++) {
976 print_events(&event_list[i]);
977 }
978
979 MSG("");
980 }
981
982 end:
983 free(event_list);
984 return ret;
985
986 error:
987 return ret;
988 }
989
990 /*
991 * Machine Interface
992 * Print a list of agent events
993 */
994 static int mi_list_session_agent_events(struct lttng_event *events, int count)
995 {
996 int ret, i;
997
998 /* Open events element */
999 ret = mi_lttng_events_open(writer);
1000 if (ret) {
1001 goto end;
1002 }
1003
1004 for (i = 0; i < count; i++) {
1005 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1006 if (ret) {
1007 goto end;
1008 }
1009 }
1010
1011 /* Close events element */
1012 ret = mi_lttng_writer_close_element(writer);
1013
1014 end:
1015 return ret;
1016 }
1017
1018 /*
1019 * List agent events for a specific session using the handle.
1020 *
1021 * Return CMD_SUCCESS on success else a negative value.
1022 */
1023 static int list_session_agent_events(void)
1024 {
1025 int ret = CMD_SUCCESS, count, i;
1026 struct lttng_event *events = NULL;
1027
1028 count = lttng_list_events(handle, "", &events);
1029 if (count < 0) {
1030 ret = CMD_ERROR;
1031 ERR("%s", lttng_strerror(count));
1032 goto error;
1033 }
1034
1035 if (lttng_opt_mi) {
1036 /* Mi print */
1037 ret = mi_list_session_agent_events(events, count);
1038 if (ret) {
1039 ret = CMD_ERROR;
1040 goto end;
1041 }
1042 } else {
1043 /* Pretty print */
1044 MSG("Events (Logger name):\n---------------------");
1045 if (count == 0) {
1046 MSG("%sNone\n", indent6);
1047 goto end;
1048 }
1049
1050 for (i = 0; i < count; i++) {
1051 const char *filter_str;
1052 char *filter_msg = NULL;
1053 struct lttng_event *event = &events[i];
1054
1055 ret = lttng_event_get_filter_expression(event,
1056 &filter_str);
1057 if (ret) {
1058 filter_msg = strdup(" [failed to retrieve filter]");
1059 } else if (filter_str) {
1060 const char * const filter_fmt =
1061 " [filter: '%s']";
1062
1063 filter_msg = malloc(strlen(filter_str) +
1064 strlen(filter_fmt) + 1);
1065 if (filter_msg) {
1066 sprintf(filter_msg, filter_fmt,
1067 filter_str);
1068 }
1069 }
1070
1071 if (event->loglevel_type !=
1072 LTTNG_EVENT_LOGLEVEL_ALL) {
1073 MSG("%s- %s%s (loglevel%s %s)%s", indent4,
1074 event->name,
1075 enabled_string(event->enabled),
1076 logleveltype_string(
1077 event->loglevel_type),
1078 mi_lttng_loglevel_string(
1079 event->loglevel,
1080 handle->domain.type),
1081 safe_string(filter_msg));
1082 } else {
1083 MSG("%s- %s%s%s", indent4, event->name,
1084 enabled_string(event->enabled),
1085 safe_string(filter_msg));
1086 }
1087 free(filter_msg);
1088 }
1089
1090 MSG("");
1091 }
1092
1093 end:
1094 free(events);
1095 error:
1096 return ret;
1097 }
1098
1099 /*
1100 * Machine interface
1101 * print a list of event
1102 */
1103 static int mi_list_events(struct lttng_event *events, int count)
1104 {
1105 int ret, i;
1106
1107 /* Open events element */
1108 ret = mi_lttng_events_open(writer);
1109 if (ret) {
1110 goto end;
1111 }
1112
1113 for (i = 0; i < count; i++) {
1114 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1115 if (ret) {
1116 goto end;
1117 }
1118 }
1119
1120 /* Close events element */
1121 ret = mi_lttng_writer_close_element(writer);
1122
1123 end:
1124 return ret;
1125 }
1126
1127 /*
1128 * List events of channel of session and domain.
1129 */
1130 static int list_events(const char *channel_name)
1131 {
1132 int ret = CMD_SUCCESS, count, i;
1133 struct lttng_event *events = NULL;
1134
1135 count = lttng_list_events(handle, channel_name, &events);
1136 if (count < 0) {
1137 ret = CMD_ERROR;
1138 ERR("%s", lttng_strerror(count));
1139 goto error;
1140 }
1141
1142 if (lttng_opt_mi) {
1143 /* Mi print */
1144 ret = mi_list_events(events, count);
1145 if (ret) {
1146 ret = CMD_ERROR;
1147 goto end;
1148 }
1149 } else {
1150 /* Pretty print */
1151 MSG("\n%sEvents:", indent4);
1152 if (count == 0) {
1153 MSG("%sNone\n", indent6);
1154 goto end;
1155 }
1156
1157 for (i = 0; i < count; i++) {
1158 print_events(&events[i]);
1159 }
1160
1161 MSG("");
1162 }
1163 end:
1164 free(events);
1165 error:
1166 return ret;
1167 }
1168
1169 /*
1170 * Pretty print channel
1171 */
1172 static void print_channel(struct lttng_channel *channel)
1173 {
1174 int ret;
1175 uint64_t discarded_events, lost_packets, monitor_timer_interval;
1176
1177 ret = lttng_channel_get_discarded_event_count(channel,
1178 &discarded_events);
1179 if (ret) {
1180 ERR("Failed to retrieve discarded event count of channel");
1181 return;
1182 }
1183
1184 ret = lttng_channel_get_lost_packet_count(channel,
1185 &lost_packets);
1186 if (ret) {
1187 ERR("Failed to retrieve lost packet count of channel");
1188 return;
1189 }
1190
1191 ret = lttng_channel_get_monitor_timer_interval(channel,
1192 &monitor_timer_interval);
1193 if (ret) {
1194 ERR("Failed to retrieve monitor interval of channel");
1195 return;
1196 }
1197
1198 MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled));
1199
1200 MSG("%sAttributes:", indent4);
1201 MSG("%soverwrite mode: %d", indent6, channel->attr.overwrite);
1202 MSG("%ssubbuffers size: %" PRIu64, indent6, channel->attr.subbuf_size);
1203 MSG("%snumber of subbuffers: %" PRIu64, indent6, channel->attr.num_subbuf);
1204 MSG("%sswitch timer interval: %u", indent6, channel->attr.switch_timer_interval);
1205 MSG("%sread timer interval: %u", indent6, channel->attr.read_timer_interval);
1206 MSG("%smonitor timer interval: %" PRIu64, indent6, monitor_timer_interval);
1207 MSG("%strace file count: %" PRIu64, indent6, channel->attr.tracefile_count);
1208 MSG("%strace file size (bytes): %" PRIu64, indent6, channel->attr.tracefile_size);
1209 MSG("%sdiscarded events: %" PRIu64, indent6, discarded_events);
1210 MSG("%slost packets: %" PRIu64, indent6, lost_packets);
1211 switch (channel->attr.output) {
1212 case LTTNG_EVENT_SPLICE:
1213 MSG("%soutput: splice()", indent6);
1214 break;
1215 case LTTNG_EVENT_MMAP:
1216 MSG("%soutput: mmap()", indent6);
1217 break;
1218 }
1219 }
1220
1221 /*
1222 * Machine interface
1223 * Print a list of channel
1224 *
1225 */
1226 static int mi_list_channels(struct lttng_channel *channels, int count,
1227 const char *channel_name)
1228 {
1229 int i, ret;
1230 unsigned int chan_found = 0;
1231
1232 /* Open channels element */
1233 ret = mi_lttng_channels_open(writer);
1234 if (ret) {
1235 goto error;
1236 }
1237
1238 for (i = 0; i < count; i++) {
1239 if (channel_name != NULL) {
1240 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1241 chan_found = 1;
1242 } else {
1243 continue;
1244 }
1245 }
1246
1247 /* Write channel element and leave it open */
1248 ret = mi_lttng_channel(writer, &channels[i], 1);
1249 if (ret) {
1250 goto error;
1251 }
1252
1253 /* Listing events per channel */
1254 ret = list_events(channels[i].name);
1255 if (ret) {
1256 goto error;
1257 }
1258
1259 /* Closing the channel element we opened earlier */
1260 ret = mi_lttng_writer_close_element(writer);
1261 if (ret) {
1262 goto error;
1263 }
1264
1265 if (chan_found) {
1266 break;
1267 }
1268 }
1269
1270 /* Close channels element */
1271 ret = mi_lttng_writer_close_element(writer);
1272 if (ret) {
1273 goto error;
1274 }
1275
1276 error:
1277 return ret;
1278 }
1279
1280 /*
1281 * List channel(s) of session and domain.
1282 *
1283 * If channel_name is NULL, all channels are listed.
1284 */
1285 static int list_channels(const char *channel_name)
1286 {
1287 int count, i, ret = CMD_SUCCESS;
1288 unsigned int chan_found = 0;
1289 struct lttng_channel *channels = NULL;
1290
1291 DBG("Listing channel(s) (%s)", channel_name ? : "<all>");
1292
1293 count = lttng_list_channels(handle, &channels);
1294 if (count < 0) {
1295 switch (-count) {
1296 case LTTNG_ERR_KERN_CHAN_NOT_FOUND:
1297 if (lttng_opt_mi) {
1298 /* When printing mi this is not an error
1299 * but an empty channels element */
1300 count = 0;
1301 } else {
1302 ret = CMD_SUCCESS;
1303 WARN("No kernel channel");
1304 goto error_channels;
1305 }
1306 break;
1307 default:
1308 /* We had a real error */
1309 ret = CMD_ERROR;
1310 ERR("%s", lttng_strerror(count));
1311 goto error_channels;
1312 break;
1313 }
1314 }
1315
1316 if (lttng_opt_mi) {
1317 /* Mi print */
1318 ret = mi_list_channels(channels, count, channel_name);
1319 if (ret) {
1320 ret = CMD_ERROR;
1321 goto error;
1322 }
1323 } else {
1324 /* Pretty print */
1325 if (count) {
1326 MSG("Channels:\n-------------");
1327 }
1328
1329 for (i = 0; i < count; i++) {
1330 if (channel_name != NULL) {
1331 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1332 chan_found = 1;
1333 } else {
1334 continue;
1335 }
1336 }
1337 print_channel(&channels[i]);
1338
1339 /* Listing events per channel */
1340 ret = list_events(channels[i].name);
1341 if (ret) {
1342 goto error;
1343 }
1344
1345 if (chan_found) {
1346 break;
1347 }
1348 }
1349
1350 if (!chan_found && channel_name != NULL) {
1351 ret = CMD_ERROR;
1352 ERR("Channel %s not found", channel_name);
1353 goto error;
1354 }
1355 }
1356 error:
1357 free(channels);
1358
1359 error_channels:
1360 return ret;
1361 }
1362
1363 /*
1364 * List tracker PID(s) of session and domain.
1365 */
1366 static int list_tracker_pids(void)
1367 {
1368 int ret = 0;
1369 int enabled;
1370 int *pids = NULL;
1371 size_t nr_pids;
1372
1373 ret = lttng_list_tracker_pids(handle,
1374 &enabled, &pids, &nr_pids);
1375 if (ret) {
1376 return ret;
1377 }
1378 if (enabled) {
1379 int i;
1380 _MSG("PID tracker: [");
1381
1382 /* Mi tracker_pid element*/
1383 if (writer) {
1384 /* Open tracker_pid and targets elements */
1385 ret = mi_lttng_pid_tracker_open(writer);
1386 if (ret) {
1387 goto end;
1388 }
1389 }
1390
1391 for (i = 0; i < nr_pids; i++) {
1392 if (i) {
1393 _MSG(",");
1394 }
1395 _MSG(" %d", pids[i]);
1396
1397 /* Mi */
1398 if (writer) {
1399 ret = mi_lttng_pid_target(writer, pids[i], 0);
1400 if (ret) {
1401 goto end;
1402 }
1403 }
1404 }
1405 _MSG(" ]\n\n");
1406
1407 /* Mi close tracker_pid and targets */
1408 if (writer) {
1409 ret = mi_lttng_close_multi_element(writer,2);
1410 if (ret) {
1411 goto end;
1412 }
1413 }
1414 }
1415 end:
1416 free(pids);
1417 return ret;
1418
1419 }
1420
1421 /*
1422 * List all tracker of a domain
1423 */
1424 static int list_trackers(void)
1425 {
1426 int ret;
1427
1428 /* Trackers listing */
1429 if (lttng_opt_mi) {
1430 ret = mi_lttng_trackers_open(writer);
1431 if (ret) {
1432 goto end;
1433 }
1434 }
1435
1436 /* pid tracker */
1437 ret = list_tracker_pids();
1438 if (ret) {
1439 goto end;
1440 }
1441
1442 if (lttng_opt_mi) {
1443 /* Close trackers element */
1444 ret = mi_lttng_writer_close_element(writer);
1445 if (ret) {
1446 goto end;
1447 }
1448 }
1449
1450 end:
1451 return ret;
1452 }
1453
1454 /*
1455 * Machine interface
1456 * Find the session with session_name as name
1457 * and print his informations.
1458 */
1459 static int mi_list_session(const char *session_name,
1460 struct lttng_session *sessions, int count)
1461 {
1462 int ret, i;
1463 unsigned int session_found = 0;
1464
1465 if (session_name == NULL) {
1466 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1467 goto end;
1468 }
1469
1470 for (i = 0; i < count; i++) {
1471 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1472 /* We need to leave it open to append other informations
1473 * like domain, channel, events etc.*/
1474 session_found = 1;
1475 ret = mi_lttng_session(writer, &sessions[i], 1);
1476 if (ret) {
1477 goto end;
1478 }
1479 break;
1480 }
1481 }
1482
1483 if (!session_found) {
1484 ERR("Session '%s' not found", session_name);
1485 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1486 goto end;
1487 }
1488
1489 end:
1490 return ret;
1491 }
1492
1493 /*
1494 * Machine interface
1495 * List all availables session
1496 */
1497 static int mi_list_sessions(struct lttng_session *sessions, int count)
1498 {
1499 int ret, i;
1500
1501 /* Opening sessions element */
1502 ret = mi_lttng_sessions_open(writer);
1503 if (ret) {
1504 goto end;
1505 }
1506
1507 /* Listing sessions */
1508 for (i = 0; i < count; i++) {
1509 ret = mi_lttng_session(writer, &sessions[i], 0);
1510 if (ret) {
1511 goto end;
1512 }
1513 }
1514
1515 /* Closing sessions element */
1516 ret = mi_lttng_writer_close_element(writer);
1517 if (ret) {
1518 goto end;
1519 }
1520
1521 end:
1522 return ret;
1523 }
1524
1525 /*
1526 * List available tracing session. List only basic information.
1527 *
1528 * If session_name is NULL, all sessions are listed.
1529 */
1530 static int list_sessions(const char *session_name)
1531 {
1532 int ret = CMD_SUCCESS;
1533 int count, i;
1534 unsigned int session_found = 0;
1535 struct lttng_session *sessions;
1536
1537 count = lttng_list_sessions(&sessions);
1538 DBG("Session count %d", count);
1539 if (count < 0) {
1540 ret = CMD_ERROR;
1541 ERR("%s", lttng_strerror(count));
1542 goto end;
1543 }
1544
1545 if (lttng_opt_mi) {
1546 /* Mi */
1547 if (session_name == NULL) {
1548 /* List all session */
1549 ret = mi_list_sessions(sessions, count);
1550 } else {
1551 /* Note : this return an open session element */
1552 ret = mi_list_session(session_name, sessions, count);
1553 }
1554 if (ret) {
1555 ret = CMD_ERROR;
1556 goto error;
1557 }
1558 } else {
1559 /* Pretty print */
1560 if (count == 0) {
1561 MSG("Currently no available tracing session");
1562 goto end;
1563 }
1564
1565 if (session_name == NULL) {
1566 MSG("Available tracing sessions:");
1567 }
1568
1569
1570 for (i = 0; i < count; i++) {
1571 if (session_name != NULL) {
1572 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1573 session_found = 1;
1574 MSG("Tracing session %s: [%s%s]", session_name,
1575 active_string(sessions[i].enabled),
1576 snapshot_string(sessions[i].snapshot_mode));
1577 MSG("%sTrace path: %s\n", indent4, sessions[i].path);
1578 break;
1579 }
1580 } else {
1581 MSG(" %d) %s (%s) [%s%s]", i + 1,
1582 sessions[i].name, sessions[i].path,
1583 active_string(sessions[i].enabled),
1584 snapshot_string(sessions[i].snapshot_mode));
1585 MSG("%sTrace path: %s", indent4, sessions[i].path);
1586 if (sessions[i].live_timer_interval != 0) {
1587 MSG("%sLive timer interval (usec): %u", indent4,
1588 sessions[i].live_timer_interval);
1589 }
1590 MSG("");
1591 }
1592 }
1593
1594 if (!session_found && session_name != NULL) {
1595 ERR("Session '%s' not found", session_name);
1596 ret = CMD_ERROR;
1597 goto error;
1598 }
1599
1600 if (session_name == NULL) {
1601 MSG("\nUse lttng list <session_name> for more details");
1602 }
1603 }
1604
1605 error:
1606 free(sessions);
1607 end:
1608 return ret;
1609 }
1610
1611
1612 /*
1613 * Machine Interface
1614 * list available domain(s) for a session.
1615 */
1616 static int mi_list_domains(struct lttng_domain *domains, int count)
1617 {
1618 int i, ret;
1619 /* Open domains element */
1620 ret = mi_lttng_domains_open(writer);
1621 if (ret) {
1622 goto end;
1623 }
1624
1625 for (i = 0; i < count; i++) {
1626 ret = mi_lttng_domain(writer, &domains[i] , 0);
1627 if (ret) {
1628 goto end;
1629 }
1630 }
1631
1632 /* Closing domains element */
1633 ret = mi_lttng_writer_close_element(writer);
1634 if (ret) {
1635 goto end;
1636 }
1637 end:
1638 return ret;
1639 }
1640
1641 /*
1642 * List available domain(s) for a session.
1643 */
1644 static int list_domains(const char *session_name)
1645 {
1646 int i, count, ret = CMD_SUCCESS;
1647 struct lttng_domain *domains = NULL;
1648
1649
1650 count = lttng_list_domains(session_name, &domains);
1651 if (count < 0) {
1652 ret = CMD_ERROR;
1653 ERR("%s", lttng_strerror(count));
1654 goto end;
1655 }
1656
1657 if (lttng_opt_mi) {
1658 /* Mi output */
1659 ret = mi_list_domains(domains, count);
1660 if (ret) {
1661 ret = CMD_ERROR;
1662 goto error;
1663 }
1664 } else {
1665 /* Pretty print */
1666 MSG("Domains:\n-------------");
1667 if (count == 0) {
1668 MSG(" None");
1669 goto end;
1670 }
1671
1672 for (i = 0; i < count; i++) {
1673 switch (domains[i].type) {
1674 case LTTNG_DOMAIN_KERNEL:
1675 MSG(" - Kernel");
1676 break;
1677 case LTTNG_DOMAIN_UST:
1678 MSG(" - UST global");
1679 break;
1680 case LTTNG_DOMAIN_JUL:
1681 MSG(" - JUL (Java Util Logging)");
1682 break;
1683 case LTTNG_DOMAIN_LOG4J:
1684 MSG(" - LOG4j (Logging for Java)");
1685 break;
1686 case LTTNG_DOMAIN_PYTHON:
1687 MSG(" - Python (logging)");
1688 break;
1689 default:
1690 break;
1691 }
1692 }
1693 }
1694
1695 error:
1696 free(domains);
1697
1698 end:
1699 return ret;
1700 }
1701
1702 /*
1703 * The 'list <options>' first level command
1704 */
1705 int cmd_list(int argc, const char **argv)
1706 {
1707 int opt, ret = CMD_SUCCESS;
1708 const char *session_name;
1709 static poptContext pc;
1710 struct lttng_domain domain;
1711 struct lttng_domain *domains = NULL;
1712
1713 memset(&domain, 0, sizeof(domain));
1714
1715 if (argc < 1) {
1716 ret = CMD_ERROR;
1717 goto end;
1718 }
1719
1720 pc = poptGetContext(NULL, argc, argv, long_options, 0);
1721 poptReadDefaultConfig(pc, 0);
1722
1723 while ((opt = poptGetNextOpt(pc)) != -1) {
1724 switch (opt) {
1725 case OPT_HELP:
1726 SHOW_HELP();
1727 goto end;
1728 case OPT_USERSPACE:
1729 opt_userspace = 1;
1730 break;
1731 case OPT_LIST_OPTIONS:
1732 list_cmd_options(stdout, long_options);
1733 goto end;
1734 default:
1735 ret = CMD_UNDEFINED;
1736 goto end;
1737 }
1738 }
1739
1740 /* Mi check */
1741 if (lttng_opt_mi) {
1742 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
1743 if (!writer) {
1744 ret = CMD_ERROR;
1745 goto end;
1746 }
1747
1748 /* Open command element */
1749 ret = mi_lttng_writer_command_open(writer,
1750 mi_lttng_element_command_list);
1751 if (ret) {
1752 ret = CMD_ERROR;
1753 goto end;
1754 }
1755
1756 /* Open output element */
1757 ret = mi_lttng_writer_open_element(writer,
1758 mi_lttng_element_command_output);
1759 if (ret) {
1760 ret = CMD_ERROR;
1761 goto end;
1762 }
1763 }
1764
1765 /* Get session name (trailing argument) */
1766 session_name = poptGetArg(pc);
1767 DBG2("Session name: %s", session_name);
1768
1769 if (opt_kernel) {
1770 domain.type = LTTNG_DOMAIN_KERNEL;
1771 } else if (opt_userspace) {
1772 DBG2("Listing userspace global domain");
1773 domain.type = LTTNG_DOMAIN_UST;
1774 } else if (opt_jul) {
1775 DBG2("Listing JUL domain");
1776 domain.type = LTTNG_DOMAIN_JUL;
1777 } else if (opt_log4j) {
1778 domain.type = LTTNG_DOMAIN_LOG4J;
1779 } else if (opt_python) {
1780 domain.type = LTTNG_DOMAIN_PYTHON;
1781 }
1782
1783 if (!opt_kernel && opt_syscall) {
1784 WARN("--syscall will only work with the Kernel domain (-k)");
1785 ret = CMD_ERROR;
1786 goto end;
1787 }
1788
1789 if (opt_kernel || opt_userspace || opt_jul || opt_log4j || opt_python) {
1790 handle = lttng_create_handle(session_name, &domain);
1791 if (handle == NULL) {
1792 ret = CMD_FATAL;
1793 goto end;
1794 }
1795 }
1796
1797 if (session_name == NULL) {
1798 if (!opt_kernel && !opt_userspace && !opt_jul && !opt_log4j
1799 && !opt_python) {
1800 ret = list_sessions(NULL);
1801 if (ret) {
1802 goto end;
1803 }
1804 }
1805 if (opt_kernel) {
1806 if (opt_syscall) {
1807 ret = list_syscalls();
1808 if (ret) {
1809 goto end;
1810 }
1811 } else {
1812 ret = list_kernel_events();
1813 if (ret) {
1814 goto end;
1815 }
1816 }
1817 }
1818 if (opt_userspace) {
1819 if (opt_fields) {
1820 ret = list_ust_event_fields();
1821 } else {
1822 ret = list_ust_events();
1823 }
1824 if (ret) {
1825 goto end;
1826 }
1827 }
1828 if (opt_jul || opt_log4j || opt_python) {
1829 ret = list_agent_events();
1830 if (ret) {
1831 goto end;
1832 }
1833 }
1834 } else {
1835 /* List session attributes */
1836 if (lttng_opt_mi) {
1837 /* Open element sessions
1838 * Present for xml consistency */
1839 ret = mi_lttng_sessions_open(writer);
1840 if (ret) {
1841 goto end;
1842 }
1843 }
1844 /* MI: the ouptut of list_sessions is an unclosed session element */
1845 ret = list_sessions(session_name);
1846 if (ret) {
1847 goto end;
1848 }
1849
1850 /* Domain listing */
1851 if (opt_domain) {
1852 ret = list_domains(session_name);
1853 goto end;
1854 }
1855
1856 /* Channel listing */
1857 if (opt_kernel || opt_userspace) {
1858 if (lttng_opt_mi) {
1859 /* Add of domains and domain element for xml
1860 * consistency and validation
1861 */
1862 ret = mi_lttng_domains_open(writer);
1863 if (ret) {
1864 goto end;
1865 }
1866
1867 /* Open domain and leave it open for
1868 * nested channels printing */
1869 ret = mi_lttng_domain(writer, &domain, 1);
1870 if (ret) {
1871 goto end;
1872 }
1873
1874 }
1875
1876
1877 /* Trackers */
1878 ret = list_trackers();
1879 if (ret) {
1880 goto end;
1881 }
1882
1883 /* Channels */
1884 ret = list_channels(opt_channel);
1885 if (ret) {
1886 goto end;
1887 }
1888
1889 if (lttng_opt_mi) {
1890 /* Close domain and domain element */
1891 ret = mi_lttng_close_multi_element(writer, 2);
1892 }
1893 if (ret) {
1894 goto end;
1895 }
1896
1897
1898 } else {
1899 int i, nb_domain;
1900
1901 /* We want all domain(s) */
1902 nb_domain = lttng_list_domains(session_name, &domains);
1903 if (nb_domain < 0) {
1904 ret = CMD_ERROR;
1905 ERR("%s", lttng_strerror(nb_domain));
1906 goto end;
1907 }
1908
1909 if (lttng_opt_mi) {
1910 ret = mi_lttng_domains_open(writer);
1911 if (ret) {
1912 ret = CMD_ERROR;
1913 goto end;
1914 }
1915 }
1916
1917 for (i = 0; i < nb_domain; i++) {
1918 switch (domains[i].type) {
1919 case LTTNG_DOMAIN_KERNEL:
1920 MSG("=== Domain: Kernel ===\n");
1921 break;
1922 case LTTNG_DOMAIN_UST:
1923 MSG("=== Domain: UST global ===\n");
1924 MSG("Buffer type: %s\n",
1925 domains[i].buf_type ==
1926 LTTNG_BUFFER_PER_PID ? "per PID" : "per UID");
1927 break;
1928 case LTTNG_DOMAIN_JUL:
1929 MSG("=== Domain: JUL (Java Util Logging) ===\n");
1930 break;
1931 case LTTNG_DOMAIN_LOG4J:
1932 MSG("=== Domain: LOG4j (Logging for Java) ===\n");
1933 break;
1934 case LTTNG_DOMAIN_PYTHON:
1935 MSG("=== Domain: Python (logging) ===\n");
1936 break;
1937 default:
1938 MSG("=== Domain: Unimplemented ===\n");
1939 break;
1940 }
1941
1942 if (lttng_opt_mi) {
1943 ret = mi_lttng_domain(writer, &domains[i], 1);
1944 if (ret) {
1945 ret = CMD_ERROR;
1946 goto end;
1947 }
1948 }
1949
1950 /* Clean handle before creating a new one */
1951 if (handle) {
1952 lttng_destroy_handle(handle);
1953 }
1954
1955 handle = lttng_create_handle(session_name, &domains[i]);
1956 if (handle == NULL) {
1957 ret = CMD_FATAL;
1958 goto end;
1959 }
1960
1961 if (domains[i].type == LTTNG_DOMAIN_JUL ||
1962 domains[i].type == LTTNG_DOMAIN_LOG4J ||
1963 domains[i].type == LTTNG_DOMAIN_PYTHON) {
1964 ret = list_session_agent_events();
1965 if (ret) {
1966 goto end;
1967 }
1968
1969 goto next_domain;
1970 }
1971
1972 switch (domains[i].type) {
1973 case LTTNG_DOMAIN_KERNEL:
1974 case LTTNG_DOMAIN_UST:
1975 ret = list_trackers();
1976 if (ret) {
1977 goto end;
1978 }
1979 break;
1980 default:
1981 break;
1982 }
1983
1984 ret = list_channels(opt_channel);
1985 if (ret) {
1986 goto end;
1987 }
1988
1989 next_domain:
1990 if (lttng_opt_mi) {
1991 /* Close domain element */
1992 ret = mi_lttng_writer_close_element(writer);
1993 if (ret) {
1994 ret = CMD_ERROR;
1995 goto end;
1996 }
1997 }
1998
1999 }
2000 if (lttng_opt_mi) {
2001 /* Close the domains, session and sessions element */
2002 ret = mi_lttng_close_multi_element(writer, 3);
2003 if (ret) {
2004 ret = CMD_ERROR;
2005 goto end;
2006 }
2007 }
2008 }
2009 }
2010
2011 /* Mi closing */
2012 if (lttng_opt_mi) {
2013 /* Close output element */
2014 ret = mi_lttng_writer_close_element(writer);
2015 if (ret) {
2016 ret = CMD_ERROR;
2017 goto end;
2018 }
2019
2020 /* Command element close */
2021 ret = mi_lttng_writer_command_close(writer);
2022 if (ret) {
2023 ret = CMD_ERROR;
2024 goto end;
2025 }
2026 }
2027 end:
2028 /* Mi clean-up */
2029 if (writer && mi_lttng_writer_destroy(writer)) {
2030 /* Preserve original error code */
2031 ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
2032 }
2033
2034 free(domains);
2035 if (handle) {
2036 lttng_destroy_handle(handle);
2037 }
2038
2039 poptFreeContext(pc);
2040 return ret;
2041 }
LTTng 2.0 tools and control repository
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