Fix: lttng: leak of userspace probe path on listing
[lttng-tools.git] / src / bin / lttng / commands / list.c
1 /*
2 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
3 * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0-only
6 *
7 */
8
9 #include <stdint.h>
10 #define _LGPL_SOURCE
11 #include <inttypes.h>
12 #include <popt.h>
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <assert.h>
17
18 #include <common/mi-lttng.h>
19 #include <common/time.h>
20 #include <common/tracker.h>
21 #include <lttng/constant.h>
22 #include <lttng/tracker.h>
23
24 #include "../command.h"
25
26 static int opt_userspace;
27 static int opt_kernel;
28 static int opt_jul;
29 static int opt_log4j;
30 static int opt_python;
31 static char *opt_channel;
32 static int opt_domain;
33 static int opt_fields;
34 static int opt_syscall;
35
36 const char *indent4 = " ";
37 const char *indent6 = " ";
38 const char *indent8 = " ";
39
40 #ifdef LTTNG_EMBED_HELP
41 static const char help_msg[] =
42 #include <lttng-list.1.h>
43 ;
44 #endif
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 /* Only set when listing a single session. */
56 static struct lttng_session listed_session;
57
58 static struct poptOption long_options[] = {
59 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
60 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
61 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
62 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
63 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
64 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
65 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
66 {"channel", 'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0},
67 {"domain", 'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0},
68 {"fields", 'f', POPT_ARG_VAL, &opt_fields, 1, 0, 0},
69 {"syscall", 'S', POPT_ARG_VAL, &opt_syscall, 1, 0, 0},
70 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
71 {0, 0, 0, 0, 0, 0, 0}
72 };
73
74 /*
75 * Get command line from /proc for a specific pid.
76 *
77 * On success, return an allocated string pointer to the proc cmdline.
78 * On error, return NULL.
79 */
80 static char *get_cmdline_by_pid(pid_t pid)
81 {
82 int ret;
83 FILE *fp = NULL;
84 char *cmdline = NULL;
85 /* Can't go bigger than /proc/LTTNG_MAX_PID/cmdline */
86 char path[sizeof("/proc//cmdline") + sizeof(LTTNG_MAX_PID_STR) - 1];
87
88 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
89 fp = fopen(path, "r");
90 if (fp == NULL) {
91 goto end;
92 }
93
94 /* Caller must free() *cmdline */
95 cmdline = zmalloc(PATH_MAX);
96 if (!cmdline) {
97 PERROR("malloc cmdline");
98 goto end;
99 }
100 ret = fread(cmdline, 1, PATH_MAX, fp);
101 if (ret < 0) {
102 PERROR("fread proc list");
103 }
104
105 end:
106 if (fp) {
107 fclose(fp);
108 }
109 return cmdline;
110 }
111
112 static
113 const char *active_string(int value)
114 {
115 switch (value) {
116 case 0: return "inactive";
117 case 1: return "active";
118 case -1: return "";
119 default: return NULL;
120 }
121 }
122
123 static const char *snapshot_string(int value)
124 {
125 switch (value) {
126 case 1:
127 return " snapshot";
128 default:
129 return "";
130 }
131 }
132
133 static
134 const char *enabled_string(int value)
135 {
136 switch (value) {
137 case 0: return " [disabled]";
138 case 1: return " [enabled]";
139 case -1: return "";
140 default: return NULL;
141 }
142 }
143
144 static
145 const char *safe_string(const char *str)
146 {
147 return str ? str : "";
148 }
149
150 static const char *logleveltype_string(enum lttng_loglevel_type value)
151 {
152 switch (value) {
153 case LTTNG_EVENT_LOGLEVEL_ALL:
154 return ":";
155 case LTTNG_EVENT_LOGLEVEL_RANGE:
156 return " <=";
157 case LTTNG_EVENT_LOGLEVEL_SINGLE:
158 return " ==";
159 default:
160 return " <<TYPE UNKN>>";
161 }
162 }
163
164 static const char *bitness_event(enum lttng_event_flag flags)
165 {
166 if (flags & LTTNG_EVENT_FLAG_SYSCALL_32) {
167 if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
168 return " [32/64-bit]";
169 } else {
170 return " [32-bit]";
171 }
172 } else if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
173 return " [64-bit]";
174 } else {
175 return "";
176 }
177 }
178
179 /*
180 * Get exclusion names message for a single event.
181 *
182 * Returned pointer must be freed by caller. Returns NULL on error.
183 */
184 static char *get_exclusion_names_msg(struct lttng_event *event)
185 {
186 int ret;
187 int exclusion_count;
188 char *exclusion_msg = NULL;
189 char *at;
190 size_t i;
191 const char * const exclusion_fmt = " [exclusions: ";
192 const size_t exclusion_fmt_len = strlen(exclusion_fmt);
193
194 exclusion_count = lttng_event_get_exclusion_name_count(event);
195 if (exclusion_count < 0) {
196 goto end;
197 } else if (exclusion_count == 0) {
198 /*
199 * No exclusions: return copy of empty string so that
200 * it can be freed by caller.
201 */
202 exclusion_msg = strdup("");
203 goto end;
204 }
205
206 /*
207 * exclusion_msg's size is bounded by the exclusion_fmt string,
208 * a comma per entry, the entry count (fixed-size), a closing
209 * bracket, and a trailing \0.
210 */
211 exclusion_msg = malloc(exclusion_count +
212 exclusion_count * LTTNG_SYMBOL_NAME_LEN +
213 exclusion_fmt_len + 1);
214 if (!exclusion_msg) {
215 goto end;
216 }
217
218 at = strcpy(exclusion_msg, exclusion_fmt) + exclusion_fmt_len;
219 for (i = 0; i < exclusion_count; ++i) {
220 const char *name;
221
222 /* Append comma between exclusion names */
223 if (i > 0) {
224 *at = ',';
225 at++;
226 }
227
228 ret = lttng_event_get_exclusion_name(event, i, &name);
229 if (ret) {
230 /* Prints '?' on local error; should never happen */
231 *at = '?';
232 at++;
233 continue;
234 }
235
236 /* Append exclusion name */
237 at += sprintf(at, "%s", name);
238 }
239
240 /* This also puts a final '\0' at the end of exclusion_msg */
241 strcpy(at, "]");
242
243 end:
244 return exclusion_msg;
245 }
246
247 static void print_userspace_probe_location(struct lttng_event *event)
248 {
249 const struct lttng_userspace_probe_location *location;
250 const struct lttng_userspace_probe_location_lookup_method *lookup_method;
251 enum lttng_userspace_probe_location_lookup_method_type lookup_type;
252
253 location = lttng_event_get_userspace_probe_location(event);
254 if (!location) {
255 MSG("Event has no userspace probe location");
256 return;
257 }
258
259 lookup_method = lttng_userspace_probe_location_get_lookup_method(location);
260 if (!lookup_method) {
261 MSG("Event has no userspace probe location lookup method");
262 return;
263 }
264
265 MSG("%s%s (type: userspace-probe)%s", indent6, event->name, enabled_string(event->enabled));
266
267 lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method);
268
269 switch (lttng_userspace_probe_location_get_type(location)) {
270 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN:
271 MSG("%sType: Unknown", indent8);
272 break;
273 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
274 {
275 const char *function_name;
276 char *binary_path;
277
278 MSG("%sType: Function", indent8);
279 function_name = lttng_userspace_probe_location_function_get_function_name(location);
280 binary_path = realpath(lttng_userspace_probe_location_function_get_binary_path(location), NULL);
281
282 MSG("%sBinary path: %s", indent8, binary_path ? binary_path : "NULL");
283 MSG("%sFunction: %s()", indent8, function_name ? function_name : "NULL");
284 switch (lookup_type) {
285 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
286 MSG("%sLookup method: ELF", indent8);
287 break;
288 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
289 MSG("%sLookup method: default", indent8);
290 break;
291 default:
292 MSG("%sLookup method: INVALID LOOKUP TYPE ENCOUNTERED", indent8);
293 break;
294 }
295
296 free(binary_path);
297 break;
298 }
299 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
300 {
301 const char *probe_name, *provider_name;
302 char *binary_path;
303
304 MSG("%sType: Tracepoint", indent8);
305 probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location);
306 provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location);
307 binary_path = realpath(lttng_userspace_probe_location_tracepoint_get_binary_path(location), NULL);
308 MSG("%sBinary path: %s", indent8, binary_path ? binary_path : "NULL");
309 MSG("%sTracepoint: %s:%s", indent8, provider_name ? provider_name : "NULL", probe_name ? probe_name : "NULL");
310 switch (lookup_type) {
311 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
312 MSG("%sLookup method: SDT", indent8);
313 break;
314 default:
315 MSG("%sLookup method: INVALID LOOKUP TYPE ENCOUNTERED", indent8);
316 break;
317 }
318
319 free(binary_path);
320 break;
321 }
322 default:
323 ERR("Invalid probe type encountered");
324 }
325 }
326
327 /*
328 * Pretty print single event.
329 */
330 static void print_events(struct lttng_event *event)
331 {
332 int ret;
333 const char *filter_str;
334 char *filter_msg = NULL;
335 char *exclusion_msg = NULL;
336
337 ret = lttng_event_get_filter_expression(event, &filter_str);
338
339 if (ret) {
340 filter_msg = strdup(" [failed to retrieve filter]");
341 } else if (filter_str) {
342 const char * const filter_fmt = " [filter: '%s']";
343
344 filter_msg = malloc(strlen(filter_str) +
345 strlen(filter_fmt) + 1);
346 if (filter_msg) {
347 sprintf(filter_msg, filter_fmt,
348 filter_str);
349 }
350 }
351
352 exclusion_msg = get_exclusion_names_msg(event);
353 if (!exclusion_msg) {
354 exclusion_msg = strdup(" [failed to retrieve exclusions]");
355 }
356
357 switch (event->type) {
358 case LTTNG_EVENT_TRACEPOINT:
359 {
360 if (event->loglevel != -1) {
361 MSG("%s%s (loglevel%s %s (%d)) (type: tracepoint)%s%s%s",
362 indent6,
363 event->name,
364 logleveltype_string(event->loglevel_type),
365 mi_lttng_loglevel_string(event->loglevel, handle->domain.type),
366 event->loglevel,
367 enabled_string(event->enabled),
368 safe_string(exclusion_msg),
369 safe_string(filter_msg));
370 } else {
371 MSG("%s%s (type: tracepoint)%s%s%s",
372 indent6,
373 event->name,
374 enabled_string(event->enabled),
375 safe_string(exclusion_msg),
376 safe_string(filter_msg));
377 }
378 break;
379 }
380 case LTTNG_EVENT_FUNCTION:
381 MSG("%s%s (type: function)%s%s", indent6,
382 event->name, enabled_string(event->enabled),
383 safe_string(filter_msg));
384 if (event->attr.probe.addr != 0) {
385 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
386 } else {
387 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
388 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
389 }
390 break;
391 case LTTNG_EVENT_PROBE:
392 MSG("%s%s (type: probe)%s%s", indent6,
393 event->name, enabled_string(event->enabled),
394 safe_string(filter_msg));
395 if (event->attr.probe.addr != 0) {
396 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
397 } else {
398 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
399 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
400 }
401 break;
402 case LTTNG_EVENT_USERSPACE_PROBE:
403 print_userspace_probe_location(event);
404 break;
405 case LTTNG_EVENT_FUNCTION_ENTRY:
406 MSG("%s%s (type: function)%s%s", indent6,
407 event->name, enabled_string(event->enabled),
408 safe_string(filter_msg));
409 MSG("%ssymbol: \"%s\"", indent8, event->attr.ftrace.symbol_name);
410 break;
411 case LTTNG_EVENT_SYSCALL:
412 MSG("%s%s%s%s%s%s", indent6, event->name,
413 (opt_syscall ? "" : " (type:syscall)"),
414 enabled_string(event->enabled),
415 bitness_event(event->flags),
416 safe_string(filter_msg));
417 break;
418 case LTTNG_EVENT_NOOP:
419 MSG("%s (type: noop)%s%s", indent6,
420 enabled_string(event->enabled),
421 safe_string(filter_msg));
422 break;
423 case LTTNG_EVENT_ALL:
424 /* Fall-through. */
425 default:
426 /* We should never have "all" events in list. */
427 assert(0);
428 break;
429 }
430
431 free(filter_msg);
432 free(exclusion_msg);
433 }
434
435 static const char *field_type(struct lttng_event_field *field)
436 {
437 switch(field->type) {
438 case LTTNG_EVENT_FIELD_INTEGER:
439 return "integer";
440 case LTTNG_EVENT_FIELD_ENUM:
441 return "enum";
442 case LTTNG_EVENT_FIELD_FLOAT:
443 return "float";
444 case LTTNG_EVENT_FIELD_STRING:
445 return "string";
446 case LTTNG_EVENT_FIELD_OTHER:
447 default: /* fall-through */
448 return "unknown";
449 }
450 }
451
452 /*
453 * Pretty print single event fields.
454 */
455 static void print_event_field(struct lttng_event_field *field)
456 {
457 if (!field->field_name[0]) {
458 return;
459 }
460 MSG("%sfield: %s (%s)%s", indent8, field->field_name,
461 field_type(field), field->nowrite ? " [no write]" : "");
462 }
463
464 /*
465 * Machine interface
466 * Jul and ust event listing
467 */
468 static int mi_list_agent_ust_events(struct lttng_event *events, int count,
469 struct lttng_domain *domain)
470 {
471 int ret, i;
472 pid_t cur_pid = 0;
473 char *cmdline = NULL;
474 int pid_element_open = 0;
475
476 /* Open domains element */
477 ret = mi_lttng_domains_open(writer);
478 if (ret) {
479 goto end;
480 }
481
482 /* Write domain */
483 ret = mi_lttng_domain(writer, domain, 1);
484 if (ret) {
485 goto end;
486 }
487
488 /* Open pids element element */
489 ret = mi_lttng_pids_open(writer);
490 if (ret) {
491 goto end;
492 }
493
494 for (i = 0; i < count; i++) {
495 if (cur_pid != events[i].pid) {
496 if (pid_element_open) {
497 /* Close the previous events and pid element */
498 ret = mi_lttng_close_multi_element(writer, 2);
499 if (ret) {
500 goto end;
501 }
502 pid_element_open = 0;
503 }
504
505 cur_pid = events[i].pid;
506 cmdline = get_cmdline_by_pid(cur_pid);
507 if (!cmdline) {
508 ret = CMD_ERROR;
509 goto end;
510 }
511
512 if (!pid_element_open) {
513 /* Open and write a pid element */
514 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
515 if (ret) {
516 goto error;
517 }
518
519 /* Open events element */
520 ret = mi_lttng_events_open(writer);
521 if (ret) {
522 goto error;
523 }
524
525 pid_element_open = 1;
526 }
527 free(cmdline);
528 }
529
530 /* Write an event */
531 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
532 if (ret) {
533 goto end;
534 }
535 }
536
537 /* Close pids */
538 ret = mi_lttng_writer_close_element(writer);
539 if (ret) {
540 goto end;
541 }
542
543 /* Close domain, domains */
544 ret = mi_lttng_close_multi_element(writer, 2);
545 end:
546 return ret;
547 error:
548 free(cmdline);
549 return ret;
550 }
551
552 static int list_agent_events(void)
553 {
554 int i, size, ret = CMD_SUCCESS;
555 struct lttng_domain domain;
556 struct lttng_handle *handle = NULL;
557 struct lttng_event *event_list = NULL;
558 pid_t cur_pid = 0;
559 char *cmdline = NULL;
560 const char *agent_domain_str;
561
562 memset(&domain, 0, sizeof(domain));
563 if (opt_jul) {
564 domain.type = LTTNG_DOMAIN_JUL;
565 } else if (opt_log4j) {
566 domain.type = LTTNG_DOMAIN_LOG4J;
567 } else if (opt_python) {
568 domain.type = LTTNG_DOMAIN_PYTHON;
569 } else {
570 ERR("Invalid agent domain selected.");
571 ret = CMD_ERROR;
572 goto error;
573 }
574
575 agent_domain_str = get_domain_str(domain.type);
576
577 DBG("Getting %s tracing events", agent_domain_str);
578
579 handle = lttng_create_handle(NULL, &domain);
580 if (handle == NULL) {
581 ret = CMD_ERROR;
582 goto end;
583 }
584
585 size = lttng_list_tracepoints(handle, &event_list);
586 if (size < 0) {
587 ERR("Unable to list %s events: %s", agent_domain_str,
588 lttng_strerror(size));
589 ret = CMD_ERROR;
590 goto end;
591 }
592
593 if (lttng_opt_mi) {
594 /* Mi print */
595 ret = mi_list_agent_ust_events(event_list, size, &domain);
596 if (ret) {
597 ret = CMD_ERROR;
598 goto error;
599 }
600 } else {
601 /* Pretty print */
602 MSG("%s events (Logger name):\n-------------------------",
603 agent_domain_str);
604
605 if (size == 0) {
606 MSG("None");
607 }
608
609 for (i = 0; i < size; i++) {
610 if (cur_pid != event_list[i].pid) {
611 cur_pid = event_list[i].pid;
612 cmdline = get_cmdline_by_pid(cur_pid);
613 if (cmdline == NULL) {
614 ret = CMD_ERROR;
615 goto error;
616 }
617 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
618 free(cmdline);
619 }
620 MSG("%s- %s", indent6, event_list[i].name);
621 }
622
623 MSG("");
624 }
625
626 error:
627 free(event_list);
628 end:
629 lttng_destroy_handle(handle);
630 return ret;
631 }
632
633 /*
634 * Ask session daemon for all user space tracepoints available.
635 */
636 static int list_ust_events(void)
637 {
638 int i, size, ret = CMD_SUCCESS;
639 struct lttng_domain domain;
640 struct lttng_handle *handle;
641 struct lttng_event *event_list = NULL;
642 pid_t cur_pid = 0;
643 char *cmdline = NULL;
644
645 memset(&domain, 0, sizeof(domain));
646
647 DBG("Getting UST tracing events");
648
649 domain.type = LTTNG_DOMAIN_UST;
650
651 handle = lttng_create_handle(NULL, &domain);
652 if (handle == NULL) {
653 ret = CMD_ERROR;
654 goto end;
655 }
656
657 size = lttng_list_tracepoints(handle, &event_list);
658 if (size < 0) {
659 ERR("Unable to list UST events: %s", lttng_strerror(size));
660 ret = CMD_ERROR;
661 goto error;
662 }
663
664 if (lttng_opt_mi) {
665 /* Mi print */
666 ret = mi_list_agent_ust_events(event_list, size, &domain);
667 } else {
668 /* Pretty print */
669 MSG("UST events:\n-------------");
670
671 if (size == 0) {
672 MSG("None");
673 }
674
675 for (i = 0; i < size; i++) {
676 if (cur_pid != event_list[i].pid) {
677 cur_pid = event_list[i].pid;
678 cmdline = get_cmdline_by_pid(cur_pid);
679 if (cmdline == NULL) {
680 ret = CMD_ERROR;
681 goto error;
682 }
683 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
684 free(cmdline);
685 }
686 print_events(&event_list[i]);
687 }
688
689 MSG("");
690 }
691
692 error:
693 free(event_list);
694 end:
695 lttng_destroy_handle(handle);
696 return ret;
697 }
698
699 /*
700 * Machine interface
701 * List all ust event with their fields
702 */
703 static int mi_list_ust_event_fields(struct lttng_event_field *fields, int count,
704 struct lttng_domain *domain)
705 {
706 int ret, i;
707 pid_t cur_pid = 0;
708 char *cmdline = NULL;
709 int pid_element_open = 0;
710 int event_element_open = 0;
711 struct lttng_event cur_event;
712
713 memset(&cur_event, 0, sizeof(cur_event));
714
715 /* Open domains element */
716 ret = mi_lttng_domains_open(writer);
717 if (ret) {
718 goto end;
719 }
720
721 /* Write domain */
722 ret = mi_lttng_domain(writer, domain, 1);
723 if (ret) {
724 goto end;
725 }
726
727 /* Open pids element */
728 ret = mi_lttng_pids_open(writer);
729 if (ret) {
730 goto end;
731 }
732
733 for (i = 0; i < count; i++) {
734 if (cur_pid != fields[i].event.pid) {
735 if (pid_element_open) {
736 if (event_element_open) {
737 /* Close the previous field element and event. */
738 ret = mi_lttng_close_multi_element(writer, 2);
739 if (ret) {
740 goto end;
741 }
742 event_element_open = 0;
743 }
744 /* Close the previous events, pid element */
745 ret = mi_lttng_close_multi_element(writer, 2);
746 if (ret) {
747 goto end;
748 }
749 pid_element_open = 0;
750 }
751
752 cur_pid = fields[i].event.pid;
753 cmdline = get_cmdline_by_pid(cur_pid);
754 if (!pid_element_open) {
755 /* Open and write a pid element */
756 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
757 if (ret) {
758 goto error;
759 }
760
761 /* Open events element */
762 ret = mi_lttng_events_open(writer);
763 if (ret) {
764 goto error;
765 }
766 pid_element_open = 1;
767 }
768 free(cmdline);
769 /* Wipe current event since we are about to print a new PID. */
770 memset(&cur_event, 0, sizeof(cur_event));
771 }
772
773 if (strcmp(cur_event.name, fields[i].event.name) != 0) {
774 if (event_element_open) {
775 /* Close the previous fields element and the previous event */
776 ret = mi_lttng_close_multi_element(writer, 2);
777 if (ret) {
778 goto end;
779 }
780 event_element_open = 0;
781 }
782
783 memcpy(&cur_event, &fields[i].event,
784 sizeof(cur_event));
785
786 if (!event_element_open) {
787 /* Open and write the event */
788 ret = mi_lttng_event(writer, &cur_event, 1,
789 handle->domain.type);
790 if (ret) {
791 goto end;
792 }
793
794 /* Open a fields element */
795 ret = mi_lttng_event_fields_open(writer);
796 if (ret) {
797 goto end;
798 }
799 event_element_open = 1;
800 }
801 }
802
803 /* Print the event_field */
804 ret = mi_lttng_event_field(writer, &fields[i]);
805 if (ret) {
806 goto end;
807 }
808 }
809
810 /* Close pids, domain, domains */
811 ret = mi_lttng_close_multi_element(writer, 3);
812 end:
813 return ret;
814 error:
815 free(cmdline);
816 return ret;
817 }
818
819 /*
820 * Ask session daemon for all user space tracepoint fields available.
821 */
822 static int list_ust_event_fields(void)
823 {
824 int i, size, ret = CMD_SUCCESS;
825 struct lttng_domain domain;
826 struct lttng_handle *handle;
827 struct lttng_event_field *event_field_list;
828 pid_t cur_pid = 0;
829 char *cmdline = NULL;
830
831 struct lttng_event cur_event;
832
833 memset(&domain, 0, sizeof(domain));
834 memset(&cur_event, 0, sizeof(cur_event));
835
836 DBG("Getting UST tracing event fields");
837
838 domain.type = LTTNG_DOMAIN_UST;
839
840 handle = lttng_create_handle(NULL, &domain);
841 if (handle == NULL) {
842 ret = CMD_ERROR;
843 goto end;
844 }
845
846 size = lttng_list_tracepoint_fields(handle, &event_field_list);
847 if (size < 0) {
848 ERR("Unable to list UST event fields: %s", lttng_strerror(size));
849 ret = CMD_ERROR;
850 goto end;
851 }
852
853 if (lttng_opt_mi) {
854 /* Mi print */
855 ret = mi_list_ust_event_fields(event_field_list, size, &domain);
856 if (ret) {
857 ret = CMD_ERROR;
858 goto error;
859 }
860 } else {
861 /* Pretty print */
862 MSG("UST events:\n-------------");
863
864 if (size == 0) {
865 MSG("None");
866 }
867
868 for (i = 0; i < size; i++) {
869 if (cur_pid != event_field_list[i].event.pid) {
870 cur_pid = event_field_list[i].event.pid;
871 cmdline = get_cmdline_by_pid(cur_pid);
872 if (cmdline == NULL) {
873 ret = CMD_ERROR;
874 goto error;
875 }
876 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
877 free(cmdline);
878 /* Wipe current event since we are about to print a new PID. */
879 memset(&cur_event, 0, sizeof(cur_event));
880 }
881 if (strcmp(cur_event.name, event_field_list[i].event.name) != 0) {
882 print_events(&event_field_list[i].event);
883 memcpy(&cur_event, &event_field_list[i].event,
884 sizeof(cur_event));
885 }
886 print_event_field(&event_field_list[i]);
887 }
888
889 MSG("");
890 }
891
892 error:
893 free(event_field_list);
894 end:
895 lttng_destroy_handle(handle);
896 return ret;
897 }
898
899 /*
900 * Machine interface
901 * Print a list of kernel events
902 */
903 static int mi_list_kernel_events(struct lttng_event *events, int count,
904 struct lttng_domain *domain)
905 {
906 int ret, i;
907
908 /* Open domains element */
909 ret = mi_lttng_domains_open(writer);
910 if (ret) {
911 goto end;
912 }
913
914 /* Write domain */
915 ret = mi_lttng_domain(writer, domain, 1);
916 if (ret) {
917 goto end;
918 }
919
920 /* Open events */
921 ret = mi_lttng_events_open(writer);
922 if (ret) {
923 goto end;
924 }
925
926 for (i = 0; i < count; i++) {
927 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
928 if (ret) {
929 goto end;
930 }
931 }
932
933 /* close events, domain and domains */
934 ret = mi_lttng_close_multi_element(writer, 3);
935 if (ret) {
936 goto end;
937 }
938
939 end:
940 return ret;
941 }
942
943 /*
944 * Ask for all trace events in the kernel
945 */
946 static int list_kernel_events(void)
947 {
948 int i, size, ret = CMD_SUCCESS;
949 struct lttng_domain domain;
950 struct lttng_handle *handle;
951 struct lttng_event *event_list;
952
953 memset(&domain, 0, sizeof(domain));
954
955 DBG("Getting kernel tracing events");
956
957 domain.type = LTTNG_DOMAIN_KERNEL;
958
959 handle = lttng_create_handle(NULL, &domain);
960 if (handle == NULL) {
961 ret = CMD_ERROR;
962 goto error;
963 }
964
965 size = lttng_list_tracepoints(handle, &event_list);
966 if (size < 0) {
967 ERR("Unable to list kernel events: %s", lttng_strerror(size));
968 lttng_destroy_handle(handle);
969 return CMD_ERROR;
970 }
971
972 if (lttng_opt_mi) {
973 /* Mi print */
974 ret = mi_list_kernel_events(event_list, size, &domain);
975 if (ret) {
976 ret = CMD_ERROR;
977 goto end;
978 }
979 } else {
980 MSG("Kernel events:\n-------------");
981
982 for (i = 0; i < size; i++) {
983 print_events(&event_list[i]);
984 }
985
986 MSG("");
987 }
988
989 end:
990 free(event_list);
991
992 lttng_destroy_handle(handle);
993 return ret;
994
995 error:
996 lttng_destroy_handle(handle);
997 return ret;
998 }
999
1000 /*
1001 * Machine interface
1002 * Print a list of system calls.
1003 */
1004 static int mi_list_syscalls(struct lttng_event *events, int count)
1005 {
1006 int ret, i;
1007
1008 /* Open events */
1009 ret = mi_lttng_events_open(writer);
1010 if (ret) {
1011 goto end;
1012 }
1013
1014 for (i = 0; i < count; i++) {
1015 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1016 if (ret) {
1017 goto end;
1018 }
1019 }
1020
1021 /* Close events. */
1022 ret = mi_lttng_writer_close_element(writer);
1023 if (ret) {
1024 goto end;
1025 }
1026
1027 end:
1028 return ret;
1029 }
1030
1031 /*
1032 * Ask for kernel system calls.
1033 */
1034 static int list_syscalls(void)
1035 {
1036 int i, size, ret = CMD_SUCCESS;
1037 struct lttng_event *event_list;
1038
1039 DBG("Getting kernel system call events");
1040
1041 size = lttng_list_syscalls(&event_list);
1042 if (size < 0) {
1043 ERR("Unable to list system calls: %s", lttng_strerror(size));
1044 ret = CMD_ERROR;
1045 goto error;
1046 }
1047
1048 if (lttng_opt_mi) {
1049 /* Mi print */
1050 ret = mi_list_syscalls(event_list, size);
1051 if (ret) {
1052 ret = CMD_ERROR;
1053 goto end;
1054 }
1055 } else {
1056 MSG("System calls:\n-------------");
1057
1058 for (i = 0; i < size; i++) {
1059 print_events(&event_list[i]);
1060 }
1061
1062 MSG("");
1063 }
1064
1065 end:
1066 free(event_list);
1067 return ret;
1068
1069 error:
1070 return ret;
1071 }
1072
1073 /*
1074 * Machine Interface
1075 * Print a list of agent events
1076 */
1077 static int mi_list_session_agent_events(struct lttng_event *events, int count)
1078 {
1079 int ret, i;
1080
1081 /* Open events element */
1082 ret = mi_lttng_events_open(writer);
1083 if (ret) {
1084 goto end;
1085 }
1086
1087 for (i = 0; i < count; i++) {
1088 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1089 if (ret) {
1090 goto end;
1091 }
1092 }
1093
1094 /* Close events element */
1095 ret = mi_lttng_writer_close_element(writer);
1096
1097 end:
1098 return ret;
1099 }
1100
1101 /*
1102 * List agent events for a specific session using the handle.
1103 *
1104 * Return CMD_SUCCESS on success else a negative value.
1105 */
1106 static int list_session_agent_events(void)
1107 {
1108 int ret = CMD_SUCCESS, count, i;
1109 struct lttng_event *events = NULL;
1110
1111 count = lttng_list_events(handle, "", &events);
1112 if (count < 0) {
1113 ret = CMD_ERROR;
1114 ERR("%s", lttng_strerror(count));
1115 goto error;
1116 }
1117
1118 if (lttng_opt_mi) {
1119 /* Mi print */
1120 ret = mi_list_session_agent_events(events, count);
1121 if (ret) {
1122 ret = CMD_ERROR;
1123 goto end;
1124 }
1125 } else {
1126 /* Pretty print */
1127 MSG("Events (Logger name):\n---------------------");
1128 if (count == 0) {
1129 MSG("%sNone\n", indent6);
1130 goto end;
1131 }
1132
1133 for (i = 0; i < count; i++) {
1134 const char *filter_str;
1135 char *filter_msg = NULL;
1136 struct lttng_event *event = &events[i];
1137
1138 ret = lttng_event_get_filter_expression(event,
1139 &filter_str);
1140 if (ret) {
1141 filter_msg = strdup(" [failed to retrieve filter]");
1142 } else if (filter_str) {
1143 const char * const filter_fmt =
1144 " [filter: '%s']";
1145
1146 filter_msg = malloc(strlen(filter_str) +
1147 strlen(filter_fmt) + 1);
1148 if (filter_msg) {
1149 sprintf(filter_msg, filter_fmt,
1150 filter_str);
1151 }
1152 }
1153
1154 if (event->loglevel_type !=
1155 LTTNG_EVENT_LOGLEVEL_ALL) {
1156 MSG("%s- %s%s (loglevel%s %s)%s", indent4,
1157 event->name,
1158 enabled_string(event->enabled),
1159 logleveltype_string(
1160 event->loglevel_type),
1161 mi_lttng_loglevel_string(
1162 event->loglevel,
1163 handle->domain.type),
1164 safe_string(filter_msg));
1165 } else {
1166 MSG("%s- %s%s%s", indent4, event->name,
1167 enabled_string(event->enabled),
1168 safe_string(filter_msg));
1169 }
1170 free(filter_msg);
1171 }
1172
1173 MSG("");
1174 }
1175
1176 end:
1177 free(events);
1178 error:
1179 return ret;
1180 }
1181
1182 /*
1183 * Machine interface
1184 * print a list of event
1185 */
1186 static int mi_list_events(struct lttng_event *events, int count)
1187 {
1188 int ret, i;
1189
1190 /* Open events element */
1191 ret = mi_lttng_events_open(writer);
1192 if (ret) {
1193 goto end;
1194 }
1195
1196 for (i = 0; i < count; i++) {
1197 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1198 if (ret) {
1199 goto end;
1200 }
1201 }
1202
1203 /* Close events element */
1204 ret = mi_lttng_writer_close_element(writer);
1205
1206 end:
1207 return ret;
1208 }
1209
1210 /*
1211 * List events of channel of session and domain.
1212 */
1213 static int list_events(const char *channel_name)
1214 {
1215 int ret = CMD_SUCCESS, count, i;
1216 struct lttng_event *events = NULL;
1217
1218 count = lttng_list_events(handle, channel_name, &events);
1219 if (count < 0) {
1220 ret = CMD_ERROR;
1221 ERR("%s", lttng_strerror(count));
1222 goto error;
1223 }
1224
1225 if (lttng_opt_mi) {
1226 /* Mi print */
1227 ret = mi_list_events(events, count);
1228 if (ret) {
1229 ret = CMD_ERROR;
1230 goto end;
1231 }
1232 } else {
1233 /* Pretty print */
1234 MSG("\n%sEvent rules:", indent4);
1235 if (count == 0) {
1236 MSG("%sNone\n", indent6);
1237 goto end;
1238 }
1239
1240 for (i = 0; i < count; i++) {
1241 print_events(&events[i]);
1242 }
1243
1244 MSG("");
1245 }
1246 end:
1247 free(events);
1248 error:
1249 return ret;
1250 }
1251
1252 static
1253 void print_timer(const char *timer_name, uint32_t space_count, int64_t value)
1254 {
1255 uint32_t i;
1256
1257 _MSG("%s%s:", indent6, timer_name);
1258 for (i = 0; i < space_count; i++) {
1259 _MSG(" ");
1260 }
1261
1262 if (value) {
1263 MSG("%" PRId64 " %s", value, USEC_UNIT);
1264 } else {
1265 MSG("inactive");
1266 }
1267 }
1268
1269 /*
1270 * Pretty print channel
1271 */
1272 static void print_channel(struct lttng_channel *channel)
1273 {
1274 int ret;
1275 uint64_t discarded_events, lost_packets, monitor_timer_interval;
1276 int64_t blocking_timeout;
1277
1278 ret = lttng_channel_get_discarded_event_count(channel,
1279 &discarded_events);
1280 if (ret) {
1281 ERR("Failed to retrieve discarded event count of channel");
1282 return;
1283 }
1284
1285 ret = lttng_channel_get_lost_packet_count(channel,
1286 &lost_packets);
1287 if (ret) {
1288 ERR("Failed to retrieve lost packet count of channel");
1289 return;
1290 }
1291
1292 ret = lttng_channel_get_monitor_timer_interval(channel,
1293 &monitor_timer_interval);
1294 if (ret) {
1295 ERR("Failed to retrieve monitor interval of channel");
1296 return;
1297 }
1298
1299 ret = lttng_channel_get_blocking_timeout(channel,
1300 &blocking_timeout);
1301 if (ret) {
1302 ERR("Failed to retrieve blocking timeout of channel");
1303 return;
1304 }
1305
1306 MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled));
1307 MSG("%sAttributes:", indent4);
1308 MSG("%sEvent-loss mode: %s", indent6, channel->attr.overwrite ? "overwrite" : "discard");
1309 MSG("%sSub-buffer size: %" PRIu64 " bytes", indent6, channel->attr.subbuf_size);
1310 MSG("%sSub-buffer count: %" PRIu64, indent6, channel->attr.num_subbuf);
1311
1312 print_timer("Switch timer", 5, channel->attr.switch_timer_interval);
1313 print_timer("Read timer", 7, channel->attr.read_timer_interval);
1314 print_timer("Monitor timer", 4, monitor_timer_interval);
1315
1316 if (!channel->attr.overwrite) {
1317 if (blocking_timeout == -1) {
1318 MSG("%sBlocking timeout: infinite", indent6);
1319 } else {
1320 MSG("%sBlocking timeout: %" PRId64 " %s", indent6,
1321 blocking_timeout, USEC_UNIT);
1322 }
1323 }
1324
1325 MSG("%sTrace file count: %" PRIu64 " per stream", indent6,
1326 channel->attr.tracefile_count == 0 ?
1327 1 : channel->attr.tracefile_count);
1328 if (channel->attr.tracefile_size != 0 ) {
1329 MSG("%sTrace file size: %" PRIu64 " bytes", indent6,
1330 channel->attr.tracefile_size);
1331 } else {
1332 MSG("%sTrace file size: %s", indent6, "unlimited");
1333 }
1334 switch (channel->attr.output) {
1335 case LTTNG_EVENT_SPLICE:
1336 MSG("%sOutput mode: splice", indent6);
1337 break;
1338 case LTTNG_EVENT_MMAP:
1339 MSG("%sOutput mode: mmap", indent6);
1340 break;
1341 }
1342
1343 MSG("\n%sStatistics:", indent4);
1344 if (listed_session.snapshot_mode) {
1345 /*
1346 * The lost packet count is omitted for sessions in snapshot
1347 * mode as it is misleading: it would indicate the number of
1348 * packets that the consumer could not extract during the
1349 * course of recording the snapshot. It does not have the
1350 * same meaning as the "regular" lost packet count that
1351 * would result from the consumer not keeping up with
1352 * event production in an overwrite-mode channel.
1353 *
1354 * A more interesting statistic would be the number of
1355 * packets lost between the first and last extracted
1356 * packets of a given snapshot (which prevents most analyses).
1357 */
1358 MSG("%sNone", indent6);
1359 goto skip_stats_printing;
1360 }
1361
1362 if (!channel->attr.overwrite) {
1363 MSG("%sDiscarded events: %" PRIu64, indent6, discarded_events);
1364 } else {
1365 MSG("%sLost packets: %" PRIu64, indent6, lost_packets);
1366 }
1367 skip_stats_printing:
1368 return;
1369 }
1370
1371 /*
1372 * Machine interface
1373 * Print a list of channel
1374 *
1375 */
1376 static int mi_list_channels(struct lttng_channel *channels, int count,
1377 const char *channel_name)
1378 {
1379 int i, ret;
1380 unsigned int chan_found = 0;
1381
1382 /* Open channels element */
1383 ret = mi_lttng_channels_open(writer);
1384 if (ret) {
1385 goto error;
1386 }
1387
1388 for (i = 0; i < count; i++) {
1389 if (channel_name != NULL) {
1390 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1391 chan_found = 1;
1392 } else {
1393 continue;
1394 }
1395 }
1396
1397 /* Write channel element and leave it open */
1398 ret = mi_lttng_channel(writer, &channels[i], 1);
1399 if (ret) {
1400 goto error;
1401 }
1402
1403 /* Listing events per channel */
1404 ret = list_events(channels[i].name);
1405 if (ret) {
1406 goto error;
1407 }
1408
1409 /* Closing the channel element we opened earlier */
1410 ret = mi_lttng_writer_close_element(writer);
1411 if (ret) {
1412 goto error;
1413 }
1414
1415 if (chan_found) {
1416 break;
1417 }
1418 }
1419
1420 /* Close channels element */
1421 ret = mi_lttng_writer_close_element(writer);
1422 if (ret) {
1423 goto error;
1424 }
1425
1426 error:
1427 return ret;
1428 }
1429
1430 /*
1431 * List channel(s) of session and domain.
1432 *
1433 * If channel_name is NULL, all channels are listed.
1434 */
1435 static int list_channels(const char *channel_name)
1436 {
1437 int count, i, ret = CMD_SUCCESS;
1438 unsigned int chan_found = 0;
1439 struct lttng_channel *channels = NULL;
1440
1441 DBG("Listing channel(s) (%s)", channel_name ? : "<all>");
1442
1443 count = lttng_list_channels(handle, &channels);
1444 if (count < 0) {
1445 switch (-count) {
1446 case LTTNG_ERR_KERN_CHAN_NOT_FOUND:
1447 if (lttng_opt_mi) {
1448 /* When printing mi this is not an error
1449 * but an empty channels element */
1450 count = 0;
1451 } else {
1452 ret = CMD_SUCCESS;
1453 goto error_channels;
1454 }
1455 break;
1456 default:
1457 /* We had a real error */
1458 ret = CMD_ERROR;
1459 ERR("%s", lttng_strerror(count));
1460 goto error_channels;
1461 break;
1462 }
1463 }
1464
1465 if (lttng_opt_mi) {
1466 /* Mi print */
1467 ret = mi_list_channels(channels, count, channel_name);
1468 if (ret) {
1469 ret = CMD_ERROR;
1470 goto error;
1471 }
1472 } else {
1473 /* Pretty print */
1474 if (count) {
1475 MSG("Channels:\n-------------");
1476 }
1477
1478 for (i = 0; i < count; i++) {
1479 if (channel_name != NULL) {
1480 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1481 chan_found = 1;
1482 } else {
1483 continue;
1484 }
1485 }
1486 print_channel(&channels[i]);
1487
1488 /* Listing events per channel */
1489 ret = list_events(channels[i].name);
1490 if (ret) {
1491 goto error;
1492 }
1493
1494 if (chan_found) {
1495 break;
1496 }
1497 }
1498
1499 if (!chan_found && channel_name != NULL) {
1500 ret = CMD_ERROR;
1501 ERR("Channel %s not found", channel_name);
1502 goto error;
1503 }
1504 }
1505 error:
1506 free(channels);
1507
1508 error_channels:
1509 return ret;
1510 }
1511
1512 static const char *get_capitalized_process_attr_str(enum lttng_process_attr process_attr)
1513 {
1514 switch (process_attr) {
1515 case LTTNG_PROCESS_ATTR_PROCESS_ID:
1516 return "Process ID";
1517 case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID:
1518 return "Virtual process ID";
1519 case LTTNG_PROCESS_ATTR_USER_ID:
1520 return "User ID";
1521 case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID:
1522 return "Virtual user ID";
1523 case LTTNG_PROCESS_ATTR_GROUP_ID:
1524 return "Group ID";
1525 case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID:
1526 return "Virtual group ID";
1527 default:
1528 return "Unknown";
1529 }
1530 return NULL;
1531 }
1532
1533 static int handle_process_attr_status(enum lttng_process_attr process_attr,
1534 enum lttng_process_attr_tracker_handle_status status)
1535 {
1536 int ret = CMD_SUCCESS;
1537
1538 switch (status) {
1539 case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_INVALID_TRACKING_POLICY:
1540 case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_OK:
1541 /* Carry on. */
1542 break;
1543 case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_COMMUNICATION_ERROR:
1544 ERR("Communication occurred while fetching %s tracker",
1545 lttng_process_attr_to_string(process_attr));
1546 ret = CMD_ERROR;
1547 break;
1548 case LTTNG_PROCESS_ATTR_TRACKER_HANDLE_STATUS_SESSION_DOES_NOT_EXIST:
1549 ERR("Failed to get the inclusion set of the %s tracker: session `%s` no longer exists",
1550 lttng_process_attr_to_string(process_attr),
1551 handle->session_name);
1552 ret = CMD_ERROR;
1553 break;
1554 default:
1555 ERR("Unknown error occurred while fetching the inclusion set of the %s tracker",
1556 lttng_process_attr_to_string(process_attr));
1557 ret = CMD_ERROR;
1558 break;
1559 }
1560
1561 return ret;
1562 }
1563
1564 static int mi_output_empty_tracker(enum lttng_process_attr process_attr)
1565 {
1566 int ret;
1567
1568 ret = mi_lttng_process_attribute_tracker_open(writer, process_attr);
1569 if (ret) {
1570 goto end;
1571 }
1572
1573 ret = mi_lttng_close_multi_element(writer, 2);
1574 end:
1575 return ret;
1576 }
1577
1578 static inline bool is_value_type_name(
1579 enum lttng_process_attr_value_type value_type)
1580 {
1581 return value_type == LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME ||
1582 value_type == LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME;
1583 }
1584
1585 /*
1586 * List a process attribute tracker for a session and domain tuple.
1587 */
1588 static int list_process_attr_tracker(enum lttng_process_attr process_attr)
1589 {
1590 int ret = 0;
1591 unsigned int count, i;
1592 enum lttng_tracking_policy policy;
1593 enum lttng_error_code ret_code;
1594 enum lttng_process_attr_tracker_handle_status handle_status;
1595 enum lttng_process_attr_values_status values_status;
1596 const struct lttng_process_attr_values *values;
1597 struct lttng_process_attr_tracker_handle *tracker_handle = NULL;
1598
1599 ret_code = lttng_session_get_tracker_handle(handle->session_name,
1600 handle->domain.type, process_attr, &tracker_handle);
1601 if (ret_code != LTTNG_OK) {
1602 ERR("Failed to get process attribute tracker handle: %s",
1603 lttng_strerror(ret_code));
1604 ret = CMD_ERROR;
1605 goto end;
1606 }
1607
1608 handle_status = lttng_process_attr_tracker_handle_get_inclusion_set(
1609 tracker_handle, &values);
1610 ret = handle_process_attr_status(process_attr, handle_status);
1611 if (ret != CMD_SUCCESS) {
1612 goto end;
1613 }
1614
1615 handle_status = lttng_process_attr_tracker_handle_get_tracking_policy(
1616 tracker_handle, &policy);
1617 ret = handle_process_attr_status(process_attr, handle_status);
1618 if (ret != CMD_SUCCESS) {
1619 goto end;
1620 }
1621
1622 {
1623 char *process_attr_name;
1624 const int print_ret = asprintf(&process_attr_name, "%ss:",
1625 get_capitalized_process_attr_str(process_attr));
1626
1627 if (print_ret == -1) {
1628 ret = CMD_FATAL;
1629 goto end;
1630 }
1631 _MSG(" %-22s", process_attr_name);
1632 free(process_attr_name);
1633 }
1634 switch (policy) {
1635 case LTTNG_TRACKING_POLICY_INCLUDE_SET:
1636 break;
1637 case LTTNG_TRACKING_POLICY_EXCLUDE_ALL:
1638 if (writer) {
1639 mi_output_empty_tracker(process_attr);
1640 }
1641 MSG("none");
1642 ret = CMD_SUCCESS;
1643 goto end;
1644 case LTTNG_TRACKING_POLICY_INCLUDE_ALL:
1645 MSG("all");
1646 ret = CMD_SUCCESS;
1647 goto end;
1648 default:
1649 ERR("Unknown tracking policy encoutered while listing the %s process attribute tracker of session `%s`",
1650 lttng_process_attr_to_string(process_attr),
1651 handle->session_name);
1652 ret = CMD_FATAL;
1653 goto end;
1654 }
1655
1656 values_status = lttng_process_attr_values_get_count(values, &count);
1657 if (values_status != LTTNG_PROCESS_ATTR_VALUES_STATUS_OK) {
1658 ERR("Failed to get the count of values in the inclusion set of the %s process attribute tracker of session `%s`",
1659 lttng_process_attr_to_string(process_attr),
1660 handle->session_name);
1661 ret = CMD_FATAL;
1662 goto end;
1663 }
1664
1665 if (count == 0) {
1666 /* Functionally equivalent to the 'exclude all' policy. */
1667 if (writer) {
1668 mi_output_empty_tracker(process_attr);
1669 }
1670 MSG("none");
1671 ret = CMD_SUCCESS;
1672 goto end;
1673 }
1674
1675 /* Mi tracker_id element */
1676 if (writer) {
1677 /* Open tracker_id and targets elements */
1678 ret = mi_lttng_process_attribute_tracker_open(
1679 writer, process_attr);
1680 if (ret) {
1681 goto end;
1682 }
1683 }
1684
1685 for (i = 0; i < count; i++) {
1686 const enum lttng_process_attr_value_type value_type =
1687 lttng_process_attr_values_get_type_at_index(
1688 values, i);
1689 int64_t integral_value = INT64_MAX;
1690 const char *name = "error";
1691
1692 if (i >= 1) {
1693 _MSG(", ");
1694 }
1695 switch (value_type) {
1696 case LTTNG_PROCESS_ATTR_VALUE_TYPE_PID:
1697 {
1698 pid_t pid;
1699
1700 values_status = lttng_process_attr_values_get_pid_at_index(
1701 values, i, &pid);
1702 integral_value = (int64_t) pid;
1703 break;
1704 }
1705 case LTTNG_PROCESS_ATTR_VALUE_TYPE_UID:
1706 {
1707 uid_t uid;
1708
1709 values_status = lttng_process_attr_values_get_uid_at_index(
1710 values, i, &uid);
1711 integral_value = (int64_t) uid;
1712 break;
1713 }
1714 case LTTNG_PROCESS_ATTR_VALUE_TYPE_GID:
1715 {
1716 gid_t gid;
1717
1718 values_status = lttng_process_attr_values_get_gid_at_index(
1719 values, i, &gid);
1720 integral_value = (int64_t) gid;
1721 break;
1722 }
1723 case LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME:
1724 values_status = lttng_process_attr_values_get_user_name_at_index(
1725 values, i, &name);
1726 break;
1727 case LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME:
1728 values_status = lttng_process_attr_values_get_group_name_at_index(
1729 values, i, &name);
1730 break;
1731 default:
1732 ret = CMD_ERROR;
1733 goto end;
1734 }
1735
1736 if (values_status != LTTNG_PROCESS_ATTR_VALUES_STATUS_OK) {
1737 /*
1738 * Not possible given the current liblttng-ctl
1739 * implementation.
1740 */
1741 ERR("Unknown error occurred while fetching process attribute value in inclusion list");
1742 ret = CMD_FATAL;
1743 goto end;
1744 }
1745
1746 if (is_value_type_name(value_type)) {
1747 _MSG("`%s`", name);
1748 } else {
1749 _MSG("%" PRIi64, integral_value);
1750 }
1751
1752 /* Mi */
1753 if (writer) {
1754 ret = is_value_type_name(value_type) ?
1755 mi_lttng_string_process_attribute_value(
1756 writer,
1757 process_attr,
1758 name, false) :
1759 mi_lttng_integral_process_attribute_value(
1760 writer,
1761 process_attr,
1762 integral_value,
1763 false);
1764 if (ret) {
1765 goto end;
1766 }
1767 }
1768 }
1769 MSG("");
1770
1771 /* Mi close tracker_id and targets */
1772 if (writer) {
1773 ret = mi_lttng_close_multi_element(writer, 2);
1774 if (ret) {
1775 goto end;
1776 }
1777 }
1778 end:
1779 lttng_process_attr_tracker_handle_destroy(tracker_handle);
1780 return ret;
1781 }
1782
1783 /*
1784 * List all trackers of a domain
1785 */
1786 static int list_trackers(const struct lttng_domain *domain)
1787 {
1788 int ret = 0;
1789
1790 MSG("Tracked process attributes");
1791 /* Trackers listing */
1792 if (lttng_opt_mi) {
1793 ret = mi_lttng_trackers_open(writer);
1794 if (ret) {
1795 goto end;
1796 }
1797 }
1798
1799 switch (domain->type) {
1800 case LTTNG_DOMAIN_KERNEL:
1801 /* pid tracker */
1802 ret = list_process_attr_tracker(LTTNG_PROCESS_ATTR_PROCESS_ID);
1803 if (ret) {
1804 goto end;
1805 }
1806 /* vpid tracker */
1807 ret = list_process_attr_tracker(
1808 LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID);
1809 if (ret) {
1810 goto end;
1811 }
1812 /* uid tracker */
1813 ret = list_process_attr_tracker(LTTNG_PROCESS_ATTR_USER_ID);
1814 if (ret) {
1815 goto end;
1816 }
1817 /* vuid tracker */
1818 ret = list_process_attr_tracker(
1819 LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID);
1820 if (ret) {
1821 goto end;
1822 }
1823 /* gid tracker */
1824 ret = list_process_attr_tracker(LTTNG_PROCESS_ATTR_GROUP_ID);
1825 if (ret) {
1826 goto end;
1827 }
1828 /* vgid tracker */
1829 ret = list_process_attr_tracker(
1830 LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID);
1831 if (ret) {
1832 goto end;
1833 }
1834 break;
1835 case LTTNG_DOMAIN_UST:
1836 /* vpid tracker */
1837 ret = list_process_attr_tracker(
1838 LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID);
1839 if (ret) {
1840 goto end;
1841 }
1842 /* vuid tracker */
1843 ret = list_process_attr_tracker(
1844 LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID);
1845 if (ret) {
1846 goto end;
1847 }
1848 /* vgid tracker */
1849 ret = list_process_attr_tracker(
1850 LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID);
1851 if (ret) {
1852 goto end;
1853 }
1854 break;
1855 default:
1856 break;
1857 }
1858 MSG();
1859 if (lttng_opt_mi) {
1860 /* Close trackers element */
1861 ret = mi_lttng_writer_close_element(writer);
1862 if (ret) {
1863 goto end;
1864 }
1865 }
1866
1867 end:
1868 return ret;
1869 }
1870
1871 static enum cmd_error_code print_periodic_rotation_schedule(
1872 const struct lttng_rotation_schedule *schedule)
1873 {
1874 enum cmd_error_code ret;
1875 enum lttng_rotation_status status;
1876 uint64_t value;
1877
1878 status = lttng_rotation_schedule_periodic_get_period(schedule,
1879 &value);
1880 if (status != LTTNG_ROTATION_STATUS_OK) {
1881 ERR("Failed to retrieve period parameter from periodic rotation schedule.");
1882 ret = CMD_ERROR;
1883 goto end;
1884 }
1885
1886 MSG(" timer period: %" PRIu64" %s", value, USEC_UNIT);
1887 ret = CMD_SUCCESS;
1888 end:
1889 return ret;
1890 }
1891
1892 static enum cmd_error_code print_size_threshold_rotation_schedule(
1893 const struct lttng_rotation_schedule *schedule)
1894 {
1895 enum cmd_error_code ret;
1896 enum lttng_rotation_status status;
1897 uint64_t value;
1898
1899 status = lttng_rotation_schedule_size_threshold_get_threshold(schedule,
1900 &value);
1901 if (status != LTTNG_ROTATION_STATUS_OK) {
1902 ERR("Failed to retrieve size parameter from size-based rotation schedule.");
1903 ret = CMD_ERROR;
1904 goto end;
1905 }
1906
1907 MSG(" size threshold: %" PRIu64" bytes", value);
1908 ret = CMD_SUCCESS;
1909 end:
1910 return ret;
1911 }
1912
1913 static enum cmd_error_code print_rotation_schedule(
1914 const struct lttng_rotation_schedule *schedule)
1915 {
1916 enum cmd_error_code ret;
1917
1918 switch (lttng_rotation_schedule_get_type(schedule)) {
1919 case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD:
1920 ret = print_size_threshold_rotation_schedule(schedule);
1921 break;
1922 case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC:
1923 ret = print_periodic_rotation_schedule(schedule);
1924 break;
1925 default:
1926 ret = CMD_ERROR;
1927 }
1928 return ret;
1929 }
1930
1931 /*
1932 * List the automatic rotation settings.
1933 */
1934 static enum cmd_error_code list_rotate_settings(const char *session_name)
1935 {
1936 int ret;
1937 enum cmd_error_code cmd_ret = CMD_SUCCESS;
1938 unsigned int count, i;
1939 struct lttng_rotation_schedules *schedules = NULL;
1940 enum lttng_rotation_status status;
1941
1942 ret = lttng_session_list_rotation_schedules(session_name, &schedules);
1943 if (ret != LTTNG_OK) {
1944 ERR("Failed to list session rotation schedules: %s", lttng_strerror(ret));
1945 cmd_ret = CMD_ERROR;
1946 goto end;
1947 }
1948
1949 status = lttng_rotation_schedules_get_count(schedules, &count);
1950 if (status != LTTNG_ROTATION_STATUS_OK) {
1951 ERR("Failed to retrieve the number of session rotation schedules.");
1952 cmd_ret = CMD_ERROR;
1953 goto end;
1954 }
1955
1956 if (count == 0) {
1957 cmd_ret = CMD_SUCCESS;
1958 goto end;
1959 }
1960
1961 MSG("Automatic rotation schedules:");
1962 if (lttng_opt_mi) {
1963 ret = mi_lttng_writer_open_element(writer,
1964 mi_lttng_element_rotation_schedules);
1965 if (ret) {
1966 cmd_ret = CMD_ERROR;
1967 goto end;
1968 }
1969 }
1970
1971 for (i = 0; i < count; i++) {
1972 enum cmd_error_code tmp_ret = CMD_SUCCESS;
1973 const struct lttng_rotation_schedule *schedule;
1974
1975 schedule = lttng_rotation_schedules_get_at_index(schedules, i);
1976 if (!schedule) {
1977 ERR("Failed to retrieve session rotation schedule.");
1978 cmd_ret = CMD_ERROR;
1979 goto end;
1980 }
1981
1982 if (lttng_opt_mi) {
1983 ret = mi_lttng_rotation_schedule(writer, schedule);
1984 if (ret) {
1985 tmp_ret = CMD_ERROR;
1986 }
1987 } else {
1988 tmp_ret = print_rotation_schedule(schedule);
1989 }
1990
1991 /*
1992 * Report an error if the serialization of any of the
1993 * descriptors failed.
1994 */
1995 cmd_ret = cmd_ret ? cmd_ret : tmp_ret;
1996 }
1997
1998 _MSG("\n");
1999 if (lttng_opt_mi) {
2000 /* Close the rotation_schedules element. */
2001 ret = mi_lttng_writer_close_element(writer);
2002 if (ret) {
2003 cmd_ret = CMD_ERROR;
2004 goto end;
2005 }
2006 }
2007 end:
2008 lttng_rotation_schedules_destroy(schedules);
2009 return cmd_ret;
2010 }
2011
2012 /*
2013 * Machine interface
2014 * Find the session with session_name as name
2015 * and print his informations.
2016 */
2017 static int mi_list_session(const char *session_name,
2018 struct lttng_session *sessions, int count)
2019 {
2020 int ret, i;
2021 unsigned int session_found = 0;
2022
2023 if (session_name == NULL) {
2024 ret = -LTTNG_ERR_SESS_NOT_FOUND;
2025 goto end;
2026 }
2027
2028 for (i = 0; i < count; i++) {
2029 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
2030 /* We need to leave it open to append other informations
2031 * like domain, channel, events etc.*/
2032 session_found = 1;
2033 ret = mi_lttng_session(writer, &sessions[i], 1);
2034 if (ret) {
2035 goto end;
2036 }
2037 break;
2038 }
2039 }
2040
2041 if (!session_found) {
2042 ERR("Session '%s' not found", session_name);
2043 ret = -LTTNG_ERR_SESS_NOT_FOUND;
2044 goto end;
2045 }
2046
2047 end:
2048 return ret;
2049 }
2050
2051 /*
2052 * Machine interface
2053 * List all availables session
2054 */
2055 static int mi_list_sessions(struct lttng_session *sessions, int count)
2056 {
2057 int ret, i;
2058
2059 /* Opening sessions element */
2060 ret = mi_lttng_sessions_open(writer);
2061 if (ret) {
2062 goto end;
2063 }
2064
2065 /* Listing sessions */
2066 for (i = 0; i < count; i++) {
2067 ret = mi_lttng_session(writer, &sessions[i], 0);
2068 if (ret) {
2069 goto end;
2070 }
2071 }
2072
2073 /* Closing sessions element */
2074 ret = mi_lttng_writer_close_element(writer);
2075 if (ret) {
2076 goto end;
2077 }
2078
2079 end:
2080 return ret;
2081 }
2082
2083 /*
2084 * List available tracing session. List only basic information.
2085 *
2086 * If session_name is NULL, all sessions are listed.
2087 */
2088 static int list_sessions(const char *session_name)
2089 {
2090 int ret = CMD_SUCCESS;
2091 int count, i;
2092 unsigned int session_found = 0;
2093 struct lttng_session *sessions = NULL;
2094
2095 count = lttng_list_sessions(&sessions);
2096 DBG("Session count %d", count);
2097 if (count < 0) {
2098 ret = CMD_ERROR;
2099 ERR("%s", lttng_strerror(count));
2100 goto end;
2101 }
2102
2103 if (lttng_opt_mi) {
2104 /* Mi */
2105 if (session_name == NULL) {
2106 /* List all sessions */
2107 ret = mi_list_sessions(sessions, count);
2108 } else {
2109 /* Note : this return an open session element */
2110 ret = mi_list_session(session_name, sessions, count);
2111 }
2112 if (ret) {
2113 ret = CMD_ERROR;
2114 goto end;
2115 }
2116 } else {
2117 /* Pretty print */
2118 if (count == 0) {
2119 MSG("Currently no available tracing session");
2120 goto end;
2121 }
2122
2123 if (session_name == NULL) {
2124 MSG("Available tracing sessions:");
2125 }
2126
2127 for (i = 0; i < count; i++) {
2128 if (session_name != NULL) {
2129 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
2130 session_found = 1;
2131 MSG("Tracing session %s: [%s%s]", session_name,
2132 active_string(sessions[i].enabled),
2133 snapshot_string(sessions[i].snapshot_mode));
2134 if (*sessions[i].path) {
2135 MSG("%sTrace output: %s\n", indent4, sessions[i].path);
2136 }
2137 memcpy(&listed_session, &sessions[i],
2138 sizeof(listed_session));
2139 break;
2140 }
2141 } else {
2142 MSG(" %d) %s [%s%s]", i + 1,
2143 sessions[i].name,
2144 active_string(sessions[i].enabled),
2145 snapshot_string(sessions[i].snapshot_mode));
2146 if (*sessions[i].path) {
2147 MSG("%sTrace output: %s", indent4, sessions[i].path);
2148 }
2149 if (sessions[i].live_timer_interval != 0) {
2150 MSG("%sLive timer interval: %u %s", indent4,
2151 sessions[i].live_timer_interval,
2152 USEC_UNIT);
2153 }
2154 MSG("");
2155 }
2156 }
2157
2158 if (!session_found && session_name != NULL) {
2159 ERR("Session '%s' not found", session_name);
2160 ret = CMD_ERROR;
2161 goto end;
2162 }
2163
2164 if (session_name == NULL) {
2165 MSG("\nUse lttng list <session_name> for more details");
2166 }
2167 }
2168
2169 end:
2170 free(sessions);
2171 return ret;
2172 }
2173
2174
2175 /*
2176 * Machine Interface
2177 * list available domain(s) for a session.
2178 */
2179 static int mi_list_domains(struct lttng_domain *domains, int count)
2180 {
2181 int i, ret;
2182 /* Open domains element */
2183 ret = mi_lttng_domains_open(writer);
2184 if (ret) {
2185 goto end;
2186 }
2187
2188 for (i = 0; i < count; i++) {
2189 ret = mi_lttng_domain(writer, &domains[i] , 0);
2190 if (ret) {
2191 goto end;
2192 }
2193 }
2194
2195 /* Closing domains element */
2196 ret = mi_lttng_writer_close_element(writer);
2197 if (ret) {
2198 goto end;
2199 }
2200 end:
2201 return ret;
2202 }
2203
2204 /*
2205 * List available domain(s) for a session.
2206 */
2207 static int list_domains(const char *session_name)
2208 {
2209 int i, count, ret = CMD_SUCCESS;
2210 struct lttng_domain *domains = NULL;
2211
2212
2213 count = lttng_list_domains(session_name, &domains);
2214 if (count < 0) {
2215 ret = CMD_ERROR;
2216 ERR("%s", lttng_strerror(count));
2217 goto end;
2218 }
2219
2220 if (lttng_opt_mi) {
2221 /* Mi output */
2222 ret = mi_list_domains(domains, count);
2223 if (ret) {
2224 ret = CMD_ERROR;
2225 goto error;
2226 }
2227 } else {
2228 /* Pretty print */
2229 MSG("Domains:\n-------------");
2230 if (count == 0) {
2231 MSG(" None");
2232 goto end;
2233 }
2234
2235 for (i = 0; i < count; i++) {
2236 switch (domains[i].type) {
2237 case LTTNG_DOMAIN_KERNEL:
2238 MSG(" - Kernel");
2239 break;
2240 case LTTNG_DOMAIN_UST:
2241 MSG(" - UST global");
2242 break;
2243 case LTTNG_DOMAIN_JUL:
2244 MSG(" - JUL (Java Util Logging)");
2245 break;
2246 case LTTNG_DOMAIN_LOG4J:
2247 MSG(" - LOG4j (Logging for Java)");
2248 break;
2249 case LTTNG_DOMAIN_PYTHON:
2250 MSG(" - Python (logging)");
2251 break;
2252 default:
2253 break;
2254 }
2255 }
2256 }
2257
2258 error:
2259 free(domains);
2260
2261 end:
2262 return ret;
2263 }
2264
2265 /*
2266 * The 'list <options>' first level command
2267 */
2268 int cmd_list(int argc, const char **argv)
2269 {
2270 int opt, ret = CMD_SUCCESS;
2271 const char *session_name, *leftover = NULL;
2272 static poptContext pc;
2273 struct lttng_domain domain;
2274 struct lttng_domain *domains = NULL;
2275
2276 memset(&domain, 0, sizeof(domain));
2277
2278 if (argc < 1) {
2279 ret = CMD_ERROR;
2280 goto end;
2281 }
2282
2283 pc = poptGetContext(NULL, argc, argv, long_options, 0);
2284 poptReadDefaultConfig(pc, 0);
2285
2286 while ((opt = poptGetNextOpt(pc)) != -1) {
2287 switch (opt) {
2288 case OPT_HELP:
2289 SHOW_HELP();
2290 goto end;
2291 case OPT_USERSPACE:
2292 opt_userspace = 1;
2293 break;
2294 case OPT_LIST_OPTIONS:
2295 list_cmd_options(stdout, long_options);
2296 goto end;
2297 default:
2298 ret = CMD_UNDEFINED;
2299 goto end;
2300 }
2301 }
2302
2303 /* Mi check */
2304 if (lttng_opt_mi) {
2305 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
2306 if (!writer) {
2307 ret = CMD_ERROR;
2308 goto end;
2309 }
2310
2311 /* Open command element */
2312 ret = mi_lttng_writer_command_open(writer,
2313 mi_lttng_element_command_list);
2314 if (ret) {
2315 ret = CMD_ERROR;
2316 goto end;
2317 }
2318
2319 /* Open output element */
2320 ret = mi_lttng_writer_open_element(writer,
2321 mi_lttng_element_command_output);
2322 if (ret) {
2323 ret = CMD_ERROR;
2324 goto end;
2325 }
2326 }
2327
2328 /* Get session name (trailing argument) */
2329 session_name = poptGetArg(pc);
2330 DBG2("Session name: %s", session_name);
2331
2332 leftover = poptGetArg(pc);
2333 if (leftover) {
2334 ERR("Unknown argument: %s", leftover);
2335 ret = CMD_ERROR;
2336 goto end;
2337 }
2338
2339 if (opt_kernel) {
2340 domain.type = LTTNG_DOMAIN_KERNEL;
2341 } else if (opt_userspace) {
2342 DBG2("Listing userspace global domain");
2343 domain.type = LTTNG_DOMAIN_UST;
2344 } else if (opt_jul) {
2345 DBG2("Listing JUL domain");
2346 domain.type = LTTNG_DOMAIN_JUL;
2347 } else if (opt_log4j) {
2348 domain.type = LTTNG_DOMAIN_LOG4J;
2349 } else if (opt_python) {
2350 domain.type = LTTNG_DOMAIN_PYTHON;
2351 }
2352
2353 if (!opt_kernel && opt_syscall) {
2354 WARN("--syscall will only work with the Kernel domain (-k)");
2355 ret = CMD_ERROR;
2356 goto end;
2357 }
2358
2359 if (opt_kernel || opt_userspace || opt_jul || opt_log4j || opt_python) {
2360 handle = lttng_create_handle(session_name, &domain);
2361 if (handle == NULL) {
2362 ret = CMD_FATAL;
2363 goto end;
2364 }
2365 }
2366
2367 if (session_name == NULL) {
2368 if (!opt_kernel && !opt_userspace && !opt_jul && !opt_log4j
2369 && !opt_python) {
2370 ret = list_sessions(NULL);
2371 if (ret) {
2372 goto end;
2373 }
2374 }
2375 if (opt_kernel) {
2376 if (opt_syscall) {
2377 ret = list_syscalls();
2378 if (ret) {
2379 goto end;
2380 }
2381 } else {
2382 ret = list_kernel_events();
2383 if (ret) {
2384 goto end;
2385 }
2386 }
2387 }
2388 if (opt_userspace) {
2389 if (opt_fields) {
2390 ret = list_ust_event_fields();
2391 } else {
2392 ret = list_ust_events();
2393 }
2394 if (ret) {
2395 goto end;
2396 }
2397 }
2398 if (opt_jul || opt_log4j || opt_python) {
2399 ret = list_agent_events();
2400 if (ret) {
2401 goto end;
2402 }
2403 }
2404 } else {
2405 /* List session attributes */
2406 if (lttng_opt_mi) {
2407 /* Open element sessions
2408 * Present for xml consistency */
2409 ret = mi_lttng_sessions_open(writer);
2410 if (ret) {
2411 goto end;
2412 }
2413 }
2414 /* MI: the ouptut of list_sessions is an unclosed session element */
2415 ret = list_sessions(session_name);
2416 if (ret) {
2417 goto end;
2418 }
2419
2420 ret = list_rotate_settings(session_name);
2421 if (ret) {
2422 goto end;
2423 }
2424
2425 /* Domain listing */
2426 if (opt_domain) {
2427 ret = list_domains(session_name);
2428 goto end;
2429 }
2430
2431 /* Channel listing */
2432 if (opt_kernel || opt_userspace) {
2433 if (lttng_opt_mi) {
2434 /* Add of domains and domain element for xml
2435 * consistency and validation
2436 */
2437 ret = mi_lttng_domains_open(writer);
2438 if (ret) {
2439 goto end;
2440 }
2441
2442 /* Open domain and leave it open for
2443 * nested channels printing */
2444 ret = mi_lttng_domain(writer, &domain, 1);
2445 if (ret) {
2446 goto end;
2447 }
2448
2449 }
2450
2451
2452 /* Trackers */
2453 ret = list_trackers(&domain);
2454 if (ret) {
2455 goto end;
2456 }
2457
2458 /* Channels */
2459 ret = list_channels(opt_channel);
2460 if (ret) {
2461 goto end;
2462 }
2463
2464 if (lttng_opt_mi) {
2465 /* Close domain and domain element */
2466 ret = mi_lttng_close_multi_element(writer, 2);
2467 }
2468 if (ret) {
2469 goto end;
2470 }
2471
2472
2473 } else {
2474 int i, nb_domain;
2475
2476 /* We want all domain(s) */
2477 nb_domain = lttng_list_domains(session_name, &domains);
2478 if (nb_domain < 0) {
2479 ret = CMD_ERROR;
2480 ERR("%s", lttng_strerror(nb_domain));
2481 goto end;
2482 }
2483
2484 if (lttng_opt_mi) {
2485 ret = mi_lttng_domains_open(writer);
2486 if (ret) {
2487 ret = CMD_ERROR;
2488 goto end;
2489 }
2490 }
2491
2492 for (i = 0; i < nb_domain; i++) {
2493 switch (domains[i].type) {
2494 case LTTNG_DOMAIN_KERNEL:
2495 MSG("=== Domain: Linux kernel ===\n");
2496 break;
2497 case LTTNG_DOMAIN_UST:
2498 MSG("=== Domain: User space ===\n");
2499 MSG("Buffering scheme: %s\n",
2500 domains[i].buf_type ==
2501 LTTNG_BUFFER_PER_PID ? "per-process" : "per-user");
2502 break;
2503 case LTTNG_DOMAIN_JUL:
2504 MSG("=== Domain: java.util.logging (JUL) ===\n");
2505 break;
2506 case LTTNG_DOMAIN_LOG4J:
2507 MSG("=== Domain: log4j ===\n");
2508 break;
2509 case LTTNG_DOMAIN_PYTHON:
2510 MSG("=== Domain: Python logging ===\n");
2511 break;
2512 default:
2513 MSG("=== Domain: Unimplemented ===\n");
2514 break;
2515 }
2516
2517 if (lttng_opt_mi) {
2518 ret = mi_lttng_domain(writer, &domains[i], 1);
2519 if (ret) {
2520 ret = CMD_ERROR;
2521 goto end;
2522 }
2523 }
2524
2525 /* Clean handle before creating a new one */
2526 if (handle) {
2527 lttng_destroy_handle(handle);
2528 }
2529
2530 handle = lttng_create_handle(session_name, &domains[i]);
2531 if (handle == NULL) {
2532 ret = CMD_FATAL;
2533 goto end;
2534 }
2535
2536 if (domains[i].type == LTTNG_DOMAIN_JUL ||
2537 domains[i].type == LTTNG_DOMAIN_LOG4J ||
2538 domains[i].type == LTTNG_DOMAIN_PYTHON) {
2539 ret = list_session_agent_events();
2540 if (ret) {
2541 goto end;
2542 }
2543
2544 goto next_domain;
2545 }
2546
2547 switch (domains[i].type) {
2548 case LTTNG_DOMAIN_KERNEL:
2549 case LTTNG_DOMAIN_UST:
2550 ret = list_trackers(&domains[i]);
2551 if (ret) {
2552 goto end;
2553 }
2554 break;
2555 default:
2556 break;
2557 }
2558
2559 ret = list_channels(opt_channel);
2560 if (ret) {
2561 goto end;
2562 }
2563
2564 next_domain:
2565 if (lttng_opt_mi) {
2566 /* Close domain element */
2567 ret = mi_lttng_writer_close_element(writer);
2568 if (ret) {
2569 ret = CMD_ERROR;
2570 goto end;
2571 }
2572 }
2573
2574 }
2575 if (lttng_opt_mi) {
2576 /* Close the domains, session and sessions element */
2577 ret = mi_lttng_close_multi_element(writer, 3);
2578 if (ret) {
2579 ret = CMD_ERROR;
2580 goto end;
2581 }
2582 }
2583 }
2584 }
2585
2586 /* Mi closing */
2587 if (lttng_opt_mi) {
2588 /* Close output element */
2589 ret = mi_lttng_writer_close_element(writer);
2590 if (ret) {
2591 ret = CMD_ERROR;
2592 goto end;
2593 }
2594
2595 /* Command element close */
2596 ret = mi_lttng_writer_command_close(writer);
2597 if (ret) {
2598 ret = CMD_ERROR;
2599 goto end;
2600 }
2601 }
2602 end:
2603 /* Mi clean-up */
2604 if (writer && mi_lttng_writer_destroy(writer)) {
2605 /* Preserve original error code */
2606 ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
2607 }
2608
2609 free(domains);
2610 if (handle) {
2611 lttng_destroy_handle(handle);
2612 }
2613
2614 poptFreeContext(pc);
2615 return ret;
2616 }
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