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[lttng-tools.git] / src / bin / lttng / commands / list.c
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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 <common/time.h>
28#include <lttng/constant.h>
29
30#include "../command.h"
31
32static int opt_userspace;
33static int opt_kernel;
34static int opt_jul;
35static int opt_log4j;
36static int opt_python;
37static char *opt_channel;
38static int opt_domain;
39static int opt_fields;
40static int opt_syscall;
41
42const char *indent4 = " ";
43const char *indent6 = " ";
44const char *indent8 = " ";
45
46#ifdef LTTNG_EMBED_HELP
47static const char help_msg[] =
48#include <lttng-list.1.h>
49;
50#endif
51
52enum {
53 OPT_HELP = 1,
54 OPT_USERSPACE,
55 OPT_LIST_OPTIONS,
56};
57
58static struct lttng_handle *handle;
59static struct mi_writer *writer;
60
61/* Only set when listing a single session. */
62static struct lttng_session listed_session;
63
64static struct poptOption long_options[] = {
65 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
66 {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
67 {"kernel", 'k', POPT_ARG_VAL, &opt_kernel, 1, 0, 0},
68 {"jul", 'j', POPT_ARG_VAL, &opt_jul, 1, 0, 0},
69 {"log4j", 'l', POPT_ARG_VAL, &opt_log4j, 1, 0, 0},
70 {"python", 'p', POPT_ARG_VAL, &opt_python, 1, 0, 0},
71 {"userspace", 'u', POPT_ARG_NONE, 0, OPT_USERSPACE, 0, 0},
72 {"channel", 'c', POPT_ARG_STRING, &opt_channel, 0, 0, 0},
73 {"domain", 'd', POPT_ARG_VAL, &opt_domain, 1, 0, 0},
74 {"fields", 'f', POPT_ARG_VAL, &opt_fields, 1, 0, 0},
75 {"syscall", 'S', POPT_ARG_VAL, &opt_syscall, 1, 0, 0},
76 {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
77 {0, 0, 0, 0, 0, 0, 0}
78};
79
80/*
81 * Get command line from /proc for a specific pid.
82 *
83 * On success, return an allocated string pointer to the proc cmdline.
84 * On error, return NULL.
85 */
86static char *get_cmdline_by_pid(pid_t pid)
87{
88 int ret;
89 FILE *fp = NULL;
90 char *cmdline = NULL;
91 /* Can't go bigger than /proc/LTTNG_MAX_PID/cmdline */
92 char path[sizeof("/proc//cmdline") + sizeof(LTTNG_MAX_PID_STR) - 1];
93
94 snprintf(path, sizeof(path), "/proc/%d/cmdline", pid);
95 fp = fopen(path, "r");
96 if (fp == NULL) {
97 goto end;
98 }
99
100 /* Caller must free() *cmdline */
101 cmdline = zmalloc(PATH_MAX);
102 if (!cmdline) {
103 PERROR("malloc cmdline");
104 goto end;
105 }
106 ret = fread(cmdline, 1, PATH_MAX, fp);
107 if (ret < 0) {
108 PERROR("fread proc list");
109 }
110
111end:
112 if (fp) {
113 fclose(fp);
114 }
115 return cmdline;
116}
117
118static
119const char *active_string(int value)
120{
121 switch (value) {
122 case 0: return "inactive";
123 case 1: return "active";
124 case -1: return "";
125 default: return NULL;
126 }
127}
128
129static const char *snapshot_string(int value)
130{
131 switch (value) {
132 case 1:
133 return " snapshot";
134 default:
135 return "";
136 }
137}
138
139static
140const char *enabled_string(int value)
141{
142 switch (value) {
143 case 0: return " [disabled]";
144 case 1: return " [enabled]";
145 case -1: return "";
146 default: return NULL;
147 }
148}
149
150static
151const char *safe_string(const char *str)
152{
153 return str ? str : "";
154}
155
156static const char *logleveltype_string(enum lttng_loglevel_type value)
157{
158 switch (value) {
159 case LTTNG_EVENT_LOGLEVEL_ALL:
160 return ":";
161 case LTTNG_EVENT_LOGLEVEL_RANGE:
162 return " <=";
163 case LTTNG_EVENT_LOGLEVEL_SINGLE:
164 return " ==";
165 default:
166 return " <<TYPE UNKN>>";
167 }
168}
169
170static const char *bitness_event(enum lttng_event_flag flags)
171{
172 if (flags & LTTNG_EVENT_FLAG_SYSCALL_32) {
173 if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
174 return " [32/64-bit]";
175 } else {
176 return " [32-bit]";
177 }
178 } else if (flags & LTTNG_EVENT_FLAG_SYSCALL_64) {
179 return " [64-bit]";
180 } else {
181 return "";
182 }
183}
184
185/*
186 * Get exclusion names message for a single event.
187 *
188 * Returned pointer must be freed by caller. Returns NULL on error.
189 */
190static char *get_exclusion_names_msg(struct lttng_event *event)
191{
192 int ret;
193 int exclusion_count;
194 char *exclusion_msg = NULL;
195 char *at;
196 size_t i;
197 const char * const exclusion_fmt = " [exclusions: ";
198 const size_t exclusion_fmt_len = strlen(exclusion_fmt);
199
200 exclusion_count = lttng_event_get_exclusion_name_count(event);
201 if (exclusion_count < 0) {
202 goto end;
203 } else if (exclusion_count == 0) {
204 /*
205 * No exclusions: return copy of empty string so that
206 * it can be freed by caller.
207 */
208 exclusion_msg = strdup("");
209 goto end;
210 }
211
212 /*
213 * exclusion_msg's size is bounded by the exclusion_fmt string,
214 * a comma per entry, the entry count (fixed-size), a closing
215 * bracket, and a trailing \0.
216 */
217 exclusion_msg = malloc(exclusion_count +
218 exclusion_count * LTTNG_SYMBOL_NAME_LEN +
219 exclusion_fmt_len + 1);
220 if (!exclusion_msg) {
221 goto end;
222 }
223
224 at = strcpy(exclusion_msg, exclusion_fmt) + exclusion_fmt_len;
225 for (i = 0; i < exclusion_count; ++i) {
226 const char *name;
227
228 /* Append comma between exclusion names */
229 if (i > 0) {
230 *at = ',';
231 at++;
232 }
233
234 ret = lttng_event_get_exclusion_name(event, i, &name);
235 if (ret) {
236 /* Prints '?' on local error; should never happen */
237 *at = '?';
238 at++;
239 continue;
240 }
241
242 /* Append exclusion name */
243 at += sprintf(at, "%s", name);
244 }
245
246 /* This also puts a final '\0' at the end of exclusion_msg */
247 strcpy(at, "]");
248
249end:
250 return exclusion_msg;
251}
252
253static void print_userspace_probe_location(struct lttng_event *event)
254{
255 const struct lttng_userspace_probe_location *location;
256 const struct lttng_userspace_probe_location_lookup_method *lookup_method;
257 enum lttng_userspace_probe_location_lookup_method_type lookup_type;
258
259 location = lttng_event_get_userspace_probe_location(event);
260 if (!location) {
261 MSG("Event has no userspace probe location");
262 return;
263 }
264
265 lookup_method = lttng_userspace_probe_location_get_lookup_method(location);
266 if (!lookup_method) {
267 MSG("Event has no userspace probe location lookup method");
268 return;
269 }
270
271 MSG("%s%s (type: userspace-probe)%s", indent6, event->name, enabled_string(event->enabled));
272
273 lookup_type = lttng_userspace_probe_location_lookup_method_get_type(lookup_method);
274
275 switch (lttng_userspace_probe_location_get_type(location)) {
276 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN:
277 MSG("%sType: Unknown", indent8);
278 break;
279 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION:
280 {
281 const char *function_name;
282 const char *binary_path;
283
284 MSG("%sType: Function", indent8);
285 function_name = lttng_userspace_probe_location_function_get_function_name(location);
286 binary_path = realpath(lttng_userspace_probe_location_function_get_binary_path(location), NULL);
287
288 MSG("%sBinary path: %s", indent8, binary_path ? binary_path : "NULL");
289 MSG("%sFunction: %s()", indent8, function_name ? function_name : "NULL");
290 switch (lookup_type) {
291 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF:
292 MSG("%sLookup method: ELF", indent8);
293 break;
294 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT:
295 MSG("%sLookup method: default", indent8);
296 break;
297 default:
298 MSG("%sLookup method: INVALID LOOKUP TYPE ENCOUNTERED", indent8);
299 break;
300 }
301 break;
302 }
303 case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT:
304 {
305 const char *probe_name, *provider_name;
306 const char *binary_path;
307
308 MSG("%sType: Tracepoint", indent8);
309 probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location);
310 provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location);
311 binary_path = realpath(lttng_userspace_probe_location_tracepoint_get_binary_path(location), NULL);
312 MSG("%sBinary path: %s", indent8, binary_path ? binary_path : "NULL");
313 MSG("%sTracepoint: %s:%s", indent8, provider_name ? provider_name : "NULL", probe_name ? probe_name : "NULL");
314 switch (lookup_type) {
315 case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT:
316 MSG("%sLookup method: SDT", indent8);
317 break;
318 default:
319 MSG("%sLookup method: INVALID LOOKUP TYPE ENCOUNTERED", indent8);
320 break;
321 }
322 break;
323 }
324 default:
325 ERR("Invalid probe type encountered");
326 }
327}
328
329/*
330 * Pretty print single event.
331 */
332static void print_events(struct lttng_event *event)
333{
334 int ret;
335 const char *filter_str;
336 char *filter_msg = NULL;
337 char *exclusion_msg = NULL;
338
339 ret = lttng_event_get_filter_expression(event, &filter_str);
340
341 if (ret) {
342 filter_msg = strdup(" [failed to retrieve filter]");
343 } else if (filter_str) {
344 const char * const filter_fmt = " [filter: '%s']";
345
346 filter_msg = malloc(strlen(filter_str) +
347 strlen(filter_fmt) + 1);
348 if (filter_msg) {
349 sprintf(filter_msg, filter_fmt,
350 filter_str);
351 }
352 }
353
354 exclusion_msg = get_exclusion_names_msg(event);
355 if (!exclusion_msg) {
356 exclusion_msg = strdup(" [failed to retrieve exclusions]");
357 }
358
359 switch (event->type) {
360 case LTTNG_EVENT_TRACEPOINT:
361 {
362 if (event->loglevel != -1) {
363 MSG("%s%s (loglevel%s %s (%d)) (type: tracepoint)%s%s%s",
364 indent6,
365 event->name,
366 logleveltype_string(event->loglevel_type),
367 mi_lttng_loglevel_string(event->loglevel, handle->domain.type),
368 event->loglevel,
369 enabled_string(event->enabled),
370 safe_string(exclusion_msg),
371 safe_string(filter_msg));
372 } else {
373 MSG("%s%s (type: tracepoint)%s%s%s",
374 indent6,
375 event->name,
376 enabled_string(event->enabled),
377 safe_string(exclusion_msg),
378 safe_string(filter_msg));
379 }
380 break;
381 }
382 case LTTNG_EVENT_FUNCTION:
383 MSG("%s%s (type: function)%s%s", indent6,
384 event->name, enabled_string(event->enabled),
385 safe_string(filter_msg));
386 if (event->attr.probe.addr != 0) {
387 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
388 } else {
389 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
390 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
391 }
392 break;
393 case LTTNG_EVENT_PROBE:
394 MSG("%s%s (type: probe)%s%s", indent6,
395 event->name, enabled_string(event->enabled),
396 safe_string(filter_msg));
397 if (event->attr.probe.addr != 0) {
398 MSG("%saddr: 0x%" PRIx64, indent8, event->attr.probe.addr);
399 } else {
400 MSG("%soffset: 0x%" PRIx64, indent8, event->attr.probe.offset);
401 MSG("%ssymbol: %s", indent8, event->attr.probe.symbol_name);
402 }
403 break;
404 case LTTNG_EVENT_USERSPACE_PROBE:
405 print_userspace_probe_location(event);
406 break;
407 case LTTNG_EVENT_FUNCTION_ENTRY:
408 MSG("%s%s (type: function)%s%s", indent6,
409 event->name, enabled_string(event->enabled),
410 safe_string(filter_msg));
411 MSG("%ssymbol: \"%s\"", indent8, event->attr.ftrace.symbol_name);
412 break;
413 case LTTNG_EVENT_SYSCALL:
414 MSG("%s%s%s%s%s%s", indent6, event->name,
415 (opt_syscall ? "" : " (type:syscall)"),
416 enabled_string(event->enabled),
417 bitness_event(event->flags),
418 safe_string(filter_msg));
419 break;
420 case LTTNG_EVENT_NOOP:
421 MSG("%s (type: noop)%s%s", indent6,
422 enabled_string(event->enabled),
423 safe_string(filter_msg));
424 break;
425 case LTTNG_EVENT_ALL:
426 /* Fall-through. */
427 default:
428 /* We should never have "all" events in list. */
429 assert(0);
430 break;
431 }
432
433 free(filter_msg);
434 free(exclusion_msg);
435}
436
437static const char *field_type(struct lttng_event_field *field)
438{
439 switch(field->type) {
440 case LTTNG_EVENT_FIELD_INTEGER:
441 return "integer";
442 case LTTNG_EVENT_FIELD_ENUM:
443 return "enum";
444 case LTTNG_EVENT_FIELD_FLOAT:
445 return "float";
446 case LTTNG_EVENT_FIELD_STRING:
447 return "string";
448 case LTTNG_EVENT_FIELD_OTHER:
449 default: /* fall-through */
450 return "unknown";
451 }
452}
453
454/*
455 * Pretty print single event fields.
456 */
457static void print_event_field(struct lttng_event_field *field)
458{
459 if (!field->field_name[0]) {
460 return;
461 }
462 MSG("%sfield: %s (%s)%s", indent8, field->field_name,
463 field_type(field), field->nowrite ? " [no write]" : "");
464}
465
466/*
467 * Machine interface
468 * Jul and ust event listing
469 */
470static int mi_list_agent_ust_events(struct lttng_event *events, int count,
471 struct lttng_domain *domain)
472{
473 int ret, i;
474 pid_t cur_pid = 0;
475 char *cmdline = NULL;
476 int pid_element_open = 0;
477
478 /* Open domains element */
479 ret = mi_lttng_domains_open(writer);
480 if (ret) {
481 goto end;
482 }
483
484 /* Write domain */
485 ret = mi_lttng_domain(writer, domain, 1);
486 if (ret) {
487 goto end;
488 }
489
490 /* Open pids element element */
491 ret = mi_lttng_pids_open(writer);
492 if (ret) {
493 goto end;
494 }
495
496 for (i = 0; i < count; i++) {
497 if (cur_pid != events[i].pid) {
498 if (pid_element_open) {
499 /* Close the previous events and pid element */
500 ret = mi_lttng_close_multi_element(writer, 2);
501 if (ret) {
502 goto end;
503 }
504 pid_element_open = 0;
505 }
506
507 cur_pid = events[i].pid;
508 cmdline = get_cmdline_by_pid(cur_pid);
509 if (!cmdline) {
510 ret = CMD_ERROR;
511 goto end;
512 }
513
514 if (!pid_element_open) {
515 /* Open and write a pid element */
516 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
517 if (ret) {
518 goto error;
519 }
520
521 /* Open events element */
522 ret = mi_lttng_events_open(writer);
523 if (ret) {
524 goto error;
525 }
526
527 pid_element_open = 1;
528 }
529 free(cmdline);
530 }
531
532 /* Write an event */
533 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
534 if (ret) {
535 goto end;
536 }
537 }
538
539 /* Close pids */
540 ret = mi_lttng_writer_close_element(writer);
541 if (ret) {
542 goto end;
543 }
544
545 /* Close domain, domains */
546 ret = mi_lttng_close_multi_element(writer, 2);
547end:
548 return ret;
549error:
550 free(cmdline);
551 return ret;
552}
553
554static int list_agent_events(void)
555{
556 int i, size, ret = CMD_SUCCESS;
557 struct lttng_domain domain;
558 struct lttng_handle *handle = NULL;
559 struct lttng_event *event_list = NULL;
560 pid_t cur_pid = 0;
561 char *cmdline = NULL;
562 const char *agent_domain_str;
563
564 memset(&domain, 0, sizeof(domain));
565 if (opt_jul) {
566 domain.type = LTTNG_DOMAIN_JUL;
567 } else if (opt_log4j) {
568 domain.type = LTTNG_DOMAIN_LOG4J;
569 } else if (opt_python) {
570 domain.type = LTTNG_DOMAIN_PYTHON;
571 } else {
572 ERR("Invalid agent domain selected.");
573 ret = CMD_ERROR;
574 goto error;
575 }
576
577 agent_domain_str = get_domain_str(domain.type);
578
579 DBG("Getting %s tracing events", agent_domain_str);
580
581 handle = lttng_create_handle(NULL, &domain);
582 if (handle == NULL) {
583 ret = CMD_ERROR;
584 goto end;
585 }
586
587 size = lttng_list_tracepoints(handle, &event_list);
588 if (size < 0) {
589 ERR("Unable to list %s events: %s", agent_domain_str,
590 lttng_strerror(size));
591 ret = CMD_ERROR;
592 goto end;
593 }
594
595 if (lttng_opt_mi) {
596 /* Mi print */
597 ret = mi_list_agent_ust_events(event_list, size, &domain);
598 if (ret) {
599 ret = CMD_ERROR;
600 goto error;
601 }
602 } else {
603 /* Pretty print */
604 MSG("%s events (Logger name):\n-------------------------",
605 agent_domain_str);
606
607 if (size == 0) {
608 MSG("None");
609 }
610
611 for (i = 0; i < size; i++) {
612 if (cur_pid != event_list[i].pid) {
613 cur_pid = event_list[i].pid;
614 cmdline = get_cmdline_by_pid(cur_pid);
615 if (cmdline == NULL) {
616 ret = CMD_ERROR;
617 goto error;
618 }
619 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
620 free(cmdline);
621 }
622 MSG("%s- %s", indent6, event_list[i].name);
623 }
624
625 MSG("");
626 }
627
628error:
629 free(event_list);
630end:
631 lttng_destroy_handle(handle);
632 return ret;
633}
634
635/*
636 * Ask session daemon for all user space tracepoints available.
637 */
638static int list_ust_events(void)
639{
640 int i, size, ret = CMD_SUCCESS;
641 struct lttng_domain domain;
642 struct lttng_handle *handle;
643 struct lttng_event *event_list = NULL;
644 pid_t cur_pid = 0;
645 char *cmdline = NULL;
646
647 memset(&domain, 0, sizeof(domain));
648
649 DBG("Getting UST tracing events");
650
651 domain.type = LTTNG_DOMAIN_UST;
652
653 handle = lttng_create_handle(NULL, &domain);
654 if (handle == NULL) {
655 ret = CMD_ERROR;
656 goto end;
657 }
658
659 size = lttng_list_tracepoints(handle, &event_list);
660 if (size < 0) {
661 ERR("Unable to list UST events: %s", lttng_strerror(size));
662 ret = CMD_ERROR;
663 goto error;
664 }
665
666 if (lttng_opt_mi) {
667 /* Mi print */
668 ret = mi_list_agent_ust_events(event_list, size, &domain);
669 } else {
670 /* Pretty print */
671 MSG("UST events:\n-------------");
672
673 if (size == 0) {
674 MSG("None");
675 }
676
677 for (i = 0; i < size; i++) {
678 if (cur_pid != event_list[i].pid) {
679 cur_pid = event_list[i].pid;
680 cmdline = get_cmdline_by_pid(cur_pid);
681 if (cmdline == NULL) {
682 ret = CMD_ERROR;
683 goto error;
684 }
685 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
686 free(cmdline);
687 }
688 print_events(&event_list[i]);
689 }
690
691 MSG("");
692 }
693
694error:
695 free(event_list);
696end:
697 lttng_destroy_handle(handle);
698 return ret;
699}
700
701/*
702 * Machine interface
703 * List all ust event with their fields
704 */
705static int mi_list_ust_event_fields(struct lttng_event_field *fields, int count,
706 struct lttng_domain *domain)
707{
708 int ret, i;
709 pid_t cur_pid = 0;
710 char *cmdline = NULL;
711 int pid_element_open = 0;
712 int event_element_open = 0;
713 struct lttng_event cur_event;
714
715 memset(&cur_event, 0, sizeof(cur_event));
716
717 /* Open domains element */
718 ret = mi_lttng_domains_open(writer);
719 if (ret) {
720 goto end;
721 }
722
723 /* Write domain */
724 ret = mi_lttng_domain(writer, domain, 1);
725 if (ret) {
726 goto end;
727 }
728
729 /* Open pids element */
730 ret = mi_lttng_pids_open(writer);
731 if (ret) {
732 goto end;
733 }
734
735 for (i = 0; i < count; i++) {
736 if (cur_pid != fields[i].event.pid) {
737 if (pid_element_open) {
738 if (event_element_open) {
739 /* Close the previous field element and event. */
740 ret = mi_lttng_close_multi_element(writer, 2);
741 if (ret) {
742 goto end;
743 }
744 event_element_open = 0;
745 }
746 /* Close the previous events, pid element */
747 ret = mi_lttng_close_multi_element(writer, 2);
748 if (ret) {
749 goto end;
750 }
751 pid_element_open = 0;
752 }
753
754 cur_pid = fields[i].event.pid;
755 cmdline = get_cmdline_by_pid(cur_pid);
756 if (!pid_element_open) {
757 /* Open and write a pid element */
758 ret = mi_lttng_pid(writer, cur_pid, cmdline, 1);
759 if (ret) {
760 goto error;
761 }
762
763 /* Open events element */
764 ret = mi_lttng_events_open(writer);
765 if (ret) {
766 goto error;
767 }
768 pid_element_open = 1;
769 }
770 free(cmdline);
771 /* Wipe current event since we are about to print a new PID. */
772 memset(&cur_event, 0, sizeof(cur_event));
773 }
774
775 if (strcmp(cur_event.name, fields[i].event.name) != 0) {
776 if (event_element_open) {
777 /* Close the previous fields element and the previous event */
778 ret = mi_lttng_close_multi_element(writer, 2);
779 if (ret) {
780 goto end;
781 }
782 event_element_open = 0;
783 }
784
785 memcpy(&cur_event, &fields[i].event,
786 sizeof(cur_event));
787
788 if (!event_element_open) {
789 /* Open and write the event */
790 ret = mi_lttng_event(writer, &cur_event, 1,
791 handle->domain.type);
792 if (ret) {
793 goto end;
794 }
795
796 /* Open a fields element */
797 ret = mi_lttng_event_fields_open(writer);
798 if (ret) {
799 goto end;
800 }
801 event_element_open = 1;
802 }
803 }
804
805 /* Print the event_field */
806 ret = mi_lttng_event_field(writer, &fields[i]);
807 if (ret) {
808 goto end;
809 }
810 }
811
812 /* Close pid, domain, domains */
813 ret = mi_lttng_close_multi_element(writer, 3);
814end:
815 return ret;
816error:
817 free(cmdline);
818 return ret;
819}
820
821/*
822 * Ask session daemon for all user space tracepoint fields available.
823 */
824static int list_ust_event_fields(void)
825{
826 int i, size, ret = CMD_SUCCESS;
827 struct lttng_domain domain;
828 struct lttng_handle *handle;
829 struct lttng_event_field *event_field_list;
830 pid_t cur_pid = 0;
831 char *cmdline = NULL;
832
833 struct lttng_event cur_event;
834
835 memset(&domain, 0, sizeof(domain));
836 memset(&cur_event, 0, sizeof(cur_event));
837
838 DBG("Getting UST tracing event fields");
839
840 domain.type = LTTNG_DOMAIN_UST;
841
842 handle = lttng_create_handle(NULL, &domain);
843 if (handle == NULL) {
844 ret = CMD_ERROR;
845 goto end;
846 }
847
848 size = lttng_list_tracepoint_fields(handle, &event_field_list);
849 if (size < 0) {
850 ERR("Unable to list UST event fields: %s", lttng_strerror(size));
851 ret = CMD_ERROR;
852 goto end;
853 }
854
855 if (lttng_opt_mi) {
856 /* Mi print */
857 ret = mi_list_ust_event_fields(event_field_list, size, &domain);
858 if (ret) {
859 ret = CMD_ERROR;
860 goto error;
861 }
862 } else {
863 /* Pretty print */
864 MSG("UST events:\n-------------");
865
866 if (size == 0) {
867 MSG("None");
868 }
869
870 for (i = 0; i < size; i++) {
871 if (cur_pid != event_field_list[i].event.pid) {
872 cur_pid = event_field_list[i].event.pid;
873 cmdline = get_cmdline_by_pid(cur_pid);
874 if (cmdline == NULL) {
875 ret = CMD_ERROR;
876 goto error;
877 }
878 MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
879 free(cmdline);
880 /* Wipe current event since we are about to print a new PID. */
881 memset(&cur_event, 0, sizeof(cur_event));
882 }
883 if (strcmp(cur_event.name, event_field_list[i].event.name) != 0) {
884 print_events(&event_field_list[i].event);
885 memcpy(&cur_event, &event_field_list[i].event,
886 sizeof(cur_event));
887 }
888 print_event_field(&event_field_list[i]);
889 }
890
891 MSG("");
892 }
893
894error:
895 free(event_field_list);
896end:
897 lttng_destroy_handle(handle);
898 return ret;
899}
900
901/*
902 * Machine interface
903 * Print a list of kernel events
904 */
905static int mi_list_kernel_events(struct lttng_event *events, int count,
906 struct lttng_domain *domain)
907{
908 int ret, i;
909
910 /* Open domains element */
911 ret = mi_lttng_domains_open(writer);
912 if (ret) {
913 goto end;
914 }
915
916 /* Write domain */
917 ret = mi_lttng_domain(writer, domain, 1);
918 if (ret) {
919 goto end;
920 }
921
922 /* Open events */
923 ret = mi_lttng_events_open(writer);
924 if (ret) {
925 goto end;
926 }
927
928 for (i = 0; i < count; i++) {
929 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
930 if (ret) {
931 goto end;
932 }
933 }
934
935 /* close events, domain and domains */
936 ret = mi_lttng_close_multi_element(writer, 3);
937 if (ret) {
938 goto end;
939 }
940
941end:
942 return ret;
943}
944
945/*
946 * Ask for all trace events in the kernel
947 */
948static int list_kernel_events(void)
949{
950 int i, size, ret = CMD_SUCCESS;
951 struct lttng_domain domain;
952 struct lttng_handle *handle;
953 struct lttng_event *event_list;
954
955 memset(&domain, 0, sizeof(domain));
956
957 DBG("Getting kernel tracing events");
958
959 domain.type = LTTNG_DOMAIN_KERNEL;
960
961 handle = lttng_create_handle(NULL, &domain);
962 if (handle == NULL) {
963 ret = CMD_ERROR;
964 goto error;
965 }
966
967 size = lttng_list_tracepoints(handle, &event_list);
968 if (size < 0) {
969 ERR("Unable to list kernel events: %s", lttng_strerror(size));
970 lttng_destroy_handle(handle);
971 return CMD_ERROR;
972 }
973
974 if (lttng_opt_mi) {
975 /* Mi print */
976 ret = mi_list_kernel_events(event_list, size, &domain);
977 if (ret) {
978 ret = CMD_ERROR;
979 goto end;
980 }
981 } else {
982 MSG("Kernel events:\n-------------");
983
984 for (i = 0; i < size; i++) {
985 print_events(&event_list[i]);
986 }
987
988 MSG("");
989 }
990
991end:
992 free(event_list);
993
994 lttng_destroy_handle(handle);
995 return ret;
996
997error:
998 lttng_destroy_handle(handle);
999 return ret;
1000}
1001
1002/*
1003 * Machine interface
1004 * Print a list of system calls.
1005 */
1006static int mi_list_syscalls(struct lttng_event *events, int count)
1007{
1008 int ret, i;
1009
1010 /* Open events */
1011 ret = mi_lttng_events_open(writer);
1012 if (ret) {
1013 goto end;
1014 }
1015
1016 for (i = 0; i < count; i++) {
1017 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1018 if (ret) {
1019 goto end;
1020 }
1021 }
1022
1023 /* Close events. */
1024 ret = mi_lttng_writer_close_element(writer);
1025 if (ret) {
1026 goto end;
1027 }
1028
1029end:
1030 return ret;
1031}
1032
1033/*
1034 * Ask for kernel system calls.
1035 */
1036static int list_syscalls(void)
1037{
1038 int i, size, ret = CMD_SUCCESS;
1039 struct lttng_event *event_list;
1040
1041 DBG("Getting kernel system call events");
1042
1043 size = lttng_list_syscalls(&event_list);
1044 if (size < 0) {
1045 ERR("Unable to list system calls: %s", lttng_strerror(size));
1046 ret = CMD_ERROR;
1047 goto error;
1048 }
1049
1050 if (lttng_opt_mi) {
1051 /* Mi print */
1052 ret = mi_list_syscalls(event_list, size);
1053 if (ret) {
1054 ret = CMD_ERROR;
1055 goto end;
1056 }
1057 } else {
1058 MSG("System calls:\n-------------");
1059
1060 for (i = 0; i < size; i++) {
1061 print_events(&event_list[i]);
1062 }
1063
1064 MSG("");
1065 }
1066
1067end:
1068 free(event_list);
1069 return ret;
1070
1071error:
1072 return ret;
1073}
1074
1075/*
1076 * Machine Interface
1077 * Print a list of agent events
1078 */
1079static int mi_list_session_agent_events(struct lttng_event *events, int count)
1080{
1081 int ret, i;
1082
1083 /* Open events element */
1084 ret = mi_lttng_events_open(writer);
1085 if (ret) {
1086 goto end;
1087 }
1088
1089 for (i = 0; i < count; i++) {
1090 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1091 if (ret) {
1092 goto end;
1093 }
1094 }
1095
1096 /* Close events element */
1097 ret = mi_lttng_writer_close_element(writer);
1098
1099end:
1100 return ret;
1101}
1102
1103/*
1104 * List agent events for a specific session using the handle.
1105 *
1106 * Return CMD_SUCCESS on success else a negative value.
1107 */
1108static int list_session_agent_events(void)
1109{
1110 int ret = CMD_SUCCESS, count, i;
1111 struct lttng_event *events = NULL;
1112
1113 count = lttng_list_events(handle, "", &events);
1114 if (count < 0) {
1115 ret = CMD_ERROR;
1116 ERR("%s", lttng_strerror(count));
1117 goto error;
1118 }
1119
1120 if (lttng_opt_mi) {
1121 /* Mi print */
1122 ret = mi_list_session_agent_events(events, count);
1123 if (ret) {
1124 ret = CMD_ERROR;
1125 goto end;
1126 }
1127 } else {
1128 /* Pretty print */
1129 MSG("Events (Logger name):\n---------------------");
1130 if (count == 0) {
1131 MSG("%sNone\n", indent6);
1132 goto end;
1133 }
1134
1135 for (i = 0; i < count; i++) {
1136 const char *filter_str;
1137 char *filter_msg = NULL;
1138 struct lttng_event *event = &events[i];
1139
1140 ret = lttng_event_get_filter_expression(event,
1141 &filter_str);
1142 if (ret) {
1143 filter_msg = strdup(" [failed to retrieve filter]");
1144 } else if (filter_str) {
1145 const char * const filter_fmt =
1146 " [filter: '%s']";
1147
1148 filter_msg = malloc(strlen(filter_str) +
1149 strlen(filter_fmt) + 1);
1150 if (filter_msg) {
1151 sprintf(filter_msg, filter_fmt,
1152 filter_str);
1153 }
1154 }
1155
1156 if (event->loglevel_type !=
1157 LTTNG_EVENT_LOGLEVEL_ALL) {
1158 MSG("%s- %s%s (loglevel%s %s)%s", indent4,
1159 event->name,
1160 enabled_string(event->enabled),
1161 logleveltype_string(
1162 event->loglevel_type),
1163 mi_lttng_loglevel_string(
1164 event->loglevel,
1165 handle->domain.type),
1166 safe_string(filter_msg));
1167 } else {
1168 MSG("%s- %s%s%s", indent4, event->name,
1169 enabled_string(event->enabled),
1170 safe_string(filter_msg));
1171 }
1172 free(filter_msg);
1173 }
1174
1175 MSG("");
1176 }
1177
1178end:
1179 free(events);
1180error:
1181 return ret;
1182}
1183
1184/*
1185 * Machine interface
1186 * print a list of event
1187 */
1188static int mi_list_events(struct lttng_event *events, int count)
1189{
1190 int ret, i;
1191
1192 /* Open events element */
1193 ret = mi_lttng_events_open(writer);
1194 if (ret) {
1195 goto end;
1196 }
1197
1198 for (i = 0; i < count; i++) {
1199 ret = mi_lttng_event(writer, &events[i], 0, handle->domain.type);
1200 if (ret) {
1201 goto end;
1202 }
1203 }
1204
1205 /* Close events element */
1206 ret = mi_lttng_writer_close_element(writer);
1207
1208end:
1209 return ret;
1210}
1211
1212/*
1213 * List events of channel of session and domain.
1214 */
1215static int list_events(const char *channel_name)
1216{
1217 int ret = CMD_SUCCESS, count, i;
1218 struct lttng_event *events = NULL;
1219
1220 count = lttng_list_events(handle, channel_name, &events);
1221 if (count < 0) {
1222 ret = CMD_ERROR;
1223 ERR("%s", lttng_strerror(count));
1224 goto error;
1225 }
1226
1227 if (lttng_opt_mi) {
1228 /* Mi print */
1229 ret = mi_list_events(events, count);
1230 if (ret) {
1231 ret = CMD_ERROR;
1232 goto end;
1233 }
1234 } else {
1235 /* Pretty print */
1236 MSG("\n%sEvent rules:", indent4);
1237 if (count == 0) {
1238 MSG("%sNone\n", indent6);
1239 goto end;
1240 }
1241
1242 for (i = 0; i < count; i++) {
1243 print_events(&events[i]);
1244 }
1245
1246 MSG("");
1247 }
1248end:
1249 free(events);
1250error:
1251 return ret;
1252}
1253
1254static
1255void print_timer(const char *timer_name, uint32_t space_count, int64_t value)
1256{
1257 uint32_t i;
1258
1259 _MSG("%s%s:", indent6, timer_name);
1260 for (i = 0; i < space_count; i++) {
1261 _MSG(" ");
1262 }
1263
1264 if (value) {
1265 MSG("%" PRId64 " %s", value, USEC_UNIT);
1266 } else {
1267 MSG("inactive");
1268 }
1269}
1270
1271/*
1272 * Pretty print channel
1273 */
1274static void print_channel(struct lttng_channel *channel)
1275{
1276 int ret;
1277 uint64_t discarded_events, lost_packets, monitor_timer_interval;
1278 int64_t blocking_timeout;
1279
1280 ret = lttng_channel_get_discarded_event_count(channel,
1281 &discarded_events);
1282 if (ret) {
1283 ERR("Failed to retrieve discarded event count of channel");
1284 return;
1285 }
1286
1287 ret = lttng_channel_get_lost_packet_count(channel,
1288 &lost_packets);
1289 if (ret) {
1290 ERR("Failed to retrieve lost packet count of channel");
1291 return;
1292 }
1293
1294 ret = lttng_channel_get_monitor_timer_interval(channel,
1295 &monitor_timer_interval);
1296 if (ret) {
1297 ERR("Failed to retrieve monitor interval of channel");
1298 return;
1299 }
1300
1301 ret = lttng_channel_get_blocking_timeout(channel,
1302 &blocking_timeout);
1303 if (ret) {
1304 ERR("Failed to retrieve blocking timeout of channel");
1305 return;
1306 }
1307
1308 MSG("- %s:%s\n", channel->name, enabled_string(channel->enabled));
1309 MSG("%sAttributes:", indent4);
1310 MSG("%sEvent-loss mode: %s", indent6, channel->attr.overwrite ? "overwrite" : "discard");
1311 MSG("%sSub-buffer size: %" PRIu64 " bytes", indent6, channel->attr.subbuf_size);
1312 MSG("%sSub-buffer count: %" PRIu64, indent6, channel->attr.num_subbuf);
1313
1314 print_timer("Switch timer", 5, channel->attr.switch_timer_interval);
1315 print_timer("Read timer", 7, channel->attr.read_timer_interval);
1316 print_timer("Monitor timer", 4, monitor_timer_interval);
1317
1318 if (!channel->attr.overwrite) {
1319 if (blocking_timeout == -1) {
1320 MSG("%sBlocking timeout: infinite", indent6);
1321 } else {
1322 MSG("%sBlocking timeout: %" PRId64 " %s", indent6,
1323 blocking_timeout, USEC_UNIT);
1324 }
1325 }
1326
1327 MSG("%sTrace file count: %" PRIu64 " per stream", indent6,
1328 channel->attr.tracefile_count == 0 ?
1329 1 : channel->attr.tracefile_count);
1330 if (channel->attr.tracefile_size != 0 ) {
1331 MSG("%sTrace file size: %" PRIu64 " bytes", indent6,
1332 channel->attr.tracefile_size);
1333 } else {
1334 MSG("%sTrace file size: %s", indent6, "unlimited");
1335 }
1336 switch (channel->attr.output) {
1337 case LTTNG_EVENT_SPLICE:
1338 MSG("%sOutput mode: splice", indent6);
1339 break;
1340 case LTTNG_EVENT_MMAP:
1341 MSG("%sOutput mode: mmap", indent6);
1342 break;
1343 }
1344
1345 MSG("\n%sStatistics:", indent4);
1346 if (listed_session.snapshot_mode) {
1347 /*
1348 * The lost packet count is omitted for sessions in snapshot
1349 * mode as it is misleading: it would indicate the number of
1350 * packets that the consumer could not extract during the
1351 * course of recording the snapshot. It does not have the
1352 * same meaning as the "regular" lost packet count that
1353 * would result from the consumer not keeping up with
1354 * event production in an overwrite-mode channel.
1355 *
1356 * A more interesting statistic would be the number of
1357 * packets lost between the first and last extracted
1358 * packets of a given snapshot (which prevents most analyses).
1359 */
1360 MSG("%sNone", indent6);
1361 goto skip_stats_printing;
1362 }
1363
1364 if (!channel->attr.overwrite) {
1365 MSG("%sDiscarded events: %" PRIu64, indent6, discarded_events);
1366 } else {
1367 MSG("%sLost packets: %" PRIu64, indent6, lost_packets);
1368 }
1369skip_stats_printing:
1370 return;
1371}
1372
1373/*
1374 * Machine interface
1375 * Print a list of channel
1376 *
1377 */
1378static int mi_list_channels(struct lttng_channel *channels, int count,
1379 const char *channel_name)
1380{
1381 int i, ret;
1382 unsigned int chan_found = 0;
1383
1384 /* Open channels element */
1385 ret = mi_lttng_channels_open(writer);
1386 if (ret) {
1387 goto error;
1388 }
1389
1390 for (i = 0; i < count; i++) {
1391 if (channel_name != NULL) {
1392 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1393 chan_found = 1;
1394 } else {
1395 continue;
1396 }
1397 }
1398
1399 /* Write channel element and leave it open */
1400 ret = mi_lttng_channel(writer, &channels[i], 1);
1401 if (ret) {
1402 goto error;
1403 }
1404
1405 /* Listing events per channel */
1406 ret = list_events(channels[i].name);
1407 if (ret) {
1408 goto error;
1409 }
1410
1411 /* Closing the channel element we opened earlier */
1412 ret = mi_lttng_writer_close_element(writer);
1413 if (ret) {
1414 goto error;
1415 }
1416
1417 if (chan_found) {
1418 break;
1419 }
1420 }
1421
1422 /* Close channels element */
1423 ret = mi_lttng_writer_close_element(writer);
1424 if (ret) {
1425 goto error;
1426 }
1427
1428error:
1429 return ret;
1430}
1431
1432/*
1433 * List channel(s) of session and domain.
1434 *
1435 * If channel_name is NULL, all channels are listed.
1436 */
1437static int list_channels(const char *channel_name)
1438{
1439 int count, i, ret = CMD_SUCCESS;
1440 unsigned int chan_found = 0;
1441 struct lttng_channel *channels = NULL;
1442
1443 DBG("Listing channel(s) (%s)", channel_name ? : "<all>");
1444
1445 count = lttng_list_channels(handle, &channels);
1446 if (count < 0) {
1447 switch (-count) {
1448 case LTTNG_ERR_KERN_CHAN_NOT_FOUND:
1449 if (lttng_opt_mi) {
1450 /* When printing mi this is not an error
1451 * but an empty channels element */
1452 count = 0;
1453 } else {
1454 ret = CMD_SUCCESS;
1455 WARN("No kernel channel");
1456 goto error_channels;
1457 }
1458 break;
1459 default:
1460 /* We had a real error */
1461 ret = CMD_ERROR;
1462 ERR("%s", lttng_strerror(count));
1463 goto error_channels;
1464 break;
1465 }
1466 }
1467
1468 if (lttng_opt_mi) {
1469 /* Mi print */
1470 ret = mi_list_channels(channels, count, channel_name);
1471 if (ret) {
1472 ret = CMD_ERROR;
1473 goto error;
1474 }
1475 } else {
1476 /* Pretty print */
1477 if (count) {
1478 MSG("Channels:\n-------------");
1479 }
1480
1481 for (i = 0; i < count; i++) {
1482 if (channel_name != NULL) {
1483 if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
1484 chan_found = 1;
1485 } else {
1486 continue;
1487 }
1488 }
1489 print_channel(&channels[i]);
1490
1491 /* Listing events per channel */
1492 ret = list_events(channels[i].name);
1493 if (ret) {
1494 goto error;
1495 }
1496
1497 if (chan_found) {
1498 break;
1499 }
1500 }
1501
1502 if (!chan_found && channel_name != NULL) {
1503 ret = CMD_ERROR;
1504 ERR("Channel %s not found", channel_name);
1505 goto error;
1506 }
1507 }
1508error:
1509 free(channels);
1510
1511error_channels:
1512 return ret;
1513}
1514
1515/*
1516 * List tracker PID(s) of session and domain.
1517 */
1518static int list_tracker_pids(void)
1519{
1520 int ret = 0;
1521 int enabled;
1522 int *pids = NULL;
1523 size_t nr_pids;
1524
1525 ret = lttng_list_tracker_pids(handle,
1526 &enabled, &pids, &nr_pids);
1527 if (ret) {
1528 return ret;
1529 }
1530 if (enabled) {
1531 int i;
1532 _MSG("PID tracker: [");
1533
1534 /* Mi tracker_pid element*/
1535 if (writer) {
1536 /* Open tracker_pid and targets elements */
1537 ret = mi_lttng_pid_tracker_open(writer);
1538 if (ret) {
1539 goto end;
1540 }
1541 }
1542
1543 for (i = 0; i < nr_pids; i++) {
1544 if (i) {
1545 _MSG(",");
1546 }
1547 _MSG(" %d", pids[i]);
1548
1549 /* Mi */
1550 if (writer) {
1551 ret = mi_lttng_pid_target(writer, pids[i], 0);
1552 if (ret) {
1553 goto end;
1554 }
1555 }
1556 }
1557 _MSG(" ]\n\n");
1558
1559 /* Mi close tracker_pid and targets */
1560 if (writer) {
1561 ret = mi_lttng_close_multi_element(writer,2);
1562 if (ret) {
1563 goto end;
1564 }
1565 }
1566 }
1567end:
1568 free(pids);
1569 return ret;
1570
1571}
1572
1573/*
1574 * List all tracker of a domain
1575 */
1576static int list_trackers(void)
1577{
1578 int ret;
1579
1580 /* Trackers listing */
1581 if (lttng_opt_mi) {
1582 ret = mi_lttng_trackers_open(writer);
1583 if (ret) {
1584 goto end;
1585 }
1586 }
1587
1588 /* pid tracker */
1589 ret = list_tracker_pids();
1590 if (ret) {
1591 goto end;
1592 }
1593
1594 if (lttng_opt_mi) {
1595 /* Close trackers element */
1596 ret = mi_lttng_writer_close_element(writer);
1597 if (ret) {
1598 goto end;
1599 }
1600 }
1601
1602end:
1603 return ret;
1604}
1605
1606static enum cmd_error_code print_periodic_rotation_schedule(
1607 const struct lttng_rotation_schedule *schedule)
1608{
1609 enum cmd_error_code ret;
1610 enum lttng_rotation_status status;
1611 uint64_t value;
1612
1613 status = lttng_rotation_schedule_periodic_get_period(schedule,
1614 &value);
1615 if (status != LTTNG_ROTATION_STATUS_OK) {
1616 ERR("Failed to retrieve period parameter from periodic rotation schedule.");
1617 ret = CMD_ERROR;
1618 goto end;
1619 }
1620
1621 MSG(" timer period: %" PRIu64" %s", value, USEC_UNIT);
1622 ret = CMD_SUCCESS;
1623end:
1624 return ret;
1625}
1626
1627static enum cmd_error_code print_size_threshold_rotation_schedule(
1628 const struct lttng_rotation_schedule *schedule)
1629{
1630 enum cmd_error_code ret;
1631 enum lttng_rotation_status status;
1632 uint64_t value;
1633
1634 status = lttng_rotation_schedule_size_threshold_get_threshold(schedule,
1635 &value);
1636 if (status != LTTNG_ROTATION_STATUS_OK) {
1637 ERR("Failed to retrieve size parameter from size-based rotation schedule.");
1638 ret = CMD_ERROR;
1639 goto end;
1640 }
1641
1642 MSG(" size threshold: %" PRIu64" bytes", value);
1643 ret = CMD_SUCCESS;
1644end:
1645 return ret;
1646}
1647
1648static enum cmd_error_code print_rotation_schedule(
1649 const struct lttng_rotation_schedule *schedule)
1650{
1651 enum cmd_error_code ret;
1652
1653 switch (lttng_rotation_schedule_get_type(schedule)) {
1654 case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD:
1655 ret = print_size_threshold_rotation_schedule(schedule);
1656 break;
1657 case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC:
1658 ret = print_periodic_rotation_schedule(schedule);
1659 break;
1660 default:
1661 ret = CMD_ERROR;
1662 }
1663 return ret;
1664}
1665
1666/*
1667 * List the automatic rotation settings.
1668 */
1669static enum cmd_error_code list_rotate_settings(const char *session_name)
1670{
1671 int ret;
1672 enum cmd_error_code cmd_ret = CMD_SUCCESS;
1673 unsigned int count, i;
1674 struct lttng_rotation_schedules *schedules = NULL;
1675 enum lttng_rotation_status status;
1676
1677 ret = lttng_session_list_rotation_schedules(session_name, &schedules);
1678 if (ret != LTTNG_OK) {
1679 ERR("Failed to list session rotation schedules: %s", lttng_strerror(ret));
1680 cmd_ret = CMD_ERROR;
1681 goto end;
1682 }
1683
1684 status = lttng_rotation_schedules_get_count(schedules, &count);
1685 if (status != LTTNG_ROTATION_STATUS_OK) {
1686 ERR("Failed to retrieve the number of session rotation schedules.");
1687 cmd_ret = CMD_ERROR;
1688 goto end;
1689 }
1690
1691 if (count == 0) {
1692 cmd_ret = CMD_SUCCESS;
1693 goto end;
1694 }
1695
1696 MSG("Automatic rotation schedules:");
1697 if (lttng_opt_mi) {
1698 ret = mi_lttng_writer_open_element(writer,
1699 mi_lttng_element_rotation_schedules);
1700 if (ret) {
1701 cmd_ret = CMD_ERROR;
1702 goto end;
1703 }
1704 }
1705
1706 for (i = 0; i < count; i++) {
1707 enum cmd_error_code tmp_ret = CMD_SUCCESS;
1708 const struct lttng_rotation_schedule *schedule;
1709
1710 schedule = lttng_rotation_schedules_get_at_index(schedules, i);
1711 if (!schedule) {
1712 ERR("Failed to retrieve session rotation schedule.");
1713 cmd_ret = CMD_ERROR;
1714 goto end;
1715 }
1716
1717 if (lttng_opt_mi) {
1718 ret = mi_lttng_rotation_schedule(writer, schedule);
1719 if (ret) {
1720 tmp_ret = CMD_ERROR;
1721 }
1722 } else {
1723 tmp_ret = print_rotation_schedule(schedule);
1724 }
1725
1726 /*
1727 * Report an error if the serialization of any of the
1728 * descriptors failed.
1729 */
1730 cmd_ret = cmd_ret ? cmd_ret : tmp_ret;
1731 }
1732
1733 _MSG("\n");
1734 if (lttng_opt_mi) {
1735 /* Close the rotation_schedules element. */
1736 ret = mi_lttng_writer_close_element(writer);
1737 if (ret) {
1738 cmd_ret = CMD_ERROR;
1739 goto end;
1740 }
1741 }
1742end:
1743 lttng_rotation_schedules_destroy(schedules);
1744 return cmd_ret;
1745}
1746
1747/*
1748 * Machine interface
1749 * Find the session with session_name as name
1750 * and print his informations.
1751 */
1752static int mi_list_session(const char *session_name,
1753 struct lttng_session *sessions, int count)
1754{
1755 int ret, i;
1756 unsigned int session_found = 0;
1757
1758 if (session_name == NULL) {
1759 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1760 goto end;
1761 }
1762
1763 for (i = 0; i < count; i++) {
1764 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1765 /* We need to leave it open to append other informations
1766 * like domain, channel, events etc.*/
1767 session_found = 1;
1768 ret = mi_lttng_session(writer, &sessions[i], 1);
1769 if (ret) {
1770 goto end;
1771 }
1772 break;
1773 }
1774 }
1775
1776 if (!session_found) {
1777 ERR("Session '%s' not found", session_name);
1778 ret = -LTTNG_ERR_SESS_NOT_FOUND;
1779 goto end;
1780 }
1781
1782end:
1783 return ret;
1784}
1785
1786/*
1787 * Machine interface
1788 * List all availables session
1789 */
1790static int mi_list_sessions(struct lttng_session *sessions, int count)
1791{
1792 int ret, i;
1793
1794 /* Opening sessions element */
1795 ret = mi_lttng_sessions_open(writer);
1796 if (ret) {
1797 goto end;
1798 }
1799
1800 /* Listing sessions */
1801 for (i = 0; i < count; i++) {
1802 ret = mi_lttng_session(writer, &sessions[i], 0);
1803 if (ret) {
1804 goto end;
1805 }
1806 }
1807
1808 /* Closing sessions element */
1809 ret = mi_lttng_writer_close_element(writer);
1810 if (ret) {
1811 goto end;
1812 }
1813
1814end:
1815 return ret;
1816}
1817
1818/*
1819 * List available tracing session. List only basic information.
1820 *
1821 * If session_name is NULL, all sessions are listed.
1822 */
1823static int list_sessions(const char *session_name)
1824{
1825 int ret = CMD_SUCCESS;
1826 int count, i;
1827 unsigned int session_found = 0;
1828 struct lttng_session *sessions = NULL;
1829
1830 count = lttng_list_sessions(&sessions);
1831 DBG("Session count %d", count);
1832 if (count < 0) {
1833 ret = CMD_ERROR;
1834 ERR("%s", lttng_strerror(count));
1835 goto end;
1836 }
1837
1838 if (lttng_opt_mi) {
1839 /* Mi */
1840 if (session_name == NULL) {
1841 /* List all sessions */
1842 ret = mi_list_sessions(sessions, count);
1843 } else {
1844 /* Note : this return an open session element */
1845 ret = mi_list_session(session_name, sessions, count);
1846 }
1847 if (ret) {
1848 ret = CMD_ERROR;
1849 goto end;
1850 }
1851 } else {
1852 /* Pretty print */
1853 if (count == 0) {
1854 MSG("Currently no available tracing session");
1855 goto end;
1856 }
1857
1858 if (session_name == NULL) {
1859 MSG("Available tracing sessions:");
1860 }
1861
1862 for (i = 0; i < count; i++) {
1863 if (session_name != NULL) {
1864 if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
1865 session_found = 1;
1866 MSG("Tracing session %s: [%s%s]", session_name,
1867 active_string(sessions[i].enabled),
1868 snapshot_string(sessions[i].snapshot_mode));
1869 if (*sessions[i].path) {
1870 MSG("%sTrace output: %s\n", indent4, sessions[i].path);
1871 }
1872 memcpy(&listed_session, &sessions[i],
1873 sizeof(listed_session));
1874 break;
1875 }
1876 } else {
1877 MSG(" %d) %s [%s%s]", i + 1,
1878 sessions[i].name,
1879 active_string(sessions[i].enabled),
1880 snapshot_string(sessions[i].snapshot_mode));
1881 if (*sessions[i].path) {
1882 MSG("%sTrace output: %s", indent4, sessions[i].path);
1883 }
1884 if (sessions[i].live_timer_interval != 0) {
1885 MSG("%sLive timer interval: %u %s", indent4,
1886 sessions[i].live_timer_interval,
1887 USEC_UNIT);
1888 }
1889 MSG("");
1890 }
1891 }
1892
1893 if (!session_found && session_name != NULL) {
1894 ERR("Session '%s' not found", session_name);
1895 ret = CMD_ERROR;
1896 goto end;
1897 }
1898
1899 if (session_name == NULL) {
1900 MSG("\nUse lttng list <session_name> for more details");
1901 }
1902 }
1903
1904end:
1905 free(sessions);
1906 return ret;
1907}
1908
1909
1910/*
1911 * Machine Interface
1912 * list available domain(s) for a session.
1913 */
1914static int mi_list_domains(struct lttng_domain *domains, int count)
1915{
1916 int i, ret;
1917 /* Open domains element */
1918 ret = mi_lttng_domains_open(writer);
1919 if (ret) {
1920 goto end;
1921 }
1922
1923 for (i = 0; i < count; i++) {
1924 ret = mi_lttng_domain(writer, &domains[i] , 0);
1925 if (ret) {
1926 goto end;
1927 }
1928 }
1929
1930 /* Closing domains element */
1931 ret = mi_lttng_writer_close_element(writer);
1932 if (ret) {
1933 goto end;
1934 }
1935end:
1936 return ret;
1937}
1938
1939/*
1940 * List available domain(s) for a session.
1941 */
1942static int list_domains(const char *session_name)
1943{
1944 int i, count, ret = CMD_SUCCESS;
1945 struct lttng_domain *domains = NULL;
1946
1947
1948 count = lttng_list_domains(session_name, &domains);
1949 if (count < 0) {
1950 ret = CMD_ERROR;
1951 ERR("%s", lttng_strerror(count));
1952 goto end;
1953 }
1954
1955 if (lttng_opt_mi) {
1956 /* Mi output */
1957 ret = mi_list_domains(domains, count);
1958 if (ret) {
1959 ret = CMD_ERROR;
1960 goto error;
1961 }
1962 } else {
1963 /* Pretty print */
1964 MSG("Domains:\n-------------");
1965 if (count == 0) {
1966 MSG(" None");
1967 goto end;
1968 }
1969
1970 for (i = 0; i < count; i++) {
1971 switch (domains[i].type) {
1972 case LTTNG_DOMAIN_KERNEL:
1973 MSG(" - Kernel");
1974 break;
1975 case LTTNG_DOMAIN_UST:
1976 MSG(" - UST global");
1977 break;
1978 case LTTNG_DOMAIN_JUL:
1979 MSG(" - JUL (Java Util Logging)");
1980 break;
1981 case LTTNG_DOMAIN_LOG4J:
1982 MSG(" - LOG4j (Logging for Java)");
1983 break;
1984 case LTTNG_DOMAIN_PYTHON:
1985 MSG(" - Python (logging)");
1986 break;
1987 default:
1988 break;
1989 }
1990 }
1991 }
1992
1993error:
1994 free(domains);
1995
1996end:
1997 return ret;
1998}
1999
2000/*
2001 * The 'list <options>' first level command
2002 */
2003int cmd_list(int argc, const char **argv)
2004{
2005 int opt, ret = CMD_SUCCESS;
2006 const char *session_name, *leftover = NULL;
2007 static poptContext pc;
2008 struct lttng_domain domain;
2009 struct lttng_domain *domains = NULL;
2010
2011 memset(&domain, 0, sizeof(domain));
2012
2013 if (argc < 1) {
2014 ret = CMD_ERROR;
2015 goto end;
2016 }
2017
2018 pc = poptGetContext(NULL, argc, argv, long_options, 0);
2019 poptReadDefaultConfig(pc, 0);
2020
2021 while ((opt = poptGetNextOpt(pc)) != -1) {
2022 switch (opt) {
2023 case OPT_HELP:
2024 SHOW_HELP();
2025 goto end;
2026 case OPT_USERSPACE:
2027 opt_userspace = 1;
2028 break;
2029 case OPT_LIST_OPTIONS:
2030 list_cmd_options(stdout, long_options);
2031 goto end;
2032 default:
2033 ret = CMD_UNDEFINED;
2034 goto end;
2035 }
2036 }
2037
2038 /* Mi check */
2039 if (lttng_opt_mi) {
2040 writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
2041 if (!writer) {
2042 ret = CMD_ERROR;
2043 goto end;
2044 }
2045
2046 /* Open command element */
2047 ret = mi_lttng_writer_command_open(writer,
2048 mi_lttng_element_command_list);
2049 if (ret) {
2050 ret = CMD_ERROR;
2051 goto end;
2052 }
2053
2054 /* Open output element */
2055 ret = mi_lttng_writer_open_element(writer,
2056 mi_lttng_element_command_output);
2057 if (ret) {
2058 ret = CMD_ERROR;
2059 goto end;
2060 }
2061 }
2062
2063 /* Get session name (trailing argument) */
2064 session_name = poptGetArg(pc);
2065 DBG2("Session name: %s", session_name);
2066
2067 leftover = poptGetArg(pc);
2068 if (leftover) {
2069 ERR("Unknown argument: %s", leftover);
2070 ret = CMD_ERROR;
2071 goto end;
2072 }
2073
2074 if (opt_kernel) {
2075 domain.type = LTTNG_DOMAIN_KERNEL;
2076 } else if (opt_userspace) {
2077 DBG2("Listing userspace global domain");
2078 domain.type = LTTNG_DOMAIN_UST;
2079 } else if (opt_jul) {
2080 DBG2("Listing JUL domain");
2081 domain.type = LTTNG_DOMAIN_JUL;
2082 } else if (opt_log4j) {
2083 domain.type = LTTNG_DOMAIN_LOG4J;
2084 } else if (opt_python) {
2085 domain.type = LTTNG_DOMAIN_PYTHON;
2086 }
2087
2088 if (!opt_kernel && opt_syscall) {
2089 WARN("--syscall will only work with the Kernel domain (-k)");
2090 ret = CMD_ERROR;
2091 goto end;
2092 }
2093
2094 if (opt_kernel || opt_userspace || opt_jul || opt_log4j || opt_python) {
2095 handle = lttng_create_handle(session_name, &domain);
2096 if (handle == NULL) {
2097 ret = CMD_FATAL;
2098 goto end;
2099 }
2100 }
2101
2102 if (session_name == NULL) {
2103 if (!opt_kernel && !opt_userspace && !opt_jul && !opt_log4j
2104 && !opt_python) {
2105 ret = list_sessions(NULL);
2106 if (ret) {
2107 goto end;
2108 }
2109 }
2110 if (opt_kernel) {
2111 if (opt_syscall) {
2112 ret = list_syscalls();
2113 if (ret) {
2114 goto end;
2115 }
2116 } else {
2117 ret = list_kernel_events();
2118 if (ret) {
2119 goto end;
2120 }
2121 }
2122 }
2123 if (opt_userspace) {
2124 if (opt_fields) {
2125 ret = list_ust_event_fields();
2126 } else {
2127 ret = list_ust_events();
2128 }
2129 if (ret) {
2130 goto end;
2131 }
2132 }
2133 if (opt_jul || opt_log4j || opt_python) {
2134 ret = list_agent_events();
2135 if (ret) {
2136 goto end;
2137 }
2138 }
2139 } else {
2140 /* List session attributes */
2141 if (lttng_opt_mi) {
2142 /* Open element sessions
2143 * Present for xml consistency */
2144 ret = mi_lttng_sessions_open(writer);
2145 if (ret) {
2146 goto end;
2147 }
2148 }
2149 /* MI: the ouptut of list_sessions is an unclosed session element */
2150 ret = list_sessions(session_name);
2151 if (ret) {
2152 goto end;
2153 }
2154
2155 ret = list_rotate_settings(session_name);
2156 if (ret) {
2157 goto end;
2158 }
2159
2160 /* Domain listing */
2161 if (opt_domain) {
2162 ret = list_domains(session_name);
2163 goto end;
2164 }
2165
2166 /* Channel listing */
2167 if (opt_kernel || opt_userspace) {
2168 if (lttng_opt_mi) {
2169 /* Add of domains and domain element for xml
2170 * consistency and validation
2171 */
2172 ret = mi_lttng_domains_open(writer);
2173 if (ret) {
2174 goto end;
2175 }
2176
2177 /* Open domain and leave it open for
2178 * nested channels printing */
2179 ret = mi_lttng_domain(writer, &domain, 1);
2180 if (ret) {
2181 goto end;
2182 }
2183
2184 }
2185
2186
2187 /* Trackers */
2188 ret = list_trackers();
2189 if (ret) {
2190 goto end;
2191 }
2192
2193 /* Channels */
2194 ret = list_channels(opt_channel);
2195 if (ret) {
2196 goto end;
2197 }
2198
2199 if (lttng_opt_mi) {
2200 /* Close domain and domain element */
2201 ret = mi_lttng_close_multi_element(writer, 2);
2202 }
2203 if (ret) {
2204 goto end;
2205 }
2206
2207
2208 } else {
2209 int i, nb_domain;
2210
2211 /* We want all domain(s) */
2212 nb_domain = lttng_list_domains(session_name, &domains);
2213 if (nb_domain < 0) {
2214 ret = CMD_ERROR;
2215 ERR("%s", lttng_strerror(nb_domain));
2216 goto end;
2217 }
2218
2219 if (lttng_opt_mi) {
2220 ret = mi_lttng_domains_open(writer);
2221 if (ret) {
2222 ret = CMD_ERROR;
2223 goto end;
2224 }
2225 }
2226
2227 for (i = 0; i < nb_domain; i++) {
2228 switch (domains[i].type) {
2229 case LTTNG_DOMAIN_KERNEL:
2230 MSG("=== Domain: Kernel ===\n");
2231 break;
2232 case LTTNG_DOMAIN_UST:
2233 MSG("=== Domain: UST global ===\n");
2234 MSG("Buffer type: %s\n",
2235 domains[i].buf_type ==
2236 LTTNG_BUFFER_PER_PID ? "per PID" : "per UID");
2237 break;
2238 case LTTNG_DOMAIN_JUL:
2239 MSG("=== Domain: JUL (Java Util Logging) ===\n");
2240 break;
2241 case LTTNG_DOMAIN_LOG4J:
2242 MSG("=== Domain: LOG4j (Logging for Java) ===\n");
2243 break;
2244 case LTTNG_DOMAIN_PYTHON:
2245 MSG("=== Domain: Python (logging) ===\n");
2246 break;
2247 default:
2248 MSG("=== Domain: Unimplemented ===\n");
2249 break;
2250 }
2251
2252 if (lttng_opt_mi) {
2253 ret = mi_lttng_domain(writer, &domains[i], 1);
2254 if (ret) {
2255 ret = CMD_ERROR;
2256 goto end;
2257 }
2258 }
2259
2260 /* Clean handle before creating a new one */
2261 if (handle) {
2262 lttng_destroy_handle(handle);
2263 }
2264
2265 handle = lttng_create_handle(session_name, &domains[i]);
2266 if (handle == NULL) {
2267 ret = CMD_FATAL;
2268 goto end;
2269 }
2270
2271 if (domains[i].type == LTTNG_DOMAIN_JUL ||
2272 domains[i].type == LTTNG_DOMAIN_LOG4J ||
2273 domains[i].type == LTTNG_DOMAIN_PYTHON) {
2274 ret = list_session_agent_events();
2275 if (ret) {
2276 goto end;
2277 }
2278
2279 goto next_domain;
2280 }
2281
2282 switch (domains[i].type) {
2283 case LTTNG_DOMAIN_KERNEL:
2284 case LTTNG_DOMAIN_UST:
2285 ret = list_trackers();
2286 if (ret) {
2287 goto end;
2288 }
2289 break;
2290 default:
2291 break;
2292 }
2293
2294 ret = list_channels(opt_channel);
2295 if (ret) {
2296 goto end;
2297 }
2298
2299next_domain:
2300 if (lttng_opt_mi) {
2301 /* Close domain element */
2302 ret = mi_lttng_writer_close_element(writer);
2303 if (ret) {
2304 ret = CMD_ERROR;
2305 goto end;
2306 }
2307 }
2308
2309 }
2310 if (lttng_opt_mi) {
2311 /* Close the domains, session and sessions element */
2312 ret = mi_lttng_close_multi_element(writer, 3);
2313 if (ret) {
2314 ret = CMD_ERROR;
2315 goto end;
2316 }
2317 }
2318 }
2319 }
2320
2321 /* Mi closing */
2322 if (lttng_opt_mi) {
2323 /* Close output element */
2324 ret = mi_lttng_writer_close_element(writer);
2325 if (ret) {
2326 ret = CMD_ERROR;
2327 goto end;
2328 }
2329
2330 /* Command element close */
2331 ret = mi_lttng_writer_command_close(writer);
2332 if (ret) {
2333 ret = CMD_ERROR;
2334 goto end;
2335 }
2336 }
2337end:
2338 /* Mi clean-up */
2339 if (writer && mi_lttng_writer_destroy(writer)) {
2340 /* Preserve original error code */
2341 ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
2342 }
2343
2344 free(domains);
2345 if (handle) {
2346 lttng_destroy_handle(handle);
2347 }
2348
2349 poptFreeContext(pc);
2350 return ret;
2351}
LTTng 2.0 tools and control repository
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