Tests: add placeholder symbol to allow unit tests to link
[lttng-tools.git] / src / lib / lttng-ctl / lttng-ctl.c
CommitLineData
826d496d 1/*
82a3637f
DG
2 * liblttngctl.c
3 *
4 * Linux Trace Toolkit Control Library
5 *
826d496d 6 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
2001793c 7 * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
fac6795d 8 *
d14d33bf
AM
9 * This library is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License, version 2.1 only,
11 * as published by the Free Software Foundation.
82a3637f
DG
12 *
13 * This library is distributed in the hope that it will be useful,
fac6795d 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
82a3637f
DG
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
d14d33bf
AM
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this library; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
fac6795d
DG
21 */
22
6c1c0768 23#define _LGPL_SOURCE
44a5e5eb 24#include <assert.h>
fac6795d 25#include <grp.h>
1e307fab 26#include <errno.h>
fac6795d
DG
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#include <unistd.h>
31
990570ed
DG
32#include <common/common.h>
33#include <common/defaults.h>
db758600 34#include <common/sessiond-comm/sessiond-comm.h>
a4b92340 35#include <common/uri.h>
feb0f3e5 36#include <common/utils.h>
1e307fab 37#include <lttng/lttng.h>
0c89d795 38#include <lttng/health-internal.h>
a58c490f
JG
39#include <lttng/trigger/trigger-internal.h>
40#include <lttng/endpoint.h>
41#include <lttng/channel-internal.h>
fac6795d 42
d00c599e
DG
43#include "filter/filter-ast.h"
44#include "filter/filter-parser.h"
45#include "filter/filter-bytecode.h"
46#include "filter/memstream.h"
cac3069d 47#include "lttng-ctl-helper.h"
53a80697
MD
48
49#ifdef DEBUG
d00c599e 50static const int print_xml = 1;
53a80697
MD
51#define dbg_printf(fmt, args...) \
52 printf("[debug liblttng-ctl] " fmt, ## args)
53#else
d00c599e 54static const int print_xml = 0;
53a80697
MD
55#define dbg_printf(fmt, args...) \
56do { \
57 /* do nothing but check printf format */ \
58 if (0) \
59 printf("[debug liblttnctl] " fmt, ## args); \
60} while (0)
61#endif
62
63
fac6795d
DG
64/* Socket to session daemon for communication */
65static int sessiond_socket;
66static char sessiond_sock_path[PATH_MAX];
67
fac6795d
DG
68/* Variables */
69static char *tracing_group;
70static int connected;
71
97e19046
DG
72/* Global */
73
74/*
75 * Those two variables are used by error.h to silent or control the verbosity of
76 * error message. They are global to the library so application linking with it
77 * are able to compile correctly and also control verbosity of the library.
97e19046
DG
78 */
79int lttng_opt_quiet;
80int lttng_opt_verbose;
c7e35b03 81int lttng_opt_mi;
97e19046 82
99497cd0
MD
83/*
84 * Copy string from src to dst and enforce null terminated byte.
85 */
cac3069d
DG
86LTTNG_HIDDEN
87void lttng_ctl_copy_string(char *dst, const char *src, size_t len)
99497cd0 88{
e7d6716d 89 if (src && dst) {
99497cd0
MD
90 strncpy(dst, src, len);
91 /* Enforce the NULL terminated byte */
92 dst[len - 1] = '\0';
cd80958d
DG
93 } else if (dst) {
94 dst[0] = '\0';
99497cd0
MD
95 }
96}
97
fac6795d 98/*
cd80958d 99 * Copy domain to lttcomm_session_msg domain.
fac6795d 100 *
cd80958d
DG
101 * If domain is unknown, default domain will be the kernel.
102 */
cac3069d
DG
103LTTNG_HIDDEN
104void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst,
105 struct lttng_domain *src)
cd80958d
DG
106{
107 if (src && dst) {
108 switch (src->type) {
00e2e675
DG
109 case LTTNG_DOMAIN_KERNEL:
110 case LTTNG_DOMAIN_UST:
b9dfb167 111 case LTTNG_DOMAIN_JUL:
5cdb6027 112 case LTTNG_DOMAIN_LOG4J:
0e115563 113 case LTTNG_DOMAIN_PYTHON:
00e2e675
DG
114 memcpy(dst, src, sizeof(struct lttng_domain));
115 break;
116 default:
117 memset(dst, 0, sizeof(struct lttng_domain));
00e2e675 118 break;
cd80958d
DG
119 }
120 }
121}
122
123/*
124 * Send lttcomm_session_msg to the session daemon.
fac6795d 125 *
1c8d13c8
TD
126 * On success, returns the number of bytes sent (>=0)
127 * On error, returns -1
fac6795d 128 */
cd80958d 129static int send_session_msg(struct lttcomm_session_msg *lsm)
fac6795d
DG
130{
131 int ret;
132
133 if (!connected) {
2f70b271 134 ret = -LTTNG_ERR_NO_SESSIOND;
e065084a 135 goto end;
fac6795d
DG
136 }
137
a4b92340
DG
138 DBG("LSM cmd type : %d", lsm->cmd_type);
139
be040666 140 ret = lttcomm_send_creds_unix_sock(sessiond_socket, lsm,
cd80958d 141 sizeof(struct lttcomm_session_msg));
2f70b271
DG
142 if (ret < 0) {
143 ret = -LTTNG_ERR_FATAL;
144 }
e065084a
DG
145
146end:
147 return ret;
148}
149
53a80697
MD
150/*
151 * Send var len data to the session daemon.
152 *
153 * On success, returns the number of bytes sent (>=0)
154 * On error, returns -1
155 */
c2d69327 156static int send_session_varlen(const void *data, size_t len)
53a80697
MD
157{
158 int ret;
159
160 if (!connected) {
2f70b271 161 ret = -LTTNG_ERR_NO_SESSIOND;
53a80697
MD
162 goto end;
163 }
a4b92340 164
53a80697
MD
165 if (!data || !len) {
166 ret = 0;
167 goto end;
168 }
169
170 ret = lttcomm_send_unix_sock(sessiond_socket, data, len);
2f70b271
DG
171 if (ret < 0) {
172 ret = -LTTNG_ERR_FATAL;
173 }
53a80697
MD
174
175end:
176 return ret;
177}
178
e065084a 179/*
cd80958d 180 * Receive data from the sessiond socket.
e065084a 181 *
1c8d13c8
TD
182 * On success, returns the number of bytes received (>=0)
183 * On error, returns -1 (recvmsg() error) or -ENOTCONN
e065084a 184 */
ca95a216 185static int recv_data_sessiond(void *buf, size_t len)
e065084a
DG
186{
187 int ret;
188
189 if (!connected) {
2f70b271 190 ret = -LTTNG_ERR_NO_SESSIOND;
e065084a 191 goto end;
fac6795d
DG
192 }
193
ca95a216 194 ret = lttcomm_recv_unix_sock(sessiond_socket, buf, len);
2f70b271
DG
195 if (ret < 0) {
196 ret = -LTTNG_ERR_FATAL;
197 }
fac6795d 198
e065084a 199end:
fac6795d
DG
200 return ret;
201}
202
203/*
9ae110e2 204 * Check if we are in the specified group.
65beb5ff 205 *
9ae110e2 206 * If yes return 1, else return -1.
947308c4 207 */
6c71277b
MD
208LTTNG_HIDDEN
209int lttng_check_tracing_group(void)
947308c4
DG
210{
211 struct group *grp_tracing; /* no free(). See getgrnam(3) */
212 gid_t *grp_list;
213 int grp_list_size, grp_id, i;
214 int ret = -1;
6c71277b 215 const char *grp_name = tracing_group;
947308c4
DG
216
217 /* Get GID of group 'tracing' */
218 grp_tracing = getgrnam(grp_name);
b4d8603b
MD
219 if (!grp_tracing) {
220 /* If grp_tracing is NULL, the group does not exist. */
947308c4
DG
221 goto end;
222 }
223
224 /* Get number of supplementary group IDs */
225 grp_list_size = getgroups(0, NULL);
226 if (grp_list_size < 0) {
6f04ed72 227 PERROR("getgroups");
947308c4
DG
228 goto end;
229 }
230
231 /* Alloc group list of the right size */
3f451dc0 232 grp_list = zmalloc(grp_list_size * sizeof(gid_t));
00795392 233 if (!grp_list) {
6f04ed72 234 PERROR("malloc");
00795392
MD
235 goto end;
236 }
947308c4 237 grp_id = getgroups(grp_list_size, grp_list);
1c8d13c8 238 if (grp_id < 0) {
6f04ed72 239 PERROR("getgroups");
947308c4
DG
240 goto free_list;
241 }
242
243 for (i = 0; i < grp_list_size; i++) {
244 if (grp_list[i] == grp_tracing->gr_gid) {
2269e89e 245 ret = 1;
947308c4
DG
246 break;
247 }
248 }
249
250free_list:
251 free(grp_list);
252
253end:
254 return ret;
255}
256
257/*
2269e89e
DG
258 * Try connect to session daemon with sock_path.
259 *
260 * Return 0 on success, else -1
261 */
262static int try_connect_sessiond(const char *sock_path)
263{
264 int ret;
265
266 /* If socket exist, we check if the daemon listens for connect. */
267 ret = access(sock_path, F_OK);
268 if (ret < 0) {
269 /* Not alive */
2f70b271 270 goto error;
2269e89e
DG
271 }
272
273 ret = lttcomm_connect_unix_sock(sock_path);
274 if (ret < 0) {
9ae110e2 275 /* Not alive. */
2f70b271 276 goto error;
2269e89e
DG
277 }
278
279 ret = lttcomm_close_unix_sock(ret);
280 if (ret < 0) {
6f04ed72 281 PERROR("lttcomm_close_unix_sock");
2269e89e
DG
282 }
283
284 return 0;
2f70b271
DG
285
286error:
287 return -1;
2269e89e
DG
288}
289
290/*
2f70b271
DG
291 * Set sessiond socket path by putting it in the global sessiond_sock_path
292 * variable.
293 *
294 * Returns 0 on success, negative value on failure (the sessiond socket path
295 * is somehow too long or ENOMEM).
947308c4
DG
296 */
297static int set_session_daemon_path(void)
298{
9ae110e2 299 int in_tgroup = 0; /* In tracing group. */
2269e89e
DG
300 uid_t uid;
301
302 uid = getuid();
947308c4 303
2269e89e
DG
304 if (uid != 0) {
305 /* Are we in the tracing group ? */
6c71277b 306 in_tgroup = lttng_check_tracing_group();
2269e89e
DG
307 }
308
08a9c49f 309 if ((uid == 0) || in_tgroup) {
cac3069d
DG
310 lttng_ctl_copy_string(sessiond_sock_path,
311 DEFAULT_GLOBAL_CLIENT_UNIX_SOCK, sizeof(sessiond_sock_path));
08a9c49f 312 }
2269e89e 313
08a9c49f 314 if (uid != 0) {
c617c0c6
MD
315 int ret;
316
08a9c49f 317 if (in_tgroup) {
9ae110e2 318 /* Tracing group. */
08a9c49f
TD
319 ret = try_connect_sessiond(sessiond_sock_path);
320 if (ret >= 0) {
321 goto end;
2269e89e 322 }
08a9c49f 323 /* Global session daemon not available... */
2269e89e 324 }
08a9c49f
TD
325 /* ...or not in tracing group (and not root), default */
326
327 /*
9ae110e2
JG
328 * With GNU C < 2.1, snprintf returns -1 if the target buffer
329 * is too small;
330 * With GNU C >= 2.1, snprintf returns the required size
331 * (excluding closing null)
08a9c49f
TD
332 */
333 ret = snprintf(sessiond_sock_path, sizeof(sessiond_sock_path),
feb0f3e5 334 DEFAULT_HOME_CLIENT_UNIX_SOCK, utils_get_home_dir());
08a9c49f 335 if ((ret < 0) || (ret >= sizeof(sessiond_sock_path))) {
2f70b271 336 goto error;
947308c4 337 }
947308c4 338 }
08a9c49f 339end:
947308c4 340 return 0;
2f70b271
DG
341
342error:
343 return -1;
947308c4
DG
344}
345
65beb5ff 346/*
9ae110e2 347 * Connect to the LTTng session daemon.
65beb5ff 348 *
9ae110e2 349 * On success, return 0. On error, return -1.
65beb5ff
DG
350 */
351static int connect_sessiond(void)
352{
353 int ret;
354
da3c9ec1
DG
355 /* Don't try to connect if already connected. */
356 if (connected) {
357 return 0;
358 }
359
65beb5ff
DG
360 ret = set_session_daemon_path();
361 if (ret < 0) {
2f70b271 362 goto error;
65beb5ff
DG
363 }
364
9ae110e2 365 /* Connect to the sesssion daemon. */
65beb5ff
DG
366 ret = lttcomm_connect_unix_sock(sessiond_sock_path);
367 if (ret < 0) {
2f70b271 368 goto error;
65beb5ff
DG
369 }
370
371 sessiond_socket = ret;
372 connected = 1;
373
374 return 0;
2f70b271
DG
375
376error:
377 return -1;
65beb5ff
DG
378}
379
380/*
1c8d13c8 381 * Clean disconnect from the session daemon.
9ae110e2 382 *
1c8d13c8 383 * On success, return 0. On error, return -1.
65beb5ff
DG
384 */
385static int disconnect_sessiond(void)
386{
387 int ret = 0;
388
389 if (connected) {
390 ret = lttcomm_close_unix_sock(sessiond_socket);
391 sessiond_socket = 0;
392 connected = 0;
393 }
394
395 return ret;
396}
397
795a978d
PP
398static int recv_sessiond_optional_data(size_t len, void **user_buf,
399 size_t *user_len)
400{
401 int ret = 0;
402 void *buf = NULL;
403
404 if (len) {
405 if (!user_len) {
406 ret = -LTTNG_ERR_INVALID;
407 goto end;
408 }
409
410 buf = zmalloc(len);
411 if (!buf) {
412 ret = -ENOMEM;
413 goto end;
414 }
415
416 ret = recv_data_sessiond(buf, len);
417 if (ret < 0) {
418 goto end;
419 }
420
421 if (!user_buf) {
422 ret = -LTTNG_ERR_INVALID;
423 goto end;
424 }
425
426 /* Move ownership of command header buffer to user. */
427 *user_buf = buf;
428 buf = NULL;
429 *user_len = len;
430 } else {
431 /* No command header. */
432 if (user_len) {
433 *user_len = 0;
434 }
435
436 if (user_buf) {
437 *user_buf = NULL;
438 }
439 }
440
441end:
442 free(buf);
443 return ret;
444}
445
35a6fdb7 446/*
cd80958d 447 * Ask the session daemon a specific command and put the data into buf.
53a80697 448 * Takes extra var. len. data as input to send to the session daemon.
65beb5ff 449 *
af87c45a 450 * Return size of data (only payload, not header) or a negative error code.
65beb5ff 451 */
cac3069d
DG
452LTTNG_HIDDEN
453int lttng_ctl_ask_sessiond_varlen(struct lttcomm_session_msg *lsm,
795a978d
PP
454 const void *vardata, size_t vardata_len,
455 void **user_payload_buf, void **user_cmd_header_buf,
456 size_t *user_cmd_header_len)
65beb5ff
DG
457{
458 int ret;
795a978d 459 size_t payload_len;
cd80958d 460 struct lttcomm_lttng_msg llm;
65beb5ff
DG
461
462 ret = connect_sessiond();
463 if (ret < 0) {
2f70b271 464 ret = -LTTNG_ERR_NO_SESSIOND;
65beb5ff
DG
465 goto end;
466 }
467
65beb5ff 468 /* Send command to session daemon */
cd80958d 469 ret = send_session_msg(lsm);
65beb5ff 470 if (ret < 0) {
2f70b271 471 /* Ret value is a valid lttng error code. */
65beb5ff
DG
472 goto end;
473 }
53a80697 474 /* Send var len data */
795a978d 475 ret = send_session_varlen(vardata, vardata_len);
53a80697 476 if (ret < 0) {
2f70b271 477 /* Ret value is a valid lttng error code. */
53a80697
MD
478 goto end;
479 }
65beb5ff
DG
480
481 /* Get header from data transmission */
482 ret = recv_data_sessiond(&llm, sizeof(llm));
483 if (ret < 0) {
2f70b271 484 /* Ret value is a valid lttng error code. */
65beb5ff
DG
485 goto end;
486 }
487
488 /* Check error code if OK */
f73fabfd 489 if (llm.ret_code != LTTNG_OK) {
65beb5ff
DG
490 ret = -llm.ret_code;
491 goto end;
492 }
493
795a978d
PP
494 /* Get command header from data transmission */
495 ret = recv_sessiond_optional_data(llm.cmd_header_size,
496 user_cmd_header_buf, user_cmd_header_len);
65beb5ff 497 if (ret < 0) {
65beb5ff
DG
498 goto end;
499 }
500
795a978d
PP
501 /* Get payload from data transmission */
502 ret = recv_sessiond_optional_data(llm.data_size, user_payload_buf,
503 &payload_len);
504 if (ret < 0) {
83009e5e
DG
505 goto end;
506 }
507
795a978d 508 ret = llm.data_size;
65beb5ff
DG
509
510end:
511 disconnect_sessiond();
512 return ret;
513}
514
9f19cc17 515/*
cd80958d 516 * Create lttng handle and return pointer.
9ae110e2 517 *
1c8d13c8 518 * The returned pointer will be NULL in case of malloc() error.
9f19cc17 519 */
cd80958d
DG
520struct lttng_handle *lttng_create_handle(const char *session_name,
521 struct lttng_domain *domain)
9f19cc17 522{
2f70b271
DG
523 struct lttng_handle *handle = NULL;
524
3f451dc0 525 handle = zmalloc(sizeof(struct lttng_handle));
cd80958d 526 if (handle == NULL) {
2f70b271 527 PERROR("malloc handle");
cd80958d
DG
528 goto end;
529 }
530
531 /* Copy session name */
cac3069d 532 lttng_ctl_copy_string(handle->session_name, session_name,
cd80958d
DG
533 sizeof(handle->session_name));
534
95681498
JG
535 /* Copy lttng domain or leave initialized to 0. */
536 if (domain) {
537 lttng_ctl_copy_lttng_domain(&handle->domain, domain);
538 }
cd80958d
DG
539
540end:
541 return handle;
542}
543
544/*
545 * Destroy handle by free(3) the pointer.
546 */
547void lttng_destroy_handle(struct lttng_handle *handle)
548{
0e428499 549 free(handle);
eb354453
DG
550}
551
d9800920
DG
552/*
553 * Register an outside consumer.
9ae110e2 554 *
1c8d13c8 555 * Returns size of returned session payload data or a negative error code.
d9800920
DG
556 */
557int lttng_register_consumer(struct lttng_handle *handle,
558 const char *socket_path)
559{
560 struct lttcomm_session_msg lsm;
561
2f70b271
DG
562 if (handle == NULL || socket_path == NULL) {
563 return -LTTNG_ERR_INVALID;
564 }
565
53efb85a 566 memset(&lsm, 0, sizeof(lsm));
d9800920 567 lsm.cmd_type = LTTNG_REGISTER_CONSUMER;
cac3069d 568 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
d9800920 569 sizeof(lsm.session.name));
cac3069d 570 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
d9800920 571
9ae110e2
JG
572 lttng_ctl_copy_string(lsm.u.reg.path, socket_path,
573 sizeof(lsm.u.reg.path));
d9800920 574
cac3069d 575 return lttng_ctl_ask_sessiond(&lsm, NULL);
d9800920
DG
576}
577
1df4dedd 578/*
9ae110e2
JG
579 * Start tracing for all traces of the session.
580 *
581 * Returns size of returned session payload data or a negative error code.
1df4dedd 582 */
6a4f824d 583int lttng_start_tracing(const char *session_name)
f3ed775e 584{
cd80958d
DG
585 struct lttcomm_session_msg lsm;
586
6a4f824d 587 if (session_name == NULL) {
2f70b271 588 return -LTTNG_ERR_INVALID;
cd80958d
DG
589 }
590
53efb85a 591 memset(&lsm, 0, sizeof(lsm));
cd80958d 592 lsm.cmd_type = LTTNG_START_TRACE;
6a4f824d 593
cac3069d
DG
594 lttng_ctl_copy_string(lsm.session.name, session_name,
595 sizeof(lsm.session.name));
cd80958d 596
cac3069d 597 return lttng_ctl_ask_sessiond(&lsm, NULL);
f3ed775e 598}
1df4dedd
DG
599
600/*
38ee087f 601 * Stop tracing for all traces of the session.
f3ed775e 602 */
38ee087f 603static int _lttng_stop_tracing(const char *session_name, int wait)
f3ed775e 604{
38ee087f 605 int ret, data_ret;
cd80958d
DG
606 struct lttcomm_session_msg lsm;
607
6a4f824d 608 if (session_name == NULL) {
2f70b271 609 return -LTTNG_ERR_INVALID;
6a4f824d
DG
610 }
611
53efb85a 612 memset(&lsm, 0, sizeof(lsm));
cd80958d 613 lsm.cmd_type = LTTNG_STOP_TRACE;
6a4f824d 614
cac3069d
DG
615 lttng_ctl_copy_string(lsm.session.name, session_name,
616 sizeof(lsm.session.name));
cd80958d 617
cac3069d 618 ret = lttng_ctl_ask_sessiond(&lsm, NULL);
38ee087f
DG
619 if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
620 goto error;
621 }
622
623 if (!wait) {
624 goto end;
625 }
626
38ee087f
DG
627 /* Check for data availability */
628 do {
6d805429 629 data_ret = lttng_data_pending(session_name);
38ee087f
DG
630 if (data_ret < 0) {
631 /* Return the data available call error. */
632 ret = data_ret;
633 goto error;
634 }
635
636 /*
9ae110e2
JG
637 * Data sleep time before retrying (in usec). Don't sleep if the
638 * call returned value indicates availability.
38ee087f 639 */
6d805429 640 if (data_ret) {
38ee087f 641 usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME);
38ee087f 642 }
6d805429 643 } while (data_ret != 0);
38ee087f 644
38ee087f
DG
645end:
646error:
647 return ret;
648}
649
650/*
651 * Stop tracing and wait for data availability.
652 */
653int lttng_stop_tracing(const char *session_name)
654{
655 return _lttng_stop_tracing(session_name, 1);
656}
657
658/*
659 * Stop tracing but _don't_ wait for data availability.
660 */
661int lttng_stop_tracing_no_wait(const char *session_name)
662{
663 return _lttng_stop_tracing(session_name, 0);
f3ed775e
DG
664}
665
666/*
601d5acf
DG
667 * Add context to a channel.
668 *
669 * If the given channel is NULL, add the contexts to all channels.
670 * The event_name param is ignored.
af87c45a
DG
671 *
672 * Returns the size of the returned payload data or a negative error code.
1df4dedd 673 */
cd80958d 674int lttng_add_context(struct lttng_handle *handle,
38057ed1
DG
675 struct lttng_event_context *ctx, const char *event_name,
676 const char *channel_name)
d65106b1 677{
2001793c
JG
678 int ret;
679 size_t len = 0;
680 char *buf = NULL;
cd80958d
DG
681 struct lttcomm_session_msg lsm;
682
9ae110e2 683 /* Safety check. Both are mandatory. */
9d697d3d 684 if (handle == NULL || ctx == NULL) {
2001793c
JG
685 ret = -LTTNG_ERR_INVALID;
686 goto end;
cd80958d
DG
687 }
688
441c16a7 689 memset(&lsm, 0, sizeof(lsm));
cd80958d
DG
690 lsm.cmd_type = LTTNG_ADD_CONTEXT;
691
85076754
MD
692 /* If no channel name, send empty string. */
693 if (channel_name == NULL) {
694 lttng_ctl_copy_string(lsm.u.context.channel_name, "",
695 sizeof(lsm.u.context.channel_name));
696 } else {
697 lttng_ctl_copy_string(lsm.u.context.channel_name, channel_name,
698 sizeof(lsm.u.context.channel_name));
699 }
cd80958d 700
cac3069d 701 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
cac3069d 702 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
cd80958d
DG
703 sizeof(lsm.session.name));
704
2001793c
JG
705 if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
706 size_t provider_len, ctx_len;
707 const char *provider_name = ctx->u.app_ctx.provider_name;
708 const char *ctx_name = ctx->u.app_ctx.ctx_name;
709
710 if (!provider_name || !ctx_name) {
711 ret = -LTTNG_ERR_INVALID;
712 goto end;
713 }
714
715 provider_len = strlen(provider_name);
716 if (provider_len == 0) {
717 ret = -LTTNG_ERR_INVALID;
718 goto end;
719 }
720 lsm.u.context.provider_name_len = provider_len;
721
722 ctx_len = strlen(ctx_name);
723 if (ctx_len == 0) {
724 ret = -LTTNG_ERR_INVALID;
725 goto end;
726 }
727 lsm.u.context.context_name_len = ctx_len;
728
729 len = provider_len + ctx_len;
730 buf = zmalloc(len);
731 if (!buf) {
732 ret = -LTTNG_ERR_NOMEM;
733 goto end;
734 }
735
736 memcpy(buf, provider_name, provider_len);
737 memcpy(buf + provider_len, ctx_name, ctx_len);
738 }
739 memcpy(&lsm.u.context.ctx, ctx, sizeof(struct lttng_event_context));
46f44e2a
JR
740
741 if (ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
742 /*
743 * Don't leak application addresses to the sessiond.
744 * This is only necessary when ctx is for an app ctx otherwise
745 * the values inside the union (type & config) are overwritten.
746 */
747 lsm.u.context.ctx.u.app_ctx.provider_name = NULL;
748 lsm.u.context.ctx.u.app_ctx.ctx_name = NULL;
749 }
2001793c 750
795a978d 751 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, buf, len, NULL);
2001793c
JG
752end:
753 free(buf);
754 return ret;
d65106b1
DG
755}
756
f3ed775e 757/*
9ae110e2
JG
758 * Enable event(s) for a channel.
759 *
760 * If no event name is specified, all events are enabled.
761 * If no channel name is specified, the default 'channel0' is used.
762 *
763 * Returns size of returned session payload data or a negative error code.
f3ed775e 764 */
cd80958d 765int lttng_enable_event(struct lttng_handle *handle,
38057ed1 766 struct lttng_event *ev, const char *channel_name)
1df4dedd 767{
f8a96544
JI
768 return lttng_enable_event_with_exclusions(handle, ev, channel_name,
769 NULL, 0, NULL);
1df4dedd
DG
770}
771
53a80697 772/*
025faf73 773 * Create or enable an event with a filter expression.
178191b3 774 *
53a80697
MD
775 * Return negative error value on error.
776 * Return size of returned session payload data if OK.
777 */
025faf73 778int lttng_enable_event_with_filter(struct lttng_handle *handle,
178191b3 779 struct lttng_event *event, const char *channel_name,
53a80697
MD
780 const char *filter_expression)
781{
f8a96544
JI
782 return lttng_enable_event_with_exclusions(handle, event, channel_name,
783 filter_expression, 0, NULL);
53a80697
MD
784}
785
347c5ab5 786/*
0e115563 787 * Depending on the event, return a newly allocated agent filter expression or
347c5ab5
DG
788 * NULL if not applicable.
789 *
790 * An event with NO loglevel and the name is * will return NULL.
791 */
0e115563 792static char *set_agent_filter(const char *filter, struct lttng_event *ev)
347c5ab5
DG
793{
794 int err;
0e115563 795 char *agent_filter = NULL;
347c5ab5
DG
796
797 assert(ev);
798
799 /* Don't add filter for the '*' event. */
800 if (ev->name[0] != '*') {
801 if (filter) {
0e115563 802 err = asprintf(&agent_filter, "(%s) && (logger_name == \"%s\")", filter,
347c5ab5
DG
803 ev->name);
804 } else {
0e115563 805 err = asprintf(&agent_filter, "logger_name == \"%s\"", ev->name);
347c5ab5
DG
806 }
807 if (err < 0) {
808 PERROR("asprintf");
6a556f7b 809 goto error;
347c5ab5
DG
810 }
811 }
812
813 /* Add loglevel filtering if any for the JUL domain. */
814 if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) {
815 char *op;
816
817 if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) {
818 op = ">=";
819 } else {
820 op = "==";
821 }
822
0e115563 823 if (filter || agent_filter) {
6a556f7b
JG
824 char *new_filter;
825
fb0edb23 826 err = asprintf(&new_filter, "(%s) && (int_loglevel %s %d)",
0e115563 827 agent_filter ? agent_filter : filter, op,
347c5ab5 828 ev->loglevel);
0e115563
DG
829 if (agent_filter) {
830 free(agent_filter);
6a556f7b 831 }
0e115563 832 agent_filter = new_filter;
347c5ab5 833 } else {
0e115563 834 err = asprintf(&agent_filter, "int_loglevel %s %d", op,
347c5ab5
DG
835 ev->loglevel);
836 }
837 if (err < 0) {
838 PERROR("asprintf");
6a556f7b 839 goto error;
347c5ab5
DG
840 }
841 }
842
0e115563 843 return agent_filter;
6a556f7b 844error:
0e115563 845 free(agent_filter);
6a556f7b 846 return NULL;
347c5ab5
DG
847}
848
137b9942 849/*
ec166985 850 * Generate the filter bytecode from a given filter expression string. Put the
137b9942
DG
851 * newly allocated parser context in ctxp and populate the lsm object with the
852 * expression len.
853 *
854 * Return 0 on success else a LTTNG_ERR_* code and ctxp is untouched.
855 */
856static int generate_filter(char *filter_expression,
857 struct lttcomm_session_msg *lsm, struct filter_parser_ctx **ctxp)
858{
859 int ret;
860 struct filter_parser_ctx *ctx = NULL;
861 FILE *fmem = NULL;
862
863 assert(filter_expression);
864 assert(lsm);
865 assert(ctxp);
866
867 /*
868 * Casting const to non-const, as the underlying function will use it in
869 * read-only mode.
870 */
871 fmem = lttng_fmemopen((void *) filter_expression,
872 strlen(filter_expression), "r");
873 if (!fmem) {
874 fprintf(stderr, "Error opening memory as stream\n");
875 ret = -LTTNG_ERR_FILTER_NOMEM;
876 goto error;
877 }
878 ctx = filter_parser_ctx_alloc(fmem);
879 if (!ctx) {
880 fprintf(stderr, "Error allocating parser\n");
881 ret = -LTTNG_ERR_FILTER_NOMEM;
882 goto filter_alloc_error;
883 }
884 ret = filter_parser_ctx_append_ast(ctx);
885 if (ret) {
886 fprintf(stderr, "Parse error\n");
887 ret = -LTTNG_ERR_FILTER_INVAL;
888 goto parse_error;
889 }
890 ret = filter_visitor_set_parent(ctx);
891 if (ret) {
892 fprintf(stderr, "Set parent error\n");
893 ret = -LTTNG_ERR_FILTER_INVAL;
894 goto parse_error;
895 }
896 if (print_xml) {
897 ret = filter_visitor_print_xml(ctx, stdout, 0);
898 if (ret) {
899 fflush(stdout);
900 fprintf(stderr, "XML print error\n");
901 ret = -LTTNG_ERR_FILTER_INVAL;
902 goto parse_error;
903 }
904 }
905
906 dbg_printf("Generating IR... ");
907 fflush(stdout);
908 ret = filter_visitor_ir_generate(ctx);
909 if (ret) {
910 fprintf(stderr, "Generate IR error\n");
911 ret = -LTTNG_ERR_FILTER_INVAL;
912 goto parse_error;
913 }
914 dbg_printf("done\n");
915
916 dbg_printf("Validating IR... ");
917 fflush(stdout);
918 ret = filter_visitor_ir_check_binary_op_nesting(ctx);
919 if (ret) {
920 ret = -LTTNG_ERR_FILTER_INVAL;
921 goto parse_error;
922 }
9ae110e2 923 /* Validate strings used as literals in the expression. */
dcd5daf2
JG
924 ret = filter_visitor_ir_validate_string(ctx);
925 if (ret) {
926 ret = -LTTNG_ERR_FILTER_INVAL;
927 goto parse_error;
928 }
137b9942
DG
929 dbg_printf("done\n");
930
931 dbg_printf("Generating bytecode... ");
932 fflush(stdout);
933 ret = filter_visitor_bytecode_generate(ctx);
934 if (ret) {
935 fprintf(stderr, "Generate bytecode error\n");
936 ret = -LTTNG_ERR_FILTER_INVAL;
937 goto parse_error;
938 }
939 dbg_printf("done\n");
940 dbg_printf("Size of bytecode generated: %u bytes.\n",
941 bytecode_get_len(&ctx->bytecode->b));
942
943 lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b)
944 + bytecode_get_len(&ctx->bytecode->b);
945 lsm->u.enable.expression_len = strlen(filter_expression) + 1;
946
947 /* No need to keep the memory stream. */
948 if (fclose(fmem) != 0) {
6f04ed72 949 PERROR("fclose");
137b9942
DG
950 }
951
952 *ctxp = ctx;
953 return 0;
954
955parse_error:
137b9942
DG
956 filter_ir_free(ctx);
957 filter_parser_ctx_free(ctx);
958filter_alloc_error:
959 if (fclose(fmem) != 0) {
6f04ed72 960 PERROR("fclose");
137b9942
DG
961 }
962error:
963 return ret;
964}
965
93deb080
JI
966/*
967 * Enable event(s) for a channel, possibly with exclusions and a filter.
968 * If no event name is specified, all events are enabled.
969 * If no channel name is specified, the default name is used.
970 * If filter expression is not NULL, the filter is set for the event.
971 * If exclusion count is not zero, the exclusions are set for the event.
972 * Returns size of returned session payload data or a negative error code.
973 */
974int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
975 struct lttng_event *ev, const char *channel_name,
e9efbcd3 976 const char *original_filter_expression,
93deb080
JI
977 int exclusion_count, char **exclusion_list)
978{
979 struct lttcomm_session_msg lsm;
64226865 980 char *varlen_data;
93deb080 981 int ret = 0;
137b9942 982 unsigned int free_filter_expression = 0;
93deb080 983 struct filter_parser_ctx *ctx = NULL;
e9efbcd3
JG
984 /*
985 * Cast as non-const since we may replace the filter expression
986 * by a dynamically allocated string. Otherwise, the original
987 * string is not modified.
988 */
989 char *filter_expression = (char *) original_filter_expression;
93deb080
JI
990
991 if (handle == NULL || ev == NULL) {
137b9942
DG
992 ret = -LTTNG_ERR_INVALID;
993 goto error;
93deb080
JI
994 }
995
9ae110e2
JG
996 /*
997 * Empty filter string will always be rejected by the parser
93deb080
JI
998 * anyway, so treat this corner-case early to eliminate
999 * lttng_fmemopen error for 0-byte allocation.
1000 */
1001 if (filter_expression && filter_expression[0] == '\0') {
137b9942
DG
1002 ret = -LTTNG_ERR_INVALID;
1003 goto error;
93deb080
JI
1004 }
1005
1006 memset(&lsm, 0, sizeof(lsm));
1007
1008 /* If no channel name, send empty string. */
1009 if (channel_name == NULL) {
1010 lttng_ctl_copy_string(lsm.u.enable.channel_name, "",
1011 sizeof(lsm.u.enable.channel_name));
1012 } else {
1013 lttng_ctl_copy_string(lsm.u.enable.channel_name, channel_name,
1014 sizeof(lsm.u.enable.channel_name));
1015 }
1016
18a720cd
MD
1017 lsm.cmd_type = LTTNG_ENABLE_EVENT;
1018 if (ev->name[0] == '\0') {
1019 /* Enable all events */
1020 lttng_ctl_copy_string(ev->name, "*", sizeof(ev->name));
6565421f 1021 }
93deb080 1022
6565421f 1023 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
6e911cad 1024 /* FIXME: copying non-packed struct to packed struct. */
93deb080
JI
1025 memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event));
1026
1027 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
1028 sizeof(lsm.session.name));
1029 lsm.u.enable.exclusion_count = exclusion_count;
1030 lsm.u.enable.bytecode_len = 0;
1031
9b21e6d5
DG
1032 /*
1033 * For the JUL domain, a filter is enforced except for the enable all
1034 * event. This is done to avoid having the event in all sessions thus
1035 * filtering by logger name.
1036 */
1037 if (exclusion_count == 0 && filter_expression == NULL &&
5cdb6027 1038 (handle->domain.type != LTTNG_DOMAIN_JUL &&
0e115563
DG
1039 handle->domain.type != LTTNG_DOMAIN_LOG4J &&
1040 handle->domain.type != LTTNG_DOMAIN_PYTHON)) {
3e1c9ff7 1041 goto ask_sessiond;
93deb080
JI
1042 }
1043
1044 /*
1045 * We have either a filter or some exclusions, so we need to set up
9ae110e2 1046 * a variable-length memory block from where to send the data.
93deb080
JI
1047 */
1048
9ae110e2 1049 /* Parse filter expression. */
5cdb6027 1050 if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL
0e115563
DG
1051 || handle->domain.type == LTTNG_DOMAIN_LOG4J
1052 || handle->domain.type == LTTNG_DOMAIN_PYTHON) {
5cdb6027 1053 if (handle->domain.type == LTTNG_DOMAIN_JUL ||
0e115563
DG
1054 handle->domain.type == LTTNG_DOMAIN_LOG4J ||
1055 handle->domain.type == LTTNG_DOMAIN_PYTHON) {
1056 char *agent_filter;
64226865 1057
347c5ab5 1058 /* Setup JUL filter if needed. */
0e115563
DG
1059 agent_filter = set_agent_filter(filter_expression, ev);
1060 if (!agent_filter) {
137b9942 1061 if (!filter_expression) {
9ae110e2
JG
1062 /*
1063 * No JUL and no filter, just skip
1064 * everything below.
1065 */
137b9942
DG
1066 goto ask_sessiond;
1067 }
64226865
DG
1068 } else {
1069 /*
9ae110e2
JG
1070 * With an agent filter, the original filter has
1071 * been added to it thus replace the filter
1072 * expression.
64226865 1073 */
0e115563 1074 filter_expression = agent_filter;
e9efbcd3 1075 free_filter_expression = 1;
9b21e6d5 1076 }
9b21e6d5 1077 }
93deb080 1078
137b9942 1079 ret = generate_filter(filter_expression, &lsm, &ctx);
93deb080 1080 if (ret) {
137b9942 1081 goto filter_error;
93deb080 1082 }
6b453b5e
JG
1083 }
1084
1085 varlen_data = zmalloc(lsm.u.enable.bytecode_len
137b9942
DG
1086 + lsm.u.enable.expression_len
1087 + LTTNG_SYMBOL_NAME_LEN * exclusion_count);
6b453b5e
JG
1088 if (!varlen_data) {
1089 ret = -LTTNG_ERR_EXCLUSION_NOMEM;
7ca1dc6f 1090 goto mem_error;
6b453b5e 1091 }
137b9942 1092
9ae110e2 1093 /* Put exclusion names first in the data. */
6b453b5e
JG
1094 while (exclusion_count--) {
1095 strncpy(varlen_data + LTTNG_SYMBOL_NAME_LEN * exclusion_count,
0c82ac62
PP
1096 *(exclusion_list + exclusion_count),
1097 LTTNG_SYMBOL_NAME_LEN - 1);
6b453b5e 1098 }
9ae110e2 1099 /* Add filter expression next. */
6b453b5e
JG
1100 if (lsm.u.enable.expression_len != 0) {
1101 memcpy(varlen_data
1102 + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count,
1103 filter_expression,
1104 lsm.u.enable.expression_len);
1105 }
9ae110e2 1106 /* Add filter bytecode next. */
137b9942 1107 if (ctx && lsm.u.enable.bytecode_len != 0) {
6b453b5e
JG
1108 memcpy(varlen_data
1109 + LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count
1110 + lsm.u.enable.expression_len,
1111 &ctx->bytecode->b,
1112 lsm.u.enable.bytecode_len);
93deb080
JI
1113 }
1114
795a978d 1115 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data,
67676bd8 1116 (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) +
9ae110e2
JG
1117 lsm.u.enable.bytecode_len + lsm.u.enable.expression_len,
1118 NULL);
6b453b5e 1119 free(varlen_data);
93deb080 1120
7ca1dc6f
DG
1121mem_error:
1122 if (filter_expression && ctx) {
93deb080
JI
1123 filter_bytecode_free(ctx);
1124 filter_ir_free(ctx);
1125 filter_parser_ctx_free(ctx);
7ca1dc6f
DG
1126 }
1127filter_error:
1128 if (free_filter_expression) {
1129 /*
9ae110e2
JG
1130 * The filter expression has been replaced and must be freed as
1131 * it is not the original filter expression received as a
1132 * parameter.
7ca1dc6f
DG
1133 */
1134 free(filter_expression);
93deb080 1135 }
137b9942
DG
1136error:
1137 /*
9ae110e2
JG
1138 * Return directly to the caller and don't ask the sessiond since
1139 * something went wrong in the parsing of data above.
137b9942 1140 */
93deb080 1141 return ret;
3e1c9ff7
DG
1142
1143ask_sessiond:
1144 ret = lttng_ctl_ask_sessiond(&lsm, NULL);
1145 return ret;
93deb080
JI
1146}
1147
6e911cad
MD
1148int lttng_disable_event_ext(struct lttng_handle *handle,
1149 struct lttng_event *ev, const char *channel_name,
1150 const char *original_filter_expression)
1df4dedd 1151{
cd80958d 1152 struct lttcomm_session_msg lsm;
6e911cad
MD
1153 char *varlen_data;
1154 int ret = 0;
1155 unsigned int free_filter_expression = 0;
1156 struct filter_parser_ctx *ctx = NULL;
1157 /*
1158 * Cast as non-const since we may replace the filter expression
1159 * by a dynamically allocated string. Otherwise, the original
1160 * string is not modified.
1161 */
1162 char *filter_expression = (char *) original_filter_expression;
1df4dedd 1163
6e911cad
MD
1164 if (handle == NULL || ev == NULL) {
1165 ret = -LTTNG_ERR_INVALID;
1166 goto error;
1167 }
1168
9ae110e2
JG
1169 /*
1170 * Empty filter string will always be rejected by the parser
6e911cad
MD
1171 * anyway, so treat this corner-case early to eliminate
1172 * lttng_fmemopen error for 0-byte allocation.
1173 */
1174 if (filter_expression && filter_expression[0] == '\0') {
1175 ret = -LTTNG_ERR_INVALID;
1176 goto error;
cd80958d
DG
1177 }
1178
441c16a7
MD
1179 memset(&lsm, 0, sizeof(lsm));
1180
85076754
MD
1181 /* If no channel name, send empty string. */
1182 if (channel_name == NULL) {
1183 lttng_ctl_copy_string(lsm.u.disable.channel_name, "",
cd80958d 1184 sizeof(lsm.u.disable.channel_name));
f3ed775e 1185 } else {
85076754 1186 lttng_ctl_copy_string(lsm.u.disable.channel_name, channel_name,
cd80958d 1187 sizeof(lsm.u.disable.channel_name));
eb354453
DG
1188 }
1189
18a720cd 1190 lsm.cmd_type = LTTNG_DISABLE_EVENT;
f3ed775e 1191
6e911cad
MD
1192 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
1193 /* FIXME: copying non-packed struct to packed struct. */
1194 memcpy(&lsm.u.disable.event, ev, sizeof(lsm.u.disable.event));
1195
cac3069d 1196 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
cd80958d 1197 sizeof(lsm.session.name));
6e911cad 1198 lsm.u.disable.bytecode_len = 0;
cd80958d 1199
6e911cad
MD
1200 /*
1201 * For the JUL domain, a filter is enforced except for the
1202 * disable all event. This is done to avoid having the event in
1203 * all sessions thus filtering by logger name.
1204 */
1205 if (filter_expression == NULL &&
1206 (handle->domain.type != LTTNG_DOMAIN_JUL &&
0e115563
DG
1207 handle->domain.type != LTTNG_DOMAIN_LOG4J &&
1208 handle->domain.type != LTTNG_DOMAIN_PYTHON)) {
6e911cad
MD
1209 goto ask_sessiond;
1210 }
1211
1212 /*
1213 * We have a filter, so we need to set up a variable-length
1214 * memory block from where to send the data.
1215 */
1216
1217 /* Parse filter expression */
1218 if (filter_expression != NULL || handle->domain.type == LTTNG_DOMAIN_JUL
0e115563
DG
1219 || handle->domain.type == LTTNG_DOMAIN_LOG4J
1220 || handle->domain.type == LTTNG_DOMAIN_PYTHON) {
6e911cad 1221 if (handle->domain.type == LTTNG_DOMAIN_JUL ||
0e115563
DG
1222 handle->domain.type == LTTNG_DOMAIN_LOG4J ||
1223 handle->domain.type == LTTNG_DOMAIN_PYTHON) {
1224 char *agent_filter;
6e911cad
MD
1225
1226 /* Setup JUL filter if needed. */
0e115563
DG
1227 agent_filter = set_agent_filter(filter_expression, ev);
1228 if (!agent_filter) {
6e911cad 1229 if (!filter_expression) {
9ae110e2
JG
1230 /*
1231 * No JUL and no filter, just skip
1232 * everything below.
1233 */
6e911cad
MD
1234 goto ask_sessiond;
1235 }
1236 } else {
1237 /*
9ae110e2
JG
1238 * With a JUL filter, the original filter has
1239 * been added to it thus replace the filter
1240 * expression.
6e911cad 1241 */
0e115563 1242 filter_expression = agent_filter;
6e911cad
MD
1243 free_filter_expression = 1;
1244 }
1245 }
1246
1247 ret = generate_filter(filter_expression, &lsm, &ctx);
1248 if (ret) {
1249 goto filter_error;
1250 }
1251 }
1252
1253 varlen_data = zmalloc(lsm.u.disable.bytecode_len
1254 + lsm.u.disable.expression_len);
1255 if (!varlen_data) {
1256 ret = -LTTNG_ERR_EXCLUSION_NOMEM;
1257 goto mem_error;
1258 }
1259
9ae110e2 1260 /* Add filter expression. */
6e911cad
MD
1261 if (lsm.u.disable.expression_len != 0) {
1262 memcpy(varlen_data,
1263 filter_expression,
1264 lsm.u.disable.expression_len);
1265 }
9ae110e2 1266 /* Add filter bytecode next. */
6e911cad
MD
1267 if (ctx && lsm.u.disable.bytecode_len != 0) {
1268 memcpy(varlen_data
1269 + lsm.u.disable.expression_len,
1270 &ctx->bytecode->b,
1271 lsm.u.disable.bytecode_len);
1272 }
1273
795a978d 1274 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, varlen_data,
6e911cad
MD
1275 lsm.u.disable.bytecode_len + lsm.u.disable.expression_len, NULL);
1276 free(varlen_data);
1277
1278mem_error:
1279 if (filter_expression && ctx) {
1280 filter_bytecode_free(ctx);
1281 filter_ir_free(ctx);
1282 filter_parser_ctx_free(ctx);
1283 }
1284filter_error:
1285 if (free_filter_expression) {
1286 /*
9ae110e2
JG
1287 * The filter expression has been replaced and must be freed as
1288 * it is not the original filter expression received as a
1289 * parameter.
6e911cad
MD
1290 */
1291 free(filter_expression);
1292 }
1293error:
1294 /*
9ae110e2
JG
1295 * Return directly to the caller and don't ask the sessiond since
1296 * something went wrong in the parsing of data above.
6e911cad
MD
1297 */
1298 return ret;
1299
1300ask_sessiond:
1301 ret = lttng_ctl_ask_sessiond(&lsm, NULL);
1302 return ret;
1303}
1304
1305/*
9ae110e2
JG
1306 * Disable event(s) of a channel and domain.
1307 * If no event name is specified, all events are disabled.
1308 * If no channel name is specified, the default 'channel0' is used.
1309 * Returns size of returned session payload data or a negative error code.
6e911cad
MD
1310 */
1311int lttng_disable_event(struct lttng_handle *handle, const char *name,
1312 const char *channel_name)
1313{
1314 struct lttng_event ev;
1315
1316 memset(&ev, 0, sizeof(ev));
9b7431cf 1317 ev.loglevel = -1;
6e911cad
MD
1318 ev.type = LTTNG_EVENT_ALL;
1319 lttng_ctl_copy_string(ev.name, name, sizeof(ev.name));
1320 return lttng_disable_event_ext(handle, &ev, channel_name, NULL);
1df4dedd
DG
1321}
1322
1323/*
9ae110e2
JG
1324 * Enable channel per domain
1325 * Returns size of returned session payload data or a negative error code.
a5c5a2bd 1326 */
cd80958d 1327int lttng_enable_channel(struct lttng_handle *handle,
38057ed1 1328 struct lttng_channel *chan)
a5c5a2bd 1329{
cd80958d
DG
1330 struct lttcomm_session_msg lsm;
1331
9ae110e2 1332 /* NULL arguments are forbidden. No default values. */
5117eeec 1333 if (handle == NULL || chan == NULL) {
2f70b271 1334 return -LTTNG_ERR_INVALID;
cd80958d
DG
1335 }
1336
441c16a7
MD
1337 memset(&lsm, 0, sizeof(lsm));
1338
5117eeec 1339 memcpy(&lsm.u.channel.chan, chan, sizeof(lsm.u.channel.chan));
7d29a247 1340
cd80958d
DG
1341 lsm.cmd_type = LTTNG_ENABLE_CHANNEL;
1342
cac3069d 1343 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
7d29a247 1344
cac3069d 1345 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
cd80958d
DG
1346 sizeof(lsm.session.name));
1347
cac3069d 1348 return lttng_ctl_ask_sessiond(&lsm, NULL);
8c0faa1d 1349}
1df4dedd 1350
2ef84c95 1351/*
9ae110e2
JG
1352 * All tracing will be stopped for registered events of the channel.
1353 * Returns size of returned session payload data or a negative error code.
2ef84c95 1354 */
cd80958d 1355int lttng_disable_channel(struct lttng_handle *handle, const char *name)
2ef84c95 1356{
cd80958d
DG
1357 struct lttcomm_session_msg lsm;
1358
9ae110e2 1359 /* Safety check. Both are mandatory. */
9d697d3d 1360 if (handle == NULL || name == NULL) {
2f70b271 1361 return -LTTNG_ERR_INVALID;
cd80958d
DG
1362 }
1363
441c16a7
MD
1364 memset(&lsm, 0, sizeof(lsm));
1365
cd80958d 1366 lsm.cmd_type = LTTNG_DISABLE_CHANNEL;
1df4dedd 1367
cac3069d 1368 lttng_ctl_copy_string(lsm.u.disable.channel_name, name,
9d697d3d
DG
1369 sizeof(lsm.u.disable.channel_name));
1370
cac3069d 1371 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
cd80958d 1372
cac3069d 1373 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
cd80958d
DG
1374 sizeof(lsm.session.name));
1375
cac3069d 1376 return lttng_ctl_ask_sessiond(&lsm, NULL);
ca95a216
DG
1377}
1378
ccf10263 1379/*
9ae110e2
JG
1380 * Add PID to session tracker.
1381 * Return 0 on success else a negative LTTng error code.
ccf10263
MD
1382 */
1383int lttng_track_pid(struct lttng_handle *handle, int pid)
1384{
1385 struct lttcomm_session_msg lsm;
1386
9ae110e2 1387 /* NULL arguments are forbidden. No default values. */
ccf10263
MD
1388 if (handle == NULL) {
1389 return -LTTNG_ERR_INVALID;
1390 }
1391
1392 memset(&lsm, 0, sizeof(lsm));
1393
1394 lsm.cmd_type = LTTNG_TRACK_PID;
1395 lsm.u.pid_tracker.pid = pid;
1396
1397 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
1398
1399 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
1400 sizeof(lsm.session.name));
1401
1402 return lttng_ctl_ask_sessiond(&lsm, NULL);
1403}
1404
1405/*
9ae110e2
JG
1406 * Remove PID from session tracker.
1407 * Return 0 on success else a negative LTTng error code.
ccf10263
MD
1408 */
1409int lttng_untrack_pid(struct lttng_handle *handle, int pid)
1410{
1411 struct lttcomm_session_msg lsm;
1412
9ae110e2 1413 /* NULL arguments are forbidden. No default values. */
ccf10263
MD
1414 if (handle == NULL) {
1415 return -LTTNG_ERR_INVALID;
1416 }
1417
1418 memset(&lsm, 0, sizeof(lsm));
1419
1420 lsm.cmd_type = LTTNG_UNTRACK_PID;
1421 lsm.u.pid_tracker.pid = pid;
1422
1423 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
1424
1425 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
1426 sizeof(lsm.session.name));
1427
1428 return lttng_ctl_ask_sessiond(&lsm, NULL);
1429}
1430
fac6795d 1431/*
9ae110e2
JG
1432 * Lists all available tracepoints of domain.
1433 * Sets the contents of the events array.
1434 * Returns the number of lttng_event entries in events;
1435 * on error, returns a negative value.
fac6795d 1436 */
cd80958d 1437int lttng_list_tracepoints(struct lttng_handle *handle,
2a71efd5 1438 struct lttng_event **events)
fac6795d 1439{
052da939 1440 int ret;
cd80958d
DG
1441 struct lttcomm_session_msg lsm;
1442
9d697d3d 1443 if (handle == NULL) {
2f70b271 1444 return -LTTNG_ERR_INVALID;
cd80958d 1445 }
fac6795d 1446
53efb85a 1447 memset(&lsm, 0, sizeof(lsm));
cd80958d 1448 lsm.cmd_type = LTTNG_LIST_TRACEPOINTS;
cac3069d 1449 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
2a71efd5 1450
cac3069d 1451 ret = lttng_ctl_ask_sessiond(&lsm, (void **) events);
052da939
DG
1452 if (ret < 0) {
1453 return ret;
eb354453 1454 }
fac6795d 1455
9f19cc17 1456 return ret / sizeof(struct lttng_event);
fac6795d
DG
1457}
1458
f37d259d 1459/*
9ae110e2
JG
1460 * Lists all available tracepoint fields of domain.
1461 * Sets the contents of the event field array.
1462 * Returns the number of lttng_event_field entries in events;
1463 * on error, returns a negative value.
f37d259d
MD
1464 */
1465int lttng_list_tracepoint_fields(struct lttng_handle *handle,
1466 struct lttng_event_field **fields)
1467{
1468 int ret;
1469 struct lttcomm_session_msg lsm;
1470
1471 if (handle == NULL) {
2f70b271 1472 return -LTTNG_ERR_INVALID;
f37d259d
MD
1473 }
1474
53efb85a 1475 memset(&lsm, 0, sizeof(lsm));
f37d259d 1476 lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS;
cac3069d 1477 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
f37d259d 1478
cac3069d 1479 ret = lttng_ctl_ask_sessiond(&lsm, (void **) fields);
f37d259d
MD
1480 if (ret < 0) {
1481 return ret;
1482 }
1483
1484 return ret / sizeof(struct lttng_event_field);
1485}
1486
834978fd 1487/*
9ae110e2
JG
1488 * Lists all available kernel system calls. Allocates and sets the contents of
1489 * the events array.
834978fd 1490 *
9ae110e2
JG
1491 * Returns the number of lttng_event entries in events; on error, returns a
1492 * negative value.
834978fd
DG
1493 */
1494int lttng_list_syscalls(struct lttng_event **events)
1495{
1496 int ret;
1497 struct lttcomm_session_msg lsm;
1498
1499 if (!events) {
1500 return -LTTNG_ERR_INVALID;
1501 }
1502
1503 memset(&lsm, 0, sizeof(lsm));
1504 lsm.cmd_type = LTTNG_LIST_SYSCALLS;
1505 /* Force kernel domain for system calls. */
1506 lsm.domain.type = LTTNG_DOMAIN_KERNEL;
1507
1508 ret = lttng_ctl_ask_sessiond(&lsm, (void **) events);
1509 if (ret < 0) {
1510 return ret;
1511 }
1512
1513 return ret / sizeof(struct lttng_event);
1514}
1515
1657e9bb 1516/*
9ae110e2
JG
1517 * Returns a human readable string describing
1518 * the error code (a negative value).
1657e9bb 1519 */
9a745bc7 1520const char *lttng_strerror(int code)
1657e9bb 1521{
f73fabfd 1522 return error_get_str(code);
1657e9bb
DG
1523}
1524
aaf97519 1525/*
a4b92340
DG
1526 * Create a brand new session using name and url for destination.
1527 *
f73fabfd 1528 * Returns LTTNG_OK on success or a negative error code.
00e2e675 1529 */
a4b92340 1530int lttng_create_session(const char *name, const char *url)
00e2e675 1531{
3dd05a85 1532 int ret;
a4b92340 1533 ssize_t size;
00e2e675 1534 struct lttcomm_session_msg lsm;
a4b92340 1535 struct lttng_uri *uris = NULL;
00e2e675 1536
a4b92340 1537 if (name == NULL) {
2f70b271 1538 return -LTTNG_ERR_INVALID;
00e2e675
DG
1539 }
1540
a4b92340 1541 memset(&lsm, 0, sizeof(lsm));
00e2e675 1542
a4b92340 1543 lsm.cmd_type = LTTNG_CREATE_SESSION;
cac3069d 1544 lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
a4b92340
DG
1545
1546 /* There should never be a data URL */
bc894455 1547 size = uri_parse_str_urls(url, NULL, &uris);
a4b92340 1548 if (size < 0) {
2f70b271 1549 return -LTTNG_ERR_INVALID;
00e2e675
DG
1550 }
1551
a4b92340
DG
1552 lsm.u.uri.size = size;
1553
795a978d 1554 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris,
cac3069d 1555 sizeof(struct lttng_uri) * size, NULL);
3dd05a85
DG
1556
1557 free(uris);
1558 return ret;
00e2e675
DG
1559}
1560
8028d920 1561/*
9ae110e2
JG
1562 * Destroy session using name.
1563 * Returns size of returned session payload data or a negative error code.
8028d920 1564 */
8fd2c92c 1565static
e20ee7c2 1566int _lttng_destroy_session(const char *session_name)
8028d920 1567{
cd80958d
DG
1568 struct lttcomm_session_msg lsm;
1569
843f5df9 1570 if (session_name == NULL) {
2f70b271 1571 return -LTTNG_ERR_INVALID;
cd80958d
DG
1572 }
1573
53efb85a 1574 memset(&lsm, 0, sizeof(lsm));
cd80958d 1575 lsm.cmd_type = LTTNG_DESTROY_SESSION;
843f5df9 1576
cac3069d
DG
1577 lttng_ctl_copy_string(lsm.session.name, session_name,
1578 sizeof(lsm.session.name));
cd80958d 1579
cac3069d 1580 return lttng_ctl_ask_sessiond(&lsm, NULL);
aaf97519
DG
1581}
1582
e20ee7c2
JD
1583/*
1584 * Stop the session and wait for the data before destroying it
1585 */
1586int lttng_destroy_session(const char *session_name)
1587{
1588 int ret;
1589
1590 /*
1591 * Stop the tracing and wait for the data.
1592 */
1593 ret = _lttng_stop_tracing(session_name, 1);
1594 if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
1595 goto end;
1596 }
1597
1598 ret = _lttng_destroy_session(session_name);
1599end:
1600 return ret;
1601}
1602
1603/*
1604 * Destroy the session without waiting for the data.
1605 */
1606int lttng_destroy_session_no_wait(const char *session_name)
1607{
1608 int ret;
1609
1610 /*
1611 * Stop the tracing without waiting for the data.
1612 * The session might already have been stopped, so just
1613 * skip this error.
1614 */
1615 ret = _lttng_stop_tracing(session_name, 0);
1616 if (ret && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
1617 goto end;
1618 }
1619
1620 ret = _lttng_destroy_session(session_name);
1621end:
1622 return ret;
1623}
1624
57167058 1625/*
9ae110e2
JG
1626 * Ask the session daemon for all available sessions.
1627 * Sets the contents of the sessions array.
1628 * Returns the number of lttng_session entries in sessions;
1629 * on error, returns a negative value.
57167058 1630 */
ca95a216 1631int lttng_list_sessions(struct lttng_session **sessions)
57167058 1632{
ca95a216 1633 int ret;
cd80958d 1634 struct lttcomm_session_msg lsm;
57167058 1635
53efb85a 1636 memset(&lsm, 0, sizeof(lsm));
cd80958d 1637 lsm.cmd_type = LTTNG_LIST_SESSIONS;
cac3069d 1638 ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions);
57167058 1639 if (ret < 0) {
ca95a216 1640 return ret;
57167058
DG
1641 }
1642
ca95a216 1643 return ret / sizeof(struct lttng_session);
57167058
DG
1644}
1645
d7ba1388
MD
1646int lttng_set_session_shm_path(const char *session_name,
1647 const char *shm_path)
1648{
1649 struct lttcomm_session_msg lsm;
1650
1651 if (session_name == NULL) {
1652 return -LTTNG_ERR_INVALID;
1653 }
1654
1655 memset(&lsm, 0, sizeof(lsm));
1656 lsm.cmd_type = LTTNG_SET_SESSION_SHM_PATH;
1657
1658 lttng_ctl_copy_string(lsm.session.name, session_name,
1659 sizeof(lsm.session.name));
1660 lttng_ctl_copy_string(lsm.u.set_shm_path.shm_path, shm_path,
1661 sizeof(lsm.u.set_shm_path.shm_path));
1662
1663 return lttng_ctl_ask_sessiond(&lsm, NULL);
1664}
1665
9f19cc17 1666/*
9ae110e2
JG
1667 * Ask the session daemon for all available domains of a session.
1668 * Sets the contents of the domains array.
1669 * Returns the number of lttng_domain entries in domains;
1670 * on error, returns a negative value.
9f19cc17 1671 */
330be774 1672int lttng_list_domains(const char *session_name,
cd80958d 1673 struct lttng_domain **domains)
9f19cc17
DG
1674{
1675 int ret;
cd80958d
DG
1676 struct lttcomm_session_msg lsm;
1677
330be774 1678 if (session_name == NULL) {
2f70b271 1679 return -LTTNG_ERR_INVALID;
cd80958d 1680 }
9f19cc17 1681
53efb85a 1682 memset(&lsm, 0, sizeof(lsm));
cd80958d
DG
1683 lsm.cmd_type = LTTNG_LIST_DOMAINS;
1684
cac3069d
DG
1685 lttng_ctl_copy_string(lsm.session.name, session_name,
1686 sizeof(lsm.session.name));
cd80958d 1687
cac3069d 1688 ret = lttng_ctl_ask_sessiond(&lsm, (void**) domains);
9f19cc17
DG
1689 if (ret < 0) {
1690 return ret;
1691 }
1692
1693 return ret / sizeof(struct lttng_domain);
1694}
1695
1696/*
9ae110e2
JG
1697 * Ask the session daemon for all available channels of a session.
1698 * Sets the contents of the channels array.
1699 * Returns the number of lttng_channel entries in channels;
1700 * on error, returns a negative value.
9f19cc17 1701 */
cd80958d
DG
1702int lttng_list_channels(struct lttng_handle *handle,
1703 struct lttng_channel **channels)
9f19cc17
DG
1704{
1705 int ret;
53e367f9
JG
1706 size_t channel_count, i;
1707 const size_t channel_size = sizeof(struct lttng_channel) +
1708 sizeof(struct lttcomm_channel_extended);
cd80958d 1709 struct lttcomm_session_msg lsm;
53e367f9 1710 void *extended_at;
cd80958d 1711
9d697d3d 1712 if (handle == NULL) {
53e367f9
JG
1713 ret = -LTTNG_ERR_INVALID;
1714 goto end;
cd80958d
DG
1715 }
1716
53efb85a 1717 memset(&lsm, 0, sizeof(lsm));
cd80958d 1718 lsm.cmd_type = LTTNG_LIST_CHANNELS;
cac3069d 1719 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
cd80958d 1720 sizeof(lsm.session.name));
9f19cc17 1721
cac3069d 1722 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
9f19cc17 1723
cac3069d 1724 ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels);
9f19cc17 1725 if (ret < 0) {
53e367f9
JG
1726 goto end;
1727 }
1728
1729 if (ret % channel_size) {
1730 ret = -LTTNG_ERR_UNK;
1731 free(*channels);
1732 *channels = NULL;
1733 goto end;
9f19cc17 1734 }
53e367f9 1735 channel_count = (size_t) ret / channel_size;
9f19cc17 1736
53e367f9
JG
1737 /* Set extended info pointers */
1738 extended_at = ((void *) *channels) +
1739 channel_count * sizeof(struct lttng_channel);
1740 for (i = 0; i < channel_count; i++) {
1741 struct lttng_channel *chan = &(*channels)[i];
1742
1743 chan->attr.extended.ptr = extended_at;
1744 extended_at += sizeof(struct lttcomm_channel_extended);
1745 }
1746
1747 ret = (int) channel_count;
1748end:
1749 return ret;
9f19cc17
DG
1750}
1751
1752/*
9ae110e2
JG
1753 * Ask the session daemon for all available events of a session channel.
1754 * Sets the contents of the events array.
1755 * Returns the number of lttng_event entries in events;
1756 * on error, returns a negative value.
9f19cc17 1757 */
cd80958d
DG
1758int lttng_list_events(struct lttng_handle *handle,
1759 const char *channel_name, struct lttng_event **events)
9f19cc17
DG
1760{
1761 int ret;
cd80958d 1762 struct lttcomm_session_msg lsm;
b4e3ceb9
PP
1763 struct lttcomm_event_command_header *cmd_header = NULL;
1764 size_t cmd_header_len;
1765 uint32_t nb_events, i;
1766 void *extended_at;
9f19cc17 1767
9d697d3d
DG
1768 /* Safety check. An handle and channel name are mandatory */
1769 if (handle == NULL || channel_name == NULL) {
2f70b271 1770 return -LTTNG_ERR_INVALID;
cd80958d
DG
1771 }
1772
53efb85a 1773 memset(&lsm, 0, sizeof(lsm));
cd80958d 1774 lsm.cmd_type = LTTNG_LIST_EVENTS;
cac3069d 1775 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
cd80958d 1776 sizeof(lsm.session.name));
cac3069d 1777 lttng_ctl_copy_string(lsm.u.list.channel_name, channel_name,
cd80958d 1778 sizeof(lsm.u.list.channel_name));
cac3069d 1779 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
9f19cc17 1780
b4e3ceb9
PP
1781 ret = lttng_ctl_ask_sessiond_varlen(&lsm, NULL, 0, (void **) events,
1782 (void **) &cmd_header, &cmd_header_len);
9f19cc17 1783 if (ret < 0) {
b4e3ceb9 1784 goto error;
9f19cc17
DG
1785 }
1786
b4e3ceb9
PP
1787 /* Set number of events and free command header */
1788 nb_events = cmd_header->nb_events;
1789 if (nb_events > INT_MAX) {
1790 ret = -EOVERFLOW;
1791 goto error;
1792 }
1793 ret = (int) nb_events;
1794 free(cmd_header);
1795 cmd_header = NULL;
1796
1797 /* Set extended info pointers */
1798 extended_at = ((void*) (*events)) +
1799 nb_events * sizeof(struct lttng_event);
1800
1801 for (i = 0; i < nb_events; i++) {
1802 struct lttcomm_event_extended_header *ext_header;
1803 struct lttng_event *event = &(*events)[i];
1804
1805 event->extended.ptr = extended_at;
1806 ext_header =
1807 (struct lttcomm_event_extended_header *) extended_at;
1808 extended_at += sizeof(*ext_header);
1809 extended_at += ext_header->filter_len;
795d57ce
PP
1810 extended_at +=
1811 ext_header->nb_exclusions * LTTNG_SYMBOL_NAME_LEN;
b4e3ceb9
PP
1812 }
1813
1814 return ret;
1815error:
1816 free(cmd_header);
1817 free(*events);
1818 return ret;
9f19cc17
DG
1819}
1820
134e72ed
JG
1821int lttng_event_get_filter_expression(struct lttng_event *event,
1822 const char **filter_expression)
d31d3e8c
PP
1823{
1824 int ret = 0;
1825 struct lttcomm_event_extended_header *ext_header;
1826
134e72ed 1827 if (!event || !filter_expression) {
d31d3e8c
PP
1828 ret = -LTTNG_ERR_INVALID;
1829 goto end;
1830 }
1831
1832 ext_header = event->extended.ptr;
1833
1834 if (!ext_header) {
1835 /*
1836 * This can happen since the lttng_event structure is
1837 * used for other tasks where this pointer is never set.
1838 */
134e72ed 1839 *filter_expression = NULL;
d31d3e8c
PP
1840 goto end;
1841 }
1842
1843 if (ext_header->filter_len) {
134e72ed
JG
1844 *filter_expression = ((const char *) (ext_header)) +
1845 sizeof(*ext_header);
d31d3e8c 1846 } else {
134e72ed 1847 *filter_expression = NULL;
d31d3e8c
PP
1848 }
1849
1850end:
1851 return ret;
1852}
b4e3ceb9 1853
f086e50e
PP
1854int lttng_event_get_exclusion_name_count(struct lttng_event *event)
1855{
1856 int ret;
1857 struct lttcomm_event_extended_header *ext_header;
1858
1859 if (!event) {
1860 ret = -LTTNG_ERR_INVALID;
1861 goto end;
1862 }
1863
1864 ext_header = event->extended.ptr;
1865 if (!ext_header) {
1866 /*
1867 * This can happen since the lttng_event structure is
1868 * used for other tasks where this pointer is never set.
1869 */
1870 ret = 0;
1871 goto end;
1872 }
1873
1874 if (ext_header->nb_exclusions > INT_MAX) {
1875 ret = -LTTNG_ERR_OVERFLOW;
1876 goto end;
1877 }
1878 ret = (int) ext_header->nb_exclusions;
1879end:
1880 return ret;
1881}
1882
1883int lttng_event_get_exclusion_name(struct lttng_event *event,
1884 size_t index, const char **exclusion_name)
1885{
1886 int ret = 0;
1887 struct lttcomm_event_extended_header *ext_header;
1888 void *at;
1889
1890 if (!event || !exclusion_name) {
1891 ret = -LTTNG_ERR_INVALID;
1892 goto end;
1893 }
1894
1895 ext_header = event->extended.ptr;
1896 if (!ext_header) {
1897 ret = -LTTNG_ERR_INVALID;
1898 goto end;
1899 }
1900
1901 if (index >= ext_header->nb_exclusions) {
1902 ret = -LTTNG_ERR_INVALID;
1903 goto end;
1904 }
1905
1906 at = (void *) ext_header + sizeof(*ext_header);
1907 at += ext_header->filter_len;
1908 at += index * LTTNG_SYMBOL_NAME_LEN;
1909 *exclusion_name = at;
1910
1911end:
1912 return ret;
1913}
1914
fac6795d 1915/*
1c8d13c8
TD
1916 * Sets the tracing_group variable with name.
1917 * This function allocates memory pointed to by tracing_group.
1918 * On success, returns 0, on error, returns -1 (null name) or -ENOMEM.
fac6795d
DG
1919 */
1920int lttng_set_tracing_group(const char *name)
1921{
9d697d3d 1922 if (name == NULL) {
2f70b271 1923 return -LTTNG_ERR_INVALID;
9d697d3d
DG
1924 }
1925
fac6795d 1926 if (asprintf(&tracing_group, "%s", name) < 0) {
2f70b271 1927 return -LTTNG_ERR_FATAL;
fac6795d
DG
1928 }
1929
1930 return 0;
1931}
1932
cd80958d 1933int lttng_calibrate(struct lttng_handle *handle,
d0254c7c
MD
1934 struct lttng_calibrate *calibrate)
1935{
b812e5ca
PP
1936 /*
1937 * This command was removed in LTTng 2.9.
1938 */
1939 return -LTTNG_ERR_UND;
d0254c7c
MD
1940}
1941
5edd7e09
DG
1942/*
1943 * Set default channel attributes.
441c16a7 1944 * If either or both of the arguments are null, attr content is zeroe'd.
5edd7e09
DG
1945 */
1946void lttng_channel_set_default_attr(struct lttng_domain *domain,
1947 struct lttng_channel_attr *attr)
1948{
1949 /* Safety check */
1950 if (attr == NULL || domain == NULL) {
1951 return;
1952 }
1953
eacaa7a6
DS
1954 memset(attr, 0, sizeof(struct lttng_channel_attr));
1955
0a9c6494
DG
1956 /* Same for all domains. */
1957 attr->overwrite = DEFAULT_CHANNEL_OVERWRITE;
1958 attr->tracefile_size = DEFAULT_CHANNEL_TRACEFILE_SIZE;
1959 attr->tracefile_count = DEFAULT_CHANNEL_TRACEFILE_COUNT;
1960
5edd7e09
DG
1961 switch (domain->type) {
1962 case LTTNG_DOMAIN_KERNEL:
9ae110e2
JG
1963 attr->switch_timer_interval =
1964 DEFAULT_KERNEL_CHANNEL_SWITCH_TIMER;
d92ff3ef 1965 attr->read_timer_interval = DEFAULT_KERNEL_CHANNEL_READ_TIMER;
3e230f92 1966 attr->subbuf_size = default_get_kernel_channel_subbuf_size();
5edd7e09
DG
1967 attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM;
1968 attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
1969 break;
1970 case LTTNG_DOMAIN_UST:
0a9c6494
DG
1971 switch (domain->buf_type) {
1972 case LTTNG_BUFFER_PER_UID:
1973 attr->subbuf_size = default_get_ust_uid_channel_subbuf_size();
1974 attr->num_subbuf = DEFAULT_UST_UID_CHANNEL_SUBBUF_NUM;
1975 attr->output = DEFAULT_UST_UID_CHANNEL_OUTPUT;
9ae110e2
JG
1976 attr->switch_timer_interval =
1977 DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER;
1978 attr->read_timer_interval =
1979 DEFAULT_UST_UID_CHANNEL_READ_TIMER;
0a9c6494
DG
1980 break;
1981 case LTTNG_BUFFER_PER_PID:
1982 default:
1983 attr->subbuf_size = default_get_ust_pid_channel_subbuf_size();
1984 attr->num_subbuf = DEFAULT_UST_PID_CHANNEL_SUBBUF_NUM;
1985 attr->output = DEFAULT_UST_PID_CHANNEL_OUTPUT;
9ae110e2
JG
1986 attr->switch_timer_interval =
1987 DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER;
1988 attr->read_timer_interval =
1989 DEFAULT_UST_PID_CHANNEL_READ_TIMER;
0a9c6494
DG
1990 break;
1991 }
5edd7e09 1992 default:
441c16a7 1993 /* Default behavior: leave set to 0. */
5edd7e09
DG
1994 break;
1995 }
1996}
1997
5ba3702f
JG
1998int lttng_channel_get_discarded_event_count(struct lttng_channel *channel,
1999 uint64_t *discarded_events)
2000{
2001 int ret = 0;
2002 struct lttcomm_channel_extended *chan_ext;
2003
2004 if (!channel || !discarded_events) {
2005 ret = -LTTNG_ERR_INVALID;
2006 goto end;
2007 }
2008
2009 chan_ext = channel->attr.extended.ptr;
2010 if (!chan_ext) {
2011 /*
2012 * This can happen since the lttng_channel structure is
2013 * used for other tasks where this pointer is never set.
2014 */
2015 *discarded_events = 0;
2016 goto end;
2017 }
2018
2019 *discarded_events = chan_ext->discarded_events;
2020end:
2021 return ret;
2022}
2023
2024int lttng_channel_get_lost_packet_count(struct lttng_channel *channel,
2025 uint64_t *lost_packets)
2026{
2027 int ret = 0;
2028 struct lttcomm_channel_extended *chan_ext;
2029
2030 if (!channel || !lost_packets) {
2031 ret = -LTTNG_ERR_INVALID;
2032 goto end;
2033 }
2034
2035 chan_ext = channel->attr.extended.ptr;
2036 if (!chan_ext) {
2037 /*
2038 * This can happen since the lttng_channel structure is
2039 * used for other tasks where this pointer is never set.
2040 */
2041 *lost_packets = 0;
2042 goto end;
2043 }
2044
2045 *lost_packets = chan_ext->lost_packets;
2046end:
2047 return ret;
2048}
2049
fac6795d 2050/*
2269e89e 2051 * Check if session daemon is alive.
fac6795d 2052 *
2269e89e 2053 * Return 1 if alive or 0 if not.
1c8d13c8 2054 * On error returns a negative value.
fac6795d 2055 */
947308c4 2056int lttng_session_daemon_alive(void)
fac6795d
DG
2057{
2058 int ret;
2059
2060 ret = set_session_daemon_path();
2061 if (ret < 0) {
9ae110e2 2062 /* Error. */
fac6795d
DG
2063 return ret;
2064 }
2065
9d035200 2066 if (*sessiond_sock_path == '\0') {
2f70b271 2067 /*
9ae110e2
JG
2068 * No socket path set. Weird error which means the constructor
2069 * was not called.
2f70b271
DG
2070 */
2071 assert(0);
fac6795d
DG
2072 }
2073
2269e89e 2074 ret = try_connect_sessiond(sessiond_sock_path);
7d8234d9 2075 if (ret < 0) {
9ae110e2 2076 /* Not alive. */
7d8234d9
MD
2077 return 0;
2078 }
7d8234d9 2079
9ae110e2 2080 /* Is alive. */
947308c4 2081 return 1;
fac6795d
DG
2082}
2083
00e2e675 2084/*
a4b92340 2085 * Set URL for a consumer for a session and domain.
00e2e675
DG
2086 *
2087 * Return 0 on success, else a negative value.
2088 */
a4b92340
DG
2089int lttng_set_consumer_url(struct lttng_handle *handle,
2090 const char *control_url, const char *data_url)
00e2e675 2091{
3dd05a85 2092 int ret;
a4b92340 2093 ssize_t size;
00e2e675 2094 struct lttcomm_session_msg lsm;
a4b92340 2095 struct lttng_uri *uris = NULL;
00e2e675 2096
a4b92340 2097 if (handle == NULL || (control_url == NULL && data_url == NULL)) {
2f70b271 2098 return -LTTNG_ERR_INVALID;
00e2e675
DG
2099 }
2100
a4b92340
DG
2101 memset(&lsm, 0, sizeof(lsm));
2102
00e2e675
DG
2103 lsm.cmd_type = LTTNG_SET_CONSUMER_URI;
2104
cac3069d 2105 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
00e2e675 2106 sizeof(lsm.session.name));
cac3069d 2107 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
00e2e675 2108
bc894455 2109 size = uri_parse_str_urls(control_url, data_url, &uris);
a4b92340 2110 if (size < 0) {
2f70b271 2111 return -LTTNG_ERR_INVALID;
a4b92340
DG
2112 }
2113
2114 lsm.u.uri.size = size;
00e2e675 2115
795a978d 2116 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris,
cac3069d 2117 sizeof(struct lttng_uri) * size, NULL);
3dd05a85
DG
2118
2119 free(uris);
2120 return ret;
00e2e675
DG
2121}
2122
2123/*
9c6bda17 2124 * [OBSOLETE]
00e2e675
DG
2125 */
2126int lttng_enable_consumer(struct lttng_handle *handle)
2127{
785d2d0d 2128 return -ENOSYS;
00e2e675
DG
2129}
2130
2131/*
9c6bda17 2132 * [OBSOLETE]
00e2e675
DG
2133 */
2134int lttng_disable_consumer(struct lttng_handle *handle)
2135{
785d2d0d 2136 return -ENOSYS;
00e2e675
DG
2137}
2138
07424f16
DG
2139/*
2140 * This is an extension of create session that is ONLY and SHOULD only be used
2141 * by the lttng command line program. It exists to avoid using URI parsing in
2142 * the lttng client.
2143 *
2144 * We need the date and time for the trace path subdirectory for the case where
2145 * the user does NOT define one using either -o or -U. Using the normal
2146 * lttng_create_session API call, we have no clue on the session daemon side if
2147 * the URL was generated automatically by the client or define by the user.
2148 *
2149 * So this function "wrapper" is hidden from the public API, takes the datetime
2150 * string and appends it if necessary to the URI subdirectory before sending it
2151 * to the session daemon.
2152 *
2153 * With this extra function, the lttng_create_session call behavior is not
2154 * changed and the timestamp is appended to the URI on the session daemon side
2155 * if necessary.
2156 */
2157int _lttng_create_session_ext(const char *name, const char *url,
2158 const char *datetime)
2159{
3dd05a85 2160 int ret;
07424f16
DG
2161 ssize_t size;
2162 struct lttcomm_session_msg lsm;
2163 struct lttng_uri *uris = NULL;
2164
2bba9e53 2165 if (name == NULL || datetime == NULL) {
2f70b271 2166 return -LTTNG_ERR_INVALID;
07424f16
DG
2167 }
2168
2169 memset(&lsm, 0, sizeof(lsm));
2170
2171 lsm.cmd_type = LTTNG_CREATE_SESSION;
cac3069d 2172 lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
07424f16 2173
9ae110e2 2174 /* There should never be a data URL. */
bc894455 2175 size = uri_parse_str_urls(url, NULL, &uris);
07424f16 2176 if (size < 0) {
3dd05a85
DG
2177 ret = -LTTNG_ERR_INVALID;
2178 goto error;
07424f16
DG
2179 }
2180
2181 lsm.u.uri.size = size;
2182
4b35a6b3 2183 if (size > 0 && uris[0].dtype != LTTNG_DST_PATH && strlen(uris[0].subdir) == 0) {
da4aa2b8
DG
2184 /* Don't append datetime if the name was automatically created. */
2185 if (strncmp(name, DEFAULT_SESSION_NAME "-",
2186 strlen(DEFAULT_SESSION_NAME) + 1)) {
2187 ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s-%s",
2188 name, datetime);
2189 } else {
2190 ret = snprintf(uris[0].subdir, sizeof(uris[0].subdir), "%s", name);
2191 }
07424f16
DG
2192 if (ret < 0) {
2193 PERROR("snprintf uri subdir");
3dd05a85
DG
2194 ret = -LTTNG_ERR_FATAL;
2195 goto error;
07424f16
DG
2196 }
2197 }
2198
795a978d 2199 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris,
cac3069d 2200 sizeof(struct lttng_uri) * size, NULL);
3dd05a85
DG
2201
2202error:
2203 free(uris);
2204 return ret;
07424f16
DG
2205}
2206
806e2684
DG
2207/*
2208 * For a given session name, this call checks if the data is ready to be read
2209 * or is still being extracted by the consumer(s) hence not ready to be used by
2210 * any readers.
2211 */
6d805429 2212int lttng_data_pending(const char *session_name)
806e2684
DG
2213{
2214 int ret;
2215 struct lttcomm_session_msg lsm;
f6151c55 2216 uint8_t *pending = NULL;
806e2684
DG
2217
2218 if (session_name == NULL) {
2219 return -LTTNG_ERR_INVALID;
2220 }
2221
53efb85a 2222 memset(&lsm, 0, sizeof(lsm));
6d805429 2223 lsm.cmd_type = LTTNG_DATA_PENDING;
806e2684 2224
cac3069d
DG
2225 lttng_ctl_copy_string(lsm.session.name, session_name,
2226 sizeof(lsm.session.name));
806e2684 2227
f6151c55
JG
2228 ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pending);
2229 if (ret < 0) {
2230 goto end;
2231 } else if (ret != 1) {
2232 /* Unexpected payload size */
2233 ret = -LTTNG_ERR_INVALID;
2234 goto end;
806e2684
DG
2235 }
2236
f6151c55
JG
2237 ret = (int) *pending;
2238end:
2239 free(pending);
806e2684
DG
2240 return ret;
2241}
2242
27babd3a
DG
2243/*
2244 * Create a session exclusively used for snapshot.
2245 *
2246 * Returns LTTNG_OK on success or a negative error code.
2247 */
2248int lttng_create_session_snapshot(const char *name, const char *snapshot_url)
2249{
2250 int ret;
2251 ssize_t size;
2252 struct lttcomm_session_msg lsm;
2253 struct lttng_uri *uris = NULL;
2254
2255 if (name == NULL) {
2256 return -LTTNG_ERR_INVALID;
2257 }
2258
2259 memset(&lsm, 0, sizeof(lsm));
2260
2261 lsm.cmd_type = LTTNG_CREATE_SESSION_SNAPSHOT;
2262 lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
2263
2264 size = uri_parse_str_urls(snapshot_url, NULL, &uris);
2265 if (size < 0) {
2266 return -LTTNG_ERR_INVALID;
2267 }
2268
2269 lsm.u.uri.size = size;
2270
795a978d 2271 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris,
27babd3a
DG
2272 sizeof(struct lttng_uri) * size, NULL);
2273
2274 free(uris);
2275 return ret;
2276}
2277
ecc48a90
JD
2278/*
2279 * Create a session exclusively used for live.
2280 *
2281 * Returns LTTNG_OK on success or a negative error code.
2282 */
2283int lttng_create_session_live(const char *name, const char *url,
2284 unsigned int timer_interval)
2285{
2286 int ret;
2287 ssize_t size;
2288 struct lttcomm_session_msg lsm;
2289 struct lttng_uri *uris = NULL;
2290
92805ee4 2291 if (name == NULL || timer_interval == 0) {
ecc48a90
JD
2292 return -LTTNG_ERR_INVALID;
2293 }
2294
2295 memset(&lsm, 0, sizeof(lsm));
2296
2297 lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE;
2298 lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
2299
1a241656
DG
2300 if (url) {
2301 size = uri_parse_str_urls(url, NULL, &uris);
2302 if (size <= 0) {
2303 ret = -LTTNG_ERR_INVALID;
2304 goto end;
2305 }
ecc48a90 2306
1a241656
DG
2307 /* file:// is not accepted for live session. */
2308 if (uris[0].dtype == LTTNG_DST_PATH) {
2309 ret = -LTTNG_ERR_INVALID;
2310 goto end;
2311 }
2312 } else {
2313 size = 0;
ecc48a90
JD
2314 }
2315
2316 lsm.u.session_live.nb_uri = size;
2317 lsm.u.session_live.timer_interval = timer_interval;
2318
795a978d 2319 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, uris,
ecc48a90
JD
2320 sizeof(struct lttng_uri) * size, NULL);
2321
2322end:
2323 free(uris);
2324 return ret;
2325}
2326
a5dfbb9d
MD
2327/*
2328 * List PIDs in the tracker.
2329 *
1b18ce93
JG
2330 * enabled is set to whether the PID tracker is enabled.
2331 * pids is set to an allocated array of PIDs currently tracked. On
2332 * success, pids must be freed by the caller.
2333 * nr_pids is set to the number of entries contained by the pids array.
a5dfbb9d
MD
2334 *
2335 * Returns 0 on success, else a negative LTTng error code.
2336 */
2337int lttng_list_tracker_pids(struct lttng_handle *handle,
2338 int *_enabled, int32_t **_pids, size_t *_nr_pids)
2339{
ebbf5ab7
JR
2340 int ret;
2341 int enabled = 1;
a5dfbb9d
MD
2342 struct lttcomm_session_msg lsm;
2343 size_t nr_pids;
2344 int32_t *pids;
2345
2346 if (handle == NULL) {
2347 return -LTTNG_ERR_INVALID;
2348 }
2349
2350 memset(&lsm, 0, sizeof(lsm));
2351 lsm.cmd_type = LTTNG_LIST_TRACKER_PIDS;
2352 lttng_ctl_copy_string(lsm.session.name, handle->session_name,
2353 sizeof(lsm.session.name));
2354 lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
2355
2356 ret = lttng_ctl_ask_sessiond(&lsm, (void **) &pids);
2357 if (ret < 0) {
2358 return ret;
2359 }
2360 nr_pids = ret / sizeof(int32_t);
2361 if (nr_pids == 1 && pids[0] == -1) {
2362 free(pids);
2363 pids = NULL;
2364 enabled = 0;
2365 nr_pids = 0;
2366 }
2367 *_enabled = enabled;
2368 *_pids = pids;
2369 *_nr_pids = nr_pids;
2370 return 0;
2371}
2372
93ec662e
JD
2373/*
2374 * Regenerate the metadata for a session.
2375 * Return 0 on success, a negative error code on error.
2376 */
eded6438 2377int lttng_regenerate_metadata(const char *session_name)
93ec662e
JD
2378{
2379 int ret;
2380 struct lttcomm_session_msg lsm;
2381
2382 if (!session_name) {
2383 ret = -LTTNG_ERR_INVALID;
2384 goto end;
2385 }
2386
2387 memset(&lsm, 0, sizeof(lsm));
eded6438 2388 lsm.cmd_type = LTTNG_REGENERATE_METADATA;
93ec662e
JD
2389
2390 lttng_ctl_copy_string(lsm.session.name, session_name,
2391 sizeof(lsm.session.name));
2392
2393 ret = lttng_ctl_ask_sessiond(&lsm, NULL);
2394 if (ret < 0) {
2395 goto end;
2396 }
2397
2398 ret = 0;
2399end:
2400 return ret;
2401}
2402
eded6438
JD
2403/*
2404 * Deprecated, replaced by lttng_regenerate_metadata.
2405 */
2406int lttng_metadata_regenerate(const char *session_name)
2407{
2408 return lttng_regenerate_metadata(session_name);
2409}
2410
c2561365
JD
2411/*
2412 * Regenerate the statedump of a session.
2413 * Return 0 on success, a negative error code on error.
2414 */
2415int lttng_regenerate_statedump(const char *session_name)
2416{
2417 int ret;
2418 struct lttcomm_session_msg lsm;
2419
2420 if (!session_name) {
2421 ret = -LTTNG_ERR_INVALID;
2422 goto end;
2423 }
2424
2425 memset(&lsm, 0, sizeof(lsm));
2426 lsm.cmd_type = LTTNG_REGENERATE_STATEDUMP;
2427
2428 lttng_ctl_copy_string(lsm.session.name, session_name,
2429 sizeof(lsm.session.name));
2430
2431 ret = lttng_ctl_ask_sessiond(&lsm, NULL);
2432 if (ret < 0) {
2433 goto end;
2434 }
2435
2436 ret = 0;
2437end:
2438 return ret;
2439}
2440
a58c490f
JG
2441int lttng_register_trigger(struct lttng_trigger *trigger)
2442{
2443 int ret;
2444 struct lttcomm_session_msg lsm;
2445 char *trigger_buf = NULL;
2446 ssize_t trigger_size;
2447
2448 if (!trigger) {
2449 ret = -LTTNG_ERR_INVALID;
2450 goto end;
2451 }
2452
2453 if (!lttng_trigger_validate(trigger)) {
2454 ret = -LTTNG_ERR_INVALID;
2455 goto end;
2456 }
2457
2458 trigger_size = lttng_trigger_serialize(trigger, NULL);
2459 if (trigger_size < 0) {
2460 ret = -LTTNG_ERR_UNK;
2461 goto end;
2462 }
2463
2464 trigger_buf = zmalloc(trigger_size);
2465 if (!trigger_buf) {
2466 ret = -LTTNG_ERR_NOMEM;
2467 goto end;
2468 }
2469
2470 memset(&lsm, 0, sizeof(lsm));
2471 lsm.cmd_type = LTTNG_REGISTER_TRIGGER;
2472 if (lttng_trigger_serialize(trigger, trigger_buf) < 0) {
2473 ret = -LTTNG_ERR_UNK;
2474 goto end;
2475 }
2476
2477 lsm.u.trigger.length = (uint32_t) trigger_size;
2478 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, trigger_buf,
2479 trigger_size, NULL);
2480end:
2481 free(trigger_buf);
2482 return ret;
2483}
2484
2485int lttng_unregister_trigger(struct lttng_trigger *trigger)
2486{
2487 int ret;
2488 struct lttcomm_session_msg lsm;
2489 char *trigger_buf = NULL;
2490 ssize_t trigger_size;
2491
2492 if (!trigger) {
2493 ret = -LTTNG_ERR_INVALID;
2494 goto end;
2495 }
2496
2497 if (!lttng_trigger_validate(trigger)) {
2498 ret = -LTTNG_ERR_INVALID;
2499 goto end;
2500 }
2501
2502 trigger_size = lttng_trigger_serialize(trigger, NULL);
2503 if (trigger_size < 0) {
2504 ret = -LTTNG_ERR_UNK;
2505 goto end;
2506 }
2507
2508 trigger_buf = zmalloc(trigger_size);
2509 if (!trigger_buf) {
2510 ret = -LTTNG_ERR_NOMEM;
2511 goto end;
2512 }
2513
2514 memset(&lsm, 0, sizeof(lsm));
2515 lsm.cmd_type = LTTNG_UNREGISTER_TRIGGER;
2516 if (lttng_trigger_serialize(trigger, trigger_buf) < 0) {
2517 ret = -LTTNG_ERR_UNK;
2518 goto end;
2519 }
2520
2521 lsm.u.trigger.length = (uint32_t) trigger_size;
2522 ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(&lsm, trigger_buf,
2523 trigger_size, NULL);
2524end:
2525 free(trigger_buf);
2526 return ret;
2527}
2528
fac6795d 2529/*
9ae110e2 2530 * lib constructor.
fac6795d 2531 */
b2b89e8a 2532static void __attribute__((constructor)) init(void)
fac6795d
DG
2533{
2534 /* Set default session group */
bbccc3d2 2535 lttng_set_tracing_group(DEFAULT_TRACING_GROUP);
fac6795d 2536}
49cca668
DG
2537
2538/*
9ae110e2 2539 * lib destructor.
49cca668 2540 */
b2b89e8a 2541static void __attribute__((destructor)) lttng_ctl_exit(void)
49cca668
DG
2542{
2543 free(tracing_group);
2544}
This page took 0.318479 seconds and 4 git commands to generate.