6 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; only
11 * version 2.1 of the License.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * Mimic system calls for:
24 * - session creation, returns an object descriptor or failure.
25 * - channel creation, returns an object descriptor or failure.
26 * - Operates on a session object descriptor
27 * - Takes all channel options as parameters.
28 * - stream get, returns an object descriptor or failure.
29 * - Operates on a channel object descriptor.
30 * - stream notifier get, returns an object descriptor or failure.
31 * - Operates on a channel object descriptor.
32 * - event creation, returns an object descriptor or failure.
33 * - Operates on a channel object descriptor
34 * - Takes an event name as parameter
35 * - Takes an instrumentation source as parameter
36 * - e.g. tracepoints, dynamic_probes...
37 * - Takes instrumentation source specific arguments.
44 #include <urcu/compiler.h>
45 #include <urcu/list.h>
48 #include <lttng/tracepoint.h>
49 #include <lttng/ust-abi.h>
50 #include <lttng/ust-error.h>
51 #include <lttng/ust-events.h>
52 #include <lttng/ust-version.h>
54 #include <usterr-signal-safe.h>
56 #include "../libringbuffer/frontend_types.h"
57 #include "../libringbuffer/shm.h"
58 #include "lttng-tracer.h"
59 #include "string-utils.h"
60 #include "ust-events-internal.h"
62 #define OBJ_NAME_LEN 16
64 static int lttng_ust_abi_close_in_progress
;
67 int lttng_abi_tracepoint_list(void *owner
);
69 int lttng_abi_tracepoint_field_list(void *owner
);
72 * Object descriptor table. Should be protected from concurrent access
76 struct lttng_ust_obj
{
80 const struct lttng_ust_objd_ops
*ops
;
82 int owner_ref
; /* has ref from owner */
84 char name
[OBJ_NAME_LEN
];
86 int freelist_next
; /* offset freelist. end is -1. */
90 struct lttng_ust_objd_table
{
91 struct lttng_ust_obj
*array
;
92 unsigned int len
, allocated_len
;
93 int freelist_head
; /* offset freelist head. end is -1 */
96 static struct lttng_ust_objd_table objd_table
= {
101 int objd_alloc(void *private_data
, const struct lttng_ust_objd_ops
*ops
,
102 void *owner
, const char *name
)
104 struct lttng_ust_obj
*obj
;
106 if (objd_table
.freelist_head
!= -1) {
107 obj
= &objd_table
.array
[objd_table
.freelist_head
];
108 objd_table
.freelist_head
= obj
->u
.freelist_next
;
112 if (objd_table
.len
>= objd_table
.allocated_len
) {
113 unsigned int new_allocated_len
, old_allocated_len
;
114 struct lttng_ust_obj
*new_table
, *old_table
;
116 old_allocated_len
= objd_table
.allocated_len
;
117 old_table
= objd_table
.array
;
118 if (!old_allocated_len
)
119 new_allocated_len
= 1;
121 new_allocated_len
= old_allocated_len
<< 1;
122 new_table
= zmalloc(sizeof(struct lttng_ust_obj
) * new_allocated_len
);
125 memcpy(new_table
, old_table
,
126 sizeof(struct lttng_ust_obj
) * old_allocated_len
);
128 objd_table
.array
= new_table
;
129 objd_table
.allocated_len
= new_allocated_len
;
131 obj
= &objd_table
.array
[objd_table
.len
];
134 obj
->u
.s
.private_data
= private_data
;
136 obj
->u
.s
.f_count
= 2; /* count == 1 : object is allocated */
137 /* count == 2 : allocated + hold ref */
138 obj
->u
.s
.owner_ref
= 1; /* One owner reference */
139 obj
->u
.s
.owner
= owner
;
140 strncpy(obj
->u
.s
.name
, name
, OBJ_NAME_LEN
);
141 obj
->u
.s
.name
[OBJ_NAME_LEN
- 1] = '\0';
142 return obj
- objd_table
.array
;
146 struct lttng_ust_obj
*_objd_get(int id
)
148 if (id
>= objd_table
.len
)
150 if (!objd_table
.array
[id
].u
.s
.f_count
)
152 return &objd_table
.array
[id
];
156 void *objd_private(int id
)
158 struct lttng_ust_obj
*obj
= _objd_get(id
);
160 return obj
->u
.s
.private_data
;
164 void objd_set_private(int id
, void *private_data
)
166 struct lttng_ust_obj
*obj
= _objd_get(id
);
168 obj
->u
.s
.private_data
= private_data
;
171 const struct lttng_ust_objd_ops
*objd_ops(int id
)
173 struct lttng_ust_obj
*obj
= _objd_get(id
);
181 void objd_free(int id
)
183 struct lttng_ust_obj
*obj
= _objd_get(id
);
186 obj
->u
.freelist_next
= objd_table
.freelist_head
;
187 objd_table
.freelist_head
= obj
- objd_table
.array
;
188 assert(obj
->u
.s
.f_count
== 1);
189 obj
->u
.s
.f_count
= 0; /* deallocated */
193 void objd_ref(int id
)
195 struct lttng_ust_obj
*obj
= _objd_get(id
);
200 int lttng_ust_objd_unref(int id
, int is_owner
)
202 struct lttng_ust_obj
*obj
= _objd_get(id
);
206 if (obj
->u
.s
.f_count
== 1) {
207 ERR("Reference counting error\n");
211 if (!obj
->u
.s
.owner_ref
) {
212 ERR("Error decrementing owner reference");
215 obj
->u
.s
.owner_ref
--;
217 if ((--obj
->u
.s
.f_count
) == 1) {
218 const struct lttng_ust_objd_ops
*ops
= objd_ops(id
);
228 void objd_table_destroy(void)
232 for (i
= 0; i
< objd_table
.allocated_len
; i
++) {
233 struct lttng_ust_obj
*obj
;
238 if (!obj
->u
.s
.owner_ref
)
239 continue; /* only unref owner ref. */
240 (void) lttng_ust_objd_unref(i
, 1);
242 free(objd_table
.array
);
243 objd_table
.array
= NULL
;
245 objd_table
.allocated_len
= 0;
246 objd_table
.freelist_head
= -1;
249 const char *lttng_ust_obj_get_name(int id
)
251 struct lttng_ust_obj
*obj
= _objd_get(id
);
255 return obj
->u
.s
.name
;
258 void lttng_ust_objd_table_owner_cleanup(void *owner
)
262 for (i
= 0; i
< objd_table
.allocated_len
; i
++) {
263 struct lttng_ust_obj
*obj
;
269 continue; /* skip root handles */
270 if (!obj
->u
.s
.owner_ref
)
271 continue; /* only unref owner ref. */
272 if (obj
->u
.s
.owner
== owner
)
273 (void) lttng_ust_objd_unref(i
, 1);
278 * This is LTTng's own personal way to create an ABI for sessiond.
279 * We send commands over a socket.
282 static const struct lttng_ust_objd_ops lttng_ops
;
283 static const struct lttng_ust_objd_ops lttng_session_ops
;
284 static const struct lttng_ust_objd_ops lttng_channel_ops
;
285 static const struct lttng_ust_objd_ops lttng_event_enabler_ops
;
286 static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops
;
287 static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops
;
289 int lttng_abi_create_root_handle(void)
293 /* root handles have NULL owners */
294 root_handle
= objd_alloc(NULL
, <tng_ops
, NULL
, "root");
299 int lttng_is_channel_ready(struct lttng_channel
*lttng_chan
)
301 struct channel
*chan
;
302 unsigned int nr_streams
, exp_streams
;
304 chan
= lttng_chan
->chan
;
305 nr_streams
= channel_handle_get_nr_streams(lttng_chan
->handle
);
306 exp_streams
= chan
->nr_streams
;
307 return nr_streams
== exp_streams
;
311 int lttng_abi_create_session(void *owner
)
313 struct lttng_session
*session
;
314 int session_objd
, ret
;
316 session
= lttng_session_create();
319 session_objd
= objd_alloc(session
, <tng_session_ops
, owner
, "session");
320 if (session_objd
< 0) {
324 session
->objd
= session_objd
;
325 session
->owner
= owner
;
329 lttng_session_destroy(session
);
334 long lttng_abi_tracer_version(int objd
,
335 struct lttng_ust_tracer_version
*v
)
337 v
->major
= LTTNG_UST_MAJOR_VERSION
;
338 v
->minor
= LTTNG_UST_MINOR_VERSION
;
339 v
->patchlevel
= LTTNG_UST_PATCHLEVEL_VERSION
;
344 long lttng_abi_add_context(int objd
,
345 struct lttng_ust_context
*context_param
,
346 union ust_args
*uargs
,
347 struct lttng_ctx
**ctx
, struct lttng_session
*session
)
349 return lttng_attach_context(context_param
, uargs
, ctx
, session
);
353 * lttng_cmd - lttng control through socket commands
355 * @objd: the object descriptor
358 * @uargs: UST arguments (internal)
361 * This descriptor implements lttng commands:
363 * Returns a LTTng trace session object descriptor
364 * LTTNG_UST_TRACER_VERSION
365 * Returns the LTTng kernel tracer version
366 * LTTNG_UST_TRACEPOINT_LIST
367 * Returns a file descriptor listing available tracepoints
368 * LTTNG_UST_TRACEPOINT_FIELD_LIST
369 * Returns a file descriptor listing available tracepoint fields
370 * LTTNG_UST_WAIT_QUIESCENT
371 * Returns after all previously running probes have completed
373 * The returned session will be deleted when its file descriptor is closed.
376 long lttng_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
377 union ust_args
*uargs
, void *owner
)
380 case LTTNG_UST_SESSION
:
381 return lttng_abi_create_session(owner
);
382 case LTTNG_UST_TRACER_VERSION
:
383 return lttng_abi_tracer_version(objd
,
384 (struct lttng_ust_tracer_version
*) arg
);
385 case LTTNG_UST_TRACEPOINT_LIST
:
386 return lttng_abi_tracepoint_list(owner
);
387 case LTTNG_UST_TRACEPOINT_FIELD_LIST
:
388 return lttng_abi_tracepoint_field_list(owner
);
389 case LTTNG_UST_WAIT_QUIESCENT
:
397 static const struct lttng_ust_objd_ops lttng_ops
= {
401 int lttng_abi_map_channel(int session_objd
,
402 struct lttng_ust_channel
*ust_chan
,
403 union ust_args
*uargs
,
406 struct lttng_session
*session
= objd_private(session_objd
);
407 const char *transport_name
;
408 const struct lttng_transport
*transport
;
409 const char *chan_name
;
411 struct lttng_ust_shm_handle
*channel_handle
;
412 struct lttng_channel
*lttng_chan
;
413 struct channel
*chan
;
414 struct lttng_ust_lib_ring_buffer_config
*config
;
419 enum lttng_ust_chan_type type
;
421 chan_data
= uargs
->channel
.chan_data
;
422 wakeup_fd
= uargs
->channel
.wakeup_fd
;
424 type
= ust_chan
->type
;
427 case LTTNG_UST_CHAN_PER_CPU
:
434 if (session
->been_active
) {
436 goto active
; /* Refuse to add channel to active session */
439 channel_handle
= channel_handle_create(chan_data
, len
, wakeup_fd
);
440 if (!channel_handle
) {
445 chan
= shmp(channel_handle
, channel_handle
->chan
);
447 chan
->handle
= channel_handle
;
448 config
= &chan
->backend
.config
;
449 lttng_chan
= channel_get_private(chan
);
455 /* Lookup transport name */
457 case LTTNG_UST_CHAN_PER_CPU
:
458 if (config
->output
== RING_BUFFER_MMAP
) {
459 if (config
->mode
== RING_BUFFER_OVERWRITE
) {
460 if (config
->wakeup
== RING_BUFFER_WAKEUP_BY_WRITER
) {
461 transport_name
= "relay-overwrite-mmap";
463 transport_name
= "relay-overwrite-rt-mmap";
466 if (config
->wakeup
== RING_BUFFER_WAKEUP_BY_WRITER
) {
467 transport_name
= "relay-discard-mmap";
469 transport_name
= "relay-discard-rt-mmap";
476 chan_name
= "channel";
482 transport
= lttng_transport_find(transport_name
);
484 DBG("LTTng transport %s not found\n",
490 chan_objd
= objd_alloc(NULL
, <tng_channel_ops
, owner
, chan_name
);
496 /* Initialize our lttng chan */
497 lttng_chan
->chan
= chan
;
498 lttng_chan
->tstate
= 1;
499 lttng_chan
->enabled
= 1;
500 lttng_chan
->ctx
= NULL
;
501 lttng_chan
->session
= session
;
502 lttng_chan
->ops
= &transport
->ops
;
503 memcpy(<tng_chan
->chan
->backend
.config
,
504 transport
->client_config
,
505 sizeof(lttng_chan
->chan
->backend
.config
));
506 cds_list_add(<tng_chan
->node
, &session
->chan_head
);
507 lttng_chan
->header_type
= 0;
508 lttng_chan
->handle
= channel_handle
;
509 lttng_chan
->type
= type
;
512 * We tolerate no failure path after channel creation. It will stay
513 * invariant for the rest of the session.
515 objd_set_private(chan_objd
, lttng_chan
);
516 lttng_chan
->objd
= chan_objd
;
517 /* The channel created holds a reference on the session */
518 objd_ref(session_objd
);
521 /* error path after channel was created */
525 channel_destroy(chan
, channel_handle
, 0);
529 * error path before channel creation (owning chan_data and
538 lttng_ust_lock_fd_tracker();
539 close_ret
= close(wakeup_fd
);
540 lttng_ust_unlock_fd_tracker();
550 * lttng_session_cmd - lttng session object command
555 * @uargs: UST arguments (internal)
558 * This descriptor implements lttng commands:
560 * Returns a LTTng channel object descriptor
562 * Enables tracing for a session (weak enable)
564 * Disables tracing for a session (strong disable)
566 * The returned channel will be deleted when its file descriptor is closed.
569 long lttng_session_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
570 union ust_args
*uargs
, void *owner
)
572 struct lttng_session
*session
= objd_private(objd
);
575 case LTTNG_UST_CHANNEL
:
576 return lttng_abi_map_channel(objd
,
577 (struct lttng_ust_channel
*) arg
,
579 case LTTNG_UST_SESSION_START
:
580 case LTTNG_UST_ENABLE
:
581 return lttng_session_enable(session
);
582 case LTTNG_UST_SESSION_STOP
:
583 case LTTNG_UST_DISABLE
:
584 return lttng_session_disable(session
);
585 case LTTNG_UST_SESSION_STATEDUMP
:
586 return lttng_session_statedump(session
);
593 * Called when the last file reference is dropped.
595 * Big fat note: channels and events are invariant for the whole session after
596 * their creation. So this session destruction also destroys all channel and
597 * event structures specific to this session (they are not destroyed when their
598 * individual file is released).
601 int lttng_release_session(int objd
)
603 struct lttng_session
*session
= objd_private(objd
);
606 lttng_session_destroy(session
);
613 static const struct lttng_ust_objd_ops lttng_session_ops
= {
614 .release
= lttng_release_session
,
615 .cmd
= lttng_session_cmd
,
619 long lttng_tracepoint_list_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
620 union ust_args
*uargs
, void *owner
)
622 struct lttng_ust_tracepoint_list
*list
= objd_private(objd
);
623 struct lttng_ust_tracepoint_iter
*tp
=
624 (struct lttng_ust_tracepoint_iter
*) arg
;
625 struct lttng_ust_tracepoint_iter
*iter
;
628 case LTTNG_UST_TRACEPOINT_LIST_GET
:
630 iter
= lttng_ust_tracepoint_list_get_iter_next(list
);
632 return -LTTNG_UST_ERR_NOENT
;
633 memcpy(tp
, iter
, sizeof(*tp
));
642 int lttng_abi_tracepoint_list(void *owner
)
645 struct lttng_ust_tracepoint_list
*list
;
647 list_objd
= objd_alloc(NULL
, <tng_tracepoint_list_ops
, owner
, "tp_list");
652 list
= zmalloc(sizeof(*list
));
657 objd_set_private(list_objd
, list
);
659 /* populate list by walking on all registered probes. */
660 ret
= lttng_probes_get_event_list(list
);
672 err
= lttng_ust_objd_unref(list_objd
, 1);
680 int lttng_release_tracepoint_list(int objd
)
682 struct lttng_ust_tracepoint_list
*list
= objd_private(objd
);
685 lttng_probes_prune_event_list(list
);
693 static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops
= {
694 .release
= lttng_release_tracepoint_list
,
695 .cmd
= lttng_tracepoint_list_cmd
,
699 long lttng_tracepoint_field_list_cmd(int objd
, unsigned int cmd
,
700 unsigned long arg
, union ust_args
*uargs
, void *owner
)
702 struct lttng_ust_field_list
*list
= objd_private(objd
);
703 struct lttng_ust_field_iter
*tp
= &uargs
->field_list
.entry
;
704 struct lttng_ust_field_iter
*iter
;
707 case LTTNG_UST_TRACEPOINT_FIELD_LIST_GET
:
709 iter
= lttng_ust_field_list_get_iter_next(list
);
711 return -LTTNG_UST_ERR_NOENT
;
712 memcpy(tp
, iter
, sizeof(*tp
));
721 int lttng_abi_tracepoint_field_list(void *owner
)
724 struct lttng_ust_field_list
*list
;
726 list_objd
= objd_alloc(NULL
, <tng_tracepoint_field_list_ops
, owner
,
732 list
= zmalloc(sizeof(*list
));
737 objd_set_private(list_objd
, list
);
739 /* populate list by walking on all registered probes. */
740 ret
= lttng_probes_get_field_list(list
);
752 err
= lttng_ust_objd_unref(list_objd
, 1);
760 int lttng_release_tracepoint_field_list(int objd
)
762 struct lttng_ust_field_list
*list
= objd_private(objd
);
765 lttng_probes_prune_field_list(list
);
773 static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops
= {
774 .release
= lttng_release_tracepoint_field_list
,
775 .cmd
= lttng_tracepoint_field_list_cmd
,
779 int lttng_abi_map_stream(int channel_objd
, struct lttng_ust_stream
*info
,
780 union ust_args
*uargs
, void *owner
)
782 struct lttng_channel
*channel
= objd_private(channel_objd
);
785 ret
= channel_handle_add_stream(channel
->handle
,
786 uargs
->stream
.shm_fd
, uargs
->stream
.wakeup_fd
,
787 info
->stream_nr
, info
->len
);
789 goto error_add_stream
;
798 int lttng_abi_create_event_enabler(int channel_objd
,
799 struct lttng_ust_event
*event_param
,
801 enum lttng_enabler_format_type format_type
)
803 struct lttng_channel
*channel
= objd_private(channel_objd
);
804 struct lttng_event_enabler
*enabler
;
807 event_param
->name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
808 event_objd
= objd_alloc(NULL
, <tng_event_enabler_ops
, owner
,
810 if (event_objd
< 0) {
815 * We tolerate no failure path after event creation. It will stay
816 * invariant for the rest of the session.
818 enabler
= lttng_event_enabler_create(format_type
, event_param
, channel
);
823 objd_set_private(event_objd
, enabler
);
824 /* The event holds a reference on the channel */
825 objd_ref(channel_objd
);
832 err
= lttng_ust_objd_unref(event_objd
, 1);
840 * lttng_channel_cmd - lttng control through object descriptors
842 * @objd: the object descriptor
845 * @uargs: UST arguments (internal)
848 * This object descriptor implements lttng commands:
850 * Returns an event stream object descriptor or failure.
851 * (typically, one event stream records events from one CPU)
853 * Returns an event object descriptor or failure.
855 * Prepend a context field to each event in the channel
857 * Enable recording for events in this channel (weak enable)
859 * Disable recording for events in this channel (strong disable)
861 * Channel and event file descriptors also hold a reference on the session.
864 long lttng_channel_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
865 union ust_args
*uargs
, void *owner
)
867 struct lttng_channel
*channel
= objd_private(objd
);
869 if (cmd
!= LTTNG_UST_STREAM
) {
871 * Check if channel received all streams.
873 if (!lttng_is_channel_ready(channel
))
878 case LTTNG_UST_STREAM
:
880 struct lttng_ust_stream
*stream
;
882 stream
= (struct lttng_ust_stream
*) arg
;
883 /* stream used as output */
884 return lttng_abi_map_stream(objd
, stream
, uargs
, owner
);
886 case LTTNG_UST_EVENT
:
888 struct lttng_ust_event
*event_param
=
889 (struct lttng_ust_event
*) arg
;
891 if (strutils_is_star_glob_pattern(event_param
->name
)) {
893 * If the event name is a star globbing pattern,
894 * we create the special star globbing enabler.
896 return lttng_abi_create_event_enabler(objd
, event_param
,
897 owner
, LTTNG_ENABLER_FORMAT_STAR_GLOB
);
899 return lttng_abi_create_event_enabler(objd
, event_param
,
900 owner
, LTTNG_ENABLER_FORMAT_EVENT
);
903 case LTTNG_UST_CONTEXT
:
904 return lttng_abi_add_context(objd
,
905 (struct lttng_ust_context
*) arg
, uargs
,
906 &channel
->ctx
, channel
->session
);
907 case LTTNG_UST_ENABLE
:
908 return lttng_channel_enable(channel
);
909 case LTTNG_UST_DISABLE
:
910 return lttng_channel_disable(channel
);
911 case LTTNG_UST_FLUSH_BUFFER
:
912 return channel
->ops
->flush_buffer(channel
->chan
, channel
->handle
);
919 int lttng_channel_release(int objd
)
921 struct lttng_channel
*channel
= objd_private(objd
);
924 return lttng_ust_objd_unref(channel
->session
->objd
, 0);
928 static const struct lttng_ust_objd_ops lttng_channel_ops
= {
929 .release
= lttng_channel_release
,
930 .cmd
= lttng_channel_cmd
,
934 * lttng_enabler_cmd - lttng control through object descriptors
936 * @objd: the object descriptor
939 * @uargs: UST arguments (internal)
942 * This object descriptor implements lttng commands:
944 * Prepend a context field to each record of events of this
947 * Enable recording for this enabler
949 * Disable recording for this enabler
951 * Attach a filter to an enabler.
952 * LTTNG_UST_EXCLUSION
953 * Attach exclusions to an enabler.
956 long lttng_event_enabler_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
957 union ust_args
*uargs
, void *owner
)
959 struct lttng_event_enabler
*enabler
= objd_private(objd
);
962 case LTTNG_UST_CONTEXT
:
963 return lttng_event_enabler_attach_context(enabler
,
964 (struct lttng_ust_context
*) arg
);
965 case LTTNG_UST_ENABLE
:
966 return lttng_event_enabler_enable(enabler
);
967 case LTTNG_UST_DISABLE
:
968 return lttng_event_enabler_disable(enabler
);
969 case LTTNG_UST_FILTER
:
973 ret
= lttng_event_enabler_attach_bytecode(enabler
,
974 (struct lttng_ust_filter_bytecode_node
*) arg
);
979 case LTTNG_UST_EXCLUSION
:
981 return lttng_event_enabler_attach_exclusion(enabler
,
982 (struct lttng_ust_excluder_node
*) arg
);
990 int lttng_event_enabler_release(int objd
)
992 struct lttng_event_enabler
*event_enabler
= objd_private(objd
);
995 return lttng_ust_objd_unref(event_enabler
->chan
->objd
, 0);
1000 static const struct lttng_ust_objd_ops lttng_event_enabler_ops
= {
1001 .release
= lttng_event_enabler_release
,
1002 .cmd
= lttng_event_enabler_cmd
,
1005 void lttng_ust_abi_exit(void)
1007 lttng_ust_abi_close_in_progress
= 1;
1009 objd_table_destroy();
1011 lttng_ust_abi_close_in_progress
= 0;