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.
41 #include <lttng/ust-abi.h>
42 #include <lttng/ust-error.h>
43 #include <urcu/compiler.h>
44 #include <urcu/list.h>
45 #include <lttng/ust-events.h>
46 #include <lttng/ust-version.h>
47 #include <lttng/tracepoint.h>
49 #include "tracepoint-internal.h"
50 #include <usterr-signal-safe.h>
52 #include "lttng-tracer.h"
53 #include "string-utils.h"
54 #include "../libringbuffer/shm.h"
55 #include "../libringbuffer/frontend_types.h"
57 #define OBJ_NAME_LEN 16
59 static int lttng_ust_abi_close_in_progress
;
62 int lttng_abi_tracepoint_list(void *owner
);
64 int lttng_abi_tracepoint_field_list(void *owner
);
67 * Object descriptor table. Should be protected from concurrent access
71 struct lttng_ust_obj
{
75 const struct lttng_ust_objd_ops
*ops
;
77 int owner_ref
; /* has ref from owner */
79 char name
[OBJ_NAME_LEN
];
81 int freelist_next
; /* offset freelist. end is -1. */
85 struct lttng_ust_objd_table
{
86 struct lttng_ust_obj
*array
;
87 unsigned int len
, allocated_len
;
88 int freelist_head
; /* offset freelist head. end is -1 */
91 static struct lttng_ust_objd_table objd_table
= {
96 int objd_alloc(void *private_data
, const struct lttng_ust_objd_ops
*ops
,
97 void *owner
, const char *name
)
99 struct lttng_ust_obj
*obj
;
101 if (objd_table
.freelist_head
!= -1) {
102 obj
= &objd_table
.array
[objd_table
.freelist_head
];
103 objd_table
.freelist_head
= obj
->u
.freelist_next
;
107 if (objd_table
.len
>= objd_table
.allocated_len
) {
108 unsigned int new_allocated_len
, old_allocated_len
;
109 struct lttng_ust_obj
*new_table
, *old_table
;
111 old_allocated_len
= objd_table
.allocated_len
;
112 old_table
= objd_table
.array
;
113 if (!old_allocated_len
)
114 new_allocated_len
= 1;
116 new_allocated_len
= old_allocated_len
<< 1;
117 new_table
= zmalloc(sizeof(struct lttng_ust_obj
) * new_allocated_len
);
120 memcpy(new_table
, old_table
,
121 sizeof(struct lttng_ust_obj
) * old_allocated_len
);
123 objd_table
.array
= new_table
;
124 objd_table
.allocated_len
= new_allocated_len
;
126 obj
= &objd_table
.array
[objd_table
.len
];
129 obj
->u
.s
.private_data
= private_data
;
131 obj
->u
.s
.f_count
= 2; /* count == 1 : object is allocated */
132 /* count == 2 : allocated + hold ref */
133 obj
->u
.s
.owner_ref
= 1; /* One owner reference */
134 obj
->u
.s
.owner
= owner
;
135 strncpy(obj
->u
.s
.name
, name
, OBJ_NAME_LEN
);
136 obj
->u
.s
.name
[OBJ_NAME_LEN
- 1] = '\0';
137 return obj
- objd_table
.array
;
141 struct lttng_ust_obj
*_objd_get(int id
)
143 if (id
>= objd_table
.len
)
145 if (!objd_table
.array
[id
].u
.s
.f_count
)
147 return &objd_table
.array
[id
];
151 void *objd_private(int id
)
153 struct lttng_ust_obj
*obj
= _objd_get(id
);
155 return obj
->u
.s
.private_data
;
159 void objd_set_private(int id
, void *private_data
)
161 struct lttng_ust_obj
*obj
= _objd_get(id
);
163 obj
->u
.s
.private_data
= private_data
;
166 const struct lttng_ust_objd_ops
*objd_ops(int id
)
168 struct lttng_ust_obj
*obj
= _objd_get(id
);
176 void objd_free(int id
)
178 struct lttng_ust_obj
*obj
= _objd_get(id
);
181 obj
->u
.freelist_next
= objd_table
.freelist_head
;
182 objd_table
.freelist_head
= obj
- objd_table
.array
;
183 assert(obj
->u
.s
.f_count
== 1);
184 obj
->u
.s
.f_count
= 0; /* deallocated */
188 void objd_ref(int id
)
190 struct lttng_ust_obj
*obj
= _objd_get(id
);
195 int lttng_ust_objd_unref(int id
, int is_owner
)
197 struct lttng_ust_obj
*obj
= _objd_get(id
);
201 if (obj
->u
.s
.f_count
== 1) {
202 ERR("Reference counting error\n");
206 if (!obj
->u
.s
.owner_ref
) {
207 ERR("Error decrementing owner reference");
210 obj
->u
.s
.owner_ref
--;
212 if ((--obj
->u
.s
.f_count
) == 1) {
213 const struct lttng_ust_objd_ops
*ops
= objd_ops(id
);
223 void objd_table_destroy(void)
227 for (i
= 0; i
< objd_table
.allocated_len
; i
++) {
228 struct lttng_ust_obj
*obj
;
233 if (!obj
->u
.s
.owner_ref
)
234 continue; /* only unref owner ref. */
235 (void) lttng_ust_objd_unref(i
, 1);
237 free(objd_table
.array
);
238 objd_table
.array
= NULL
;
240 objd_table
.allocated_len
= 0;
241 objd_table
.freelist_head
= -1;
244 const char *lttng_ust_obj_get_name(int id
)
246 struct lttng_ust_obj
*obj
= _objd_get(id
);
250 return obj
->u
.s
.name
;
253 void lttng_ust_objd_table_owner_cleanup(void *owner
)
257 for (i
= 0; i
< objd_table
.allocated_len
; i
++) {
258 struct lttng_ust_obj
*obj
;
264 continue; /* skip root handles */
265 if (!obj
->u
.s
.owner_ref
)
266 continue; /* only unref owner ref. */
267 if (obj
->u
.s
.owner
== owner
)
268 (void) lttng_ust_objd_unref(i
, 1);
273 * This is LTTng's own personal way to create an ABI for sessiond.
274 * We send commands over a socket.
277 static const struct lttng_ust_objd_ops lttng_ops
;
278 static const struct lttng_ust_objd_ops lttng_session_ops
;
279 static const struct lttng_ust_objd_ops lttng_channel_ops
;
280 static const struct lttng_ust_objd_ops lttng_enabler_ops
;
281 static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops
;
282 static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops
;
284 int lttng_abi_create_root_handle(void)
288 /* root handles have NULL owners */
289 root_handle
= objd_alloc(NULL
, <tng_ops
, NULL
, "root");
294 int lttng_is_channel_ready(struct lttng_channel
*lttng_chan
)
296 struct channel
*chan
;
297 unsigned int nr_streams
, exp_streams
;
299 chan
= lttng_chan
->chan
;
300 nr_streams
= channel_handle_get_nr_streams(lttng_chan
->handle
);
301 exp_streams
= chan
->nr_streams
;
302 return nr_streams
== exp_streams
;
306 int lttng_abi_create_session(void *owner
)
308 struct lttng_session
*session
;
309 int session_objd
, ret
;
311 session
= lttng_session_create();
314 session_objd
= objd_alloc(session
, <tng_session_ops
, owner
, "session");
315 if (session_objd
< 0) {
319 session
->objd
= session_objd
;
320 session
->owner
= owner
;
324 lttng_session_destroy(session
);
329 long lttng_abi_tracer_version(int objd
,
330 struct lttng_ust_tracer_version
*v
)
332 v
->major
= LTTNG_UST_MAJOR_VERSION
;
333 v
->minor
= LTTNG_UST_MINOR_VERSION
;
334 v
->patchlevel
= LTTNG_UST_PATCHLEVEL_VERSION
;
339 long lttng_abi_add_context(int objd
,
340 struct lttng_ust_context
*context_param
,
341 union ust_args
*uargs
,
342 struct lttng_ctx
**ctx
, struct lttng_session
*session
)
344 return lttng_attach_context(context_param
, uargs
, ctx
, session
);
348 * lttng_cmd - lttng control through socket commands
350 * @objd: the object descriptor
353 * @uargs: UST arguments (internal)
356 * This descriptor implements lttng commands:
358 * Returns a LTTng trace session object descriptor
359 * LTTNG_UST_TRACER_VERSION
360 * Returns the LTTng kernel tracer version
361 * LTTNG_UST_TRACEPOINT_LIST
362 * Returns a file descriptor listing available tracepoints
363 * LTTNG_UST_TRACEPOINT_FIELD_LIST
364 * Returns a file descriptor listing available tracepoint fields
365 * LTTNG_UST_WAIT_QUIESCENT
366 * Returns after all previously running probes have completed
368 * The returned session will be deleted when its file descriptor is closed.
371 long lttng_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
372 union ust_args
*uargs
, void *owner
)
375 case LTTNG_UST_SESSION
:
376 return lttng_abi_create_session(owner
);
377 case LTTNG_UST_TRACER_VERSION
:
378 return lttng_abi_tracer_version(objd
,
379 (struct lttng_ust_tracer_version
*) arg
);
380 case LTTNG_UST_TRACEPOINT_LIST
:
381 return lttng_abi_tracepoint_list(owner
);
382 case LTTNG_UST_TRACEPOINT_FIELD_LIST
:
383 return lttng_abi_tracepoint_field_list(owner
);
384 case LTTNG_UST_WAIT_QUIESCENT
:
392 static const struct lttng_ust_objd_ops lttng_ops
= {
397 int lttng_abi_map_channel(int session_objd
,
398 struct lttng_ust_channel
*ust_chan
,
399 union ust_args
*uargs
,
402 struct lttng_session
*session
= objd_private(session_objd
);
403 const char *transport_name
;
404 const struct lttng_transport
*transport
;
405 const char *chan_name
;
407 struct lttng_ust_shm_handle
*channel_handle
;
408 struct lttng_channel
*lttng_chan
;
409 struct channel
*chan
;
410 struct lttng_ust_lib_ring_buffer_config
*config
;
415 enum lttng_ust_chan_type type
;
417 chan_data
= uargs
->channel
.chan_data
;
418 wakeup_fd
= uargs
->channel
.wakeup_fd
;
420 type
= ust_chan
->type
;
423 case LTTNG_UST_CHAN_PER_CPU
:
430 if (session
->been_active
) {
432 goto active
; /* Refuse to add channel to active session */
435 channel_handle
= channel_handle_create(chan_data
, len
, wakeup_fd
);
436 if (!channel_handle
) {
441 /* Ownership of chan_data and wakeup_fd taken by channel handle. */
442 uargs
->channel
.chan_data
= NULL
;
443 uargs
->channel
.wakeup_fd
= -1;
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);
535 * lttng_session_cmd - lttng session object command
540 * @uargs: UST arguments (internal)
543 * This descriptor implements lttng commands:
545 * Returns a LTTng channel object descriptor
547 * Enables tracing for a session (weak enable)
549 * Disables tracing for a session (strong disable)
551 * The returned channel will be deleted when its file descriptor is closed.
554 long lttng_session_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
555 union ust_args
*uargs
, void *owner
)
557 struct lttng_session
*session
= objd_private(objd
);
560 case LTTNG_UST_CHANNEL
:
561 return lttng_abi_map_channel(objd
,
562 (struct lttng_ust_channel
*) arg
,
564 case LTTNG_UST_SESSION_START
:
565 case LTTNG_UST_ENABLE
:
566 return lttng_session_enable(session
);
567 case LTTNG_UST_SESSION_STOP
:
568 case LTTNG_UST_DISABLE
:
569 return lttng_session_disable(session
);
570 case LTTNG_UST_SESSION_STATEDUMP
:
571 return lttng_session_statedump(session
);
578 * Called when the last file reference is dropped.
580 * Big fat note: channels and events are invariant for the whole session after
581 * their creation. So this session destruction also destroys all channel and
582 * event structures specific to this session (they are not destroyed when their
583 * individual file is released).
586 int lttng_release_session(int objd
)
588 struct lttng_session
*session
= objd_private(objd
);
591 lttng_session_destroy(session
);
598 static const struct lttng_ust_objd_ops lttng_session_ops
= {
599 .release
= lttng_release_session
,
600 .cmd
= lttng_session_cmd
,
604 long lttng_tracepoint_list_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
605 union ust_args
*uargs
, void *owner
)
607 struct lttng_ust_tracepoint_list
*list
= objd_private(objd
);
608 struct lttng_ust_tracepoint_iter
*tp
=
609 (struct lttng_ust_tracepoint_iter
*) arg
;
610 struct lttng_ust_tracepoint_iter
*iter
;
613 case LTTNG_UST_TRACEPOINT_LIST_GET
:
615 iter
= lttng_ust_tracepoint_list_get_iter_next(list
);
617 return -LTTNG_UST_ERR_NOENT
;
618 memcpy(tp
, iter
, sizeof(*tp
));
627 int lttng_abi_tracepoint_list(void *owner
)
630 struct lttng_ust_tracepoint_list
*list
;
632 list_objd
= objd_alloc(NULL
, <tng_tracepoint_list_ops
, owner
, "tp_list");
637 list
= zmalloc(sizeof(*list
));
642 objd_set_private(list_objd
, list
);
644 /* populate list by walking on all registered probes. */
645 ret
= lttng_probes_get_event_list(list
);
657 err
= lttng_ust_objd_unref(list_objd
, 1);
665 int lttng_release_tracepoint_list(int objd
)
667 struct lttng_ust_tracepoint_list
*list
= objd_private(objd
);
670 lttng_probes_prune_event_list(list
);
678 static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops
= {
679 .release
= lttng_release_tracepoint_list
,
680 .cmd
= lttng_tracepoint_list_cmd
,
684 long lttng_tracepoint_field_list_cmd(int objd
, unsigned int cmd
,
685 unsigned long arg
, union ust_args
*uargs
, void *owner
)
687 struct lttng_ust_field_list
*list
= objd_private(objd
);
688 struct lttng_ust_field_iter
*tp
= &uargs
->field_list
.entry
;
689 struct lttng_ust_field_iter
*iter
;
692 case LTTNG_UST_TRACEPOINT_FIELD_LIST_GET
:
694 iter
= lttng_ust_field_list_get_iter_next(list
);
696 return -LTTNG_UST_ERR_NOENT
;
697 memcpy(tp
, iter
, sizeof(*tp
));
706 int lttng_abi_tracepoint_field_list(void *owner
)
709 struct lttng_ust_field_list
*list
;
711 list_objd
= objd_alloc(NULL
, <tng_tracepoint_field_list_ops
, owner
,
717 list
= zmalloc(sizeof(*list
));
722 objd_set_private(list_objd
, list
);
724 /* populate list by walking on all registered probes. */
725 ret
= lttng_probes_get_field_list(list
);
737 err
= lttng_ust_objd_unref(list_objd
, 1);
745 int lttng_release_tracepoint_field_list(int objd
)
747 struct lttng_ust_field_list
*list
= objd_private(objd
);
750 lttng_probes_prune_field_list(list
);
758 static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops
= {
759 .release
= lttng_release_tracepoint_field_list
,
760 .cmd
= lttng_tracepoint_field_list_cmd
,
764 int lttng_abi_map_stream(int channel_objd
, struct lttng_ust_stream
*info
,
765 union ust_args
*uargs
, void *owner
)
767 struct lttng_channel
*channel
= objd_private(channel_objd
);
770 ret
= channel_handle_add_stream(channel
->handle
,
771 uargs
->stream
.shm_fd
, uargs
->stream
.wakeup_fd
,
772 info
->stream_nr
, info
->len
);
774 goto error_add_stream
;
775 /* Take ownership of shm_fd and wakeup_fd. */
776 uargs
->stream
.shm_fd
= -1;
777 uargs
->stream
.wakeup_fd
= -1;
786 int lttng_abi_create_enabler(int channel_objd
,
787 struct lttng_ust_event
*event_param
,
789 enum lttng_enabler_type type
)
791 struct lttng_channel
*channel
= objd_private(channel_objd
);
792 struct lttng_enabler
*enabler
;
795 event_param
->name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
796 event_objd
= objd_alloc(NULL
, <tng_enabler_ops
, owner
, "enabler");
797 if (event_objd
< 0) {
802 * We tolerate no failure path after event creation. It will stay
803 * invariant for the rest of the session.
805 enabler
= lttng_enabler_create(type
, event_param
, channel
);
810 objd_set_private(event_objd
, enabler
);
811 /* The event holds a reference on the channel */
812 objd_ref(channel_objd
);
819 err
= lttng_ust_objd_unref(event_objd
, 1);
827 * lttng_channel_cmd - lttng control through object descriptors
829 * @objd: the object descriptor
832 * @uargs: UST arguments (internal)
835 * This object descriptor implements lttng commands:
837 * Returns an event stream object descriptor or failure.
838 * (typically, one event stream records events from one CPU)
840 * Returns an event object descriptor or failure.
842 * Prepend a context field to each event in the channel
844 * Enable recording for events in this channel (weak enable)
846 * Disable recording for events in this channel (strong disable)
848 * Channel and event file descriptors also hold a reference on the session.
851 long lttng_channel_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
852 union ust_args
*uargs
, void *owner
)
854 struct lttng_channel
*channel
= objd_private(objd
);
856 if (cmd
!= LTTNG_UST_STREAM
) {
858 * Check if channel received all streams.
860 if (!lttng_is_channel_ready(channel
))
865 case LTTNG_UST_STREAM
:
867 struct lttng_ust_stream
*stream
;
869 stream
= (struct lttng_ust_stream
*) arg
;
870 /* stream used as output */
871 return lttng_abi_map_stream(objd
, stream
, uargs
, owner
);
873 case LTTNG_UST_EVENT
:
875 struct lttng_ust_event
*event_param
=
876 (struct lttng_ust_event
*) arg
;
878 if (strutils_is_star_glob_pattern(event_param
->name
)) {
880 * If the event name is a star globbing pattern,
881 * we create the special star globbing enabler.
883 return lttng_abi_create_enabler(objd
, event_param
,
884 owner
, LTTNG_ENABLER_STAR_GLOB
);
886 return lttng_abi_create_enabler(objd
, event_param
,
887 owner
, LTTNG_ENABLER_EVENT
);
890 case LTTNG_UST_CONTEXT
:
891 return lttng_abi_add_context(objd
,
892 (struct lttng_ust_context
*) arg
, uargs
,
893 &channel
->ctx
, channel
->session
);
894 case LTTNG_UST_ENABLE
:
895 return lttng_channel_enable(channel
);
896 case LTTNG_UST_DISABLE
:
897 return lttng_channel_disable(channel
);
898 case LTTNG_UST_FLUSH_BUFFER
:
899 return channel
->ops
->flush_buffer(channel
->chan
, channel
->handle
);
906 int lttng_channel_release(int objd
)
908 struct lttng_channel
*channel
= objd_private(objd
);
911 return lttng_ust_objd_unref(channel
->session
->objd
, 0);
915 static const struct lttng_ust_objd_ops lttng_channel_ops
= {
916 .release
= lttng_channel_release
,
917 .cmd
= lttng_channel_cmd
,
921 * lttng_enabler_cmd - lttng control through object descriptors
923 * @objd: the object descriptor
926 * @uargs: UST arguments (internal)
929 * This object descriptor implements lttng commands:
931 * Prepend a context field to each record of events of this
934 * Enable recording for this enabler
936 * Disable recording for this enabler
938 * Attach a filter to an enabler.
939 * LTTNG_UST_EXCLUSION
940 * Attach exclusions to an enabler.
943 long lttng_enabler_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
944 union ust_args
*uargs
, void *owner
)
946 struct lttng_enabler
*enabler
= objd_private(objd
);
949 case LTTNG_UST_CONTEXT
:
950 return lttng_enabler_attach_context(enabler
,
951 (struct lttng_ust_context
*) arg
);
952 case LTTNG_UST_ENABLE
:
953 return lttng_enabler_enable(enabler
);
954 case LTTNG_UST_DISABLE
:
955 return lttng_enabler_disable(enabler
);
956 case LTTNG_UST_FILTER
:
960 ret
= lttng_enabler_attach_bytecode(enabler
,
961 (struct lttng_ust_filter_bytecode_node
*) arg
);
966 case LTTNG_UST_EXCLUSION
:
968 return lttng_enabler_attach_exclusion(enabler
,
969 (struct lttng_ust_excluder_node
*) arg
);
977 int lttng_enabler_release(int objd
)
979 struct lttng_enabler
*enabler
= objd_private(objd
);
982 return lttng_ust_objd_unref(enabler
->chan
->objd
, 0);
986 static const struct lttng_ust_objd_ops lttng_enabler_ops
= {
987 .release
= lttng_enabler_release
,
988 .cmd
= lttng_enabler_cmd
,
991 void lttng_ust_abi_exit(void)
993 lttng_ust_abi_close_in_progress
= 1;
995 objd_table_destroy();
997 lttng_ust_abi_close_in_progress
= 0;