Commit | Line | Data |
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f4681817 MD |
1 | /* |
2 | * lttng-ust-abi.c | |
3 | * | |
f4681817 MD |
4 | * LTTng UST ABI |
5 | * | |
e92f3e28 MD |
6 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
7 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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 | |
21 | * | |
22 | * | |
f4681817 MD |
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. | |
f4681817 MD |
38 | */ |
39 | ||
4318ae1b | 40 | #include <lttng/ust-abi.h> |
7bc53e94 | 41 | #include <lttng/ust-error.h> |
f4681817 MD |
42 | #include <urcu/compiler.h> |
43 | #include <urcu/list.h> | |
4318ae1b | 44 | #include <lttng/ust-events.h> |
23c8854a | 45 | #include <lttng/ust-version.h> |
902e1379 | 46 | #include <lttng/tracepoint.h> |
d8de1354 | 47 | #include "tracepoint-internal.h" |
44c72f10 MD |
48 | #include <usterr-signal-safe.h> |
49 | #include <helper.h> | |
7dd08bec | 50 | #include "lttng-tracer.h" |
4ab44fbe | 51 | |
7047f3da MD |
52 | #define OBJ_NAME_LEN 16 |
53 | ||
45e9e699 MD |
54 | static int lttng_ust_abi_close_in_progress; |
55 | ||
51489cad | 56 | static |
f59ed768 | 57 | int lttng_abi_tracepoint_list(void *owner); |
06d4f27e | 58 | static |
f59ed768 | 59 | int lttng_abi_tracepoint_field_list(void *owner); |
51489cad | 60 | |
f4681817 MD |
61 | /* |
62 | * Object descriptor table. Should be protected from concurrent access | |
63 | * by the caller. | |
64 | */ | |
65 | ||
b61ce3b2 | 66 | struct lttng_ust_obj { |
f4681817 MD |
67 | union { |
68 | struct { | |
69 | void *private_data; | |
b61ce3b2 | 70 | const struct lttng_ust_objd_ops *ops; |
f4681817 | 71 | int f_count; |
164931d2 | 72 | int owner_ref; /* has ref from owner */ |
f59ed768 | 73 | void *owner; |
7047f3da | 74 | char name[OBJ_NAME_LEN]; |
f4681817 MD |
75 | } s; |
76 | int freelist_next; /* offset freelist. end is -1. */ | |
77 | } u; | |
78 | }; | |
79 | ||
b61ce3b2 MD |
80 | struct lttng_ust_objd_table { |
81 | struct lttng_ust_obj *array; | |
f4681817 MD |
82 | unsigned int len, allocated_len; |
83 | int freelist_head; /* offset freelist head. end is -1 */ | |
84 | }; | |
85 | ||
b61ce3b2 | 86 | static struct lttng_ust_objd_table objd_table = { |
f4681817 MD |
87 | .freelist_head = -1, |
88 | }; | |
89 | ||
90 | static | |
f59ed768 | 91 | int objd_alloc(void *private_data, const struct lttng_ust_objd_ops *ops, |
7047f3da | 92 | void *owner, const char *name) |
f4681817 | 93 | { |
b61ce3b2 | 94 | struct lttng_ust_obj *obj; |
f4681817 MD |
95 | |
96 | if (objd_table.freelist_head != -1) { | |
97 | obj = &objd_table.array[objd_table.freelist_head]; | |
98 | objd_table.freelist_head = obj->u.freelist_next; | |
99 | goto end; | |
100 | } | |
101 | ||
102 | if (objd_table.len >= objd_table.allocated_len) { | |
103 | unsigned int new_allocated_len, old_allocated_len; | |
b61ce3b2 | 104 | struct lttng_ust_obj *new_table, *old_table; |
f4681817 MD |
105 | |
106 | old_allocated_len = objd_table.allocated_len; | |
107 | old_table = objd_table.array; | |
108 | if (!old_allocated_len) | |
109 | new_allocated_len = 1; | |
110 | else | |
111 | new_allocated_len = old_allocated_len << 1; | |
b61ce3b2 | 112 | new_table = zmalloc(sizeof(struct lttng_ust_obj) * new_allocated_len); |
f4681817 MD |
113 | if (!new_table) |
114 | return -ENOMEM; | |
115 | memcpy(new_table, old_table, | |
b61ce3b2 | 116 | sizeof(struct lttng_ust_obj) * old_allocated_len); |
f4681817 MD |
117 | free(old_table); |
118 | objd_table.array = new_table; | |
119 | objd_table.allocated_len = new_allocated_len; | |
120 | } | |
121 | obj = &objd_table.array[objd_table.len]; | |
122 | objd_table.len++; | |
123 | end: | |
124 | obj->u.s.private_data = private_data; | |
125 | obj->u.s.ops = ops; | |
a4be8962 MD |
126 | obj->u.s.f_count = 2; /* count == 1 : object is allocated */ |
127 | /* count == 2 : allocated + hold ref */ | |
164931d2 | 128 | obj->u.s.owner_ref = 1; /* One owner reference */ |
f59ed768 | 129 | obj->u.s.owner = owner; |
7047f3da MD |
130 | strncpy(obj->u.s.name, name, OBJ_NAME_LEN); |
131 | obj->u.s.name[OBJ_NAME_LEN - 1] = '\0'; | |
f4681817 MD |
132 | return obj - objd_table.array; |
133 | } | |
134 | ||
135 | static | |
b61ce3b2 | 136 | struct lttng_ust_obj *_objd_get(int id) |
f4681817 MD |
137 | { |
138 | if (id >= objd_table.len) | |
139 | return NULL; | |
a4be8962 MD |
140 | if (!objd_table.array[id].u.s.f_count) |
141 | return NULL; | |
f4681817 MD |
142 | return &objd_table.array[id]; |
143 | } | |
144 | ||
145 | static | |
146 | void *objd_private(int id) | |
147 | { | |
b61ce3b2 | 148 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
149 | assert(obj); |
150 | return obj->u.s.private_data; | |
151 | } | |
152 | ||
153 | static | |
154 | void objd_set_private(int id, void *private_data) | |
155 | { | |
b61ce3b2 | 156 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
157 | assert(obj); |
158 | obj->u.s.private_data = private_data; | |
159 | } | |
160 | ||
b61ce3b2 | 161 | const struct lttng_ust_objd_ops *objd_ops(int id) |
f4681817 | 162 | { |
b61ce3b2 | 163 | struct lttng_ust_obj *obj = _objd_get(id); |
46050b1a | 164 | |
a4be8962 MD |
165 | if (!obj) |
166 | return NULL; | |
f4681817 MD |
167 | return obj->u.s.ops; |
168 | } | |
169 | ||
170 | static | |
171 | void objd_free(int id) | |
172 | { | |
b61ce3b2 | 173 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
174 | |
175 | assert(obj); | |
176 | obj->u.freelist_next = objd_table.freelist_head; | |
177 | objd_table.freelist_head = obj - objd_table.array; | |
a4be8962 MD |
178 | assert(obj->u.s.f_count == 1); |
179 | obj->u.s.f_count = 0; /* deallocated */ | |
f4681817 MD |
180 | } |
181 | ||
182 | static | |
183 | void objd_ref(int id) | |
184 | { | |
b61ce3b2 | 185 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 MD |
186 | obj->u.s.f_count++; |
187 | } | |
188 | ||
164931d2 | 189 | int lttng_ust_objd_unref(int id, int is_owner) |
f4681817 | 190 | { |
b61ce3b2 | 191 | struct lttng_ust_obj *obj = _objd_get(id); |
f4681817 | 192 | |
1ea11eab MD |
193 | if (!obj) |
194 | return -EINVAL; | |
a4be8962 MD |
195 | if (obj->u.s.f_count == 1) { |
196 | ERR("Reference counting error\n"); | |
197 | return -EINVAL; | |
198 | } | |
164931d2 MD |
199 | if (is_owner) { |
200 | if (!obj->u.s.owner_ref) { | |
201 | ERR("Error decrementing owner reference"); | |
202 | return -EINVAL; | |
203 | } | |
204 | obj->u.s.owner_ref--; | |
205 | } | |
a4be8962 | 206 | if ((--obj->u.s.f_count) == 1) { |
b61ce3b2 | 207 | const struct lttng_ust_objd_ops *ops = objd_ops(id); |
a4be8962 | 208 | |
f4681817 MD |
209 | if (ops->release) |
210 | ops->release(id); | |
211 | objd_free(id); | |
212 | } | |
1ea11eab | 213 | return 0; |
f4681817 MD |
214 | } |
215 | ||
216 | static | |
217 | void objd_table_destroy(void) | |
218 | { | |
a4be8962 MD |
219 | int i; |
220 | ||
164931d2 MD |
221 | for (i = 0; i < objd_table.allocated_len; i++) { |
222 | struct lttng_ust_obj *obj; | |
223 | ||
224 | obj = _objd_get(i); | |
225 | if (!obj) | |
226 | continue; | |
227 | if (!obj->u.s.owner_ref) | |
228 | continue; /* only unref owner ref. */ | |
229 | (void) lttng_ust_objd_unref(i, 1); | |
230 | } | |
f4681817 | 231 | free(objd_table.array); |
02fb3381 MD |
232 | objd_table.array = NULL; |
233 | objd_table.len = 0; | |
234 | objd_table.allocated_len = 0; | |
17dfb34b | 235 | objd_table.freelist_head = -1; |
f4681817 MD |
236 | } |
237 | ||
f59ed768 MD |
238 | void lttng_ust_objd_table_owner_cleanup(void *owner) |
239 | { | |
240 | int i; | |
241 | ||
242 | for (i = 0; i < objd_table.allocated_len; i++) { | |
243 | struct lttng_ust_obj *obj; | |
244 | ||
245 | obj = _objd_get(i); | |
246 | if (!obj) | |
247 | continue; | |
248 | if (!obj->u.s.owner) | |
249 | continue; /* skip root handles */ | |
164931d2 MD |
250 | if (!obj->u.s.owner_ref) |
251 | continue; /* only unref owner ref. */ | |
f59ed768 | 252 | if (obj->u.s.owner == owner) |
164931d2 | 253 | (void) lttng_ust_objd_unref(i, 1); |
f59ed768 MD |
254 | } |
255 | } | |
256 | ||
f4681817 MD |
257 | /* |
258 | * This is LTTng's own personal way to create an ABI for sessiond. | |
259 | * We send commands over a socket. | |
260 | */ | |
261 | ||
b61ce3b2 MD |
262 | static const struct lttng_ust_objd_ops lttng_ops; |
263 | static const struct lttng_ust_objd_ops lttng_session_ops; | |
264 | static const struct lttng_ust_objd_ops lttng_channel_ops; | |
265 | static const struct lttng_ust_objd_ops lttng_metadata_ops; | |
e58095ef | 266 | static const struct lttng_ust_objd_ops lttng_enabler_ops; |
b61ce3b2 | 267 | static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops; |
51489cad | 268 | static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops; |
06d4f27e | 269 | static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops; |
f4681817 MD |
270 | |
271 | enum channel_type { | |
272 | PER_CPU_CHANNEL, | |
273 | METADATA_CHANNEL, | |
274 | }; | |
275 | ||
46050b1a MD |
276 | int lttng_abi_create_root_handle(void) |
277 | { | |
278 | int root_handle; | |
279 | ||
f59ed768 | 280 | /* root handles have NULL owners */ |
7047f3da | 281 | root_handle = objd_alloc(NULL, <tng_ops, NULL, "root"); |
46050b1a MD |
282 | return root_handle; |
283 | } | |
284 | ||
818173b9 | 285 | static |
f59ed768 | 286 | int lttng_abi_create_session(void *owner) |
f4681817 | 287 | { |
7dd08bec | 288 | struct lttng_session *session; |
f4681817 MD |
289 | int session_objd, ret; |
290 | ||
7dd08bec | 291 | session = lttng_session_create(); |
f4681817 MD |
292 | if (!session) |
293 | return -ENOMEM; | |
7047f3da | 294 | session_objd = objd_alloc(session, <tng_session_ops, owner, "session"); |
f4681817 MD |
295 | if (session_objd < 0) { |
296 | ret = session_objd; | |
297 | goto objd_error; | |
298 | } | |
299 | session->objd = session_objd; | |
300 | return session_objd; | |
301 | ||
302 | objd_error: | |
7dd08bec | 303 | lttng_session_destroy(session); |
f4681817 MD |
304 | return ret; |
305 | } | |
306 | ||
f4681817 MD |
307 | static |
308 | long lttng_abi_tracer_version(int objd, | |
309 | struct lttng_ust_tracer_version *v) | |
310 | { | |
0f4eaec3 MD |
311 | v->major = LTTNG_UST_INTERNAL_MAJOR_VERSION; |
312 | v->minor = LTTNG_UST_INTERNAL_MINOR_VERSION; | |
313 | v->patchlevel = LTTNG_UST_INTERNAL_PATCHLEVEL_VERSION; | |
f4681817 MD |
314 | return 0; |
315 | } | |
316 | ||
317 | static | |
318 | long lttng_abi_add_context(int objd, | |
319 | struct lttng_ust_context *context_param, | |
7dd08bec | 320 | struct lttng_ctx **ctx, struct lttng_session *session) |
f4681817 | 321 | { |
e58095ef | 322 | return lttng_attach_context(context_param, ctx, session); |
f4681817 MD |
323 | } |
324 | ||
325 | /** | |
326 | * lttng_cmd - lttng control through socket commands | |
327 | * | |
328 | * @objd: the object descriptor | |
329 | * @cmd: the command | |
330 | * @arg: command arg | |
ef9ff354 | 331 | * @uargs: UST arguments (internal) |
f59ed768 | 332 | * @owner: objd owner |
f4681817 MD |
333 | * |
334 | * This descriptor implements lttng commands: | |
335 | * LTTNG_UST_SESSION | |
336 | * Returns a LTTng trace session object descriptor | |
337 | * LTTNG_UST_TRACER_VERSION | |
338 | * Returns the LTTng kernel tracer version | |
339 | * LTTNG_UST_TRACEPOINT_LIST | |
340 | * Returns a file descriptor listing available tracepoints | |
06d4f27e MD |
341 | * LTTNG_UST_TRACEPOINT_FIELD_LIST |
342 | * Returns a file descriptor listing available tracepoint fields | |
f4681817 MD |
343 | * LTTNG_UST_WAIT_QUIESCENT |
344 | * Returns after all previously running probes have completed | |
345 | * | |
346 | * The returned session will be deleted when its file descriptor is closed. | |
347 | */ | |
348 | static | |
ef9ff354 | 349 | long lttng_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 350 | union ust_args *uargs, void *owner) |
f4681817 MD |
351 | { |
352 | switch (cmd) { | |
353 | case LTTNG_UST_SESSION: | |
f59ed768 | 354 | return lttng_abi_create_session(owner); |
f4681817 MD |
355 | case LTTNG_UST_TRACER_VERSION: |
356 | return lttng_abi_tracer_version(objd, | |
357 | (struct lttng_ust_tracer_version *) arg); | |
358 | case LTTNG_UST_TRACEPOINT_LIST: | |
f59ed768 | 359 | return lttng_abi_tracepoint_list(owner); |
06d4f27e | 360 | case LTTNG_UST_TRACEPOINT_FIELD_LIST: |
f59ed768 | 361 | return lttng_abi_tracepoint_field_list(owner); |
f4681817 MD |
362 | case LTTNG_UST_WAIT_QUIESCENT: |
363 | synchronize_trace(); | |
364 | return 0; | |
365 | default: | |
366 | return -EINVAL; | |
367 | } | |
368 | } | |
369 | ||
b61ce3b2 | 370 | static const struct lttng_ust_objd_ops lttng_ops = { |
f4681817 MD |
371 | .cmd = lttng_cmd, |
372 | }; | |
373 | ||
374 | /* | |
375 | * We tolerate no failure in this function (if one happens, we print a dmesg | |
376 | * error, but cannot return any error, because the channel information is | |
377 | * invariant. | |
378 | */ | |
379 | static | |
380 | void lttng_metadata_create_events(int channel_objd) | |
381 | { | |
e58095ef MD |
382 | struct lttng_channel *chan = objd_private(channel_objd); |
383 | struct lttng_enabler *enabler; | |
f4681817 MD |
384 | static struct lttng_ust_event metadata_params = { |
385 | .instrumentation = LTTNG_UST_TRACEPOINT, | |
a4ada9b8 | 386 | .name = "lttng_ust:metadata", |
457a6b58 MD |
387 | .loglevel_type = LTTNG_UST_LOGLEVEL_ALL, |
388 | .loglevel = TRACE_DEFAULT, | |
f4681817 | 389 | }; |
f4681817 MD |
390 | |
391 | /* | |
392 | * We tolerate no failure path after event creation. It will stay | |
393 | * invariant for the rest of the session. | |
394 | */ | |
e58095ef MD |
395 | enabler = lttng_enabler_create(LTTNG_ENABLER_EVENT, |
396 | &metadata_params, chan); | |
397 | if (!enabler) { | |
f4681817 MD |
398 | goto create_error; |
399 | } | |
400 | return; | |
401 | ||
402 | create_error: | |
403 | WARN_ON(1); | |
404 | return; /* not allowed to return error */ | |
405 | } | |
406 | ||
f4681817 MD |
407 | int lttng_abi_create_channel(int session_objd, |
408 | struct lttng_ust_channel *chan_param, | |
ef9ff354 | 409 | enum channel_type channel_type, |
f59ed768 MD |
410 | union ust_args *uargs, |
411 | void *owner) | |
f4681817 | 412 | { |
7dd08bec | 413 | struct lttng_session *session = objd_private(session_objd); |
b61ce3b2 | 414 | const struct lttng_ust_objd_ops *ops; |
f4681817 | 415 | const char *transport_name; |
7dd08bec | 416 | struct lttng_channel *chan; |
f4681817 MD |
417 | int chan_objd; |
418 | int ret = 0; | |
7dd08bec | 419 | struct lttng_channel chan_priv_init; |
f4681817 | 420 | |
f4681817 MD |
421 | switch (channel_type) { |
422 | case PER_CPU_CHANNEL: | |
423 | if (chan_param->output == LTTNG_UST_MMAP) { | |
424 | transport_name = chan_param->overwrite ? | |
425 | "relay-overwrite-mmap" : "relay-discard-mmap"; | |
426 | } else { | |
427 | return -EINVAL; | |
428 | } | |
429 | ops = <tng_channel_ops; | |
430 | break; | |
431 | case METADATA_CHANNEL: | |
432 | if (chan_param->output == LTTNG_UST_MMAP) | |
433 | transport_name = "relay-metadata-mmap"; | |
434 | else | |
435 | return -EINVAL; | |
436 | ops = <tng_metadata_ops; | |
437 | break; | |
438 | default: | |
439 | transport_name = "<unknown>"; | |
fe38d4af MD |
440 | return -EINVAL; |
441 | } | |
7047f3da | 442 | chan_objd = objd_alloc(NULL, ops, owner, "channel"); |
fe38d4af MD |
443 | if (chan_objd < 0) { |
444 | ret = chan_objd; | |
445 | goto objd_error; | |
f4681817 | 446 | } |
d028eddb MD |
447 | memset(&chan_priv_init, 0, sizeof(chan_priv_init)); |
448 | /* Copy of session UUID for consumer (availability through shm) */ | |
449 | memcpy(chan_priv_init.uuid, session->uuid, sizeof(session->uuid)); | |
450 | ||
f4681817 MD |
451 | /* |
452 | * We tolerate no failure path after channel creation. It will stay | |
453 | * invariant for the rest of the session. | |
454 | */ | |
7dd08bec | 455 | chan = lttng_channel_create(session, transport_name, NULL, |
f4681817 MD |
456 | chan_param->subbuf_size, |
457 | chan_param->num_subbuf, | |
458 | chan_param->switch_timer_interval, | |
193183fb | 459 | chan_param->read_timer_interval, |
ef9ff354 MD |
460 | &uargs->channel.shm_fd, |
461 | &uargs->channel.wait_fd, | |
462 | &uargs->channel.memory_map_size, | |
d028eddb | 463 | &chan_priv_init); |
f4681817 MD |
464 | if (!chan) { |
465 | ret = -EINVAL; | |
466 | goto chan_error; | |
467 | } | |
468 | objd_set_private(chan_objd, chan); | |
469 | chan->objd = chan_objd; | |
470 | if (channel_type == METADATA_CHANNEL) { | |
471 | session->metadata = chan; | |
472 | lttng_metadata_create_events(chan_objd); | |
473 | } | |
f4681817 MD |
474 | /* The channel created holds a reference on the session */ |
475 | objd_ref(session_objd); | |
476 | ||
477 | return chan_objd; | |
478 | ||
479 | chan_error: | |
1ea11eab MD |
480 | { |
481 | int err; | |
482 | ||
164931d2 | 483 | err = lttng_ust_objd_unref(chan_objd, 1); |
1ea11eab MD |
484 | assert(!err); |
485 | } | |
f4681817 MD |
486 | objd_error: |
487 | return ret; | |
488 | } | |
489 | ||
490 | /** | |
491 | * lttng_session_cmd - lttng session object command | |
492 | * | |
493 | * @obj: the object | |
494 | * @cmd: the command | |
495 | * @arg: command arg | |
ef9ff354 | 496 | * @uargs: UST arguments (internal) |
f59ed768 | 497 | * @owner: objd owner |
f4681817 MD |
498 | * |
499 | * This descriptor implements lttng commands: | |
500 | * LTTNG_UST_CHANNEL | |
501 | * Returns a LTTng channel object descriptor | |
502 | * LTTNG_UST_ENABLE | |
503 | * Enables tracing for a session (weak enable) | |
504 | * LTTNG_UST_DISABLE | |
505 | * Disables tracing for a session (strong disable) | |
506 | * LTTNG_UST_METADATA | |
507 | * Returns a LTTng metadata object descriptor | |
508 | * | |
509 | * The returned channel will be deleted when its file descriptor is closed. | |
510 | */ | |
511 | static | |
ef9ff354 | 512 | long lttng_session_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 513 | union ust_args *uargs, void *owner) |
f4681817 | 514 | { |
7dd08bec | 515 | struct lttng_session *session = objd_private(objd); |
f4681817 MD |
516 | |
517 | switch (cmd) { | |
518 | case LTTNG_UST_CHANNEL: | |
519 | return lttng_abi_create_channel(objd, | |
520 | (struct lttng_ust_channel *) arg, | |
f59ed768 | 521 | PER_CPU_CHANNEL, uargs, owner); |
f4681817 MD |
522 | case LTTNG_UST_SESSION_START: |
523 | case LTTNG_UST_ENABLE: | |
7dd08bec | 524 | return lttng_session_enable(session); |
f4681817 MD |
525 | case LTTNG_UST_SESSION_STOP: |
526 | case LTTNG_UST_DISABLE: | |
7dd08bec | 527 | return lttng_session_disable(session); |
f4681817 MD |
528 | case LTTNG_UST_METADATA: |
529 | return lttng_abi_create_channel(objd, | |
530 | (struct lttng_ust_channel *) arg, | |
f59ed768 | 531 | METADATA_CHANNEL, uargs, owner); |
f4681817 MD |
532 | default: |
533 | return -EINVAL; | |
534 | } | |
535 | } | |
536 | ||
537 | /* | |
538 | * Called when the last file reference is dropped. | |
539 | * | |
540 | * Big fat note: channels and events are invariant for the whole session after | |
541 | * their creation. So this session destruction also destroys all channel and | |
542 | * event structures specific to this session (they are not destroyed when their | |
543 | * individual file is released). | |
544 | */ | |
545 | static | |
1ea11eab | 546 | int lttng_release_session(int objd) |
f4681817 | 547 | { |
7dd08bec | 548 | struct lttng_session *session = objd_private(objd); |
f4681817 | 549 | |
1ea11eab | 550 | if (session) { |
7dd08bec | 551 | lttng_session_destroy(session); |
1ea11eab MD |
552 | return 0; |
553 | } else { | |
554 | return -EINVAL; | |
555 | } | |
f4681817 MD |
556 | } |
557 | ||
b61ce3b2 | 558 | static const struct lttng_ust_objd_ops lttng_session_ops = { |
1ea11eab | 559 | .release = lttng_release_session, |
f4681817 MD |
560 | .cmd = lttng_session_cmd, |
561 | }; | |
562 | ||
51489cad | 563 | static |
ef9ff354 | 564 | long lttng_tracepoint_list_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 565 | union ust_args *uargs, void *owner) |
51489cad | 566 | { |
c8fcf224 | 567 | struct lttng_ust_tracepoint_list *list = objd_private(objd); |
cbef6901 MD |
568 | struct lttng_ust_tracepoint_iter *tp = |
569 | (struct lttng_ust_tracepoint_iter *) arg; | |
c8fcf224 | 570 | struct lttng_ust_tracepoint_iter *iter; |
51489cad MD |
571 | |
572 | switch (cmd) { | |
573 | case LTTNG_UST_TRACEPOINT_LIST_GET: | |
c8fcf224 MD |
574 | { |
575 | retry: | |
576 | iter = lttng_ust_tracepoint_list_get_iter_next(list); | |
577 | if (!iter) | |
7bc53e94 | 578 | return -LTTNG_UST_ERR_NOENT; |
c8fcf224 MD |
579 | if (!strcmp(iter->name, "lttng_ust:metadata")) |
580 | goto retry; | |
581 | memcpy(tp, iter, sizeof(*tp)); | |
51489cad | 582 | return 0; |
c8fcf224 | 583 | } |
51489cad MD |
584 | default: |
585 | return -EINVAL; | |
586 | } | |
587 | } | |
588 | ||
589 | static | |
f59ed768 | 590 | int lttng_abi_tracepoint_list(void *owner) |
51489cad MD |
591 | { |
592 | int list_objd, ret; | |
c8fcf224 | 593 | struct lttng_ust_tracepoint_list *list; |
51489cad | 594 | |
7047f3da | 595 | list_objd = objd_alloc(NULL, <tng_tracepoint_list_ops, owner, "tp_list"); |
51489cad MD |
596 | if (list_objd < 0) { |
597 | ret = list_objd; | |
598 | goto objd_error; | |
599 | } | |
600 | list = zmalloc(sizeof(*list)); | |
601 | if (!list) { | |
602 | ret = -ENOMEM; | |
603 | goto alloc_error; | |
604 | } | |
605 | objd_set_private(list_objd, list); | |
606 | ||
c8fcf224 | 607 | /* populate list by walking on all registered probes. */ |
7dd08bec | 608 | ret = lttng_probes_get_event_list(list); |
c8fcf224 MD |
609 | if (ret) { |
610 | goto list_error; | |
611 | } | |
51489cad MD |
612 | return list_objd; |
613 | ||
c8fcf224 MD |
614 | list_error: |
615 | free(list); | |
51489cad MD |
616 | alloc_error: |
617 | { | |
618 | int err; | |
619 | ||
164931d2 | 620 | err = lttng_ust_objd_unref(list_objd, 1); |
51489cad MD |
621 | assert(!err); |
622 | } | |
623 | objd_error: | |
624 | return ret; | |
625 | } | |
626 | ||
627 | static | |
628 | int lttng_release_tracepoint_list(int objd) | |
629 | { | |
c8fcf224 | 630 | struct lttng_ust_tracepoint_list *list = objd_private(objd); |
51489cad MD |
631 | |
632 | if (list) { | |
7dd08bec | 633 | lttng_probes_prune_event_list(list); |
51489cad MD |
634 | free(list); |
635 | return 0; | |
636 | } else { | |
637 | return -EINVAL; | |
638 | } | |
639 | } | |
640 | ||
641 | static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops = { | |
642 | .release = lttng_release_tracepoint_list, | |
643 | .cmd = lttng_tracepoint_list_cmd, | |
644 | }; | |
645 | ||
06d4f27e MD |
646 | static |
647 | long lttng_tracepoint_field_list_cmd(int objd, unsigned int cmd, | |
f59ed768 | 648 | unsigned long arg, union ust_args *uargs, void *owner) |
06d4f27e MD |
649 | { |
650 | struct lttng_ust_field_list *list = objd_private(objd); | |
40003310 | 651 | struct lttng_ust_field_iter *tp = &uargs->field_list.entry; |
06d4f27e MD |
652 | struct lttng_ust_field_iter *iter; |
653 | ||
654 | switch (cmd) { | |
655 | case LTTNG_UST_TRACEPOINT_FIELD_LIST_GET: | |
656 | { | |
657 | retry: | |
658 | iter = lttng_ust_field_list_get_iter_next(list); | |
659 | if (!iter) | |
7bc53e94 | 660 | return -LTTNG_UST_ERR_NOENT; |
06d4f27e MD |
661 | if (!strcmp(iter->event_name, "lttng_ust:metadata")) |
662 | goto retry; | |
663 | memcpy(tp, iter, sizeof(*tp)); | |
664 | return 0; | |
665 | } | |
666 | default: | |
667 | return -EINVAL; | |
668 | } | |
669 | } | |
670 | ||
671 | static | |
f59ed768 | 672 | int lttng_abi_tracepoint_field_list(void *owner) |
06d4f27e MD |
673 | { |
674 | int list_objd, ret; | |
675 | struct lttng_ust_field_list *list; | |
676 | ||
7047f3da MD |
677 | list_objd = objd_alloc(NULL, <tng_tracepoint_field_list_ops, owner, |
678 | "tp_field_list"); | |
06d4f27e MD |
679 | if (list_objd < 0) { |
680 | ret = list_objd; | |
681 | goto objd_error; | |
682 | } | |
683 | list = zmalloc(sizeof(*list)); | |
684 | if (!list) { | |
685 | ret = -ENOMEM; | |
686 | goto alloc_error; | |
687 | } | |
688 | objd_set_private(list_objd, list); | |
689 | ||
690 | /* populate list by walking on all registered probes. */ | |
7dd08bec | 691 | ret = lttng_probes_get_field_list(list); |
06d4f27e MD |
692 | if (ret) { |
693 | goto list_error; | |
694 | } | |
695 | return list_objd; | |
696 | ||
697 | list_error: | |
698 | free(list); | |
699 | alloc_error: | |
700 | { | |
701 | int err; | |
702 | ||
164931d2 | 703 | err = lttng_ust_objd_unref(list_objd, 1); |
06d4f27e MD |
704 | assert(!err); |
705 | } | |
706 | objd_error: | |
707 | return ret; | |
708 | } | |
709 | ||
710 | static | |
711 | int lttng_release_tracepoint_field_list(int objd) | |
712 | { | |
713 | struct lttng_ust_field_list *list = objd_private(objd); | |
714 | ||
715 | if (list) { | |
7dd08bec | 716 | lttng_probes_prune_field_list(list); |
06d4f27e MD |
717 | free(list); |
718 | return 0; | |
719 | } else { | |
720 | return -EINVAL; | |
721 | } | |
722 | } | |
723 | ||
724 | static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops = { | |
725 | .release = lttng_release_tracepoint_field_list, | |
726 | .cmd = lttng_tracepoint_field_list_cmd, | |
727 | }; | |
728 | ||
381c0f1e | 729 | struct stream_priv_data { |
4cfec15c | 730 | struct lttng_ust_lib_ring_buffer *buf; |
7dd08bec | 731 | struct lttng_channel *lttng_chan; |
381c0f1e MD |
732 | }; |
733 | ||
f4681817 | 734 | static |
ef9ff354 | 735 | int lttng_abi_open_stream(int channel_objd, struct lttng_ust_stream *info, |
f59ed768 | 736 | union ust_args *uargs, void *owner) |
f4681817 | 737 | { |
7dd08bec | 738 | struct lttng_channel *channel = objd_private(channel_objd); |
4cfec15c | 739 | struct lttng_ust_lib_ring_buffer *buf; |
381c0f1e | 740 | struct stream_priv_data *priv; |
f4681817 MD |
741 | int stream_objd, ret; |
742 | ||
381c0f1e | 743 | buf = channel->ops->buffer_read_open(channel->chan, channel->handle, |
ef9ff354 MD |
744 | &uargs->stream.shm_fd, |
745 | &uargs->stream.wait_fd, | |
746 | &uargs->stream.memory_map_size); | |
f4681817 MD |
747 | if (!buf) |
748 | return -ENOENT; | |
749 | ||
381c0f1e MD |
750 | priv = zmalloc(sizeof(*priv)); |
751 | if (!priv) { | |
752 | ret = -ENOMEM; | |
753 | goto alloc_error; | |
754 | } | |
755 | priv->buf = buf; | |
7dd08bec | 756 | priv->lttng_chan = channel; |
7047f3da | 757 | stream_objd = objd_alloc(priv, &lib_ring_buffer_objd_ops, owner, "open_stream"); |
f4681817 MD |
758 | if (stream_objd < 0) { |
759 | ret = stream_objd; | |
760 | goto objd_error; | |
761 | } | |
381c0f1e MD |
762 | /* Hold a reference on the channel object descriptor */ |
763 | objd_ref(channel_objd); | |
f4681817 MD |
764 | return stream_objd; |
765 | ||
766 | objd_error: | |
381c0f1e MD |
767 | free(priv); |
768 | alloc_error: | |
769 | channel->ops->buffer_read_close(buf, channel->handle); | |
f4681817 MD |
770 | return ret; |
771 | } | |
f4681817 MD |
772 | |
773 | static | |
e58095ef | 774 | int lttng_abi_create_enabler(int channel_objd, |
f59ed768 | 775 | struct lttng_ust_event *event_param, |
e58095ef MD |
776 | void *owner, |
777 | enum lttng_enabler_type type) | |
f4681817 | 778 | { |
7dd08bec | 779 | struct lttng_channel *channel = objd_private(channel_objd); |
e58095ef | 780 | struct lttng_enabler *enabler; |
f4681817 MD |
781 | int event_objd, ret; |
782 | ||
783 | event_param->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
7047f3da | 784 | event_objd = objd_alloc(NULL, <tng_enabler_ops, owner, "enabler"); |
f4681817 MD |
785 | if (event_objd < 0) { |
786 | ret = event_objd; | |
787 | goto objd_error; | |
788 | } | |
789 | /* | |
790 | * We tolerate no failure path after event creation. It will stay | |
791 | * invariant for the rest of the session. | |
792 | */ | |
e58095ef MD |
793 | enabler = lttng_enabler_create(type, event_param, channel); |
794 | if (!enabler) { | |
795 | ret = -ENOMEM; | |
f4681817 MD |
796 | goto event_error; |
797 | } | |
e58095ef | 798 | objd_set_private(event_objd, enabler); |
f4681817 MD |
799 | /* The event holds a reference on the channel */ |
800 | objd_ref(channel_objd); | |
801 | return event_objd; | |
802 | ||
803 | event_error: | |
1ea11eab MD |
804 | { |
805 | int err; | |
806 | ||
164931d2 | 807 | err = lttng_ust_objd_unref(event_objd, 1); |
1ea11eab MD |
808 | assert(!err); |
809 | } | |
f4681817 MD |
810 | objd_error: |
811 | return ret; | |
812 | } | |
813 | ||
814 | /** | |
815 | * lttng_channel_cmd - lttng control through object descriptors | |
816 | * | |
817 | * @objd: the object descriptor | |
818 | * @cmd: the command | |
819 | * @arg: command arg | |
ef9ff354 | 820 | * @uargs: UST arguments (internal) |
f59ed768 | 821 | * @owner: objd owner |
f4681817 MD |
822 | * |
823 | * This object descriptor implements lttng commands: | |
824 | * LTTNG_UST_STREAM | |
825 | * Returns an event stream object descriptor or failure. | |
826 | * (typically, one event stream records events from one CPU) | |
827 | * LTTNG_UST_EVENT | |
828 | * Returns an event object descriptor or failure. | |
829 | * LTTNG_UST_CONTEXT | |
830 | * Prepend a context field to each event in the channel | |
831 | * LTTNG_UST_ENABLE | |
832 | * Enable recording for events in this channel (weak enable) | |
833 | * LTTNG_UST_DISABLE | |
834 | * Disable recording for events in this channel (strong disable) | |
835 | * | |
836 | * Channel and event file descriptors also hold a reference on the session. | |
837 | */ | |
838 | static | |
ef9ff354 | 839 | long lttng_channel_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 840 | union ust_args *uargs, void *owner) |
f4681817 | 841 | { |
7dd08bec | 842 | struct lttng_channel *channel = objd_private(objd); |
f4681817 MD |
843 | |
844 | switch (cmd) { | |
845 | case LTTNG_UST_STREAM: | |
381c0f1e MD |
846 | { |
847 | struct lttng_ust_stream *stream; | |
848 | ||
849 | stream = (struct lttng_ust_stream *) arg; | |
850 | /* stream used as output */ | |
f59ed768 | 851 | return lttng_abi_open_stream(objd, stream, uargs, owner); |
381c0f1e | 852 | } |
f4681817 | 853 | case LTTNG_UST_EVENT: |
1f18504e MD |
854 | { |
855 | struct lttng_ust_event *event_param = | |
856 | (struct lttng_ust_event *) arg; | |
6b0e60f1 MD |
857 | if (event_param->name[strlen(event_param->name) - 1] == '*') { |
858 | /* If ends with wildcard, create wildcard. */ | |
e58095ef MD |
859 | return lttng_abi_create_enabler(objd, event_param, |
860 | owner, LTTNG_ENABLER_WILDCARD); | |
1f18504e | 861 | } else { |
e58095ef MD |
862 | return lttng_abi_create_enabler(objd, event_param, |
863 | owner, LTTNG_ENABLER_EVENT); | |
1f18504e MD |
864 | } |
865 | } | |
f4681817 MD |
866 | case LTTNG_UST_CONTEXT: |
867 | return lttng_abi_add_context(objd, | |
868 | (struct lttng_ust_context *) arg, | |
869 | &channel->ctx, channel->session); | |
870 | case LTTNG_UST_ENABLE: | |
7dd08bec | 871 | return lttng_channel_enable(channel); |
f4681817 | 872 | case LTTNG_UST_DISABLE: |
7dd08bec | 873 | return lttng_channel_disable(channel); |
43d330a4 MD |
874 | case LTTNG_UST_FLUSH_BUFFER: |
875 | return channel->ops->flush_buffer(channel->chan, channel->handle); | |
f4681817 MD |
876 | default: |
877 | return -EINVAL; | |
878 | } | |
879 | } | |
880 | ||
881 | /** | |
882 | * lttng_metadata_cmd - lttng control through object descriptors | |
883 | * | |
884 | * @objd: the object descriptor | |
885 | * @cmd: the command | |
886 | * @arg: command arg | |
ef9ff354 | 887 | * @uargs: UST arguments (internal) |
f59ed768 | 888 | * @owner: objd owner |
f4681817 MD |
889 | * |
890 | * This object descriptor implements lttng commands: | |
891 | * LTTNG_UST_STREAM | |
892 | * Returns an event stream file descriptor or failure. | |
893 | * | |
894 | * Channel and event file descriptors also hold a reference on the session. | |
895 | */ | |
896 | static | |
ef9ff354 | 897 | long lttng_metadata_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 898 | union ust_args *uargs, void *owner) |
f4681817 | 899 | { |
7dd08bec | 900 | struct lttng_channel *channel = objd_private(objd); |
43861eab | 901 | |
f4681817 MD |
902 | switch (cmd) { |
903 | case LTTNG_UST_STREAM: | |
381c0f1e MD |
904 | { |
905 | struct lttng_ust_stream *stream; | |
906 | ||
907 | stream = (struct lttng_ust_stream *) arg; | |
908 | /* stream used as output */ | |
f59ed768 | 909 | return lttng_abi_open_stream(objd, stream, uargs, owner); |
381c0f1e | 910 | } |
43d330a4 MD |
911 | case LTTNG_UST_FLUSH_BUFFER: |
912 | return channel->ops->flush_buffer(channel->chan, channel->handle); | |
f4681817 MD |
913 | default: |
914 | return -EINVAL; | |
915 | } | |
916 | } | |
917 | ||
f4681817 MD |
918 | static |
919 | int lttng_channel_release(int objd) | |
920 | { | |
7dd08bec | 921 | struct lttng_channel *channel = objd_private(objd); |
f4681817 MD |
922 | |
923 | if (channel) | |
164931d2 | 924 | return lttng_ust_objd_unref(channel->session->objd, 0); |
f4681817 MD |
925 | return 0; |
926 | } | |
927 | ||
b61ce3b2 | 928 | static const struct lttng_ust_objd_ops lttng_channel_ops = { |
f4681817 | 929 | .release = lttng_channel_release, |
f4681817 MD |
930 | .cmd = lttng_channel_cmd, |
931 | }; | |
932 | ||
b61ce3b2 | 933 | static const struct lttng_ust_objd_ops lttng_metadata_ops = { |
f4681817 MD |
934 | .release = lttng_channel_release, |
935 | .cmd = lttng_metadata_cmd, | |
936 | }; | |
937 | ||
381c0f1e MD |
938 | /** |
939 | * lttng_rb_cmd - lttng ring buffer control through object descriptors | |
940 | * | |
941 | * @objd: the object descriptor | |
942 | * @cmd: the command | |
943 | * @arg: command arg | |
ef9ff354 | 944 | * @uargs: UST arguments (internal) |
f59ed768 | 945 | * @owner: objd owner |
381c0f1e MD |
946 | * |
947 | * This object descriptor implements lttng commands: | |
948 | * (None for now. Access is done directly though shm.) | |
381c0f1e MD |
949 | */ |
950 | static | |
ef9ff354 | 951 | long lttng_rb_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 952 | union ust_args *uargs, void *owner) |
381c0f1e | 953 | { |
381c0f1e MD |
954 | switch (cmd) { |
955 | default: | |
956 | return -EINVAL; | |
957 | } | |
958 | } | |
959 | ||
960 | static | |
961 | int lttng_rb_release(int objd) | |
962 | { | |
963 | struct stream_priv_data *priv = objd_private(objd); | |
4cfec15c | 964 | struct lttng_ust_lib_ring_buffer *buf; |
7dd08bec | 965 | struct lttng_channel *channel; |
381c0f1e MD |
966 | |
967 | if (priv) { | |
968 | buf = priv->buf; | |
7dd08bec | 969 | channel = priv->lttng_chan; |
381c0f1e | 970 | free(priv); |
45e9e699 MD |
971 | /* |
972 | * If we are at ABI exit, we don't want to close the | |
973 | * buffer opened for read: it is being shared between | |
974 | * the parent and child (right after fork), and we don't | |
975 | * want the child to close it for the parent. For a real | |
976 | * exit, we don't care about marking it as closed, as | |
977 | * the consumer daemon (if there is one) will do fine | |
978 | * even if we don't mark it as "closed" for reading on | |
979 | * our side. | |
980 | * We only mark it as closed if it is being explicitely | |
981 | * released by the session daemon with an explicit | |
982 | * release command. | |
983 | */ | |
984 | if (!lttng_ust_abi_close_in_progress) | |
985 | channel->ops->buffer_read_close(buf, channel->handle); | |
381c0f1e | 986 | |
164931d2 | 987 | return lttng_ust_objd_unref(channel->objd, 0); |
381c0f1e MD |
988 | } |
989 | return 0; | |
990 | } | |
991 | ||
b61ce3b2 | 992 | static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops = { |
381c0f1e MD |
993 | .release = lttng_rb_release, |
994 | .cmd = lttng_rb_cmd, | |
995 | }; | |
996 | ||
f4681817 | 997 | /** |
e58095ef | 998 | * lttng_enabler_cmd - lttng control through object descriptors |
e6c12e3d MD |
999 | * |
1000 | * @objd: the object descriptor | |
1001 | * @cmd: the command | |
1002 | * @arg: command arg | |
ef9ff354 | 1003 | * @uargs: UST arguments (internal) |
f59ed768 | 1004 | * @owner: objd owner |
e6c12e3d MD |
1005 | * |
1006 | * This object descriptor implements lttng commands: | |
1007 | * LTTNG_UST_CONTEXT | |
1008 | * Prepend a context field to each record of events of this | |
e58095ef | 1009 | * enabler. |
e6c12e3d | 1010 | * LTTNG_UST_ENABLE |
e58095ef | 1011 | * Enable recording for this enabler |
e6c12e3d | 1012 | * LTTNG_UST_DISABLE |
e58095ef | 1013 | * Disable recording for this enabler |
2d78951a | 1014 | * LTTNG_UST_FILTER |
e58095ef | 1015 | * Attach a filter to an enabler. |
e6c12e3d MD |
1016 | */ |
1017 | static | |
e58095ef | 1018 | long lttng_enabler_cmd(int objd, unsigned int cmd, unsigned long arg, |
f59ed768 | 1019 | union ust_args *uargs, void *owner) |
e6c12e3d | 1020 | { |
e58095ef | 1021 | struct lttng_enabler *enabler = objd_private(objd); |
e6c12e3d MD |
1022 | |
1023 | switch (cmd) { | |
1024 | case LTTNG_UST_CONTEXT: | |
e58095ef MD |
1025 | return lttng_enabler_attach_context(enabler, |
1026 | (struct lttng_ust_context *) arg); | |
e6c12e3d | 1027 | case LTTNG_UST_ENABLE: |
e58095ef | 1028 | return lttng_enabler_enable(enabler); |
e6c12e3d | 1029 | case LTTNG_UST_DISABLE: |
e58095ef | 1030 | return lttng_enabler_disable(enabler); |
2d78951a MD |
1031 | case LTTNG_UST_FILTER: |
1032 | { | |
1033 | int ret; | |
1034 | ||
e58095ef | 1035 | ret = lttng_enabler_attach_bytecode(enabler, |
f488575f | 1036 | (struct lttng_ust_filter_bytecode_node *) arg); |
2d78951a MD |
1037 | if (ret) |
1038 | return ret; | |
2d78951a MD |
1039 | return 0; |
1040 | } | |
e6c12e3d MD |
1041 | default: |
1042 | return -EINVAL; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | static | |
e58095ef | 1047 | int lttng_enabler_release(int objd) |
e6c12e3d | 1048 | { |
e58095ef | 1049 | struct lttng_enabler *enabler = objd_private(objd); |
e6c12e3d | 1050 | |
e58095ef | 1051 | if (enabler) |
164931d2 | 1052 | return lttng_ust_objd_unref(enabler->chan->objd, 0); |
e6c12e3d MD |
1053 | return 0; |
1054 | } | |
1055 | ||
e58095ef MD |
1056 | static const struct lttng_ust_objd_ops lttng_enabler_ops = { |
1057 | .release = lttng_enabler_release, | |
1058 | .cmd = lttng_enabler_cmd, | |
e6c12e3d MD |
1059 | }; |
1060 | ||
b35d179d | 1061 | void lttng_ust_abi_exit(void) |
f4681817 | 1062 | { |
45e9e699 | 1063 | lttng_ust_abi_close_in_progress = 1; |
f4681817 | 1064 | objd_table_destroy(); |
45e9e699 | 1065 | lttng_ust_abi_close_in_progress = 0; |
f4681817 | 1066 | } |