Commit | Line | Data |
---|---|---|
20fe2104 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
82a3637f DG |
6 | * as published by the Free Software Foundation; only version 2 |
7 | * of the License. | |
20fe2104 DG |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | */ | |
18 | ||
8c0faa1d | 19 | #define _GNU_SOURCE |
20fe2104 | 20 | #include <errno.h> |
7b395890 | 21 | #include <fcntl.h> |
20fe2104 DG |
22 | #include <stdlib.h> |
23 | #include <stdio.h> | |
f34daff7 | 24 | #include <string.h> |
8c0faa1d | 25 | #include <unistd.h> |
20fe2104 | 26 | |
1e307fab DG |
27 | #include <lttng-kernel-ctl.h> |
28 | #include <lttngerr.h> | |
29 | ||
4771f025 | 30 | #include "kernel.h" |
20fe2104 | 31 | |
d65106b1 | 32 | /* |
050349bb | 33 | * Add context on a kernel channel. |
d65106b1 DG |
34 | */ |
35 | int kernel_add_channel_context(struct ltt_kernel_channel *chan, | |
36 | struct lttng_kernel_context *ctx) | |
37 | { | |
38 | int ret; | |
39 | ||
40 | DBG("Adding context to channel %s", chan->channel->name); | |
41 | ret = kernctl_add_context(chan->fd, ctx); | |
42 | if (ret < 0) { | |
b579acd9 DG |
43 | if (errno != EEXIST) { |
44 | perror("add context ioctl"); | |
45 | } else { | |
46 | /* If EEXIST, we just ignore the error */ | |
47 | ret = 0; | |
48 | } | |
d65106b1 DG |
49 | goto error; |
50 | } | |
51 | ||
ba7f0ae5 | 52 | chan->ctx = zmalloc(sizeof(struct lttng_kernel_context)); |
d65106b1 | 53 | if (chan->ctx == NULL) { |
ba7f0ae5 | 54 | perror("zmalloc event context"); |
d65106b1 DG |
55 | goto error; |
56 | } | |
57 | ||
58 | memcpy(chan->ctx, ctx, sizeof(struct lttng_kernel_context)); | |
59 | ||
60 | return 0; | |
61 | ||
62 | error: | |
63 | return ret; | |
64 | } | |
65 | ||
66 | /* | |
050349bb | 67 | * Add context on a kernel event. |
d65106b1 DG |
68 | */ |
69 | int kernel_add_event_context(struct ltt_kernel_event *event, | |
70 | struct lttng_kernel_context *ctx) | |
71 | { | |
72 | int ret; | |
73 | ||
74 | DBG("Adding context to event %s", event->event->name); | |
75 | ret = kernctl_add_context(event->fd, ctx); | |
76 | if (ret < 0) { | |
77 | perror("add context ioctl"); | |
78 | goto error; | |
79 | } | |
80 | ||
ba7f0ae5 | 81 | event->ctx = zmalloc(sizeof(struct lttng_kernel_context)); |
d65106b1 | 82 | if (event->ctx == NULL) { |
ba7f0ae5 | 83 | perror("zmalloc event context"); |
d65106b1 DG |
84 | goto error; |
85 | } | |
86 | ||
87 | memcpy(event->ctx, ctx, sizeof(struct lttng_kernel_context)); | |
88 | ||
89 | return 0; | |
90 | ||
91 | error: | |
92 | return ret; | |
93 | } | |
94 | ||
20fe2104 | 95 | /* |
050349bb DG |
96 | * Create a new kernel session, register it to the kernel tracer and add it to |
97 | * the session daemon session. | |
20fe2104 | 98 | */ |
8c0faa1d | 99 | int kernel_create_session(struct ltt_session *session, int tracer_fd) |
20fe2104 DG |
100 | { |
101 | int ret; | |
102 | struct ltt_kernel_session *lks; | |
103 | ||
54012638 | 104 | /* Allocate data structure */ |
f9815039 | 105 | lks = trace_kernel_create_session(session->path); |
20fe2104 | 106 | if (lks == NULL) { |
54012638 | 107 | ret = -1; |
20fe2104 DG |
108 | goto error; |
109 | } | |
110 | ||
54012638 | 111 | /* Kernel tracer session creation */ |
20fe2104 DG |
112 | ret = kernctl_create_session(tracer_fd); |
113 | if (ret < 0) { | |
54012638 | 114 | perror("ioctl kernel create session"); |
20fe2104 DG |
115 | goto error; |
116 | } | |
117 | ||
20fe2104 | 118 | lks->fd = ret; |
7b395890 DG |
119 | /* Prevent fd duplication after execlp() */ |
120 | ret = fcntl(lks->fd, F_SETFD, FD_CLOEXEC); | |
121 | if (ret < 0) { | |
122 | perror("fcntl session fd"); | |
123 | } | |
124 | ||
3bd1e081 | 125 | lks->consumer_fds_sent = 0; |
8c0faa1d | 126 | session->kernel_session = lks; |
8c0faa1d DG |
127 | |
128 | DBG("Kernel session created (fd: %d)", lks->fd); | |
20fe2104 DG |
129 | |
130 | return 0; | |
131 | ||
132 | error: | |
133 | return ret; | |
134 | } | |
135 | ||
136 | /* | |
050349bb DG |
137 | * Create a kernel channel, register it to the kernel tracer and add it to the |
138 | * kernel session. | |
20fe2104 | 139 | */ |
050349bb DG |
140 | int kernel_create_channel(struct ltt_kernel_session *session, |
141 | struct lttng_channel *chan, char *path) | |
20fe2104 DG |
142 | { |
143 | int ret; | |
144 | struct ltt_kernel_channel *lkc; | |
20fe2104 | 145 | |
54012638 | 146 | /* Allocate kernel channel */ |
62499ad6 | 147 | lkc = trace_kernel_create_channel(chan, path); |
54012638 | 148 | if (lkc == NULL) { |
20fe2104 DG |
149 | goto error; |
150 | } | |
151 | ||
54012638 | 152 | /* Kernel tracer channel creation */ |
f3ed775e | 153 | ret = kernctl_create_channel(session->fd, &lkc->channel->attr); |
20fe2104 | 154 | if (ret < 0) { |
54012638 | 155 | perror("ioctl kernel create channel"); |
20fe2104 DG |
156 | goto error; |
157 | } | |
158 | ||
54012638 | 159 | /* Setup the channel fd */ |
20fe2104 | 160 | lkc->fd = ret; |
7b395890 DG |
161 | /* Prevent fd duplication after execlp() */ |
162 | ret = fcntl(lkc->fd, F_SETFD, FD_CLOEXEC); | |
163 | if (ret < 0) { | |
164 | perror("fcntl session fd"); | |
165 | } | |
166 | ||
54012638 | 167 | /* Add channel to session */ |
8c0faa1d DG |
168 | cds_list_add(&lkc->list, &session->channel_list.head); |
169 | session->channel_count++; | |
20fe2104 | 170 | |
f3ed775e DG |
171 | DBG("Kernel channel %s created (fd: %d and path: %s)", |
172 | lkc->channel->name, lkc->fd, lkc->pathname); | |
20fe2104 DG |
173 | |
174 | return 0; | |
175 | ||
176 | error: | |
54012638 | 177 | return -1; |
20fe2104 | 178 | } |
f34daff7 DG |
179 | |
180 | /* | |
050349bb DG |
181 | * Create a kernel event, enable it to the kernel tracer and add it to the |
182 | * channel event list of the kernel session. | |
f34daff7 | 183 | */ |
050349bb DG |
184 | int kernel_create_event(struct lttng_event *ev, |
185 | struct ltt_kernel_channel *channel) | |
f34daff7 DG |
186 | { |
187 | int ret; | |
188 | struct ltt_kernel_event *event; | |
f34daff7 | 189 | |
62499ad6 | 190 | event = trace_kernel_create_event(ev); |
54012638 | 191 | if (event == NULL) { |
d87bfb32 | 192 | ret = -1; |
f34daff7 DG |
193 | goto error; |
194 | } | |
195 | ||
f3ed775e DG |
196 | ret = kernctl_create_event(channel->fd, event->event); |
197 | if (ret < 0) { | |
d87bfb32 DG |
198 | if (errno != EEXIST) { |
199 | PERROR("create event ioctl"); | |
200 | } | |
201 | ret = -errno; | |
e953ef25 | 202 | goto free_event; |
8c0faa1d | 203 | } |
f34daff7 | 204 | |
5f822d0a DG |
205 | /* |
206 | * LTTNG_KERNEL_SYSCALL event creation will return 0 on success. However | |
207 | * this FD must not be added to the event list. | |
208 | */ | |
209 | if (ret == 0 && event->event->instrumentation == LTTNG_KERNEL_SYSCALL) { | |
210 | DBG2("Kernel event syscall creation success"); | |
211 | goto end; | |
212 | } | |
213 | ||
f3ed775e | 214 | event->fd = ret; |
7b395890 DG |
215 | /* Prevent fd duplication after execlp() */ |
216 | ret = fcntl(event->fd, F_SETFD, FD_CLOEXEC); | |
217 | if (ret < 0) { | |
218 | perror("fcntl session fd"); | |
219 | } | |
220 | ||
f3ed775e DG |
221 | /* Add event to event list */ |
222 | cds_list_add(&event->list, &channel->events_list.head); | |
cbbbb275 DG |
223 | channel->event_count++; |
224 | ||
e953ef25 DG |
225 | DBG("Event %s created (fd: %d)", ev->name, event->fd); |
226 | ||
5f822d0a | 227 | end: |
e953ef25 DG |
228 | return 0; |
229 | ||
230 | free_event: | |
231 | free(event); | |
232 | error: | |
d87bfb32 | 233 | return ret; |
e953ef25 DG |
234 | } |
235 | ||
26cc6b4e | 236 | /* |
050349bb | 237 | * Disable a kernel channel. |
26cc6b4e DG |
238 | */ |
239 | int kernel_disable_channel(struct ltt_kernel_channel *chan) | |
240 | { | |
241 | int ret; | |
242 | ||
243 | ret = kernctl_disable(chan->fd); | |
244 | if (ret < 0) { | |
245 | perror("disable chan ioctl"); | |
246 | ret = errno; | |
247 | goto error; | |
248 | } | |
249 | ||
250 | chan->enabled = 0; | |
251 | DBG("Kernel channel %s disabled (fd: %d)", chan->channel->name, chan->fd); | |
252 | ||
253 | return 0; | |
254 | ||
255 | error: | |
256 | return ret; | |
257 | } | |
258 | ||
d36b8583 | 259 | /* |
050349bb | 260 | * Enable a kernel channel. |
d36b8583 DG |
261 | */ |
262 | int kernel_enable_channel(struct ltt_kernel_channel *chan) | |
263 | { | |
264 | int ret; | |
265 | ||
266 | ret = kernctl_enable(chan->fd); | |
54d01ffb DG |
267 | if (ret < 0 && errno != EEXIST) { |
268 | perror("Enable kernel chan"); | |
d36b8583 DG |
269 | goto error; |
270 | } | |
271 | ||
272 | chan->enabled = 1; | |
273 | DBG("Kernel channel %s enabled (fd: %d)", chan->channel->name, chan->fd); | |
274 | ||
275 | return 0; | |
276 | ||
277 | error: | |
278 | return ret; | |
279 | } | |
280 | ||
19e70852 | 281 | /* |
050349bb | 282 | * Enable a kernel event. |
19e70852 DG |
283 | */ |
284 | int kernel_enable_event(struct ltt_kernel_event *event) | |
285 | { | |
286 | int ret; | |
287 | ||
288 | ret = kernctl_enable(event->fd); | |
54d01ffb DG |
289 | if (ret < 0 && errno != EEXIST) { |
290 | perror("enable kernel event"); | |
19e70852 DG |
291 | goto error; |
292 | } | |
293 | ||
294 | event->enabled = 1; | |
295 | DBG("Kernel event %s enabled (fd: %d)", event->event->name, event->fd); | |
296 | ||
297 | return 0; | |
298 | ||
299 | error: | |
d36b8583 | 300 | return ret; |
19e70852 DG |
301 | } |
302 | ||
e953ef25 | 303 | /* |
050349bb | 304 | * Disable a kernel event. |
e953ef25 | 305 | */ |
19e70852 | 306 | int kernel_disable_event(struct ltt_kernel_event *event) |
e953ef25 DG |
307 | { |
308 | int ret; | |
19e70852 DG |
309 | |
310 | ret = kernctl_disable(event->fd); | |
54d01ffb DG |
311 | if (ret < 0 && errno != EEXIST) { |
312 | perror("disable kernel event"); | |
19e70852 | 313 | goto error; |
e953ef25 | 314 | } |
f3ed775e | 315 | |
19e70852 DG |
316 | event->enabled = 0; |
317 | DBG("Kernel event %s disabled (fd: %d)", event->event->name, event->fd); | |
318 | ||
f34daff7 DG |
319 | return 0; |
320 | ||
321 | error: | |
d36b8583 | 322 | return ret; |
f34daff7 | 323 | } |
aaf26714 DG |
324 | |
325 | /* | |
050349bb DG |
326 | * Create kernel metadata, open from the kernel tracer and add it to the |
327 | * kernel session. | |
aaf26714 | 328 | */ |
58a97671 | 329 | int kernel_open_metadata(struct ltt_kernel_session *session, char *path) |
aaf26714 DG |
330 | { |
331 | int ret; | |
332 | struct ltt_kernel_metadata *lkm; | |
aaf26714 | 333 | |
54012638 | 334 | /* Allocate kernel metadata */ |
62499ad6 | 335 | lkm = trace_kernel_create_metadata(path); |
54012638 | 336 | if (lkm == NULL) { |
aaf26714 DG |
337 | goto error; |
338 | } | |
339 | ||
54012638 | 340 | /* Kernel tracer metadata creation */ |
f3ed775e | 341 | ret = kernctl_open_metadata(session->fd, &lkm->conf->attr); |
aaf26714 DG |
342 | if (ret < 0) { |
343 | goto error; | |
344 | } | |
345 | ||
8c0faa1d | 346 | lkm->fd = ret; |
7b395890 DG |
347 | /* Prevent fd duplication after execlp() */ |
348 | ret = fcntl(lkm->fd, F_SETFD, FD_CLOEXEC); | |
349 | if (ret < 0) { | |
350 | perror("fcntl session fd"); | |
351 | } | |
352 | ||
aaf26714 | 353 | session->metadata = lkm; |
8c0faa1d | 354 | |
54012638 | 355 | DBG("Kernel metadata opened (fd: %d and path: %s)", lkm->fd, lkm->pathname); |
8c0faa1d DG |
356 | |
357 | return 0; | |
358 | ||
359 | error: | |
54012638 | 360 | return -1; |
8c0faa1d DG |
361 | } |
362 | ||
363 | /* | |
050349bb | 364 | * Start tracing session. |
8c0faa1d DG |
365 | */ |
366 | int kernel_start_session(struct ltt_kernel_session *session) | |
367 | { | |
368 | int ret; | |
369 | ||
370 | ret = kernctl_start_session(session->fd); | |
371 | if (ret < 0) { | |
f3ed775e | 372 | perror("ioctl start session"); |
8c0faa1d DG |
373 | goto error; |
374 | } | |
375 | ||
376 | DBG("Kernel session started"); | |
377 | ||
378 | return 0; | |
379 | ||
380 | error: | |
381 | return ret; | |
382 | } | |
383 | ||
f3ed775e | 384 | /* |
050349bb | 385 | * Make a kernel wait to make sure in-flight probe have completed. |
f3ed775e DG |
386 | */ |
387 | void kernel_wait_quiescent(int fd) | |
388 | { | |
389 | int ret; | |
390 | ||
391 | DBG("Kernel quiescent wait on %d", fd); | |
392 | ||
393 | ret = kernctl_wait_quiescent(fd); | |
394 | if (ret < 0) { | |
395 | perror("wait quiescent ioctl"); | |
396 | ERR("Kernel quiescent wait failed"); | |
397 | } | |
398 | } | |
399 | ||
d0254c7c | 400 | /* |
050349bb | 401 | * Kernel calibrate |
d0254c7c MD |
402 | */ |
403 | int kernel_calibrate(int fd, struct lttng_kernel_calibrate *calibrate) | |
404 | { | |
405 | int ret; | |
406 | ||
407 | ret = kernctl_calibrate(fd, calibrate); | |
408 | if (ret < 0) { | |
409 | perror("calibrate ioctl"); | |
410 | return -1; | |
411 | } | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
416 | ||
f3ed775e | 417 | /* |
f3ed775e DG |
418 | * Force flush buffer of metadata. |
419 | */ | |
420 | int kernel_metadata_flush_buffer(int fd) | |
421 | { | |
422 | int ret; | |
423 | ||
424 | ret = kernctl_buffer_flush(fd); | |
425 | if (ret < 0) { | |
426 | ERR("Fail to flush metadata buffers %d (ret: %d", fd, ret); | |
427 | } | |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
432 | /* | |
050349bb | 433 | * Force flush buffer for channel. |
f3ed775e DG |
434 | */ |
435 | int kernel_flush_buffer(struct ltt_kernel_channel *channel) | |
436 | { | |
437 | int ret; | |
438 | struct ltt_kernel_stream *stream; | |
439 | ||
440 | DBG("Flush buffer for channel %s", channel->channel->name); | |
441 | ||
442 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
443 | DBG("Flushing channel stream %d", stream->fd); | |
444 | ret = kernctl_buffer_flush(stream->fd); | |
445 | if (ret < 0) { | |
446 | perror("ioctl"); | |
447 | ERR("Fail to flush buffer for stream %d (ret: %d)", | |
448 | stream->fd, ret); | |
449 | } | |
450 | } | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
8c0faa1d | 455 | /* |
050349bb | 456 | * Stop tracing session. |
8c0faa1d DG |
457 | */ |
458 | int kernel_stop_session(struct ltt_kernel_session *session) | |
459 | { | |
460 | int ret; | |
461 | ||
462 | ret = kernctl_stop_session(session->fd); | |
463 | if (ret < 0) { | |
464 | goto error; | |
465 | } | |
466 | ||
467 | DBG("Kernel session stopped"); | |
468 | ||
469 | return 0; | |
470 | ||
471 | error: | |
472 | return ret; | |
473 | } | |
474 | ||
475 | /* | |
050349bb DG |
476 | * Open stream of channel, register it to the kernel tracer and add it |
477 | * to the stream list of the channel. | |
8c0faa1d | 478 | * |
050349bb | 479 | * Return the number of created stream. Else, a negative value. |
8c0faa1d | 480 | */ |
f3ed775e | 481 | int kernel_open_channel_stream(struct ltt_kernel_channel *channel) |
8c0faa1d DG |
482 | { |
483 | int ret; | |
484 | struct ltt_kernel_stream *lks; | |
485 | ||
486 | while ((ret = kernctl_create_stream(channel->fd)) > 0) { | |
62499ad6 | 487 | lks = trace_kernel_create_stream(); |
8c0faa1d | 488 | if (lks == NULL) { |
54012638 | 489 | close(ret); |
8c0faa1d DG |
490 | goto error; |
491 | } | |
492 | ||
493 | lks->fd = ret; | |
7b395890 DG |
494 | /* Prevent fd duplication after execlp() */ |
495 | ret = fcntl(lks->fd, F_SETFD, FD_CLOEXEC); | |
496 | if (ret < 0) { | |
497 | perror("fcntl session fd"); | |
498 | } | |
499 | ||
8e68d1c8 DG |
500 | ret = asprintf(&lks->pathname, "%s/%s_%d", |
501 | channel->pathname, channel->channel->name, channel->stream_count); | |
8c0faa1d DG |
502 | if (ret < 0) { |
503 | perror("asprintf kernel create stream"); | |
504 | goto error; | |
505 | } | |
8c0faa1d | 506 | |
54012638 | 507 | /* Add stream to channe stream list */ |
8c0faa1d DG |
508 | cds_list_add(&lks->list, &channel->stream_list.head); |
509 | channel->stream_count++; | |
8c0faa1d | 510 | |
54012638 DG |
511 | DBG("Kernel stream %d created (fd: %d, state: %d, path: %s)", |
512 | channel->stream_count, lks->fd, lks->state, lks->pathname); | |
513 | } | |
8c0faa1d DG |
514 | |
515 | return channel->stream_count; | |
516 | ||
517 | error: | |
54012638 | 518 | return -1; |
8c0faa1d DG |
519 | } |
520 | ||
521 | /* | |
050349bb | 522 | * Open the metadata stream and set it to the kernel session. |
8c0faa1d | 523 | */ |
f3ed775e | 524 | int kernel_open_metadata_stream(struct ltt_kernel_session *session) |
8c0faa1d DG |
525 | { |
526 | int ret; | |
527 | ||
528 | ret = kernctl_create_stream(session->metadata->fd); | |
529 | if (ret < 0) { | |
530 | perror("kernel create metadata stream"); | |
8c0faa1d DG |
531 | goto error; |
532 | } | |
533 | ||
534 | DBG("Kernel metadata stream created (fd: %d)", ret); | |
535 | session->metadata_stream_fd = ret; | |
7b395890 DG |
536 | /* Prevent fd duplication after execlp() */ |
537 | ret = fcntl(session->metadata_stream_fd, F_SETFD, FD_CLOEXEC); | |
538 | if (ret < 0) { | |
539 | perror("fcntl session fd"); | |
540 | } | |
aaf26714 DG |
541 | |
542 | return 0; | |
543 | ||
544 | error: | |
54012638 | 545 | return -1; |
aaf26714 | 546 | } |
2ef84c95 DG |
547 | |
548 | /* | |
9f19cc17 | 549 | * Get the event list from the kernel tracer and return the number of elements. |
2ef84c95 | 550 | */ |
9f19cc17 | 551 | ssize_t kernel_list_events(int tracer_fd, struct lttng_event **events) |
2ef84c95 | 552 | { |
9f19cc17 DG |
553 | int fd, pos; |
554 | char *event; | |
555 | size_t nbmem, count = 0; | |
2ef84c95 DG |
556 | ssize_t size; |
557 | FILE *fp; | |
9f19cc17 | 558 | struct lttng_event *elist; |
2ef84c95 DG |
559 | |
560 | fd = kernctl_tracepoint_list(tracer_fd); | |
561 | if (fd < 0) { | |
562 | perror("kernel tracepoint list"); | |
563 | goto error; | |
564 | } | |
565 | ||
566 | fp = fdopen(fd, "r"); | |
567 | if (fp == NULL) { | |
568 | perror("kernel tracepoint list fdopen"); | |
61b73b12 | 569 | goto error_fp; |
2ef84c95 DG |
570 | } |
571 | ||
572 | /* | |
573 | * Init memory size counter | |
574 | * See kernel-ctl.h for explanation of this value | |
575 | */ | |
576 | nbmem = KERNEL_EVENT_LIST_SIZE; | |
ba7f0ae5 | 577 | elist = zmalloc(sizeof(struct lttng_event) * nbmem); |
2ef84c95 | 578 | |
9f19cc17 DG |
579 | while ((size = fscanf(fp, "event { name = %m[^;]; };%n\n", &event, &pos)) == 1) { |
580 | if (count > nbmem) { | |
ced2f820 | 581 | DBG("Reallocating event list from %zu to %zu bytes", nbmem, |
9f19cc17 | 582 | nbmem + KERNEL_EVENT_LIST_SIZE); |
2ef84c95 | 583 | /* Adding the default size again */ |
9f19cc17 | 584 | nbmem += KERNEL_EVENT_LIST_SIZE; |
2f221590 | 585 | elist = realloc(elist, nbmem * sizeof(struct lttng_event)); |
9f19cc17 | 586 | if (elist == NULL) { |
2ef84c95 | 587 | perror("realloc list events"); |
61b73b12 MD |
588 | count = -ENOMEM; |
589 | goto end; | |
2ef84c95 DG |
590 | } |
591 | } | |
99497cd0 MD |
592 | strncpy(elist[count].name, event, LTTNG_SYMBOL_NAME_LEN); |
593 | elist[count].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
9f19cc17 | 594 | count++; |
2ef84c95 DG |
595 | } |
596 | ||
9f19cc17 | 597 | *events = elist; |
ced2f820 | 598 | DBG("Kernel list events done (%zu events)", count); |
61b73b12 MD |
599 | end: |
600 | fclose(fp); /* closes both fp and fd */ | |
9f19cc17 | 601 | return count; |
2ef84c95 | 602 | |
61b73b12 MD |
603 | error_fp: |
604 | close(fd); | |
2ef84c95 DG |
605 | error: |
606 | return -1; | |
607 | } |