Commit | Line | Data |
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c39c72ee PMF |
1 | /* Copyright (C) 2009 Pierre-Marc Fournier |
2 | * | |
3 | * This library is free software; you can redistribute it and/or | |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
7 | * | |
8 | * This library is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public | |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
872037bb | 18 | #define _GNU_SOURCE |
68c1021b PMF |
19 | #include <stdio.h> |
20 | #include <stdint.h> | |
21 | #include <signal.h> | |
22 | #include <sys/types.h> | |
23 | #include <sys/socket.h> | |
24 | #include <sys/un.h> | |
98963de4 | 25 | #include <sched.h> |
a584bc4e | 26 | #include <fcntl.h> |
3a7b90de | 27 | #include <poll.h> |
ef290fca | 28 | #include <regex.h> |
fbd8191b | 29 | |
b7ea1a1c | 30 | #include <urcu-bp.h> |
26cc7017 | 31 | |
93d0f2ea | 32 | #include <ust/marker.h> |
616ed36a | 33 | #include <ust/tracectl.h> |
c93858f1 | 34 | #include "tracer.h" |
6af64c43 | 35 | #include "usterr.h" |
d0b5f2b9 | 36 | #include "ustcomm.h" |
b5b073e2 | 37 | #include "buffers.h" /* FIXME: remove */ |
9160b4e4 | 38 | #include "marker-control.h" |
fbd8191b | 39 | |
b02e31e5 | 40 | //#define USE_CLONE |
3847c3ba | 41 | |
68c1021b PMF |
42 | #define USTSIGNAL SIGIO |
43 | ||
98963de4 PMF |
44 | #define MAX_MSG_SIZE (100) |
45 | #define MSG_NOTIF 1 | |
46 | #define MSG_REGISTER_NOTIF 2 | |
47 | ||
a584bc4e PMF |
48 | char consumer_stack[10000]; |
49 | ||
ed1317e7 PMF |
50 | /* This should only be accessed by the constructor, before the creation |
51 | * of the listener, and then only by the listener. | |
52 | */ | |
53 | s64 pidunique = -1LL; | |
54 | ||
3a7b90de PMF |
55 | struct list_head blocked_consumers = LIST_HEAD_INIT(blocked_consumers); |
56 | ||
d0b5f2b9 PMF |
57 | static struct ustcomm_app ustcomm_app; |
58 | ||
68c1021b PMF |
59 | struct tracecmd { /* no padding */ |
60 | uint32_t size; | |
61 | uint16_t command; | |
62 | }; | |
63 | ||
f293009f PMF |
64 | /* volatile because shared between the listener and the main thread */ |
65 | volatile sig_atomic_t buffers_to_export = 0; | |
66 | ||
98963de4 PMF |
67 | struct trctl_msg { |
68 | /* size: the size of all the fields except size itself */ | |
69 | uint32_t size; | |
70 | uint16_t type; | |
71 | /* Only the necessary part of the payload is transferred. It | |
72 | * may even be none of it. | |
73 | */ | |
74 | char payload[94]; | |
75 | }; | |
68c1021b | 76 | |
a584bc4e PMF |
77 | struct consumer_channel { |
78 | int fd; | |
79 | struct ltt_channel_struct *chan; | |
80 | }; | |
81 | ||
3a7b90de PMF |
82 | struct blocked_consumer { |
83 | int fd_consumer; | |
84 | int fd_producer; | |
85 | int tmp_poll_idx; | |
86 | ||
87 | /* args to ustcomm_send_reply */ | |
88 | struct ustcomm_server server; | |
89 | struct ustcomm_source src; | |
90 | ||
b5b073e2 PMF |
91 | /* args to ust_buffers_do_get_subbuf */ |
92 | struct ust_buffer *buf; | |
3a7b90de PMF |
93 | |
94 | struct list_head list; | |
95 | }; | |
96 | ||
ed1317e7 PMF |
97 | static long long make_pidunique(void) |
98 | { | |
99 | s64 retval; | |
100 | struct timeval tv; | |
101 | ||
102 | gettimeofday(&tv, NULL); | |
103 | ||
104 | retval = tv.tv_sec; | |
105 | retval <<= 32; | |
106 | retval |= tv.tv_usec; | |
107 | ||
108 | return retval; | |
109 | } | |
110 | ||
52c51a47 | 111 | static void print_markers(FILE *fp) |
fbd8191b PMF |
112 | { |
113 | struct marker_iter iter; | |
114 | ||
d0b5f2b9 | 115 | lock_markers(); |
fbd8191b PMF |
116 | marker_iter_reset(&iter); |
117 | marker_iter_start(&iter); | |
118 | ||
119 | while(iter.marker) { | |
3ea1e2fc | 120 | fprintf(fp, "marker: %s/%s %d \"%s\" %p\n", iter.marker->channel, iter.marker->name, (int)imv_read(iter.marker->state), iter.marker->format, iter.marker->location); |
fbd8191b PMF |
121 | marker_iter_next(&iter); |
122 | } | |
d0b5f2b9 | 123 | unlock_markers(); |
fbd8191b PMF |
124 | } |
125 | ||
4440ebcb | 126 | static int init_socket(void); |
68c1021b | 127 | |
26cc7017 PMF |
128 | /* This needs to be called whenever a new thread is created. It notifies |
129 | * liburcu of the new thread. | |
130 | */ | |
131 | ||
132 | void ust_register_thread(void) | |
68c1021b | 133 | { |
26cc7017 | 134 | rcu_register_thread(); |
68c1021b PMF |
135 | } |
136 | ||
98963de4 PMF |
137 | int fd_notif = -1; |
138 | void notif_cb(void) | |
139 | { | |
140 | int result; | |
141 | struct trctl_msg msg; | |
142 | ||
143 | /* FIXME: fd_notif should probably be protected by a spinlock */ | |
144 | ||
145 | if(fd_notif == -1) | |
146 | return; | |
147 | ||
148 | msg.type = MSG_NOTIF; | |
149 | msg.size = sizeof(msg.type); | |
150 | ||
151 | /* FIXME: don't block here */ | |
152 | result = write(fd_notif, &msg, msg.size+sizeof(msg.size)); | |
153 | if(result == -1) { | |
154 | PERROR("write"); | |
155 | return; | |
156 | } | |
157 | } | |
158 | ||
ad45e833 PMF |
159 | /* Ask the daemon to collect a trace called trace_name and being |
160 | * produced by this pid. | |
161 | * | |
162 | * The trace must be at least allocated. (It can also be started.) | |
163 | * This is because _ltt_trace_find is used. | |
164 | */ | |
165 | ||
166 | static void inform_consumer_daemon(const char *trace_name) | |
d0b5f2b9 | 167 | { |
ad45e833 PMF |
168 | int i; |
169 | struct ltt_trace_struct *trace; | |
170 | pid_t pid = getpid(); | |
171 | int result; | |
172 | ||
173 | ltt_lock_traces(); | |
174 | ||
175 | trace = _ltt_trace_find(trace_name); | |
176 | if(trace == NULL) { | |
177 | WARN("inform_consumer_daemon: could not find trace \"%s\"; it is probably already destroyed", trace_name); | |
178 | goto finish; | |
179 | } | |
180 | ||
181 | for(i=0; i < trace->nr_channels; i++) { | |
182 | result = ustcomm_request_consumer(pid, trace->channels[i].channel_name); | |
183 | if(result == -1) { | |
184 | WARN("Failed to request collection for channel %s. Is the daemon available?", trace->channels[i].channel_name); | |
185 | /* continue even if fail */ | |
186 | } | |
f293009f | 187 | buffers_to_export++; |
ad45e833 PMF |
188 | } |
189 | ||
190 | finish: | |
191 | ltt_unlock_traces(); | |
d0b5f2b9 | 192 | } |
fbd8191b | 193 | |
3a7b90de PMF |
194 | void process_blocked_consumers(void) |
195 | { | |
196 | int n_fds = 0; | |
197 | struct pollfd *fds; | |
198 | struct blocked_consumer *bc; | |
199 | int idx = 0; | |
200 | char inbuf; | |
201 | int result; | |
202 | ||
203 | list_for_each_entry(bc, &blocked_consumers, list) { | |
204 | n_fds++; | |
205 | } | |
206 | ||
207 | fds = (struct pollfd *) malloc(n_fds * sizeof(struct pollfd)); | |
208 | if(fds == NULL) { | |
209 | ERR("malloc returned NULL"); | |
210 | return; | |
211 | } | |
212 | ||
213 | list_for_each_entry(bc, &blocked_consumers, list) { | |
214 | fds[idx].fd = bc->fd_producer; | |
215 | fds[idx].events = POLLIN; | |
216 | bc->tmp_poll_idx = idx; | |
217 | idx++; | |
218 | } | |
219 | ||
69ba0156 PMF |
220 | while((result = poll(fds, n_fds, 0)) == -1 && errno == EINTR) |
221 | /* nothing */; | |
3a7b90de PMF |
222 | if(result == -1) { |
223 | PERROR("poll"); | |
872037bb | 224 | return; |
3a7b90de PMF |
225 | } |
226 | ||
227 | list_for_each_entry(bc, &blocked_consumers, list) { | |
228 | if(fds[bc->tmp_poll_idx].revents) { | |
229 | long consumed_old = 0; | |
230 | char *reply; | |
231 | ||
232 | result = read(bc->fd_producer, &inbuf, 1); | |
233 | if(result == -1) { | |
234 | PERROR("read"); | |
235 | continue; | |
236 | } | |
237 | if(result == 0) { | |
238 | DBG("PRODUCER END"); | |
239 | ||
240 | close(bc->fd_producer); | |
241 | ||
769d0157 | 242 | list_del(&bc->list); |
3a7b90de PMF |
243 | |
244 | result = ustcomm_send_reply(&bc->server, "END", &bc->src); | |
245 | if(result < 0) { | |
246 | ERR("ustcomm_send_reply failed"); | |
247 | continue; | |
248 | } | |
249 | ||
250 | continue; | |
251 | } | |
252 | ||
b5b073e2 | 253 | result = ust_buffers_do_get_subbuf(bc->buf, &consumed_old); |
3a7b90de PMF |
254 | if(result == -EAGAIN) { |
255 | WARN("missed buffer?"); | |
256 | continue; | |
257 | } | |
258 | else if(result < 0) { | |
b5b073e2 | 259 | DBG("ust_buffers_do_get_subbuf: error: %s", strerror(-result)); |
3a7b90de PMF |
260 | } |
261 | asprintf(&reply, "%s %ld", "OK", consumed_old); | |
262 | result = ustcomm_send_reply(&bc->server, reply, &bc->src); | |
263 | if(result < 0) { | |
264 | ERR("ustcomm_send_reply failed"); | |
265 | free(reply); | |
266 | continue; | |
267 | } | |
268 | free(reply); | |
269 | ||
769d0157 | 270 | list_del(&bc->list); |
3a7b90de PMF |
271 | } |
272 | } | |
273 | ||
274 | } | |
275 | ||
872037bb | 276 | void *listener_main(void *p) |
98963de4 PMF |
277 | { |
278 | int result; | |
279 | ||
26cc7017 PMF |
280 | ust_register_thread(); |
281 | ||
b0540e11 PMF |
282 | DBG("LISTENER"); |
283 | ||
98963de4 | 284 | for(;;) { |
aafb1650 PMF |
285 | char trace_name[] = "auto"; |
286 | char trace_type[] = "ustrelay"; | |
d0b5f2b9 PMF |
287 | char *recvbuf; |
288 | int len; | |
b02e31e5 | 289 | struct ustcomm_source src; |
98963de4 | 290 | |
3a7b90de PMF |
291 | process_blocked_consumers(); |
292 | ||
293 | result = ustcomm_app_recv_message(&ustcomm_app, &recvbuf, &src, 5); | |
294 | if(result < 0) { | |
d0b5f2b9 PMF |
295 | WARN("error in ustcomm_app_recv_message"); |
296 | continue; | |
297 | } | |
3a7b90de PMF |
298 | else if(result == 0) { |
299 | /* no message */ | |
300 | continue; | |
301 | } | |
98963de4 | 302 | |
08230db7 | 303 | DBG("received a message! it's: %s", recvbuf); |
d0b5f2b9 | 304 | len = strlen(recvbuf); |
98963de4 | 305 | |
d0b5f2b9 | 306 | if(!strcmp(recvbuf, "print_markers")) { |
52c51a47 PMF |
307 | print_markers(stderr); |
308 | } | |
309 | else if(!strcmp(recvbuf, "list_markers")) { | |
310 | char *ptr; | |
311 | size_t size; | |
312 | FILE *fp; | |
313 | ||
314 | fp = open_memstream(&ptr, &size); | |
315 | print_markers(fp); | |
316 | fclose(fp); | |
317 | ||
318 | result = ustcomm_send_reply(&ustcomm_app.server, ptr, &src); | |
319 | ||
320 | free(ptr); | |
321 | } | |
322 | else if(!strcmp(recvbuf, "start")) { | |
323 | /* start is an operation that setups the trace, allocates it and starts it */ | |
324 | result = ltt_trace_setup(trace_name); | |
325 | if(result < 0) { | |
326 | ERR("ltt_trace_setup failed"); | |
872037bb | 327 | return (void *)1; |
52c51a47 PMF |
328 | } |
329 | ||
330 | result = ltt_trace_set_type(trace_name, trace_type); | |
331 | if(result < 0) { | |
332 | ERR("ltt_trace_set_type failed"); | |
872037bb | 333 | return (void *)1; |
52c51a47 PMF |
334 | } |
335 | ||
336 | result = ltt_trace_alloc(trace_name); | |
337 | if(result < 0) { | |
338 | ERR("ltt_trace_alloc failed"); | |
872037bb | 339 | return (void *)1; |
52c51a47 PMF |
340 | } |
341 | ||
ad45e833 | 342 | inform_consumer_daemon(trace_name); |
52c51a47 PMF |
343 | |
344 | result = ltt_trace_start(trace_name); | |
345 | if(result < 0) { | |
346 | ERR("ltt_trace_start failed"); | |
347 | continue; | |
348 | } | |
d0b5f2b9 PMF |
349 | } |
350 | else if(!strcmp(recvbuf, "trace_setup")) { | |
351 | DBG("trace setup"); | |
fbd8191b | 352 | |
d0b5f2b9 PMF |
353 | result = ltt_trace_setup(trace_name); |
354 | if(result < 0) { | |
355 | ERR("ltt_trace_setup failed"); | |
872037bb | 356 | return (void *)1; |
fbd8191b | 357 | } |
d0b5f2b9 PMF |
358 | |
359 | result = ltt_trace_set_type(trace_name, trace_type); | |
360 | if(result < 0) { | |
361 | ERR("ltt_trace_set_type failed"); | |
872037bb | 362 | return (void *)1; |
fbd8191b | 363 | } |
d0b5f2b9 PMF |
364 | } |
365 | else if(!strcmp(recvbuf, "trace_alloc")) { | |
366 | DBG("trace alloc"); | |
367 | ||
368 | result = ltt_trace_alloc(trace_name); | |
369 | if(result < 0) { | |
370 | ERR("ltt_trace_alloc failed"); | |
872037bb | 371 | return (void *)1; |
fbd8191b | 372 | } |
d0b5f2b9 | 373 | } |
62ec620f PMF |
374 | else if(!strcmp(recvbuf, "trace_create")) { |
375 | DBG("trace create"); | |
376 | ||
377 | result = ltt_trace_setup(trace_name); | |
378 | if(result < 0) { | |
379 | ERR("ltt_trace_setup failed"); | |
380 | return (void *)1; | |
381 | } | |
382 | ||
383 | result = ltt_trace_set_type(trace_name, trace_type); | |
384 | if(result < 0) { | |
385 | ERR("ltt_trace_set_type failed"); | |
386 | return (void *)1; | |
387 | } | |
388 | ||
389 | result = ltt_trace_alloc(trace_name); | |
390 | if(result < 0) { | |
391 | ERR("ltt_trace_alloc failed"); | |
392 | return (void *)1; | |
393 | } | |
394 | ||
395 | inform_consumer_daemon(trace_name); | |
396 | } | |
d0b5f2b9 PMF |
397 | else if(!strcmp(recvbuf, "trace_start")) { |
398 | DBG("trace start"); | |
399 | ||
400 | result = ltt_trace_start(trace_name); | |
401 | if(result < 0) { | |
402 | ERR("ltt_trace_start failed"); | |
403 | continue; | |
fbd8191b | 404 | } |
d0b5f2b9 PMF |
405 | } |
406 | else if(!strcmp(recvbuf, "trace_stop")) { | |
407 | DBG("trace stop"); | |
408 | ||
409 | result = ltt_trace_stop(trace_name); | |
410 | if(result < 0) { | |
411 | ERR("ltt_trace_stop failed"); | |
872037bb | 412 | return (void *)1; |
aafb1650 | 413 | } |
d0b5f2b9 PMF |
414 | } |
415 | else if(!strcmp(recvbuf, "trace_destroy")) { | |
aafb1650 | 416 | |
d0b5f2b9 | 417 | DBG("trace destroy"); |
aafb1650 | 418 | |
d0b5f2b9 PMF |
419 | result = ltt_trace_destroy(trace_name); |
420 | if(result < 0) { | |
421 | ERR("ltt_trace_destroy failed"); | |
872037bb | 422 | return (void *)1; |
fbd8191b | 423 | } |
98963de4 | 424 | } |
b02e31e5 | 425 | else if(nth_token_is(recvbuf, "get_shmid", 0) == 1) { |
3847c3ba PMF |
426 | struct ltt_trace_struct *trace; |
427 | char trace_name[] = "auto"; | |
428 | int i; | |
811e4b93 | 429 | char *channel_name; |
3847c3ba PMF |
430 | |
431 | DBG("get_shmid"); | |
432 | ||
811e4b93 PMF |
433 | channel_name = nth_token(recvbuf, 1); |
434 | if(channel_name == NULL) { | |
435 | ERR("get_shmid: cannot parse channel"); | |
436 | goto next_cmd; | |
437 | } | |
438 | ||
3847c3ba PMF |
439 | ltt_lock_traces(); |
440 | trace = _ltt_trace_find(trace_name); | |
441 | ltt_unlock_traces(); | |
442 | ||
443 | if(trace == NULL) { | |
63fe14e5 | 444 | ERR("cannot find trace!"); |
872037bb | 445 | return (void *)1; |
3847c3ba PMF |
446 | } |
447 | ||
448 | for(i=0; i<trace->nr_channels; i++) { | |
b5b073e2 PMF |
449 | struct ust_channel *channel = &trace->channels[i]; |
450 | struct ust_buffer *buf = channel->buf; | |
3847c3ba | 451 | |
811e4b93 PMF |
452 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { |
453 | char *reply; | |
454 | ||
b5b073e2 PMF |
455 | DBG("the shmid for the requested channel is %d", buf->shmid); |
456 | DBG("the shmid for its buffer structure is %d", channel->buf_shmid); | |
457 | asprintf(&reply, "%d %d", buf->shmid, channel->buf_shmid); | |
811e4b93 PMF |
458 | |
459 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
460 | if(result) { | |
461 | ERR("listener: get_shmid: ustcomm_send_reply failed"); | |
462 | goto next_cmd; | |
463 | } | |
464 | ||
465 | free(reply); | |
466 | ||
467 | break; | |
468 | } | |
469 | } | |
f293009f PMF |
470 | |
471 | buffers_to_export--; | |
811e4b93 PMF |
472 | } |
473 | else if(nth_token_is(recvbuf, "get_n_subbufs", 0) == 1) { | |
474 | struct ltt_trace_struct *trace; | |
475 | char trace_name[] = "auto"; | |
476 | int i; | |
477 | char *channel_name; | |
478 | ||
479 | DBG("get_n_subbufs"); | |
480 | ||
481 | channel_name = nth_token(recvbuf, 1); | |
482 | if(channel_name == NULL) { | |
483 | ERR("get_n_subbufs: cannot parse channel"); | |
484 | goto next_cmd; | |
485 | } | |
486 | ||
487 | ltt_lock_traces(); | |
488 | trace = _ltt_trace_find(trace_name); | |
489 | ltt_unlock_traces(); | |
490 | ||
491 | if(trace == NULL) { | |
63fe14e5 | 492 | ERR("cannot find trace!"); |
872037bb | 493 | return (void *)1; |
811e4b93 PMF |
494 | } |
495 | ||
496 | for(i=0; i<trace->nr_channels; i++) { | |
b5b073e2 | 497 | struct ust_channel *channel = &trace->channels[i]; |
811e4b93 PMF |
498 | |
499 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
500 | char *reply; | |
501 | ||
b5b073e2 PMF |
502 | DBG("the n_subbufs for the requested channel is %d", channel->subbuf_cnt); |
503 | asprintf(&reply, "%d", channel->subbuf_cnt); | |
811e4b93 PMF |
504 | |
505 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
506 | if(result) { | |
507 | ERR("listener: get_n_subbufs: ustcomm_send_reply failed"); | |
508 | goto next_cmd; | |
509 | } | |
510 | ||
511 | free(reply); | |
512 | ||
513 | break; | |
514 | } | |
515 | } | |
516 | } | |
517 | else if(nth_token_is(recvbuf, "get_subbuf_size", 0) == 1) { | |
518 | struct ltt_trace_struct *trace; | |
519 | char trace_name[] = "auto"; | |
520 | int i; | |
521 | char *channel_name; | |
522 | ||
523 | DBG("get_subbuf_size"); | |
524 | ||
525 | channel_name = nth_token(recvbuf, 1); | |
526 | if(channel_name == NULL) { | |
527 | ERR("get_subbuf_size: cannot parse channel"); | |
528 | goto next_cmd; | |
529 | } | |
530 | ||
531 | ltt_lock_traces(); | |
532 | trace = _ltt_trace_find(trace_name); | |
533 | ltt_unlock_traces(); | |
534 | ||
535 | if(trace == NULL) { | |
63fe14e5 | 536 | ERR("cannot find trace!"); |
872037bb | 537 | return (void *)1; |
811e4b93 PMF |
538 | } |
539 | ||
540 | for(i=0; i<trace->nr_channels; i++) { | |
b5b073e2 | 541 | struct ust_channel *channel = &trace->channels[i]; |
811e4b93 PMF |
542 | |
543 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
544 | char *reply; | |
545 | ||
b5b073e2 PMF |
546 | DBG("the subbuf_size for the requested channel is %zd", channel->subbuf_size); |
547 | asprintf(&reply, "%zd", channel->subbuf_size); | |
811e4b93 PMF |
548 | |
549 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
550 | if(result) { | |
551 | ERR("listener: get_subbuf_size: ustcomm_send_reply failed"); | |
552 | goto next_cmd; | |
553 | } | |
554 | ||
555 | free(reply); | |
3847c3ba | 556 | |
811e4b93 PMF |
557 | break; |
558 | } | |
3847c3ba PMF |
559 | } |
560 | } | |
b02e31e5 PMF |
561 | else if(nth_token_is(recvbuf, "load_probe_lib", 0) == 1) { |
562 | char *libfile; | |
563 | ||
564 | libfile = nth_token(recvbuf, 1); | |
565 | ||
566 | DBG("load_probe_lib loading %s", libfile); | |
567 | } | |
688760ef PMF |
568 | else if(nth_token_is(recvbuf, "get_subbuffer", 0) == 1) { |
569 | struct ltt_trace_struct *trace; | |
570 | char trace_name[] = "auto"; | |
571 | int i; | |
572 | char *channel_name; | |
573 | ||
574 | DBG("get_subbuf"); | |
575 | ||
576 | channel_name = nth_token(recvbuf, 1); | |
577 | if(channel_name == NULL) { | |
578 | ERR("get_subbuf: cannot parse channel"); | |
579 | goto next_cmd; | |
580 | } | |
581 | ||
582 | ltt_lock_traces(); | |
583 | trace = _ltt_trace_find(trace_name); | |
584 | ltt_unlock_traces(); | |
585 | ||
586 | if(trace == NULL) { | |
63fe14e5 | 587 | ERR("cannot find trace!"); |
872037bb | 588 | return (void *)1; |
688760ef PMF |
589 | } |
590 | ||
591 | for(i=0; i<trace->nr_channels; i++) { | |
b5b073e2 | 592 | struct ust_channel *channel = &trace->channels[i]; |
688760ef PMF |
593 | |
594 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
b5b073e2 | 595 | struct ust_buffer *buf = channel->buf; |
3a7b90de | 596 | struct blocked_consumer *bc; |
688760ef | 597 | |
3a7b90de PMF |
598 | bc = (struct blocked_consumer *) malloc(sizeof(struct blocked_consumer)); |
599 | if(bc == NULL) { | |
600 | ERR("malloc returned NULL"); | |
688760ef PMF |
601 | goto next_cmd; |
602 | } | |
3a7b90de | 603 | bc->fd_consumer = src.fd; |
b5b073e2 PMF |
604 | bc->fd_producer = buf->data_ready_fd_read; |
605 | bc->buf = buf; | |
3a7b90de PMF |
606 | bc->src = src; |
607 | bc->server = ustcomm_app.server; | |
688760ef | 608 | |
3a7b90de | 609 | list_add(&bc->list, &blocked_consumers); |
688760ef PMF |
610 | |
611 | break; | |
612 | } | |
613 | } | |
614 | } | |
615 | else if(nth_token_is(recvbuf, "put_subbuffer", 0) == 1) { | |
616 | struct ltt_trace_struct *trace; | |
617 | char trace_name[] = "auto"; | |
618 | int i; | |
619 | char *channel_name; | |
620 | long consumed_old; | |
621 | char *consumed_old_str; | |
622 | char *endptr; | |
623 | ||
624 | DBG("put_subbuf"); | |
625 | ||
626 | channel_name = strdup_malloc(nth_token(recvbuf, 1)); | |
627 | if(channel_name == NULL) { | |
628 | ERR("put_subbuf_size: cannot parse channel"); | |
629 | goto next_cmd; | |
630 | } | |
631 | ||
632 | consumed_old_str = strdup_malloc(nth_token(recvbuf, 2)); | |
633 | if(consumed_old_str == NULL) { | |
634 | ERR("put_subbuf: cannot parse consumed_old"); | |
635 | goto next_cmd; | |
636 | } | |
637 | consumed_old = strtol(consumed_old_str, &endptr, 10); | |
638 | if(*endptr != '\0') { | |
639 | ERR("put_subbuf: invalid value for consumed_old"); | |
640 | goto next_cmd; | |
641 | } | |
642 | ||
643 | ltt_lock_traces(); | |
644 | trace = _ltt_trace_find(trace_name); | |
645 | ltt_unlock_traces(); | |
646 | ||
647 | if(trace == NULL) { | |
63fe14e5 | 648 | ERR("cannot find trace!"); |
872037bb | 649 | return (void *)1; |
688760ef PMF |
650 | } |
651 | ||
652 | for(i=0; i<trace->nr_channels; i++) { | |
b5b073e2 | 653 | struct ust_channel *channel = &trace->channels[i]; |
688760ef PMF |
654 | |
655 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
b5b073e2 | 656 | struct ust_buffer *buf = channel->buf; |
688760ef PMF |
657 | char *reply; |
658 | long consumed_old=0; | |
659 | ||
b5b073e2 | 660 | result = ust_buffers_do_put_subbuf(buf, consumed_old); |
688760ef | 661 | if(result < 0) { |
b5b073e2 | 662 | WARN("ust_buffers_do_put_subbuf: error (subbuf=%s)", channel_name); |
872037bb | 663 | asprintf(&reply, "%s", "ERROR"); |
688760ef PMF |
664 | } |
665 | else { | |
b5b073e2 | 666 | DBG("ust_buffers_do_put_subbuf: success (subbuf=%s)", channel_name); |
872037bb | 667 | asprintf(&reply, "%s", "OK"); |
688760ef | 668 | } |
688760ef PMF |
669 | |
670 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
671 | if(result) { | |
672 | ERR("listener: put_subbuf: ustcomm_send_reply failed"); | |
673 | goto next_cmd; | |
674 | } | |
675 | ||
676 | free(reply); | |
677 | ||
678 | break; | |
679 | } | |
680 | } | |
681 | ||
682 | free(channel_name); | |
683 | free(consumed_old_str); | |
684 | } | |
52c51a47 PMF |
685 | else if(nth_token_is(recvbuf, "enable_marker", 0) == 1) { |
686 | char *channel_slash_name = nth_token(recvbuf, 1); | |
687 | char channel_name[256]=""; | |
688 | char marker_name[256]=""; | |
52c51a47 PMF |
689 | |
690 | result = sscanf(channel_slash_name, "%255[^/]/%255s", channel_name, marker_name); | |
691 | ||
692 | if(channel_name == NULL || marker_name == NULL) { | |
693 | WARN("invalid marker name"); | |
694 | goto next_cmd; | |
695 | } | |
52c51a47 PMF |
696 | |
697 | result = ltt_marker_connect(channel_name, marker_name, "default"); | |
698 | if(result < 0) { | |
699 | WARN("could not enable marker; channel=%s, name=%s", channel_name, marker_name); | |
700 | } | |
701 | } | |
702 | else if(nth_token_is(recvbuf, "disable_marker", 0) == 1) { | |
703 | char *channel_slash_name = nth_token(recvbuf, 1); | |
704 | char *marker_name; | |
705 | char *channel_name; | |
52c51a47 PMF |
706 | |
707 | result = sscanf(channel_slash_name, "%a[^/]/%as", &channel_name, &marker_name); | |
708 | ||
709 | if(marker_name == NULL) { | |
710 | } | |
52c51a47 PMF |
711 | |
712 | result = ltt_marker_disconnect(channel_name, marker_name, "default"); | |
713 | if(result < 0) { | |
714 | WARN("could not disable marker; channel=%s, name=%s", channel_name, marker_name); | |
715 | } | |
716 | } | |
ed1317e7 PMF |
717 | else if(nth_token_is(recvbuf, "get_pidunique", 0) == 1) { |
718 | char *reply; | |
719 | ||
720 | asprintf(&reply, "%lld", pidunique); | |
721 | ||
722 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
723 | if(result) { | |
724 | ERR("listener: get_pidunique: ustcomm_send_reply failed"); | |
725 | goto next_cmd; | |
726 | } | |
727 | ||
728 | free(reply); | |
729 | } | |
3a7b90de PMF |
730 | // else if(nth_token_is(recvbuf, "get_notifications", 0) == 1) { |
731 | // struct ltt_trace_struct *trace; | |
732 | // char trace_name[] = "auto"; | |
733 | // int i; | |
734 | // char *channel_name; | |
735 | // | |
736 | // DBG("get_notifications"); | |
737 | // | |
738 | // channel_name = strdup_malloc(nth_token(recvbuf, 1)); | |
739 | // if(channel_name == NULL) { | |
740 | // ERR("put_subbuf_size: cannot parse channel"); | |
741 | // goto next_cmd; | |
742 | // } | |
743 | // | |
744 | // ltt_lock_traces(); | |
745 | // trace = _ltt_trace_find(trace_name); | |
746 | // ltt_unlock_traces(); | |
747 | // | |
748 | // if(trace == NULL) { | |
63fe14e5 | 749 | // ERR("cannot find trace!"); |
872037bb | 750 | // return (void *)1; |
3a7b90de PMF |
751 | // } |
752 | // | |
753 | // for(i=0; i<trace->nr_channels; i++) { | |
754 | // struct rchan *rchan = trace->channels[i].trans_channel_data; | |
755 | // int fd; | |
756 | // | |
757 | // if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
758 | // struct rchan_buf *rbuf = rchan->buf; | |
759 | // struct ltt_channel_buf_struct *lttbuf = trace->channels[i].buf; | |
760 | // | |
761 | // result = fd = ustcomm_app_detach_client(&ustcomm_app, &src); | |
762 | // if(result == -1) { | |
763 | // ERR("ustcomm_app_detach_client failed"); | |
764 | // goto next_cmd; | |
765 | // } | |
766 | // | |
767 | // lttbuf->wake_consumer_arg = (void *) fd; | |
768 | // | |
769 | // smp_wmb(); | |
770 | // | |
771 | // lttbuf->call_wake_consumer = 1; | |
772 | // | |
773 | // break; | |
774 | // } | |
775 | // } | |
776 | // | |
777 | // free(channel_name); | |
778 | // } | |
688760ef PMF |
779 | else { |
780 | ERR("unable to parse message: %s", recvbuf); | |
781 | } | |
d0b5f2b9 | 782 | |
811e4b93 | 783 | next_cmd: |
d0b5f2b9 | 784 | free(recvbuf); |
98963de4 PMF |
785 | } |
786 | } | |
787 | ||
7958de40 | 788 | volatile sig_atomic_t have_listener = 0; |
4440ebcb | 789 | |
98963de4 PMF |
790 | void create_listener(void) |
791 | { | |
9160b4e4 | 792 | #ifdef USE_CLONE |
98963de4 | 793 | static char listener_stack[16384]; |
c5fdc888 | 794 | int result; |
4440ebcb PMF |
795 | #else |
796 | pthread_t thread; | |
9160b4e4 | 797 | #endif |
98963de4 | 798 | |
c5fdc888 PMF |
799 | if(have_listener) { |
800 | WARN("not creating listener because we already had one"); | |
4440ebcb | 801 | return; |
c5fdc888 | 802 | } |
4440ebcb | 803 | |
3847c3ba | 804 | #ifdef USE_CLONE |
c5fdc888 | 805 | result = clone((int (*)(void *)) listener_main, listener_stack+sizeof(listener_stack)-1, CLONE_FS | CLONE_FILES | CLONE_VM | CLONE_SIGHAND | CLONE_THREAD, NULL); |
98963de4 PMF |
806 | if(result == -1) { |
807 | perror("clone"); | |
4440ebcb | 808 | return; |
98963de4 | 809 | } |
3847c3ba | 810 | #else |
b0540e11 | 811 | |
3847c3ba PMF |
812 | pthread_create(&thread, NULL, listener_main, NULL); |
813 | #endif | |
4440ebcb PMF |
814 | |
815 | have_listener = 1; | |
98963de4 PMF |
816 | } |
817 | ||
98963de4 | 818 | static int init_socket(void) |
68c1021b | 819 | { |
d0b5f2b9 | 820 | return ustcomm_init_app(getpid(), &ustcomm_app); |
68c1021b PMF |
821 | } |
822 | ||
5de74e51 PMF |
823 | #define AUTOPROBE_DISABLED 0 |
824 | #define AUTOPROBE_ENABLE_ALL 1 | |
825 | #define AUTOPROBE_ENABLE_REGEX 2 | |
826 | static int autoprobe_method = AUTOPROBE_DISABLED; | |
827 | static regex_t autoprobe_regex; | |
ef290fca | 828 | |
20b37a31 | 829 | static void auto_probe_connect(struct marker *m) |
68c1021b PMF |
830 | { |
831 | int result; | |
832 | ||
5de74e51 PMF |
833 | char* concat_name = NULL; |
834 | const char *probe_name = "default"; | |
ef290fca | 835 | |
5de74e51 | 836 | if(autoprobe_method == AUTOPROBE_DISABLED) { |
ef290fca PMF |
837 | return; |
838 | } | |
5de74e51 PMF |
839 | else if(autoprobe_method == AUTOPROBE_ENABLE_REGEX) { |
840 | result = asprintf(&concat_name, "%s/%s", m->channel, m->name); | |
841 | if(result == -1) { | |
842 | ERR("auto_probe_connect: asprintf failed (marker %s/%s)", | |
843 | m->channel, m->name); | |
844 | return; | |
845 | } | |
846 | if (regexec(&autoprobe_regex, concat_name, 0, NULL, 0)) { | |
847 | free(concat_name); | |
848 | return; | |
849 | } | |
850 | free(concat_name); | |
ef290fca PMF |
851 | } |
852 | ||
5de74e51 | 853 | result = ltt_marker_connect(m->channel, m->name, probe_name); |
acbf228b PMF |
854 | if(result && result != -EEXIST) |
855 | ERR("ltt_marker_connect (marker = %s/%s, errno = %d)", m->channel, m->name, -result); | |
20b37a31 | 856 | |
3ea1e2fc | 857 | DBG("auto connected marker %s (addr: %p) %s to probe default", m->channel, m, m->name); |
ef290fca | 858 | |
20b37a31 PMF |
859 | } |
860 | ||
c1083aa8 | 861 | static void __attribute__((constructor)) init() |
20b37a31 PMF |
862 | { |
863 | int result; | |
5de74e51 | 864 | char* autoprobe_val = NULL; |
20b37a31 | 865 | |
ed1317e7 PMF |
866 | /* Assign the pidunique, to be able to differentiate the processes with same |
867 | * pid, (before and after an exec). | |
868 | */ | |
869 | pidunique = make_pidunique(); | |
870 | ||
4440ebcb PMF |
871 | /* Initialize RCU in case the constructor order is not good. */ |
872 | urcu_init(); | |
873 | ||
874 | /* It is important to do this before events start to be generated. */ | |
875 | ust_register_thread(); | |
876 | ||
5de74e51 | 877 | DBG("Tracectl constructor"); |
20b37a31 | 878 | |
3847c3ba PMF |
879 | /* Must create socket before signal handler to prevent races. |
880 | */ | |
881 | result = init_socket(); | |
882 | if(result == -1) { | |
883 | ERR("init_socket error"); | |
884 | return; | |
885 | } | |
2944a629 PMF |
886 | |
887 | create_listener(); | |
68c1021b | 888 | |
5de74e51 PMF |
889 | autoprobe_val = getenv("UST_AUTOPROBE"); |
890 | if(autoprobe_val) { | |
4440ebcb PMF |
891 | struct marker_iter iter; |
892 | ||
08230db7 | 893 | DBG("Autoprobe enabled."); |
4440ebcb PMF |
894 | |
895 | /* Ensure markers are initialized */ | |
896 | //init_markers(); | |
897 | ||
898 | /* Ensure marker control is initialized, for the probe */ | |
899 | init_marker_control(); | |
900 | ||
901 | /* first, set the callback that will connect the | |
902 | * probe on new markers | |
903 | */ | |
5de74e51 PMF |
904 | if(autoprobe_val[0] == '/') { |
905 | result = regcomp(&autoprobe_regex, autoprobe_val+1, 0); | |
906 | if (result) { | |
907 | char regexerr[150]; | |
908 | ||
909 | regerror(result, &autoprobe_regex, regexerr, sizeof(regexerr)); | |
910 | ERR("cannot parse regex %s (%s), will ignore UST_AUTOPROBE", autoprobe_val, regexerr); | |
911 | /* don't crash the application just for this */ | |
912 | } | |
913 | else { | |
914 | autoprobe_method = AUTOPROBE_ENABLE_REGEX; | |
915 | } | |
ef290fca | 916 | } |
5de74e51 PMF |
917 | else { |
918 | /* just enable all instrumentation */ | |
919 | autoprobe_method = AUTOPROBE_ENABLE_ALL; | |
920 | } | |
921 | ||
922 | marker_set_new_marker_cb(auto_probe_connect); | |
923 | ||
4440ebcb PMF |
924 | /* Now, connect the probes that were already registered. */ |
925 | marker_iter_reset(&iter); | |
926 | marker_iter_start(&iter); | |
927 | ||
08230db7 | 928 | DBG("now iterating on markers already registered"); |
4440ebcb | 929 | while(iter.marker) { |
08230db7 | 930 | DBG("now iterating on marker %s", iter.marker->name); |
4440ebcb PMF |
931 | auto_probe_connect(iter.marker); |
932 | marker_iter_next(&iter); | |
933 | } | |
934 | } | |
935 | ||
4db647c5 PMF |
936 | if(getenv("UST_TRACE")) { |
937 | char trace_name[] = "auto"; | |
938 | char trace_type[] = "ustrelay"; | |
939 | ||
940 | DBG("starting early tracing"); | |
941 | ||
942 | /* Ensure marker control is initialized */ | |
943 | init_marker_control(); | |
944 | ||
945 | /* Ensure relay is initialized */ | |
946 | init_ustrelay_transport(); | |
947 | ||
948 | /* Ensure markers are initialized */ | |
949 | init_markers(); | |
950 | ||
027ffc9d PMF |
951 | /* FIXME: When starting early tracing (here), depending on the |
952 | * order of constructors, it is very well possible some marker | |
953 | * sections are not yet registered. Because of this, some | |
954 | * channels may not be registered. Yet, we are about to ask the | |
955 | * daemon to collect the channels. Channels which are not yet | |
956 | * registered will not be collected. | |
957 | * | |
958 | * Currently, in LTTng, there is no way to add a channel after | |
959 | * trace start. The reason for this is that it induces complex | |
960 | * concurrency issues on the trace structures, which can only | |
961 | * be resolved using RCU. This has not been done yet. As a | |
962 | * workaround, we are forcing the registration of the "ust" | |
963 | * channel here. This is the only channel (apart from metadata) | |
964 | * that can be reliably used in early tracing. | |
965 | * | |
966 | * Non-early tracing does not have this problem and can use | |
967 | * arbitrary channel names. | |
968 | */ | |
20b37a31 | 969 | ltt_channels_register("ust"); |
4db647c5 PMF |
970 | |
971 | result = ltt_trace_setup(trace_name); | |
972 | if(result < 0) { | |
973 | ERR("ltt_trace_setup failed"); | |
974 | return; | |
975 | } | |
976 | ||
977 | result = ltt_trace_set_type(trace_name, trace_type); | |
978 | if(result < 0) { | |
979 | ERR("ltt_trace_set_type failed"); | |
980 | return; | |
981 | } | |
982 | ||
983 | result = ltt_trace_alloc(trace_name); | |
984 | if(result < 0) { | |
985 | ERR("ltt_trace_alloc failed"); | |
986 | return; | |
987 | } | |
988 | ||
989 | result = ltt_trace_start(trace_name); | |
990 | if(result < 0) { | |
991 | ERR("ltt_trace_start failed"); | |
992 | return; | |
993 | } | |
60e57148 PMF |
994 | |
995 | /* Do this after the trace is started in order to avoid creating confusion | |
996 | * if the trace fails to start. */ | |
997 | inform_consumer_daemon(trace_name); | |
4db647c5 PMF |
998 | } |
999 | ||
68c1021b PMF |
1000 | |
1001 | return; | |
1002 | ||
1003 | /* should decrementally destroy stuff if error */ | |
1004 | ||
1005 | } | |
1006 | ||
1007 | /* This is only called if we terminate normally, not with an unhandled signal, | |
6d45c11a PMF |
1008 | * so we cannot rely on it. However, for now, LTTV requires that the header of |
1009 | * the last sub-buffer contain a valid end time for the trace. This is done | |
1010 | * automatically only when the trace is properly stopped. | |
1011 | * | |
1012 | * If the traced program crashed, it is always possible to manually add the | |
1013 | * right value in the header, or to open the trace in text mode. | |
1014 | * | |
1015 | * FIXME: Fix LTTV so it doesn't need this. | |
1016 | */ | |
68c1021b | 1017 | |
6d45c11a | 1018 | static void destroy_traces(void) |
68c1021b | 1019 | { |
6d45c11a | 1020 | int result; |
a584bc4e PMF |
1021 | |
1022 | /* if trace running, finish it */ | |
1023 | ||
6d45c11a | 1024 | DBG("destructor stopping traces"); |
a584bc4e | 1025 | |
6d45c11a PMF |
1026 | result = ltt_trace_stop("auto"); |
1027 | if(result == -1) { | |
1028 | ERR("ltt_trace_stop error"); | |
1029 | } | |
1030 | ||
1031 | result = ltt_trace_destroy("auto"); | |
1032 | if(result == -1) { | |
1033 | ERR("ltt_trace_destroy error"); | |
1034 | } | |
68c1021b | 1035 | } |
1e2944cb | 1036 | |
97d9b88b PMF |
1037 | static int trace_recording(void) |
1038 | { | |
1039 | int retval = 0; | |
1040 | struct ltt_trace_struct *trace; | |
1041 | ||
1042 | ltt_lock_traces(); | |
1043 | ||
1044 | list_for_each_entry(trace, <t_traces.head, list) { | |
1045 | if(trace->active) { | |
1046 | retval = 1; | |
1047 | break; | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | ltt_unlock_traces(); | |
1052 | ||
1053 | return retval; | |
1054 | } | |
1055 | ||
f293009f | 1056 | #if 0 |
97d9b88b PMF |
1057 | static int have_consumer(void) |
1058 | { | |
1059 | return !list_empty(&blocked_consumers); | |
1060 | } | |
f293009f | 1061 | #endif |
97d9b88b | 1062 | |
f293009f | 1063 | int restarting_usleep(useconds_t usecs) |
97d9b88b PMF |
1064 | { |
1065 | struct timespec tv; | |
1066 | int result; | |
1067 | ||
f293009f PMF |
1068 | tv.tv_sec = 0; |
1069 | tv.tv_nsec = usecs * 1000; | |
97d9b88b PMF |
1070 | |
1071 | do { | |
1072 | result = nanosleep(&tv, &tv); | |
1073 | } while(result == -1 && errno == EINTR); | |
1074 | ||
1075 | return result; | |
1076 | } | |
1077 | ||
f293009f PMF |
1078 | /* This destructor keeps the process alive for a few seconds in order |
1079 | * to leave time to ustd to connect to its buffers. This is necessary | |
1080 | * for programs whose execution is very short. It is also useful in all | |
1081 | * programs when tracing is started close to the end of the program | |
1082 | * execution. | |
1083 | * | |
1084 | * FIXME: For now, this only works for the first trace created in a | |
1085 | * process. | |
1086 | */ | |
1087 | ||
97d9b88b PMF |
1088 | static void __attribute__((destructor)) keepalive() |
1089 | { | |
f293009f | 1090 | if(trace_recording() && buffers_to_export) { |
c472cce0 | 1091 | int total = 0; |
f293009f PMF |
1092 | DBG("Keeping process alive for consumer daemon..."); |
1093 | while(buffers_to_export) { | |
1094 | const int interv = 200000; | |
c472cce0 | 1095 | restarting_usleep(interv); |
f293009f PMF |
1096 | total += interv; |
1097 | ||
1098 | if(total >= 3000000) { | |
c472cce0 | 1099 | WARN("non-consumed buffers remaining after wait limit; not waiting anymore"); |
f293009f PMF |
1100 | break; |
1101 | } | |
1102 | } | |
1103 | DBG("Finally dying..."); | |
1104 | } | |
6d45c11a PMF |
1105 | |
1106 | destroy_traces(); | |
1107 | ||
1108 | ustcomm_fini_app(&ustcomm_app); | |
97d9b88b | 1109 | } |
97d9b88b | 1110 | |
775c8a3f | 1111 | void ust_potential_exec(void) |
c396a841 PMF |
1112 | { |
1113 | trace_mark(ust, potential_exec, MARK_NOARGS); | |
1114 | ||
775c8a3f PMF |
1115 | DBG("test"); |
1116 | ||
c396a841 PMF |
1117 | keepalive(); |
1118 | } | |
1119 | ||
1e2944cb PMF |
1120 | /* Notify ust that there was a fork. This needs to be called inside |
1121 | * the new process, anytime a process whose memory is not shared with | |
1122 | * the parent is created. If this function is not called, the events | |
1123 | * of the new process will not be collected. | |
616ed36a PMF |
1124 | * |
1125 | * Signals should be disabled before the fork and reenabled only after | |
1126 | * this call in order to guarantee tracing is not started before ust_fork() | |
1127 | * sanitizes the new process. | |
1e2944cb PMF |
1128 | */ |
1129 | ||
616ed36a | 1130 | static void ust_fork(void) |
1e2944cb | 1131 | { |
99b72dc0 PMF |
1132 | struct blocked_consumer *bc; |
1133 | struct blocked_consumer *deletable_bc = NULL; | |
1134 | int result; | |
1135 | ||
1e2944cb PMF |
1136 | DBG("ust: forking"); |
1137 | ltt_trace_stop("auto"); | |
1138 | ltt_trace_destroy("auto"); | |
99b72dc0 PMF |
1139 | /* Delete all active connections */ |
1140 | ustcomm_close_all_connections(&ustcomm_app.server); | |
1141 | ||
1142 | /* Delete all blocked consumers */ | |
1143 | list_for_each_entry(bc, &blocked_consumers, list) { | |
d9ce395d PMF |
1144 | close(bc->fd_producer); |
1145 | close(bc->fd_consumer); | |
99b72dc0 PMF |
1146 | free(deletable_bc); |
1147 | deletable_bc = bc; | |
1148 | list_del(&bc->list); | |
1149 | } | |
1150 | ||
1e2944cb PMF |
1151 | have_listener = 0; |
1152 | create_listener(); | |
99b72dc0 PMF |
1153 | init_socket(); |
1154 | ltt_trace_setup("auto"); | |
1155 | result = ltt_trace_set_type("auto", "ustrelay"); | |
1156 | if(result < 0) { | |
1157 | ERR("ltt_trace_set_type failed"); | |
036db133 | 1158 | return; |
99b72dc0 PMF |
1159 | } |
1160 | ||
1161 | ltt_trace_alloc("auto"); | |
1162 | ltt_trace_start("auto"); | |
ad45e833 | 1163 | inform_consumer_daemon("auto"); |
1e2944cb PMF |
1164 | } |
1165 | ||
616ed36a PMF |
1166 | void ust_before_fork(ust_fork_info_t *fork_info) |
1167 | { | |
1168 | /* Disable signals. This is to avoid that the child | |
1169 | * intervenes before it is properly setup for tracing. It is | |
1170 | * safer to disable all signals, because then we know we are not | |
1171 | * breaking anything by restoring the original mask. | |
1172 | */ | |
1173 | sigset_t all_sigs; | |
1174 | int result; | |
1175 | ||
1176 | /* FIXME: | |
1177 | - only do this if tracing is active | |
1178 | */ | |
1179 | ||
1180 | /* Disable signals */ | |
1181 | sigfillset(&all_sigs); | |
1182 | result = sigprocmask(SIG_BLOCK, &all_sigs, &fork_info->orig_sigs); | |
1183 | if(result == -1) { | |
1184 | PERROR("sigprocmask"); | |
1185 | return; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | /* Don't call this function directly in a traced program */ | |
1190 | static void ust_after_fork_common(ust_fork_info_t *fork_info) | |
1191 | { | |
1192 | int result; | |
1193 | sigset_t orig_sigs; | |
1194 | ||
1195 | /* Restore signals */ | |
1196 | result = sigprocmask(SIG_SETMASK, &fork_info->orig_sigs, NULL); | |
1197 | if(result == -1) { | |
1198 | PERROR("sigprocmask"); | |
1199 | return; | |
1200 | } | |
1201 | } | |
1202 | ||
1203 | void ust_after_fork_parent(ust_fork_info_t *fork_info) | |
1204 | { | |
1205 | /* Reenable signals */ | |
1206 | ust_after_fork_common(fork_info); | |
1207 | } | |
1208 | ||
1209 | void ust_after_fork_child(ust_fork_info_t *fork_info) | |
1210 | { | |
1211 | /* First sanitize the child */ | |
1212 | ust_fork(); | |
1213 | ||
1214 | /* Then reenable interrupts */ | |
1215 | ust_after_fork_common(fork_info); | |
1216 | } | |
1217 |