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 | 19 | #include <stdio.h> |
909bc43f | 20 | #include <stdlib.h> |
68c1021b PMF |
21 | #include <stdint.h> |
22 | #include <signal.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/socket.h> | |
25 | #include <sys/un.h> | |
a584bc4e | 26 | #include <fcntl.h> |
3a7b90de | 27 | #include <poll.h> |
ef290fca | 28 | #include <regex.h> |
b102c2b0 | 29 | #include <urcu/uatomic_arch.h> |
fbd8191b | 30 | |
93d0f2ea | 31 | #include <ust/marker.h> |
616ed36a | 32 | #include <ust/tracectl.h> |
c93858f1 | 33 | #include "tracer.h" |
6af64c43 | 34 | #include "usterr.h" |
d0b5f2b9 | 35 | #include "ustcomm.h" |
b73a4c47 | 36 | #include "buffers.h" |
9160b4e4 | 37 | #include "marker-control.h" |
fbd8191b | 38 | |
68c1021b PMF |
39 | #define USTSIGNAL SIGIO |
40 | ||
98963de4 PMF |
41 | #define MAX_MSG_SIZE (100) |
42 | #define MSG_NOTIF 1 | |
43 | #define MSG_REGISTER_NOTIF 2 | |
44 | ||
a584bc4e PMF |
45 | char consumer_stack[10000]; |
46 | ||
ed1317e7 PMF |
47 | /* This should only be accessed by the constructor, before the creation |
48 | * of the listener, and then only by the listener. | |
49 | */ | |
50 | s64 pidunique = -1LL; | |
51 | ||
3a7b90de PMF |
52 | struct list_head blocked_consumers = LIST_HEAD_INIT(blocked_consumers); |
53 | ||
d0b5f2b9 PMF |
54 | static struct ustcomm_app ustcomm_app; |
55 | ||
68c1021b PMF |
56 | struct tracecmd { /* no padding */ |
57 | uint32_t size; | |
58 | uint16_t command; | |
59 | }; | |
60 | ||
f293009f PMF |
61 | /* volatile because shared between the listener and the main thread */ |
62 | volatile sig_atomic_t buffers_to_export = 0; | |
63 | ||
98963de4 PMF |
64 | struct trctl_msg { |
65 | /* size: the size of all the fields except size itself */ | |
66 | uint32_t size; | |
67 | uint16_t type; | |
68 | /* Only the necessary part of the payload is transferred. It | |
69 | * may even be none of it. | |
70 | */ | |
71 | char payload[94]; | |
72 | }; | |
68c1021b | 73 | |
a584bc4e PMF |
74 | struct consumer_channel { |
75 | int fd; | |
76 | struct ltt_channel_struct *chan; | |
77 | }; | |
78 | ||
3a7b90de PMF |
79 | struct blocked_consumer { |
80 | int fd_consumer; | |
81 | int fd_producer; | |
82 | int tmp_poll_idx; | |
83 | ||
84 | /* args to ustcomm_send_reply */ | |
85 | struct ustcomm_server server; | |
86 | struct ustcomm_source src; | |
87 | ||
b73a4c47 | 88 | /* args to ust_buffers_get_subbuf */ |
b5b073e2 | 89 | struct ust_buffer *buf; |
3a7b90de PMF |
90 | |
91 | struct list_head list; | |
92 | }; | |
93 | ||
ed1317e7 PMF |
94 | static long long make_pidunique(void) |
95 | { | |
96 | s64 retval; | |
97 | struct timeval tv; | |
98 | ||
99 | gettimeofday(&tv, NULL); | |
100 | ||
101 | retval = tv.tv_sec; | |
102 | retval <<= 32; | |
103 | retval |= tv.tv_usec; | |
104 | ||
105 | return retval; | |
106 | } | |
107 | ||
52c51a47 | 108 | static void print_markers(FILE *fp) |
fbd8191b PMF |
109 | { |
110 | struct marker_iter iter; | |
111 | ||
d0b5f2b9 | 112 | lock_markers(); |
fbd8191b PMF |
113 | marker_iter_reset(&iter); |
114 | marker_iter_start(&iter); | |
115 | ||
116 | while(iter.marker) { | |
3ea1e2fc | 117 | 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 |
118 | marker_iter_next(&iter); |
119 | } | |
d0b5f2b9 | 120 | unlock_markers(); |
fbd8191b PMF |
121 | } |
122 | ||
4440ebcb | 123 | static int init_socket(void); |
68c1021b | 124 | |
98963de4 PMF |
125 | int fd_notif = -1; |
126 | void notif_cb(void) | |
127 | { | |
128 | int result; | |
129 | struct trctl_msg msg; | |
130 | ||
131 | /* FIXME: fd_notif should probably be protected by a spinlock */ | |
132 | ||
133 | if(fd_notif == -1) | |
134 | return; | |
135 | ||
136 | msg.type = MSG_NOTIF; | |
137 | msg.size = sizeof(msg.type); | |
138 | ||
139 | /* FIXME: don't block here */ | |
140 | result = write(fd_notif, &msg, msg.size+sizeof(msg.size)); | |
141 | if(result == -1) { | |
142 | PERROR("write"); | |
143 | return; | |
144 | } | |
145 | } | |
146 | ||
ad45e833 PMF |
147 | /* Ask the daemon to collect a trace called trace_name and being |
148 | * produced by this pid. | |
149 | * | |
150 | * The trace must be at least allocated. (It can also be started.) | |
151 | * This is because _ltt_trace_find is used. | |
152 | */ | |
153 | ||
154 | static void inform_consumer_daemon(const char *trace_name) | |
d0b5f2b9 | 155 | { |
204141ee | 156 | int i,j; |
b73a4c47 | 157 | struct ust_trace *trace; |
ad45e833 PMF |
158 | pid_t pid = getpid(); |
159 | int result; | |
160 | ||
161 | ltt_lock_traces(); | |
162 | ||
163 | trace = _ltt_trace_find(trace_name); | |
164 | if(trace == NULL) { | |
165 | WARN("inform_consumer_daemon: could not find trace \"%s\"; it is probably already destroyed", trace_name); | |
166 | goto finish; | |
167 | } | |
168 | ||
169 | for(i=0; i < trace->nr_channels; i++) { | |
204141ee PMF |
170 | /* iterate on all cpus */ |
171 | for(j=0; j<trace->channels[i].n_cpus; j++) { | |
172 | char *buf; | |
173 | asprintf(&buf, "%s_%d", trace->channels[i].channel_name, j); | |
174 | result = ustcomm_request_consumer(pid, buf); | |
175 | if(result == -1) { | |
176 | WARN("Failed to request collection for channel %s. Is the daemon available?", trace->channels[i].channel_name); | |
177 | /* continue even if fail */ | |
178 | } | |
179 | free(buf); | |
180 | buffers_to_export++; | |
ad45e833 PMF |
181 | } |
182 | } | |
183 | ||
184 | finish: | |
185 | ltt_unlock_traces(); | |
d0b5f2b9 | 186 | } |
fbd8191b | 187 | |
3a7b90de PMF |
188 | void process_blocked_consumers(void) |
189 | { | |
190 | int n_fds = 0; | |
191 | struct pollfd *fds; | |
192 | struct blocked_consumer *bc; | |
193 | int idx = 0; | |
194 | char inbuf; | |
195 | int result; | |
196 | ||
197 | list_for_each_entry(bc, &blocked_consumers, list) { | |
198 | n_fds++; | |
199 | } | |
200 | ||
201 | fds = (struct pollfd *) malloc(n_fds * sizeof(struct pollfd)); | |
202 | if(fds == NULL) { | |
203 | ERR("malloc returned NULL"); | |
204 | return; | |
205 | } | |
206 | ||
207 | list_for_each_entry(bc, &blocked_consumers, list) { | |
208 | fds[idx].fd = bc->fd_producer; | |
209 | fds[idx].events = POLLIN; | |
210 | bc->tmp_poll_idx = idx; | |
211 | idx++; | |
212 | } | |
213 | ||
69ba0156 PMF |
214 | while((result = poll(fds, n_fds, 0)) == -1 && errno == EINTR) |
215 | /* nothing */; | |
3a7b90de PMF |
216 | if(result == -1) { |
217 | PERROR("poll"); | |
872037bb | 218 | return; |
3a7b90de PMF |
219 | } |
220 | ||
221 | list_for_each_entry(bc, &blocked_consumers, list) { | |
222 | if(fds[bc->tmp_poll_idx].revents) { | |
223 | long consumed_old = 0; | |
224 | char *reply; | |
225 | ||
226 | result = read(bc->fd_producer, &inbuf, 1); | |
227 | if(result == -1) { | |
228 | PERROR("read"); | |
229 | continue; | |
230 | } | |
231 | if(result == 0) { | |
78cc99db | 232 | int res; |
3a7b90de PMF |
233 | DBG("PRODUCER END"); |
234 | ||
78cc99db PMF |
235 | res = close(bc->fd_producer); |
236 | if(res == -1) { | |
237 | PERROR("close"); | |
238 | } | |
3a7b90de | 239 | |
769d0157 | 240 | list_del(&bc->list); |
3a7b90de PMF |
241 | |
242 | result = ustcomm_send_reply(&bc->server, "END", &bc->src); | |
243 | if(result < 0) { | |
244 | ERR("ustcomm_send_reply failed"); | |
245 | continue; | |
246 | } | |
247 | ||
248 | continue; | |
249 | } | |
250 | ||
b73a4c47 | 251 | result = ust_buffers_get_subbuf(bc->buf, &consumed_old); |
3a7b90de PMF |
252 | if(result == -EAGAIN) { |
253 | WARN("missed buffer?"); | |
254 | continue; | |
255 | } | |
256 | else if(result < 0) { | |
b73a4c47 | 257 | DBG("ust_buffers_get_subbuf: error: %s", strerror(-result)); |
3a7b90de PMF |
258 | } |
259 | asprintf(&reply, "%s %ld", "OK", consumed_old); | |
260 | result = ustcomm_send_reply(&bc->server, reply, &bc->src); | |
261 | if(result < 0) { | |
262 | ERR("ustcomm_send_reply failed"); | |
263 | free(reply); | |
264 | continue; | |
265 | } | |
266 | free(reply); | |
267 | ||
769d0157 | 268 | list_del(&bc->list); |
3a7b90de PMF |
269 | } |
270 | } | |
271 | ||
272 | } | |
273 | ||
204141ee PMF |
274 | void seperate_channel_cpu(const char *channel_and_cpu, char **channel, int *cpu) |
275 | { | |
276 | const char *sep; | |
277 | ||
278 | sep = rindex(channel_and_cpu, '_'); | |
279 | if(sep == NULL) { | |
280 | *cpu = -1; | |
281 | sep = channel_and_cpu + strlen(channel_and_cpu); | |
282 | } | |
283 | else { | |
284 | *cpu = atoi(sep+1); | |
285 | } | |
286 | ||
287 | asprintf(channel, "%.*s", (int)(sep-channel_and_cpu), channel_and_cpu); | |
288 | } | |
289 | ||
290 | static int do_cmd_get_shmid(const char *recvbuf, struct ustcomm_source *src) | |
291 | { | |
292 | int retval = 0; | |
b73a4c47 | 293 | struct ust_trace *trace; |
204141ee PMF |
294 | char trace_name[] = "auto"; |
295 | int i; | |
296 | char *channel_and_cpu; | |
297 | int found = 0; | |
298 | int result; | |
299 | char *ch_name; | |
300 | int ch_cpu; | |
301 | ||
302 | DBG("get_shmid"); | |
303 | ||
304 | channel_and_cpu = nth_token(recvbuf, 1); | |
305 | if(channel_and_cpu == NULL) { | |
27e84572 | 306 | ERR("cannot parse channel"); |
204141ee PMF |
307 | goto end; |
308 | } | |
309 | ||
310 | seperate_channel_cpu(channel_and_cpu, &ch_name, &ch_cpu); | |
311 | if(ch_cpu == -1) { | |
27e84572 | 312 | ERR("problem parsing channel name"); |
204141ee PMF |
313 | goto free_short_chan_name; |
314 | } | |
315 | ||
316 | ltt_lock_traces(); | |
317 | trace = _ltt_trace_find(trace_name); | |
318 | ltt_unlock_traces(); | |
319 | ||
320 | if(trace == NULL) { | |
321 | ERR("cannot find trace!"); | |
322 | retval = -1; | |
323 | goto free_short_chan_name; | |
324 | } | |
325 | ||
326 | for(i=0; i<trace->nr_channels; i++) { | |
327 | struct ust_channel *channel = &trace->channels[i]; | |
328 | struct ust_buffer *buf = channel->buf[ch_cpu]; | |
329 | ||
330 | if(!strcmp(trace->channels[i].channel_name, ch_name)) { | |
331 | char *reply; | |
332 | ||
333 | // DBG("the shmid for the requested channel is %d", buf->shmid); | |
334 | // DBG("the shmid for its buffer structure is %d", channel->buf_struct_shmids); | |
335 | asprintf(&reply, "%d %d", buf->shmid, channel->buf_struct_shmids[ch_cpu]); | |
336 | ||
337 | result = ustcomm_send_reply(&ustcomm_app.server, reply, src); | |
338 | if(result) { | |
27e84572 | 339 | ERR("ustcomm_send_reply failed"); |
204141ee PMF |
340 | free(reply); |
341 | retval = -1; | |
342 | goto free_short_chan_name; | |
343 | } | |
344 | ||
345 | free(reply); | |
346 | ||
347 | found = 1; | |
348 | break; | |
349 | } | |
350 | } | |
351 | ||
d5adede0 | 352 | if(!found) { |
27e84572 | 353 | ERR("channel not found (%s)", channel_and_cpu); |
204141ee PMF |
354 | } |
355 | ||
356 | free_short_chan_name: | |
357 | free(ch_name); | |
358 | ||
359 | end: | |
360 | return retval; | |
361 | } | |
362 | ||
363 | static int do_cmd_get_n_subbufs(const char *recvbuf, struct ustcomm_source *src) | |
364 | { | |
365 | int retval = 0; | |
b73a4c47 | 366 | struct ust_trace *trace; |
204141ee PMF |
367 | char trace_name[] = "auto"; |
368 | int i; | |
369 | char *channel_and_cpu; | |
370 | int found = 0; | |
371 | int result; | |
372 | char *ch_name; | |
373 | int ch_cpu; | |
374 | ||
375 | DBG("get_n_subbufs"); | |
376 | ||
377 | channel_and_cpu = nth_token(recvbuf, 1); | |
378 | if(channel_and_cpu == NULL) { | |
27e84572 | 379 | ERR("cannot parse channel"); |
204141ee PMF |
380 | goto end; |
381 | } | |
382 | ||
383 | seperate_channel_cpu(channel_and_cpu, &ch_name, &ch_cpu); | |
384 | if(ch_cpu == -1) { | |
27e84572 | 385 | ERR("problem parsing channel name"); |
204141ee PMF |
386 | goto free_short_chan_name; |
387 | } | |
388 | ||
389 | ltt_lock_traces(); | |
390 | trace = _ltt_trace_find(trace_name); | |
391 | ltt_unlock_traces(); | |
392 | ||
393 | if(trace == NULL) { | |
394 | ERR("cannot find trace!"); | |
395 | retval = -1; | |
396 | goto free_short_chan_name; | |
397 | } | |
398 | ||
399 | for(i=0; i<trace->nr_channels; i++) { | |
400 | struct ust_channel *channel = &trace->channels[i]; | |
401 | ||
402 | if(!strcmp(trace->channels[i].channel_name, ch_name)) { | |
403 | char *reply; | |
404 | ||
405 | DBG("the n_subbufs for the requested channel is %d", channel->subbuf_cnt); | |
406 | asprintf(&reply, "%d", channel->subbuf_cnt); | |
407 | ||
408 | result = ustcomm_send_reply(&ustcomm_app.server, reply, src); | |
409 | if(result) { | |
27e84572 | 410 | ERR("ustcomm_send_reply failed"); |
204141ee PMF |
411 | free(reply); |
412 | retval = -1; | |
413 | goto free_short_chan_name; | |
414 | } | |
415 | ||
416 | free(reply); | |
417 | found = 1; | |
418 | break; | |
419 | } | |
420 | } | |
421 | if(found == 0) { | |
27e84572 | 422 | ERR("unable to find channel"); |
204141ee PMF |
423 | } |
424 | ||
425 | free_short_chan_name: | |
426 | free(ch_name); | |
427 | ||
428 | end: | |
429 | return retval; | |
430 | } | |
431 | ||
432 | static int do_cmd_get_subbuf_size(const char *recvbuf, struct ustcomm_source *src) | |
433 | { | |
434 | int retval = 0; | |
b73a4c47 | 435 | struct ust_trace *trace; |
204141ee PMF |
436 | char trace_name[] = "auto"; |
437 | int i; | |
438 | char *channel_and_cpu; | |
439 | int found = 0; | |
440 | int result; | |
441 | char *ch_name; | |
442 | int ch_cpu; | |
443 | ||
444 | DBG("get_subbuf_size"); | |
445 | ||
446 | channel_and_cpu = nth_token(recvbuf, 1); | |
447 | if(channel_and_cpu == NULL) { | |
27e84572 | 448 | ERR("cannot parse channel"); |
204141ee PMF |
449 | goto end; |
450 | } | |
451 | ||
452 | seperate_channel_cpu(channel_and_cpu, &ch_name, &ch_cpu); | |
453 | if(ch_cpu == -1) { | |
27e84572 | 454 | ERR("problem parsing channel name"); |
204141ee PMF |
455 | goto free_short_chan_name; |
456 | } | |
457 | ||
458 | ltt_lock_traces(); | |
459 | trace = _ltt_trace_find(trace_name); | |
460 | ltt_unlock_traces(); | |
461 | ||
462 | if(trace == NULL) { | |
463 | ERR("cannot find trace!"); | |
464 | retval = -1; | |
465 | goto free_short_chan_name; | |
466 | } | |
467 | ||
468 | for(i=0; i<trace->nr_channels; i++) { | |
469 | struct ust_channel *channel = &trace->channels[i]; | |
470 | ||
471 | if(!strcmp(trace->channels[i].channel_name, ch_name)) { | |
472 | char *reply; | |
473 | ||
474 | DBG("the subbuf_size for the requested channel is %zd", channel->subbuf_size); | |
475 | asprintf(&reply, "%zd", channel->subbuf_size); | |
476 | ||
477 | result = ustcomm_send_reply(&ustcomm_app.server, reply, src); | |
478 | if(result) { | |
27e84572 | 479 | ERR("ustcomm_send_reply failed"); |
204141ee PMF |
480 | free(reply); |
481 | retval = -1; | |
482 | goto free_short_chan_name; | |
483 | } | |
484 | ||
485 | free(reply); | |
486 | found = 1; | |
487 | break; | |
488 | } | |
489 | } | |
490 | if(found == 0) { | |
27e84572 | 491 | ERR("unable to find channel"); |
204141ee PMF |
492 | } |
493 | ||
494 | free_short_chan_name: | |
495 | free(ch_name); | |
496 | ||
497 | end: | |
498 | return retval; | |
499 | } | |
500 | ||
e43efba9 | 501 | static unsigned int poweroftwo(unsigned int x) |
763f41e5 DS |
502 | { |
503 | unsigned int power2 = 1; | |
504 | unsigned int hardcoded = 2147483648; /* FIX max 2^31 */ | |
505 | ||
506 | if (x < 2) | |
507 | return 2; | |
508 | ||
509 | while (power2 < x && power2 < hardcoded) | |
510 | power2 *= 2; | |
511 | ||
512 | return power2; | |
513 | } | |
514 | ||
515 | static int do_cmd_set_subbuf_size(const char *recvbuf, struct ustcomm_source *src) | |
516 | { | |
517 | char *channel_slash_size; | |
518 | char ch_name[256]=""; | |
519 | unsigned int size, power; | |
520 | int retval = 0; | |
521 | struct ust_trace *trace; | |
522 | char trace_name[] = "auto"; | |
523 | int i; | |
524 | int found = 0; | |
525 | ||
526 | DBG("set_subbuf_size"); | |
527 | ||
528 | channel_slash_size = nth_token(recvbuf, 1); | |
529 | sscanf(channel_slash_size, "%255[^/]/%u", ch_name, &size); | |
530 | ||
531 | if(ch_name == NULL) { | |
532 | ERR("cannot parse channel"); | |
533 | goto end; | |
534 | } | |
535 | ||
536 | power = poweroftwo(size); | |
537 | if (power != size) | |
538 | WARN("using the next 2^n = %u\n", power); | |
539 | ||
540 | ltt_lock_traces(); | |
541 | trace = _ltt_trace_find_setup(trace_name); | |
542 | if(trace == NULL) { | |
543 | ERR("cannot find trace!"); | |
763f41e5 DS |
544 | retval = -1; |
545 | goto end; | |
546 | } | |
547 | ||
548 | for(i = 0; i < trace->nr_channels; i++) { | |
549 | struct ust_channel *channel = &trace->channels[i]; | |
550 | ||
551 | if(!strcmp(trace->channels[i].channel_name, ch_name)) { | |
552 | ||
553 | channel->subbuf_size = power; | |
554 | DBG("the set_subbuf_size for the requested channel is %zd", channel->subbuf_size); | |
555 | ||
556 | found = 1; | |
557 | break; | |
558 | } | |
559 | } | |
560 | if(found == 0) { | |
561 | ERR("unable to find channel"); | |
562 | } | |
563 | ||
763f41e5 | 564 | end: |
86dd0ebc | 565 | ltt_unlock_traces(); |
763f41e5 DS |
566 | return retval; |
567 | } | |
568 | ||
569 | static int do_cmd_set_subbuf_num(const char *recvbuf, struct ustcomm_source *src) | |
570 | { | |
571 | char *channel_slash_num; | |
572 | char ch_name[256]=""; | |
573 | unsigned int num; | |
574 | int retval = 0; | |
575 | struct ust_trace *trace; | |
576 | char trace_name[] = "auto"; | |
577 | int i; | |
578 | int found = 0; | |
579 | ||
580 | DBG("set_subbuf_num"); | |
581 | ||
582 | channel_slash_num = nth_token(recvbuf, 1); | |
583 | sscanf(channel_slash_num, "%255[^/]/%u", ch_name, &num); | |
584 | ||
585 | if(ch_name == NULL) { | |
586 | ERR("cannot parse channel"); | |
587 | goto end; | |
588 | } | |
589 | if (num < 2) { | |
590 | ERR("subbuffer count should be greater than 2"); | |
591 | goto end; | |
592 | } | |
593 | ||
594 | ltt_lock_traces(); | |
595 | trace = _ltt_trace_find_setup(trace_name); | |
596 | if(trace == NULL) { | |
597 | ERR("cannot find trace!"); | |
763f41e5 DS |
598 | retval = -1; |
599 | goto end; | |
600 | } | |
601 | ||
602 | for(i = 0; i < trace->nr_channels; i++) { | |
603 | struct ust_channel *channel = &trace->channels[i]; | |
604 | ||
605 | if(!strcmp(trace->channels[i].channel_name, ch_name)) { | |
606 | ||
607 | channel->subbuf_cnt = num; | |
608 | DBG("the set_subbuf_cnt for the requested channel is %zd", channel->subbuf_cnt); | |
609 | ||
610 | found = 1; | |
611 | break; | |
612 | } | |
613 | } | |
614 | if(found == 0) { | |
615 | ERR("unable to find channel"); | |
616 | } | |
617 | ||
763f41e5 | 618 | end: |
86dd0ebc | 619 | ltt_unlock_traces(); |
763f41e5 DS |
620 | return retval; |
621 | } | |
622 | ||
204141ee PMF |
623 | static int do_cmd_get_subbuffer(const char *recvbuf, struct ustcomm_source *src) |
624 | { | |
625 | int retval = 0; | |
b73a4c47 | 626 | struct ust_trace *trace; |
204141ee PMF |
627 | char trace_name[] = "auto"; |
628 | int i; | |
629 | char *channel_and_cpu; | |
630 | int found = 0; | |
631 | char *ch_name; | |
632 | int ch_cpu; | |
633 | ||
634 | DBG("get_subbuf"); | |
635 | ||
636 | channel_and_cpu = nth_token(recvbuf, 1); | |
637 | if(channel_and_cpu == NULL) { | |
27e84572 | 638 | ERR("cannot parse channel"); |
204141ee PMF |
639 | goto end; |
640 | } | |
641 | ||
642 | seperate_channel_cpu(channel_and_cpu, &ch_name, &ch_cpu); | |
643 | if(ch_cpu == -1) { | |
27e84572 | 644 | ERR("problem parsing channel name"); |
204141ee PMF |
645 | goto free_short_chan_name; |
646 | } | |
647 | ||
648 | ltt_lock_traces(); | |
649 | trace = _ltt_trace_find(trace_name); | |
204141ee PMF |
650 | |
651 | if(trace == NULL) { | |
2ddb81a8 PMF |
652 | int result; |
653 | ||
753e1b51 | 654 | DBG("Cannot find trace. It was likely destroyed by the user."); |
86dd0ebc | 655 | result = ustcomm_send_reply(&ustcomm_app.server, "NOTFOUND", src); |
2ddb81a8 PMF |
656 | if(result) { |
657 | ERR("ustcomm_send_reply failed"); | |
2ddb81a8 | 658 | retval = -1; |
86dd0ebc | 659 | goto unlock_traces; |
2ddb81a8 PMF |
660 | } |
661 | ||
86dd0ebc | 662 | goto unlock_traces; |
204141ee PMF |
663 | } |
664 | ||
665 | for(i=0; i<trace->nr_channels; i++) { | |
666 | struct ust_channel *channel = &trace->channels[i]; | |
667 | ||
668 | if(!strcmp(trace->channels[i].channel_name, ch_name)) { | |
669 | struct ust_buffer *buf = channel->buf[ch_cpu]; | |
670 | struct blocked_consumer *bc; | |
671 | ||
672 | found = 1; | |
673 | ||
674 | bc = (struct blocked_consumer *) malloc(sizeof(struct blocked_consumer)); | |
675 | if(bc == NULL) { | |
676 | ERR("malloc returned NULL"); | |
86dd0ebc | 677 | goto unlock_traces; |
204141ee PMF |
678 | } |
679 | bc->fd_consumer = src->fd; | |
680 | bc->fd_producer = buf->data_ready_fd_read; | |
681 | bc->buf = buf; | |
682 | bc->src = *src; | |
683 | bc->server = ustcomm_app.server; | |
684 | ||
685 | list_add(&bc->list, &blocked_consumers); | |
686 | ||
d5adede0 PMF |
687 | /* Being here is the proof the daemon has mapped the buffer in its |
688 | * memory. We may now decrement buffers_to_export. | |
689 | */ | |
b102c2b0 | 690 | if(uatomic_read(&buf->consumed) == 0) { |
d5adede0 PMF |
691 | DBG("decrementing buffers_to_export"); |
692 | buffers_to_export--; | |
693 | } | |
694 | ||
204141ee PMF |
695 | break; |
696 | } | |
697 | } | |
698 | if(found == 0) { | |
27e84572 | 699 | ERR("unable to find channel"); |
204141ee PMF |
700 | } |
701 | ||
86dd0ebc PMF |
702 | unlock_traces: |
703 | ltt_unlock_traces(); | |
704 | ||
204141ee PMF |
705 | free_short_chan_name: |
706 | free(ch_name); | |
707 | ||
708 | end: | |
709 | return retval; | |
710 | } | |
711 | ||
712 | static int do_cmd_put_subbuffer(const char *recvbuf, struct ustcomm_source *src) | |
713 | { | |
714 | int retval = 0; | |
b73a4c47 | 715 | struct ust_trace *trace; |
204141ee PMF |
716 | char trace_name[] = "auto"; |
717 | int i; | |
718 | char *channel_and_cpu; | |
719 | int found = 0; | |
720 | int result; | |
721 | char *ch_name; | |
722 | int ch_cpu; | |
723 | long consumed_old; | |
724 | char *consumed_old_str; | |
725 | char *endptr; | |
2ddb81a8 | 726 | char *reply = NULL; |
204141ee PMF |
727 | |
728 | DBG("put_subbuf"); | |
729 | ||
730 | channel_and_cpu = strdup_malloc(nth_token(recvbuf, 1)); | |
731 | if(channel_and_cpu == NULL) { | |
27e84572 | 732 | ERR("cannot parse channel"); |
204141ee PMF |
733 | retval = -1; |
734 | goto end; | |
735 | } | |
736 | ||
737 | consumed_old_str = strdup_malloc(nth_token(recvbuf, 2)); | |
738 | if(consumed_old_str == NULL) { | |
27e84572 | 739 | ERR("cannot parse consumed_old"); |
204141ee PMF |
740 | retval = -1; |
741 | goto free_channel_and_cpu; | |
742 | } | |
743 | consumed_old = strtol(consumed_old_str, &endptr, 10); | |
744 | if(*endptr != '\0') { | |
27e84572 | 745 | ERR("invalid value for consumed_old"); |
204141ee PMF |
746 | retval = -1; |
747 | goto free_consumed_old_str; | |
748 | } | |
749 | ||
750 | seperate_channel_cpu(channel_and_cpu, &ch_name, &ch_cpu); | |
751 | if(ch_cpu == -1) { | |
27e84572 | 752 | ERR("problem parsing channel name"); |
204141ee PMF |
753 | retval = -1; |
754 | goto free_short_chan_name; | |
755 | } | |
756 | ||
757 | ltt_lock_traces(); | |
758 | trace = _ltt_trace_find(trace_name); | |
204141ee PMF |
759 | |
760 | if(trace == NULL) { | |
753e1b51 | 761 | DBG("Cannot find trace. It was likely destroyed by the user."); |
86dd0ebc | 762 | result = ustcomm_send_reply(&ustcomm_app.server, "NOTFOUND", src); |
2ddb81a8 PMF |
763 | if(result) { |
764 | ERR("ustcomm_send_reply failed"); | |
2ddb81a8 | 765 | retval = -1; |
86dd0ebc | 766 | goto unlock_traces; |
2ddb81a8 PMF |
767 | } |
768 | ||
86dd0ebc | 769 | goto unlock_traces; |
204141ee PMF |
770 | } |
771 | ||
772 | for(i=0; i<trace->nr_channels; i++) { | |
773 | struct ust_channel *channel = &trace->channels[i]; | |
774 | ||
775 | if(!strcmp(trace->channels[i].channel_name, ch_name)) { | |
776 | struct ust_buffer *buf = channel->buf[ch_cpu]; | |
204141ee PMF |
777 | |
778 | found = 1; | |
779 | ||
b73a4c47 | 780 | result = ust_buffers_put_subbuf(buf, consumed_old); |
204141ee | 781 | if(result < 0) { |
b73a4c47 | 782 | WARN("ust_buffers_put_subbuf: error (subbuf=%s)", channel_and_cpu); |
204141ee PMF |
783 | asprintf(&reply, "%s", "ERROR"); |
784 | } | |
785 | else { | |
b73a4c47 | 786 | DBG("ust_buffers_put_subbuf: success (subbuf=%s)", channel_and_cpu); |
204141ee PMF |
787 | asprintf(&reply, "%s", "OK"); |
788 | } | |
789 | ||
790 | result = ustcomm_send_reply(&ustcomm_app.server, reply, src); | |
791 | if(result) { | |
27e84572 | 792 | ERR("ustcomm_send_reply failed"); |
204141ee PMF |
793 | free(reply); |
794 | retval = -1; | |
86dd0ebc | 795 | goto unlock_traces; |
204141ee PMF |
796 | } |
797 | ||
798 | free(reply); | |
799 | break; | |
800 | } | |
801 | } | |
802 | if(found == 0) { | |
2ddb81a8 | 803 | ERR("unable to find channel"); |
204141ee PMF |
804 | } |
805 | ||
86dd0ebc PMF |
806 | unlock_traces: |
807 | ltt_unlock_traces(); | |
204141ee PMF |
808 | free_short_chan_name: |
809 | free(ch_name); | |
2ddb81a8 PMF |
810 | free_consumed_old_str: |
811 | free(consumed_old_str); | |
812 | free_channel_and_cpu: | |
813 | free(channel_and_cpu); | |
204141ee PMF |
814 | |
815 | end: | |
816 | return retval; | |
817 | } | |
818 | ||
fc253ce0 PMF |
819 | static void listener_cleanup(void *ptr) |
820 | { | |
821 | ustcomm_fini_app(&ustcomm_app, 0); | |
822 | } | |
823 | ||
872037bb | 824 | void *listener_main(void *p) |
98963de4 PMF |
825 | { |
826 | int result; | |
827 | ||
b0540e11 PMF |
828 | DBG("LISTENER"); |
829 | ||
fc253ce0 PMF |
830 | pthread_cleanup_push(listener_cleanup, NULL); |
831 | ||
98963de4 | 832 | for(;;) { |
aafb1650 PMF |
833 | char trace_name[] = "auto"; |
834 | char trace_type[] = "ustrelay"; | |
d0b5f2b9 PMF |
835 | char *recvbuf; |
836 | int len; | |
b02e31e5 | 837 | struct ustcomm_source src; |
98963de4 | 838 | |
3a7b90de PMF |
839 | process_blocked_consumers(); |
840 | ||
841 | result = ustcomm_app_recv_message(&ustcomm_app, &recvbuf, &src, 5); | |
842 | if(result < 0) { | |
d0b5f2b9 PMF |
843 | WARN("error in ustcomm_app_recv_message"); |
844 | continue; | |
845 | } | |
3a7b90de PMF |
846 | else if(result == 0) { |
847 | /* no message */ | |
848 | continue; | |
849 | } | |
98963de4 | 850 | |
08230db7 | 851 | DBG("received a message! it's: %s", recvbuf); |
d0b5f2b9 | 852 | len = strlen(recvbuf); |
98963de4 | 853 | |
d0b5f2b9 | 854 | if(!strcmp(recvbuf, "print_markers")) { |
52c51a47 PMF |
855 | print_markers(stderr); |
856 | } | |
857 | else if(!strcmp(recvbuf, "list_markers")) { | |
858 | char *ptr; | |
859 | size_t size; | |
860 | FILE *fp; | |
861 | ||
862 | fp = open_memstream(&ptr, &size); | |
863 | print_markers(fp); | |
864 | fclose(fp); | |
865 | ||
866 | result = ustcomm_send_reply(&ustcomm_app.server, ptr, &src); | |
867 | ||
868 | free(ptr); | |
869 | } | |
870 | else if(!strcmp(recvbuf, "start")) { | |
871 | /* start is an operation that setups the trace, allocates it and starts it */ | |
872 | result = ltt_trace_setup(trace_name); | |
873 | if(result < 0) { | |
874 | ERR("ltt_trace_setup failed"); | |
872037bb | 875 | return (void *)1; |
52c51a47 PMF |
876 | } |
877 | ||
878 | result = ltt_trace_set_type(trace_name, trace_type); | |
879 | if(result < 0) { | |
880 | ERR("ltt_trace_set_type failed"); | |
872037bb | 881 | return (void *)1; |
52c51a47 PMF |
882 | } |
883 | ||
884 | result = ltt_trace_alloc(trace_name); | |
885 | if(result < 0) { | |
886 | ERR("ltt_trace_alloc failed"); | |
872037bb | 887 | return (void *)1; |
52c51a47 PMF |
888 | } |
889 | ||
ad45e833 | 890 | inform_consumer_daemon(trace_name); |
52c51a47 PMF |
891 | |
892 | result = ltt_trace_start(trace_name); | |
893 | if(result < 0) { | |
894 | ERR("ltt_trace_start failed"); | |
895 | continue; | |
896 | } | |
d0b5f2b9 PMF |
897 | } |
898 | else if(!strcmp(recvbuf, "trace_setup")) { | |
899 | DBG("trace setup"); | |
fbd8191b | 900 | |
d0b5f2b9 PMF |
901 | result = ltt_trace_setup(trace_name); |
902 | if(result < 0) { | |
903 | ERR("ltt_trace_setup failed"); | |
872037bb | 904 | return (void *)1; |
fbd8191b | 905 | } |
d0b5f2b9 PMF |
906 | |
907 | result = ltt_trace_set_type(trace_name, trace_type); | |
908 | if(result < 0) { | |
909 | ERR("ltt_trace_set_type failed"); | |
872037bb | 910 | return (void *)1; |
fbd8191b | 911 | } |
d0b5f2b9 PMF |
912 | } |
913 | else if(!strcmp(recvbuf, "trace_alloc")) { | |
914 | DBG("trace alloc"); | |
915 | ||
916 | result = ltt_trace_alloc(trace_name); | |
917 | if(result < 0) { | |
918 | ERR("ltt_trace_alloc failed"); | |
872037bb | 919 | return (void *)1; |
fbd8191b | 920 | } |
763f41e5 | 921 | inform_consumer_daemon(trace_name); |
d0b5f2b9 | 922 | } |
62ec620f PMF |
923 | else if(!strcmp(recvbuf, "trace_create")) { |
924 | DBG("trace create"); | |
925 | ||
926 | result = ltt_trace_setup(trace_name); | |
927 | if(result < 0) { | |
928 | ERR("ltt_trace_setup failed"); | |
929 | return (void *)1; | |
930 | } | |
931 | ||
932 | result = ltt_trace_set_type(trace_name, trace_type); | |
933 | if(result < 0) { | |
934 | ERR("ltt_trace_set_type failed"); | |
935 | return (void *)1; | |
936 | } | |
763f41e5 DS |
937 | } |
938 | else if(!strcmp(recvbuf, "trace_start")) { | |
939 | DBG("trace start"); | |
62ec620f PMF |
940 | |
941 | result = ltt_trace_alloc(trace_name); | |
942 | if(result < 0) { | |
943 | ERR("ltt_trace_alloc failed"); | |
944 | return (void *)1; | |
945 | } | |
763f41e5 DS |
946 | if(!result) { |
947 | inform_consumer_daemon(trace_name); | |
948 | } | |
d0b5f2b9 PMF |
949 | |
950 | result = ltt_trace_start(trace_name); | |
951 | if(result < 0) { | |
952 | ERR("ltt_trace_start failed"); | |
953 | continue; | |
fbd8191b | 954 | } |
d0b5f2b9 PMF |
955 | } |
956 | else if(!strcmp(recvbuf, "trace_stop")) { | |
957 | DBG("trace stop"); | |
958 | ||
959 | result = ltt_trace_stop(trace_name); | |
960 | if(result < 0) { | |
961 | ERR("ltt_trace_stop failed"); | |
872037bb | 962 | return (void *)1; |
aafb1650 | 963 | } |
d0b5f2b9 PMF |
964 | } |
965 | else if(!strcmp(recvbuf, "trace_destroy")) { | |
aafb1650 | 966 | |
d0b5f2b9 | 967 | DBG("trace destroy"); |
aafb1650 | 968 | |
31d392f1 | 969 | result = ltt_trace_destroy(trace_name, 0); |
d0b5f2b9 PMF |
970 | if(result < 0) { |
971 | ERR("ltt_trace_destroy failed"); | |
872037bb | 972 | return (void *)1; |
fbd8191b | 973 | } |
98963de4 | 974 | } |
b02e31e5 | 975 | else if(nth_token_is(recvbuf, "get_shmid", 0) == 1) { |
204141ee | 976 | do_cmd_get_shmid(recvbuf, &src); |
811e4b93 PMF |
977 | } |
978 | else if(nth_token_is(recvbuf, "get_n_subbufs", 0) == 1) { | |
204141ee | 979 | do_cmd_get_n_subbufs(recvbuf, &src); |
811e4b93 PMF |
980 | } |
981 | else if(nth_token_is(recvbuf, "get_subbuf_size", 0) == 1) { | |
204141ee | 982 | do_cmd_get_subbuf_size(recvbuf, &src); |
3847c3ba | 983 | } |
b02e31e5 PMF |
984 | else if(nth_token_is(recvbuf, "load_probe_lib", 0) == 1) { |
985 | char *libfile; | |
986 | ||
987 | libfile = nth_token(recvbuf, 1); | |
988 | ||
989 | DBG("load_probe_lib loading %s", libfile); | |
204141ee PMF |
990 | |
991 | free(libfile); | |
b02e31e5 | 992 | } |
688760ef | 993 | else if(nth_token_is(recvbuf, "get_subbuffer", 0) == 1) { |
204141ee | 994 | do_cmd_get_subbuffer(recvbuf, &src); |
688760ef PMF |
995 | } |
996 | else if(nth_token_is(recvbuf, "put_subbuffer", 0) == 1) { | |
204141ee | 997 | do_cmd_put_subbuffer(recvbuf, &src); |
688760ef | 998 | } |
763f41e5 DS |
999 | else if(nth_token_is(recvbuf, "set_subbuf_size", 0) == 1) { |
1000 | do_cmd_set_subbuf_size(recvbuf, &src); | |
1001 | } | |
1002 | else if(nth_token_is(recvbuf, "set_subbuf_num", 0) == 1) { | |
1003 | do_cmd_set_subbuf_num(recvbuf, &src); | |
1004 | } | |
52c51a47 PMF |
1005 | else if(nth_token_is(recvbuf, "enable_marker", 0) == 1) { |
1006 | char *channel_slash_name = nth_token(recvbuf, 1); | |
1007 | char channel_name[256]=""; | |
1008 | char marker_name[256]=""; | |
52c51a47 PMF |
1009 | |
1010 | result = sscanf(channel_slash_name, "%255[^/]/%255s", channel_name, marker_name); | |
1011 | ||
1012 | if(channel_name == NULL || marker_name == NULL) { | |
1013 | WARN("invalid marker name"); | |
1014 | goto next_cmd; | |
1015 | } | |
52c51a47 PMF |
1016 | |
1017 | result = ltt_marker_connect(channel_name, marker_name, "default"); | |
1018 | if(result < 0) { | |
1019 | WARN("could not enable marker; channel=%s, name=%s", channel_name, marker_name); | |
1020 | } | |
1021 | } | |
1022 | else if(nth_token_is(recvbuf, "disable_marker", 0) == 1) { | |
1023 | char *channel_slash_name = nth_token(recvbuf, 1); | |
1024 | char *marker_name; | |
1025 | char *channel_name; | |
52c51a47 PMF |
1026 | |
1027 | result = sscanf(channel_slash_name, "%a[^/]/%as", &channel_name, &marker_name); | |
1028 | ||
1029 | if(marker_name == NULL) { | |
1030 | } | |
52c51a47 PMF |
1031 | |
1032 | result = ltt_marker_disconnect(channel_name, marker_name, "default"); | |
1033 | if(result < 0) { | |
1034 | WARN("could not disable marker; channel=%s, name=%s", channel_name, marker_name); | |
1035 | } | |
1036 | } | |
ed1317e7 PMF |
1037 | else if(nth_token_is(recvbuf, "get_pidunique", 0) == 1) { |
1038 | char *reply; | |
1039 | ||
1040 | asprintf(&reply, "%lld", pidunique); | |
1041 | ||
1042 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
1043 | if(result) { | |
1044 | ERR("listener: get_pidunique: ustcomm_send_reply failed"); | |
1045 | goto next_cmd; | |
1046 | } | |
1047 | ||
1048 | free(reply); | |
1049 | } | |
3a7b90de | 1050 | // else if(nth_token_is(recvbuf, "get_notifications", 0) == 1) { |
b73a4c47 | 1051 | // struct ust_trace *trace; |
3a7b90de PMF |
1052 | // char trace_name[] = "auto"; |
1053 | // int i; | |
1054 | // char *channel_name; | |
1055 | // | |
1056 | // DBG("get_notifications"); | |
1057 | // | |
1058 | // channel_name = strdup_malloc(nth_token(recvbuf, 1)); | |
1059 | // if(channel_name == NULL) { | |
1060 | // ERR("put_subbuf_size: cannot parse channel"); | |
1061 | // goto next_cmd; | |
1062 | // } | |
1063 | // | |
1064 | // ltt_lock_traces(); | |
1065 | // trace = _ltt_trace_find(trace_name); | |
1066 | // ltt_unlock_traces(); | |
1067 | // | |
1068 | // if(trace == NULL) { | |
63fe14e5 | 1069 | // ERR("cannot find trace!"); |
872037bb | 1070 | // return (void *)1; |
3a7b90de PMF |
1071 | // } |
1072 | // | |
1073 | // for(i=0; i<trace->nr_channels; i++) { | |
1074 | // struct rchan *rchan = trace->channels[i].trans_channel_data; | |
1075 | // int fd; | |
1076 | // | |
1077 | // if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
1078 | // struct rchan_buf *rbuf = rchan->buf; | |
1079 | // struct ltt_channel_buf_struct *lttbuf = trace->channels[i].buf; | |
1080 | // | |
1081 | // result = fd = ustcomm_app_detach_client(&ustcomm_app, &src); | |
1082 | // if(result == -1) { | |
1083 | // ERR("ustcomm_app_detach_client failed"); | |
1084 | // goto next_cmd; | |
1085 | // } | |
1086 | // | |
1087 | // lttbuf->wake_consumer_arg = (void *) fd; | |
1088 | // | |
1089 | // smp_wmb(); | |
1090 | // | |
1091 | // lttbuf->call_wake_consumer = 1; | |
1092 | // | |
1093 | // break; | |
1094 | // } | |
1095 | // } | |
1096 | // | |
1097 | // free(channel_name); | |
1098 | // } | |
688760ef PMF |
1099 | else { |
1100 | ERR("unable to parse message: %s", recvbuf); | |
1101 | } | |
d0b5f2b9 | 1102 | |
811e4b93 | 1103 | next_cmd: |
d0b5f2b9 | 1104 | free(recvbuf); |
98963de4 | 1105 | } |
fc253ce0 PMF |
1106 | |
1107 | pthread_cleanup_pop(1); | |
98963de4 PMF |
1108 | } |
1109 | ||
cd03ff7f PMF |
1110 | /* These should only be accessed in the parent thread, |
1111 | * not the listener. | |
1112 | */ | |
ce45335c | 1113 | static volatile sig_atomic_t have_listener = 0; |
fc253ce0 | 1114 | static pthread_t listener_thread; |
4440ebcb | 1115 | |
98963de4 PMF |
1116 | void create_listener(void) |
1117 | { | |
c5fdc888 | 1118 | int result; |
98963de4 | 1119 | |
c5fdc888 PMF |
1120 | if(have_listener) { |
1121 | WARN("not creating listener because we already had one"); | |
4440ebcb | 1122 | return; |
c5fdc888 | 1123 | } |
4440ebcb | 1124 | |
cd03ff7f | 1125 | result = pthread_create(&listener_thread, NULL, listener_main, NULL); |
98963de4 | 1126 | if(result == -1) { |
cd03ff7f | 1127 | PERROR("pthread_create"); |
98963de4 | 1128 | } |
4440ebcb PMF |
1129 | |
1130 | have_listener = 1; | |
98963de4 PMF |
1131 | } |
1132 | ||
98963de4 | 1133 | static int init_socket(void) |
68c1021b | 1134 | { |
d0b5f2b9 | 1135 | return ustcomm_init_app(getpid(), &ustcomm_app); |
68c1021b PMF |
1136 | } |
1137 | ||
5de74e51 PMF |
1138 | #define AUTOPROBE_DISABLED 0 |
1139 | #define AUTOPROBE_ENABLE_ALL 1 | |
1140 | #define AUTOPROBE_ENABLE_REGEX 2 | |
1141 | static int autoprobe_method = AUTOPROBE_DISABLED; | |
1142 | static regex_t autoprobe_regex; | |
ef290fca | 1143 | |
20b37a31 | 1144 | static void auto_probe_connect(struct marker *m) |
68c1021b PMF |
1145 | { |
1146 | int result; | |
1147 | ||
5de74e51 PMF |
1148 | char* concat_name = NULL; |
1149 | const char *probe_name = "default"; | |
ef290fca | 1150 | |
5de74e51 | 1151 | if(autoprobe_method == AUTOPROBE_DISABLED) { |
ef290fca PMF |
1152 | return; |
1153 | } | |
5de74e51 PMF |
1154 | else if(autoprobe_method == AUTOPROBE_ENABLE_REGEX) { |
1155 | result = asprintf(&concat_name, "%s/%s", m->channel, m->name); | |
1156 | if(result == -1) { | |
1157 | ERR("auto_probe_connect: asprintf failed (marker %s/%s)", | |
1158 | m->channel, m->name); | |
1159 | return; | |
1160 | } | |
1161 | if (regexec(&autoprobe_regex, concat_name, 0, NULL, 0)) { | |
1162 | free(concat_name); | |
1163 | return; | |
1164 | } | |
1165 | free(concat_name); | |
ef290fca PMF |
1166 | } |
1167 | ||
5de74e51 | 1168 | result = ltt_marker_connect(m->channel, m->name, probe_name); |
acbf228b PMF |
1169 | if(result && result != -EEXIST) |
1170 | ERR("ltt_marker_connect (marker = %s/%s, errno = %d)", m->channel, m->name, -result); | |
20b37a31 | 1171 | |
3ea1e2fc | 1172 | DBG("auto connected marker %s (addr: %p) %s to probe default", m->channel, m, m->name); |
ef290fca | 1173 | |
20b37a31 PMF |
1174 | } |
1175 | ||
c1083aa8 | 1176 | static void __attribute__((constructor)) init() |
20b37a31 PMF |
1177 | { |
1178 | int result; | |
5de74e51 | 1179 | char* autoprobe_val = NULL; |
20b37a31 | 1180 | |
ed1317e7 PMF |
1181 | /* Assign the pidunique, to be able to differentiate the processes with same |
1182 | * pid, (before and after an exec). | |
1183 | */ | |
1184 | pidunique = make_pidunique(); | |
1185 | ||
5de74e51 | 1186 | DBG("Tracectl constructor"); |
20b37a31 | 1187 | |
3847c3ba PMF |
1188 | result = init_socket(); |
1189 | if(result == -1) { | |
1190 | ERR("init_socket error"); | |
1191 | return; | |
1192 | } | |
2944a629 PMF |
1193 | |
1194 | create_listener(); | |
68c1021b | 1195 | |
5de74e51 PMF |
1196 | autoprobe_val = getenv("UST_AUTOPROBE"); |
1197 | if(autoprobe_val) { | |
4440ebcb PMF |
1198 | struct marker_iter iter; |
1199 | ||
08230db7 | 1200 | DBG("Autoprobe enabled."); |
4440ebcb PMF |
1201 | |
1202 | /* Ensure markers are initialized */ | |
1203 | //init_markers(); | |
1204 | ||
1205 | /* Ensure marker control is initialized, for the probe */ | |
1206 | init_marker_control(); | |
1207 | ||
1208 | /* first, set the callback that will connect the | |
1209 | * probe on new markers | |
1210 | */ | |
5de74e51 PMF |
1211 | if(autoprobe_val[0] == '/') { |
1212 | result = regcomp(&autoprobe_regex, autoprobe_val+1, 0); | |
1213 | if (result) { | |
1214 | char regexerr[150]; | |
1215 | ||
1216 | regerror(result, &autoprobe_regex, regexerr, sizeof(regexerr)); | |
1217 | ERR("cannot parse regex %s (%s), will ignore UST_AUTOPROBE", autoprobe_val, regexerr); | |
1218 | /* don't crash the application just for this */ | |
1219 | } | |
1220 | else { | |
1221 | autoprobe_method = AUTOPROBE_ENABLE_REGEX; | |
1222 | } | |
ef290fca | 1223 | } |
5de74e51 PMF |
1224 | else { |
1225 | /* just enable all instrumentation */ | |
1226 | autoprobe_method = AUTOPROBE_ENABLE_ALL; | |
1227 | } | |
1228 | ||
1229 | marker_set_new_marker_cb(auto_probe_connect); | |
1230 | ||
4440ebcb PMF |
1231 | /* Now, connect the probes that were already registered. */ |
1232 | marker_iter_reset(&iter); | |
1233 | marker_iter_start(&iter); | |
1234 | ||
08230db7 | 1235 | DBG("now iterating on markers already registered"); |
4440ebcb | 1236 | while(iter.marker) { |
08230db7 | 1237 | DBG("now iterating on marker %s", iter.marker->name); |
4440ebcb PMF |
1238 | auto_probe_connect(iter.marker); |
1239 | marker_iter_next(&iter); | |
1240 | } | |
1241 | } | |
1242 | ||
4db647c5 PMF |
1243 | if(getenv("UST_TRACE")) { |
1244 | char trace_name[] = "auto"; | |
1245 | char trace_type[] = "ustrelay"; | |
1246 | ||
1247 | DBG("starting early tracing"); | |
1248 | ||
1249 | /* Ensure marker control is initialized */ | |
1250 | init_marker_control(); | |
1251 | ||
4db647c5 PMF |
1252 | /* Ensure markers are initialized */ |
1253 | init_markers(); | |
1254 | ||
e17571a5 PMF |
1255 | /* Ensure buffers are initialized, for the transport to be available. |
1256 | * We are about to set a trace type and it will fail without this. | |
1257 | */ | |
1258 | init_ustrelay_transport(); | |
1259 | ||
027ffc9d PMF |
1260 | /* FIXME: When starting early tracing (here), depending on the |
1261 | * order of constructors, it is very well possible some marker | |
1262 | * sections are not yet registered. Because of this, some | |
1263 | * channels may not be registered. Yet, we are about to ask the | |
1264 | * daemon to collect the channels. Channels which are not yet | |
1265 | * registered will not be collected. | |
1266 | * | |
1267 | * Currently, in LTTng, there is no way to add a channel after | |
1268 | * trace start. The reason for this is that it induces complex | |
1269 | * concurrency issues on the trace structures, which can only | |
1270 | * be resolved using RCU. This has not been done yet. As a | |
1271 | * workaround, we are forcing the registration of the "ust" | |
1272 | * channel here. This is the only channel (apart from metadata) | |
1273 | * that can be reliably used in early tracing. | |
1274 | * | |
1275 | * Non-early tracing does not have this problem and can use | |
1276 | * arbitrary channel names. | |
1277 | */ | |
20b37a31 | 1278 | ltt_channels_register("ust"); |
4db647c5 PMF |
1279 | |
1280 | result = ltt_trace_setup(trace_name); | |
1281 | if(result < 0) { | |
1282 | ERR("ltt_trace_setup failed"); | |
1283 | return; | |
1284 | } | |
1285 | ||
1286 | result = ltt_trace_set_type(trace_name, trace_type); | |
1287 | if(result < 0) { | |
1288 | ERR("ltt_trace_set_type failed"); | |
1289 | return; | |
1290 | } | |
1291 | ||
1292 | result = ltt_trace_alloc(trace_name); | |
1293 | if(result < 0) { | |
1294 | ERR("ltt_trace_alloc failed"); | |
1295 | return; | |
1296 | } | |
1297 | ||
1298 | result = ltt_trace_start(trace_name); | |
1299 | if(result < 0) { | |
1300 | ERR("ltt_trace_start failed"); | |
1301 | return; | |
1302 | } | |
60e57148 PMF |
1303 | |
1304 | /* Do this after the trace is started in order to avoid creating confusion | |
1305 | * if the trace fails to start. */ | |
1306 | inform_consumer_daemon(trace_name); | |
4db647c5 PMF |
1307 | } |
1308 | ||
68c1021b PMF |
1309 | |
1310 | return; | |
1311 | ||
1312 | /* should decrementally destroy stuff if error */ | |
1313 | ||
1314 | } | |
1315 | ||
1316 | /* This is only called if we terminate normally, not with an unhandled signal, | |
6d45c11a PMF |
1317 | * so we cannot rely on it. However, for now, LTTV requires that the header of |
1318 | * the last sub-buffer contain a valid end time for the trace. This is done | |
1319 | * automatically only when the trace is properly stopped. | |
1320 | * | |
1321 | * If the traced program crashed, it is always possible to manually add the | |
1322 | * right value in the header, or to open the trace in text mode. | |
1323 | * | |
1324 | * FIXME: Fix LTTV so it doesn't need this. | |
1325 | */ | |
68c1021b | 1326 | |
6d45c11a | 1327 | static void destroy_traces(void) |
68c1021b | 1328 | { |
6d45c11a | 1329 | int result; |
a584bc4e PMF |
1330 | |
1331 | /* if trace running, finish it */ | |
1332 | ||
6d45c11a | 1333 | DBG("destructor stopping traces"); |
a584bc4e | 1334 | |
6d45c11a PMF |
1335 | result = ltt_trace_stop("auto"); |
1336 | if(result == -1) { | |
1337 | ERR("ltt_trace_stop error"); | |
1338 | } | |
1339 | ||
31d392f1 | 1340 | result = ltt_trace_destroy("auto", 0); |
6d45c11a PMF |
1341 | if(result == -1) { |
1342 | ERR("ltt_trace_destroy error"); | |
1343 | } | |
68c1021b | 1344 | } |
1e2944cb | 1345 | |
97d9b88b PMF |
1346 | static int trace_recording(void) |
1347 | { | |
1348 | int retval = 0; | |
b73a4c47 | 1349 | struct ust_trace *trace; |
97d9b88b PMF |
1350 | |
1351 | ltt_lock_traces(); | |
1352 | ||
1353 | list_for_each_entry(trace, <t_traces.head, list) { | |
1354 | if(trace->active) { | |
1355 | retval = 1; | |
1356 | break; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | ltt_unlock_traces(); | |
1361 | ||
1362 | return retval; | |
1363 | } | |
1364 | ||
f293009f | 1365 | #if 0 |
97d9b88b PMF |
1366 | static int have_consumer(void) |
1367 | { | |
1368 | return !list_empty(&blocked_consumers); | |
1369 | } | |
f293009f | 1370 | #endif |
97d9b88b | 1371 | |
f293009f | 1372 | int restarting_usleep(useconds_t usecs) |
97d9b88b PMF |
1373 | { |
1374 | struct timespec tv; | |
1375 | int result; | |
1376 | ||
f293009f PMF |
1377 | tv.tv_sec = 0; |
1378 | tv.tv_nsec = usecs * 1000; | |
97d9b88b PMF |
1379 | |
1380 | do { | |
1381 | result = nanosleep(&tv, &tv); | |
1382 | } while(result == -1 && errno == EINTR); | |
1383 | ||
1384 | return result; | |
1385 | } | |
1386 | ||
fc253ce0 PMF |
1387 | static void stop_listener() |
1388 | { | |
1389 | int result; | |
1390 | ||
1391 | result = pthread_cancel(listener_thread); | |
1392 | if(result == -1) { | |
1393 | PERROR("pthread_cancel"); | |
1394 | } | |
1395 | result = pthread_join(listener_thread, NULL); | |
1396 | if(result == -1) { | |
1397 | PERROR("pthread_join"); | |
1398 | } | |
1399 | } | |
1400 | ||
f293009f PMF |
1401 | /* This destructor keeps the process alive for a few seconds in order |
1402 | * to leave time to ustd to connect to its buffers. This is necessary | |
1403 | * for programs whose execution is very short. It is also useful in all | |
1404 | * programs when tracing is started close to the end of the program | |
1405 | * execution. | |
1406 | * | |
1407 | * FIXME: For now, this only works for the first trace created in a | |
1408 | * process. | |
1409 | */ | |
1410 | ||
97d9b88b PMF |
1411 | static void __attribute__((destructor)) keepalive() |
1412 | { | |
f293009f | 1413 | if(trace_recording() && buffers_to_export) { |
c472cce0 | 1414 | int total = 0; |
f293009f PMF |
1415 | DBG("Keeping process alive for consumer daemon..."); |
1416 | while(buffers_to_export) { | |
1417 | const int interv = 200000; | |
c472cce0 | 1418 | restarting_usleep(interv); |
f293009f PMF |
1419 | total += interv; |
1420 | ||
1421 | if(total >= 3000000) { | |
c472cce0 | 1422 | WARN("non-consumed buffers remaining after wait limit; not waiting anymore"); |
f293009f PMF |
1423 | break; |
1424 | } | |
1425 | } | |
1426 | DBG("Finally dying..."); | |
1427 | } | |
6d45c11a PMF |
1428 | |
1429 | destroy_traces(); | |
1430 | ||
fc253ce0 PMF |
1431 | /* Ask the listener to stop and clean up. */ |
1432 | stop_listener(); | |
97d9b88b | 1433 | } |
97d9b88b | 1434 | |
775c8a3f | 1435 | void ust_potential_exec(void) |
c396a841 PMF |
1436 | { |
1437 | trace_mark(ust, potential_exec, MARK_NOARGS); | |
1438 | ||
775c8a3f PMF |
1439 | DBG("test"); |
1440 | ||
c396a841 PMF |
1441 | keepalive(); |
1442 | } | |
1443 | ||
1e2944cb PMF |
1444 | /* Notify ust that there was a fork. This needs to be called inside |
1445 | * the new process, anytime a process whose memory is not shared with | |
1446 | * the parent is created. If this function is not called, the events | |
1447 | * of the new process will not be collected. | |
616ed36a PMF |
1448 | * |
1449 | * Signals should be disabled before the fork and reenabled only after | |
1450 | * this call in order to guarantee tracing is not started before ust_fork() | |
1451 | * sanitizes the new process. | |
1e2944cb PMF |
1452 | */ |
1453 | ||
616ed36a | 1454 | static void ust_fork(void) |
1e2944cb | 1455 | { |
99b72dc0 PMF |
1456 | struct blocked_consumer *bc; |
1457 | struct blocked_consumer *deletable_bc = NULL; | |
1458 | int result; | |
1459 | ||
31d392f1 | 1460 | /* FIXME: technically, the locks could have been taken before the fork */ |
1e2944cb | 1461 | DBG("ust: forking"); |
73850001 PMF |
1462 | |
1463 | /* break lock if necessary */ | |
1464 | ltt_unlock_traces(); | |
1465 | ||
1e2944cb | 1466 | ltt_trace_stop("auto"); |
31d392f1 | 1467 | ltt_trace_destroy("auto", 1); |
99b72dc0 PMF |
1468 | /* Delete all active connections */ |
1469 | ustcomm_close_all_connections(&ustcomm_app.server); | |
1470 | ||
1471 | /* Delete all blocked consumers */ | |
1472 | list_for_each_entry(bc, &blocked_consumers, list) { | |
2c1ccefa PMF |
1473 | result = close(bc->fd_producer); |
1474 | if(result == -1) { | |
1475 | PERROR("close"); | |
1476 | } | |
99b72dc0 PMF |
1477 | free(deletable_bc); |
1478 | deletable_bc = bc; | |
1479 | list_del(&bc->list); | |
1480 | } | |
1481 | ||
2a79ceeb PMF |
1482 | /* free app, keeping socket file */ |
1483 | ustcomm_fini_app(&ustcomm_app, 1); | |
393bc391 | 1484 | |
cedc0155 | 1485 | buffers_to_export = 0; |
1e2944cb | 1486 | have_listener = 0; |
99b72dc0 | 1487 | init_socket(); |
9fb49d0e | 1488 | create_listener(); |
99b72dc0 PMF |
1489 | ltt_trace_setup("auto"); |
1490 | result = ltt_trace_set_type("auto", "ustrelay"); | |
1491 | if(result < 0) { | |
1492 | ERR("ltt_trace_set_type failed"); | |
036db133 | 1493 | return; |
99b72dc0 PMF |
1494 | } |
1495 | ||
1496 | ltt_trace_alloc("auto"); | |
1497 | ltt_trace_start("auto"); | |
ad45e833 | 1498 | inform_consumer_daemon("auto"); |
1e2944cb PMF |
1499 | } |
1500 | ||
616ed36a PMF |
1501 | void ust_before_fork(ust_fork_info_t *fork_info) |
1502 | { | |
1503 | /* Disable signals. This is to avoid that the child | |
1504 | * intervenes before it is properly setup for tracing. It is | |
1505 | * safer to disable all signals, because then we know we are not | |
1506 | * breaking anything by restoring the original mask. | |
1507 | */ | |
1508 | sigset_t all_sigs; | |
1509 | int result; | |
1510 | ||
1511 | /* FIXME: | |
1512 | - only do this if tracing is active | |
1513 | */ | |
1514 | ||
1515 | /* Disable signals */ | |
1516 | sigfillset(&all_sigs); | |
1517 | result = sigprocmask(SIG_BLOCK, &all_sigs, &fork_info->orig_sigs); | |
1518 | if(result == -1) { | |
1519 | PERROR("sigprocmask"); | |
1520 | return; | |
1521 | } | |
1522 | } | |
1523 | ||
1524 | /* Don't call this function directly in a traced program */ | |
1525 | static void ust_after_fork_common(ust_fork_info_t *fork_info) | |
1526 | { | |
1527 | int result; | |
616ed36a PMF |
1528 | |
1529 | /* Restore signals */ | |
1530 | result = sigprocmask(SIG_SETMASK, &fork_info->orig_sigs, NULL); | |
1531 | if(result == -1) { | |
1532 | PERROR("sigprocmask"); | |
1533 | return; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | void ust_after_fork_parent(ust_fork_info_t *fork_info) | |
1538 | { | |
1539 | /* Reenable signals */ | |
1540 | ust_after_fork_common(fork_info); | |
1541 | } | |
1542 | ||
1543 | void ust_after_fork_child(ust_fork_info_t *fork_info) | |
1544 | { | |
1545 | /* First sanitize the child */ | |
1546 | ust_fork(); | |
1547 | ||
1548 | /* Then reenable interrupts */ | |
1549 | ust_after_fork_common(fork_info); | |
1550 | } | |
1551 |