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> |
fbd8191b | 28 | |
26cc7017 PMF |
29 | #include <urcu.h> |
30 | ||
fbd8191b | 31 | #include "marker.h" |
a584bc4e | 32 | #include "tracer.h" |
d0b5f2b9 PMF |
33 | #include "localerr.h" |
34 | #include "ustcomm.h" | |
46ef48cd | 35 | #include "relay.h" /* FIXME: remove */ |
9160b4e4 | 36 | #include "marker-control.h" |
fbd8191b | 37 | |
b02e31e5 | 38 | //#define USE_CLONE |
3847c3ba | 39 | |
68c1021b PMF |
40 | #define USTSIGNAL SIGIO |
41 | ||
98963de4 PMF |
42 | #define MAX_MSG_SIZE (100) |
43 | #define MSG_NOTIF 1 | |
44 | #define MSG_REGISTER_NOTIF 2 | |
45 | ||
a584bc4e PMF |
46 | char consumer_stack[10000]; |
47 | ||
3a7b90de PMF |
48 | struct list_head blocked_consumers = LIST_HEAD_INIT(blocked_consumers); |
49 | ||
d0b5f2b9 PMF |
50 | static struct ustcomm_app ustcomm_app; |
51 | ||
68c1021b PMF |
52 | struct tracecmd { /* no padding */ |
53 | uint32_t size; | |
54 | uint16_t command; | |
55 | }; | |
56 | ||
98963de4 PMF |
57 | //struct listener_arg { |
58 | // int pipe_fd; | |
59 | //}; | |
60 | ||
61 | struct trctl_msg { | |
62 | /* size: the size of all the fields except size itself */ | |
63 | uint32_t size; | |
64 | uint16_t type; | |
65 | /* Only the necessary part of the payload is transferred. It | |
66 | * may even be none of it. | |
67 | */ | |
68 | char payload[94]; | |
69 | }; | |
68c1021b | 70 | |
a584bc4e PMF |
71 | struct consumer_channel { |
72 | int fd; | |
73 | struct ltt_channel_struct *chan; | |
74 | }; | |
75 | ||
3a7b90de PMF |
76 | struct blocked_consumer { |
77 | int fd_consumer; | |
78 | int fd_producer; | |
79 | int tmp_poll_idx; | |
80 | ||
81 | /* args to ustcomm_send_reply */ | |
82 | struct ustcomm_server server; | |
83 | struct ustcomm_source src; | |
84 | ||
85 | /* args to ltt_do_get_subbuf */ | |
86 | struct rchan_buf *rbuf; | |
87 | struct ltt_channel_buf_struct *lttbuf; | |
88 | ||
89 | struct list_head list; | |
90 | }; | |
91 | ||
52c51a47 | 92 | static void print_markers(FILE *fp) |
fbd8191b PMF |
93 | { |
94 | struct marker_iter iter; | |
95 | ||
d0b5f2b9 | 96 | lock_markers(); |
fbd8191b PMF |
97 | marker_iter_reset(&iter); |
98 | marker_iter_start(&iter); | |
99 | ||
100 | while(iter.marker) { | |
52c51a47 | 101 | fprintf(fp, "marker: %s_%s %d \"%s\"\n", iter.marker->channel, iter.marker->name, (int)imv_read(iter.marker->state), iter.marker->format); |
fbd8191b PMF |
102 | marker_iter_next(&iter); |
103 | } | |
d0b5f2b9 | 104 | unlock_markers(); |
fbd8191b PMF |
105 | } |
106 | ||
68c1021b PMF |
107 | void do_command(struct tracecmd *cmd) |
108 | { | |
109 | } | |
110 | ||
26cc7017 PMF |
111 | /* This needs to be called whenever a new thread is created. It notifies |
112 | * liburcu of the new thread. | |
113 | */ | |
114 | ||
115 | void ust_register_thread(void) | |
68c1021b | 116 | { |
26cc7017 | 117 | rcu_register_thread(); |
68c1021b PMF |
118 | } |
119 | ||
98963de4 PMF |
120 | int fd_notif = -1; |
121 | void notif_cb(void) | |
122 | { | |
123 | int result; | |
124 | struct trctl_msg msg; | |
125 | ||
126 | /* FIXME: fd_notif should probably be protected by a spinlock */ | |
127 | ||
128 | if(fd_notif == -1) | |
129 | return; | |
130 | ||
131 | msg.type = MSG_NOTIF; | |
132 | msg.size = sizeof(msg.type); | |
133 | ||
134 | /* FIXME: don't block here */ | |
135 | result = write(fd_notif, &msg, msg.size+sizeof(msg.size)); | |
136 | if(result == -1) { | |
137 | PERROR("write"); | |
138 | return; | |
139 | } | |
140 | } | |
141 | ||
872037bb | 142 | static void inform_consumer_daemon(void) |
d0b5f2b9 | 143 | { |
3847c3ba PMF |
144 | ustcomm_request_consumer(getpid(), "metadata"); |
145 | ustcomm_request_consumer(getpid(), "ust"); | |
d0b5f2b9 | 146 | } |
fbd8191b | 147 | |
3a7b90de PMF |
148 | void process_blocked_consumers(void) |
149 | { | |
150 | int n_fds = 0; | |
151 | struct pollfd *fds; | |
152 | struct blocked_consumer *bc; | |
153 | int idx = 0; | |
154 | char inbuf; | |
155 | int result; | |
156 | ||
157 | list_for_each_entry(bc, &blocked_consumers, list) { | |
158 | n_fds++; | |
159 | } | |
160 | ||
161 | fds = (struct pollfd *) malloc(n_fds * sizeof(struct pollfd)); | |
162 | if(fds == NULL) { | |
163 | ERR("malloc returned NULL"); | |
164 | return; | |
165 | } | |
166 | ||
167 | list_for_each_entry(bc, &blocked_consumers, list) { | |
168 | fds[idx].fd = bc->fd_producer; | |
169 | fds[idx].events = POLLIN; | |
170 | bc->tmp_poll_idx = idx; | |
171 | idx++; | |
172 | } | |
173 | ||
69ba0156 PMF |
174 | while((result = poll(fds, n_fds, 0)) == -1 && errno == EINTR) |
175 | /* nothing */; | |
3a7b90de PMF |
176 | if(result == -1) { |
177 | PERROR("poll"); | |
872037bb | 178 | return; |
3a7b90de PMF |
179 | } |
180 | ||
181 | list_for_each_entry(bc, &blocked_consumers, list) { | |
182 | if(fds[bc->tmp_poll_idx].revents) { | |
183 | long consumed_old = 0; | |
184 | char *reply; | |
185 | ||
186 | result = read(bc->fd_producer, &inbuf, 1); | |
187 | if(result == -1) { | |
188 | PERROR("read"); | |
189 | continue; | |
190 | } | |
191 | if(result == 0) { | |
192 | DBG("PRODUCER END"); | |
193 | ||
194 | close(bc->fd_producer); | |
195 | ||
769d0157 | 196 | list_del(&bc->list); |
3a7b90de PMF |
197 | |
198 | result = ustcomm_send_reply(&bc->server, "END", &bc->src); | |
199 | if(result < 0) { | |
200 | ERR("ustcomm_send_reply failed"); | |
201 | continue; | |
202 | } | |
203 | ||
204 | continue; | |
205 | } | |
206 | ||
207 | result = ltt_do_get_subbuf(bc->rbuf, bc->lttbuf, &consumed_old); | |
208 | if(result == -EAGAIN) { | |
209 | WARN("missed buffer?"); | |
210 | continue; | |
211 | } | |
212 | else if(result < 0) { | |
213 | DBG("ltt_do_get_subbuf: error: %s", strerror(-result)); | |
214 | } | |
215 | asprintf(&reply, "%s %ld", "OK", consumed_old); | |
216 | result = ustcomm_send_reply(&bc->server, reply, &bc->src); | |
217 | if(result < 0) { | |
218 | ERR("ustcomm_send_reply failed"); | |
219 | free(reply); | |
220 | continue; | |
221 | } | |
222 | free(reply); | |
223 | ||
769d0157 | 224 | list_del(&bc->list); |
3a7b90de PMF |
225 | } |
226 | } | |
227 | ||
228 | } | |
229 | ||
872037bb | 230 | void *listener_main(void *p) |
98963de4 PMF |
231 | { |
232 | int result; | |
233 | ||
26cc7017 PMF |
234 | ust_register_thread(); |
235 | ||
b0540e11 PMF |
236 | DBG("LISTENER"); |
237 | ||
98963de4 | 238 | for(;;) { |
aafb1650 PMF |
239 | char trace_name[] = "auto"; |
240 | char trace_type[] = "ustrelay"; | |
d0b5f2b9 PMF |
241 | char *recvbuf; |
242 | int len; | |
b02e31e5 | 243 | struct ustcomm_source src; |
98963de4 | 244 | |
3a7b90de PMF |
245 | process_blocked_consumers(); |
246 | ||
247 | result = ustcomm_app_recv_message(&ustcomm_app, &recvbuf, &src, 5); | |
248 | if(result < 0) { | |
d0b5f2b9 PMF |
249 | WARN("error in ustcomm_app_recv_message"); |
250 | continue; | |
251 | } | |
3a7b90de PMF |
252 | else if(result == 0) { |
253 | /* no message */ | |
254 | continue; | |
255 | } | |
98963de4 | 256 | |
d0b5f2b9 PMF |
257 | DBG("received a message! it's: %s\n", recvbuf); |
258 | len = strlen(recvbuf); | |
98963de4 | 259 | |
d0b5f2b9 | 260 | if(!strcmp(recvbuf, "print_markers")) { |
52c51a47 PMF |
261 | print_markers(stderr); |
262 | } | |
263 | else if(!strcmp(recvbuf, "list_markers")) { | |
264 | char *ptr; | |
265 | size_t size; | |
266 | FILE *fp; | |
267 | ||
268 | fp = open_memstream(&ptr, &size); | |
269 | print_markers(fp); | |
270 | fclose(fp); | |
271 | ||
272 | result = ustcomm_send_reply(&ustcomm_app.server, ptr, &src); | |
273 | ||
274 | free(ptr); | |
275 | } | |
276 | else if(!strcmp(recvbuf, "start")) { | |
277 | /* start is an operation that setups the trace, allocates it and starts it */ | |
278 | result = ltt_trace_setup(trace_name); | |
279 | if(result < 0) { | |
280 | ERR("ltt_trace_setup failed"); | |
872037bb | 281 | return (void *)1; |
52c51a47 PMF |
282 | } |
283 | ||
284 | result = ltt_trace_set_type(trace_name, trace_type); | |
285 | if(result < 0) { | |
286 | ERR("ltt_trace_set_type failed"); | |
872037bb | 287 | return (void *)1; |
52c51a47 PMF |
288 | } |
289 | ||
290 | result = ltt_trace_alloc(trace_name); | |
291 | if(result < 0) { | |
292 | ERR("ltt_trace_alloc failed"); | |
872037bb | 293 | return (void *)1; |
52c51a47 PMF |
294 | } |
295 | ||
296 | inform_consumer_daemon(); | |
297 | ||
298 | result = ltt_trace_start(trace_name); | |
299 | if(result < 0) { | |
300 | ERR("ltt_trace_start failed"); | |
301 | continue; | |
302 | } | |
d0b5f2b9 PMF |
303 | } |
304 | else if(!strcmp(recvbuf, "trace_setup")) { | |
305 | DBG("trace setup"); | |
fbd8191b | 306 | |
d0b5f2b9 PMF |
307 | result = ltt_trace_setup(trace_name); |
308 | if(result < 0) { | |
309 | ERR("ltt_trace_setup failed"); | |
872037bb | 310 | return (void *)1; |
fbd8191b | 311 | } |
d0b5f2b9 PMF |
312 | |
313 | result = ltt_trace_set_type(trace_name, trace_type); | |
314 | if(result < 0) { | |
315 | ERR("ltt_trace_set_type failed"); | |
872037bb | 316 | return (void *)1; |
fbd8191b | 317 | } |
d0b5f2b9 PMF |
318 | } |
319 | else if(!strcmp(recvbuf, "trace_alloc")) { | |
320 | DBG("trace alloc"); | |
321 | ||
322 | result = ltt_trace_alloc(trace_name); | |
323 | if(result < 0) { | |
324 | ERR("ltt_trace_alloc failed"); | |
872037bb | 325 | return (void *)1; |
fbd8191b | 326 | } |
d0b5f2b9 PMF |
327 | } |
328 | else if(!strcmp(recvbuf, "trace_start")) { | |
329 | DBG("trace start"); | |
330 | ||
331 | result = ltt_trace_start(trace_name); | |
332 | if(result < 0) { | |
333 | ERR("ltt_trace_start failed"); | |
334 | continue; | |
fbd8191b | 335 | } |
d0b5f2b9 PMF |
336 | } |
337 | else if(!strcmp(recvbuf, "trace_stop")) { | |
338 | DBG("trace stop"); | |
339 | ||
340 | result = ltt_trace_stop(trace_name); | |
341 | if(result < 0) { | |
342 | ERR("ltt_trace_stop failed"); | |
872037bb | 343 | return (void *)1; |
aafb1650 | 344 | } |
d0b5f2b9 PMF |
345 | } |
346 | else if(!strcmp(recvbuf, "trace_destroy")) { | |
aafb1650 | 347 | |
d0b5f2b9 | 348 | DBG("trace destroy"); |
aafb1650 | 349 | |
d0b5f2b9 PMF |
350 | result = ltt_trace_destroy(trace_name); |
351 | if(result < 0) { | |
352 | ERR("ltt_trace_destroy failed"); | |
872037bb | 353 | return (void *)1; |
fbd8191b | 354 | } |
98963de4 | 355 | } |
b02e31e5 | 356 | else if(nth_token_is(recvbuf, "get_shmid", 0) == 1) { |
3847c3ba PMF |
357 | struct ltt_trace_struct *trace; |
358 | char trace_name[] = "auto"; | |
359 | int i; | |
811e4b93 | 360 | char *channel_name; |
3847c3ba PMF |
361 | |
362 | DBG("get_shmid"); | |
363 | ||
811e4b93 PMF |
364 | channel_name = nth_token(recvbuf, 1); |
365 | if(channel_name == NULL) { | |
366 | ERR("get_shmid: cannot parse channel"); | |
367 | goto next_cmd; | |
368 | } | |
369 | ||
3847c3ba PMF |
370 | ltt_lock_traces(); |
371 | trace = _ltt_trace_find(trace_name); | |
372 | ltt_unlock_traces(); | |
373 | ||
374 | if(trace == NULL) { | |
63fe14e5 | 375 | ERR("cannot find trace!"); |
872037bb | 376 | return (void *)1; |
3847c3ba PMF |
377 | } |
378 | ||
379 | for(i=0; i<trace->nr_channels; i++) { | |
380 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
381 | struct rchan_buf *rbuf = rchan->buf; | |
8cefc145 | 382 | struct ltt_channel_struct *ltt_channel = (struct ltt_channel_struct *)rchan->private_data; |
3847c3ba | 383 | |
811e4b93 PMF |
384 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { |
385 | char *reply; | |
386 | ||
387 | DBG("the shmid for the requested channel is %d", rbuf->shmid); | |
8cefc145 PMF |
388 | DBG("the shmid for its buffer structure is %d", ltt_channel->buf_shmid); |
389 | asprintf(&reply, "%d %d", rbuf->shmid, ltt_channel->buf_shmid); | |
811e4b93 PMF |
390 | |
391 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
392 | if(result) { | |
393 | ERR("listener: get_shmid: ustcomm_send_reply failed"); | |
394 | goto next_cmd; | |
395 | } | |
396 | ||
397 | free(reply); | |
398 | ||
399 | break; | |
400 | } | |
401 | } | |
402 | } | |
403 | else if(nth_token_is(recvbuf, "get_n_subbufs", 0) == 1) { | |
404 | struct ltt_trace_struct *trace; | |
405 | char trace_name[] = "auto"; | |
406 | int i; | |
407 | char *channel_name; | |
408 | ||
409 | DBG("get_n_subbufs"); | |
410 | ||
411 | channel_name = nth_token(recvbuf, 1); | |
412 | if(channel_name == NULL) { | |
413 | ERR("get_n_subbufs: cannot parse channel"); | |
414 | goto next_cmd; | |
415 | } | |
416 | ||
417 | ltt_lock_traces(); | |
418 | trace = _ltt_trace_find(trace_name); | |
419 | ltt_unlock_traces(); | |
420 | ||
421 | if(trace == NULL) { | |
63fe14e5 | 422 | ERR("cannot find trace!"); |
872037bb | 423 | return (void *)1; |
811e4b93 PMF |
424 | } |
425 | ||
426 | for(i=0; i<trace->nr_channels; i++) { | |
427 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
428 | ||
429 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
430 | char *reply; | |
431 | ||
872037bb PMF |
432 | DBG("the n_subbufs for the requested channel is %zd", rchan->n_subbufs); |
433 | asprintf(&reply, "%zd", rchan->n_subbufs); | |
811e4b93 PMF |
434 | |
435 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
436 | if(result) { | |
437 | ERR("listener: get_n_subbufs: ustcomm_send_reply failed"); | |
438 | goto next_cmd; | |
439 | } | |
440 | ||
441 | free(reply); | |
442 | ||
443 | break; | |
444 | } | |
445 | } | |
446 | } | |
447 | else if(nth_token_is(recvbuf, "get_subbuf_size", 0) == 1) { | |
448 | struct ltt_trace_struct *trace; | |
449 | char trace_name[] = "auto"; | |
450 | int i; | |
451 | char *channel_name; | |
452 | ||
453 | DBG("get_subbuf_size"); | |
454 | ||
455 | channel_name = nth_token(recvbuf, 1); | |
456 | if(channel_name == NULL) { | |
457 | ERR("get_subbuf_size: cannot parse channel"); | |
458 | goto next_cmd; | |
459 | } | |
460 | ||
461 | ltt_lock_traces(); | |
462 | trace = _ltt_trace_find(trace_name); | |
463 | ltt_unlock_traces(); | |
464 | ||
465 | if(trace == NULL) { | |
63fe14e5 | 466 | ERR("cannot find trace!"); |
872037bb | 467 | return (void *)1; |
811e4b93 PMF |
468 | } |
469 | ||
470 | for(i=0; i<trace->nr_channels; i++) { | |
471 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
472 | ||
473 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
474 | char *reply; | |
475 | ||
872037bb PMF |
476 | DBG("the subbuf_size for the requested channel is %zd", rchan->subbuf_size); |
477 | asprintf(&reply, "%zd", rchan->subbuf_size); | |
811e4b93 PMF |
478 | |
479 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
480 | if(result) { | |
481 | ERR("listener: get_subbuf_size: ustcomm_send_reply failed"); | |
482 | goto next_cmd; | |
483 | } | |
484 | ||
485 | free(reply); | |
3847c3ba | 486 | |
811e4b93 PMF |
487 | break; |
488 | } | |
3847c3ba PMF |
489 | } |
490 | } | |
b02e31e5 PMF |
491 | else if(nth_token_is(recvbuf, "load_probe_lib", 0) == 1) { |
492 | char *libfile; | |
493 | ||
494 | libfile = nth_token(recvbuf, 1); | |
495 | ||
496 | DBG("load_probe_lib loading %s", libfile); | |
497 | } | |
688760ef PMF |
498 | else if(nth_token_is(recvbuf, "get_subbuffer", 0) == 1) { |
499 | struct ltt_trace_struct *trace; | |
500 | char trace_name[] = "auto"; | |
501 | int i; | |
502 | char *channel_name; | |
503 | ||
504 | DBG("get_subbuf"); | |
505 | ||
506 | channel_name = nth_token(recvbuf, 1); | |
507 | if(channel_name == NULL) { | |
508 | ERR("get_subbuf: cannot parse channel"); | |
509 | goto next_cmd; | |
510 | } | |
511 | ||
512 | ltt_lock_traces(); | |
513 | trace = _ltt_trace_find(trace_name); | |
514 | ltt_unlock_traces(); | |
515 | ||
516 | if(trace == NULL) { | |
63fe14e5 | 517 | ERR("cannot find trace!"); |
872037bb | 518 | return (void *)1; |
688760ef PMF |
519 | } |
520 | ||
521 | for(i=0; i<trace->nr_channels; i++) { | |
522 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
523 | ||
524 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
525 | struct rchan_buf *rbuf = rchan->buf; | |
526 | struct ltt_channel_buf_struct *lttbuf = trace->channels[i].buf; | |
3a7b90de | 527 | struct blocked_consumer *bc; |
688760ef | 528 | |
3a7b90de PMF |
529 | bc = (struct blocked_consumer *) malloc(sizeof(struct blocked_consumer)); |
530 | if(bc == NULL) { | |
531 | ERR("malloc returned NULL"); | |
688760ef PMF |
532 | goto next_cmd; |
533 | } | |
3a7b90de PMF |
534 | bc->fd_consumer = src.fd; |
535 | bc->fd_producer = lttbuf->data_ready_fd_read; | |
536 | bc->rbuf = rbuf; | |
537 | bc->lttbuf = lttbuf; | |
538 | bc->src = src; | |
539 | bc->server = ustcomm_app.server; | |
688760ef | 540 | |
3a7b90de | 541 | list_add(&bc->list, &blocked_consumers); |
688760ef PMF |
542 | |
543 | break; | |
544 | } | |
545 | } | |
546 | } | |
547 | else if(nth_token_is(recvbuf, "put_subbuffer", 0) == 1) { | |
548 | struct ltt_trace_struct *trace; | |
549 | char trace_name[] = "auto"; | |
550 | int i; | |
551 | char *channel_name; | |
552 | long consumed_old; | |
553 | char *consumed_old_str; | |
554 | char *endptr; | |
555 | ||
556 | DBG("put_subbuf"); | |
557 | ||
558 | channel_name = strdup_malloc(nth_token(recvbuf, 1)); | |
559 | if(channel_name == NULL) { | |
560 | ERR("put_subbuf_size: cannot parse channel"); | |
561 | goto next_cmd; | |
562 | } | |
563 | ||
564 | consumed_old_str = strdup_malloc(nth_token(recvbuf, 2)); | |
565 | if(consumed_old_str == NULL) { | |
566 | ERR("put_subbuf: cannot parse consumed_old"); | |
567 | goto next_cmd; | |
568 | } | |
569 | consumed_old = strtol(consumed_old_str, &endptr, 10); | |
570 | if(*endptr != '\0') { | |
571 | ERR("put_subbuf: invalid value for consumed_old"); | |
572 | goto next_cmd; | |
573 | } | |
574 | ||
575 | ltt_lock_traces(); | |
576 | trace = _ltt_trace_find(trace_name); | |
577 | ltt_unlock_traces(); | |
578 | ||
579 | if(trace == NULL) { | |
63fe14e5 | 580 | ERR("cannot find trace!"); |
872037bb | 581 | return (void *)1; |
688760ef PMF |
582 | } |
583 | ||
584 | for(i=0; i<trace->nr_channels; i++) { | |
585 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
586 | ||
587 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
588 | struct rchan_buf *rbuf = rchan->buf; | |
589 | struct ltt_channel_buf_struct *lttbuf = trace->channels[i].buf; | |
590 | char *reply; | |
591 | long consumed_old=0; | |
592 | ||
593 | result = ltt_do_put_subbuf(rbuf, lttbuf, consumed_old); | |
594 | if(result < 0) { | |
0a58610f | 595 | WARN("ltt_do_put_subbuf: error (subbuf=%s)", channel_name); |
872037bb | 596 | asprintf(&reply, "%s", "ERROR"); |
688760ef PMF |
597 | } |
598 | else { | |
0a58610f | 599 | DBG("ltt_do_put_subbuf: success (subbuf=%s)", channel_name); |
872037bb | 600 | asprintf(&reply, "%s", "OK"); |
688760ef | 601 | } |
688760ef PMF |
602 | |
603 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
604 | if(result) { | |
605 | ERR("listener: put_subbuf: ustcomm_send_reply failed"); | |
606 | goto next_cmd; | |
607 | } | |
608 | ||
609 | free(reply); | |
610 | ||
611 | break; | |
612 | } | |
613 | } | |
614 | ||
615 | free(channel_name); | |
616 | free(consumed_old_str); | |
617 | } | |
52c51a47 PMF |
618 | else if(nth_token_is(recvbuf, "enable_marker", 0) == 1) { |
619 | char *channel_slash_name = nth_token(recvbuf, 1); | |
620 | char channel_name[256]=""; | |
621 | char marker_name[256]=""; | |
52c51a47 PMF |
622 | |
623 | result = sscanf(channel_slash_name, "%255[^/]/%255s", channel_name, marker_name); | |
624 | ||
625 | if(channel_name == NULL || marker_name == NULL) { | |
626 | WARN("invalid marker name"); | |
627 | goto next_cmd; | |
628 | } | |
629 | printf("%s %s\n", channel_name, marker_name); | |
630 | ||
631 | result = ltt_marker_connect(channel_name, marker_name, "default"); | |
632 | if(result < 0) { | |
633 | WARN("could not enable marker; channel=%s, name=%s", channel_name, marker_name); | |
634 | } | |
635 | } | |
636 | else if(nth_token_is(recvbuf, "disable_marker", 0) == 1) { | |
637 | char *channel_slash_name = nth_token(recvbuf, 1); | |
638 | char *marker_name; | |
639 | char *channel_name; | |
52c51a47 PMF |
640 | |
641 | result = sscanf(channel_slash_name, "%a[^/]/%as", &channel_name, &marker_name); | |
642 | ||
643 | if(marker_name == NULL) { | |
644 | } | |
645 | printf("%s %s\n", channel_name, marker_name); | |
646 | ||
647 | result = ltt_marker_disconnect(channel_name, marker_name, "default"); | |
648 | if(result < 0) { | |
649 | WARN("could not disable marker; channel=%s, name=%s", channel_name, marker_name); | |
650 | } | |
651 | } | |
3a7b90de PMF |
652 | // else if(nth_token_is(recvbuf, "get_notifications", 0) == 1) { |
653 | // struct ltt_trace_struct *trace; | |
654 | // char trace_name[] = "auto"; | |
655 | // int i; | |
656 | // char *channel_name; | |
657 | // | |
658 | // DBG("get_notifications"); | |
659 | // | |
660 | // channel_name = strdup_malloc(nth_token(recvbuf, 1)); | |
661 | // if(channel_name == NULL) { | |
662 | // ERR("put_subbuf_size: cannot parse channel"); | |
663 | // goto next_cmd; | |
664 | // } | |
665 | // | |
666 | // ltt_lock_traces(); | |
667 | // trace = _ltt_trace_find(trace_name); | |
668 | // ltt_unlock_traces(); | |
669 | // | |
670 | // if(trace == NULL) { | |
63fe14e5 | 671 | // ERR("cannot find trace!"); |
872037bb | 672 | // return (void *)1; |
3a7b90de PMF |
673 | // } |
674 | // | |
675 | // for(i=0; i<trace->nr_channels; i++) { | |
676 | // struct rchan *rchan = trace->channels[i].trans_channel_data; | |
677 | // int fd; | |
678 | // | |
679 | // if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
680 | // struct rchan_buf *rbuf = rchan->buf; | |
681 | // struct ltt_channel_buf_struct *lttbuf = trace->channels[i].buf; | |
682 | // | |
683 | // result = fd = ustcomm_app_detach_client(&ustcomm_app, &src); | |
684 | // if(result == -1) { | |
685 | // ERR("ustcomm_app_detach_client failed"); | |
686 | // goto next_cmd; | |
687 | // } | |
688 | // | |
689 | // lttbuf->wake_consumer_arg = (void *) fd; | |
690 | // | |
691 | // smp_wmb(); | |
692 | // | |
693 | // lttbuf->call_wake_consumer = 1; | |
694 | // | |
695 | // break; | |
696 | // } | |
697 | // } | |
698 | // | |
699 | // free(channel_name); | |
700 | // } | |
688760ef PMF |
701 | else { |
702 | ERR("unable to parse message: %s", recvbuf); | |
703 | } | |
d0b5f2b9 | 704 | |
811e4b93 | 705 | next_cmd: |
d0b5f2b9 | 706 | free(recvbuf); |
98963de4 PMF |
707 | } |
708 | } | |
709 | ||
710 | void create_listener(void) | |
711 | { | |
9160b4e4 | 712 | #ifdef USE_CLONE |
98963de4 | 713 | static char listener_stack[16384]; |
9160b4e4 | 714 | #endif |
98963de4 | 715 | |
3847c3ba | 716 | #ifdef USE_CLONE |
fbd8191b | 717 | result = clone(listener_main, listener_stack+sizeof(listener_stack)-1, CLONE_FS | CLONE_FILES | CLONE_VM | CLONE_SIGHAND | CLONE_THREAD, NULL); |
98963de4 PMF |
718 | if(result == -1) { |
719 | perror("clone"); | |
720 | } | |
3847c3ba PMF |
721 | #else |
722 | pthread_t thread; | |
b0540e11 | 723 | |
3847c3ba PMF |
724 | pthread_create(&thread, NULL, listener_main, NULL); |
725 | #endif | |
98963de4 PMF |
726 | } |
727 | ||
d0b5f2b9 PMF |
728 | /* The signal handler itself. Signals must be setup so there cannot be |
729 | nested signals. */ | |
68c1021b PMF |
730 | |
731 | void sighandler(int sig) | |
732 | { | |
d0b5f2b9 | 733 | static char have_listener = 0; |
68c1021b | 734 | DBG("sighandler"); |
d0b5f2b9 PMF |
735 | |
736 | if(!have_listener) { | |
737 | create_listener(); | |
738 | have_listener = 1; | |
739 | } | |
68c1021b PMF |
740 | } |
741 | ||
742 | /* Called by the app signal handler to chain it to us. */ | |
743 | ||
98963de4 | 744 | void chain_signal(void) |
68c1021b PMF |
745 | { |
746 | sighandler(USTSIGNAL); | |
747 | } | |
748 | ||
98963de4 | 749 | static int init_socket(void) |
68c1021b | 750 | { |
d0b5f2b9 | 751 | return ustcomm_init_app(getpid(), &ustcomm_app); |
68c1021b PMF |
752 | } |
753 | ||
9160b4e4 PMF |
754 | /* FIXME: reenable this to delete socket file. */ |
755 | ||
756 | #if 0 | |
98963de4 | 757 | static void destroy_socket(void) |
68c1021b | 758 | { |
9160b4e4 PMF |
759 | int result; |
760 | ||
761 | if(mysocketfile[0] == '\0') | |
762 | return; | |
763 | ||
764 | result = unlink(mysocketfile); | |
765 | if(result == -1) { | |
766 | PERROR("unlink"); | |
767 | } | |
68c1021b | 768 | } |
9160b4e4 | 769 | #endif |
68c1021b | 770 | |
98963de4 | 771 | static int init_signal_handler(void) |
68c1021b PMF |
772 | { |
773 | /* Attempt to handler SIGIO. If the main program wants to | |
774 | * handle it, fine, it'll override us. They it'll have to | |
775 | * use the chaining function. | |
776 | */ | |
777 | ||
778 | int result; | |
779 | struct sigaction act; | |
780 | ||
781 | result = sigemptyset(&act.sa_mask); | |
782 | if(result == -1) { | |
783 | PERROR("sigemptyset"); | |
784 | return -1; | |
785 | } | |
786 | ||
787 | act.sa_handler = sighandler; | |
788 | act.sa_flags = SA_RESTART; | |
789 | ||
790 | /* Only defer ourselves. Also, try to restart interrupted | |
791 | * syscalls to disturb the traced program as little as possible. | |
792 | */ | |
793 | result = sigaction(SIGIO, &act, NULL); | |
794 | if(result == -1) { | |
795 | PERROR("sigaction"); | |
796 | return -1; | |
797 | } | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
20b37a31 | 802 | static void auto_probe_connect(struct marker *m) |
68c1021b PMF |
803 | { |
804 | int result; | |
805 | ||
20b37a31 | 806 | result = ltt_marker_connect(m->channel, m->name, "default"); |
acbf228b PMF |
807 | if(result && result != -EEXIST) |
808 | ERR("ltt_marker_connect (marker = %s/%s, errno = %d)", m->channel, m->name, -result); | |
20b37a31 PMF |
809 | |
810 | DBG("just auto connected marker %s %s to probe default", m->channel, m->name); | |
811 | } | |
812 | ||
813 | static void __attribute__((constructor(101))) init0() | |
814 | { | |
26cc7017 PMF |
815 | /* Initialize RCU in case the constructor order is not good. */ |
816 | urcu_init(); | |
817 | ||
818 | /* It is important to do this before events start to be generated. */ | |
819 | ust_register_thread(); | |
820 | ||
20b37a31 PMF |
821 | DBG("UST_AUTOPROBE constructor"); |
822 | if(getenv("UST_AUTOPROBE")) { | |
823 | marker_set_new_marker_cb(auto_probe_connect); | |
824 | } | |
825 | } | |
826 | ||
827 | static void __attribute__((constructor(1000))) init() | |
828 | { | |
829 | int result; | |
830 | ||
831 | DBG("UST_TRACE constructor"); | |
832 | ||
3847c3ba PMF |
833 | /* Must create socket before signal handler to prevent races. |
834 | */ | |
835 | result = init_socket(); | |
836 | if(result == -1) { | |
837 | ERR("init_socket error"); | |
838 | return; | |
839 | } | |
840 | result = init_signal_handler(); | |
841 | if(result == -1) { | |
842 | ERR("init_signal_handler error"); | |
843 | return; | |
844 | } | |
68c1021b | 845 | |
4db647c5 PMF |
846 | if(getenv("UST_TRACE")) { |
847 | char trace_name[] = "auto"; | |
848 | char trace_type[] = "ustrelay"; | |
849 | ||
850 | DBG("starting early tracing"); | |
851 | ||
852 | /* Ensure marker control is initialized */ | |
853 | init_marker_control(); | |
854 | ||
855 | /* Ensure relay is initialized */ | |
856 | init_ustrelay_transport(); | |
857 | ||
858 | /* Ensure markers are initialized */ | |
859 | init_markers(); | |
860 | ||
20b37a31 PMF |
861 | /* In case. */ |
862 | ltt_channels_register("ust"); | |
4db647c5 PMF |
863 | |
864 | result = ltt_trace_setup(trace_name); | |
865 | if(result < 0) { | |
866 | ERR("ltt_trace_setup failed"); | |
867 | return; | |
868 | } | |
869 | ||
870 | result = ltt_trace_set_type(trace_name, trace_type); | |
871 | if(result < 0) { | |
872 | ERR("ltt_trace_set_type failed"); | |
873 | return; | |
874 | } | |
875 | ||
876 | result = ltt_trace_alloc(trace_name); | |
877 | if(result < 0) { | |
878 | ERR("ltt_trace_alloc failed"); | |
879 | return; | |
880 | } | |
881 | ||
882 | result = ltt_trace_start(trace_name); | |
883 | if(result < 0) { | |
884 | ERR("ltt_trace_start failed"); | |
885 | return; | |
886 | } | |
3847c3ba | 887 | inform_consumer_daemon(); |
4db647c5 PMF |
888 | } |
889 | ||
68c1021b PMF |
890 | |
891 | return; | |
892 | ||
893 | /* should decrementally destroy stuff if error */ | |
894 | ||
895 | } | |
896 | ||
897 | /* This is only called if we terminate normally, not with an unhandled signal, | |
898 | * so we cannot rely on it. */ | |
899 | ||
899b5967 PMF |
900 | /* This destructor probably isn't needed, because ustd can do crash recovery. */ |
901 | #if 0 | |
98963de4 | 902 | static void __attribute__((destructor)) fini() |
68c1021b | 903 | { |
a584bc4e PMF |
904 | int result; |
905 | ||
906 | /* if trace running, finish it */ | |
907 | ||
908 | DBG("destructor stopping traces"); | |
909 | ||
910 | result = ltt_trace_stop("auto"); | |
911 | if(result == -1) { | |
912 | ERR("ltt_trace_stop error"); | |
913 | } | |
914 | ||
915 | result = ltt_trace_destroy("auto"); | |
916 | if(result == -1) { | |
917 | ERR("ltt_trace_destroy error"); | |
918 | } | |
919 | ||
68c1021b PMF |
920 | destroy_socket(); |
921 | } | |
899b5967 | 922 | #endif |
1e2944cb PMF |
923 | |
924 | /* Notify ust that there was a fork. This needs to be called inside | |
925 | * the new process, anytime a process whose memory is not shared with | |
926 | * the parent is created. If this function is not called, the events | |
927 | * of the new process will not be collected. | |
928 | */ | |
929 | ||
930 | void ust_fork(void) | |
931 | { | |
932 | DBG("ust: forking"); | |
933 | ltt_trace_stop("auto"); | |
934 | ltt_trace_destroy("auto"); | |
935 | ltt_trace_alloc("auto"); | |
936 | ltt_trace_start("auto"); | |
937 | init_socket(); | |
938 | have_listener = 0; | |
939 | create_listener(); | |
940 | ustcomm_request_consumer(getpid(), "metadata"); | |
941 | ustcomm_request_consumer(getpid(), "ust"); | |
942 | } | |
943 |