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