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