Commit | Line | Data |
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68c1021b PMF |
1 | #include <stdio.h> |
2 | #include <stdint.h> | |
3 | #include <signal.h> | |
4 | #include <sys/types.h> | |
5 | #include <sys/socket.h> | |
6 | #include <sys/un.h> | |
98963de4 | 7 | #include <sched.h> |
a584bc4e | 8 | #include <fcntl.h> |
fbd8191b PMF |
9 | |
10 | #include "marker.h" | |
a584bc4e | 11 | #include "tracer.h" |
d0b5f2b9 PMF |
12 | #include "localerr.h" |
13 | #include "ustcomm.h" | |
fbd8191b | 14 | |
b02e31e5 | 15 | //#define USE_CLONE |
3847c3ba | 16 | |
68c1021b PMF |
17 | #define UNIX_PATH_MAX 108 |
18 | ||
68c1021b PMF |
19 | #define SOCKETDIR "/tmp/socks" |
20 | #define SOCKETDIRLEN sizeof(SOCKETDIR) | |
21 | #define USTSIGNAL SIGIO | |
22 | ||
98963de4 PMF |
23 | #define MAX_MSG_SIZE (100) |
24 | #define MSG_NOTIF 1 | |
25 | #define MSG_REGISTER_NOTIF 2 | |
26 | ||
a584bc4e PMF |
27 | char consumer_stack[10000]; |
28 | ||
d0b5f2b9 PMF |
29 | static struct ustcomm_app ustcomm_app; |
30 | ||
68c1021b PMF |
31 | struct tracecmd { /* no padding */ |
32 | uint32_t size; | |
33 | uint16_t command; | |
34 | }; | |
35 | ||
98963de4 PMF |
36 | //struct listener_arg { |
37 | // int pipe_fd; | |
38 | //}; | |
39 | ||
40 | struct trctl_msg { | |
41 | /* size: the size of all the fields except size itself */ | |
42 | uint32_t size; | |
43 | uint16_t type; | |
44 | /* Only the necessary part of the payload is transferred. It | |
45 | * may even be none of it. | |
46 | */ | |
47 | char payload[94]; | |
48 | }; | |
68c1021b | 49 | |
68c1021b | 50 | char mysocketfile[UNIX_PATH_MAX] = ""; |
d0b5f2b9 | 51 | //int pfd = -1; |
68c1021b | 52 | |
a584bc4e PMF |
53 | struct consumer_channel { |
54 | int fd; | |
55 | struct ltt_channel_struct *chan; | |
56 | }; | |
57 | ||
58 | int consumer(void *arg) | |
59 | { | |
60 | int result; | |
61 | int fd; | |
62 | char str[] = "Hello, this is the consumer.\n"; | |
63 | struct ltt_trace_struct *trace; | |
64 | struct consumer_channel *consumer_channels; | |
65 | int i; | |
66 | char trace_name[] = "auto"; | |
67 | ||
68 | ltt_lock_traces(); | |
69 | trace = _ltt_trace_find(trace_name); | |
70 | ltt_unlock_traces(); | |
71 | ||
72 | if(trace == NULL) { | |
73 | CPRINTF("cannot find trace!"); | |
74 | return 1; | |
75 | } | |
76 | ||
77 | consumer_channels = (struct consumer_channel *) malloc(trace->nr_channels * sizeof(struct consumer_channel)); | |
78 | if(consumer_channels == NULL) { | |
79 | ERR("malloc returned NULL"); | |
80 | return 1; | |
81 | } | |
82 | ||
83 | CPRINTF("opening trace files"); | |
84 | for(i=0; i<trace->nr_channels; i++) { | |
85 | char tmp[100]; | |
86 | struct ltt_channel_struct *chan = &trace->channels[i]; | |
87 | ||
88 | consumer_channels[i].chan = chan; | |
89 | ||
1c184644 | 90 | snprintf(tmp, sizeof(tmp), "trace/%s_0", chan->channel_name); |
688760ef | 91 | result = consumer_channels[i].fd = open(tmp, O_WRONLY | O_CREAT | O_TRUNC, 00600); |
a584bc4e PMF |
92 | if(result == -1) { |
93 | perror("open"); | |
94 | return -1; | |
95 | } | |
96 | CPRINTF("\topened trace file %s", tmp); | |
97 | ||
98 | } | |
99 | CPRINTF("done opening trace files"); | |
100 | ||
101 | for(;;) { | |
102 | /*wait*/ | |
103 | ||
104 | for(i=0; i<trace->nr_channels; i++) { | |
105 | struct rchan *rchan = consumer_channels[i].chan->trans_channel_data; | |
106 | struct rchan_buf *rbuf = rchan->buf; | |
107 | struct ltt_channel_buf_struct *lttbuf = consumer_channels[i].chan->buf; | |
108 | long consumed_old; | |
109 | ||
110 | result = ltt_do_get_subbuf(rbuf, lttbuf, &consumed_old); | |
111 | if(result < 0) { | |
1c184644 | 112 | DBG("ltt_do_get_subbuf: error: %s", strerror(-result)); |
a584bc4e PMF |
113 | } |
114 | else { | |
1c184644 | 115 | DBG("success!"); |
a584bc4e PMF |
116 | |
117 | result = write(consumer_channels[i].fd, rbuf->buf_data + (consumed_old & (2 * 4096-1)), 4096); | |
118 | ltt_do_put_subbuf(rbuf, lttbuf, consumed_old); | |
119 | } | |
120 | } | |
121 | ||
122 | sleep(1); | |
123 | } | |
a584bc4e PMF |
124 | } |
125 | ||
126 | void start_consumer(void) | |
127 | { | |
3847c3ba | 128 | #ifdef USE_CLONE |
a584bc4e PMF |
129 | int result; |
130 | ||
131 | result = clone(consumer, consumer_stack+sizeof(consumer_stack)-1, CLONE_FS | CLONE_FILES | CLONE_VM | CLONE_SIGHAND | CLONE_THREAD, NULL); | |
132 | if(result == -1) { | |
133 | perror("clone"); | |
134 | } | |
3847c3ba PMF |
135 | #else |
136 | pthread_t thread; | |
137 | ||
138 | pthread_create(&thread, NULL, consumer, NULL); | |
139 | #endif | |
a584bc4e | 140 | } |
fbd8191b PMF |
141 | |
142 | static void print_markers(void) | |
143 | { | |
144 | struct marker_iter iter; | |
145 | ||
d0b5f2b9 | 146 | lock_markers(); |
fbd8191b PMF |
147 | marker_iter_reset(&iter); |
148 | marker_iter_start(&iter); | |
149 | ||
150 | while(iter.marker) { | |
151 | fprintf(stderr, "marker: %s_%s \"%s\"\n", iter.marker->channel, iter.marker->name, iter.marker->format); | |
152 | marker_iter_next(&iter); | |
153 | } | |
d0b5f2b9 | 154 | unlock_markers(); |
fbd8191b PMF |
155 | } |
156 | ||
68c1021b PMF |
157 | void do_command(struct tracecmd *cmd) |
158 | { | |
159 | } | |
160 | ||
161 | void receive_commands() | |
162 | { | |
163 | } | |
164 | ||
98963de4 PMF |
165 | int fd_notif = -1; |
166 | void notif_cb(void) | |
167 | { | |
168 | int result; | |
169 | struct trctl_msg msg; | |
170 | ||
171 | /* FIXME: fd_notif should probably be protected by a spinlock */ | |
172 | ||
173 | if(fd_notif == -1) | |
174 | return; | |
175 | ||
176 | msg.type = MSG_NOTIF; | |
177 | msg.size = sizeof(msg.type); | |
178 | ||
179 | /* FIXME: don't block here */ | |
180 | result = write(fd_notif, &msg, msg.size+sizeof(msg.size)); | |
181 | if(result == -1) { | |
182 | PERROR("write"); | |
183 | return; | |
184 | } | |
185 | } | |
186 | ||
d0b5f2b9 PMF |
187 | #define CONSUMER_DAEMON_SOCK SOCKETDIR "/ustd" |
188 | ||
189 | static int inform_consumer_daemon(void) | |
190 | { | |
3847c3ba PMF |
191 | ustcomm_request_consumer(getpid(), "metadata"); |
192 | ustcomm_request_consumer(getpid(), "ust"); | |
d0b5f2b9 | 193 | } |
fbd8191b | 194 | |
98963de4 PMF |
195 | int listener_main(void *p) |
196 | { | |
197 | int result; | |
198 | ||
b0540e11 PMF |
199 | DBG("LISTENER"); |
200 | ||
98963de4 | 201 | for(;;) { |
98963de4 | 202 | uint32_t size; |
98963de4 PMF |
203 | struct sockaddr_un addr; |
204 | socklen_t addrlen = sizeof(addr); | |
aafb1650 PMF |
205 | char trace_name[] = "auto"; |
206 | char trace_type[] = "ustrelay"; | |
d0b5f2b9 PMF |
207 | char *recvbuf; |
208 | int len; | |
b02e31e5 | 209 | struct ustcomm_source src; |
98963de4 | 210 | |
688760ef PMF |
211 | result = ustcomm_app_recv_message(&ustcomm_app, &recvbuf, &src, -1); |
212 | if(result <= 0) { | |
d0b5f2b9 PMF |
213 | WARN("error in ustcomm_app_recv_message"); |
214 | continue; | |
215 | } | |
98963de4 | 216 | |
d0b5f2b9 PMF |
217 | DBG("received a message! it's: %s\n", recvbuf); |
218 | len = strlen(recvbuf); | |
98963de4 | 219 | |
d0b5f2b9 PMF |
220 | if(!strcmp(recvbuf, "print_markers")) { |
221 | print_markers(); | |
222 | } | |
223 | else if(!strcmp(recvbuf, "trace_setup")) { | |
224 | DBG("trace setup"); | |
fbd8191b | 225 | |
d0b5f2b9 PMF |
226 | result = ltt_trace_setup(trace_name); |
227 | if(result < 0) { | |
228 | ERR("ltt_trace_setup failed"); | |
229 | return; | |
fbd8191b | 230 | } |
d0b5f2b9 PMF |
231 | |
232 | result = ltt_trace_set_type(trace_name, trace_type); | |
233 | if(result < 0) { | |
234 | ERR("ltt_trace_set_type failed"); | |
235 | return; | |
fbd8191b | 236 | } |
d0b5f2b9 PMF |
237 | } |
238 | else if(!strcmp(recvbuf, "trace_alloc")) { | |
239 | DBG("trace alloc"); | |
240 | ||
241 | result = ltt_trace_alloc(trace_name); | |
242 | if(result < 0) { | |
243 | ERR("ltt_trace_alloc failed"); | |
244 | return; | |
fbd8191b | 245 | } |
d0b5f2b9 PMF |
246 | } |
247 | else if(!strcmp(recvbuf, "trace_start")) { | |
248 | DBG("trace start"); | |
249 | ||
250 | result = ltt_trace_start(trace_name); | |
251 | if(result < 0) { | |
252 | ERR("ltt_trace_start failed"); | |
253 | continue; | |
fbd8191b | 254 | } |
d0b5f2b9 PMF |
255 | } |
256 | else if(!strcmp(recvbuf, "trace_stop")) { | |
257 | DBG("trace stop"); | |
258 | ||
259 | result = ltt_trace_stop(trace_name); | |
260 | if(result < 0) { | |
261 | ERR("ltt_trace_stop failed"); | |
262 | return; | |
aafb1650 | 263 | } |
d0b5f2b9 PMF |
264 | } |
265 | else if(!strcmp(recvbuf, "trace_destroy")) { | |
aafb1650 | 266 | |
d0b5f2b9 | 267 | DBG("trace destroy"); |
aafb1650 | 268 | |
d0b5f2b9 PMF |
269 | result = ltt_trace_destroy(trace_name); |
270 | if(result < 0) { | |
271 | ERR("ltt_trace_destroy failed"); | |
272 | return; | |
fbd8191b | 273 | } |
98963de4 | 274 | } |
b02e31e5 | 275 | else if(nth_token_is(recvbuf, "get_shmid", 0) == 1) { |
3847c3ba PMF |
276 | struct ltt_trace_struct *trace; |
277 | char trace_name[] = "auto"; | |
278 | int i; | |
811e4b93 | 279 | char *channel_name; |
3847c3ba PMF |
280 | |
281 | DBG("get_shmid"); | |
282 | ||
811e4b93 PMF |
283 | channel_name = nth_token(recvbuf, 1); |
284 | if(channel_name == NULL) { | |
285 | ERR("get_shmid: cannot parse channel"); | |
286 | goto next_cmd; | |
287 | } | |
288 | ||
3847c3ba PMF |
289 | ltt_lock_traces(); |
290 | trace = _ltt_trace_find(trace_name); | |
291 | ltt_unlock_traces(); | |
292 | ||
293 | if(trace == NULL) { | |
294 | CPRINTF("cannot find trace!"); | |
295 | return 1; | |
296 | } | |
297 | ||
298 | for(i=0; i<trace->nr_channels; i++) { | |
299 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
300 | struct rchan_buf *rbuf = rchan->buf; | |
301 | ||
811e4b93 PMF |
302 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { |
303 | char *reply; | |
304 | ||
305 | DBG("the shmid for the requested channel is %d", rbuf->shmid); | |
306 | asprintf(&reply, "%d", rbuf->shmid); | |
307 | ||
308 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
309 | if(result) { | |
310 | ERR("listener: get_shmid: ustcomm_send_reply failed"); | |
311 | goto next_cmd; | |
312 | } | |
313 | ||
314 | free(reply); | |
315 | ||
316 | break; | |
317 | } | |
318 | } | |
319 | } | |
320 | else if(nth_token_is(recvbuf, "get_n_subbufs", 0) == 1) { | |
321 | struct ltt_trace_struct *trace; | |
322 | char trace_name[] = "auto"; | |
323 | int i; | |
324 | char *channel_name; | |
325 | ||
326 | DBG("get_n_subbufs"); | |
327 | ||
328 | channel_name = nth_token(recvbuf, 1); | |
329 | if(channel_name == NULL) { | |
330 | ERR("get_n_subbufs: cannot parse channel"); | |
331 | goto next_cmd; | |
332 | } | |
333 | ||
334 | ltt_lock_traces(); | |
335 | trace = _ltt_trace_find(trace_name); | |
336 | ltt_unlock_traces(); | |
337 | ||
338 | if(trace == NULL) { | |
339 | CPRINTF("cannot find trace!"); | |
340 | return 1; | |
341 | } | |
342 | ||
343 | for(i=0; i<trace->nr_channels; i++) { | |
344 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
345 | ||
346 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
347 | char *reply; | |
348 | ||
349 | DBG("the n_subbufs for the requested channel is %d", rchan->n_subbufs); | |
350 | asprintf(&reply, "%d", rchan->n_subbufs); | |
351 | ||
352 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
353 | if(result) { | |
354 | ERR("listener: get_n_subbufs: ustcomm_send_reply failed"); | |
355 | goto next_cmd; | |
356 | } | |
357 | ||
358 | free(reply); | |
359 | ||
360 | break; | |
361 | } | |
362 | } | |
363 | } | |
364 | else if(nth_token_is(recvbuf, "get_subbuf_size", 0) == 1) { | |
365 | struct ltt_trace_struct *trace; | |
366 | char trace_name[] = "auto"; | |
367 | int i; | |
368 | char *channel_name; | |
369 | ||
370 | DBG("get_subbuf_size"); | |
371 | ||
372 | channel_name = nth_token(recvbuf, 1); | |
373 | if(channel_name == NULL) { | |
374 | ERR("get_subbuf_size: cannot parse channel"); | |
375 | goto next_cmd; | |
376 | } | |
377 | ||
378 | ltt_lock_traces(); | |
379 | trace = _ltt_trace_find(trace_name); | |
380 | ltt_unlock_traces(); | |
381 | ||
382 | if(trace == NULL) { | |
383 | CPRINTF("cannot find trace!"); | |
384 | return 1; | |
385 | } | |
386 | ||
387 | for(i=0; i<trace->nr_channels; i++) { | |
388 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
389 | ||
390 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
391 | char *reply; | |
392 | ||
393 | DBG("the subbuf_size for the requested channel is %d", rchan->subbuf_size); | |
394 | asprintf(&reply, "%d", rchan->subbuf_size); | |
395 | ||
396 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
397 | if(result) { | |
398 | ERR("listener: get_subbuf_size: ustcomm_send_reply failed"); | |
399 | goto next_cmd; | |
400 | } | |
401 | ||
402 | free(reply); | |
3847c3ba | 403 | |
811e4b93 PMF |
404 | break; |
405 | } | |
3847c3ba PMF |
406 | } |
407 | } | |
b02e31e5 PMF |
408 | else if(nth_token_is(recvbuf, "load_probe_lib", 0) == 1) { |
409 | char *libfile; | |
410 | ||
411 | libfile = nth_token(recvbuf, 1); | |
412 | ||
413 | DBG("load_probe_lib loading %s", libfile); | |
414 | } | |
688760ef PMF |
415 | else if(nth_token_is(recvbuf, "get_subbuffer", 0) == 1) { |
416 | struct ltt_trace_struct *trace; | |
417 | char trace_name[] = "auto"; | |
418 | int i; | |
419 | char *channel_name; | |
420 | ||
421 | DBG("get_subbuf"); | |
422 | ||
423 | channel_name = nth_token(recvbuf, 1); | |
424 | if(channel_name == NULL) { | |
425 | ERR("get_subbuf: cannot parse channel"); | |
426 | goto next_cmd; | |
427 | } | |
428 | ||
429 | ltt_lock_traces(); | |
430 | trace = _ltt_trace_find(trace_name); | |
431 | ltt_unlock_traces(); | |
432 | ||
433 | if(trace == NULL) { | |
434 | CPRINTF("cannot find trace!"); | |
435 | return 1; | |
436 | } | |
437 | ||
438 | for(i=0; i<trace->nr_channels; i++) { | |
439 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
440 | ||
441 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
442 | struct rchan_buf *rbuf = rchan->buf; | |
443 | struct ltt_channel_buf_struct *lttbuf = trace->channels[i].buf; | |
444 | char *reply; | |
445 | long consumed_old=0; | |
446 | ||
447 | result = ltt_do_get_subbuf(rbuf, lttbuf, &consumed_old); | |
448 | if(result < 0) { | |
449 | DBG("ltt_do_get_subbuf: error: %s", strerror(-result)); | |
450 | asprintf(&reply, "%s %ld", "UNAVAIL", 0); | |
451 | } | |
452 | else { | |
453 | DBG("ltt_do_get_subbuf: success"); | |
454 | asprintf(&reply, "%s %ld", "OK", consumed_old); | |
455 | } | |
456 | ||
457 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
458 | if(result) { | |
459 | ERR("listener: get_subbuf: ustcomm_send_reply failed"); | |
460 | goto next_cmd; | |
461 | } | |
462 | ||
463 | free(reply); | |
464 | ||
465 | break; | |
466 | } | |
467 | } | |
468 | } | |
469 | else if(nth_token_is(recvbuf, "put_subbuffer", 0) == 1) { | |
470 | struct ltt_trace_struct *trace; | |
471 | char trace_name[] = "auto"; | |
472 | int i; | |
473 | char *channel_name; | |
474 | long consumed_old; | |
475 | char *consumed_old_str; | |
476 | char *endptr; | |
477 | ||
478 | DBG("put_subbuf"); | |
479 | ||
480 | channel_name = strdup_malloc(nth_token(recvbuf, 1)); | |
481 | if(channel_name == NULL) { | |
482 | ERR("put_subbuf_size: cannot parse channel"); | |
483 | goto next_cmd; | |
484 | } | |
485 | ||
486 | consumed_old_str = strdup_malloc(nth_token(recvbuf, 2)); | |
487 | if(consumed_old_str == NULL) { | |
488 | ERR("put_subbuf: cannot parse consumed_old"); | |
489 | goto next_cmd; | |
490 | } | |
491 | consumed_old = strtol(consumed_old_str, &endptr, 10); | |
492 | if(*endptr != '\0') { | |
493 | ERR("put_subbuf: invalid value for consumed_old"); | |
494 | goto next_cmd; | |
495 | } | |
496 | ||
497 | ltt_lock_traces(); | |
498 | trace = _ltt_trace_find(trace_name); | |
499 | ltt_unlock_traces(); | |
500 | ||
501 | if(trace == NULL) { | |
502 | CPRINTF("cannot find trace!"); | |
503 | return 1; | |
504 | } | |
505 | ||
506 | for(i=0; i<trace->nr_channels; i++) { | |
507 | struct rchan *rchan = trace->channels[i].trans_channel_data; | |
508 | ||
509 | if(!strcmp(trace->channels[i].channel_name, channel_name)) { | |
510 | struct rchan_buf *rbuf = rchan->buf; | |
511 | struct ltt_channel_buf_struct *lttbuf = trace->channels[i].buf; | |
512 | char *reply; | |
513 | long consumed_old=0; | |
514 | ||
515 | result = ltt_do_put_subbuf(rbuf, lttbuf, consumed_old); | |
516 | if(result < 0) { | |
517 | WARN("ltt_do_put_subbuf: error"); | |
518 | } | |
519 | else { | |
520 | DBG("ltt_do_put_subbuf: success"); | |
521 | } | |
522 | asprintf(&reply, "%s", "OK", consumed_old); | |
523 | ||
524 | result = ustcomm_send_reply(&ustcomm_app.server, reply, &src); | |
525 | if(result) { | |
526 | ERR("listener: put_subbuf: ustcomm_send_reply failed"); | |
527 | goto next_cmd; | |
528 | } | |
529 | ||
530 | free(reply); | |
531 | ||
532 | break; | |
533 | } | |
534 | } | |
535 | ||
536 | free(channel_name); | |
537 | free(consumed_old_str); | |
538 | } | |
539 | else { | |
540 | ERR("unable to parse message: %s", recvbuf); | |
541 | } | |
d0b5f2b9 | 542 | |
811e4b93 | 543 | next_cmd: |
d0b5f2b9 | 544 | free(recvbuf); |
98963de4 PMF |
545 | } |
546 | } | |
547 | ||
b0540e11 PMF |
548 | static char listener_stack[16384]; |
549 | ||
98963de4 PMF |
550 | void create_listener(void) |
551 | { | |
552 | int result; | |
553 | static char listener_stack[16384]; | |
b0540e11 | 554 | //char *listener_stack = malloc(16384); |
98963de4 | 555 | |
3847c3ba | 556 | #ifdef USE_CLONE |
fbd8191b | 557 | result = clone(listener_main, listener_stack+sizeof(listener_stack)-1, CLONE_FS | CLONE_FILES | CLONE_VM | CLONE_SIGHAND | CLONE_THREAD, NULL); |
98963de4 PMF |
558 | if(result == -1) { |
559 | perror("clone"); | |
560 | } | |
3847c3ba PMF |
561 | #else |
562 | pthread_t thread; | |
b0540e11 | 563 | |
3847c3ba PMF |
564 | pthread_create(&thread, NULL, listener_main, NULL); |
565 | #endif | |
98963de4 PMF |
566 | } |
567 | ||
d0b5f2b9 PMF |
568 | /* The signal handler itself. Signals must be setup so there cannot be |
569 | nested signals. */ | |
68c1021b PMF |
570 | |
571 | void sighandler(int sig) | |
572 | { | |
d0b5f2b9 | 573 | static char have_listener = 0; |
68c1021b | 574 | DBG("sighandler"); |
d0b5f2b9 PMF |
575 | |
576 | if(!have_listener) { | |
577 | create_listener(); | |
578 | have_listener = 1; | |
579 | } | |
68c1021b PMF |
580 | } |
581 | ||
582 | /* Called by the app signal handler to chain it to us. */ | |
583 | ||
98963de4 | 584 | void chain_signal(void) |
68c1021b PMF |
585 | { |
586 | sighandler(USTSIGNAL); | |
587 | } | |
588 | ||
98963de4 | 589 | static int init_socket(void) |
68c1021b | 590 | { |
d0b5f2b9 | 591 | return ustcomm_init_app(getpid(), &ustcomm_app); |
68c1021b PMF |
592 | } |
593 | ||
98963de4 | 594 | static void destroy_socket(void) |
68c1021b PMF |
595 | { |
596 | int result; | |
597 | ||
598 | if(mysocketfile[0] == '\0') | |
599 | return; | |
600 | ||
601 | result = unlink(mysocketfile); | |
602 | if(result == -1) { | |
603 | PERROR("unlink"); | |
604 | } | |
605 | } | |
606 | ||
98963de4 | 607 | static int init_signal_handler(void) |
68c1021b PMF |
608 | { |
609 | /* Attempt to handler SIGIO. If the main program wants to | |
610 | * handle it, fine, it'll override us. They it'll have to | |
611 | * use the chaining function. | |
612 | */ | |
613 | ||
614 | int result; | |
615 | struct sigaction act; | |
616 | ||
617 | result = sigemptyset(&act.sa_mask); | |
618 | if(result == -1) { | |
619 | PERROR("sigemptyset"); | |
620 | return -1; | |
621 | } | |
622 | ||
623 | act.sa_handler = sighandler; | |
624 | act.sa_flags = SA_RESTART; | |
625 | ||
626 | /* Only defer ourselves. Also, try to restart interrupted | |
627 | * syscalls to disturb the traced program as little as possible. | |
628 | */ | |
629 | result = sigaction(SIGIO, &act, NULL); | |
630 | if(result == -1) { | |
631 | PERROR("sigaction"); | |
632 | return -1; | |
633 | } | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
20b37a31 | 638 | static void auto_probe_connect(struct marker *m) |
68c1021b PMF |
639 | { |
640 | int result; | |
641 | ||
20b37a31 PMF |
642 | result = ltt_marker_connect(m->channel, m->name, "default"); |
643 | if(result) | |
644 | ERR("ltt_marker_connect"); | |
645 | ||
646 | DBG("just auto connected marker %s %s to probe default", m->channel, m->name); | |
647 | } | |
648 | ||
649 | static void __attribute__((constructor(101))) init0() | |
650 | { | |
651 | DBG("UST_AUTOPROBE constructor"); | |
652 | if(getenv("UST_AUTOPROBE")) { | |
653 | marker_set_new_marker_cb(auto_probe_connect); | |
654 | } | |
655 | } | |
656 | ||
a584bc4e PMF |
657 | static void fini(void); |
658 | ||
20b37a31 PMF |
659 | static void __attribute__((constructor(1000))) init() |
660 | { | |
661 | int result; | |
662 | ||
663 | DBG("UST_TRACE constructor"); | |
664 | ||
3847c3ba PMF |
665 | /* Must create socket before signal handler to prevent races. |
666 | */ | |
667 | result = init_socket(); | |
668 | if(result == -1) { | |
669 | ERR("init_socket error"); | |
670 | return; | |
671 | } | |
672 | result = init_signal_handler(); | |
673 | if(result == -1) { | |
674 | ERR("init_signal_handler error"); | |
675 | return; | |
676 | } | |
68c1021b | 677 | |
4db647c5 PMF |
678 | if(getenv("UST_TRACE")) { |
679 | char trace_name[] = "auto"; | |
680 | char trace_type[] = "ustrelay"; | |
681 | ||
682 | DBG("starting early tracing"); | |
683 | ||
684 | /* Ensure marker control is initialized */ | |
685 | init_marker_control(); | |
686 | ||
687 | /* Ensure relay is initialized */ | |
688 | init_ustrelay_transport(); | |
689 | ||
690 | /* Ensure markers are initialized */ | |
691 | init_markers(); | |
692 | ||
20b37a31 PMF |
693 | /* In case. */ |
694 | ltt_channels_register("ust"); | |
4db647c5 PMF |
695 | |
696 | result = ltt_trace_setup(trace_name); | |
697 | if(result < 0) { | |
698 | ERR("ltt_trace_setup failed"); | |
699 | return; | |
700 | } | |
701 | ||
702 | result = ltt_trace_set_type(trace_name, trace_type); | |
703 | if(result < 0) { | |
704 | ERR("ltt_trace_set_type failed"); | |
705 | return; | |
706 | } | |
707 | ||
708 | result = ltt_trace_alloc(trace_name); | |
709 | if(result < 0) { | |
710 | ERR("ltt_trace_alloc failed"); | |
711 | return; | |
712 | } | |
713 | ||
714 | result = ltt_trace_start(trace_name); | |
715 | if(result < 0) { | |
716 | ERR("ltt_trace_start failed"); | |
717 | return; | |
718 | } | |
3847c3ba PMF |
719 | //start_consumer(); |
720 | inform_consumer_daemon(); | |
4db647c5 PMF |
721 | } |
722 | ||
68c1021b PMF |
723 | |
724 | return; | |
725 | ||
726 | /* should decrementally destroy stuff if error */ | |
727 | ||
728 | } | |
729 | ||
730 | /* This is only called if we terminate normally, not with an unhandled signal, | |
731 | * so we cannot rely on it. */ | |
732 | ||
98963de4 | 733 | static void __attribute__((destructor)) fini() |
68c1021b | 734 | { |
a584bc4e PMF |
735 | int result; |
736 | ||
737 | /* if trace running, finish it */ | |
738 | ||
739 | DBG("destructor stopping traces"); | |
740 | ||
741 | result = ltt_trace_stop("auto"); | |
742 | if(result == -1) { | |
743 | ERR("ltt_trace_stop error"); | |
744 | } | |
745 | ||
746 | result = ltt_trace_destroy("auto"); | |
747 | if(result == -1) { | |
748 | ERR("ltt_trace_destroy error"); | |
749 | } | |
750 | ||
751 | /* FIXME: wait for the consumer to be done */ | |
688760ef PMF |
752 | DBG("waiting 5 sec for consume"); |
753 | sleep(5); | |
a584bc4e | 754 | |
68c1021b PMF |
755 | destroy_socket(); |
756 | } |