fix api breakage babeltrace + dump_snapshot compiles
[lttngtop.git] / src / lttngtop.c
1 /*
2 * Copyright (C) 2011-2012 Julien Desfossez
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
7 *
8 * This program 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
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 */
17
18 #define _GNU_SOURCE
19 #include <config.h>
20 #include <stdio.h>
21 #include <stdint.h>
22 #include <babeltrace/babeltrace.h>
23 #include <babeltrace/ctf/events.h>
24 #include <babeltrace/ctf/callbacks.h>
25 #include <babeltrace/ctf/iterator.h>
26 #include <fcntl.h>
27 #include <pthread.h>
28 #include <popt.h>
29 #include <stdlib.h>
30 #include <ftw.h>
31 #include <dirent.h>
32 #include <ctype.h>
33 #include <sys/stat.h>
34 #include <unistd.h>
35 #include <string.h>
36 #include <errno.h>
37 #include <sys/types.h>
38 #include <fts.h>
39 #include <assert.h>
40 #include <sys/mman.h>
41 #include <lttng/lttng.h>
42 #include <lttng/lttngtop-helper.h>
43
44 #include "lttngtoptypes.h"
45 #include "cputop.h"
46 #include "iostreamtop.h"
47 #include "cursesdisplay.h"
48 #include "common.h"
49
50 #define DEFAULT_FILE_ARRAY_SIZE 1
51
52 const char *opt_input_path;
53
54 struct lttngtop *copy;
55 pthread_t display_thread;
56 pthread_t timer_thread;
57
58 unsigned long refresh_display = 1 * NSEC_PER_SEC;
59 unsigned long last_display_update = 0;
60 int quit = 0;
61
62 /* LIVE */
63 /* list of FDs available for being read with snapshots */
64 struct mmap_stream_list mmap_list;
65 GPtrArray *lttng_consumer_stream_array;
66 int sessiond_metadata, consumerd_metadata;
67 struct lttng_consumer_local_data *ctx = NULL;
68 /* list of snapshots currently not consumed */
69 GPtrArray *available_snapshots;
70 sem_t metadata_available;
71 FILE *metadata_fp;
72 int trace_opened = 0;
73 int metadata_ready = 0;
74
75 enum {
76 OPT_NONE = 0,
77 OPT_HELP,
78 OPT_LIST,
79 OPT_VERBOSE,
80 OPT_DEBUG,
81 OPT_NAMES,
82 };
83
84 static struct poptOption long_options[] = {
85 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
86 { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
87 { NULL, 0, 0, NULL, 0, NULL, NULL },
88 };
89
90 void *refresh_thread(void *p)
91 {
92 while (1) {
93 if (quit)
94 return NULL;
95 sem_wait(&pause_sem);
96 sem_post(&pause_sem);
97 sem_post(&timer);
98 sleep(refresh_display/NSEC_PER_SEC);
99 }
100 }
101
102 void *ncurses_display(void *p)
103 {
104 unsigned int current_display_index = 0;
105
106 sem_wait(&bootstrap);
107 /*
108 * Prevent the 1 second delay when we hit ESC
109 */
110 ESCDELAY = 0;
111 init_ncurses();
112
113 while (1) {
114 sem_wait(&timer);
115 sem_wait(&goodtodisplay);
116 sem_wait(&pause_sem);
117
118 copy = g_ptr_array_index(copies, current_display_index);
119 assert(copy);
120 display(current_display_index++);
121
122 sem_post(&goodtoupdate);
123 sem_post(&pause_sem);
124
125 if (quit) {
126 reset_ncurses();
127 pthread_exit(0);
128 }
129 }
130 }
131
132 /*
133 * hook on each event to check the timestamp and refresh the display if
134 * necessary
135 */
136 enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
137 {
138 unsigned long timestamp;
139
140 timestamp = bt_ctf_get_real_timestamp(call_data);
141 if (timestamp == -1ULL)
142 goto error;
143
144 if (last_display_update == 0)
145 last_display_update = timestamp;
146
147 if (timestamp - last_display_update >= refresh_display) {
148 sem_wait(&goodtoupdate);
149 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
150 timestamp));
151 sem_post(&goodtodisplay);
152 sem_post(&bootstrap);
153 last_display_update = timestamp;
154 }
155 return BT_CB_OK;
156
157 error:
158 fprintf(stderr, "check_timestamp callback error\n");
159 return BT_CB_ERROR_STOP;
160 }
161
162 /*
163 * get_perf_counter : get or create and return a perf_counter struct for
164 * either a process or a cpu (only one of the 2 parameters mandatory)
165 */
166 struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
167 struct cputime *cpu)
168 {
169 struct perfcounter *ret;
170 GHashTable *table;
171
172 if (proc)
173 table = proc->perf;
174 else if (cpu)
175 table = cpu->perf;
176 else
177 goto error;
178
179 ret = g_hash_table_lookup(table, (gpointer) name);
180 if (ret)
181 goto end;
182
183 ret = g_new0(struct perfcounter, 1);
184 /* by default, make it visible in the UI */
185 ret->visible = 1;
186 g_hash_table_insert(table, (gpointer) strdup(name), ret);
187
188 end:
189 return ret;
190
191 error:
192 return NULL;
193 }
194
195 void update_perf_value(struct processtop *proc, struct cputime *cpu,
196 const char *name, int value)
197 {
198 struct perfcounter *cpu_perf, *process_perf;
199
200 cpu_perf = get_perf_counter(name, NULL, cpu);
201 if (cpu_perf->count < value) {
202 process_perf = get_perf_counter(name, proc, NULL);
203 process_perf->count += value - cpu_perf->count;
204 cpu_perf->count = value;
205 }
206 }
207
208 void extract_perf_counter_scope(const struct bt_ctf_event *event,
209 const struct bt_definition *scope,
210 struct processtop *proc,
211 struct cputime *cpu)
212 {
213 struct bt_definition const * const *list = NULL;
214 const struct bt_definition *field;
215 unsigned int count;
216 struct perfcounter *perfcounter;
217 GHashTableIter iter;
218 gpointer key;
219 int ret;
220
221 if (!scope)
222 goto end;
223
224 ret = bt_ctf_get_field_list(event, scope, &list, &count);
225 if (ret < 0)
226 goto end;
227
228 if (count == 0)
229 goto end;
230
231 g_hash_table_iter_init(&iter, global_perf_liszt);
232 while (g_hash_table_iter_next (&iter, &key, (gpointer) &perfcounter)) {
233 field = bt_ctf_get_field(event, scope, (char *) key);
234 if (field) {
235 int value = bt_ctf_get_uint64(field);
236 if (bt_ctf_field_get_error())
237 continue;
238 update_perf_value(proc, cpu, (char *) key, value);
239 }
240 }
241
242 end:
243 return;
244 }
245
246 void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
247 {
248 struct cputime *cpu;
249 const struct bt_definition *scope;
250
251 cpu = get_cpu(get_cpu_id(event));
252
253 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
254 extract_perf_counter_scope(event, scope, proc, cpu);
255
256 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
257 extract_perf_counter_scope(event, scope, proc, cpu);
258
259 scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
260 extract_perf_counter_scope(event, scope, proc, cpu);
261 }
262
263 enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
264 void *private_data)
265 {
266 int pid, tid, ppid;
267 char *comm;
268 struct processtop *parent, *child;
269 unsigned long timestamp;
270
271 timestamp = bt_ctf_get_real_timestamp(call_data);
272 if (timestamp == -1ULL)
273 goto error;
274
275 pid = get_context_pid(call_data);
276 if (pid == -1ULL) {
277 goto error;
278 }
279 tid = get_context_tid(call_data);
280 if (tid == -1ULL) {
281 goto error;
282 }
283 ppid = get_context_ppid(call_data);
284 if (ppid == -1ULL) {
285 goto error;
286 }
287 comm = get_context_comm(call_data);
288 if (!comm) {
289 goto error;
290 }
291
292 /* find or create the current process */
293 child = find_process_tid(&lttngtop, tid, comm);
294 if (!child)
295 child = add_proc(&lttngtop, tid, comm, timestamp);
296 update_proc(child, pid, tid, ppid, comm);
297
298 if (pid != tid) {
299 /* find or create the parent */
300 parent = find_process_tid(&lttngtop, pid, comm);
301 if (!parent) {
302 parent = add_proc(&lttngtop, pid, comm, timestamp);
303 parent->pid = pid;
304 }
305
306 /* attach the parent to the current process */
307 child->threadparent = parent;
308 add_thread(parent, child);
309 }
310
311 update_perf_counter(child, call_data);
312
313 return BT_CB_OK;
314
315 error:
316 return BT_CB_ERROR_STOP;
317 }
318
319 void init_lttngtop()
320 {
321 copies = g_ptr_array_new();
322 global_perf_liszt = g_hash_table_new(g_str_hash, g_str_equal);
323
324 sem_init(&goodtodisplay, 0, 0);
325 sem_init(&goodtoupdate, 0, 1);
326 sem_init(&timer, 0, 1);
327 sem_init(&bootstrap, 0, 0);
328 sem_init(&pause_sem, 0, 1);
329 sem_init(&end_trace_sem, 0, 0);
330
331 reset_global_counters();
332 lttngtop.nbproc = 0;
333 lttngtop.nbthreads = 0;
334 lttngtop.nbfiles = 0;
335
336 lttngtop.process_table = g_ptr_array_new();
337 lttngtop.files_table = g_ptr_array_new();
338 lttngtop.cpu_table = g_ptr_array_new();
339 }
340
341 void usage(FILE *fp)
342 {
343 fprintf(fp, "LTTngTop %s\n\n", VERSION);
344 fprintf(fp, "Usage : lttngtop /path/to/trace\n");
345 }
346
347 /*
348 * Return 0 if caller should continue, < 0 if caller should return
349 * error, > 0 if caller should exit without reporting error.
350 */
351 static int parse_options(int argc, char **argv)
352 {
353 poptContext pc;
354 int opt, ret = 0;
355
356 pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
357 poptReadDefaultConfig(pc, 0);
358
359 while ((opt = poptGetNextOpt(pc)) != -1) {
360 switch (opt) {
361 case OPT_HELP:
362 usage(stdout);
363 ret = 1; /* exit cleanly */
364 goto end;
365 default:
366 ret = -EINVAL;
367 goto end;
368 }
369 }
370
371 opt_input_path = poptGetArg(pc);
372
373 end:
374 if (pc) {
375 poptFreeContext(pc);
376 }
377 return ret;
378 }
379
380 void iter_trace(struct bt_context *bt_ctx)
381 {
382 struct bt_ctf_iter *iter;
383 struct bt_iter_pos begin_pos;
384 const struct bt_ctf_event *event;
385 int ret = 0;
386
387 begin_pos.type = BT_SEEK_BEGIN;
388 iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
389
390 /* at each event check if we need to refresh */
391 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
392 check_timestamp,
393 NULL, NULL, NULL);
394 /* at each event, verify the status of the process table */
395 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
396 fix_process_table,
397 NULL, NULL, NULL);
398 /* to handle the scheduling events */
399 bt_ctf_iter_add_callback(iter,
400 g_quark_from_static_string("sched_switch"),
401 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
402 /* to clean up the process table */
403 bt_ctf_iter_add_callback(iter,
404 g_quark_from_static_string("sched_process_free"),
405 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
406 /* to get all the process from the statedumps */
407 bt_ctf_iter_add_callback(iter,
408 g_quark_from_static_string(
409 "lttng_statedump_process_state"),
410 NULL, 0, handle_statedump_process_state,
411 NULL, NULL, NULL);
412
413 /* for IO top */
414 bt_ctf_iter_add_callback(iter,
415 g_quark_from_static_string("exit_syscall"),
416 NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
417 bt_ctf_iter_add_callback(iter,
418 g_quark_from_static_string("sys_write"),
419 NULL, 0, handle_sys_write, NULL, NULL, NULL);
420 bt_ctf_iter_add_callback(iter,
421 g_quark_from_static_string("sys_read"),
422 NULL, 0, handle_sys_read, NULL, NULL, NULL);
423 bt_ctf_iter_add_callback(iter,
424 g_quark_from_static_string("sys_open"),
425 NULL, 0, handle_sys_open, NULL, NULL, NULL);
426 bt_ctf_iter_add_callback(iter,
427 g_quark_from_static_string("sys_close"),
428 NULL, 0, handle_sys_close, NULL, NULL, NULL);
429 bt_ctf_iter_add_callback(iter,
430 g_quark_from_static_string(
431 "lttng_statedump_file_descriptor"),
432 NULL, 0, handle_statedump_file_descriptor,
433 NULL, NULL, NULL);
434
435 while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
436 ret = bt_iter_next(bt_ctf_get_iter(iter));
437 if (ret < 0)
438 goto end_iter;
439 }
440
441 /* block until quit, we reached the end of the trace */
442 sem_wait(&end_trace_sem);
443
444 end_iter:
445 bt_ctf_iter_destroy(iter);
446 }
447
448 /*
449 * bt_context_add_traces_recursive: Open a trace recursively
450 * (copied from BSD code in converter/babeltrace.c)
451 *
452 * Find each trace present in the subdirectory starting from the given
453 * path, and add them to the context. The packet_seek parameter can be
454 * NULL: this specify to use the default format packet_seek.
455 *
456 * Return: 0 on success, nonzero on failure.
457 * Unable to open toplevel: failure.
458 * Unable to open some subdirectory or file: warn and continue;
459 */
460 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
461 const char *format_str,
462 void (*packet_seek)(struct bt_stream_pos *pos,
463 size_t offset, int whence))
464 {
465 FTS *tree;
466 FTSENT *node;
467 GArray *trace_ids;
468 char lpath[PATH_MAX];
469 char * const paths[2] = { lpath, NULL };
470 int ret = -1;
471
472 /*
473 * Need to copy path, because fts_open can change it.
474 * It is the pointer array, not the strings, that are constant.
475 */
476 strncpy(lpath, path, PATH_MAX);
477 lpath[PATH_MAX - 1] = '\0';
478
479 tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
480 if (tree == NULL) {
481 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
482 path);
483 return -EINVAL;
484 }
485
486 trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
487
488 while ((node = fts_read(tree))) {
489 int dirfd, metafd;
490
491 if (!(node->fts_info & FTS_D))
492 continue;
493
494 dirfd = open(node->fts_accpath, 0);
495 if (dirfd < 0) {
496 fprintf(stderr, "[error] [Context] Unable to open trace "
497 "directory file descriptor.\n");
498 ret = dirfd;
499 goto error;
500 }
501 metafd = openat(dirfd, "metadata", O_RDONLY);
502 if (metafd < 0) {
503 close(dirfd);
504 ret = -1;
505 continue;
506 } else {
507 int trace_id;
508
509 ret = close(metafd);
510 if (ret < 0) {
511 perror("close");
512 goto error;
513 }
514 ret = close(dirfd);
515 if (ret < 0) {
516 perror("close");
517 goto error;
518 }
519
520 trace_id = bt_context_add_trace(ctx,
521 node->fts_accpath, format_str,
522 packet_seek, NULL, NULL);
523 if (trace_id < 0) {
524 fprintf(stderr, "[warning] [Context] opening trace \"%s\" from %s "
525 "for reading.\n", node->fts_accpath, path);
526 /* Allow to skip erroneous traces. */
527 continue;
528 }
529 g_array_append_val(trace_ids, trace_id);
530 }
531 }
532
533 g_array_free(trace_ids, TRUE);
534 return ret;
535
536 error:
537 return ret;
538 }
539
540 static int check_field_requirements(const struct bt_ctf_field_decl *const * field_list,
541 int field_cnt, int *tid_check, int *pid_check,
542 int *procname_check, int *ppid_check)
543 {
544 int j;
545 struct perfcounter *global;
546 const char *name;
547
548 for (j = 0; j < field_cnt; j++) {
549 name = bt_ctf_get_decl_field_name(field_list[j]);
550 if (*tid_check == 0) {
551 if (strncmp(name, "tid", 3) == 0)
552 (*tid_check)++;
553 }
554 if (*pid_check == 0) {
555 if (strncmp(name, "pid", 3) == 0)
556 (*pid_check)++;
557 }
558 if (*ppid_check == 0) {
559 if (strncmp(name, "ppid", 4) == 0)
560 (*ppid_check)++;
561 }
562 if (*procname_check == 0) {
563 if (strncmp(name, "procname", 8) == 0)
564 (*procname_check)++;
565 }
566 if (strncmp(name, "perf_", 5) == 0) {
567 global = g_hash_table_lookup(global_perf_liszt, (gpointer) name);
568 if (!global) {
569 global = g_new0(struct perfcounter, 1);
570 /* by default, sort on the first perf context */
571 if (g_hash_table_size(global_perf_liszt) == 0)
572 global->sort = 1;
573 global->visible = 1;
574 g_hash_table_insert(global_perf_liszt, (gpointer) strdup(name), global);
575 }
576 }
577 }
578
579 if (*tid_check == 1 && *pid_check == 1 && *ppid_check == 1 &&
580 *procname_check == 1)
581 return 0;
582
583 return -1;
584 }
585
586 /*
587 * check_requirements: check if the required context informations are available
588 *
589 * If each mandatory context information is available for at least in one
590 * event, return 0 otherwise return -1.
591 */
592 int check_requirements(struct bt_context *ctx)
593 {
594 unsigned int i, evt_cnt, field_cnt;
595 struct bt_ctf_event_decl *const * evt_list;
596 const struct bt_ctf_field_decl *const * field_list;
597 int tid_check = 0;
598 int pid_check = 0;
599 int procname_check = 0;
600 int ppid_check = 0;
601 int ret = 0;
602
603 bt_ctf_get_event_decl_list(0, ctx, &evt_list, &evt_cnt);
604 for (i = 0; i < evt_cnt; i++) {
605 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_EVENT_CONTEXT,
606 &field_list, &field_cnt);
607 ret = check_field_requirements(field_list, field_cnt,
608 &tid_check, &pid_check, &procname_check,
609 &ppid_check);
610
611 bt_ctf_get_decl_fields(evt_list[i], BT_EVENT_CONTEXT,
612 &field_list, &field_cnt);
613 ret = check_field_requirements(field_list, field_cnt,
614 &tid_check, &pid_check, &procname_check,
615 &ppid_check);
616
617 bt_ctf_get_decl_fields(evt_list[i], BT_STREAM_PACKET_CONTEXT,
618 &field_list, &field_cnt);
619 ret = check_field_requirements(field_list, field_cnt,
620 &tid_check, &pid_check, &procname_check,
621 &ppid_check);
622 }
623
624 if (tid_check == 0) {
625 ret = -1;
626 fprintf(stderr, "[error] missing tid context information\n");
627 }
628 if (pid_check == 0) {
629 ret = -1;
630 fprintf(stderr, "[error] missing pid context information\n");
631 }
632 if (ppid_check == 0) {
633 ret = -1;
634 fprintf(stderr, "[error] missing ppid context information\n");
635 }
636 if (procname_check == 0) {
637 ret = -1;
638 fprintf(stderr, "[error] missing procname context information\n");
639 }
640
641 return ret;
642 }
643
644 void dump_snapshot()
645 {
646 struct lttng_consumer_stream *iter;
647 unsigned long spos;
648 struct mmap_stream *new_snapshot;
649
650 int ret = 0;
651 int i;
652 /*
653 * try lock mutex ressource courante (overrun)
654 * if fail : overrun
655 * stop trace (flush implicite avant stop)
656 * lttng_consumer_take_snapshot
657 * read timestamp packet end (use time as end pos)
658 * - stream_packet_context
659 * - reculer de 1 subbuf : pos - max_subbuff_size
660 *
661 * - position de fin (take_snapshot)
662 * - mov_pos_slow ( fin - max_subbuff_size) lire timestamp packet end
663 * - prend min(end) (activité sur tous les streams)
664 *
665 * start trace
666 * unlock mutex
667 */
668
669 helper_kernctl_buffer_flush(consumerd_metadata);
670 for (i = 0; i < lttng_consumer_stream_array->len; i++) {
671 iter = g_ptr_array_index(lttng_consumer_stream_array, i);
672 helper_kernctl_buffer_flush(helper_get_lttng_consumer_stream_wait_fd(iter));
673 ret = helper_lttng_consumer_take_snapshot(ctx, iter);
674 if (ret != 0) {
675 ret = errno;
676 perror("lttng_consumer_take_snapshots");
677 goto end;
678 }
679 }
680 for (i = 0; i < lttng_consumer_stream_array->len; i++) {
681 iter = g_ptr_array_index(lttng_consumer_stream_array, i);
682 //cds_list_for_each_entry(iter2, &mmap_stream_list.head, list) {
683
684 ret = helper_lttng_consumer_get_produced_snapshot(ctx, iter, &spos);
685 if (ret != 0) {
686 ret = errno;
687 perror("helper_lttng_consumer_get_produced_snapshot");
688 goto end;
689 }
690 //while (iter->last_pos < spos) { FIXME : last_pos does not exists
691 new_snapshot = g_new0(struct mmap_stream, 1);
692 new_snapshot->fd = helper_get_lttng_consumer_stream_wait_fd(iter);
693 //FIXME new_snapshot->last_pos = iter->last_pos; /* not last_pos, pos for the snapshot */
694 // fprintf(stderr,"ADDING AVAILABLE SNAPSHOT ON FD %d AT POSITION %lu\n",
695 // new_snapshot->kconsumerd_fd->wait_fd,
696 // new_snapshot->last_pos);
697 g_ptr_array_add(available_snapshots, new_snapshot);
698 //FIXME iter->last_pos += iter->chan->max_sb_size;
699 //}
700 }
701
702 if (!metadata_ready) {
703 // fprintf(stderr, "BLOCKING BEFORE METADATA\n");
704 sem_wait(&metadata_available);
705 // fprintf(stderr,"OPENING TRACE\n");
706 if (access("/tmp/livesession/kernel/metadata", F_OK) != 0) {
707 fprintf(stderr,"NO METADATA FILE, SKIPPING\n");
708 return;
709 }
710 metadata_ready = 1;
711 metadata_fp = fopen("/tmp/livesession/kernel/metadata", "r");
712 }
713
714 if (!trace_opened) {
715 //bt_ctx = bt_context_create();
716 // ret = bt_context_add_trace(ctx, NULL, "ctf", ctf_move_mmap_pos_slow, mmap_list, metadata_fp);
717 trace_opened = 1;
718 }
719 //iter_trace(bt_ctx);
720
721 end:
722 return;
723 }
724
725 ssize_t read_subbuffer(struct lttng_consumer_stream *kconsumerd_fd,
726 struct lttng_consumer_local_data *ctx)
727 {
728 unsigned long len;
729 int err;
730 long ret = 0;
731 int infd = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
732
733 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_SPLICE) {
734 /* Get the next subbuffer */
735 printf("get_next : %d\n", infd);
736 err = helper_kernctl_get_next_subbuf(infd);
737 if (err != 0) {
738 ret = errno;
739 perror("Reserving sub buffer failed (everything is normal, "
740 "it is due to concurrency)");
741 goto end;
742 }
743 /* read the whole subbuffer */
744 err = helper_kernctl_get_padded_subbuf_size(infd, &len);
745 if (err != 0) {
746 ret = errno;
747 perror("Getting sub-buffer len failed.");
748 goto end;
749 }
750 printf("len : %ld\n", len);
751
752 /* splice the subbuffer to the tracefile */
753 ret = helper_lttng_consumer_on_read_subbuffer_splice(ctx, kconsumerd_fd, len);
754 if (ret < 0) {
755 /*
756 * display the error but continue processing to try
757 * to release the subbuffer
758 */
759 fprintf(stderr,"Error splicing to tracefile\n");
760 }
761 printf("ret : %ld\n", ret);
762 printf("put_next : %d\n", infd);
763 err = helper_kernctl_put_next_subbuf(infd);
764 if (err != 0) {
765 ret = errno;
766 perror("Reserving sub buffer failed (everything is normal, "
767 "it is due to concurrency)");
768 goto end;
769 }
770 sem_post(&metadata_available);
771 }
772
773 end:
774 return 0;
775 }
776
777 int on_update_fd(int key, uint32_t state)
778 {
779 /* let the lib handle the metadata FD */
780 if (key == sessiond_metadata)
781 return 0;
782 return 1;
783 }
784
785 int on_recv_fd(struct lttng_consumer_stream *kconsumerd_fd)
786 {
787 int ret;
788 struct mmap_stream *new_info;
789 size_t tmp_mmap_len;
790
791 /* Opening the tracefile in write mode */
792 if (helper_get_lttng_consumer_stream_path_name(kconsumerd_fd) != NULL) {
793 ret = open(helper_get_lttng_consumer_stream_path_name(kconsumerd_fd),
794 O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU|S_IRWXG|S_IRWXO);
795 if (ret < 0) {
796 perror("open");
797 goto end;
798 }
799 helper_set_lttng_consumer_stream_out_fd(kconsumerd_fd, ret);
800 }
801
802 if (helper_get_lttng_consumer_stream_output(kconsumerd_fd) == LTTNG_EVENT_MMAP) {
803 new_info = malloc(sizeof(struct mmap_stream));
804 new_info->fd = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
805 bt_list_add(&new_info->list, &mmap_list.head);
806
807 /* get the len of the mmap region */
808 ret = helper_kernctl_get_mmap_len(helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd),
809 &tmp_mmap_len);
810 if (ret != 0) {
811 ret = errno;
812 perror("helper_kernctl_get_mmap_len");
813 goto end;
814 }
815 helper_set_lttng_consumer_stream_mmap_len(kconsumerd_fd, tmp_mmap_len);
816
817 helper_set_lttng_consumer_stream_mmap_base(kconsumerd_fd,
818 mmap(NULL, helper_get_lttng_consumer_stream_mmap_len(kconsumerd_fd),
819 PROT_READ, MAP_PRIVATE, helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd), 0));
820 if (helper_get_lttng_consumer_stream_mmap_base(kconsumerd_fd) == MAP_FAILED) {
821 perror("Error mmaping");
822 ret = -1;
823 goto end;
824 }
825
826 g_ptr_array_add(lttng_consumer_stream_array, kconsumerd_fd);
827 ret = 1;
828 } else {
829 consumerd_metadata = helper_get_lttng_consumer_stream_wait_fd(kconsumerd_fd);
830 sessiond_metadata = helper_get_lttng_consumer_stream_key(kconsumerd_fd);
831 ret = 0;
832 }
833
834 end:
835 return ret;
836 }
837
838
839 int setup_consumer(char *command_sock_path, pthread_t *threads,
840 struct lttng_consumer_local_data *ctx)
841 {
842 int ret = 0;
843
844 ctx = helper_lttng_consumer_create(HELPER_LTTNG_CONSUMER_KERNEL,
845 read_subbuffer, NULL, on_recv_fd, on_update_fd);
846 if (!ctx)
847 goto end;
848
849 unlink(command_sock_path);
850 helper_lttng_consumer_set_command_sock_path(ctx, command_sock_path);
851 helper_lttng_consumer_init();
852
853 /* Create the thread to manage the receive of fd */
854 ret = pthread_create(&threads[0], NULL, helper_lttng_consumer_thread_receive_fds,
855 (void *) ctx);
856 if (ret != 0) {
857 perror("pthread_create");
858 goto end;
859 }
860 /* Create thread to manage the polling/writing of traces */
861 ret = pthread_create(&threads[1], NULL, helper_lttng_consumer_thread_poll_fds,
862 (void *) ctx);
863 if (ret != 0) {
864 perror("pthread_create");
865 goto end;
866 }
867
868 end:
869 return ret;
870 }
871
872 int setup_live_tracing()
873 {
874 struct lttng_domain dom;
875 struct lttng_channel chan;
876 char *channel_name = "mmapchan";
877 struct lttng_event ev;
878 int ret = 0;
879 char *command_sock_path = "/tmp/consumerd_sock";
880 static pthread_t threads[2]; /* recv_fd, poll */
881 struct lttng_event_context kctxpid, kctxcomm, kctxppid, kctxtid;
882
883 struct lttng_handle *handle;
884
885 BT_INIT_LIST_HEAD(&mmap_list.head);
886
887 lttng_consumer_stream_array = g_ptr_array_new();
888
889 if ((ret = setup_consumer(command_sock_path, threads, ctx)) < 0) {
890 fprintf(stderr,"error setting up consumer\n");
891 goto end;
892 }
893
894 available_snapshots = g_ptr_array_new();
895
896 /* setup the session */
897 dom.type = LTTNG_DOMAIN_KERNEL;
898
899 ret = system("rm -rf /tmp/livesession");
900
901 if ((ret = lttng_create_session("test", "/tmp/livesession")) < 0) {
902 fprintf(stderr,"error creating the session : %s\n",
903 helper_lttcomm_get_readable_code(ret));
904 goto end;
905 }
906
907 if ((handle = lttng_create_handle("test", &dom)) == NULL) {
908 fprintf(stderr,"error creating handle\n");
909 goto end;
910 }
911
912 if ((ret = lttng_register_consumer(handle, command_sock_path)) < 0) {
913 fprintf(stderr,"error registering consumer : %s\n",
914 helper_lttcomm_get_readable_code(ret));
915 goto end;
916 }
917
918 strcpy(chan.name, channel_name);
919 chan.attr.overwrite = 1;
920 // chan.attr.subbuf_size = 32768;
921 chan.attr.subbuf_size = 1048576; /* 1MB */
922 chan.attr.num_subbuf = 4;
923 chan.attr.switch_timer_interval = 0;
924 chan.attr.read_timer_interval = 200;
925 chan.attr.output = LTTNG_EVENT_MMAP;
926
927 if ((ret = lttng_enable_channel(handle, &chan)) < 0) {
928 fprintf(stderr,"error creating channel : %s\n", helper_lttcomm_get_readable_code(ret));
929 goto end;
930 }
931
932 sprintf(ev.name, "sched_switch");
933 ev.type = LTTNG_EVENT_TRACEPOINT;
934
935 //if ((ret = lttng_enable_event(handle, NULL, channel_name)) < 0) {
936 if ((ret = lttng_enable_event(handle, &ev, channel_name)) < 0) {
937 fprintf(stderr,"error enabling event : %s\n", helper_lttcomm_get_readable_code(ret));
938 goto end;
939 }
940
941 kctxpid.ctx = LTTNG_EVENT_CONTEXT_PID;
942 lttng_add_context(handle, &kctxpid, NULL, NULL);
943 kctxppid.ctx = LTTNG_EVENT_CONTEXT_PPID;
944 lttng_add_context(handle, &kctxppid, NULL, NULL);
945 kctxcomm.ctx = LTTNG_EVENT_CONTEXT_PROCNAME;
946 lttng_add_context(handle, &kctxcomm, NULL, NULL);
947 kctxtid.ctx = LTTNG_EVENT_CONTEXT_TID;
948 lttng_add_context(handle, &kctxtid, NULL, NULL);
949
950 if ((ret = lttng_start_tracing("test")) < 0) {
951 fprintf(stderr,"error starting tracing : %s\n", helper_lttcomm_get_readable_code(ret));
952 goto end;
953 }
954
955 helper_kernctl_buffer_flush(consumerd_metadata);
956 sleep(10);
957
958 lttng_stop_tracing("test");
959 lttng_destroy_session("test");
960
961 /* block until metadata is ready */
962 sem_init(&metadata_available, 0, 0);
963
964 //init_lttngtop();
965
966 end:
967 return ret;
968 }
969
970 int main(int argc, char **argv)
971 {
972 int ret;
973 struct bt_context *bt_ctx = NULL;
974
975 ret = parse_options(argc, argv);
976 if (ret < 0) {
977 fprintf(stdout, "Error parsing options.\n\n");
978 usage(stdout);
979 exit(EXIT_FAILURE);
980 } else if (ret > 0) {
981 exit(EXIT_SUCCESS);
982 }
983
984 if (!opt_input_path) {
985 printf("live tracing enabled\n");
986 setup_live_tracing();
987 goto end;
988 } else {
989 init_lttngtop();
990
991 bt_ctx = bt_context_create();
992 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
993 if (ret < 0) {
994 fprintf(stderr, "[error] Opening the trace\n");
995 goto end;
996 }
997
998 ret = check_requirements(bt_ctx);
999 if (ret < 0) {
1000 fprintf(stderr, "[error] some mandatory contexts were missing, exiting.\n");
1001 goto end;
1002 }
1003 pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
1004 pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
1005
1006 iter_trace(bt_ctx);
1007
1008 quit = 1;
1009 pthread_join(display_thread, NULL);
1010 pthread_join(timer_thread, NULL);
1011 }
1012
1013 end:
1014 if (bt_ctx)
1015 bt_context_put(bt_ctx);
1016
1017 return 0;
1018 }
This page took 0.080016 seconds and 4 git commands to generate.