projects / babeltrace.git / blob
? search:


5d22d9e44de2574391fb157d3739db7a2c3b8b03
[babeltrace.git] / formats / ctf / ctf.c
1 /*
2 * BabelTrace - Common Trace Format (CTF)
3 *
4 * Format registration.
5 *
6 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
7 *
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 * SOFTWARE.
27 */
28
29 #include <babeltrace/format.h>
30 #include <babeltrace/format-internal.h>
31 #include <babeltrace/ctf/types.h>
32 #include <babeltrace/ctf/metadata.h>
33 #include <babeltrace/babeltrace-internal.h>
34 #include <babeltrace/ctf/events-internal.h>
35 #include <babeltrace/trace-handle-internal.h>
36 #include <babeltrace/context-internal.h>
37 #include <babeltrace/compat/uuid.h>
38 #include <babeltrace/endian.h>
39 #include <babeltrace/error.h>
40 #include <babeltrace/trace-debug-info.h>
41 #include <babeltrace/ctf/ctf-index.h>
42 #include <inttypes.h>
43 #include <stdio.h>
44 #include <sys/mman.h>
45 #include <errno.h>
46 #include <sys/types.h>
47 #include <sys/stat.h>
48 #include <fcntl.h>
49 #include <dirent.h>
50 #include <glib.h>
51 #include <unistd.h>
52 #include <stdlib.h>
53
54 #include "metadata/ctf-scanner.h"
55 #include "metadata/ctf-parser.h"
56 #include "metadata/ctf-ast.h"
57 #include "events-private.h"
58 #include <babeltrace/compat/memstream.h>
59 #include <babeltrace/compat/fcntl.h>
60
61 #define LOG2_CHAR_BIT 3
62
63 /*
64 * Length of first attempt at mapping a packet header, in bits.
65 */
66 #define DEFAULT_HEADER_LEN (getpagesize() * CHAR_BIT)
67
68 /*
69 * Lenght of packet to write, in bits.
70 */
71 #define WRITE_PACKET_LEN (getpagesize() * 8 * CHAR_BIT)
72
73 #define NSEC_PER_SEC 1000000000ULL
74
75 #define INDEX_PATH "./index/%s.idx"
76
77 int opt_clock_cycles,
78 opt_clock_seconds,
79 opt_clock_date,
80 opt_clock_gmt;
81
82 uint64_t opt_clock_offset;
83 uint64_t opt_clock_offset_ns;
84
85 extern int yydebug;
86 char *opt_debug_info_dir;
87 char *opt_debug_info_target_prefix;
88
89 /*
90 * TODO: babeltrace_ctf_console_output ensures that we only print
91 * discarded events when ctf-text plugin is used. Should be cleaned up
92 * with the plugin system redesign.
93 */
94 int babeltrace_ctf_console_output;
95
96 static
97 struct bt_trace_descriptor *ctf_open_trace(const char *path, int flags,
98 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
99 int whence),
100 FILE *metadata_fp);
101 static
102 struct bt_trace_descriptor *ctf_open_mmap_trace(
103 struct bt_mmap_stream_list *mmap_list,
104 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
105 int whence),
106 FILE *metadata_fp);
107 static
108 void ctf_set_context(struct bt_trace_descriptor *descriptor,
109 struct bt_context *ctx);
110 static
111 void ctf_set_handle(struct bt_trace_descriptor *descriptor,
112 struct bt_trace_handle *handle);
113
114 static
115 int ctf_close_trace(struct bt_trace_descriptor *descriptor);
116 static
117 uint64_t ctf_timestamp_begin(struct bt_trace_descriptor *descriptor,
118 struct bt_trace_handle *handle, enum bt_clock_type type);
119 static
120 uint64_t ctf_timestamp_end(struct bt_trace_descriptor *descriptor,
121 struct bt_trace_handle *handle, enum bt_clock_type type);
122 static
123 int ctf_convert_index_timestamp(struct bt_trace_descriptor *tdp);
124
125 static
126 rw_dispatch read_dispatch_table[] = {
127 [ CTF_TYPE_INTEGER ] = ctf_integer_read,
128 [ CTF_TYPE_FLOAT ] = ctf_float_read,
129 [ CTF_TYPE_ENUM ] = ctf_enum_read,
130 [ CTF_TYPE_STRING ] = ctf_string_read,
131 [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
132 [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
133 [ CTF_TYPE_ARRAY ] = ctf_array_read,
134 [ CTF_TYPE_SEQUENCE ] = ctf_sequence_read,
135 };
136
137 static
138 rw_dispatch write_dispatch_table[] = {
139 [ CTF_TYPE_INTEGER ] = ctf_integer_write,
140 [ CTF_TYPE_FLOAT ] = ctf_float_write,
141 [ CTF_TYPE_ENUM ] = ctf_enum_write,
142 [ CTF_TYPE_STRING ] = ctf_string_write,
143 [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
144 [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
145 [ CTF_TYPE_ARRAY ] = ctf_array_write,
146 [ CTF_TYPE_SEQUENCE ] = ctf_sequence_write,
147 };
148
149 static
150 struct bt_format ctf_format = {
151 .open_trace = ctf_open_trace,
152 .open_mmap_trace = ctf_open_mmap_trace,
153 .close_trace = ctf_close_trace,
154 .set_context = ctf_set_context,
155 .set_handle = ctf_set_handle,
156 .timestamp_begin = ctf_timestamp_begin,
157 .timestamp_end = ctf_timestamp_end,
158 .convert_index_timestamp = ctf_convert_index_timestamp,
159 };
160
161 static
162 uint64_t ctf_timestamp_begin(struct bt_trace_descriptor *descriptor,
163 struct bt_trace_handle *handle, enum bt_clock_type type)
164 {
165 struct ctf_trace *tin;
166 uint64_t begin = ULLONG_MAX;
167 int i, j;
168
169 tin = container_of(descriptor, struct ctf_trace, parent);
170
171 if (!tin)
172 goto error;
173
174 /* for each stream_class */
175 for (i = 0; i < tin->streams->len; i++) {
176 struct ctf_stream_declaration *stream_class;
177
178 stream_class = g_ptr_array_index(tin->streams, i);
179 if (!stream_class)
180 continue;
181 /* for each file_stream */
182 for (j = 0; j < stream_class->streams->len; j++) {
183 struct ctf_stream_definition *stream;
184 struct ctf_file_stream *cfs;
185 struct ctf_stream_pos *stream_pos;
186 struct packet_index *index;
187
188 stream = g_ptr_array_index(stream_class->streams, j);
189 cfs = container_of(stream, struct ctf_file_stream,
190 parent);
191 stream_pos = &cfs->pos;
192
193 if (!stream_pos->packet_index)
194 goto error;
195
196 if (stream_pos->packet_index->len <= 0)
197 continue;
198
199 index = &g_array_index(stream_pos->packet_index,
200 struct packet_index,
201 stream_pos->packet_index->len - 1);
202 if (type == BT_CLOCK_REAL) {
203 if (index->ts_real.timestamp_begin < begin)
204 begin = index->ts_real.timestamp_begin;
205 } else if (type == BT_CLOCK_CYCLES) {
206 if (index->ts_cycles.timestamp_begin < begin)
207 begin = index->ts_cycles.timestamp_begin;
208 } else {
209 goto error;
210 }
211 }
212 }
213
214 return begin;
215
216 error:
217 return -1ULL;
218 }
219
220 static
221 uint64_t ctf_timestamp_end(struct bt_trace_descriptor *descriptor,
222 struct bt_trace_handle *handle, enum bt_clock_type type)
223 {
224 struct ctf_trace *tin;
225 uint64_t end = 0;
226 int i, j;
227
228 tin = container_of(descriptor, struct ctf_trace, parent);
229
230 if (!tin)
231 goto error;
232
233 /* for each stream_class */
234 for (i = 0; i < tin->streams->len; i++) {
235 struct ctf_stream_declaration *stream_class;
236
237 stream_class = g_ptr_array_index(tin->streams, i);
238 if (!stream_class)
239 continue;
240 /* for each file_stream */
241 for (j = 0; j < stream_class->streams->len; j++) {
242 struct ctf_stream_definition *stream;
243 struct ctf_file_stream *cfs;
244 struct ctf_stream_pos *stream_pos;
245 struct packet_index *index;
246
247 stream = g_ptr_array_index(stream_class->streams, j);
248 cfs = container_of(stream, struct ctf_file_stream,
249 parent);
250 stream_pos = &cfs->pos;
251
252 if (!stream_pos->packet_index)
253 goto error;
254
255 if (stream_pos->packet_index->len <= 0)
256 continue;
257
258 index = &g_array_index(stream_pos->packet_index,
259 struct packet_index,
260 stream_pos->packet_index->len - 1);
261 if (type == BT_CLOCK_REAL) {
262 if (index->ts_real.timestamp_end > end)
263 end = index->ts_real.timestamp_end;
264 } else if (type == BT_CLOCK_CYCLES) {
265 if (index->ts_cycles.timestamp_end > end)
266 end = index->ts_cycles.timestamp_end;
267 } else {
268 goto error;
269 }
270 }
271 }
272
273 return end;
274
275 error:
276 return -1ULL;
277 }
278
279 /*
280 * Update stream current timestamp
281 */
282 static
283 void ctf_update_timestamp(struct ctf_stream_definition *stream,
284 struct definition_integer *integer_definition)
285 {
286 struct declaration_integer *integer_declaration =
287 integer_definition->declaration;
288 uint64_t oldval, newval, updateval;
289
290 if (unlikely(integer_declaration->len == 64)) {
291 stream->cycles_timestamp = integer_definition->value._unsigned;
292 stream->real_timestamp = ctf_get_real_timestamp(stream,
293 stream->cycles_timestamp);
294 return;
295 }
296 /* keep low bits */
297 oldval = stream->cycles_timestamp;
298 oldval &= (1ULL << integer_declaration->len) - 1;
299 newval = integer_definition->value._unsigned;
300 /* Test for overflow by comparing low bits */
301 if (newval < oldval)
302 newval += 1ULL << integer_declaration->len;
303 /* updateval contains old high bits, and new low bits (sum) */
304 updateval = stream->cycles_timestamp;
305 updateval &= ~((1ULL << integer_declaration->len) - 1);
306 updateval += newval;
307 stream->cycles_timestamp = updateval;
308
309 /* convert to real timestamp */
310 stream->real_timestamp = ctf_get_real_timestamp(stream,
311 stream->cycles_timestamp);
312 }
313
314 /*
315 * Print timestamp, rescaling clock frequency to nanoseconds and
316 * applying offsets as needed (unix time).
317 */
318 static
319 void ctf_print_timestamp_real(FILE *fp,
320 struct ctf_stream_definition *stream,
321 uint64_t timestamp)
322 {
323 uint64_t ts_sec = 0, ts_nsec;
324
325 ts_nsec = timestamp;
326
327 /* Add command-line offset in ns*/
328 ts_nsec += opt_clock_offset_ns;
329
330 /* Add command-line offset */
331 ts_sec += opt_clock_offset;
332
333 ts_sec += ts_nsec / NSEC_PER_SEC;
334 ts_nsec = ts_nsec % NSEC_PER_SEC;
335
336 if (!opt_clock_seconds) {
337 struct tm tm;
338 time_t time_s = (time_t) ts_sec;
339
340 if (!opt_clock_gmt) {
341 struct tm *res;
342
343 res = localtime_r(&time_s, &tm);
344 if (!res) {
345 fprintf(stderr, "[warning] Unable to get localtime.\n");
346 goto seconds;
347 }
348 } else {
349 struct tm *res;
350
351 res = gmtime_r(&time_s, &tm);
352 if (!res) {
353 fprintf(stderr, "[warning] Unable to get gmtime.\n");
354 goto seconds;
355 }
356 }
357 if (opt_clock_date) {
358 char timestr[26];
359 size_t res;
360
361 /* Print date and time */
362 res = strftime(timestr, sizeof(timestr),
363 "%F ", &tm);
364 if (!res) {
365 fprintf(stderr, "[warning] Unable to print ascii time.\n");
366 goto seconds;
367 }
368 fprintf(fp, "%s", timestr);
369 }
370 /* Print time in HH:MM:SS.ns */
371 fprintf(fp, "%02d:%02d:%02d.%09" PRIu64,
372 tm.tm_hour, tm.tm_min, tm.tm_sec, ts_nsec);
373 goto end;
374 }
375 seconds:
376 fprintf(fp, "%3" PRIu64 ".%09" PRIu64,
377 ts_sec, ts_nsec);
378
379 end:
380 return;
381 }
382
383 /*
384 * Print timestamp, in cycles
385 */
386 static
387 void ctf_print_timestamp_cycles(FILE *fp,
388 struct ctf_stream_definition *stream,
389 uint64_t timestamp)
390 {
391 fprintf(fp, "%020" PRIu64, timestamp);
392 }
393
394 void ctf_print_timestamp(FILE *fp,
395 struct ctf_stream_definition *stream,
396 uint64_t timestamp)
397 {
398 if (opt_clock_cycles) {
399 ctf_print_timestamp_cycles(fp, stream, timestamp);
400 } else {
401 ctf_print_timestamp_real(fp, stream, timestamp);
402 }
403 }
404
405 static
406 void print_uuid(FILE *fp, unsigned char *uuid)
407 {
408 int i;
409
410 for (i = 0; i < BABELTRACE_UUID_LEN; i++)
411 fprintf(fp, "%x", (unsigned int) uuid[i]);
412 }
413
414 /*
415 * Discarded events can be either:
416 * - discarded after end of previous buffer due to buffer full:
417 * happened within range: [ prev_timestamp_end, timestamp_begin ]
418 * - discarded within current buffer due to either event too large or
419 * nested wrap-around:
420 * happened within range: [ timestamp_begin, timestamp_end ]
421 *
422 * Given we have discarded counters of those two types merged into the
423 * events_discarded counter, we need to use the union of those ranges:
424 * [ prev_timestamp_end, timestamp_end ]
425 *
426 * Lost packets occur if the tracer overwrote some subbuffer(s) before the
427 * consumer had time to extract them. We keep track of those gaps with the
428 * packet sequence number in each packet.
429 */
430 void ctf_print_discarded_lost(FILE *fp, struct ctf_stream_definition *stream)
431 {
432 if ((!stream->events_discarded && !stream->packets_lost) ||
433 !babeltrace_ctf_console_output) {
434 return;
435 }
436 fflush(stdout);
437 if (stream->events_discarded) {
438 fprintf(fp, "[warning] Tracer discarded %" PRIu64 " events between [",
439 stream->events_discarded);
440 } else if (stream->packets_lost) {
441 fprintf(fp, "[warning] Tracer lost %" PRIu64 " trace packets between [",
442 stream->packets_lost);
443 }
444 if (opt_clock_cycles) {
445 ctf_print_timestamp(fp, stream,
446 stream->prev.cycles.end);
447 fprintf(fp, "] and [");
448 ctf_print_timestamp(fp, stream,
449 stream->current.cycles.end);
450 } else {
451 ctf_print_timestamp(fp, stream,
452 stream->prev.real.end);
453 fprintf(fp, "] and [");
454 ctf_print_timestamp(fp, stream,
455 stream->current.real.end);
456 }
457 fprintf(fp, "] in trace UUID ");
458 print_uuid(fp, stream->stream_class->trace->uuid);
459 if (stream->stream_class->trace->parent.path[0])
460 fprintf(fp, ", at path: \"%s\"",
461 stream->stream_class->trace->parent.path);
462
463 fprintf(fp, ", within stream id %" PRIu64, stream->stream_id);
464 if (stream->path[0])
465 fprintf(fp, ", at relative path: \"%s\"", stream->path);
466 fprintf(fp, ". ");
467 fprintf(fp, "You should consider recording a new trace with larger "
468 "buffers or with fewer events enabled.\n");
469 fflush(fp);
470 }
471
472 static
473 int ctf_read_event(struct bt_stream_pos *ppos, struct ctf_stream_definition *stream)
474 {
475 struct ctf_stream_pos *pos =
476 container_of(ppos, struct ctf_stream_pos, parent);
477 struct ctf_stream_declaration *stream_class = stream->stream_class;
478 struct ctf_event_definition *event;
479 uint64_t id = 0;
480 int ret;
481
482 /* We need to check for EOF here for empty files. */
483 if (unlikely(pos->offset == EOF))
484 return EOF;
485
486 if (ctf_pos_get_event(pos))
487 return EOF;
488
489 /* save the current position as a restore point */
490 pos->last_offset = pos->offset;
491
492 /*
493 * This is the EOF check after we've advanced the position in
494 * ctf_pos_get_event.
495 */
496 if (unlikely(pos->offset == EOF))
497 return EOF;
498
499 /* Stream is inactive for now (live reading). */
500 if (unlikely(pos->content_size == 0))
501 return EAGAIN;
502
503 /*
504 * Packet seeked to by ctf_pos_get_event() only contains
505 * headers, no event. Consider stream as inactive (live
506 * reading).
507 */
508 if (unlikely(pos->data_offset == pos->content_size))
509 return EAGAIN;
510
511 assert(pos->offset < pos->content_size);
512
513 /* Read event header */
514 if (likely(stream->stream_event_header)) {
515 struct definition_integer *integer_definition;
516 struct bt_definition *variant;
517
518 ret = generic_rw(ppos, &stream->stream_event_header->p);
519 if (unlikely(ret))
520 goto error;
521 /* lookup event id */
522 integer_definition = bt_lookup_integer(&stream->stream_event_header->p, "id", FALSE);
523 if (integer_definition) {
524 id = integer_definition->value._unsigned;
525 } else {
526 struct definition_enum *enum_definition;
527
528 enum_definition = bt_lookup_enum(&stream->stream_event_header->p, "id", FALSE);
529 if (enum_definition) {
530 id = enum_definition->integer->value._unsigned;
531 }
532 }
533
534 variant = bt_lookup_variant(&stream->stream_event_header->p, "v");
535 if (variant) {
536 integer_definition = bt_lookup_integer(variant, "id", FALSE);
537 if (integer_definition) {
538 id = integer_definition->value._unsigned;
539 }
540 }
541 stream->event_id = id;
542
543 /* lookup timestamp */
544 stream->has_timestamp = 0;
545 integer_definition = bt_lookup_integer(&stream->stream_event_header->p, "timestamp", FALSE);
546 if (integer_definition) {
547 ctf_update_timestamp(stream, integer_definition);
548 stream->has_timestamp = 1;
549 } else {
550 if (variant) {
551 integer_definition = bt_lookup_integer(variant, "timestamp", FALSE);
552 if (integer_definition) {
553 ctf_update_timestamp(stream, integer_definition);
554 stream->has_timestamp = 1;
555 }
556 }
557 }
558 }
559
560 /* Read stream-declared event context */
561 if (stream->stream_event_context) {
562 ret = generic_rw(ppos, &stream->stream_event_context->p);
563 if (ret)
564 goto error;
565 }
566
567 if (unlikely(id >= stream_class->events_by_id->len)) {
568 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
569 return -EINVAL;
570 }
571 event = g_ptr_array_index(stream->events_by_id, id);
572 if (unlikely(!event)) {
573 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
574 return -EINVAL;
575 }
576
577 /* Read event-declared event context */
578 if (event->event_context) {
579 ret = generic_rw(ppos, &event->event_context->p);
580 if (ret)
581 goto error;
582 }
583
584 /* Read event payload */
585 if (likely(event->event_fields)) {
586 ret = generic_rw(ppos, &event->event_fields->p);
587 if (ret)
588 goto error;
589 }
590
591 if (pos->last_offset == pos->offset) {
592 fprintf(stderr, "[error] Invalid 0 byte event encountered.\n");
593 return -EINVAL;
594 }
595
596 return 0;
597
598 error:
599 fprintf(stderr, "[error] Unexpected end of packet. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
600 return ret;
601 }
602
603 static
604 int ctf_write_event(struct bt_stream_pos *pos, struct ctf_stream_definition *stream)
605 {
606 struct ctf_stream_declaration *stream_class = stream->stream_class;
607 struct ctf_event_definition *event;
608 uint64_t id;
609 int ret;
610
611 id = stream->event_id;
612
613 /* print event header */
614 if (likely(stream->stream_event_header)) {
615 ret = generic_rw(pos, &stream->stream_event_header->p);
616 if (ret)
617 goto error;
618 }
619
620 /* print stream-declared event context */
621 if (stream->stream_event_context) {
622 ret = generic_rw(pos, &stream->stream_event_context->p);
623 if (ret)
624 goto error;
625 }
626
627 if (unlikely(id >= stream_class->events_by_id->len)) {
628 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
629 return -EINVAL;
630 }
631 event = g_ptr_array_index(stream->events_by_id, id);
632 if (unlikely(!event)) {
633 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
634 return -EINVAL;
635 }
636
637 /* print event-declared event context */
638 if (event->event_context) {
639 ret = generic_rw(pos, &event->event_context->p);
640 if (ret)
641 goto error;
642 }
643
644 /* Read and print event payload */
645 if (likely(event->event_fields)) {
646 ret = generic_rw(pos, &event->event_fields->p);
647 if (ret)
648 goto error;
649 }
650
651 return 0;
652
653 error:
654 fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
655 return ret;
656 }
657
658 /*
659 * One side-effect of this function is to unmap pos mmap base if one is
660 * mapped.
661 */
662 static
663 int find_data_offset(struct ctf_stream_pos *pos,
664 struct ctf_file_stream *file_stream,
665 struct packet_index *packet_index)
666 {
667 uint64_t packet_map_len = DEFAULT_HEADER_LEN, tmp_map_len;
668 struct stat filestats;
669 size_t filesize;
670 int ret;
671
672 pos = &file_stream->pos;
673
674 ret = fstat(pos->fd, &filestats);
675 if (ret < 0)
676 return ret;
677 filesize = filestats.st_size;
678
679 /* Deal with empty files */
680 if (!filesize) {
681 return 0;
682 }
683
684 begin:
685 if (filesize - pos->mmap_offset < (packet_map_len >> LOG2_CHAR_BIT)) {
686 packet_map_len = (filesize - pos->mmap_offset) << LOG2_CHAR_BIT;
687 }
688
689 if (pos->base_mma) {
690 /* unmap old base */
691 ret = munmap_align(pos->base_mma);
692 if (ret) {
693 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
694 strerror(errno));
695 return ret;
696 }
697 pos->base_mma = NULL;
698 }
699 /* map new base. Need mapping length from header. */
700 pos->base_mma = mmap_align(packet_map_len >> LOG2_CHAR_BIT, PROT_READ,
701 MAP_PRIVATE, pos->fd, pos->mmap_offset);
702 assert(pos->base_mma != MAP_FAILED);
703
704 pos->content_size = packet_map_len;
705 pos->packet_size = packet_map_len;
706 pos->offset = 0; /* Position of the packet header */
707
708 /* update trace_packet_header and stream_packet_context */
709 if (pos->prot == PROT_READ && file_stream->parent.trace_packet_header) {
710 /* Read packet header */
711 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
712 if (ret) {
713 if (ret == -EFAULT)
714 goto retry;
715 }
716 }
717 if (pos->prot == PROT_READ && file_stream->parent.stream_packet_context) {
718 /* Read packet context */
719 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
720 if (ret) {
721 if (ret == -EFAULT)
722 goto retry;
723 }
724 }
725 packet_index->data_offset = pos->offset;
726
727 /* unmap old base */
728 ret = munmap_align(pos->base_mma);
729 if (ret) {
730 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
731 strerror(errno));
732 return ret;
733 }
734 pos->base_mma = NULL;
735
736 return 0;
737
738 /* Retry with larger mapping */
739 retry:
740 if (packet_map_len == ((filesize - pos->mmap_offset) << LOG2_CHAR_BIT)) {
741 /*
742 * Reached EOF, but still expecting header/context data.
743 */
744 fprintf(stderr, "[error] Reached end of file, but still expecting header or context fields.\n");
745 return -EFAULT;
746 }
747 /* Double the mapping len, and retry */
748 tmp_map_len = packet_map_len << 1;
749 if (tmp_map_len >> 1 != packet_map_len) {
750 /* Overflow */
751 fprintf(stderr, "[error] Packet mapping length overflow\n");
752 return -EFAULT;
753 }
754 packet_map_len = tmp_map_len;
755 goto begin;
756 }
757
758
759 int ctf_init_pos(struct ctf_stream_pos *pos, struct bt_trace_descriptor *trace,
760 int fd, int open_flags)
761 {
762 pos->fd = fd;
763 if (fd >= 0) {
764 pos->packet_index = g_array_new(FALSE, TRUE,
765 sizeof(struct packet_index));
766 } else {
767 pos->packet_index = NULL;
768 }
769 switch (open_flags & O_ACCMODE) {
770 case O_RDONLY:
771 pos->prot = PROT_READ;
772 pos->flags = MAP_PRIVATE;
773 pos->parent.rw_table = read_dispatch_table;
774 pos->parent.event_cb = ctf_read_event;
775 pos->parent.trace = trace;
776 break;
777 case O_RDWR:
778 pos->prot = PROT_READ | PROT_WRITE;
779 pos->flags = MAP_SHARED;
780 pos->parent.rw_table = write_dispatch_table;
781 pos->parent.event_cb = ctf_write_event;
782 pos->parent.trace = trace;
783 if (fd >= 0)
784 ctf_packet_seek(&pos->parent, 0, SEEK_SET); /* position for write */
785 break;
786 default:
787 assert(0);
788 }
789 return 0;
790 }
791
792 int ctf_fini_pos(struct ctf_stream_pos *pos)
793 {
794 if ((pos->prot & PROT_WRITE) && pos->content_size_loc)
795 *pos->content_size_loc = pos->offset;
796 if (pos->base_mma) {
797 int ret;
798
799 /* unmap old base */
800 ret = munmap_align(pos->base_mma);
801 if (ret) {
802 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
803 strerror(errno));
804 return -1;
805 }
806 }
807 if (pos->packet_index)
808 (void) g_array_free(pos->packet_index, TRUE);
809 return 0;
810 }
811
812 void ctf_update_current_packet_index(struct ctf_stream_definition *stream,
813 struct packet_index *prev_index,
814 struct packet_index *cur_index)
815 {
816 uint64_t events_discarded_diff;
817 uint64_t packets_lost_diff = 0;
818
819 /* Update packet index time information */
820
821 /* Current packet begin/end */
822 stream->current.real.begin =
823 cur_index->ts_real.timestamp_begin;
824 stream->current.cycles.begin =
825 cur_index->ts_cycles.timestamp_begin;
826 stream->current.real.end =
827 cur_index->ts_real.timestamp_end;
828 stream->current.cycles.end =
829 cur_index->ts_cycles.timestamp_end;
830
831 /* Update packet index discarded event information */
832 events_discarded_diff = cur_index->events_discarded;
833 if (prev_index) {
834 /* Previous packet begin/end */
835 stream->prev.cycles.begin =
836 prev_index->ts_cycles.timestamp_begin;
837 stream->prev.real.begin =
838 prev_index->ts_real.timestamp_begin;
839 stream->prev.cycles.end =
840 prev_index->ts_cycles.timestamp_end;
841 stream->prev.real.end =
842 prev_index->ts_real.timestamp_end;
843
844 events_discarded_diff -= prev_index->events_discarded;
845 /* packet_seq_num stays at 0 if not produced by the tracer */
846 if (cur_index->packet_seq_num) {
847 packets_lost_diff = cur_index->packet_seq_num -
848 prev_index->packet_seq_num - 1;
849 }
850 /*
851 * Deal with 32-bit wrap-around if the tracer provided a
852 * 32-bit field.
853 */
854 if (prev_index->events_discarded_len == 32) {
855 events_discarded_diff = (uint32_t) events_discarded_diff;
856 }
857 } else {
858 /*
859 * First packet: use current packet info as limits for
860 * previous packet.
861 */
862 stream->prev.cycles.begin =
863 stream->prev.cycles.end =
864 stream->current.cycles.begin;
865 stream->prev.real.begin =
866 stream->prev.real.end =
867 stream->current.real.begin;
868 }
869 stream->events_discarded = events_discarded_diff;
870 stream->packets_lost = packets_lost_diff;
871 }
872
873 /*
874 * Find the timerange where all the streams in the trace are active
875 * simultaneously.
876 *
877 * Return 0 and update begin/end if necessary on success, return 1 for
878 * empty streams and return a negative value on error.
879 */
880 static
881 int ctf_find_stream_intersection(struct bt_trace_descriptor *td_read,
882 struct packet_index_time *_real,
883 struct packet_index_time *_cycles)
884 {
885 int stream_id, ret = 0;
886 struct packet_index_time real = { 0, UINT64_MAX },
887 cycles = { 0, UINT64_MAX };
888 struct ctf_trace *tin = container_of(td_read, struct ctf_trace, parent);
889
890 /* At least one of the two return args must be provided. */
891 if (!_real && !_cycles) {
892 ret = -1;
893 goto end;
894 }
895
896 if (tin->streams->len == 0) {
897 ret = 1;
898 goto end;
899 }
900
901 for (stream_id = 0; stream_id < tin->streams->len;
902 stream_id++) {
903 int filenr;
904 struct ctf_stream_declaration *stream_class;
905
906 stream_class = g_ptr_array_index(tin->streams, stream_id);
907 if (!stream_class) {
908 continue;
909 }
910 for (filenr = 0; filenr < stream_class->streams->len; filenr++) {
911 struct ctf_file_stream *file_stream;
912 struct ctf_stream_pos *stream_pos;
913 struct packet_index *index;
914
915 file_stream = g_ptr_array_index(stream_class->streams,
916 filenr);
917 if (!file_stream) {
918 continue;
919 }
920 stream_pos = &file_stream->pos;
921 if (!stream_pos->packet_index ||
922 stream_pos->packet_index->len <= 0) {
923 ret = 1;
924 goto end;
925 }
926 index = &g_array_index(stream_pos->packet_index,
927 struct packet_index, 0);
928 real.timestamp_begin = max(real.timestamp_begin,
929 index->ts_real.timestamp_begin);
930 cycles.timestamp_begin = max(cycles.timestamp_begin,
931 index->ts_cycles.timestamp_begin);
932
933 index = &g_array_index(stream_pos->packet_index,
934 struct packet_index,
935 stream_pos->packet_index->len - 1);
936 real.timestamp_end = min(real.timestamp_end,
937 index->ts_real.timestamp_end);
938 cycles.timestamp_end = min(cycles.timestamp_end,
939 index->ts_cycles.timestamp_end);
940 }
941 }
942 end:
943 if (ret == 0) {
944 if (_real) {
945 *_real = real;
946 }
947 if (_cycles) {
948 *_cycles = cycles;
949 }
950 }
951 return ret;
952 }
953
954 /*
955 * Find the union of all active regions in the trace collection's traces.
956 * Returns "real" timestamps.
957 *
958 * Return 0 on success.
959 * Return 1 if no intersections are found.
960 * Return a negative value on error.
961 */
962 int ctf_find_tc_stream_packet_intersection_union(struct bt_context *ctx,
963 uint64_t *_ts_begin, uint64_t *_ts_end)
964 {
965 int ret = 0, i;
966 uint64_t ts_begin = UINT64_MAX, ts_end = 0;
967
968 if (!ctx || !ctx->tc || !ctx->tc->array || !_ts_begin || !_ts_end) {
969 ret = -EINVAL;
970 goto end;
971 }
972
973 for (i = 0; i < ctx->tc->array->len; i++) {
974 struct bt_trace_descriptor *td_read;
975 struct packet_index_time intersection_real;
976
977 td_read = g_ptr_array_index(ctx->tc->array, i);
978 if (!td_read) {
979 continue;
980 }
981 ret = ctf_find_stream_intersection(td_read, &intersection_real,
982 NULL);
983 if (ret == 1) {
984 /* Empty trace or no stream intersection. */
985 continue;
986 } else if (ret < 0) {
987 goto end;
988 }
989
990 ts_begin = min(intersection_real.timestamp_begin, ts_begin);
991 ts_end = max(intersection_real.timestamp_end, ts_end);
992 }
993
994 if (ts_end < ts_begin) {
995 ret = 1;
996 goto end;
997 }
998 *_ts_begin = ts_begin;
999 *_ts_end = ts_end;
1000 end:
1001 return ret;
1002 }
1003
1004 int ctf_tc_set_stream_intersection_mode(struct bt_context *ctx)
1005 {
1006 int ret = 0, i;
1007
1008 if (!ctx || !ctx->tc || !ctx->tc->array) {
1009 ret = -EINVAL;
1010 goto end;
1011 }
1012
1013 for (i = 0; i < ctx->tc->array->len; i++) {
1014 struct bt_trace_descriptor *td_read;
1015 struct packet_index_time intersection_real;
1016
1017 td_read = g_ptr_array_index(ctx->tc->array, i);
1018 if (!td_read) {
1019 continue;
1020 }
1021
1022 ret = ctf_find_stream_intersection(td_read, &intersection_real,
1023 NULL);
1024 if (ret == 1) {
1025 /* Empty trace or no stream intersection. */
1026 continue;
1027 } else if (ret < 0) {
1028 goto end;
1029 }
1030
1031 td_read->interval_real = intersection_real;
1032 td_read->interval_set = true;
1033 }
1034 end:
1035 return ret;
1036 }
1037
1038 /*
1039 * for SEEK_CUR: go to next packet.
1040 * for SEEK_SET: go to packet numer (index).
1041 */
1042 void ctf_packet_seek(struct bt_stream_pos *stream_pos, size_t index, int whence)
1043 {
1044 struct ctf_stream_pos *pos =
1045 container_of(stream_pos, struct ctf_stream_pos, parent);
1046 struct ctf_file_stream *file_stream =
1047 container_of(pos, struct ctf_file_stream, pos);
1048 int ret;
1049 struct packet_index *packet_index, *prev_index;
1050
1051 switch (whence) {
1052 case SEEK_CUR:
1053 case SEEK_SET: /* Fall-through */
1054 break; /* OK */
1055 default:
1056 ret = -1;
1057 goto end;
1058 }
1059
1060 if ((pos->prot & PROT_WRITE) && pos->content_size_loc)
1061 *pos->content_size_loc = pos->offset;
1062
1063 if (pos->base_mma) {
1064 /* unmap old base */
1065 ret = munmap_align(pos->base_mma);
1066 if (ret) {
1067 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1068 strerror(errno));
1069 ret = -1;
1070 goto end;
1071 }
1072 pos->base_mma = NULL;
1073 }
1074
1075 /*
1076 * The caller should never ask for ctf_move_pos across packets,
1077 * except to get exactly at the beginning of the next packet.
1078 */
1079 if (pos->prot & PROT_WRITE) {
1080 switch (whence) {
1081 case SEEK_CUR:
1082 /* The writer will add padding */
1083 pos->mmap_offset += pos->packet_size / CHAR_BIT;
1084 break;
1085 case SEEK_SET:
1086 assert(index == 0); /* only seek supported for now */
1087 pos->cur_index = 0;
1088 break;
1089 default:
1090 ret = -1;
1091 goto end;
1092 }
1093 pos->content_size = -1U; /* Unknown at this point */
1094 pos->packet_size = WRITE_PACKET_LEN;
1095 do {
1096 ret = bt_posix_fallocate(pos->fd, pos->mmap_offset,
1097 pos->packet_size / CHAR_BIT);
1098 } while (ret == EINTR);
1099 assert(ret == 0);
1100 pos->offset = 0;
1101 } else {
1102 read_next_packet:
1103 switch (whence) {
1104 case SEEK_CUR:
1105 {
1106 if (pos->offset == EOF) {
1107 ret = 0;
1108 goto end;
1109 }
1110 assert(pos->cur_index < pos->packet_index->len);
1111 /* The reader will expect us to skip padding */
1112 ++pos->cur_index;
1113 break;
1114 }
1115 case SEEK_SET:
1116 if (index >= pos->packet_index->len) {
1117 pos->offset = EOF;
1118 ret = 0;
1119 goto end;
1120 }
1121 pos->cur_index = index;
1122 break;
1123 default:
1124 ret = -1;
1125 goto end;
1126 }
1127
1128 if (pos->cur_index >= pos->packet_index->len) {
1129 pos->offset = EOF;
1130 ret = 0;
1131 goto end;
1132 }
1133
1134 packet_index = &g_array_index(pos->packet_index,
1135 struct packet_index, pos->cur_index);
1136 if (pos->cur_index > 0) {
1137 prev_index = &g_array_index(pos->packet_index,
1138 struct packet_index,
1139 pos->cur_index - 1);
1140 } else {
1141 prev_index = NULL;
1142 }
1143 ctf_update_current_packet_index(&file_stream->parent,
1144 prev_index, packet_index);
1145
1146 if (pos->cur_index >= pos->packet_index->len) {
1147 pos->offset = EOF;
1148 ret = 0;
1149 goto end;
1150 }
1151
1152 /*
1153 * We need to check if we are in trace read or called
1154 * from packet indexing. In this last case, the
1155 * collection is not there, so we cannot print the
1156 * timestamps.
1157 */
1158 if ((&file_stream->parent)->stream_class->trace->parent.collection) {
1159 ctf_print_discarded_lost(stderr, &file_stream->parent);
1160 }
1161
1162 packet_index = &g_array_index(pos->packet_index,
1163 struct packet_index,
1164 pos->cur_index);
1165 file_stream->parent.cycles_timestamp = packet_index->ts_cycles.timestamp_begin;
1166
1167 file_stream->parent.real_timestamp = packet_index->ts_real.timestamp_begin;
1168
1169 /* Lookup context/packet size in index */
1170 if (packet_index->data_offset == -1) {
1171 ret = find_data_offset(pos, file_stream, packet_index);
1172 if (ret < 0) {
1173 ret = -1;
1174 goto end;
1175 }
1176 }
1177 pos->content_size = packet_index->content_size;
1178 pos->packet_size = packet_index->packet_size;
1179 pos->mmap_offset = packet_index->offset;
1180 pos->data_offset = packet_index->data_offset;
1181 if (pos->data_offset < packet_index->content_size) {
1182 pos->offset = 0; /* will read headers */
1183 } else if (pos->data_offset == packet_index->content_size) {
1184 /* empty packet */
1185 pos->offset = packet_index->data_offset;
1186 whence = SEEK_CUR;
1187 goto read_next_packet;
1188 } else {
1189 pos->offset = EOF;
1190 ret = 0;
1191 goto end;
1192 }
1193 }
1194 /* map new base. Need mapping length from header. */
1195 pos->base_mma = mmap_align(pos->packet_size / CHAR_BIT, pos->prot,
1196 pos->flags, pos->fd, pos->mmap_offset);
1197 if (pos->base_mma == MAP_FAILED) {
1198 fprintf(stderr, "[error] mmap error %s.\n",
1199 strerror(errno));
1200 assert(0);
1201 }
1202
1203 /* update trace_packet_header and stream_packet_context */
1204 if (!(pos->prot & PROT_WRITE) &&
1205 file_stream->parent.trace_packet_header) {
1206 /* Read packet header */
1207 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1208 assert(!ret);
1209 }
1210 if (!(pos->prot & PROT_WRITE) &&
1211 file_stream->parent.stream_packet_context) {
1212 /* Read packet context */
1213 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1214 assert(!ret);
1215 }
1216 ret = 0;
1217 end:
1218 bt_packet_seek_set_error(ret);
1219 }
1220
1221 static
1222 int packet_metadata(struct ctf_trace *td, FILE *fp)
1223 {
1224 uint32_t magic;
1225 size_t len;
1226 int ret = 0;
1227
1228 len = fread(&magic, sizeof(magic), 1, fp);
1229 if (len != 1) {
1230 goto end;
1231 }
1232 if (magic == TSDL_MAGIC) {
1233 ret = 1;
1234 td->byte_order = BYTE_ORDER;
1235 CTF_TRACE_SET_FIELD(td, byte_order);
1236 } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) {
1237 ret = 1;
1238 td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ?
1239 LITTLE_ENDIAN : BIG_ENDIAN;
1240 CTF_TRACE_SET_FIELD(td, byte_order);
1241 }
1242 end:
1243 rewind(fp);
1244 return ret;
1245 }
1246
1247 /*
1248 * Returns 0 on success, -1 on error.
1249 */
1250 static
1251 int check_version(unsigned int major, unsigned int minor)
1252 {
1253 switch (major) {
1254 case 1:
1255 switch (minor) {
1256 case 8:
1257 return 0;
1258 default:
1259 goto warning;
1260 }
1261 default:
1262 goto warning;
1263
1264 }
1265
1266 /* eventually return an error instead of warning */
1267 warning:
1268 fprintf(stderr, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n",
1269 major, minor);
1270 return 0;
1271 }
1272
1273 static
1274 int ctf_trace_metadata_packet_read(struct ctf_trace *td, FILE *in,
1275 FILE *out)
1276 {
1277 struct metadata_packet_header header;
1278 size_t readlen, writelen, toread;
1279 char buf[4096 + 1]; /* + 1 for debug-mode \0 */
1280 int ret = 0;
1281
1282 readlen = fread(&header, header_sizeof(header), 1, in);
1283 if (readlen < 1)
1284 return -EINVAL;
1285
1286 if (td->byte_order != BYTE_ORDER) {
1287 header.magic = GUINT32_SWAP_LE_BE(header.magic);
1288 header.checksum = GUINT32_SWAP_LE_BE(header.checksum);
1289 header.content_size = GUINT32_SWAP_LE_BE(header.content_size);
1290 header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size);
1291 }
1292 if (header.checksum)
1293 fprintf(stderr, "[warning] checksum verification not supported yet.\n");
1294 if (header.compression_scheme) {
1295 fprintf(stderr, "[error] compression (%u) not supported yet.\n",
1296 header.compression_scheme);
1297 return -EINVAL;
1298 }
1299 if (header.encryption_scheme) {
1300 fprintf(stderr, "[error] encryption (%u) not supported yet.\n",
1301 header.encryption_scheme);
1302 return -EINVAL;
1303 }
1304 if (header.checksum_scheme) {
1305 fprintf(stderr, "[error] checksum (%u) not supported yet.\n",
1306 header.checksum_scheme);
1307 return -EINVAL;
1308 }
1309 if (check_version(header.major, header.minor) < 0)
1310 return -EINVAL;
1311 if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) {
1312 memcpy(td->uuid, header.uuid, sizeof(header.uuid));
1313 CTF_TRACE_SET_FIELD(td, uuid);
1314 } else {
1315 if (bt_uuid_compare(header.uuid, td->uuid))
1316 return -EINVAL;
1317 }
1318
1319 if ((header.content_size / CHAR_BIT) < header_sizeof(header))
1320 return -EINVAL;
1321
1322 toread = (header.content_size / CHAR_BIT) - header_sizeof(header);
1323
1324 for (;;) {
1325 readlen = fread(buf, sizeof(char), min(sizeof(buf) - 1, toread), in);
1326 if (ferror(in)) {
1327 ret = -EINVAL;
1328 break;
1329 }
1330 if (babeltrace_debug) {
1331 buf[readlen] = '\0';
1332 fprintf(stderr, "[debug] metadata packet read: %s\n",
1333 buf);
1334 }
1335
1336 writelen = fwrite(buf, sizeof(char), readlen, out);
1337 if (writelen < readlen) {
1338 ret = -EIO;
1339 break;
1340 }
1341 if (ferror(out)) {
1342 ret = -EINVAL;
1343 break;
1344 }
1345 toread -= readlen;
1346 if (!toread) {
1347 ret = 0; /* continue reading next packet */
1348 goto read_padding;
1349 }
1350 }
1351 return ret;
1352
1353 read_padding:
1354 toread = (header.packet_size - header.content_size) / CHAR_BIT;
1355 ret = fseek(in, toread, SEEK_CUR);
1356 if (ret < 0) {
1357 fprintf(stderr, "[warning] Missing padding at end of file\n");
1358 ret = 0;
1359 }
1360 return ret;
1361 }
1362
1363 static
1364 int ctf_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
1365 char **buf)
1366 {
1367 FILE *in, *out;
1368 size_t size, buflen;
1369 int ret;
1370
1371 in = *fp;
1372 /*
1373 * Using strlen on *buf instead of size of open_memstream
1374 * because its size includes garbage at the end (after final
1375 * \0). This is the allocated size, not the actual string size.
1376 */
1377 out = babeltrace_open_memstream(buf, &size);
1378 if (out == NULL) {
1379 perror("Metadata open_memstream");
1380 return -errno;
1381 }
1382 for (;;) {
1383 ret = ctf_trace_metadata_packet_read(td, in, out);
1384 if (ret) {
1385 break;
1386 }
1387 if (feof(in)) {
1388 ret = 0;
1389 break;
1390 }
1391 }
1392 /* close to flush the buffer */
1393 ret = babeltrace_close_memstream(buf, &size, out);
1394 if (ret < 0) {
1395 int closeret;
1396
1397 perror("babeltrace_flush_memstream");
1398 ret = -errno;
1399 closeret = fclose(in);
1400 if (closeret) {
1401 perror("Error in fclose");
1402 }
1403 return ret;
1404 }
1405 ret = fclose(in);
1406 if (ret) {
1407 perror("Error in fclose");
1408 }
1409 /* open for reading */
1410 buflen = strlen(*buf);
1411 if (!buflen) {
1412 *fp = NULL;
1413 return -ENOENT;
1414 }
1415 *fp = babeltrace_fmemopen(*buf, buflen, "rb");
1416 if (!*fp) {
1417 perror("Metadata fmemopen");
1418 return -errno;
1419 }
1420 return 0;
1421 }
1422
1423 static
1424 int ctf_trace_metadata_read(struct ctf_trace *td, FILE *metadata_fp,
1425 struct ctf_scanner *scanner, int append)
1426 {
1427 struct ctf_file_stream *metadata_stream;
1428 FILE *fp;
1429 char *buf = NULL;
1430 int ret = 0, closeret;
1431
1432 metadata_stream = g_new0(struct ctf_file_stream, 1);
1433 metadata_stream->pos.last_offset = LAST_OFFSET_POISON;
1434
1435 if (metadata_fp) {
1436 fp = metadata_fp;
1437 metadata_stream->pos.fd = -1;
1438 } else {
1439 td->metadata = &metadata_stream->parent;
1440 metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
1441 if (metadata_stream->pos.fd < 0) {
1442 fprintf(stderr, "Unable to open metadata.\n");
1443 ret = -1;
1444 goto end_free;
1445 }
1446
1447 fp = fdopen(metadata_stream->pos.fd, "r");
1448 if (!fp) {
1449 fprintf(stderr, "[error] Unable to open metadata stream.\n");
1450 perror("Metadata stream open");
1451 ret = -errno;
1452 goto end_stream;
1453 }
1454 /* fd now belongs to fp */
1455 metadata_stream->pos.fd = -1;
1456 }
1457 if (babeltrace_debug)
1458 yydebug = 1;
1459
1460 if (packet_metadata(td, fp)) {
1461 ret = ctf_trace_metadata_stream_read(td, &fp, &buf);
1462 if (ret) {
1463 goto end;
1464 }
1465 td->metadata_string = buf;
1466 td->metadata_packetized = 1;
1467 } else {
1468 if (!append) {
1469 unsigned int major, minor;
1470 ssize_t nr_items;
1471
1472 td->byte_order = BYTE_ORDER;
1473
1474 /* Check text-only metadata header and version */
1475 nr_items = fscanf(fp, "/* CTF %10u.%10u", &major, &minor);
1476 if (nr_items < 2)
1477 fprintf(stderr, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
1478 if (check_version(major, minor) < 0) {
1479 ret = -EINVAL;
1480 goto end;
1481 }
1482 rewind(fp);
1483 }
1484 }
1485
1486 ret = ctf_scanner_append_ast(scanner, fp);
1487 if (ret) {
1488 fprintf(stderr, "[error] Error creating AST\n");
1489 goto end;
1490 }
1491
1492 if (babeltrace_debug) {
1493 ret = ctf_visitor_print_xml(stderr, 0, &scanner->ast->root);
1494 if (ret) {
1495 fprintf(stderr, "[error] Error visiting AST for XML output\n");
1496 goto end;
1497 }
1498 }
1499
1500 ret = ctf_visitor_semantic_check(stderr, 0, &scanner->ast->root);
1501 if (ret) {
1502 fprintf(stderr, "[error] Error in CTF semantic validation %d\n", ret);
1503 goto end;
1504 }
1505 ret = ctf_visitor_construct_metadata(stderr, 0, &scanner->ast->root,
1506 td, td->byte_order);
1507 if (ret) {
1508 fprintf(stderr, "[error] Error in CTF metadata constructor %d\n", ret);
1509 goto end;
1510 }
1511 end:
1512 if (fp) {
1513 closeret = fclose(fp);
1514 if (closeret) {
1515 perror("Error on fclose");
1516 }
1517 }
1518 end_stream:
1519 if (metadata_stream->pos.fd >= 0) {
1520 closeret = close(metadata_stream->pos.fd);
1521 if (closeret) {
1522 perror("Error on metadata stream fd close");
1523 }
1524 }
1525 end_free:
1526 if (ret)
1527 g_free(metadata_stream);
1528 return ret;
1529 }
1530
1531 static
1532 struct ctf_event_definition *create_event_definitions(struct ctf_trace *td,
1533 struct ctf_stream_definition *stream,
1534 struct ctf_event_declaration *event)
1535 {
1536 struct ctf_event_definition *stream_event = g_new0(struct ctf_event_definition, 1);
1537
1538 if (event->context_decl) {
1539 struct bt_definition *definition =
1540 event->context_decl->p.definition_new(&event->context_decl->p,
1541 stream->parent_def_scope, 0, 0, "event.context");
1542 if (!definition) {
1543 goto error;
1544 }
1545 stream_event->event_context = container_of(definition,
1546 struct definition_struct, p);
1547 stream->parent_def_scope = stream_event->event_context->p.scope;
1548 }
1549 if (event->fields_decl) {
1550 struct bt_definition *definition =
1551 event->fields_decl->p.definition_new(&event->fields_decl->p,
1552 stream->parent_def_scope, 0, 0, "event.fields");
1553 if (!definition) {
1554 goto error;
1555 }
1556 stream_event->event_fields = container_of(definition,
1557 struct definition_struct, p);
1558 stream->parent_def_scope = stream_event->event_fields->p.scope;
1559 }
1560 stream_event->stream = stream;
1561 return stream_event;
1562
1563 error:
1564 if (stream_event->event_fields)
1565 bt_definition_unref(&stream_event->event_fields->p);
1566 if (stream_event->event_context)
1567 bt_definition_unref(&stream_event->event_context->p);
1568 fprintf(stderr, "[error] Unable to create event definition for event \"%s\".\n",
1569 g_quark_to_string(event->name));
1570 return NULL;
1571 }
1572
1573 static
1574 int copy_event_declarations_stream_class_to_stream(struct ctf_trace *td,
1575 struct ctf_stream_declaration *stream_class,
1576 struct ctf_stream_definition *stream)
1577 {
1578 size_t def_size, class_size, i;
1579 int ret = 0;
1580
1581 def_size = stream->events_by_id->len;
1582 class_size = stream_class->events_by_id->len;
1583
1584 g_ptr_array_set_size(stream->events_by_id, class_size);
1585 for (i = def_size; i < class_size; i++) {
1586 struct ctf_event_declaration *event =
1587 g_ptr_array_index(stream_class->events_by_id, i);
1588 struct ctf_event_definition *stream_event;
1589
1590 if (!event)
1591 continue;
1592 stream_event = create_event_definitions(td, stream, event);
1593 if (!stream_event) {
1594 ret = -EINVAL;
1595 goto error;
1596 }
1597 g_ptr_array_index(stream->events_by_id, i) = stream_event;
1598 }
1599 error:
1600 return ret;
1601 }
1602
1603 static
1604 int create_stream_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1605 {
1606 struct ctf_stream_declaration *stream_class;
1607 int ret;
1608 int i;
1609
1610 if (stream->stream_definitions_created)
1611 return 0;
1612
1613 stream_class = stream->stream_class;
1614
1615 if (stream_class->packet_context_decl) {
1616 struct bt_definition *definition =
1617 stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p,
1618 stream->parent_def_scope, 0, 0, "stream.packet.context");
1619 if (!definition) {
1620 ret = -EINVAL;
1621 goto error;
1622 }
1623 stream->stream_packet_context = container_of(definition,
1624 struct definition_struct, p);
1625 stream->parent_def_scope = stream->stream_packet_context->p.scope;
1626 }
1627 if (stream_class->event_header_decl) {
1628 struct bt_definition *definition =
1629 stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p,
1630 stream->parent_def_scope, 0, 0, "stream.event.header");
1631 if (!definition) {
1632 ret = -EINVAL;
1633 goto error;
1634 }
1635 stream->stream_event_header =
1636 container_of(definition, struct definition_struct, p);
1637 stream->parent_def_scope = stream->stream_event_header->p.scope;
1638 }
1639 if (stream_class->event_context_decl) {
1640 struct bt_definition *definition =
1641 stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p,
1642 stream->parent_def_scope, 0, 0, "stream.event.context");
1643 if (!definition) {
1644 ret = -EINVAL;
1645 goto error;
1646 }
1647 stream->stream_event_context =
1648 container_of(definition, struct definition_struct, p);
1649 stream->parent_def_scope = stream->stream_event_context->p.scope;
1650 }
1651 stream->events_by_id = g_ptr_array_new();
1652 ret = copy_event_declarations_stream_class_to_stream(td,
1653 stream_class, stream);
1654 if (ret)
1655 goto error_event;
1656 return 0;
1657
1658 error_event:
1659 for (i = 0; i < stream->events_by_id->len; i++) {
1660 struct ctf_event_definition *stream_event = g_ptr_array_index(stream->events_by_id, i);
1661 if (stream_event)
1662 g_free(stream_event);
1663 }
1664 g_ptr_array_free(stream->events_by_id, TRUE);
1665 error:
1666 if (stream->stream_event_context)
1667 bt_definition_unref(&stream->stream_event_context->p);
1668 if (stream->stream_event_header)
1669 bt_definition_unref(&stream->stream_event_header->p);
1670 if (stream->stream_packet_context)
1671 bt_definition_unref(&stream->stream_packet_context->p);
1672 fprintf(stderr, "[error] Unable to create stream (%" PRIu64 ") definitions: %s\n",
1673 stream_class->stream_id, strerror(-ret));
1674 return ret;
1675 }
1676
1677 static
1678 int stream_assign_class(struct ctf_trace *td,
1679 struct ctf_file_stream *file_stream,
1680 uint64_t stream_id)
1681 {
1682 struct ctf_stream_declaration *stream;
1683 int ret;
1684
1685 file_stream->parent.stream_id = stream_id;
1686 if (stream_id >= td->streams->len) {
1687 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1688 return -EINVAL;
1689 }
1690 stream = g_ptr_array_index(td->streams, stream_id);
1691 if (!stream) {
1692 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1693 return -EINVAL;
1694 }
1695 file_stream->parent.stream_class = stream;
1696 ret = create_stream_definitions(td, &file_stream->parent);
1697 if (ret)
1698 return ret;
1699 return 0;
1700 }
1701
1702 static
1703 int create_stream_one_packet_index(struct ctf_stream_pos *pos,
1704 struct ctf_trace *td,
1705 struct ctf_file_stream *file_stream,
1706 size_t filesize)
1707 {
1708 struct packet_index packet_index;
1709 uint64_t stream_id = 0;
1710 uint64_t packet_map_len = DEFAULT_HEADER_LEN, tmp_map_len;
1711 int first_packet = 0;
1712 int len_index;
1713 int ret;
1714
1715 begin:
1716 memset(&packet_index, 0, sizeof(packet_index));
1717 if (!pos->mmap_offset) {
1718 first_packet = 1;
1719 }
1720
1721 if (filesize - pos->mmap_offset < (packet_map_len >> LOG2_CHAR_BIT)) {
1722 packet_map_len = (filesize - pos->mmap_offset) << LOG2_CHAR_BIT;
1723 }
1724
1725 if (pos->base_mma) {
1726 /* unmap old base */
1727 ret = munmap_align(pos->base_mma);
1728 if (ret) {
1729 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1730 strerror(errno));
1731 return ret;
1732 }
1733 pos->base_mma = NULL;
1734 }
1735 /* map new base. Need mapping length from header. */
1736 pos->base_mma = mmap_align(packet_map_len >> LOG2_CHAR_BIT, PROT_READ,
1737 MAP_PRIVATE, pos->fd, pos->mmap_offset);
1738 assert(pos->base_mma != MAP_FAILED);
1739 /*
1740 * Use current mapping size as temporary content and packet
1741 * size.
1742 */
1743 pos->content_size = packet_map_len;
1744 pos->packet_size = packet_map_len;
1745 pos->offset = 0; /* Position of the packet header */
1746
1747 packet_index.offset = pos->mmap_offset;
1748
1749 /* read and check header, set stream id (and check) */
1750 if (file_stream->parent.trace_packet_header) {
1751 /* Read packet header */
1752 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1753 if (ret) {
1754 if (ret == -EFAULT)
1755 goto retry;
1756 fprintf(stderr, "[error] Unable to read packet header: %s\n", strerror(-ret));
1757 return ret;
1758 }
1759 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic"));
1760 if (len_index >= 0) {
1761 struct bt_definition *field;
1762 uint64_t magic;
1763
1764 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1765 magic = bt_get_unsigned_int(field);
1766 if (magic != CTF_MAGIC) {
1767 fprintf(stderr, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
1768 magic,
1769 file_stream->pos.packet_index->len,
1770 (ssize_t) pos->mmap_offset);
1771 return -EINVAL;
1772 }
1773 }
1774
1775 /* check uuid */
1776 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid"));
1777 if (len_index >= 0) {
1778 struct definition_array *defarray;
1779 struct bt_definition *field;
1780 uint64_t i;
1781 uint8_t uuidval[BABELTRACE_UUID_LEN];
1782
1783 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1784 assert(field->declaration->id == CTF_TYPE_ARRAY);
1785 defarray = container_of(field, struct definition_array, p);
1786 assert(bt_array_len(defarray) == BABELTRACE_UUID_LEN);
1787
1788 for (i = 0; i < BABELTRACE_UUID_LEN; i++) {
1789 struct bt_definition *elem;
1790
1791 elem = bt_array_index(defarray, i);
1792 uuidval[i] = bt_get_unsigned_int(elem);
1793 }
1794 ret = bt_uuid_compare(td->uuid, uuidval);
1795 if (ret) {
1796 fprintf(stderr, "[error] Unique Universal Identifiers do not match.\n");
1797 return -EINVAL;
1798 }
1799 }
1800
1801 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id"));
1802 if (len_index >= 0) {
1803 struct bt_definition *field;
1804
1805 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1806 stream_id = bt_get_unsigned_int(field);
1807 }
1808 }
1809
1810 if (!first_packet && file_stream->parent.stream_id != stream_id) {
1811 fprintf(stderr, "[error] Stream ID is changing within a stream: expecting %" PRIu64 ", but packet has %" PRIu64 "\n",
1812 stream_id,
1813 file_stream->parent.stream_id);
1814 return -EINVAL;
1815 }
1816 if (first_packet) {
1817 ret = stream_assign_class(td, file_stream, stream_id);
1818 if (ret)
1819 return ret;
1820 }
1821
1822 if (file_stream->parent.stream_packet_context) {
1823 /* Read packet context */
1824 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1825 if (ret) {
1826 if (ret == -EFAULT)
1827 goto retry;
1828 fprintf(stderr, "[error] Unable to read packet context: %s\n", strerror(-ret));
1829 return ret;
1830 }
1831 /* read packet size from header */
1832 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size"));
1833 if (len_index >= 0) {
1834 struct bt_definition *field;
1835
1836 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1837 packet_index.packet_size = bt_get_unsigned_int(field);
1838 } else {
1839 /* Use file size for packet size */
1840 packet_index.packet_size = filesize * CHAR_BIT;
1841 }
1842
1843 /* read content size from header */
1844 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size"));
1845 if (len_index >= 0) {
1846 struct bt_definition *field;
1847
1848 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1849 packet_index.content_size = bt_get_unsigned_int(field);
1850 } else {
1851 /* Use packet size if non-zero, else file size */
1852 packet_index.content_size = packet_index.packet_size ? : filesize * CHAR_BIT;
1853 }
1854
1855 /* read timestamp begin from header */
1856 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin"));
1857 if (len_index >= 0) {
1858 struct bt_definition *field;
1859
1860 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1861 packet_index.ts_cycles.timestamp_begin = bt_get_unsigned_int(field);
1862 if (file_stream->parent.stream_class->trace->parent.collection) {
1863 packet_index.ts_real.timestamp_begin =
1864 ctf_get_real_timestamp(
1865 &file_stream->parent,
1866 packet_index.ts_cycles.timestamp_begin);
1867 }
1868 }
1869
1870 /* read timestamp end from header */
1871 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end"));
1872 if (len_index >= 0) {
1873 struct bt_definition *field;
1874
1875 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1876 packet_index.ts_cycles.timestamp_end = bt_get_unsigned_int(field);
1877 if (file_stream->parent.stream_class->trace->parent.collection) {
1878 packet_index.ts_real.timestamp_end =
1879 ctf_get_real_timestamp(
1880 &file_stream->parent,
1881 packet_index.ts_cycles.timestamp_end);
1882 }
1883 }
1884
1885 /* read events discarded from header */
1886 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("events_discarded"));
1887 if (len_index >= 0) {
1888 struct bt_definition *field;
1889
1890 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1891 packet_index.events_discarded = bt_get_unsigned_int(field);
1892 packet_index.events_discarded_len = bt_get_int_len(field);
1893 }
1894
1895 /* read packet_seq_num from header */
1896 len_index = bt_struct_declaration_lookup_field_index(
1897 file_stream->parent.stream_packet_context->declaration,
1898 g_quark_from_static_string("packet_seq_num"));
1899 if (len_index >= 0) {
1900 struct bt_definition *field;
1901
1902 field = bt_struct_definition_get_field_from_index(
1903 file_stream->parent.stream_packet_context,
1904 len_index);
1905 packet_index.packet_seq_num = bt_get_unsigned_int(field);
1906 }
1907 } else {
1908 /* Use file size for packet size */
1909 packet_index.packet_size = filesize * CHAR_BIT;
1910 /* Use packet size if non-zero, else file size */
1911 packet_index.content_size = packet_index.packet_size ? : filesize * CHAR_BIT;
1912 }
1913
1914 /* Validate content size and packet size values */
1915 if (packet_index.content_size > packet_index.packet_size) {
1916 fprintf(stderr, "[error] Content size (%" PRIu64 " bits) is larger than packet size (%" PRIu64 " bits).\n",
1917 packet_index.content_size, packet_index.packet_size);
1918 return -EINVAL;
1919 }
1920
1921 if (packet_index.packet_size > ((uint64_t) filesize - packet_index.offset) * CHAR_BIT) {
1922 fprintf(stderr, "[error] Packet size (%" PRIu64 " bits) is larger than remaining file size (%" PRIu64 " bits).\n",
1923 packet_index.packet_size, ((uint64_t) filesize - packet_index.offset) * CHAR_BIT);
1924 return -EINVAL;
1925 }
1926
1927 if (packet_index.content_size < pos->offset) {
1928 fprintf(stderr, "[error] Invalid CTF stream: content size is smaller than packet headers.\n");
1929 return -EINVAL;
1930 }
1931
1932 if ((packet_index.packet_size >> LOG2_CHAR_BIT) == 0) {
1933 fprintf(stderr, "[error] Invalid CTF stream: packet size needs to be at least one byte\n");
1934 return -EINVAL;
1935 }
1936
1937 /* Save position after header and context */
1938 packet_index.data_offset = pos->offset;
1939
1940 /* add index to packet array */
1941 g_array_append_val(file_stream->pos.packet_index, packet_index);
1942
1943 pos->mmap_offset += packet_index.packet_size >> LOG2_CHAR_BIT;
1944
1945 return 0;
1946
1947 /* Retry with larger mapping */
1948 retry:
1949 if (packet_map_len == ((filesize - pos->mmap_offset) << LOG2_CHAR_BIT)) {
1950 /*
1951 * Reached EOF, but still expecting header/context data.
1952 */
1953 fprintf(stderr, "[error] Reached end of file, but still expecting header or context fields.\n");
1954 return -EFAULT;
1955 }
1956 /* Double the mapping len, and retry */
1957 tmp_map_len = packet_map_len << 1;
1958 if (tmp_map_len >> 1 != packet_map_len) {
1959 /* Overflow */
1960 fprintf(stderr, "[error] Packet mapping length overflow\n");
1961 return -EFAULT;
1962 }
1963 packet_map_len = tmp_map_len;
1964 goto begin;
1965 }
1966
1967 static
1968 int create_stream_packet_index(struct ctf_trace *td,
1969 struct ctf_file_stream *file_stream)
1970 {
1971 struct ctf_stream_pos *pos;
1972 struct stat filestats;
1973 int ret;
1974
1975 pos = &file_stream->pos;
1976
1977 ret = fstat(pos->fd, &filestats);
1978 if (ret < 0)
1979 return ret;
1980
1981 /* Deal with empty files */
1982 if (!filestats.st_size) {
1983 if (file_stream->parent.trace_packet_header
1984 || file_stream->parent.stream_packet_context) {
1985 /*
1986 * We expect a trace packet header and/or stream packet
1987 * context. Since a trace needs to have at least one
1988 * packet, empty files are therefore not accepted.
1989 */
1990 fprintf(stderr, "[error] Encountered an empty file, but expecting a trace packet header.\n");
1991 return -EINVAL;
1992 } else {
1993 /*
1994 * Without trace packet header nor stream packet
1995 * context, a one-packet trace can indeed be empty. This
1996 * is only valid if there is only one stream class: 0.
1997 */
1998 ret = stream_assign_class(td, file_stream, 0);
1999 if (ret)
2000 return ret;
2001 return 0;
2002 }
2003 }
2004
2005 for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
2006 ret = create_stream_one_packet_index(pos, td, file_stream,
2007 filestats.st_size);
2008 if (ret)
2009 return ret;
2010 }
2011 return 0;
2012 }
2013
2014 static
2015 int create_trace_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
2016 {
2017 int ret;
2018
2019 if (td->packet_header_decl) {
2020 struct bt_definition *definition =
2021 td->packet_header_decl->p.definition_new(&td->packet_header_decl->p,
2022 stream->parent_def_scope, 0, 0, "trace.packet.header");
2023 if (!definition) {
2024 ret = -EINVAL;
2025 goto error;
2026 }
2027 stream->trace_packet_header =
2028 container_of(definition, struct definition_struct, p);
2029 stream->parent_def_scope = stream->trace_packet_header->p.scope;
2030 }
2031
2032 return 0;
2033
2034 error:
2035 fprintf(stderr, "[error] Unable to create trace definitions: %s\n", strerror(-ret));
2036 return ret;
2037 }
2038
2039 static
2040 int import_stream_packet_index(struct ctf_trace *td,
2041 struct ctf_file_stream *file_stream)
2042 {
2043 struct ctf_stream_pos *pos;
2044 struct ctf_packet_index *ctf_index = NULL;
2045 struct ctf_packet_index_file_hdr index_hdr;
2046 struct packet_index index;
2047 uint32_t packet_index_len, index_minor;
2048 int ret = 0;
2049 int first_packet = 1;
2050 size_t len;
2051
2052 pos = &file_stream->pos;
2053
2054 len = fread(&index_hdr, sizeof(index_hdr), 1, pos->index_fp);
2055 if (len != 1) {
2056 perror("read index file header");
2057 goto error;
2058 }
2059
2060 /* Check the index header */
2061 if (be32toh(index_hdr.magic) != CTF_INDEX_MAGIC) {
2062 fprintf(stderr, "[error] wrong index magic\n");
2063 ret = -1;
2064 goto error;
2065 }
2066 if (be32toh(index_hdr.index_major) != CTF_INDEX_MAJOR) {
2067 fprintf(stderr, "[error] Incompatible index file %" PRIu32
2068 ".%" PRIu32 ", supported %d.%d\n",
2069 be32toh(index_hdr.index_major),
2070 be32toh(index_hdr.index_minor), CTF_INDEX_MAJOR,
2071 CTF_INDEX_MINOR);
2072 ret = -1;
2073 goto error;
2074 }
2075 index_minor = be32toh(index_hdr.index_minor);
2076
2077 packet_index_len = be32toh(index_hdr.packet_index_len);
2078 if (packet_index_len == 0) {
2079 fprintf(stderr, "[error] Packet index length cannot be 0.\n");
2080 ret = -1;
2081 goto error;
2082 }
2083 /*
2084 * Allocate the index length found in header, not internal
2085 * representation.
2086 */
2087 ctf_index = g_malloc0(packet_index_len);
2088 while (fread(ctf_index, packet_index_len, 1,
2089 pos->index_fp) == 1) {
2090 uint64_t stream_id;
2091 struct ctf_stream_declaration *stream = NULL;
2092
2093 memset(&index, 0, sizeof(index));
2094 index.offset = be64toh(ctf_index->offset);
2095 index.packet_size = be64toh(ctf_index->packet_size);
2096 index.content_size = be64toh(ctf_index->content_size);
2097 index.ts_cycles.timestamp_begin = be64toh(ctf_index->timestamp_begin);
2098 index.ts_cycles.timestamp_end = be64toh(ctf_index->timestamp_end);
2099 index.events_discarded = be64toh(ctf_index->events_discarded);
2100 index.events_discarded_len = 64;
2101 index.data_offset = -1;
2102 stream_id = be64toh(ctf_index->stream_id);
2103 if (index_minor >= 1) {
2104 index.stream_instance_id = be64toh(ctf_index->stream_instance_id);
2105 index.packet_seq_num = be64toh(ctf_index->packet_seq_num);
2106 }
2107
2108 if (!first_packet) {
2109 /* add index to packet array */
2110 g_array_append_val(file_stream->pos.packet_index, index);
2111 continue;
2112 }
2113
2114 file_stream->parent.stream_id = stream_id;
2115 if (stream_id < td->streams->len) {
2116 stream = g_ptr_array_index(td->streams, stream_id);
2117 }
2118 if (!stream) {
2119 fprintf(stderr, "[error] Stream %" PRIu64
2120 " is not declared in metadata.\n",
2121 stream_id);
2122 ret = -EINVAL;
2123 goto error;
2124 }
2125 file_stream->parent.stream_class = stream;
2126 ret = create_stream_definitions(td, &file_stream->parent);
2127 if (ret)
2128 goto error;
2129 first_packet = 0;
2130 /* add index to packet array */
2131 g_array_append_val(file_stream->pos.packet_index, index);
2132 }
2133
2134 /* Index containing only the header. */
2135 if (!file_stream->parent.stream_class) {
2136 ret = -1;
2137 goto error;
2138 }
2139
2140 ret = 0;
2141
2142 error:
2143 g_free(ctf_index);
2144 return ret;
2145 }
2146
2147 /*
2148 * Note: many file streams can inherit from the same stream class
2149 * description (metadata).
2150 */
2151 static
2152 int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
2153 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2154 int whence))
2155 {
2156 int ret, fd, closeret;
2157 struct ctf_file_stream *file_stream;
2158 struct stat statbuf;
2159 char *index_name;
2160
2161 fd = openat(td->dirfd, path, flags);
2162 if (fd < 0) {
2163 perror("File stream openat()");
2164 ret = fd;
2165 goto error;
2166 }
2167
2168 /* Don't try to mmap subdirectories. Skip them, return success. */
2169 ret = fstat(fd, &statbuf);
2170 if (ret) {
2171 perror("File stream fstat()");
2172 goto fstat_error;
2173 }
2174 if (S_ISDIR(statbuf.st_mode)) {
2175 if (strncmp(path, "index", 5) != 0) {
2176 fprintf(stderr, "[warning] Skipping directory '%s' "
2177 "found in trace\n", path);
2178 }
2179 ret = 0;
2180 goto fd_is_dir_ok;
2181 }
2182 if (!statbuf.st_size) {
2183 /** Skip empty files. */
2184 ret = 0;
2185 goto fd_is_empty_file;
2186 }
2187
2188 file_stream = g_new0(struct ctf_file_stream, 1);
2189 file_stream->pos.last_offset = LAST_OFFSET_POISON;
2190 file_stream->pos.fd = -1;
2191 file_stream->pos.index_fp = NULL;
2192
2193 strncpy(file_stream->parent.path, path, PATH_MAX);
2194 file_stream->parent.path[PATH_MAX - 1] = '\0';
2195
2196 if (packet_seek) {
2197 file_stream->pos.packet_seek = packet_seek;
2198 } else {
2199 fprintf(stderr, "[error] packet_seek function undefined.\n");
2200 ret = -1;
2201 goto error_def;
2202 }
2203
2204 ret = ctf_init_pos(&file_stream->pos, &td->parent, fd, flags);
2205 if (ret)
2206 goto error_def;
2207 ret = create_trace_definitions(td, &file_stream->parent);
2208 if (ret)
2209 goto error_def;
2210 /*
2211 * For now, only a single clock per trace is supported.
2212 */
2213 file_stream->parent.current_clock = td->parent.single_clock;
2214
2215 /*
2216 * Allocate the index name for this stream and try to open it.
2217 */
2218 index_name = malloc((strlen(path) + sizeof(INDEX_PATH)) * sizeof(char));
2219 if (!index_name) {
2220 fprintf(stderr, "[error] Cannot allocate index filename\n");
2221 ret = -ENOMEM;
2222 goto error_def;
2223 }
2224 snprintf(index_name, strlen(path) + sizeof(INDEX_PATH),
2225 INDEX_PATH, path);
2226
2227 if (bt_faccessat(td->dirfd, td->parent.path, index_name, O_RDONLY, 0) < 0) {
2228 ret = create_stream_packet_index(td, file_stream);
2229 if (ret) {
2230 fprintf(stderr, "[error] Stream index creation error.\n");
2231 goto error_index;
2232 }
2233 } else {
2234 ret = openat(td->dirfd, index_name, flags);
2235 if (ret < 0) {
2236 perror("Index file openat()");
2237 ret = -1;
2238 goto error_free;
2239 }
2240 file_stream->pos.index_fp = fdopen(ret, "r");
2241 if (!file_stream->pos.index_fp) {
2242 perror("fdopen() error");
2243 goto error_free;
2244 }
2245 ret = import_stream_packet_index(td, file_stream);
2246 if (ret) {
2247 ret = -1;
2248 goto error_index;
2249 }
2250 ret = fclose(file_stream->pos.index_fp);
2251 if (ret < 0) {
2252 perror("close index");
2253 goto error_free;
2254 }
2255 }
2256 free(index_name);
2257
2258 /* Add stream file to stream class */
2259 g_ptr_array_add(file_stream->parent.stream_class->streams,
2260 &file_stream->parent);
2261 return 0;
2262
2263 error_index:
2264 if (file_stream->pos.index_fp) {
2265 ret = fclose(file_stream->pos.index_fp);
2266 if (ret < 0) {
2267 perror("close index");
2268 }
2269 }
2270 if (file_stream->parent.trace_packet_header)
2271 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
2272 error_free:
2273 free(index_name);
2274 error_def:
2275 closeret = ctf_fini_pos(&file_stream->pos);
2276 if (closeret) {
2277 fprintf(stderr, "Error on ctf_fini_pos\n");
2278 }
2279 g_free(file_stream);
2280 fd_is_empty_file:
2281 fd_is_dir_ok:
2282 fstat_error:
2283 closeret = close(fd);
2284 if (closeret) {
2285 perror("Error on fd close");
2286 }
2287 error:
2288 return ret;
2289 }
2290
2291 static
2292 int ctf_open_trace_read(struct ctf_trace *td,
2293 const char *path, int flags,
2294 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2295 int whence), FILE *metadata_fp)
2296 {
2297 struct ctf_scanner *scanner;
2298 int ret, closeret;
2299 struct dirent *dirent;
2300 struct dirent *diriter;
2301 size_t dirent_len;
2302 char *ext;
2303
2304 td->flags = flags;
2305
2306 /* Open trace directory */
2307 td->dir = opendir(path);
2308 if (!td->dir) {
2309 fprintf(stderr, "[error] Unable to open trace directory \"%s\".\n", path);
2310 ret = -ENOENT;
2311 goto error;
2312 }
2313
2314 td->dirfd = open(path, 0);
2315 if (td->dirfd < 0) {
2316 fprintf(stderr, "[error] Unable to open trace directory file descriptor for path \"%s\".\n", path);
2317 perror("Trace directory open");
2318 ret = -errno;
2319 goto error_dirfd;
2320 }
2321 strncpy(td->parent.path, path, sizeof(td->parent.path));
2322 td->parent.path[sizeof(td->parent.path) - 1] = '\0';
2323
2324 /*
2325 * Keep the metadata file separate.
2326 * Keep scanner object local to the open. We don't support
2327 * incremental metadata append for on-disk traces.
2328 */
2329 scanner = ctf_scanner_alloc();
2330 if (!scanner) {
2331 fprintf(stderr, "[error] Error allocating scanner\n");
2332 ret = -ENOMEM;
2333 goto error_metadata;
2334 }
2335 ret = ctf_trace_metadata_read(td, metadata_fp, scanner, 0);
2336 ctf_scanner_free(scanner);
2337 if (ret) {
2338 if (ret == -ENOENT) {
2339 fprintf(stderr, "[warning] Empty metadata.\n");
2340 }
2341 fprintf(stderr, "[warning] Unable to open trace metadata for path \"%s\".\n", path);
2342 goto error_metadata;
2343 }
2344
2345 /*
2346 * Open each stream: for each file, try to open, check magic
2347 * number, and get the stream ID to add to the right location in
2348 * the stream array.
2349 */
2350
2351 dirent_len = offsetof(struct dirent, d_name) +
2352 fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
2353
2354 dirent = malloc(dirent_len);
2355
2356 for (;;) {
2357 ret = readdir_r(td->dir, dirent, &diriter);
2358 if (ret) {
2359 fprintf(stderr, "[error] Readdir error.\n");
2360 goto readdir_error;
2361 }
2362 if (!diriter)
2363 break;
2364 /* Ignore hidden files, ., .. and metadata. */
2365 if (!strncmp(diriter->d_name, ".", 1)
2366 || !strcmp(diriter->d_name, "..")
2367 || !strcmp(diriter->d_name, "metadata"))
2368 continue;
2369
2370 /* Ignore index files : *.idx */
2371 ext = strrchr(diriter->d_name, '.');
2372 if (ext && (!strcmp(ext, ".idx"))) {
2373 continue;
2374 }
2375
2376 ret = ctf_open_file_stream_read(td, diriter->d_name,
2377 flags, packet_seek);
2378 if (ret) {
2379 fprintf(stderr, "[error] Open file stream error.\n");
2380 goto readdir_error;
2381 }
2382 }
2383
2384 free(dirent);
2385 return 0;
2386
2387 readdir_error:
2388 free(dirent);
2389 error_metadata:
2390 closeret = close(td->dirfd);
2391 if (closeret) {
2392 perror("Error on fd close");
2393 }
2394 error_dirfd:
2395 closeret = closedir(td->dir);
2396 if (closeret) {
2397 perror("Error on closedir");
2398 }
2399 error:
2400 return ret;
2401 }
2402
2403 /*
2404 * ctf_open_trace: Open a CTF trace and index it.
2405 * Note that the user must seek the trace after the open (using the iterator)
2406 * since the index creation read it entirely.
2407 */
2408 static
2409 struct bt_trace_descriptor *ctf_open_trace(const char *path, int flags,
2410 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2411 int whence), FILE *metadata_fp)
2412 {
2413 struct ctf_trace *td;
2414 int ret;
2415
2416 /*
2417 * If packet_seek is NULL, we provide our default version.
2418 */
2419 if (!packet_seek)
2420 packet_seek = ctf_packet_seek;
2421
2422 td = g_new0(struct ctf_trace, 1);
2423 if (!td) {
2424 goto error;
2425 }
2426 init_trace_descriptor(&td->parent);
2427
2428 switch (flags & O_ACCMODE) {
2429 case O_RDONLY:
2430 if (!path) {
2431 fprintf(stderr, "[error] Path missing for input CTF trace.\n");
2432 goto error;
2433 }
2434 ret = ctf_open_trace_read(td, path, flags, packet_seek, metadata_fp);
2435 if (ret)
2436 goto error;
2437 break;
2438 case O_RDWR:
2439 fprintf(stderr, "[error] Opening CTF traces for output is not supported yet.\n");
2440 goto error;
2441 default:
2442 fprintf(stderr, "[error] Incorrect open flags.\n");
2443 goto error;
2444 }
2445
2446 ret = trace_debug_info_create(td);
2447 if (ret) {
2448 goto error;
2449 }
2450
2451 return &td->parent;
2452 error:
2453 if (td) {
2454 trace_debug_info_destroy(td);
2455 g_free(td);
2456 }
2457 return NULL;
2458 }
2459
2460 static
2461 void ctf_init_mmap_pos(struct ctf_stream_pos *pos,
2462 struct bt_mmap_stream *mmap_info)
2463 {
2464 pos->mmap_offset = 0;
2465 pos->packet_size = 0;
2466 pos->content_size = 0;
2467 pos->content_size_loc = NULL;
2468 pos->fd = mmap_info->fd;
2469 pos->base_mma = NULL;
2470 pos->offset = 0;
2471 pos->dummy = false;
2472 pos->cur_index = 0;
2473 pos->prot = PROT_READ;
2474 pos->flags = MAP_PRIVATE;
2475 pos->parent.rw_table = read_dispatch_table;
2476 pos->parent.event_cb = ctf_read_event;
2477 pos->priv = mmap_info->priv;
2478 pos->packet_index = g_array_new(FALSE, TRUE,
2479 sizeof(struct packet_index));
2480 }
2481
2482 static
2483 int prepare_mmap_stream_definition(struct ctf_trace *td,
2484 struct ctf_file_stream *file_stream,
2485 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2486 int whence))
2487 {
2488 struct ctf_stream_declaration *stream;
2489 uint64_t stream_id;
2490 int ret;
2491
2492 /* Ask for the first packet to get the stream_id. */
2493 packet_seek(&file_stream->pos.parent, 0, SEEK_SET);
2494 ret = bt_packet_seek_get_error();
2495 if (ret) {
2496 goto end;
2497 }
2498 stream_id = file_stream->parent.stream_id;
2499 if (stream_id >= td->streams->len) {
2500 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
2501 "in metadata.\n", stream_id);
2502 ret = -EINVAL;
2503 goto end;
2504 }
2505 stream = g_ptr_array_index(td->streams, stream_id);
2506 if (!stream) {
2507 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
2508 "in metadata.\n", stream_id);
2509 ret = -EINVAL;
2510 goto end;
2511 }
2512 file_stream->parent.stream_class = stream;
2513 ret = create_stream_definitions(td, &file_stream->parent);
2514 end:
2515 return ret;
2516 }
2517
2518 static
2519 int ctf_open_mmap_stream_read(struct ctf_trace *td,
2520 struct bt_mmap_stream *mmap_info,
2521 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2522 int whence))
2523 {
2524 int ret;
2525 struct ctf_file_stream *file_stream;
2526
2527 file_stream = g_new0(struct ctf_file_stream, 1);
2528 file_stream->parent.stream_id = -1ULL;
2529 file_stream->pos.last_offset = LAST_OFFSET_POISON;
2530 ctf_init_mmap_pos(&file_stream->pos, mmap_info);
2531
2532 file_stream->pos.packet_seek = packet_seek;
2533
2534 ret = create_trace_definitions(td, &file_stream->parent);
2535 if (ret) {
2536 goto error_def;
2537 }
2538
2539 ret = prepare_mmap_stream_definition(td, file_stream, packet_seek);
2540 if (ret)
2541 goto error_index;
2542
2543 /*
2544 * For now, only a single clock per trace is supported.
2545 */
2546 file_stream->parent.current_clock = td->parent.single_clock;
2547
2548 /* Add stream file to stream class */
2549 g_ptr_array_add(file_stream->parent.stream_class->streams,
2550 &file_stream->parent);
2551 return 0;
2552
2553 error_index:
2554 if (file_stream->parent.trace_packet_header)
2555 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
2556 error_def:
2557 g_free(file_stream);
2558 return ret;
2559 }
2560
2561 static
2562 int ctf_open_mmap_trace_read(struct ctf_trace *td,
2563 struct bt_mmap_stream_list *mmap_list,
2564 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2565 int whence),
2566 FILE *metadata_fp)
2567 {
2568 int ret;
2569 struct bt_mmap_stream *mmap_info;
2570
2571 td->scanner = ctf_scanner_alloc();
2572 if (!td->scanner) {
2573 fprintf(stderr, "[error] Error allocating scanner\n");
2574 ret = -ENOMEM;
2575 goto error;
2576 }
2577 ret = ctf_trace_metadata_read(td, metadata_fp, td->scanner, 0);
2578 if (ret) {
2579 if (ret == -ENOENT) {
2580 fprintf(stderr, "[warning] Empty metadata.\n");
2581 }
2582 goto error;
2583 }
2584
2585 /*
2586 * for each stream, try to open, check magic number, and get the
2587 * stream ID to add to the right location in the stream array.
2588 */
2589 bt_list_for_each_entry(mmap_info, &mmap_list->head, list) {
2590 ret = ctf_open_mmap_stream_read(td, mmap_info, packet_seek);
2591 if (ret) {
2592 fprintf(stderr, "[error] Open file mmap stream error.\n");
2593 goto error;
2594 }
2595 }
2596 return 0;
2597
2598 error:
2599 ctf_scanner_free(td->scanner);
2600 return ret;
2601 }
2602
2603 static
2604 struct bt_trace_descriptor *ctf_open_mmap_trace(
2605 struct bt_mmap_stream_list *mmap_list,
2606 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2607 int whence),
2608 FILE *metadata_fp)
2609 {
2610 struct ctf_trace *td;
2611 int ret;
2612
2613 if (!metadata_fp) {
2614 fprintf(stderr, "[error] No metadata file pointer associated, "
2615 "required for mmap parsing\n");
2616 goto error;
2617 }
2618 if (!packet_seek) {
2619 fprintf(stderr, "[error] packet_seek function undefined.\n");
2620 goto error;
2621 }
2622 td = g_new0(struct ctf_trace, 1);
2623 td->dirfd = -1;
2624 ret = ctf_open_mmap_trace_read(td, mmap_list, packet_seek, metadata_fp);
2625 if (ret)
2626 goto error_free;
2627
2628 ret = trace_debug_info_create(td);
2629 if (ret) {
2630 goto error_free;
2631 }
2632
2633 return &td->parent;
2634
2635 error_free:
2636 g_free(td);
2637 error:
2638 return NULL;
2639 }
2640
2641 int ctf_append_trace_metadata(struct bt_trace_descriptor *tdp,
2642 FILE *metadata_fp)
2643 {
2644 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2645 int i, j;
2646 int ret;
2647
2648 if (!td->scanner)
2649 return -EINVAL;
2650 ret = ctf_trace_metadata_read(td, metadata_fp, td->scanner, 1);
2651 if (ret)
2652 return ret;
2653 /* for each stream_class */
2654 for (i = 0; i < td->streams->len; i++) {
2655 struct ctf_stream_declaration *stream_class;
2656
2657 stream_class = g_ptr_array_index(td->streams, i);
2658 if (!stream_class)
2659 continue;
2660 /* for each stream */
2661 for (j = 0; j < stream_class->streams->len; j++) {
2662 struct ctf_stream_definition *stream;
2663
2664 stream = g_ptr_array_index(stream_class->streams, j);
2665 if (!stream)
2666 continue;
2667 ret = copy_event_declarations_stream_class_to_stream(td,
2668 stream_class, stream);
2669 if (ret)
2670 return ret;
2671 }
2672 }
2673 return 0;
2674 }
2675
2676 static
2677 int ctf_convert_index_timestamp(struct bt_trace_descriptor *tdp)
2678 {
2679 int i, j, k;
2680 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2681
2682 /* for each stream_class */
2683 for (i = 0; i < td->streams->len; i++) {
2684 struct ctf_stream_declaration *stream_class;
2685
2686 stream_class = g_ptr_array_index(td->streams, i);
2687 if (!stream_class)
2688 continue;
2689 /* for each file_stream */
2690 for (j = 0; j < stream_class->streams->len; j++) {
2691 struct ctf_stream_definition *stream;
2692 struct ctf_stream_pos *stream_pos;
2693 struct ctf_file_stream *cfs;
2694
2695 stream = g_ptr_array_index(stream_class->streams, j);
2696 if (!stream)
2697 continue;
2698 cfs = container_of(stream, struct ctf_file_stream,
2699 parent);
2700 stream_pos = &cfs->pos;
2701 if (!stream_pos->packet_index)
2702 continue;
2703
2704 for (k = 0; k < stream_pos->packet_index->len; k++) {
2705 struct packet_index *index;
2706
2707 index = &g_array_index(stream_pos->packet_index,
2708 struct packet_index, k);
2709 index->ts_real.timestamp_begin =
2710 ctf_get_real_timestamp(stream,
2711 index->ts_cycles.timestamp_begin);
2712 index->ts_real.timestamp_end =
2713 ctf_get_real_timestamp(stream,
2714 index->ts_cycles.timestamp_end);
2715 }
2716 }
2717 }
2718 return 0;
2719 }
2720
2721 static
2722 int ctf_close_file_stream(struct ctf_file_stream *file_stream)
2723 {
2724 int ret;
2725
2726 ret = ctf_fini_pos(&file_stream->pos);
2727 if (ret) {
2728 fprintf(stderr, "Error on ctf_fini_pos\n");
2729 return -1;
2730 }
2731 if (file_stream->pos.fd >= 0) {
2732 ret = close(file_stream->pos.fd);
2733 if (ret) {
2734 perror("Error closing file fd");
2735 return -1;
2736 }
2737 }
2738 return 0;
2739 }
2740
2741 static
2742 int ctf_close_trace(struct bt_trace_descriptor *tdp)
2743 {
2744 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2745 int ret;
2746
2747 if (td->streams) {
2748 int i;
2749
2750 for (i = 0; i < td->streams->len; i++) {
2751 struct ctf_stream_declaration *stream;
2752 int j;
2753
2754 stream = g_ptr_array_index(td->streams, i);
2755 if (!stream)
2756 continue;
2757 for (j = 0; j < stream->streams->len; j++) {
2758 struct ctf_file_stream *file_stream;
2759 file_stream = container_of(g_ptr_array_index(stream->streams, j),
2760 struct ctf_file_stream, parent);
2761 ret = ctf_close_file_stream(file_stream);
2762 if (ret)
2763 return ret;
2764 }
2765 }
2766 }
2767 ctf_destroy_metadata(td);
2768 ctf_scanner_free(td->scanner);
2769 if (td->dirfd >= 0) {
2770 ret = close(td->dirfd);
2771 if (ret) {
2772 perror("Error closing dirfd");
2773 return ret;
2774 }
2775 }
2776 if (td->dir) {
2777 ret = closedir(td->dir);
2778 if (ret) {
2779 perror("Error closedir");
2780 return ret;
2781 }
2782 }
2783 free(td->metadata_string);
2784 trace_debug_info_destroy(td);
2785 g_free(td);
2786 return 0;
2787 }
2788
2789 static
2790 void ctf_set_context(struct bt_trace_descriptor *descriptor,
2791 struct bt_context *ctx)
2792 {
2793 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2794 parent);
2795
2796 td->parent.ctx = ctx;
2797 }
2798
2799 static
2800 void ctf_set_handle(struct bt_trace_descriptor *descriptor,
2801 struct bt_trace_handle *handle)
2802 {
2803 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2804 parent);
2805
2806 td->parent.handle = handle;
2807 }
2808
2809 static
2810 void __attribute__((constructor)) ctf_init(void)
2811 {
2812 int ret;
2813
2814 ctf_format.name = g_quark_from_static_string("ctf");
2815 ret = bt_register_format(&ctf_format);
2816 assert(!ret);
2817 }
2818
2819 static
2820 void __attribute__((destructor)) ctf_exit(void)
2821 {
2822 bt_unregister_format(&ctf_format);
2823 }
BabelTrace - Trace Format Babel Tower
This page took 0.16629 seconds and 3 git commands to generate.