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[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 void bt_ctf_hook(void)
162 {
163 /*
164 * Dummy function to prevent the linker from discarding this format as
165 * "unused" in static builds.
166 */
167 }
168
169 static
170 uint64_t ctf_timestamp_begin(struct bt_trace_descriptor *descriptor,
171 struct bt_trace_handle *handle, enum bt_clock_type type)
172 {
173 struct ctf_trace *tin;
174 uint64_t begin = ULLONG_MAX;
175 int i, j;
176
177 tin = container_of(descriptor, struct ctf_trace, parent);
178
179 if (!tin)
180 goto error;
181
182 /* for each stream_class */
183 for (i = 0; i < tin->streams->len; i++) {
184 struct ctf_stream_declaration *stream_class;
185
186 stream_class = g_ptr_array_index(tin->streams, i);
187 if (!stream_class)
188 continue;
189 /* for each file_stream */
190 for (j = 0; j < stream_class->streams->len; j++) {
191 struct ctf_stream_definition *stream;
192 struct ctf_file_stream *cfs;
193 struct ctf_stream_pos *stream_pos;
194 struct packet_index *index;
195
196 stream = g_ptr_array_index(stream_class->streams, j);
197 cfs = container_of(stream, struct ctf_file_stream,
198 parent);
199 stream_pos = &cfs->pos;
200
201 if (!stream_pos->packet_index)
202 goto error;
203
204 if (stream_pos->packet_index->len <= 0)
205 continue;
206
207 index = &g_array_index(stream_pos->packet_index,
208 struct packet_index,
209 stream_pos->packet_index->len - 1);
210 if (type == BT_CLOCK_REAL) {
211 if (index->ts_real.timestamp_begin < begin)
212 begin = index->ts_real.timestamp_begin;
213 } else if (type == BT_CLOCK_CYCLES) {
214 if (index->ts_cycles.timestamp_begin < begin)
215 begin = index->ts_cycles.timestamp_begin;
216 } else {
217 goto error;
218 }
219 }
220 }
221
222 return begin;
223
224 error:
225 return -1ULL;
226 }
227
228 static
229 uint64_t ctf_timestamp_end(struct bt_trace_descriptor *descriptor,
230 struct bt_trace_handle *handle, enum bt_clock_type type)
231 {
232 struct ctf_trace *tin;
233 uint64_t end = 0;
234 int i, j;
235
236 tin = container_of(descriptor, struct ctf_trace, parent);
237
238 if (!tin)
239 goto error;
240
241 /* for each stream_class */
242 for (i = 0; i < tin->streams->len; i++) {
243 struct ctf_stream_declaration *stream_class;
244
245 stream_class = g_ptr_array_index(tin->streams, i);
246 if (!stream_class)
247 continue;
248 /* for each file_stream */
249 for (j = 0; j < stream_class->streams->len; j++) {
250 struct ctf_stream_definition *stream;
251 struct ctf_file_stream *cfs;
252 struct ctf_stream_pos *stream_pos;
253 struct packet_index *index;
254
255 stream = g_ptr_array_index(stream_class->streams, j);
256 cfs = container_of(stream, struct ctf_file_stream,
257 parent);
258 stream_pos = &cfs->pos;
259
260 if (!stream_pos->packet_index)
261 goto error;
262
263 if (stream_pos->packet_index->len <= 0)
264 continue;
265
266 index = &g_array_index(stream_pos->packet_index,
267 struct packet_index,
268 stream_pos->packet_index->len - 1);
269 if (type == BT_CLOCK_REAL) {
270 if (index->ts_real.timestamp_end > end)
271 end = index->ts_real.timestamp_end;
272 } else if (type == BT_CLOCK_CYCLES) {
273 if (index->ts_cycles.timestamp_end > end)
274 end = index->ts_cycles.timestamp_end;
275 } else {
276 goto error;
277 }
278 }
279 }
280
281 return end;
282
283 error:
284 return -1ULL;
285 }
286
287 /*
288 * Update stream current timestamp
289 */
290 static
291 void ctf_update_timestamp(struct ctf_stream_definition *stream,
292 struct definition_integer *integer_definition)
293 {
294 struct declaration_integer *integer_declaration =
295 integer_definition->declaration;
296 uint64_t oldval, newval, updateval;
297
298 if (unlikely(integer_declaration->len == 64)) {
299 stream->cycles_timestamp = integer_definition->value._unsigned;
300 stream->real_timestamp = ctf_get_real_timestamp(stream,
301 stream->cycles_timestamp);
302 return;
303 }
304 /* keep low bits */
305 oldval = stream->cycles_timestamp;
306 oldval &= (1ULL << integer_declaration->len) - 1;
307 newval = integer_definition->value._unsigned;
308 /* Test for overflow by comparing low bits */
309 if (newval < oldval)
310 newval += 1ULL << integer_declaration->len;
311 /* updateval contains old high bits, and new low bits (sum) */
312 updateval = stream->cycles_timestamp;
313 updateval &= ~((1ULL << integer_declaration->len) - 1);
314 updateval += newval;
315 stream->cycles_timestamp = updateval;
316
317 /* convert to real timestamp */
318 stream->real_timestamp = ctf_get_real_timestamp(stream,
319 stream->cycles_timestamp);
320 }
321
322 /*
323 * Print timestamp, rescaling clock frequency to nanoseconds and
324 * applying offsets as needed (unix time).
325 */
326 static
327 void ctf_print_timestamp_real(FILE *fp,
328 struct ctf_stream_definition *stream,
329 uint64_t timestamp)
330 {
331 uint64_t ts_sec = 0, ts_nsec;
332
333 ts_nsec = timestamp;
334
335 /* Add command-line offset in ns*/
336 ts_nsec += opt_clock_offset_ns;
337
338 /* Add command-line offset */
339 ts_sec += opt_clock_offset;
340
341 ts_sec += ts_nsec / NSEC_PER_SEC;
342 ts_nsec = ts_nsec % NSEC_PER_SEC;
343
344 if (!opt_clock_seconds) {
345 struct tm tm;
346 time_t time_s = (time_t) ts_sec;
347
348 if (!opt_clock_gmt) {
349 struct tm *res;
350
351 res = localtime_r(&time_s, &tm);
352 if (!res) {
353 fprintf(stderr, "[warning] Unable to get localtime.\n");
354 goto seconds;
355 }
356 } else {
357 struct tm *res;
358
359 res = gmtime_r(&time_s, &tm);
360 if (!res) {
361 fprintf(stderr, "[warning] Unable to get gmtime.\n");
362 goto seconds;
363 }
364 }
365 if (opt_clock_date) {
366 char timestr[26];
367 size_t res;
368
369 /* Print date and time */
370 res = strftime(timestr, sizeof(timestr),
371 "%F ", &tm);
372 if (!res) {
373 fprintf(stderr, "[warning] Unable to print ascii time.\n");
374 goto seconds;
375 }
376 fprintf(fp, "%s", timestr);
377 }
378 /* Print time in HH:MM:SS.ns */
379 fprintf(fp, "%02d:%02d:%02d.%09" PRIu64,
380 tm.tm_hour, tm.tm_min, tm.tm_sec, ts_nsec);
381 goto end;
382 }
383 seconds:
384 fprintf(fp, "%3" PRIu64 ".%09" PRIu64,
385 ts_sec, ts_nsec);
386
387 end:
388 return;
389 }
390
391 /*
392 * Print timestamp, in cycles
393 */
394 static
395 void ctf_print_timestamp_cycles(FILE *fp,
396 struct ctf_stream_definition *stream,
397 uint64_t timestamp)
398 {
399 fprintf(fp, "%020" PRIu64, timestamp);
400 }
401
402 void ctf_print_timestamp(FILE *fp,
403 struct ctf_stream_definition *stream,
404 uint64_t timestamp)
405 {
406 if (opt_clock_cycles) {
407 ctf_print_timestamp_cycles(fp, stream, timestamp);
408 } else {
409 ctf_print_timestamp_real(fp, stream, timestamp);
410 }
411 }
412
413 static
414 void print_uuid(FILE *fp, unsigned char *uuid)
415 {
416 int i;
417
418 for (i = 0; i < BABELTRACE_UUID_LEN; i++)
419 fprintf(fp, "%x", (unsigned int) uuid[i]);
420 }
421
422 /*
423 * Discarded events can be either:
424 * - discarded after end of previous buffer due to buffer full:
425 * happened within range: [ prev_timestamp_end, timestamp_begin ]
426 * - discarded within current buffer due to either event too large or
427 * nested wrap-around:
428 * happened within range: [ timestamp_begin, timestamp_end ]
429 *
430 * Given we have discarded counters of those two types merged into the
431 * events_discarded counter, we need to use the union of those ranges:
432 * [ prev_timestamp_end, timestamp_end ]
433 *
434 * Lost packets occur if the tracer overwrote some subbuffer(s) before the
435 * consumer had time to extract them. We keep track of those gaps with the
436 * packet sequence number in each packet.
437 */
438 void ctf_print_discarded_lost(FILE *fp, struct ctf_stream_definition *stream)
439 {
440 if ((!stream->events_discarded && !stream->packets_lost) ||
441 !babeltrace_ctf_console_output) {
442 return;
443 }
444 fflush(stdout);
445 if (stream->events_discarded) {
446 fprintf(fp, "[warning] Tracer discarded %" PRIu64 " events between [",
447 stream->events_discarded);
448 } else if (stream->packets_lost) {
449 fprintf(fp, "[warning] Tracer lost %" PRIu64 " trace packets between [",
450 stream->packets_lost);
451 }
452 if (opt_clock_cycles) {
453 ctf_print_timestamp(fp, stream,
454 stream->prev.cycles.end);
455 fprintf(fp, "] and [");
456 ctf_print_timestamp(fp, stream,
457 stream->current.cycles.end);
458 } else {
459 ctf_print_timestamp(fp, stream,
460 stream->prev.real.end);
461 fprintf(fp, "] and [");
462 ctf_print_timestamp(fp, stream,
463 stream->current.real.end);
464 }
465 fprintf(fp, "] in trace UUID ");
466 print_uuid(fp, stream->stream_class->trace->uuid);
467 if (stream->stream_class->trace->parent.path[0])
468 fprintf(fp, ", at path: \"%s\"",
469 stream->stream_class->trace->parent.path);
470
471 fprintf(fp, ", within stream id %" PRIu64, stream->stream_id);
472 if (stream->path[0])
473 fprintf(fp, ", at relative path: \"%s\"", stream->path);
474 fprintf(fp, ". ");
475 fprintf(fp, "You should consider recording a new trace with larger "
476 "buffers or with fewer events enabled.\n");
477 fflush(fp);
478 }
479
480 static
481 int ctf_read_event(struct bt_stream_pos *ppos, struct ctf_stream_definition *stream)
482 {
483 struct ctf_stream_pos *pos =
484 container_of(ppos, struct ctf_stream_pos, parent);
485 struct ctf_stream_declaration *stream_class = stream->stream_class;
486 struct ctf_event_definition *event;
487 uint64_t id = 0;
488 int ret;
489
490 /* We need to check for EOF here for empty files. */
491 if (unlikely(pos->offset == EOF))
492 return EOF;
493
494 if (ctf_pos_get_event(pos))
495 return EOF;
496
497 /* save the current position as a restore point */
498 pos->last_offset = pos->offset;
499
500 /*
501 * This is the EOF check after we've advanced the position in
502 * ctf_pos_get_event.
503 */
504 if (unlikely(pos->offset == EOF))
505 return EOF;
506
507 /* Stream is inactive for now (live reading). */
508 if (unlikely(pos->content_size == 0))
509 return EAGAIN;
510
511 /*
512 * Packet seeked to by ctf_pos_get_event() only contains
513 * headers, no event. Consider stream as inactive (live
514 * reading).
515 */
516 if (unlikely(pos->data_offset == pos->content_size))
517 return EAGAIN;
518
519 assert(pos->offset < pos->content_size);
520
521 /* Read event header */
522 if (likely(stream->stream_event_header)) {
523 struct definition_integer *integer_definition;
524 struct bt_definition *variant;
525
526 ret = generic_rw(ppos, &stream->stream_event_header->p);
527 if (unlikely(ret))
528 goto error;
529 /* lookup event id */
530 integer_definition = bt_lookup_integer(&stream->stream_event_header->p, "id", FALSE);
531 if (integer_definition) {
532 id = integer_definition->value._unsigned;
533 } else {
534 struct definition_enum *enum_definition;
535
536 enum_definition = bt_lookup_enum(&stream->stream_event_header->p, "id", FALSE);
537 if (enum_definition) {
538 id = enum_definition->integer->value._unsigned;
539 }
540 }
541
542 variant = bt_lookup_variant(&stream->stream_event_header->p, "v");
543 if (variant) {
544 integer_definition = bt_lookup_integer(variant, "id", FALSE);
545 if (integer_definition) {
546 id = integer_definition->value._unsigned;
547 }
548 }
549 stream->event_id = id;
550
551 /* lookup timestamp */
552 stream->has_timestamp = 0;
553 integer_definition = bt_lookup_integer(&stream->stream_event_header->p, "timestamp", FALSE);
554 if (integer_definition) {
555 ctf_update_timestamp(stream, integer_definition);
556 stream->has_timestamp = 1;
557 } else {
558 if (variant) {
559 integer_definition = bt_lookup_integer(variant, "timestamp", FALSE);
560 if (integer_definition) {
561 ctf_update_timestamp(stream, integer_definition);
562 stream->has_timestamp = 1;
563 }
564 }
565 }
566 }
567
568 /* Read stream-declared event context */
569 if (stream->stream_event_context) {
570 ret = generic_rw(ppos, &stream->stream_event_context->p);
571 if (ret)
572 goto error;
573 }
574
575 if (unlikely(id >= stream_class->events_by_id->len)) {
576 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
577 return -EINVAL;
578 }
579 event = g_ptr_array_index(stream->events_by_id, id);
580 if (unlikely(!event)) {
581 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
582 return -EINVAL;
583 }
584
585 /* Read event-declared event context */
586 if (event->event_context) {
587 ret = generic_rw(ppos, &event->event_context->p);
588 if (ret)
589 goto error;
590 }
591
592 /* Read event payload */
593 if (likely(event->event_fields)) {
594 ret = generic_rw(ppos, &event->event_fields->p);
595 if (ret)
596 goto error;
597 }
598
599 if (pos->last_offset == pos->offset) {
600 fprintf(stderr, "[error] Invalid 0 byte event encountered.\n");
601 return -EINVAL;
602 }
603
604 return 0;
605
606 error:
607 fprintf(stderr, "[error] Unexpected end of packet. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
608 return ret;
609 }
610
611 static
612 int ctf_write_event(struct bt_stream_pos *pos, struct ctf_stream_definition *stream)
613 {
614 struct ctf_stream_declaration *stream_class = stream->stream_class;
615 struct ctf_event_definition *event;
616 uint64_t id;
617 int ret;
618
619 id = stream->event_id;
620
621 /* print event header */
622 if (likely(stream->stream_event_header)) {
623 ret = generic_rw(pos, &stream->stream_event_header->p);
624 if (ret)
625 goto error;
626 }
627
628 /* print stream-declared event context */
629 if (stream->stream_event_context) {
630 ret = generic_rw(pos, &stream->stream_event_context->p);
631 if (ret)
632 goto error;
633 }
634
635 if (unlikely(id >= stream_class->events_by_id->len)) {
636 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
637 return -EINVAL;
638 }
639 event = g_ptr_array_index(stream->events_by_id, id);
640 if (unlikely(!event)) {
641 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
642 return -EINVAL;
643 }
644
645 /* print event-declared event context */
646 if (event->event_context) {
647 ret = generic_rw(pos, &event->event_context->p);
648 if (ret)
649 goto error;
650 }
651
652 /* Read and print event payload */
653 if (likely(event->event_fields)) {
654 ret = generic_rw(pos, &event->event_fields->p);
655 if (ret)
656 goto error;
657 }
658
659 return 0;
660
661 error:
662 fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
663 return ret;
664 }
665
666 /*
667 * One side-effect of this function is to unmap pos mmap base if one is
668 * mapped.
669 */
670 static
671 int find_data_offset(struct ctf_stream_pos *pos,
672 struct ctf_file_stream *file_stream,
673 struct packet_index *packet_index)
674 {
675 uint64_t packet_map_len = DEFAULT_HEADER_LEN, tmp_map_len;
676 struct stat filestats;
677 size_t filesize;
678 int ret;
679
680 pos = &file_stream->pos;
681
682 ret = fstat(pos->fd, &filestats);
683 if (ret < 0)
684 return ret;
685 filesize = filestats.st_size;
686
687 /* Deal with empty files */
688 if (!filesize) {
689 return 0;
690 }
691
692 begin:
693 if (filesize - pos->mmap_offset < (packet_map_len >> LOG2_CHAR_BIT)) {
694 packet_map_len = (filesize - pos->mmap_offset) << LOG2_CHAR_BIT;
695 }
696
697 if (pos->base_mma) {
698 /* unmap old base */
699 ret = munmap_align(pos->base_mma);
700 if (ret) {
701 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
702 strerror(errno));
703 return ret;
704 }
705 pos->base_mma = NULL;
706 }
707 /* map new base. Need mapping length from header. */
708 pos->base_mma = mmap_align(packet_map_len >> LOG2_CHAR_BIT, PROT_READ,
709 MAP_PRIVATE, pos->fd, pos->mmap_offset);
710 assert(pos->base_mma != MAP_FAILED);
711
712 pos->content_size = packet_map_len;
713 pos->packet_size = packet_map_len;
714 pos->offset = 0; /* Position of the packet header */
715
716 /* update trace_packet_header and stream_packet_context */
717 if (pos->prot == PROT_READ && file_stream->parent.trace_packet_header) {
718 /* Read packet header */
719 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
720 if (ret) {
721 if (ret == -EFAULT)
722 goto retry;
723 }
724 }
725 if (pos->prot == PROT_READ && file_stream->parent.stream_packet_context) {
726 /* Read packet context */
727 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
728 if (ret) {
729 if (ret == -EFAULT)
730 goto retry;
731 }
732 }
733 packet_index->data_offset = pos->offset;
734
735 /* unmap old base */
736 ret = munmap_align(pos->base_mma);
737 if (ret) {
738 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
739 strerror(errno));
740 return ret;
741 }
742 pos->base_mma = NULL;
743
744 return 0;
745
746 /* Retry with larger mapping */
747 retry:
748 if (packet_map_len == ((filesize - pos->mmap_offset) << LOG2_CHAR_BIT)) {
749 /*
750 * Reached EOF, but still expecting header/context data.
751 */
752 fprintf(stderr, "[error] Reached end of file, but still expecting header or context fields.\n");
753 return -EFAULT;
754 }
755 /* Double the mapping len, and retry */
756 tmp_map_len = packet_map_len << 1;
757 if (tmp_map_len >> 1 != packet_map_len) {
758 /* Overflow */
759 fprintf(stderr, "[error] Packet mapping length overflow\n");
760 return -EFAULT;
761 }
762 packet_map_len = tmp_map_len;
763 goto begin;
764 }
765
766
767 int ctf_init_pos(struct ctf_stream_pos *pos, struct bt_trace_descriptor *trace,
768 int fd, int open_flags)
769 {
770 pos->fd = fd;
771 if (fd >= 0) {
772 pos->packet_index = g_array_new(FALSE, TRUE,
773 sizeof(struct packet_index));
774 } else {
775 pos->packet_index = NULL;
776 }
777 switch (open_flags & O_ACCMODE) {
778 case O_RDONLY:
779 pos->prot = PROT_READ;
780 pos->flags = MAP_PRIVATE;
781 pos->parent.rw_table = read_dispatch_table;
782 pos->parent.event_cb = ctf_read_event;
783 pos->parent.trace = trace;
784 break;
785 case O_RDWR:
786 pos->prot = PROT_READ | PROT_WRITE;
787 pos->flags = MAP_SHARED;
788 pos->parent.rw_table = write_dispatch_table;
789 pos->parent.event_cb = ctf_write_event;
790 pos->parent.trace = trace;
791 break;
792 default:
793 assert(0);
794 }
795 return 0;
796 }
797
798 int ctf_fini_pos(struct ctf_stream_pos *pos)
799 {
800 if ((pos->prot & PROT_WRITE) && pos->content_size_loc)
801 *pos->content_size_loc = pos->offset;
802 if (pos->base_mma) {
803 int ret;
804
805 /* unmap old base */
806 ret = munmap_align(pos->base_mma);
807 if (ret) {
808 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
809 strerror(errno));
810 return -1;
811 }
812 }
813 if (pos->packet_index)
814 (void) g_array_free(pos->packet_index, TRUE);
815 return 0;
816 }
817
818 void ctf_update_current_packet_index(struct ctf_stream_definition *stream,
819 struct packet_index *prev_index,
820 struct packet_index *cur_index)
821 {
822 uint64_t events_discarded_diff;
823 uint64_t packets_lost_diff = 0;
824
825 /* Update packet index time information */
826
827 /* Current packet begin/end */
828 stream->current.real.begin =
829 cur_index->ts_real.timestamp_begin;
830 stream->current.cycles.begin =
831 cur_index->ts_cycles.timestamp_begin;
832 stream->current.real.end =
833 cur_index->ts_real.timestamp_end;
834 stream->current.cycles.end =
835 cur_index->ts_cycles.timestamp_end;
836
837 /* Update packet index discarded event information */
838 events_discarded_diff = cur_index->events_discarded;
839 if (prev_index) {
840 /* Previous packet begin/end */
841 stream->prev.cycles.begin =
842 prev_index->ts_cycles.timestamp_begin;
843 stream->prev.real.begin =
844 prev_index->ts_real.timestamp_begin;
845 stream->prev.cycles.end =
846 prev_index->ts_cycles.timestamp_end;
847 stream->prev.real.end =
848 prev_index->ts_real.timestamp_end;
849
850 events_discarded_diff -= prev_index->events_discarded;
851 /* packet_seq_num stays at 0 if not produced by the tracer */
852 if (cur_index->packet_seq_num) {
853 packets_lost_diff = cur_index->packet_seq_num -
854 prev_index->packet_seq_num - 1;
855 }
856 /*
857 * Deal with 32-bit wrap-around if the tracer provided a
858 * 32-bit field.
859 */
860 if (prev_index->events_discarded_len == 32) {
861 events_discarded_diff = (uint32_t) events_discarded_diff;
862 }
863 } else {
864 /*
865 * First packet: use current packet info as limits for
866 * previous packet.
867 */
868 stream->prev.cycles.begin =
869 stream->prev.cycles.end =
870 stream->current.cycles.begin;
871 stream->prev.real.begin =
872 stream->prev.real.end =
873 stream->current.real.begin;
874 }
875 stream->events_discarded = events_discarded_diff;
876 stream->packets_lost = packets_lost_diff;
877 }
878
879 /*
880 * Find the timerange where all the streams in the trace are active
881 * simultaneously.
882 *
883 * Return 0 and update begin/end if necessary on success, return 1 for
884 * empty streams and return a negative value on error.
885 */
886 static
887 int ctf_find_stream_intersection(struct bt_trace_descriptor *td_read,
888 struct packet_index_time *_real,
889 struct packet_index_time *_cycles)
890 {
891 int stream_id, ret = 0;
892 struct packet_index_time real = { 0, UINT64_MAX },
893 cycles = { 0, UINT64_MAX };
894 struct ctf_trace *tin = container_of(td_read, struct ctf_trace, parent);
895
896 /* At least one of the two return args must be provided. */
897 if (!_real && !_cycles) {
898 ret = -1;
899 goto end;
900 }
901
902 if (tin->streams->len == 0) {
903 ret = 1;
904 goto end;
905 }
906
907 for (stream_id = 0; stream_id < tin->streams->len;
908 stream_id++) {
909 int filenr;
910 struct ctf_stream_declaration *stream_class;
911
912 stream_class = g_ptr_array_index(tin->streams, stream_id);
913 if (!stream_class) {
914 continue;
915 }
916 for (filenr = 0; filenr < stream_class->streams->len; filenr++) {
917 struct ctf_file_stream *file_stream;
918 struct ctf_stream_pos *stream_pos;
919 struct packet_index *index;
920
921 file_stream = g_ptr_array_index(stream_class->streams,
922 filenr);
923 if (!file_stream) {
924 continue;
925 }
926 stream_pos = &file_stream->pos;
927 if (!stream_pos->packet_index ||
928 stream_pos->packet_index->len <= 0) {
929 ret = 1;
930 goto end;
931 }
932 index = &g_array_index(stream_pos->packet_index,
933 struct packet_index, 0);
934 real.timestamp_begin = max(real.timestamp_begin,
935 index->ts_real.timestamp_begin);
936 cycles.timestamp_begin = max(cycles.timestamp_begin,
937 index->ts_cycles.timestamp_begin);
938
939 index = &g_array_index(stream_pos->packet_index,
940 struct packet_index,
941 stream_pos->packet_index->len - 1);
942 real.timestamp_end = min(real.timestamp_end,
943 index->ts_real.timestamp_end);
944 cycles.timestamp_end = min(cycles.timestamp_end,
945 index->ts_cycles.timestamp_end);
946 }
947 }
948 end:
949 if (ret == 0) {
950 if (_real) {
951 *_real = real;
952 }
953 if (_cycles) {
954 *_cycles = cycles;
955 }
956 }
957 return ret;
958 }
959
960 /*
961 * Find the union of all active regions in the trace collection's traces.
962 * Returns "real" timestamps.
963 *
964 * Return 0 on success.
965 * Return 1 if no intersections are found.
966 * Return a negative value on error.
967 */
968 int ctf_find_tc_stream_packet_intersection_union(struct bt_context *ctx,
969 uint64_t *_ts_begin, uint64_t *_ts_end)
970 {
971 int ret = 0, i;
972 uint64_t ts_begin = UINT64_MAX, ts_end = 0;
973
974 if (!ctx || !ctx->tc || !ctx->tc->array || !_ts_begin || !_ts_end) {
975 ret = -EINVAL;
976 goto end;
977 }
978
979 for (i = 0; i < ctx->tc->array->len; i++) {
980 struct bt_trace_descriptor *td_read;
981 struct packet_index_time intersection_real;
982
983 td_read = g_ptr_array_index(ctx->tc->array, i);
984 if (!td_read) {
985 continue;
986 }
987 ret = ctf_find_stream_intersection(td_read, &intersection_real,
988 NULL);
989 if (ret == 1) {
990 /* Empty trace or no stream intersection. */
991 continue;
992 } else if (ret < 0) {
993 goto end;
994 }
995
996 ts_begin = min(intersection_real.timestamp_begin, ts_begin);
997 ts_end = max(intersection_real.timestamp_end, ts_end);
998 }
999
1000 if (ts_end < ts_begin) {
1001 ret = 1;
1002 goto end;
1003 }
1004 *_ts_begin = ts_begin;
1005 *_ts_end = ts_end;
1006 end:
1007 return ret;
1008 }
1009
1010 int ctf_tc_set_stream_intersection_mode(struct bt_context *ctx)
1011 {
1012 int ret = 0, i;
1013
1014 if (!ctx || !ctx->tc || !ctx->tc->array) {
1015 ret = -EINVAL;
1016 goto end;
1017 }
1018
1019 for (i = 0; i < ctx->tc->array->len; i++) {
1020 struct bt_trace_descriptor *td_read;
1021 struct packet_index_time intersection_real;
1022
1023 td_read = g_ptr_array_index(ctx->tc->array, i);
1024 if (!td_read) {
1025 continue;
1026 }
1027
1028 ret = ctf_find_stream_intersection(td_read, &intersection_real,
1029 NULL);
1030 if (ret == 1) {
1031 /* Empty trace or no stream intersection. */
1032 continue;
1033 } else if (ret < 0) {
1034 goto end;
1035 }
1036
1037 td_read->interval_real = intersection_real;
1038 td_read->interval_set = true;
1039 }
1040 end:
1041 return ret;
1042 }
1043
1044 /*
1045 * for SEEK_CUR: go to next packet.
1046 * for SEEK_SET: go to packet numer (index).
1047 */
1048 void ctf_packet_seek(struct bt_stream_pos *stream_pos, size_t index, int whence)
1049 {
1050 struct ctf_stream_pos *pos =
1051 container_of(stream_pos, struct ctf_stream_pos, parent);
1052 struct ctf_file_stream *file_stream =
1053 container_of(pos, struct ctf_file_stream, pos);
1054 int ret;
1055 struct packet_index *packet_index, *prev_index;
1056
1057 switch (whence) {
1058 case SEEK_CUR:
1059 case SEEK_SET: /* Fall-through */
1060 break; /* OK */
1061 default:
1062 ret = -1;
1063 goto end;
1064 }
1065
1066 if ((pos->prot & PROT_WRITE) && pos->content_size_loc)
1067 *pos->content_size_loc = pos->offset;
1068
1069 if (pos->base_mma) {
1070 /* unmap old base */
1071 ret = munmap_align(pos->base_mma);
1072 if (ret) {
1073 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1074 strerror(errno));
1075 ret = -1;
1076 goto end;
1077 }
1078 pos->base_mma = NULL;
1079 }
1080
1081 /*
1082 * The caller should never ask for ctf_move_pos across packets,
1083 * except to get exactly at the beginning of the next packet.
1084 */
1085 if (pos->prot & PROT_WRITE) {
1086 switch (whence) {
1087 case SEEK_CUR:
1088 /* The writer will add padding */
1089 pos->mmap_offset += pos->packet_size / CHAR_BIT;
1090 break;
1091 case SEEK_SET:
1092 assert(index == 0); /* only seek supported for now */
1093 pos->cur_index = 0;
1094 break;
1095 default:
1096 ret = -1;
1097 goto end;
1098 }
1099 pos->content_size = -1U; /* Unknown at this point */
1100 pos->packet_size = WRITE_PACKET_LEN;
1101 do {
1102 ret = bt_posix_fallocate(pos->fd, pos->mmap_offset,
1103 pos->packet_size / CHAR_BIT);
1104 } while (ret == EINTR);
1105 assert(ret == 0);
1106 pos->offset = 0;
1107 } else {
1108 read_next_packet:
1109 switch (whence) {
1110 case SEEK_CUR:
1111 {
1112 if (pos->offset == EOF) {
1113 ret = 0;
1114 goto end;
1115 }
1116 assert(pos->cur_index < pos->packet_index->len);
1117 /* The reader will expect us to skip padding */
1118 ++pos->cur_index;
1119 break;
1120 }
1121 case SEEK_SET:
1122 if (index >= pos->packet_index->len) {
1123 pos->offset = EOF;
1124 ret = 0;
1125 goto end;
1126 }
1127 pos->cur_index = index;
1128 break;
1129 default:
1130 ret = -1;
1131 goto end;
1132 }
1133
1134 if (pos->cur_index >= pos->packet_index->len) {
1135 pos->offset = EOF;
1136 ret = 0;
1137 goto end;
1138 }
1139
1140 packet_index = &g_array_index(pos->packet_index,
1141 struct packet_index, pos->cur_index);
1142 if (pos->cur_index > 0) {
1143 prev_index = &g_array_index(pos->packet_index,
1144 struct packet_index,
1145 pos->cur_index - 1);
1146 } else {
1147 prev_index = NULL;
1148 }
1149 ctf_update_current_packet_index(&file_stream->parent,
1150 prev_index, packet_index);
1151
1152 if (pos->cur_index >= pos->packet_index->len) {
1153 pos->offset = EOF;
1154 ret = 0;
1155 goto end;
1156 }
1157
1158 /*
1159 * We need to check if we are in trace read or called
1160 * from packet indexing. In this last case, the
1161 * collection is not there, so we cannot print the
1162 * timestamps.
1163 */
1164 if ((&file_stream->parent)->stream_class->trace->parent.collection) {
1165 ctf_print_discarded_lost(stderr, &file_stream->parent);
1166 }
1167
1168 packet_index = &g_array_index(pos->packet_index,
1169 struct packet_index,
1170 pos->cur_index);
1171 file_stream->parent.cycles_timestamp = packet_index->ts_cycles.timestamp_begin;
1172
1173 file_stream->parent.real_timestamp = packet_index->ts_real.timestamp_begin;
1174
1175 /* Lookup context/packet size in index */
1176 if (packet_index->data_offset == -1) {
1177 ret = find_data_offset(pos, file_stream, packet_index);
1178 if (ret < 0) {
1179 ret = -1;
1180 goto end;
1181 }
1182 }
1183 pos->content_size = packet_index->content_size;
1184 pos->packet_size = packet_index->packet_size;
1185 pos->mmap_offset = packet_index->offset;
1186 pos->data_offset = packet_index->data_offset;
1187 if (pos->data_offset < packet_index->content_size) {
1188 pos->offset = 0; /* will read headers */
1189 } else if (pos->data_offset == packet_index->content_size) {
1190 /* empty packet */
1191 pos->offset = packet_index->data_offset;
1192 whence = SEEK_CUR;
1193 goto read_next_packet;
1194 } else {
1195 pos->offset = EOF;
1196 ret = 0;
1197 goto end;
1198 }
1199 }
1200 /* map new base. Need mapping length from header. */
1201 pos->base_mma = mmap_align(pos->packet_size / CHAR_BIT, pos->prot,
1202 pos->flags, pos->fd, pos->mmap_offset);
1203 if (pos->base_mma == MAP_FAILED) {
1204 fprintf(stderr, "[error] mmap error %s.\n",
1205 strerror(errno));
1206 assert(0);
1207 }
1208
1209 /* update trace_packet_header and stream_packet_context */
1210 if (!(pos->prot & PROT_WRITE) &&
1211 file_stream->parent.trace_packet_header) {
1212 /* Read packet header */
1213 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1214 assert(!ret);
1215 }
1216 if (!(pos->prot & PROT_WRITE) &&
1217 file_stream->parent.stream_packet_context) {
1218 /* Read packet context */
1219 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1220 assert(!ret);
1221 }
1222 ret = 0;
1223 end:
1224 bt_packet_seek_set_error(ret);
1225 }
1226
1227 static
1228 int packet_metadata(struct ctf_trace *td, FILE *fp)
1229 {
1230 uint32_t magic;
1231 size_t len;
1232 int ret = 0;
1233
1234 len = fread(&magic, sizeof(magic), 1, fp);
1235 if (len != 1) {
1236 goto end;
1237 }
1238 if (magic == TSDL_MAGIC) {
1239 ret = 1;
1240 td->byte_order = BYTE_ORDER;
1241 CTF_TRACE_SET_FIELD(td, byte_order);
1242 } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) {
1243 ret = 1;
1244 td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ?
1245 LITTLE_ENDIAN : BIG_ENDIAN;
1246 CTF_TRACE_SET_FIELD(td, byte_order);
1247 }
1248 end:
1249 rewind(fp);
1250 return ret;
1251 }
1252
1253 /*
1254 * Returns 0 on success, -1 on error.
1255 */
1256 static
1257 int check_version(unsigned int major, unsigned int minor)
1258 {
1259 switch (major) {
1260 case 1:
1261 switch (minor) {
1262 case 8:
1263 return 0;
1264 default:
1265 goto warning;
1266 }
1267 default:
1268 goto warning;
1269
1270 }
1271
1272 /* eventually return an error instead of warning */
1273 warning:
1274 fprintf(stderr, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n",
1275 major, minor);
1276 return 0;
1277 }
1278
1279 static
1280 int ctf_trace_metadata_packet_read(struct ctf_trace *td, FILE *in,
1281 FILE *out)
1282 {
1283 struct metadata_packet_header header;
1284 size_t readlen, writelen, toread;
1285 char buf[4096 + 1]; /* + 1 for debug-mode \0 */
1286 int ret = 0;
1287
1288 readlen = fread(&header, header_sizeof(header), 1, in);
1289 if (readlen < 1)
1290 return -EINVAL;
1291
1292 if (td->byte_order != BYTE_ORDER) {
1293 header.magic = GUINT32_SWAP_LE_BE(header.magic);
1294 header.checksum = GUINT32_SWAP_LE_BE(header.checksum);
1295 header.content_size = GUINT32_SWAP_LE_BE(header.content_size);
1296 header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size);
1297 }
1298 if (header.checksum)
1299 fprintf(stderr, "[warning] checksum verification not supported yet.\n");
1300 if (header.compression_scheme) {
1301 fprintf(stderr, "[error] compression (%u) not supported yet.\n",
1302 header.compression_scheme);
1303 return -EINVAL;
1304 }
1305 if (header.encryption_scheme) {
1306 fprintf(stderr, "[error] encryption (%u) not supported yet.\n",
1307 header.encryption_scheme);
1308 return -EINVAL;
1309 }
1310 if (header.checksum_scheme) {
1311 fprintf(stderr, "[error] checksum (%u) not supported yet.\n",
1312 header.checksum_scheme);
1313 return -EINVAL;
1314 }
1315 if (check_version(header.major, header.minor) < 0)
1316 return -EINVAL;
1317 if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) {
1318 memcpy(td->uuid, header.uuid, sizeof(header.uuid));
1319 CTF_TRACE_SET_FIELD(td, uuid);
1320 } else {
1321 if (bt_uuid_compare(header.uuid, td->uuid))
1322 return -EINVAL;
1323 }
1324
1325 if ((header.content_size / CHAR_BIT) < header_sizeof(header))
1326 return -EINVAL;
1327
1328 toread = (header.content_size / CHAR_BIT) - header_sizeof(header);
1329
1330 for (;;) {
1331 readlen = fread(buf, sizeof(char), min(sizeof(buf) - 1, toread), in);
1332 if (ferror(in)) {
1333 ret = -EINVAL;
1334 break;
1335 }
1336 if (babeltrace_debug) {
1337 buf[readlen] = '\0';
1338 fprintf(stderr, "[debug] metadata packet read: %s\n",
1339 buf);
1340 }
1341
1342 writelen = fwrite(buf, sizeof(char), readlen, out);
1343 if (writelen < readlen) {
1344 ret = -EIO;
1345 break;
1346 }
1347 if (ferror(out)) {
1348 ret = -EINVAL;
1349 break;
1350 }
1351 toread -= readlen;
1352 if (!toread) {
1353 ret = 0; /* continue reading next packet */
1354 goto read_padding;
1355 }
1356 }
1357 return ret;
1358
1359 read_padding:
1360 toread = (header.packet_size - header.content_size) / CHAR_BIT;
1361 ret = fseek(in, toread, SEEK_CUR);
1362 if (ret < 0) {
1363 fprintf(stderr, "[warning] Missing padding at end of file\n");
1364 ret = 0;
1365 }
1366 return ret;
1367 }
1368
1369 static
1370 int ctf_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
1371 char **buf)
1372 {
1373 FILE *in, *out;
1374 size_t size, buflen;
1375 int ret;
1376
1377 in = *fp;
1378 /*
1379 * Using strlen on *buf instead of size of open_memstream
1380 * because its size includes garbage at the end (after final
1381 * \0). This is the allocated size, not the actual string size.
1382 */
1383 out = babeltrace_open_memstream(buf, &size);
1384 if (out == NULL) {
1385 perror("Metadata open_memstream");
1386 return -errno;
1387 }
1388 for (;;) {
1389 ret = ctf_trace_metadata_packet_read(td, in, out);
1390 if (ret) {
1391 break;
1392 }
1393 if (feof(in)) {
1394 ret = 0;
1395 break;
1396 }
1397 }
1398 /* close to flush the buffer */
1399 ret = babeltrace_close_memstream(buf, &size, out);
1400 if (ret < 0) {
1401 int closeret;
1402
1403 perror("babeltrace_flush_memstream");
1404 ret = -errno;
1405 closeret = fclose(in);
1406 if (closeret) {
1407 perror("Error in fclose");
1408 }
1409 return ret;
1410 }
1411 ret = fclose(in);
1412 if (ret) {
1413 perror("Error in fclose");
1414 }
1415 /* open for reading */
1416 buflen = strlen(*buf);
1417 if (!buflen) {
1418 *fp = NULL;
1419 return -ENOENT;
1420 }
1421 *fp = babeltrace_fmemopen(*buf, buflen, "rb");
1422 if (!*fp) {
1423 perror("Metadata fmemopen");
1424 return -errno;
1425 }
1426 return 0;
1427 }
1428
1429 static
1430 int ctf_trace_metadata_read(struct ctf_trace *td, FILE *metadata_fp,
1431 struct ctf_scanner *scanner, int append)
1432 {
1433 struct ctf_file_stream *metadata_stream;
1434 FILE *fp;
1435 char *buf = NULL;
1436 int ret = 0, closeret;
1437
1438 metadata_stream = g_new0(struct ctf_file_stream, 1);
1439 metadata_stream->pos.last_offset = LAST_OFFSET_POISON;
1440
1441 if (metadata_fp) {
1442 fp = metadata_fp;
1443 metadata_stream->pos.fd = -1;
1444 } else {
1445 td->metadata = &metadata_stream->parent;
1446 metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
1447 if (metadata_stream->pos.fd < 0) {
1448 fprintf(stderr, "Unable to open metadata.\n");
1449 ret = -1;
1450 goto end_free;
1451 }
1452
1453 fp = fdopen(metadata_stream->pos.fd, "r");
1454 if (!fp) {
1455 fprintf(stderr, "[error] Unable to open metadata stream.\n");
1456 perror("Metadata stream open");
1457 ret = -errno;
1458 goto end_stream;
1459 }
1460 /* fd now belongs to fp */
1461 metadata_stream->pos.fd = -1;
1462 }
1463 if (babeltrace_debug)
1464 yydebug = 1;
1465
1466 if (packet_metadata(td, fp)) {
1467 ret = ctf_trace_metadata_stream_read(td, &fp, &buf);
1468 if (ret) {
1469 goto end;
1470 }
1471 td->metadata_string = buf;
1472 td->metadata_packetized = 1;
1473 } else {
1474 if (!append) {
1475 unsigned int major, minor;
1476 ssize_t nr_items;
1477
1478 td->byte_order = BYTE_ORDER;
1479
1480 /* Check text-only metadata header and version */
1481 nr_items = fscanf(fp, "/* CTF %10u.%10u", &major, &minor);
1482 if (nr_items < 2)
1483 fprintf(stderr, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
1484 if (check_version(major, minor) < 0) {
1485 ret = -EINVAL;
1486 goto end;
1487 }
1488 rewind(fp);
1489 }
1490 }
1491
1492 ret = ctf_scanner_append_ast(scanner, fp);
1493 if (ret) {
1494 fprintf(stderr, "[error] Error creating AST\n");
1495 goto end;
1496 }
1497
1498 if (babeltrace_debug) {
1499 ret = ctf_visitor_print_xml(stderr, 0, &scanner->ast->root);
1500 if (ret) {
1501 fprintf(stderr, "[error] Error visiting AST for XML output\n");
1502 goto end;
1503 }
1504 }
1505
1506 ret = ctf_visitor_semantic_check(stderr, 0, &scanner->ast->root);
1507 if (ret) {
1508 fprintf(stderr, "[error] Error in CTF semantic validation %d\n", ret);
1509 goto end;
1510 }
1511 ret = ctf_visitor_construct_metadata(stderr, 0, &scanner->ast->root,
1512 td, td->byte_order);
1513 if (ret) {
1514 fprintf(stderr, "[error] Error in CTF metadata constructor %d\n", ret);
1515 goto end;
1516 }
1517 end:
1518 if (fp) {
1519 closeret = fclose(fp);
1520 if (closeret) {
1521 perror("Error on fclose");
1522 }
1523 }
1524 end_stream:
1525 if (metadata_stream->pos.fd >= 0) {
1526 closeret = close(metadata_stream->pos.fd);
1527 if (closeret) {
1528 perror("Error on metadata stream fd close");
1529 }
1530 }
1531 end_free:
1532 if (ret)
1533 g_free(metadata_stream);
1534 return ret;
1535 }
1536
1537 static
1538 struct ctf_event_definition *create_event_definitions(struct ctf_trace *td,
1539 struct ctf_stream_definition *stream,
1540 struct ctf_event_declaration *event)
1541 {
1542 struct ctf_event_definition *stream_event = g_new0(struct ctf_event_definition, 1);
1543
1544 if (event->context_decl) {
1545 struct bt_definition *definition =
1546 event->context_decl->p.definition_new(&event->context_decl->p,
1547 stream->parent_def_scope, 0, 0, "event.context");
1548 if (!definition) {
1549 goto error;
1550 }
1551 stream_event->event_context = container_of(definition,
1552 struct definition_struct, p);
1553 stream->parent_def_scope = stream_event->event_context->p.scope;
1554 }
1555 if (event->fields_decl) {
1556 struct bt_definition *definition =
1557 event->fields_decl->p.definition_new(&event->fields_decl->p,
1558 stream->parent_def_scope, 0, 0, "event.fields");
1559 if (!definition) {
1560 goto error;
1561 }
1562 stream_event->event_fields = container_of(definition,
1563 struct definition_struct, p);
1564 stream->parent_def_scope = stream_event->event_fields->p.scope;
1565 }
1566 stream_event->stream = stream;
1567 return stream_event;
1568
1569 error:
1570 if (stream_event->event_fields)
1571 bt_definition_unref(&stream_event->event_fields->p);
1572 if (stream_event->event_context)
1573 bt_definition_unref(&stream_event->event_context->p);
1574 fprintf(stderr, "[error] Unable to create event definition for event \"%s\".\n",
1575 g_quark_to_string(event->name));
1576 return NULL;
1577 }
1578
1579 static
1580 int copy_event_declarations_stream_class_to_stream(struct ctf_trace *td,
1581 struct ctf_stream_declaration *stream_class,
1582 struct ctf_stream_definition *stream)
1583 {
1584 size_t def_size, class_size, i;
1585 int ret = 0;
1586
1587 def_size = stream->events_by_id->len;
1588 class_size = stream_class->events_by_id->len;
1589
1590 g_ptr_array_set_size(stream->events_by_id, class_size);
1591 for (i = def_size; i < class_size; i++) {
1592 struct ctf_event_declaration *event =
1593 g_ptr_array_index(stream_class->events_by_id, i);
1594 struct ctf_event_definition *stream_event;
1595
1596 if (!event)
1597 continue;
1598 stream_event = create_event_definitions(td, stream, event);
1599 if (!stream_event) {
1600 ret = -EINVAL;
1601 goto error;
1602 }
1603 g_ptr_array_index(stream->events_by_id, i) = stream_event;
1604 }
1605 error:
1606 return ret;
1607 }
1608
1609 static
1610 int create_stream_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1611 {
1612 struct ctf_stream_declaration *stream_class;
1613 int ret;
1614 int i;
1615
1616 if (stream->stream_definitions_created)
1617 return 0;
1618
1619 stream_class = stream->stream_class;
1620
1621 if (stream_class->packet_context_decl) {
1622 struct bt_definition *definition =
1623 stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p,
1624 stream->parent_def_scope, 0, 0, "stream.packet.context");
1625 if (!definition) {
1626 ret = -EINVAL;
1627 goto error;
1628 }
1629 stream->stream_packet_context = container_of(definition,
1630 struct definition_struct, p);
1631 stream->parent_def_scope = stream->stream_packet_context->p.scope;
1632 }
1633 if (stream_class->event_header_decl) {
1634 struct bt_definition *definition =
1635 stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p,
1636 stream->parent_def_scope, 0, 0, "stream.event.header");
1637 if (!definition) {
1638 ret = -EINVAL;
1639 goto error;
1640 }
1641 stream->stream_event_header =
1642 container_of(definition, struct definition_struct, p);
1643 stream->parent_def_scope = stream->stream_event_header->p.scope;
1644 }
1645 if (stream_class->event_context_decl) {
1646 struct bt_definition *definition =
1647 stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p,
1648 stream->parent_def_scope, 0, 0, "stream.event.context");
1649 if (!definition) {
1650 ret = -EINVAL;
1651 goto error;
1652 }
1653 stream->stream_event_context =
1654 container_of(definition, struct definition_struct, p);
1655 stream->parent_def_scope = stream->stream_event_context->p.scope;
1656 }
1657 stream->events_by_id = g_ptr_array_new();
1658 ret = copy_event_declarations_stream_class_to_stream(td,
1659 stream_class, stream);
1660 if (ret)
1661 goto error_event;
1662 return 0;
1663
1664 error_event:
1665 for (i = 0; i < stream->events_by_id->len; i++) {
1666 struct ctf_event_definition *stream_event = g_ptr_array_index(stream->events_by_id, i);
1667 if (stream_event)
1668 g_free(stream_event);
1669 }
1670 g_ptr_array_free(stream->events_by_id, TRUE);
1671 error:
1672 if (stream->stream_event_context)
1673 bt_definition_unref(&stream->stream_event_context->p);
1674 if (stream->stream_event_header)
1675 bt_definition_unref(&stream->stream_event_header->p);
1676 if (stream->stream_packet_context)
1677 bt_definition_unref(&stream->stream_packet_context->p);
1678 fprintf(stderr, "[error] Unable to create stream (%" PRIu64 ") definitions: %s\n",
1679 stream_class->stream_id, strerror(-ret));
1680 return ret;
1681 }
1682
1683 static
1684 int stream_assign_class(struct ctf_trace *td,
1685 struct ctf_file_stream *file_stream,
1686 uint64_t stream_id)
1687 {
1688 struct ctf_stream_declaration *stream;
1689 int ret;
1690
1691 file_stream->parent.stream_id = stream_id;
1692 if (stream_id >= td->streams->len) {
1693 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1694 return -EINVAL;
1695 }
1696 stream = g_ptr_array_index(td->streams, stream_id);
1697 if (!stream) {
1698 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1699 return -EINVAL;
1700 }
1701 file_stream->parent.stream_class = stream;
1702 ret = create_stream_definitions(td, &file_stream->parent);
1703 if (ret)
1704 return ret;
1705 return 0;
1706 }
1707
1708 static
1709 int create_stream_one_packet_index(struct ctf_stream_pos *pos,
1710 struct ctf_trace *td,
1711 struct ctf_file_stream *file_stream,
1712 size_t filesize)
1713 {
1714 struct packet_index packet_index;
1715 uint64_t stream_id = 0;
1716 uint64_t packet_map_len = DEFAULT_HEADER_LEN, tmp_map_len;
1717 int first_packet = 0;
1718 int len_index;
1719 int ret;
1720
1721 begin:
1722 memset(&packet_index, 0, sizeof(packet_index));
1723 if (!pos->mmap_offset) {
1724 first_packet = 1;
1725 }
1726
1727 if (filesize - pos->mmap_offset < (packet_map_len >> LOG2_CHAR_BIT)) {
1728 packet_map_len = (filesize - pos->mmap_offset) << LOG2_CHAR_BIT;
1729 }
1730
1731 if (pos->base_mma) {
1732 /* unmap old base */
1733 ret = munmap_align(pos->base_mma);
1734 if (ret) {
1735 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1736 strerror(errno));
1737 return ret;
1738 }
1739 pos->base_mma = NULL;
1740 }
1741 /* map new base. Need mapping length from header. */
1742 pos->base_mma = mmap_align(packet_map_len >> LOG2_CHAR_BIT, PROT_READ,
1743 MAP_PRIVATE, pos->fd, pos->mmap_offset);
1744 assert(pos->base_mma != MAP_FAILED);
1745 /*
1746 * Use current mapping size as temporary content and packet
1747 * size.
1748 */
1749 pos->content_size = packet_map_len;
1750 pos->packet_size = packet_map_len;
1751 pos->offset = 0; /* Position of the packet header */
1752
1753 packet_index.offset = pos->mmap_offset;
1754
1755 /* read and check header, set stream id (and check) */
1756 if (file_stream->parent.trace_packet_header) {
1757 /* Read packet header */
1758 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1759 if (ret) {
1760 if (ret == -EFAULT)
1761 goto retry;
1762 fprintf(stderr, "[error] Unable to read packet header: %s\n", strerror(-ret));
1763 return ret;
1764 }
1765 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic"));
1766 if (len_index >= 0) {
1767 struct bt_definition *field;
1768 uint64_t magic;
1769
1770 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1771 magic = bt_get_unsigned_int(field);
1772 if (magic != CTF_MAGIC) {
1773 fprintf(stderr, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
1774 magic,
1775 file_stream->pos.packet_index->len,
1776 (ssize_t) pos->mmap_offset);
1777 return -EINVAL;
1778 }
1779 }
1780
1781 /* check uuid */
1782 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid"));
1783 if (len_index >= 0) {
1784 struct definition_array *defarray;
1785 struct bt_definition *field;
1786 uint64_t i;
1787 uint8_t uuidval[BABELTRACE_UUID_LEN];
1788
1789 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1790 assert(field->declaration->id == CTF_TYPE_ARRAY);
1791 defarray = container_of(field, struct definition_array, p);
1792 assert(bt_array_len(defarray) == BABELTRACE_UUID_LEN);
1793
1794 for (i = 0; i < BABELTRACE_UUID_LEN; i++) {
1795 struct bt_definition *elem;
1796
1797 elem = bt_array_index(defarray, i);
1798 uuidval[i] = bt_get_unsigned_int(elem);
1799 }
1800 ret = bt_uuid_compare(td->uuid, uuidval);
1801 if (ret) {
1802 fprintf(stderr, "[error] Unique Universal Identifiers do not match.\n");
1803 return -EINVAL;
1804 }
1805 }
1806
1807 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id"));
1808 if (len_index >= 0) {
1809 struct bt_definition *field;
1810
1811 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1812 stream_id = bt_get_unsigned_int(field);
1813 }
1814 }
1815
1816 if (!first_packet && file_stream->parent.stream_id != stream_id) {
1817 fprintf(stderr, "[error] Stream ID is changing within a stream: expecting %" PRIu64 ", but packet has %" PRIu64 "\n",
1818 stream_id,
1819 file_stream->parent.stream_id);
1820 return -EINVAL;
1821 }
1822 if (first_packet) {
1823 ret = stream_assign_class(td, file_stream, stream_id);
1824 if (ret)
1825 return ret;
1826 }
1827
1828 if (file_stream->parent.stream_packet_context) {
1829 /* Read packet context */
1830 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1831 if (ret) {
1832 if (ret == -EFAULT)
1833 goto retry;
1834 fprintf(stderr, "[error] Unable to read packet context: %s\n", strerror(-ret));
1835 return ret;
1836 }
1837 /* read packet size from header */
1838 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size"));
1839 if (len_index >= 0) {
1840 struct bt_definition *field;
1841
1842 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1843 packet_index.packet_size = bt_get_unsigned_int(field);
1844 } else {
1845 /* Use file size for packet size */
1846 packet_index.packet_size = filesize * CHAR_BIT;
1847 }
1848
1849 /* read content size from header */
1850 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size"));
1851 if (len_index >= 0) {
1852 struct bt_definition *field;
1853
1854 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1855 packet_index.content_size = bt_get_unsigned_int(field);
1856 } else {
1857 /* Use packet size if non-zero, else file size */
1858 packet_index.content_size = packet_index.packet_size ? : filesize * CHAR_BIT;
1859 }
1860
1861 /* read timestamp begin from header */
1862 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin"));
1863 if (len_index >= 0) {
1864 struct bt_definition *field;
1865
1866 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1867 packet_index.ts_cycles.timestamp_begin = bt_get_unsigned_int(field);
1868 if (file_stream->parent.stream_class->trace->parent.collection) {
1869 packet_index.ts_real.timestamp_begin =
1870 ctf_get_real_timestamp(
1871 &file_stream->parent,
1872 packet_index.ts_cycles.timestamp_begin);
1873 }
1874 }
1875
1876 /* read timestamp end from header */
1877 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end"));
1878 if (len_index >= 0) {
1879 struct bt_definition *field;
1880
1881 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1882 packet_index.ts_cycles.timestamp_end = bt_get_unsigned_int(field);
1883 if (file_stream->parent.stream_class->trace->parent.collection) {
1884 packet_index.ts_real.timestamp_end =
1885 ctf_get_real_timestamp(
1886 &file_stream->parent,
1887 packet_index.ts_cycles.timestamp_end);
1888 }
1889 }
1890
1891 /* read events discarded from header */
1892 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("events_discarded"));
1893 if (len_index >= 0) {
1894 struct bt_definition *field;
1895
1896 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1897 packet_index.events_discarded = bt_get_unsigned_int(field);
1898 packet_index.events_discarded_len = bt_get_int_len(field);
1899 }
1900
1901 /* read packet_seq_num from header */
1902 len_index = bt_struct_declaration_lookup_field_index(
1903 file_stream->parent.stream_packet_context->declaration,
1904 g_quark_from_static_string("packet_seq_num"));
1905 if (len_index >= 0) {
1906 struct bt_definition *field;
1907
1908 field = bt_struct_definition_get_field_from_index(
1909 file_stream->parent.stream_packet_context,
1910 len_index);
1911 packet_index.packet_seq_num = bt_get_unsigned_int(field);
1912 }
1913 } else {
1914 /* Use file size for packet size */
1915 packet_index.packet_size = filesize * CHAR_BIT;
1916 /* Use packet size if non-zero, else file size */
1917 packet_index.content_size = packet_index.packet_size ? : filesize * CHAR_BIT;
1918 }
1919
1920 /* Validate content size and packet size values */
1921 if (packet_index.content_size > packet_index.packet_size) {
1922 fprintf(stderr, "[error] Content size (%" PRIu64 " bits) is larger than packet size (%" PRIu64 " bits).\n",
1923 packet_index.content_size, packet_index.packet_size);
1924 return -EINVAL;
1925 }
1926
1927 if (packet_index.packet_size > ((uint64_t) filesize - packet_index.offset) * CHAR_BIT) {
1928 fprintf(stderr, "[error] Packet size (%" PRIu64 " bits) is larger than remaining file size (%" PRIu64 " bits).\n",
1929 packet_index.packet_size, ((uint64_t) filesize - packet_index.offset) * CHAR_BIT);
1930 return -EINVAL;
1931 }
1932
1933 if (packet_index.content_size < pos->offset) {
1934 fprintf(stderr, "[error] Invalid CTF stream: content size is smaller than packet headers.\n");
1935 return -EINVAL;
1936 }
1937
1938 if ((packet_index.packet_size >> LOG2_CHAR_BIT) == 0) {
1939 fprintf(stderr, "[error] Invalid CTF stream: packet size needs to be at least one byte\n");
1940 return -EINVAL;
1941 }
1942
1943 /* Save position after header and context */
1944 packet_index.data_offset = pos->offset;
1945
1946 /* add index to packet array */
1947 g_array_append_val(file_stream->pos.packet_index, packet_index);
1948
1949 pos->mmap_offset += packet_index.packet_size >> LOG2_CHAR_BIT;
1950
1951 return 0;
1952
1953 /* Retry with larger mapping */
1954 retry:
1955 if (packet_map_len == ((filesize - pos->mmap_offset) << LOG2_CHAR_BIT)) {
1956 /*
1957 * Reached EOF, but still expecting header/context data.
1958 */
1959 fprintf(stderr, "[error] Reached end of file, but still expecting header or context fields.\n");
1960 return -EFAULT;
1961 }
1962 /* Double the mapping len, and retry */
1963 tmp_map_len = packet_map_len << 1;
1964 if (tmp_map_len >> 1 != packet_map_len) {
1965 /* Overflow */
1966 fprintf(stderr, "[error] Packet mapping length overflow\n");
1967 return -EFAULT;
1968 }
1969 packet_map_len = tmp_map_len;
1970 goto begin;
1971 }
1972
1973 static
1974 int create_stream_packet_index(struct ctf_trace *td,
1975 struct ctf_file_stream *file_stream)
1976 {
1977 struct ctf_stream_pos *pos;
1978 struct stat filestats;
1979 int ret;
1980
1981 pos = &file_stream->pos;
1982
1983 ret = fstat(pos->fd, &filestats);
1984 if (ret < 0)
1985 return ret;
1986
1987 /* Deal with empty files */
1988 if (!filestats.st_size) {
1989 if (file_stream->parent.trace_packet_header
1990 || file_stream->parent.stream_packet_context) {
1991 /*
1992 * We expect a trace packet header and/or stream packet
1993 * context. Since a trace needs to have at least one
1994 * packet, empty files are therefore not accepted.
1995 */
1996 fprintf(stderr, "[error] Encountered an empty file, but expecting a trace packet header.\n");
1997 return -EINVAL;
1998 } else {
1999 /*
2000 * Without trace packet header nor stream packet
2001 * context, a one-packet trace can indeed be empty. This
2002 * is only valid if there is only one stream class: 0.
2003 */
2004 ret = stream_assign_class(td, file_stream, 0);
2005 if (ret)
2006 return ret;
2007 return 0;
2008 }
2009 }
2010
2011 for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
2012 ret = create_stream_one_packet_index(pos, td, file_stream,
2013 filestats.st_size);
2014 if (ret)
2015 return ret;
2016 }
2017 return 0;
2018 }
2019
2020 static
2021 int create_trace_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
2022 {
2023 int ret;
2024
2025 if (td->packet_header_decl) {
2026 struct bt_definition *definition =
2027 td->packet_header_decl->p.definition_new(&td->packet_header_decl->p,
2028 stream->parent_def_scope, 0, 0, "trace.packet.header");
2029 if (!definition) {
2030 ret = -EINVAL;
2031 goto error;
2032 }
2033 stream->trace_packet_header =
2034 container_of(definition, struct definition_struct, p);
2035 stream->parent_def_scope = stream->trace_packet_header->p.scope;
2036 }
2037
2038 return 0;
2039
2040 error:
2041 fprintf(stderr, "[error] Unable to create trace definitions: %s\n", strerror(-ret));
2042 return ret;
2043 }
2044
2045 static
2046 int import_stream_packet_index(struct ctf_trace *td,
2047 struct ctf_file_stream *file_stream)
2048 {
2049 struct ctf_stream_pos *pos;
2050 struct ctf_packet_index *ctf_index = NULL;
2051 struct ctf_packet_index_file_hdr index_hdr;
2052 struct packet_index index;
2053 uint32_t packet_index_len, index_minor;
2054 int ret = 0;
2055 int first_packet = 1;
2056 size_t len;
2057
2058 pos = &file_stream->pos;
2059
2060 len = fread(&index_hdr, sizeof(index_hdr), 1, pos->index_fp);
2061 if (len != 1) {
2062 perror("read index file header");
2063 goto error;
2064 }
2065
2066 /* Check the index header */
2067 if (be32toh(index_hdr.magic) != CTF_INDEX_MAGIC) {
2068 fprintf(stderr, "[error] wrong index magic\n");
2069 ret = -1;
2070 goto error;
2071 }
2072 if (be32toh(index_hdr.index_major) != CTF_INDEX_MAJOR) {
2073 fprintf(stderr, "[error] Incompatible index file %" PRIu32
2074 ".%" PRIu32 ", supported %d.%d\n",
2075 be32toh(index_hdr.index_major),
2076 be32toh(index_hdr.index_minor), CTF_INDEX_MAJOR,
2077 CTF_INDEX_MINOR);
2078 ret = -1;
2079 goto error;
2080 }
2081 index_minor = be32toh(index_hdr.index_minor);
2082
2083 packet_index_len = be32toh(index_hdr.packet_index_len);
2084 if (packet_index_len == 0) {
2085 fprintf(stderr, "[error] Packet index length cannot be 0.\n");
2086 ret = -1;
2087 goto error;
2088 }
2089 /*
2090 * Allocate the index length found in header, not internal
2091 * representation.
2092 */
2093 ctf_index = g_malloc0(packet_index_len);
2094 while (fread(ctf_index, packet_index_len, 1,
2095 pos->index_fp) == 1) {
2096 uint64_t stream_id;
2097 struct ctf_stream_declaration *stream = NULL;
2098
2099 memset(&index, 0, sizeof(index));
2100 index.offset = be64toh(ctf_index->offset);
2101 index.packet_size = be64toh(ctf_index->packet_size);
2102 index.content_size = be64toh(ctf_index->content_size);
2103 index.ts_cycles.timestamp_begin = be64toh(ctf_index->timestamp_begin);
2104 index.ts_cycles.timestamp_end = be64toh(ctf_index->timestamp_end);
2105 index.events_discarded = be64toh(ctf_index->events_discarded);
2106 index.events_discarded_len = 64;
2107 index.data_offset = -1;
2108 stream_id = be64toh(ctf_index->stream_id);
2109 if (index_minor >= 1) {
2110 index.stream_instance_id = be64toh(ctf_index->stream_instance_id);
2111 index.packet_seq_num = be64toh(ctf_index->packet_seq_num);
2112 }
2113
2114 if (!first_packet) {
2115 /* add index to packet array */
2116 g_array_append_val(file_stream->pos.packet_index, index);
2117 continue;
2118 }
2119
2120 file_stream->parent.stream_id = stream_id;
2121 if (stream_id < td->streams->len) {
2122 stream = g_ptr_array_index(td->streams, stream_id);
2123 }
2124 if (!stream) {
2125 fprintf(stderr, "[error] Stream %" PRIu64
2126 " is not declared in metadata.\n",
2127 stream_id);
2128 ret = -EINVAL;
2129 goto error;
2130 }
2131 file_stream->parent.stream_class = stream;
2132 ret = create_stream_definitions(td, &file_stream->parent);
2133 if (ret)
2134 goto error;
2135 first_packet = 0;
2136 /* add index to packet array */
2137 g_array_append_val(file_stream->pos.packet_index, index);
2138 }
2139
2140 /* Index containing only the header. */
2141 if (!file_stream->parent.stream_class) {
2142 ret = -1;
2143 goto error;
2144 }
2145
2146 ret = 0;
2147
2148 error:
2149 g_free(ctf_index);
2150 return ret;
2151 }
2152
2153 /*
2154 * Note: many file streams can inherit from the same stream class
2155 * description (metadata).
2156 */
2157 static
2158 int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
2159 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2160 int whence))
2161 {
2162 int ret, fd, closeret;
2163 struct ctf_file_stream *file_stream;
2164 struct stat statbuf;
2165 char *index_name;
2166
2167 fd = openat(td->dirfd, path, flags);
2168 if (fd < 0) {
2169 perror("File stream openat()");
2170 ret = fd;
2171 goto error;
2172 }
2173
2174 /* Don't try to mmap subdirectories. Skip them, return success. */
2175 ret = fstat(fd, &statbuf);
2176 if (ret) {
2177 perror("File stream fstat()");
2178 goto fstat_error;
2179 }
2180 if (S_ISDIR(statbuf.st_mode)) {
2181 if (strncmp(path, "index", 5) != 0) {
2182 fprintf(stderr, "[warning] Skipping directory '%s' "
2183 "found in trace\n", path);
2184 }
2185 ret = 0;
2186 goto fd_is_dir_ok;
2187 }
2188 if (!statbuf.st_size) {
2189 /** Skip empty files. */
2190 ret = 0;
2191 goto fd_is_empty_file;
2192 }
2193
2194 file_stream = g_new0(struct ctf_file_stream, 1);
2195 file_stream->pos.last_offset = LAST_OFFSET_POISON;
2196 file_stream->pos.fd = -1;
2197 file_stream->pos.index_fp = NULL;
2198
2199 strncpy(file_stream->parent.path, path, PATH_MAX);
2200 file_stream->parent.path[PATH_MAX - 1] = '\0';
2201
2202 if (packet_seek) {
2203 file_stream->pos.packet_seek = packet_seek;
2204 } else {
2205 fprintf(stderr, "[error] packet_seek function undefined.\n");
2206 ret = -1;
2207 goto error_def;
2208 }
2209
2210 ret = ctf_init_pos(&file_stream->pos, &td->parent, fd, flags);
2211 if (ret)
2212 goto error_def;
2213 ret = create_trace_definitions(td, &file_stream->parent);
2214 if (ret)
2215 goto error_def;
2216 /*
2217 * For now, only a single clock per trace is supported.
2218 */
2219 file_stream->parent.current_clock = td->parent.single_clock;
2220
2221 /*
2222 * Allocate the index name for this stream and try to open it.
2223 */
2224 index_name = malloc((strlen(path) + sizeof(INDEX_PATH)) * sizeof(char));
2225 if (!index_name) {
2226 fprintf(stderr, "[error] Cannot allocate index filename\n");
2227 ret = -ENOMEM;
2228 goto error_def;
2229 }
2230 snprintf(index_name, strlen(path) + sizeof(INDEX_PATH),
2231 INDEX_PATH, path);
2232
2233 if (bt_faccessat(td->dirfd, td->parent.path, index_name, O_RDONLY, 0) < 0) {
2234 ret = create_stream_packet_index(td, file_stream);
2235 if (ret) {
2236 fprintf(stderr, "[error] Stream index creation error.\n");
2237 goto error_index;
2238 }
2239 } else {
2240 ret = openat(td->dirfd, index_name, flags);
2241 if (ret < 0) {
2242 perror("Index file openat()");
2243 ret = -1;
2244 goto error_free;
2245 }
2246 file_stream->pos.index_fp = fdopen(ret, "r");
2247 if (!file_stream->pos.index_fp) {
2248 perror("fdopen() error");
2249 goto error_free;
2250 }
2251 ret = import_stream_packet_index(td, file_stream);
2252 if (ret) {
2253 ret = -1;
2254 goto error_index;
2255 }
2256 ret = fclose(file_stream->pos.index_fp);
2257 if (ret < 0) {
2258 perror("close index");
2259 goto error_free;
2260 }
2261 }
2262 free(index_name);
2263
2264 /* Add stream file to stream class */
2265 g_ptr_array_add(file_stream->parent.stream_class->streams,
2266 &file_stream->parent);
2267 return 0;
2268
2269 error_index:
2270 if (file_stream->pos.index_fp) {
2271 ret = fclose(file_stream->pos.index_fp);
2272 if (ret < 0) {
2273 perror("close index");
2274 }
2275 }
2276 if (file_stream->parent.trace_packet_header)
2277 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
2278 error_free:
2279 free(index_name);
2280 error_def:
2281 closeret = ctf_fini_pos(&file_stream->pos);
2282 if (closeret) {
2283 fprintf(stderr, "Error on ctf_fini_pos\n");
2284 }
2285 g_free(file_stream);
2286 fd_is_empty_file:
2287 fd_is_dir_ok:
2288 fstat_error:
2289 closeret = close(fd);
2290 if (closeret) {
2291 perror("Error on fd close");
2292 }
2293 error:
2294 return ret;
2295 }
2296
2297 static
2298 int ctf_open_trace_read(struct ctf_trace *td,
2299 const char *path, int flags,
2300 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2301 int whence), FILE *metadata_fp)
2302 {
2303 struct ctf_scanner *scanner;
2304 int ret, closeret;
2305 struct dirent *dirent;
2306 struct dirent *diriter;
2307 size_t dirent_len;
2308 char *ext;
2309
2310 td->flags = flags;
2311
2312 /* Open trace directory */
2313 td->dir = opendir(path);
2314 if (!td->dir) {
2315 fprintf(stderr, "[error] Unable to open trace directory \"%s\".\n", path);
2316 ret = -ENOENT;
2317 goto error;
2318 }
2319
2320 td->dirfd = open(path, 0);
2321 if (td->dirfd < 0) {
2322 fprintf(stderr, "[error] Unable to open trace directory file descriptor for path \"%s\".\n", path);
2323 perror("Trace directory open");
2324 ret = -errno;
2325 goto error_dirfd;
2326 }
2327 strncpy(td->parent.path, path, sizeof(td->parent.path));
2328 td->parent.path[sizeof(td->parent.path) - 1] = '\0';
2329
2330 /*
2331 * Keep the metadata file separate.
2332 * Keep scanner object local to the open. We don't support
2333 * incremental metadata append for on-disk traces.
2334 */
2335 scanner = ctf_scanner_alloc();
2336 if (!scanner) {
2337 fprintf(stderr, "[error] Error allocating scanner\n");
2338 ret = -ENOMEM;
2339 goto error_metadata;
2340 }
2341 ret = ctf_trace_metadata_read(td, metadata_fp, scanner, 0);
2342 ctf_scanner_free(scanner);
2343 if (ret) {
2344 if (ret == -ENOENT) {
2345 fprintf(stderr, "[warning] Empty metadata.\n");
2346 }
2347 fprintf(stderr, "[warning] Unable to open trace metadata for path \"%s\".\n", path);
2348 goto error_metadata;
2349 }
2350
2351 /*
2352 * Open each stream: for each file, try to open, check magic
2353 * number, and get the stream ID to add to the right location in
2354 * the stream array.
2355 */
2356
2357 dirent_len = offsetof(struct dirent, d_name) +
2358 fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
2359
2360 dirent = malloc(dirent_len);
2361
2362 for (;;) {
2363 ret = readdir_r(td->dir, dirent, &diriter);
2364 if (ret) {
2365 fprintf(stderr, "[error] Readdir error.\n");
2366 goto readdir_error;
2367 }
2368 if (!diriter)
2369 break;
2370 /* Ignore hidden files, ., .. and metadata. */
2371 if (!strncmp(diriter->d_name, ".", 1)
2372 || !strcmp(diriter->d_name, "..")
2373 || !strcmp(diriter->d_name, "metadata"))
2374 continue;
2375
2376 /* Ignore index files : *.idx */
2377 ext = strrchr(diriter->d_name, '.');
2378 if (ext && (!strcmp(ext, ".idx"))) {
2379 continue;
2380 }
2381
2382 ret = ctf_open_file_stream_read(td, diriter->d_name,
2383 flags, packet_seek);
2384 if (ret) {
2385 fprintf(stderr, "[error] Open file stream error.\n");
2386 goto readdir_error;
2387 }
2388 }
2389
2390 free(dirent);
2391 return 0;
2392
2393 readdir_error:
2394 free(dirent);
2395 error_metadata:
2396 closeret = close(td->dirfd);
2397 if (closeret) {
2398 perror("Error on fd close");
2399 }
2400 error_dirfd:
2401 closeret = closedir(td->dir);
2402 if (closeret) {
2403 perror("Error on closedir");
2404 }
2405 error:
2406 return ret;
2407 }
2408
2409 /*
2410 * ctf_open_trace: Open a CTF trace and index it.
2411 * Note that the user must seek the trace after the open (using the iterator)
2412 * since the index creation read it entirely.
2413 */
2414 static
2415 struct bt_trace_descriptor *ctf_open_trace(const char *path, int flags,
2416 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2417 int whence), FILE *metadata_fp)
2418 {
2419 struct ctf_trace *td;
2420 int ret;
2421
2422 /*
2423 * If packet_seek is NULL, we provide our default version.
2424 */
2425 if (!packet_seek)
2426 packet_seek = ctf_packet_seek;
2427
2428 td = g_new0(struct ctf_trace, 1);
2429 if (!td) {
2430 goto error;
2431 }
2432 init_trace_descriptor(&td->parent);
2433
2434 switch (flags & O_ACCMODE) {
2435 case O_RDONLY:
2436 if (!path) {
2437 fprintf(stderr, "[error] Path missing for input CTF trace.\n");
2438 goto error;
2439 }
2440 ret = ctf_open_trace_read(td, path, flags, packet_seek, metadata_fp);
2441 if (ret)
2442 goto error;
2443 break;
2444 case O_RDWR:
2445 fprintf(stderr, "[error] Opening CTF traces for output is not supported yet.\n");
2446 goto error;
2447 default:
2448 fprintf(stderr, "[error] Incorrect open flags.\n");
2449 goto error;
2450 }
2451
2452 ret = trace_debug_info_create(td);
2453 if (ret) {
2454 goto error;
2455 }
2456
2457 return &td->parent;
2458 error:
2459 if (td) {
2460 trace_debug_info_destroy(td);
2461 g_free(td);
2462 }
2463 return NULL;
2464 }
2465
2466 static
2467 void ctf_init_mmap_pos(struct ctf_stream_pos *pos,
2468 struct bt_mmap_stream *mmap_info)
2469 {
2470 pos->mmap_offset = 0;
2471 pos->packet_size = 0;
2472 pos->content_size = 0;
2473 pos->content_size_loc = NULL;
2474 pos->fd = mmap_info->fd;
2475 pos->base_mma = NULL;
2476 pos->offset = 0;
2477 pos->dummy = false;
2478 pos->cur_index = 0;
2479 pos->prot = PROT_READ;
2480 pos->flags = MAP_PRIVATE;
2481 pos->parent.rw_table = read_dispatch_table;
2482 pos->parent.event_cb = ctf_read_event;
2483 pos->priv = mmap_info->priv;
2484 pos->packet_index = g_array_new(FALSE, TRUE,
2485 sizeof(struct packet_index));
2486 }
2487
2488 static
2489 int prepare_mmap_stream_definition(struct ctf_trace *td,
2490 struct ctf_file_stream *file_stream,
2491 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2492 int whence))
2493 {
2494 struct ctf_stream_declaration *stream;
2495 uint64_t stream_id;
2496 int ret;
2497
2498 /* Ask for the first packet to get the stream_id. */
2499 packet_seek(&file_stream->pos.parent, 0, SEEK_SET);
2500 ret = bt_packet_seek_get_error();
2501 if (ret) {
2502 goto end;
2503 }
2504 stream_id = file_stream->parent.stream_id;
2505 if (stream_id >= td->streams->len) {
2506 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
2507 "in metadata.\n", stream_id);
2508 ret = -EINVAL;
2509 goto end;
2510 }
2511 stream = g_ptr_array_index(td->streams, stream_id);
2512 if (!stream) {
2513 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
2514 "in metadata.\n", stream_id);
2515 ret = -EINVAL;
2516 goto end;
2517 }
2518 file_stream->parent.stream_class = stream;
2519 ret = create_stream_definitions(td, &file_stream->parent);
2520 end:
2521 return ret;
2522 }
2523
2524 static
2525 int ctf_open_mmap_stream_read(struct ctf_trace *td,
2526 struct bt_mmap_stream *mmap_info,
2527 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2528 int whence))
2529 {
2530 int ret;
2531 struct ctf_file_stream *file_stream;
2532
2533 file_stream = g_new0(struct ctf_file_stream, 1);
2534 file_stream->parent.stream_id = -1ULL;
2535 file_stream->pos.last_offset = LAST_OFFSET_POISON;
2536 ctf_init_mmap_pos(&file_stream->pos, mmap_info);
2537
2538 file_stream->pos.packet_seek = packet_seek;
2539
2540 ret = create_trace_definitions(td, &file_stream->parent);
2541 if (ret) {
2542 goto error_def;
2543 }
2544
2545 ret = prepare_mmap_stream_definition(td, file_stream, packet_seek);
2546 if (ret)
2547 goto error_index;
2548
2549 /*
2550 * For now, only a single clock per trace is supported.
2551 */
2552 file_stream->parent.current_clock = td->parent.single_clock;
2553
2554 /* Add stream file to stream class */
2555 g_ptr_array_add(file_stream->parent.stream_class->streams,
2556 &file_stream->parent);
2557 return 0;
2558
2559 error_index:
2560 if (file_stream->parent.trace_packet_header)
2561 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
2562 error_def:
2563 g_free(file_stream);
2564 return ret;
2565 }
2566
2567 static
2568 int ctf_open_mmap_trace_read(struct ctf_trace *td,
2569 struct bt_mmap_stream_list *mmap_list,
2570 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2571 int whence),
2572 FILE *metadata_fp)
2573 {
2574 int ret;
2575 struct bt_mmap_stream *mmap_info;
2576
2577 td->scanner = ctf_scanner_alloc();
2578 if (!td->scanner) {
2579 fprintf(stderr, "[error] Error allocating scanner\n");
2580 ret = -ENOMEM;
2581 goto error;
2582 }
2583 ret = ctf_trace_metadata_read(td, metadata_fp, td->scanner, 0);
2584 if (ret) {
2585 if (ret == -ENOENT) {
2586 fprintf(stderr, "[warning] Empty metadata.\n");
2587 }
2588 goto error;
2589 }
2590
2591 /*
2592 * for each stream, try to open, check magic number, and get the
2593 * stream ID to add to the right location in the stream array.
2594 */
2595 bt_list_for_each_entry(mmap_info, &mmap_list->head, list) {
2596 ret = ctf_open_mmap_stream_read(td, mmap_info, packet_seek);
2597 if (ret) {
2598 fprintf(stderr, "[error] Open file mmap stream error.\n");
2599 goto error;
2600 }
2601 }
2602 return 0;
2603
2604 error:
2605 ctf_scanner_free(td->scanner);
2606 return ret;
2607 }
2608
2609 static
2610 struct bt_trace_descriptor *ctf_open_mmap_trace(
2611 struct bt_mmap_stream_list *mmap_list,
2612 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2613 int whence),
2614 FILE *metadata_fp)
2615 {
2616 struct ctf_trace *td;
2617 int ret;
2618
2619 if (!metadata_fp) {
2620 fprintf(stderr, "[error] No metadata file pointer associated, "
2621 "required for mmap parsing\n");
2622 goto error;
2623 }
2624 if (!packet_seek) {
2625 fprintf(stderr, "[error] packet_seek function undefined.\n");
2626 goto error;
2627 }
2628 td = g_new0(struct ctf_trace, 1);
2629 td->dirfd = -1;
2630 ret = ctf_open_mmap_trace_read(td, mmap_list, packet_seek, metadata_fp);
2631 if (ret)
2632 goto error_free;
2633
2634 ret = trace_debug_info_create(td);
2635 if (ret) {
2636 goto error_free;
2637 }
2638
2639 return &td->parent;
2640
2641 error_free:
2642 g_free(td);
2643 error:
2644 return NULL;
2645 }
2646
2647 int ctf_append_trace_metadata(struct bt_trace_descriptor *tdp,
2648 FILE *metadata_fp)
2649 {
2650 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2651 int i, j;
2652 int ret;
2653
2654 if (!td->scanner)
2655 return -EINVAL;
2656 ret = ctf_trace_metadata_read(td, metadata_fp, td->scanner, 1);
2657 if (ret)
2658 return ret;
2659 /* for each stream_class */
2660 for (i = 0; i < td->streams->len; i++) {
2661 struct ctf_stream_declaration *stream_class;
2662
2663 stream_class = g_ptr_array_index(td->streams, i);
2664 if (!stream_class)
2665 continue;
2666 /* for each stream */
2667 for (j = 0; j < stream_class->streams->len; j++) {
2668 struct ctf_stream_definition *stream;
2669
2670 stream = g_ptr_array_index(stream_class->streams, j);
2671 if (!stream)
2672 continue;
2673 ret = copy_event_declarations_stream_class_to_stream(td,
2674 stream_class, stream);
2675 if (ret)
2676 return ret;
2677 }
2678 }
2679 return 0;
2680 }
2681
2682 static
2683 int ctf_convert_index_timestamp(struct bt_trace_descriptor *tdp)
2684 {
2685 int i, j, k;
2686 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2687
2688 /* for each stream_class */
2689 for (i = 0; i < td->streams->len; i++) {
2690 struct ctf_stream_declaration *stream_class;
2691
2692 stream_class = g_ptr_array_index(td->streams, i);
2693 if (!stream_class)
2694 continue;
2695 /* for each file_stream */
2696 for (j = 0; j < stream_class->streams->len; j++) {
2697 struct ctf_stream_definition *stream;
2698 struct ctf_stream_pos *stream_pos;
2699 struct ctf_file_stream *cfs;
2700
2701 stream = g_ptr_array_index(stream_class->streams, j);
2702 if (!stream)
2703 continue;
2704 cfs = container_of(stream, struct ctf_file_stream,
2705 parent);
2706 stream_pos = &cfs->pos;
2707 if (!stream_pos->packet_index)
2708 continue;
2709
2710 for (k = 0; k < stream_pos->packet_index->len; k++) {
2711 struct packet_index *index;
2712
2713 index = &g_array_index(stream_pos->packet_index,
2714 struct packet_index, k);
2715 index->ts_real.timestamp_begin =
2716 ctf_get_real_timestamp(stream,
2717 index->ts_cycles.timestamp_begin);
2718 index->ts_real.timestamp_end =
2719 ctf_get_real_timestamp(stream,
2720 index->ts_cycles.timestamp_end);
2721 }
2722 }
2723 }
2724 return 0;
2725 }
2726
2727 static
2728 int ctf_close_file_stream(struct ctf_file_stream *file_stream)
2729 {
2730 int ret;
2731
2732 ret = ctf_fini_pos(&file_stream->pos);
2733 if (ret) {
2734 fprintf(stderr, "Error on ctf_fini_pos\n");
2735 return -1;
2736 }
2737 if (file_stream->pos.fd >= 0) {
2738 ret = close(file_stream->pos.fd);
2739 if (ret) {
2740 perror("Error closing file fd");
2741 return -1;
2742 }
2743 }
2744 return 0;
2745 }
2746
2747 static
2748 int ctf_close_trace(struct bt_trace_descriptor *tdp)
2749 {
2750 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2751 int ret;
2752
2753 if (td->streams) {
2754 int i;
2755
2756 for (i = 0; i < td->streams->len; i++) {
2757 struct ctf_stream_declaration *stream;
2758 int j;
2759
2760 stream = g_ptr_array_index(td->streams, i);
2761 if (!stream)
2762 continue;
2763 for (j = 0; j < stream->streams->len; j++) {
2764 struct ctf_file_stream *file_stream;
2765 file_stream = container_of(g_ptr_array_index(stream->streams, j),
2766 struct ctf_file_stream, parent);
2767 ret = ctf_close_file_stream(file_stream);
2768 if (ret)
2769 return ret;
2770 }
2771 }
2772 }
2773 ctf_destroy_metadata(td);
2774 ctf_scanner_free(td->scanner);
2775 if (td->dirfd >= 0) {
2776 ret = close(td->dirfd);
2777 if (ret) {
2778 perror("Error closing dirfd");
2779 return ret;
2780 }
2781 }
2782 if (td->dir) {
2783 ret = closedir(td->dir);
2784 if (ret) {
2785 perror("Error closedir");
2786 return ret;
2787 }
2788 }
2789 free(td->metadata_string);
2790 trace_debug_info_destroy(td);
2791 g_free(td);
2792 return 0;
2793 }
2794
2795 static
2796 void ctf_set_context(struct bt_trace_descriptor *descriptor,
2797 struct bt_context *ctx)
2798 {
2799 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2800 parent);
2801
2802 td->parent.ctx = ctx;
2803 }
2804
2805 static
2806 void ctf_set_handle(struct bt_trace_descriptor *descriptor,
2807 struct bt_trace_handle *handle)
2808 {
2809 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2810 parent);
2811
2812 td->parent.handle = handle;
2813 }
2814
2815 static
2816 void __attribute__((constructor)) ctf_init(void)
2817 {
2818 int ret;
2819
2820 ctf_format.name = g_quark_from_static_string("ctf");
2821 ret = bt_register_format(&ctf_format);
2822 assert(!ret);
2823 }
2824
2825 static
2826 void __attribute__((destructor)) ctf_exit(void)
2827 {
2828 bt_unregister_format(&ctf_format);
2829 }
BabelTrace - Trace Format Babel Tower
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