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Fix: report truncated files while reading
[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
1184 if (packet_index->packet_size > ((uint64_t) pos->file_length - packet_index->offset) * CHAR_BIT) {
1185 fprintf(stderr, "[error] Packet size (%" PRIu64 " bits) is larger than remaining file size (%" PRIu64 " bits).\n",
1186 packet_index->packet_size, ((uint64_t) pos->file_length - packet_index->offset) * CHAR_BIT);
1187 ret = -1;
1188 goto end;
1189 }
1190
1191 pos->content_size = packet_index->content_size;
1192 pos->packet_size = packet_index->packet_size;
1193 pos->mmap_offset = packet_index->offset;
1194 pos->data_offset = packet_index->data_offset;
1195 if (pos->data_offset < packet_index->content_size) {
1196 pos->offset = 0; /* will read headers */
1197 } else if (pos->data_offset == packet_index->content_size) {
1198 /* empty packet */
1199 pos->offset = packet_index->data_offset;
1200 whence = SEEK_CUR;
1201 goto read_next_packet;
1202 } else {
1203 pos->offset = EOF;
1204 ret = 0;
1205 goto end;
1206 }
1207 }
1208 /* map new base. Need mapping length from header. */
1209 pos->base_mma = mmap_align(pos->packet_size / CHAR_BIT, pos->prot,
1210 pos->flags, pos->fd, pos->mmap_offset);
1211 if (pos->base_mma == MAP_FAILED) {
1212 fprintf(stderr, "[error] mmap error %s.\n",
1213 strerror(errno));
1214 assert(0);
1215 }
1216
1217 /* update trace_packet_header and stream_packet_context */
1218 if (!(pos->prot & PROT_WRITE) &&
1219 file_stream->parent.trace_packet_header) {
1220 /* Read packet header */
1221 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1222 assert(!ret);
1223 }
1224 if (!(pos->prot & PROT_WRITE) &&
1225 file_stream->parent.stream_packet_context) {
1226 /* Read packet context */
1227 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1228 assert(!ret);
1229 }
1230 ret = 0;
1231 end:
1232 bt_packet_seek_set_error(ret);
1233 }
1234
1235 static
1236 int packet_metadata(struct ctf_trace *td, FILE *fp)
1237 {
1238 uint32_t magic;
1239 size_t len;
1240 int ret = 0;
1241
1242 len = fread(&magic, sizeof(magic), 1, fp);
1243 if (len != 1) {
1244 goto end;
1245 }
1246 if (magic == TSDL_MAGIC) {
1247 ret = 1;
1248 td->byte_order = BYTE_ORDER;
1249 CTF_TRACE_SET_FIELD(td, byte_order);
1250 } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) {
1251 ret = 1;
1252 td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ?
1253 LITTLE_ENDIAN : BIG_ENDIAN;
1254 CTF_TRACE_SET_FIELD(td, byte_order);
1255 }
1256 end:
1257 rewind(fp);
1258 return ret;
1259 }
1260
1261 /*
1262 * Returns 0 on success, -1 on error.
1263 */
1264 static
1265 int check_version(unsigned int major, unsigned int minor)
1266 {
1267 switch (major) {
1268 case 1:
1269 switch (minor) {
1270 case 8:
1271 return 0;
1272 default:
1273 goto warning;
1274 }
1275 default:
1276 goto warning;
1277
1278 }
1279
1280 /* eventually return an error instead of warning */
1281 warning:
1282 fprintf(stderr, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n",
1283 major, minor);
1284 return 0;
1285 }
1286
1287 static
1288 int ctf_trace_metadata_packet_read(struct ctf_trace *td, FILE *in,
1289 FILE *out)
1290 {
1291 struct metadata_packet_header header;
1292 size_t readlen, writelen, toread;
1293 char buf[4096 + 1]; /* + 1 for debug-mode \0 */
1294 int ret = 0;
1295
1296 readlen = fread(&header, header_sizeof(header), 1, in);
1297 if (readlen < 1)
1298 return -EINVAL;
1299
1300 if (td->byte_order != BYTE_ORDER) {
1301 header.magic = GUINT32_SWAP_LE_BE(header.magic);
1302 header.checksum = GUINT32_SWAP_LE_BE(header.checksum);
1303 header.content_size = GUINT32_SWAP_LE_BE(header.content_size);
1304 header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size);
1305 }
1306 if (header.checksum)
1307 fprintf(stderr, "[warning] checksum verification not supported yet.\n");
1308 if (header.compression_scheme) {
1309 fprintf(stderr, "[error] compression (%u) not supported yet.\n",
1310 header.compression_scheme);
1311 return -EINVAL;
1312 }
1313 if (header.encryption_scheme) {
1314 fprintf(stderr, "[error] encryption (%u) not supported yet.\n",
1315 header.encryption_scheme);
1316 return -EINVAL;
1317 }
1318 if (header.checksum_scheme) {
1319 fprintf(stderr, "[error] checksum (%u) not supported yet.\n",
1320 header.checksum_scheme);
1321 return -EINVAL;
1322 }
1323 if (check_version(header.major, header.minor) < 0)
1324 return -EINVAL;
1325 if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) {
1326 memcpy(td->uuid, header.uuid, sizeof(header.uuid));
1327 CTF_TRACE_SET_FIELD(td, uuid);
1328 } else {
1329 if (bt_uuid_compare(header.uuid, td->uuid))
1330 return -EINVAL;
1331 }
1332
1333 if ((header.content_size / CHAR_BIT) < header_sizeof(header))
1334 return -EINVAL;
1335
1336 toread = (header.content_size / CHAR_BIT) - header_sizeof(header);
1337
1338 for (;;) {
1339 readlen = fread(buf, sizeof(char), min(sizeof(buf) - 1, toread), in);
1340 if (ferror(in)) {
1341 ret = -EINVAL;
1342 break;
1343 }
1344 if (babeltrace_debug) {
1345 buf[readlen] = '\0';
1346 fprintf(stderr, "[debug] metadata packet read: %s\n",
1347 buf);
1348 }
1349
1350 writelen = fwrite(buf, sizeof(char), readlen, out);
1351 if (writelen < readlen) {
1352 ret = -EIO;
1353 break;
1354 }
1355 if (ferror(out)) {
1356 ret = -EINVAL;
1357 break;
1358 }
1359 toread -= readlen;
1360 if (!toread) {
1361 ret = 0; /* continue reading next packet */
1362 goto read_padding;
1363 }
1364 }
1365 return ret;
1366
1367 read_padding:
1368 toread = (header.packet_size - header.content_size) / CHAR_BIT;
1369 ret = fseek(in, toread, SEEK_CUR);
1370 if (ret < 0) {
1371 fprintf(stderr, "[warning] Missing padding at end of file\n");
1372 ret = 0;
1373 }
1374 return ret;
1375 }
1376
1377 static
1378 int ctf_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
1379 char **buf)
1380 {
1381 FILE *in, *out;
1382 size_t size, buflen;
1383 int ret;
1384
1385 in = *fp;
1386 /*
1387 * Using strlen on *buf instead of size of open_memstream
1388 * because its size includes garbage at the end (after final
1389 * \0). This is the allocated size, not the actual string size.
1390 */
1391 out = babeltrace_open_memstream(buf, &size);
1392 if (out == NULL) {
1393 perror("Metadata open_memstream");
1394 return -errno;
1395 }
1396 for (;;) {
1397 ret = ctf_trace_metadata_packet_read(td, in, out);
1398 if (ret) {
1399 break;
1400 }
1401 if (feof(in)) {
1402 ret = 0;
1403 break;
1404 }
1405 }
1406 /* close to flush the buffer */
1407 ret = babeltrace_close_memstream(buf, &size, out);
1408 if (ret < 0) {
1409 int closeret;
1410
1411 perror("babeltrace_flush_memstream");
1412 ret = -errno;
1413 closeret = fclose(in);
1414 if (closeret) {
1415 perror("Error in fclose");
1416 }
1417 return ret;
1418 }
1419 ret = fclose(in);
1420 if (ret) {
1421 perror("Error in fclose");
1422 }
1423 /* open for reading */
1424 buflen = strlen(*buf);
1425 if (!buflen) {
1426 *fp = NULL;
1427 return -ENOENT;
1428 }
1429 *fp = babeltrace_fmemopen(*buf, buflen, "rb");
1430 if (!*fp) {
1431 perror("Metadata fmemopen");
1432 return -errno;
1433 }
1434 return 0;
1435 }
1436
1437 static
1438 int ctf_trace_metadata_read(struct ctf_trace *td, FILE *metadata_fp,
1439 struct ctf_scanner *scanner, int append)
1440 {
1441 struct ctf_file_stream *metadata_stream;
1442 FILE *fp;
1443 char *buf = NULL;
1444 int ret = 0, closeret;
1445
1446 metadata_stream = g_new0(struct ctf_file_stream, 1);
1447 metadata_stream->pos.last_offset = LAST_OFFSET_POISON;
1448
1449 if (metadata_fp) {
1450 fp = metadata_fp;
1451 metadata_stream->pos.fd = -1;
1452 } else {
1453 td->metadata = &metadata_stream->parent;
1454 metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
1455 if (metadata_stream->pos.fd < 0) {
1456 fprintf(stderr, "Unable to open metadata.\n");
1457 ret = -1;
1458 goto end_free;
1459 }
1460
1461 fp = fdopen(metadata_stream->pos.fd, "r");
1462 if (!fp) {
1463 fprintf(stderr, "[error] Unable to open metadata stream.\n");
1464 perror("Metadata stream open");
1465 ret = -errno;
1466 goto end_stream;
1467 }
1468 /* fd now belongs to fp */
1469 metadata_stream->pos.fd = -1;
1470 }
1471 if (babeltrace_debug)
1472 yydebug = 1;
1473
1474 if (packet_metadata(td, fp)) {
1475 ret = ctf_trace_metadata_stream_read(td, &fp, &buf);
1476 if (ret) {
1477 goto end;
1478 }
1479 td->metadata_string = buf;
1480 td->metadata_packetized = 1;
1481 } else {
1482 if (!append) {
1483 unsigned int major, minor;
1484 ssize_t nr_items;
1485
1486 td->byte_order = BYTE_ORDER;
1487
1488 /* Check text-only metadata header and version */
1489 nr_items = fscanf(fp, "/* CTF %10u.%10u", &major, &minor);
1490 if (nr_items < 2)
1491 fprintf(stderr, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
1492 if (check_version(major, minor) < 0) {
1493 ret = -EINVAL;
1494 goto end;
1495 }
1496 rewind(fp);
1497 }
1498 }
1499
1500 ret = ctf_scanner_append_ast(scanner, fp);
1501 if (ret) {
1502 fprintf(stderr, "[error] Error creating AST\n");
1503 goto end;
1504 }
1505
1506 if (babeltrace_debug) {
1507 ret = ctf_visitor_print_xml(stderr, 0, &scanner->ast->root);
1508 if (ret) {
1509 fprintf(stderr, "[error] Error visiting AST for XML output\n");
1510 goto end;
1511 }
1512 }
1513
1514 ret = ctf_visitor_semantic_check(stderr, 0, &scanner->ast->root);
1515 if (ret) {
1516 fprintf(stderr, "[error] Error in CTF semantic validation %d\n", ret);
1517 goto end;
1518 }
1519 ret = ctf_visitor_construct_metadata(stderr, 0, &scanner->ast->root,
1520 td, td->byte_order);
1521 if (ret) {
1522 fprintf(stderr, "[error] Error in CTF metadata constructor %d\n", ret);
1523 goto end;
1524 }
1525 end:
1526 if (fp) {
1527 closeret = fclose(fp);
1528 if (closeret) {
1529 perror("Error on fclose");
1530 }
1531 }
1532 end_stream:
1533 if (metadata_stream->pos.fd >= 0) {
1534 closeret = close(metadata_stream->pos.fd);
1535 if (closeret) {
1536 perror("Error on metadata stream fd close");
1537 }
1538 }
1539 end_free:
1540 if (ret)
1541 g_free(metadata_stream);
1542 return ret;
1543 }
1544
1545 static
1546 struct ctf_event_definition *create_event_definitions(struct ctf_trace *td,
1547 struct ctf_stream_definition *stream,
1548 struct ctf_event_declaration *event)
1549 {
1550 struct ctf_event_definition *stream_event = g_new0(struct ctf_event_definition, 1);
1551
1552 if (event->context_decl) {
1553 struct bt_definition *definition =
1554 event->context_decl->p.definition_new(&event->context_decl->p,
1555 stream->parent_def_scope, 0, 0, "event.context");
1556 if (!definition) {
1557 goto error;
1558 }
1559 stream_event->event_context = container_of(definition,
1560 struct definition_struct, p);
1561 stream->parent_def_scope = stream_event->event_context->p.scope;
1562 }
1563 if (event->fields_decl) {
1564 struct bt_definition *definition =
1565 event->fields_decl->p.definition_new(&event->fields_decl->p,
1566 stream->parent_def_scope, 0, 0, "event.fields");
1567 if (!definition) {
1568 goto error;
1569 }
1570 stream_event->event_fields = container_of(definition,
1571 struct definition_struct, p);
1572 stream->parent_def_scope = stream_event->event_fields->p.scope;
1573 }
1574 stream_event->stream = stream;
1575 return stream_event;
1576
1577 error:
1578 if (stream_event->event_fields)
1579 bt_definition_unref(&stream_event->event_fields->p);
1580 if (stream_event->event_context)
1581 bt_definition_unref(&stream_event->event_context->p);
1582 fprintf(stderr, "[error] Unable to create event definition for event \"%s\".\n",
1583 g_quark_to_string(event->name));
1584 return NULL;
1585 }
1586
1587 static
1588 int copy_event_declarations_stream_class_to_stream(struct ctf_trace *td,
1589 struct ctf_stream_declaration *stream_class,
1590 struct ctf_stream_definition *stream)
1591 {
1592 size_t def_size, class_size, i;
1593 int ret = 0;
1594
1595 def_size = stream->events_by_id->len;
1596 class_size = stream_class->events_by_id->len;
1597
1598 g_ptr_array_set_size(stream->events_by_id, class_size);
1599 for (i = def_size; i < class_size; i++) {
1600 struct ctf_event_declaration *event =
1601 g_ptr_array_index(stream_class->events_by_id, i);
1602 struct ctf_event_definition *stream_event;
1603
1604 if (!event)
1605 continue;
1606 stream_event = create_event_definitions(td, stream, event);
1607 if (!stream_event) {
1608 ret = -EINVAL;
1609 goto error;
1610 }
1611 g_ptr_array_index(stream->events_by_id, i) = stream_event;
1612 }
1613 error:
1614 return ret;
1615 }
1616
1617 static
1618 int create_stream_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1619 {
1620 struct ctf_stream_declaration *stream_class;
1621 int ret;
1622 int i;
1623
1624 if (stream->stream_definitions_created)
1625 return 0;
1626
1627 stream_class = stream->stream_class;
1628
1629 if (stream_class->packet_context_decl) {
1630 struct bt_definition *definition =
1631 stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p,
1632 stream->parent_def_scope, 0, 0, "stream.packet.context");
1633 if (!definition) {
1634 ret = -EINVAL;
1635 goto error;
1636 }
1637 stream->stream_packet_context = container_of(definition,
1638 struct definition_struct, p);
1639 stream->parent_def_scope = stream->stream_packet_context->p.scope;
1640 }
1641 if (stream_class->event_header_decl) {
1642 struct bt_definition *definition =
1643 stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p,
1644 stream->parent_def_scope, 0, 0, "stream.event.header");
1645 if (!definition) {
1646 ret = -EINVAL;
1647 goto error;
1648 }
1649 stream->stream_event_header =
1650 container_of(definition, struct definition_struct, p);
1651 stream->parent_def_scope = stream->stream_event_header->p.scope;
1652 }
1653 if (stream_class->event_context_decl) {
1654 struct bt_definition *definition =
1655 stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p,
1656 stream->parent_def_scope, 0, 0, "stream.event.context");
1657 if (!definition) {
1658 ret = -EINVAL;
1659 goto error;
1660 }
1661 stream->stream_event_context =
1662 container_of(definition, struct definition_struct, p);
1663 stream->parent_def_scope = stream->stream_event_context->p.scope;
1664 }
1665 stream->events_by_id = g_ptr_array_new();
1666 ret = copy_event_declarations_stream_class_to_stream(td,
1667 stream_class, stream);
1668 if (ret)
1669 goto error_event;
1670 return 0;
1671
1672 error_event:
1673 for (i = 0; i < stream->events_by_id->len; i++) {
1674 struct ctf_event_definition *stream_event = g_ptr_array_index(stream->events_by_id, i);
1675 if (stream_event)
1676 g_free(stream_event);
1677 }
1678 g_ptr_array_free(stream->events_by_id, TRUE);
1679 error:
1680 if (stream->stream_event_context)
1681 bt_definition_unref(&stream->stream_event_context->p);
1682 if (stream->stream_event_header)
1683 bt_definition_unref(&stream->stream_event_header->p);
1684 if (stream->stream_packet_context)
1685 bt_definition_unref(&stream->stream_packet_context->p);
1686 fprintf(stderr, "[error] Unable to create stream (%" PRIu64 ") definitions: %s\n",
1687 stream_class->stream_id, strerror(-ret));
1688 return ret;
1689 }
1690
1691 static
1692 int stream_assign_class(struct ctf_trace *td,
1693 struct ctf_file_stream *file_stream,
1694 uint64_t stream_id)
1695 {
1696 struct ctf_stream_declaration *stream;
1697 int ret;
1698
1699 file_stream->parent.stream_id = stream_id;
1700 if (stream_id >= td->streams->len) {
1701 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1702 return -EINVAL;
1703 }
1704 stream = g_ptr_array_index(td->streams, stream_id);
1705 if (!stream) {
1706 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1707 return -EINVAL;
1708 }
1709 file_stream->parent.stream_class = stream;
1710 ret = create_stream_definitions(td, &file_stream->parent);
1711 if (ret)
1712 return ret;
1713 return 0;
1714 }
1715
1716 static
1717 int create_stream_one_packet_index(struct ctf_stream_pos *pos,
1718 struct ctf_trace *td,
1719 struct ctf_file_stream *file_stream)
1720 {
1721 struct packet_index packet_index;
1722 uint64_t stream_id = 0;
1723 uint64_t packet_map_len = DEFAULT_HEADER_LEN, tmp_map_len;
1724 int first_packet = 0;
1725 int len_index;
1726 int ret;
1727
1728 begin:
1729 memset(&packet_index, 0, sizeof(packet_index));
1730 if (!pos->mmap_offset) {
1731 first_packet = 1;
1732 }
1733
1734 if (pos->file_length - pos->mmap_offset < (packet_map_len >> LOG2_CHAR_BIT)) {
1735 packet_map_len = (pos->file_length - pos->mmap_offset) << LOG2_CHAR_BIT;
1736 }
1737
1738 if (pos->base_mma) {
1739 /* unmap old base */
1740 ret = munmap_align(pos->base_mma);
1741 if (ret) {
1742 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1743 strerror(errno));
1744 return ret;
1745 }
1746 pos->base_mma = NULL;
1747 }
1748 /* map new base. Need mapping length from header. */
1749 pos->base_mma = mmap_align(packet_map_len >> LOG2_CHAR_BIT, PROT_READ,
1750 MAP_PRIVATE, pos->fd, pos->mmap_offset);
1751 assert(pos->base_mma != MAP_FAILED);
1752 /*
1753 * Use current mapping size as temporary content and packet
1754 * size.
1755 */
1756 pos->content_size = packet_map_len;
1757 pos->packet_size = packet_map_len;
1758 pos->offset = 0; /* Position of the packet header */
1759
1760 packet_index.offset = pos->mmap_offset;
1761
1762 /* read and check header, set stream id (and check) */
1763 if (file_stream->parent.trace_packet_header) {
1764 /* Read packet header */
1765 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1766 if (ret) {
1767 if (ret == -EFAULT)
1768 goto retry;
1769 fprintf(stderr, "[error] Unable to read packet header: %s\n", strerror(-ret));
1770 return ret;
1771 }
1772 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic"));
1773 if (len_index >= 0) {
1774 struct bt_definition *field;
1775 uint64_t magic;
1776
1777 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1778 magic = bt_get_unsigned_int(field);
1779 if (magic != CTF_MAGIC) {
1780 fprintf(stderr, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
1781 magic,
1782 file_stream->pos.packet_index->len,
1783 (ssize_t) pos->mmap_offset);
1784 return -EINVAL;
1785 }
1786 }
1787
1788 /* check uuid */
1789 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid"));
1790 if (len_index >= 0) {
1791 struct definition_array *defarray;
1792 struct bt_definition *field;
1793 uint64_t i;
1794 uint8_t uuidval[BABELTRACE_UUID_LEN];
1795
1796 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1797 assert(field->declaration->id == CTF_TYPE_ARRAY);
1798 defarray = container_of(field, struct definition_array, p);
1799 assert(bt_array_len(defarray) == BABELTRACE_UUID_LEN);
1800
1801 for (i = 0; i < BABELTRACE_UUID_LEN; i++) {
1802 struct bt_definition *elem;
1803
1804 elem = bt_array_index(defarray, i);
1805 uuidval[i] = bt_get_unsigned_int(elem);
1806 }
1807 ret = bt_uuid_compare(td->uuid, uuidval);
1808 if (ret) {
1809 fprintf(stderr, "[error] Unique Universal Identifiers do not match.\n");
1810 return -EINVAL;
1811 }
1812 }
1813
1814 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id"));
1815 if (len_index >= 0) {
1816 struct bt_definition *field;
1817
1818 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1819 stream_id = bt_get_unsigned_int(field);
1820 }
1821 }
1822
1823 if (!first_packet && file_stream->parent.stream_id != stream_id) {
1824 fprintf(stderr, "[error] Stream ID is changing within a stream: expecting %" PRIu64 ", but packet has %" PRIu64 "\n",
1825 stream_id,
1826 file_stream->parent.stream_id);
1827 return -EINVAL;
1828 }
1829 if (first_packet) {
1830 ret = stream_assign_class(td, file_stream, stream_id);
1831 if (ret)
1832 return ret;
1833 }
1834
1835 if (file_stream->parent.stream_packet_context) {
1836 /* Read packet context */
1837 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1838 if (ret) {
1839 if (ret == -EFAULT)
1840 goto retry;
1841 fprintf(stderr, "[error] Unable to read packet context: %s\n", strerror(-ret));
1842 return ret;
1843 }
1844 /* read packet size from header */
1845 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size"));
1846 if (len_index >= 0) {
1847 struct bt_definition *field;
1848
1849 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1850 packet_index.packet_size = bt_get_unsigned_int(field);
1851 } else {
1852 /* Use file size for packet size */
1853 packet_index.packet_size = pos->file_length * CHAR_BIT;
1854 }
1855
1856 /* read content size from header */
1857 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size"));
1858 if (len_index >= 0) {
1859 struct bt_definition *field;
1860
1861 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1862 packet_index.content_size = bt_get_unsigned_int(field);
1863 } else {
1864 /* Use packet size if non-zero, else file size */
1865 packet_index.content_size = packet_index.packet_size ? : pos->file_length * CHAR_BIT;
1866 }
1867
1868 /* read timestamp begin from header */
1869 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin"));
1870 if (len_index >= 0) {
1871 struct bt_definition *field;
1872
1873 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1874 packet_index.ts_cycles.timestamp_begin = bt_get_unsigned_int(field);
1875 if (file_stream->parent.stream_class->trace->parent.collection) {
1876 packet_index.ts_real.timestamp_begin =
1877 ctf_get_real_timestamp(
1878 &file_stream->parent,
1879 packet_index.ts_cycles.timestamp_begin);
1880 }
1881 }
1882
1883 /* read timestamp end from header */
1884 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end"));
1885 if (len_index >= 0) {
1886 struct bt_definition *field;
1887
1888 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1889 packet_index.ts_cycles.timestamp_end = bt_get_unsigned_int(field);
1890 if (file_stream->parent.stream_class->trace->parent.collection) {
1891 packet_index.ts_real.timestamp_end =
1892 ctf_get_real_timestamp(
1893 &file_stream->parent,
1894 packet_index.ts_cycles.timestamp_end);
1895 }
1896 }
1897
1898 /* read events discarded from header */
1899 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("events_discarded"));
1900 if (len_index >= 0) {
1901 struct bt_definition *field;
1902
1903 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1904 packet_index.events_discarded = bt_get_unsigned_int(field);
1905 packet_index.events_discarded_len = bt_get_int_len(field);
1906 }
1907
1908 /* read packet_seq_num from header */
1909 len_index = bt_struct_declaration_lookup_field_index(
1910 file_stream->parent.stream_packet_context->declaration,
1911 g_quark_from_static_string("packet_seq_num"));
1912 if (len_index >= 0) {
1913 struct bt_definition *field;
1914
1915 field = bt_struct_definition_get_field_from_index(
1916 file_stream->parent.stream_packet_context,
1917 len_index);
1918 packet_index.packet_seq_num = bt_get_unsigned_int(field);
1919 }
1920 } else {
1921 /* Use file size for packet size */
1922 packet_index.packet_size = pos->file_length * CHAR_BIT;
1923 /* Use packet size if non-zero, else file size */
1924 packet_index.content_size = packet_index.packet_size ? : pos->file_length * CHAR_BIT;
1925 }
1926
1927 /* Validate content size and packet size values */
1928 if (packet_index.content_size > packet_index.packet_size) {
1929 fprintf(stderr, "[error] Content size (%" PRIu64 " bits) is larger than packet size (%" PRIu64 " bits).\n",
1930 packet_index.content_size, packet_index.packet_size);
1931 return -EINVAL;
1932 }
1933
1934 if (packet_index.content_size < pos->offset) {
1935 fprintf(stderr, "[error] Invalid CTF stream: content size is smaller than packet headers.\n");
1936 return -EINVAL;
1937 }
1938
1939 if ((packet_index.packet_size >> LOG2_CHAR_BIT) == 0) {
1940 fprintf(stderr, "[error] Invalid CTF stream: packet size needs to be at least one byte\n");
1941 return -EINVAL;
1942 }
1943
1944 /* Save position after header and context */
1945 packet_index.data_offset = pos->offset;
1946
1947 /* add index to packet array */
1948 g_array_append_val(file_stream->pos.packet_index, packet_index);
1949
1950 pos->mmap_offset += packet_index.packet_size >> LOG2_CHAR_BIT;
1951
1952 return 0;
1953
1954 /* Retry with larger mapping */
1955 retry:
1956 if (packet_map_len == ((pos->file_length - pos->mmap_offset) << LOG2_CHAR_BIT)) {
1957 /*
1958 * Reached EOF, but still expecting header/context data.
1959 */
1960 fprintf(stderr, "[error] Reached end of file, but still expecting header or context fields.\n");
1961 return -EFAULT;
1962 }
1963 /* Double the mapping len, and retry */
1964 tmp_map_len = packet_map_len << 1;
1965 if (tmp_map_len >> 1 != packet_map_len) {
1966 /* Overflow */
1967 fprintf(stderr, "[error] Packet mapping length overflow\n");
1968 return -EFAULT;
1969 }
1970 packet_map_len = tmp_map_len;
1971 goto begin;
1972 }
1973
1974 static
1975 int create_stream_packet_index(struct ctf_trace *td,
1976 struct ctf_file_stream *file_stream)
1977 {
1978 struct ctf_stream_pos *pos;
1979 int ret;
1980
1981 pos = &file_stream->pos;
1982
1983 /* Deal with empty files */
1984 if (!pos->file_length) {
1985 if (file_stream->parent.trace_packet_header
1986 || file_stream->parent.stream_packet_context) {
1987 /*
1988 * We expect a trace packet header and/or stream packet
1989 * context. Since a trace needs to have at least one
1990 * packet, empty files are therefore not accepted.
1991 */
1992 fprintf(stderr, "[error] Encountered an empty file, but expecting a trace packet header.\n");
1993 return -EINVAL;
1994 } else {
1995 /*
1996 * Without trace packet header nor stream packet
1997 * context, a one-packet trace can indeed be empty. This
1998 * is only valid if there is only one stream class: 0.
1999 */
2000 ret = stream_assign_class(td, file_stream, 0);
2001 if (ret)
2002 return ret;
2003 return 0;
2004 }
2005 }
2006
2007 for (pos->mmap_offset = 0; pos->mmap_offset < pos->file_length; ) {
2008 ret = create_stream_one_packet_index(pos, td, file_stream);
2009 if (ret)
2010 return ret;
2011 }
2012 return 0;
2013 }
2014
2015 static
2016 int create_trace_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
2017 {
2018 int ret;
2019
2020 if (td->packet_header_decl) {
2021 struct bt_definition *definition =
2022 td->packet_header_decl->p.definition_new(&td->packet_header_decl->p,
2023 stream->parent_def_scope, 0, 0, "trace.packet.header");
2024 if (!definition) {
2025 ret = -EINVAL;
2026 goto error;
2027 }
2028 stream->trace_packet_header =
2029 container_of(definition, struct definition_struct, p);
2030 stream->parent_def_scope = stream->trace_packet_header->p.scope;
2031 }
2032
2033 return 0;
2034
2035 error:
2036 fprintf(stderr, "[error] Unable to create trace definitions: %s\n", strerror(-ret));
2037 return ret;
2038 }
2039
2040 static
2041 int import_stream_packet_index(struct ctf_trace *td,
2042 struct ctf_file_stream *file_stream)
2043 {
2044 struct ctf_stream_pos *pos;
2045 struct ctf_packet_index *ctf_index = NULL;
2046 struct ctf_packet_index_file_hdr index_hdr;
2047 struct packet_index index;
2048 uint32_t packet_index_len, index_minor;
2049 int ret = 0;
2050 int first_packet = 1;
2051 size_t len;
2052
2053 pos = &file_stream->pos;
2054
2055 len = fread(&index_hdr, sizeof(index_hdr), 1, pos->index_fp);
2056 if (len != 1) {
2057 perror("read index file header");
2058 goto error;
2059 }
2060
2061 /* Check the index header */
2062 if (be32toh(index_hdr.magic) != CTF_INDEX_MAGIC) {
2063 fprintf(stderr, "[error] wrong index magic\n");
2064 ret = -1;
2065 goto error;
2066 }
2067 if (be32toh(index_hdr.index_major) != CTF_INDEX_MAJOR) {
2068 fprintf(stderr, "[error] Incompatible index file %" PRIu32
2069 ".%" PRIu32 ", supported %d.%d\n",
2070 be32toh(index_hdr.index_major),
2071 be32toh(index_hdr.index_minor), CTF_INDEX_MAJOR,
2072 CTF_INDEX_MINOR);
2073 ret = -1;
2074 goto error;
2075 }
2076 index_minor = be32toh(index_hdr.index_minor);
2077
2078 packet_index_len = be32toh(index_hdr.packet_index_len);
2079 if (packet_index_len == 0) {
2080 fprintf(stderr, "[error] Packet index length cannot be 0.\n");
2081 ret = -1;
2082 goto error;
2083 }
2084 /*
2085 * Allocate the index length found in header, not internal
2086 * representation.
2087 */
2088 ctf_index = g_malloc0(packet_index_len);
2089 while (fread(ctf_index, packet_index_len, 1,
2090 pos->index_fp) == 1) {
2091 uint64_t stream_id;
2092 struct ctf_stream_declaration *stream = NULL;
2093
2094 memset(&index, 0, sizeof(index));
2095 index.offset = be64toh(ctf_index->offset);
2096 index.packet_size = be64toh(ctf_index->packet_size);
2097 index.content_size = be64toh(ctf_index->content_size);
2098 index.ts_cycles.timestamp_begin = be64toh(ctf_index->timestamp_begin);
2099 index.ts_cycles.timestamp_end = be64toh(ctf_index->timestamp_end);
2100 index.events_discarded = be64toh(ctf_index->events_discarded);
2101 index.events_discarded_len = 64;
2102 index.data_offset = -1;
2103 stream_id = be64toh(ctf_index->stream_id);
2104 if (index_minor >= 1) {
2105 index.stream_instance_id = be64toh(ctf_index->stream_instance_id);
2106 index.packet_seq_num = be64toh(ctf_index->packet_seq_num);
2107 }
2108
2109 if (!first_packet) {
2110 /* add index to packet array */
2111 g_array_append_val(file_stream->pos.packet_index, index);
2112 continue;
2113 }
2114
2115 file_stream->parent.stream_id = stream_id;
2116 if (stream_id < td->streams->len) {
2117 stream = g_ptr_array_index(td->streams, stream_id);
2118 }
2119 if (!stream) {
2120 fprintf(stderr, "[error] Stream %" PRIu64
2121 " is not declared in metadata.\n",
2122 stream_id);
2123 ret = -EINVAL;
2124 goto error;
2125 }
2126 file_stream->parent.stream_class = stream;
2127 ret = create_stream_definitions(td, &file_stream->parent);
2128 if (ret)
2129 goto error;
2130 first_packet = 0;
2131 /* add index to packet array */
2132 g_array_append_val(file_stream->pos.packet_index, index);
2133 }
2134
2135 /* Index containing only the header. */
2136 if (!file_stream->parent.stream_class) {
2137 ret = -1;
2138 goto error;
2139 }
2140
2141 ret = 0;
2142
2143 error:
2144 g_free(ctf_index);
2145 return ret;
2146 }
2147
2148 /*
2149 * Note: many file streams can inherit from the same stream class
2150 * description (metadata).
2151 */
2152 static
2153 int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
2154 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2155 int whence))
2156 {
2157 int ret, fd, closeret;
2158 struct ctf_file_stream *file_stream;
2159 struct stat statbuf;
2160 char *index_name;
2161
2162 fd = openat(td->dirfd, path, flags);
2163 if (fd < 0) {
2164 perror("File stream openat()");
2165 ret = fd;
2166 goto error;
2167 }
2168
2169 /* Don't try to mmap subdirectories. Skip them, return success. */
2170 ret = fstat(fd, &statbuf);
2171 if (ret) {
2172 perror("File stream fstat()");
2173 goto fstat_error;
2174 }
2175 if (S_ISDIR(statbuf.st_mode)) {
2176 if (strncmp(path, "index", 5) != 0) {
2177 fprintf(stderr, "[warning] Skipping directory '%s' "
2178 "found in trace\n", path);
2179 }
2180 ret = 0;
2181 goto fd_is_dir_ok;
2182 }
2183 if (!statbuf.st_size) {
2184 /** Skip empty files. */
2185 ret = 0;
2186 goto fd_is_empty_file;
2187 }
2188
2189 file_stream = g_new0(struct ctf_file_stream, 1);
2190 file_stream->pos.last_offset = LAST_OFFSET_POISON;
2191 file_stream->pos.fd = -1;
2192 file_stream->pos.index_fp = NULL;
2193 file_stream->pos.file_length = statbuf.st_size;
2194
2195 strncpy(file_stream->parent.path, path, PATH_MAX);
2196 file_stream->parent.path[PATH_MAX - 1] = '\0';
2197
2198 if (packet_seek) {
2199 file_stream->pos.packet_seek = packet_seek;
2200 } else {
2201 fprintf(stderr, "[error] packet_seek function undefined.\n");
2202 ret = -1;
2203 goto error_def;
2204 }
2205
2206 ret = ctf_init_pos(&file_stream->pos, &td->parent, fd, flags);
2207 if (ret)
2208 goto error_def;
2209 ret = create_trace_definitions(td, &file_stream->parent);
2210 if (ret)
2211 goto error_def;
2212 /*
2213 * For now, only a single clock per trace is supported.
2214 */
2215 file_stream->parent.current_clock = td->parent.single_clock;
2216
2217 /*
2218 * Allocate the index name for this stream and try to open it.
2219 */
2220 index_name = malloc((strlen(path) + sizeof(INDEX_PATH)) * sizeof(char));
2221 if (!index_name) {
2222 fprintf(stderr, "[error] Cannot allocate index filename\n");
2223 ret = -ENOMEM;
2224 goto error_def;
2225 }
2226 snprintf(index_name, strlen(path) + sizeof(INDEX_PATH),
2227 INDEX_PATH, path);
2228
2229 if (bt_faccessat(td->dirfd, td->parent.path, index_name, O_RDONLY, 0) < 0) {
2230 ret = create_stream_packet_index(td, file_stream);
2231 if (ret) {
2232 fprintf(stderr, "[error] Stream index creation error.\n");
2233 goto error_index;
2234 }
2235 } else {
2236 ret = openat(td->dirfd, index_name, flags);
2237 if (ret < 0) {
2238 perror("Index file openat()");
2239 ret = -1;
2240 goto error_free;
2241 }
2242 file_stream->pos.index_fp = fdopen(ret, "r");
2243 if (!file_stream->pos.index_fp) {
2244 perror("fdopen() error");
2245 goto error_free;
2246 }
2247 ret = import_stream_packet_index(td, file_stream);
2248 if (ret) {
2249 ret = -1;
2250 goto error_index;
2251 }
2252 ret = fclose(file_stream->pos.index_fp);
2253 if (ret < 0) {
2254 perror("close index");
2255 goto error_free;
2256 }
2257 }
2258 free(index_name);
2259
2260 /* Add stream file to stream class */
2261 g_ptr_array_add(file_stream->parent.stream_class->streams,
2262 &file_stream->parent);
2263 return 0;
2264
2265 error_index:
2266 if (file_stream->pos.index_fp) {
2267 ret = fclose(file_stream->pos.index_fp);
2268 if (ret < 0) {
2269 perror("close index");
2270 }
2271 }
2272 if (file_stream->parent.trace_packet_header)
2273 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
2274 error_free:
2275 free(index_name);
2276 error_def:
2277 closeret = ctf_fini_pos(&file_stream->pos);
2278 if (closeret) {
2279 fprintf(stderr, "Error on ctf_fini_pos\n");
2280 }
2281 g_free(file_stream);
2282 fd_is_empty_file:
2283 fd_is_dir_ok:
2284 fstat_error:
2285 closeret = close(fd);
2286 if (closeret) {
2287 perror("Error on fd close");
2288 }
2289 error:
2290 return ret;
2291 }
2292
2293 static
2294 int ctf_open_trace_read(struct ctf_trace *td,
2295 const char *path, int flags,
2296 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2297 int whence), FILE *metadata_fp)
2298 {
2299 struct ctf_scanner *scanner;
2300 int ret, closeret;
2301 struct dirent *dirent;
2302 struct dirent *diriter;
2303 size_t dirent_len;
2304 char *ext;
2305
2306 td->flags = flags;
2307
2308 /* Open trace directory */
2309 td->dir = opendir(path);
2310 if (!td->dir) {
2311 fprintf(stderr, "[error] Unable to open trace directory \"%s\".\n", path);
2312 ret = -ENOENT;
2313 goto error;
2314 }
2315
2316 td->dirfd = open(path, 0);
2317 if (td->dirfd < 0) {
2318 fprintf(stderr, "[error] Unable to open trace directory file descriptor for path \"%s\".\n", path);
2319 perror("Trace directory open");
2320 ret = -errno;
2321 goto error_dirfd;
2322 }
2323 strncpy(td->parent.path, path, sizeof(td->parent.path));
2324 td->parent.path[sizeof(td->parent.path) - 1] = '\0';
2325
2326 /*
2327 * Keep the metadata file separate.
2328 * Keep scanner object local to the open. We don't support
2329 * incremental metadata append for on-disk traces.
2330 */
2331 scanner = ctf_scanner_alloc();
2332 if (!scanner) {
2333 fprintf(stderr, "[error] Error allocating scanner\n");
2334 ret = -ENOMEM;
2335 goto error_metadata;
2336 }
2337 ret = ctf_trace_metadata_read(td, metadata_fp, scanner, 0);
2338 ctf_scanner_free(scanner);
2339 if (ret) {
2340 if (ret == -ENOENT) {
2341 fprintf(stderr, "[warning] Empty metadata.\n");
2342 }
2343 fprintf(stderr, "[warning] Unable to open trace metadata for path \"%s\".\n", path);
2344 goto error_metadata;
2345 }
2346
2347 /*
2348 * Open each stream: for each file, try to open, check magic
2349 * number, and get the stream ID to add to the right location in
2350 * the stream array.
2351 */
2352
2353 dirent_len = offsetof(struct dirent, d_name) +
2354 fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
2355
2356 dirent = malloc(dirent_len);
2357
2358 for (;;) {
2359 ret = readdir_r(td->dir, dirent, &diriter);
2360 if (ret) {
2361 fprintf(stderr, "[error] Readdir error.\n");
2362 goto readdir_error;
2363 }
2364 if (!diriter)
2365 break;
2366 /* Ignore hidden files, ., .. and metadata. */
2367 if (!strncmp(diriter->d_name, ".", 1)
2368 || !strcmp(diriter->d_name, "..")
2369 || !strcmp(diriter->d_name, "metadata"))
2370 continue;
2371
2372 /* Ignore index files : *.idx */
2373 ext = strrchr(diriter->d_name, '.');
2374 if (ext && (!strcmp(ext, ".idx"))) {
2375 continue;
2376 }
2377
2378 ret = ctf_open_file_stream_read(td, diriter->d_name,
2379 flags, packet_seek);
2380 if (ret) {
2381 fprintf(stderr, "[error] Open file stream error.\n");
2382 goto readdir_error;
2383 }
2384 }
2385
2386 free(dirent);
2387 return 0;
2388
2389 readdir_error:
2390 free(dirent);
2391 error_metadata:
2392 closeret = close(td->dirfd);
2393 if (closeret) {
2394 perror("Error on fd close");
2395 }
2396 error_dirfd:
2397 closeret = closedir(td->dir);
2398 if (closeret) {
2399 perror("Error on closedir");
2400 }
2401 error:
2402 return ret;
2403 }
2404
2405 /*
2406 * ctf_open_trace: Open a CTF trace and index it.
2407 * Note that the user must seek the trace after the open (using the iterator)
2408 * since the index creation read it entirely.
2409 */
2410 static
2411 struct bt_trace_descriptor *ctf_open_trace(const char *path, int flags,
2412 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2413 int whence), FILE *metadata_fp)
2414 {
2415 struct ctf_trace *td;
2416 int ret;
2417
2418 /*
2419 * If packet_seek is NULL, we provide our default version.
2420 */
2421 if (!packet_seek)
2422 packet_seek = ctf_packet_seek;
2423
2424 td = g_new0(struct ctf_trace, 1);
2425 if (!td) {
2426 goto error;
2427 }
2428 init_trace_descriptor(&td->parent);
2429
2430 switch (flags & O_ACCMODE) {
2431 case O_RDONLY:
2432 if (!path) {
2433 fprintf(stderr, "[error] Path missing for input CTF trace.\n");
2434 goto error;
2435 }
2436 ret = ctf_open_trace_read(td, path, flags, packet_seek, metadata_fp);
2437 if (ret)
2438 goto error;
2439 break;
2440 case O_RDWR:
2441 fprintf(stderr, "[error] Opening CTF traces for output is not supported yet.\n");
2442 goto error;
2443 default:
2444 fprintf(stderr, "[error] Incorrect open flags.\n");
2445 goto error;
2446 }
2447
2448 ret = trace_debug_info_create(td);
2449 if (ret) {
2450 goto error;
2451 }
2452
2453 return &td->parent;
2454 error:
2455 if (td) {
2456 trace_debug_info_destroy(td);
2457 g_free(td);
2458 }
2459 return NULL;
2460 }
2461
2462 static
2463 void ctf_init_mmap_pos(struct ctf_stream_pos *pos,
2464 struct bt_mmap_stream *mmap_info)
2465 {
2466 pos->mmap_offset = 0;
2467 pos->packet_size = 0;
2468 pos->content_size = 0;
2469 pos->content_size_loc = NULL;
2470 pos->fd = mmap_info->fd;
2471 pos->base_mma = NULL;
2472 pos->offset = 0;
2473 pos->dummy = false;
2474 pos->cur_index = 0;
2475 pos->prot = PROT_READ;
2476 pos->flags = MAP_PRIVATE;
2477 pos->parent.rw_table = read_dispatch_table;
2478 pos->parent.event_cb = ctf_read_event;
2479 pos->priv = mmap_info->priv;
2480 pos->packet_index = g_array_new(FALSE, TRUE,
2481 sizeof(struct packet_index));
2482 }
2483
2484 static
2485 int prepare_mmap_stream_definition(struct ctf_trace *td,
2486 struct ctf_file_stream *file_stream,
2487 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2488 int whence))
2489 {
2490 struct ctf_stream_declaration *stream;
2491 uint64_t stream_id;
2492 int ret;
2493
2494 /* Ask for the first packet to get the stream_id. */
2495 packet_seek(&file_stream->pos.parent, 0, SEEK_SET);
2496 ret = bt_packet_seek_get_error();
2497 if (ret) {
2498 goto end;
2499 }
2500 stream_id = file_stream->parent.stream_id;
2501 if (stream_id >= td->streams->len) {
2502 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
2503 "in metadata.\n", stream_id);
2504 ret = -EINVAL;
2505 goto end;
2506 }
2507 stream = g_ptr_array_index(td->streams, stream_id);
2508 if (!stream) {
2509 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
2510 "in metadata.\n", stream_id);
2511 ret = -EINVAL;
2512 goto end;
2513 }
2514 file_stream->parent.stream_class = stream;
2515 ret = create_stream_definitions(td, &file_stream->parent);
2516 end:
2517 return ret;
2518 }
2519
2520 static
2521 int ctf_open_mmap_stream_read(struct ctf_trace *td,
2522 struct bt_mmap_stream *mmap_info,
2523 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2524 int whence))
2525 {
2526 int ret;
2527 struct ctf_file_stream *file_stream;
2528
2529 file_stream = g_new0(struct ctf_file_stream, 1);
2530 file_stream->parent.stream_id = -1ULL;
2531 file_stream->pos.last_offset = LAST_OFFSET_POISON;
2532 ctf_init_mmap_pos(&file_stream->pos, mmap_info);
2533
2534 file_stream->pos.packet_seek = packet_seek;
2535
2536 ret = create_trace_definitions(td, &file_stream->parent);
2537 if (ret) {
2538 goto error_def;
2539 }
2540
2541 ret = prepare_mmap_stream_definition(td, file_stream, packet_seek);
2542 if (ret)
2543 goto error_index;
2544
2545 /*
2546 * For now, only a single clock per trace is supported.
2547 */
2548 file_stream->parent.current_clock = td->parent.single_clock;
2549
2550 /* Add stream file to stream class */
2551 g_ptr_array_add(file_stream->parent.stream_class->streams,
2552 &file_stream->parent);
2553 return 0;
2554
2555 error_index:
2556 if (file_stream->parent.trace_packet_header)
2557 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
2558 error_def:
2559 g_free(file_stream);
2560 return ret;
2561 }
2562
2563 static
2564 int ctf_open_mmap_trace_read(struct ctf_trace *td,
2565 struct bt_mmap_stream_list *mmap_list,
2566 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2567 int whence),
2568 FILE *metadata_fp)
2569 {
2570 int ret;
2571 struct bt_mmap_stream *mmap_info;
2572
2573 td->scanner = ctf_scanner_alloc();
2574 if (!td->scanner) {
2575 fprintf(stderr, "[error] Error allocating scanner\n");
2576 ret = -ENOMEM;
2577 goto error;
2578 }
2579 ret = ctf_trace_metadata_read(td, metadata_fp, td->scanner, 0);
2580 if (ret) {
2581 if (ret == -ENOENT) {
2582 fprintf(stderr, "[warning] Empty metadata.\n");
2583 }
2584 goto error;
2585 }
2586
2587 /*
2588 * for each stream, try to open, check magic number, and get the
2589 * stream ID to add to the right location in the stream array.
2590 */
2591 bt_list_for_each_entry(mmap_info, &mmap_list->head, list) {
2592 ret = ctf_open_mmap_stream_read(td, mmap_info, packet_seek);
2593 if (ret) {
2594 fprintf(stderr, "[error] Open file mmap stream error.\n");
2595 goto error;
2596 }
2597 }
2598 return 0;
2599
2600 error:
2601 ctf_scanner_free(td->scanner);
2602 return ret;
2603 }
2604
2605 static
2606 struct bt_trace_descriptor *ctf_open_mmap_trace(
2607 struct bt_mmap_stream_list *mmap_list,
2608 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2609 int whence),
2610 FILE *metadata_fp)
2611 {
2612 struct ctf_trace *td;
2613 int ret;
2614
2615 if (!metadata_fp) {
2616 fprintf(stderr, "[error] No metadata file pointer associated, "
2617 "required for mmap parsing\n");
2618 goto error;
2619 }
2620 if (!packet_seek) {
2621 fprintf(stderr, "[error] packet_seek function undefined.\n");
2622 goto error;
2623 }
2624 td = g_new0(struct ctf_trace, 1);
2625 td->dirfd = -1;
2626 ret = ctf_open_mmap_trace_read(td, mmap_list, packet_seek, metadata_fp);
2627 if (ret)
2628 goto error_free;
2629
2630 ret = trace_debug_info_create(td);
2631 if (ret) {
2632 goto error_free;
2633 }
2634
2635 return &td->parent;
2636
2637 error_free:
2638 g_free(td);
2639 error:
2640 return NULL;
2641 }
2642
2643 int ctf_append_trace_metadata(struct bt_trace_descriptor *tdp,
2644 FILE *metadata_fp)
2645 {
2646 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2647 int i, j;
2648 int ret;
2649
2650 if (!td->scanner)
2651 return -EINVAL;
2652 ret = ctf_trace_metadata_read(td, metadata_fp, td->scanner, 1);
2653 if (ret)
2654 return ret;
2655 /* for each stream_class */
2656 for (i = 0; i < td->streams->len; i++) {
2657 struct ctf_stream_declaration *stream_class;
2658
2659 stream_class = g_ptr_array_index(td->streams, i);
2660 if (!stream_class)
2661 continue;
2662 /* for each stream */
2663 for (j = 0; j < stream_class->streams->len; j++) {
2664 struct ctf_stream_definition *stream;
2665
2666 stream = g_ptr_array_index(stream_class->streams, j);
2667 if (!stream)
2668 continue;
2669 ret = copy_event_declarations_stream_class_to_stream(td,
2670 stream_class, stream);
2671 if (ret)
2672 return ret;
2673 }
2674 }
2675 return 0;
2676 }
2677
2678 static
2679 int ctf_convert_index_timestamp(struct bt_trace_descriptor *tdp)
2680 {
2681 int i, j, k;
2682 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2683
2684 /* for each stream_class */
2685 for (i = 0; i < td->streams->len; i++) {
2686 struct ctf_stream_declaration *stream_class;
2687
2688 stream_class = g_ptr_array_index(td->streams, i);
2689 if (!stream_class)
2690 continue;
2691 /* for each file_stream */
2692 for (j = 0; j < stream_class->streams->len; j++) {
2693 struct ctf_stream_definition *stream;
2694 struct ctf_stream_pos *stream_pos;
2695 struct ctf_file_stream *cfs;
2696
2697 stream = g_ptr_array_index(stream_class->streams, j);
2698 if (!stream)
2699 continue;
2700 cfs = container_of(stream, struct ctf_file_stream,
2701 parent);
2702 stream_pos = &cfs->pos;
2703 if (!stream_pos->packet_index)
2704 continue;
2705
2706 for (k = 0; k < stream_pos->packet_index->len; k++) {
2707 struct packet_index *index;
2708
2709 index = &g_array_index(stream_pos->packet_index,
2710 struct packet_index, k);
2711 index->ts_real.timestamp_begin =
2712 ctf_get_real_timestamp(stream,
2713 index->ts_cycles.timestamp_begin);
2714 index->ts_real.timestamp_end =
2715 ctf_get_real_timestamp(stream,
2716 index->ts_cycles.timestamp_end);
2717 }
2718 }
2719 }
2720 return 0;
2721 }
2722
2723 static
2724 int ctf_close_file_stream(struct ctf_file_stream *file_stream)
2725 {
2726 int ret;
2727
2728 ret = ctf_fini_pos(&file_stream->pos);
2729 if (ret) {
2730 fprintf(stderr, "Error on ctf_fini_pos\n");
2731 return -1;
2732 }
2733 if (file_stream->pos.fd >= 0) {
2734 ret = close(file_stream->pos.fd);
2735 if (ret) {
2736 perror("Error closing file fd");
2737 return -1;
2738 }
2739 }
2740 return 0;
2741 }
2742
2743 static
2744 int ctf_close_trace(struct bt_trace_descriptor *tdp)
2745 {
2746 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2747 int ret;
2748
2749 if (td->streams) {
2750 int i;
2751
2752 for (i = 0; i < td->streams->len; i++) {
2753 struct ctf_stream_declaration *stream;
2754 int j;
2755
2756 stream = g_ptr_array_index(td->streams, i);
2757 if (!stream)
2758 continue;
2759 for (j = 0; j < stream->streams->len; j++) {
2760 struct ctf_file_stream *file_stream;
2761 file_stream = container_of(g_ptr_array_index(stream->streams, j),
2762 struct ctf_file_stream, parent);
2763 ret = ctf_close_file_stream(file_stream);
2764 if (ret)
2765 return ret;
2766 }
2767 }
2768 }
2769 ctf_destroy_metadata(td);
2770 ctf_scanner_free(td->scanner);
2771 if (td->dirfd >= 0) {
2772 ret = close(td->dirfd);
2773 if (ret) {
2774 perror("Error closing dirfd");
2775 return ret;
2776 }
2777 }
2778 if (td->dir) {
2779 ret = closedir(td->dir);
2780 if (ret) {
2781 perror("Error closedir");
2782 return ret;
2783 }
2784 }
2785 free(td->metadata_string);
2786 trace_debug_info_destroy(td);
2787 g_free(td);
2788 return 0;
2789 }
2790
2791 static
2792 void ctf_set_context(struct bt_trace_descriptor *descriptor,
2793 struct bt_context *ctx)
2794 {
2795 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2796 parent);
2797
2798 td->parent.ctx = ctx;
2799 }
2800
2801 static
2802 void ctf_set_handle(struct bt_trace_descriptor *descriptor,
2803 struct bt_trace_handle *handle)
2804 {
2805 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2806 parent);
2807
2808 td->parent.handle = handle;
2809 }
2810
2811 static
2812 void __attribute__((constructor)) ctf_init(void)
2813 {
2814 int ret;
2815
2816 ctf_format.name = g_quark_from_static_string("ctf");
2817 ret = bt_register_format(&ctf_format);
2818 assert(!ret);
2819 }
2820
2821 static
2822 void __attribute__((destructor)) ctf_exit(void)
2823 {
2824 bt_unregister_format(&ctf_format);
2825 }
BabelTrace - Trace Format Babel Tower
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