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Propagate error from packet_seek in case of truncated packet
[babeltrace.git] / formats / ctf / ctf.c
1 /*
2 * BabelTrace - Common Trace Format (CTF)
3 *
4 * Format registration.
5 *
6 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
7 *
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining a copy
11 * of this software and associated documentation files (the "Software"), to deal
12 * in the Software without restriction, including without limitation the rights
13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the Software is
15 * furnished to do so, subject to the following conditions:
16 *
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
23 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 * SOFTWARE.
27 */
28
29 #include <babeltrace/format.h>
30 #include <babeltrace/format-internal.h>
31 #include <babeltrace/ctf/types.h>
32 #include <babeltrace/ctf/metadata.h>
33 #include <babeltrace/babeltrace-internal.h>
34 #include <babeltrace/ctf/events-internal.h>
35 #include <babeltrace/trace-handle-internal.h>
36 #include <babeltrace/context-internal.h>
37 #include <babeltrace/compat/uuid.h>
38 #include <babeltrace/endian.h>
39 #include <babeltrace/error.h>
40 #include <babeltrace/trace-debug-info.h>
41 #include <babeltrace/ctf/ctf-index.h>
42 #include <inttypes.h>
43 #include <stdio.h>
44 #include <sys/mman.h>
45 #include <errno.h>
46 #include <sys/types.h>
47 #include <sys/stat.h>
48 #include <fcntl.h>
49 #include <dirent.h>
50 #include <glib.h>
51 #include <unistd.h>
52 #include <stdlib.h>
53
54 #include "metadata/ctf-scanner.h"
55 #include "metadata/ctf-parser.h"
56 #include "metadata/ctf-ast.h"
57 #include "events-private.h"
58 #include <babeltrace/compat/memstream.h>
59 #include <babeltrace/compat/fcntl.h>
60
61 #define LOG2_CHAR_BIT 3
62
63 /*
64 * Length of first attempt at mapping a packet header, in bits.
65 */
66 #define DEFAULT_HEADER_LEN (getpagesize() * CHAR_BIT)
67
68 /*
69 * Lenght of packet to write, in bits.
70 */
71 #define WRITE_PACKET_LEN (getpagesize() * 8 * CHAR_BIT)
72
73 #define NSEC_PER_SEC 1000000000ULL
74
75 #define INDEX_PATH "./index/%s.idx"
76
77 int opt_clock_cycles,
78 opt_clock_seconds,
79 opt_clock_date,
80 opt_clock_gmt;
81
82 uint64_t opt_clock_offset;
83 uint64_t opt_clock_offset_ns;
84
85 extern int yydebug;
86 char *opt_debug_info_dir;
87 char *opt_debug_info_target_prefix;
88
89 /*
90 * TODO: babeltrace_ctf_console_output ensures that we only print
91 * discarded events when ctf-text plugin is used. Should be cleaned up
92 * with the plugin system redesign.
93 */
94 int babeltrace_ctf_console_output;
95
96 static
97 struct bt_trace_descriptor *ctf_open_trace(const char *path, int flags,
98 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
99 int whence),
100 FILE *metadata_fp);
101 static
102 struct bt_trace_descriptor *ctf_open_mmap_trace(
103 struct bt_mmap_stream_list *mmap_list,
104 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
105 int whence),
106 FILE *metadata_fp);
107 static
108 void ctf_set_context(struct bt_trace_descriptor *descriptor,
109 struct bt_context *ctx);
110 static
111 void ctf_set_handle(struct bt_trace_descriptor *descriptor,
112 struct bt_trace_handle *handle);
113
114 static
115 int ctf_close_trace(struct bt_trace_descriptor *descriptor);
116 static
117 uint64_t ctf_timestamp_begin(struct bt_trace_descriptor *descriptor,
118 struct bt_trace_handle *handle, enum bt_clock_type type);
119 static
120 uint64_t ctf_timestamp_end(struct bt_trace_descriptor *descriptor,
121 struct bt_trace_handle *handle, enum bt_clock_type type);
122 static
123 int ctf_convert_index_timestamp(struct bt_trace_descriptor *tdp);
124
125 static
126 rw_dispatch read_dispatch_table[] = {
127 [ CTF_TYPE_INTEGER ] = ctf_integer_read,
128 [ CTF_TYPE_FLOAT ] = ctf_float_read,
129 [ CTF_TYPE_ENUM ] = ctf_enum_read,
130 [ CTF_TYPE_STRING ] = ctf_string_read,
131 [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
132 [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
133 [ CTF_TYPE_ARRAY ] = ctf_array_read,
134 [ CTF_TYPE_SEQUENCE ] = ctf_sequence_read,
135 };
136
137 static
138 rw_dispatch write_dispatch_table[] = {
139 [ CTF_TYPE_INTEGER ] = ctf_integer_write,
140 [ CTF_TYPE_FLOAT ] = ctf_float_write,
141 [ CTF_TYPE_ENUM ] = ctf_enum_write,
142 [ CTF_TYPE_STRING ] = ctf_string_write,
143 [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
144 [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
145 [ CTF_TYPE_ARRAY ] = ctf_array_write,
146 [ CTF_TYPE_SEQUENCE ] = ctf_sequence_write,
147 };
148
149 static
150 struct bt_format ctf_format = {
151 .open_trace = ctf_open_trace,
152 .open_mmap_trace = ctf_open_mmap_trace,
153 .close_trace = ctf_close_trace,
154 .set_context = ctf_set_context,
155 .set_handle = ctf_set_handle,
156 .timestamp_begin = ctf_timestamp_begin,
157 .timestamp_end = ctf_timestamp_end,
158 .convert_index_timestamp = ctf_convert_index_timestamp,
159 };
160
161 static
162 uint64_t ctf_timestamp_begin(struct bt_trace_descriptor *descriptor,
163 struct bt_trace_handle *handle, enum bt_clock_type type)
164 {
165 struct ctf_trace *tin;
166 uint64_t begin = ULLONG_MAX;
167 int i, j;
168
169 tin = container_of(descriptor, struct ctf_trace, parent);
170
171 if (!tin)
172 goto error;
173
174 /* for each stream_class */
175 for (i = 0; i < tin->streams->len; i++) {
176 struct ctf_stream_declaration *stream_class;
177
178 stream_class = g_ptr_array_index(tin->streams, i);
179 if (!stream_class)
180 continue;
181 /* for each file_stream */
182 for (j = 0; j < stream_class->streams->len; j++) {
183 struct ctf_stream_definition *stream;
184 struct ctf_file_stream *cfs;
185 struct ctf_stream_pos *stream_pos;
186 struct packet_index *index;
187
188 stream = g_ptr_array_index(stream_class->streams, j);
189 cfs = container_of(stream, struct ctf_file_stream,
190 parent);
191 stream_pos = &cfs->pos;
192
193 if (!stream_pos->packet_index)
194 goto error;
195
196 if (stream_pos->packet_index->len <= 0)
197 continue;
198
199 index = &g_array_index(stream_pos->packet_index,
200 struct packet_index,
201 stream_pos->packet_index->len - 1);
202 if (type == BT_CLOCK_REAL) {
203 if (index->ts_real.timestamp_begin < begin)
204 begin = index->ts_real.timestamp_begin;
205 } else if (type == BT_CLOCK_CYCLES) {
206 if (index->ts_cycles.timestamp_begin < begin)
207 begin = index->ts_cycles.timestamp_begin;
208 } else {
209 goto error;
210 }
211 }
212 }
213
214 return begin;
215
216 error:
217 return -1ULL;
218 }
219
220 static
221 uint64_t ctf_timestamp_end(struct bt_trace_descriptor *descriptor,
222 struct bt_trace_handle *handle, enum bt_clock_type type)
223 {
224 struct ctf_trace *tin;
225 uint64_t end = 0;
226 int i, j;
227
228 tin = container_of(descriptor, struct ctf_trace, parent);
229
230 if (!tin)
231 goto error;
232
233 /* for each stream_class */
234 for (i = 0; i < tin->streams->len; i++) {
235 struct ctf_stream_declaration *stream_class;
236
237 stream_class = g_ptr_array_index(tin->streams, i);
238 if (!stream_class)
239 continue;
240 /* for each file_stream */
241 for (j = 0; j < stream_class->streams->len; j++) {
242 struct ctf_stream_definition *stream;
243 struct ctf_file_stream *cfs;
244 struct ctf_stream_pos *stream_pos;
245 struct packet_index *index;
246
247 stream = g_ptr_array_index(stream_class->streams, j);
248 cfs = container_of(stream, struct ctf_file_stream,
249 parent);
250 stream_pos = &cfs->pos;
251
252 if (!stream_pos->packet_index)
253 goto error;
254
255 if (stream_pos->packet_index->len <= 0)
256 continue;
257
258 index = &g_array_index(stream_pos->packet_index,
259 struct packet_index,
260 stream_pos->packet_index->len - 1);
261 if (type == BT_CLOCK_REAL) {
262 if (index->ts_real.timestamp_end > end)
263 end = index->ts_real.timestamp_end;
264 } else if (type == BT_CLOCK_CYCLES) {
265 if (index->ts_cycles.timestamp_end > end)
266 end = index->ts_cycles.timestamp_end;
267 } else {
268 goto error;
269 }
270 }
271 }
272
273 return end;
274
275 error:
276 return -1ULL;
277 }
278
279 /*
280 * Update stream current timestamp
281 */
282 static
283 void ctf_update_timestamp(struct ctf_stream_definition *stream,
284 struct definition_integer *integer_definition)
285 {
286 struct declaration_integer *integer_declaration =
287 integer_definition->declaration;
288 uint64_t oldval, newval, updateval;
289
290 if (unlikely(integer_declaration->len == 64)) {
291 stream->cycles_timestamp = integer_definition->value._unsigned;
292 stream->real_timestamp = ctf_get_real_timestamp(stream,
293 stream->cycles_timestamp);
294 return;
295 }
296 /* keep low bits */
297 oldval = stream->cycles_timestamp;
298 oldval &= (1ULL << integer_declaration->len) - 1;
299 newval = integer_definition->value._unsigned;
300 /* Test for overflow by comparing low bits */
301 if (newval < oldval)
302 newval += 1ULL << integer_declaration->len;
303 /* updateval contains old high bits, and new low bits (sum) */
304 updateval = stream->cycles_timestamp;
305 updateval &= ~((1ULL << integer_declaration->len) - 1);
306 updateval += newval;
307 stream->cycles_timestamp = updateval;
308
309 /* convert to real timestamp */
310 stream->real_timestamp = ctf_get_real_timestamp(stream,
311 stream->cycles_timestamp);
312 }
313
314 /*
315 * Print timestamp, rescaling clock frequency to nanoseconds and
316 * applying offsets as needed (unix time).
317 */
318 static
319 void ctf_print_timestamp_real(FILE *fp,
320 struct ctf_stream_definition *stream,
321 uint64_t timestamp)
322 {
323 uint64_t ts_sec = 0, ts_nsec;
324
325 ts_nsec = timestamp;
326
327 /* Add command-line offset in ns*/
328 ts_nsec += opt_clock_offset_ns;
329
330 /* Add command-line offset */
331 ts_sec += opt_clock_offset;
332
333 ts_sec += ts_nsec / NSEC_PER_SEC;
334 ts_nsec = ts_nsec % NSEC_PER_SEC;
335
336 if (!opt_clock_seconds) {
337 struct tm tm;
338 time_t time_s = (time_t) ts_sec;
339
340 if (!opt_clock_gmt) {
341 struct tm *res;
342
343 res = localtime_r(&time_s, &tm);
344 if (!res) {
345 fprintf(stderr, "[warning] Unable to get localtime.\n");
346 goto seconds;
347 }
348 } else {
349 struct tm *res;
350
351 res = gmtime_r(&time_s, &tm);
352 if (!res) {
353 fprintf(stderr, "[warning] Unable to get gmtime.\n");
354 goto seconds;
355 }
356 }
357 if (opt_clock_date) {
358 char timestr[26];
359 size_t res;
360
361 /* Print date and time */
362 res = strftime(timestr, sizeof(timestr),
363 "%F ", &tm);
364 if (!res) {
365 fprintf(stderr, "[warning] Unable to print ascii time.\n");
366 goto seconds;
367 }
368 fprintf(fp, "%s", timestr);
369 }
370 /* Print time in HH:MM:SS.ns */
371 fprintf(fp, "%02d:%02d:%02d.%09" PRIu64,
372 tm.tm_hour, tm.tm_min, tm.tm_sec, ts_nsec);
373 goto end;
374 }
375 seconds:
376 fprintf(fp, "%3" PRIu64 ".%09" PRIu64,
377 ts_sec, ts_nsec);
378
379 end:
380 return;
381 }
382
383 /*
384 * Print timestamp, in cycles
385 */
386 static
387 void ctf_print_timestamp_cycles(FILE *fp,
388 struct ctf_stream_definition *stream,
389 uint64_t timestamp)
390 {
391 fprintf(fp, "%020" PRIu64, timestamp);
392 }
393
394 void ctf_print_timestamp(FILE *fp,
395 struct ctf_stream_definition *stream,
396 uint64_t timestamp)
397 {
398 if (opt_clock_cycles) {
399 ctf_print_timestamp_cycles(fp, stream, timestamp);
400 } else {
401 ctf_print_timestamp_real(fp, stream, timestamp);
402 }
403 }
404
405 static
406 void print_uuid(FILE *fp, unsigned char *uuid)
407 {
408 int i;
409
410 for (i = 0; i < BABELTRACE_UUID_LEN; i++)
411 fprintf(fp, "%x", (unsigned int) uuid[i]);
412 }
413
414 /*
415 * Discarded events can be either:
416 * - discarded after end of previous buffer due to buffer full:
417 * happened within range: [ prev_timestamp_end, timestamp_begin ]
418 * - discarded within current buffer due to either event too large or
419 * nested wrap-around:
420 * happened within range: [ timestamp_begin, timestamp_end ]
421 *
422 * Given we have discarded counters of those two types merged into the
423 * events_discarded counter, we need to use the union of those ranges:
424 * [ prev_timestamp_end, timestamp_end ]
425 *
426 * Lost packets occur if the tracer overwrote some subbuffer(s) before the
427 * consumer had time to extract them. We keep track of those gaps with the
428 * packet sequence number in each packet.
429 */
430 void ctf_print_discarded_lost(FILE *fp, struct ctf_stream_definition *stream)
431 {
432 if ((!stream->events_discarded && !stream->packets_lost) ||
433 !babeltrace_ctf_console_output) {
434 return;
435 }
436 fflush(stdout);
437 if (stream->events_discarded) {
438 fprintf(fp, "[warning] Tracer discarded %" PRIu64 " events between [",
439 stream->events_discarded);
440 } else if (stream->packets_lost) {
441 fprintf(fp, "[warning] Tracer lost %" PRIu64 " trace packets between [",
442 stream->packets_lost);
443 }
444 if (opt_clock_cycles) {
445 ctf_print_timestamp(fp, stream,
446 stream->prev.cycles.end);
447 fprintf(fp, "] and [");
448 ctf_print_timestamp(fp, stream,
449 stream->current.cycles.end);
450 } else {
451 ctf_print_timestamp(fp, stream,
452 stream->prev.real.end);
453 fprintf(fp, "] and [");
454 ctf_print_timestamp(fp, stream,
455 stream->current.real.end);
456 }
457 fprintf(fp, "] in trace UUID ");
458 print_uuid(fp, stream->stream_class->trace->uuid);
459 if (stream->stream_class->trace->parent.path[0])
460 fprintf(fp, ", at path: \"%s\"",
461 stream->stream_class->trace->parent.path);
462
463 fprintf(fp, ", within stream id %" PRIu64, stream->stream_id);
464 if (stream->path[0])
465 fprintf(fp, ", at relative path: \"%s\"", stream->path);
466 fprintf(fp, ". ");
467 fprintf(fp, "You should consider recording a new trace with larger "
468 "buffers or with fewer events enabled.\n");
469 fflush(fp);
470 }
471
472 static
473 void ctf_print_truncated_packet(FILE *fp, struct ctf_stream_definition *stream,
474 uint64_t packet_size, uint64_t remaining_file_size)
475 {
476 fprintf(fp, "[error] Packet size (%" PRIu64 " bits) is larger than remaining file size (%" PRIu64 " bits) in trace with UUID \"",
477 packet_size, remaining_file_size);
478 print_uuid(fp, stream->stream_class->trace->uuid);
479 fprintf(fp, "\"");
480
481 if (stream->stream_class->trace->parent.path[0] != '\0') {
482 fprintf(fp, ", at path: \"%s\"",
483 stream->stream_class->trace->parent.path);
484 }
485
486 fprintf(fp, ", within stream id %" PRIu64, stream->stream_id);
487 if (stream->path[0] != '\0') {
488 fprintf(fp, ", at relative path: \"%s\"", stream->path);
489 }
490
491 fprintf(fp, ".\n");
492 fflush(fp);
493 }
494
495 static
496 int ctf_read_event(struct bt_stream_pos *ppos, struct ctf_stream_definition *stream)
497 {
498 struct ctf_stream_pos *pos =
499 container_of(ppos, struct ctf_stream_pos, parent);
500 struct ctf_stream_declaration *stream_class = stream->stream_class;
501 struct ctf_event_definition *event;
502 uint64_t id = 0;
503 int ret;
504
505 /* We need to check for EOF here for empty files. */
506 if (unlikely(pos->offset == EOF))
507 return EOF;
508
509 ret = ctf_pos_get_event(pos);
510 if (ret == -BT_PACKET_SEEK_ERROR_TRUNCATED_PACKET) {
511 return -ERANGE;
512 } else if (ret) {
513 return EOF;
514 }
515
516 /* save the current position as a restore point */
517 pos->last_offset = pos->offset;
518
519 /*
520 * This is the EOF check after we've advanced the position in
521 * ctf_pos_get_event.
522 */
523 if (unlikely(pos->offset == EOF))
524 return EOF;
525
526 /* Stream is inactive for now (live reading). */
527 if (unlikely(pos->content_size == 0))
528 return EAGAIN;
529
530 /*
531 * Packet seeked to by ctf_pos_get_event() only contains
532 * headers, no event. Consider stream as inactive (live
533 * reading).
534 */
535 if (unlikely(pos->data_offset == pos->content_size))
536 return EAGAIN;
537
538 assert(pos->offset < pos->content_size);
539
540 /* Read event header */
541 if (likely(stream->stream_event_header)) {
542 struct definition_integer *integer_definition;
543 struct bt_definition *variant;
544
545 ret = generic_rw(ppos, &stream->stream_event_header->p);
546 if (unlikely(ret))
547 goto error;
548 /* lookup event id */
549 integer_definition = bt_lookup_integer(&stream->stream_event_header->p, "id", FALSE);
550 if (integer_definition) {
551 id = integer_definition->value._unsigned;
552 } else {
553 struct definition_enum *enum_definition;
554
555 enum_definition = bt_lookup_enum(&stream->stream_event_header->p, "id", FALSE);
556 if (enum_definition) {
557 id = enum_definition->integer->value._unsigned;
558 }
559 }
560
561 variant = bt_lookup_variant(&stream->stream_event_header->p, "v");
562 if (variant) {
563 integer_definition = bt_lookup_integer(variant, "id", FALSE);
564 if (integer_definition) {
565 id = integer_definition->value._unsigned;
566 }
567 }
568 stream->event_id = id;
569
570 /* lookup timestamp */
571 stream->has_timestamp = 0;
572 integer_definition = bt_lookup_integer(&stream->stream_event_header->p, "timestamp", FALSE);
573 if (integer_definition) {
574 ctf_update_timestamp(stream, integer_definition);
575 stream->has_timestamp = 1;
576 } else {
577 if (variant) {
578 integer_definition = bt_lookup_integer(variant, "timestamp", FALSE);
579 if (integer_definition) {
580 ctf_update_timestamp(stream, integer_definition);
581 stream->has_timestamp = 1;
582 }
583 }
584 }
585 }
586
587 /* Read stream-declared event context */
588 if (stream->stream_event_context) {
589 ret = generic_rw(ppos, &stream->stream_event_context->p);
590 if (ret)
591 goto error;
592 }
593
594 if (unlikely(id >= stream_class->events_by_id->len)) {
595 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
596 return -EINVAL;
597 }
598 event = g_ptr_array_index(stream->events_by_id, id);
599 if (unlikely(!event)) {
600 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
601 return -EINVAL;
602 }
603
604 /* Read event-declared event context */
605 if (event->event_context) {
606 ret = generic_rw(ppos, &event->event_context->p);
607 if (ret)
608 goto error;
609 }
610
611 /* Read event payload */
612 if (likely(event->event_fields)) {
613 ret = generic_rw(ppos, &event->event_fields->p);
614 if (ret)
615 goto error;
616 }
617
618 if (pos->last_offset == pos->offset) {
619 fprintf(stderr, "[error] Invalid 0 byte event encountered.\n");
620 return -EINVAL;
621 }
622
623 return 0;
624
625 error:
626 fprintf(stderr, "[error] Unexpected end of packet. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
627 return ret;
628 }
629
630 static
631 int ctf_write_event(struct bt_stream_pos *pos, struct ctf_stream_definition *stream)
632 {
633 struct ctf_stream_declaration *stream_class = stream->stream_class;
634 struct ctf_event_definition *event;
635 uint64_t id;
636 int ret;
637
638 id = stream->event_id;
639
640 /* print event header */
641 if (likely(stream->stream_event_header)) {
642 ret = generic_rw(pos, &stream->stream_event_header->p);
643 if (ret)
644 goto error;
645 }
646
647 /* print stream-declared event context */
648 if (stream->stream_event_context) {
649 ret = generic_rw(pos, &stream->stream_event_context->p);
650 if (ret)
651 goto error;
652 }
653
654 if (unlikely(id >= stream_class->events_by_id->len)) {
655 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
656 return -EINVAL;
657 }
658 event = g_ptr_array_index(stream->events_by_id, id);
659 if (unlikely(!event)) {
660 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
661 return -EINVAL;
662 }
663
664 /* print event-declared event context */
665 if (event->event_context) {
666 ret = generic_rw(pos, &event->event_context->p);
667 if (ret)
668 goto error;
669 }
670
671 /* Read and print event payload */
672 if (likely(event->event_fields)) {
673 ret = generic_rw(pos, &event->event_fields->p);
674 if (ret)
675 goto error;
676 }
677
678 return 0;
679
680 error:
681 fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
682 return ret;
683 }
684
685 /*
686 * One side-effect of this function is to unmap pos mmap base if one is
687 * mapped.
688 */
689 static
690 int find_data_offset(struct ctf_stream_pos *pos,
691 struct ctf_file_stream *file_stream,
692 struct packet_index *packet_index)
693 {
694 uint64_t packet_map_len = DEFAULT_HEADER_LEN, tmp_map_len;
695 struct stat filestats;
696 size_t filesize;
697 int ret;
698
699 pos = &file_stream->pos;
700
701 ret = fstat(pos->fd, &filestats);
702 if (ret < 0)
703 return ret;
704 filesize = filestats.st_size;
705
706 /* Deal with empty files */
707 if (!filesize) {
708 return 0;
709 }
710
711 begin:
712 if (filesize - pos->mmap_offset < (packet_map_len >> LOG2_CHAR_BIT)) {
713 packet_map_len = (filesize - pos->mmap_offset) << LOG2_CHAR_BIT;
714 }
715
716 if (pos->base_mma) {
717 /* unmap old base */
718 ret = munmap_align(pos->base_mma);
719 if (ret) {
720 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
721 strerror(errno));
722 return ret;
723 }
724 pos->base_mma = NULL;
725 }
726 /* map new base. Need mapping length from header. */
727 pos->base_mma = mmap_align(packet_map_len >> LOG2_CHAR_BIT, PROT_READ,
728 MAP_PRIVATE, pos->fd, pos->mmap_offset);
729 assert(pos->base_mma != MAP_FAILED);
730
731 pos->content_size = packet_map_len;
732 pos->packet_size = packet_map_len;
733 pos->offset = 0; /* Position of the packet header */
734
735 /* update trace_packet_header and stream_packet_context */
736 if (pos->prot == PROT_READ && file_stream->parent.trace_packet_header) {
737 /* Read packet header */
738 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
739 if (ret) {
740 if (ret == -EFAULT)
741 goto retry;
742 }
743 }
744 if (pos->prot == PROT_READ && file_stream->parent.stream_packet_context) {
745 /* Read packet context */
746 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
747 if (ret) {
748 if (ret == -EFAULT)
749 goto retry;
750 }
751 }
752 packet_index->data_offset = pos->offset;
753
754 /* unmap old base */
755 ret = munmap_align(pos->base_mma);
756 if (ret) {
757 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
758 strerror(errno));
759 return ret;
760 }
761 pos->base_mma = NULL;
762
763 return 0;
764
765 /* Retry with larger mapping */
766 retry:
767 if (packet_map_len == ((filesize - pos->mmap_offset) << LOG2_CHAR_BIT)) {
768 /*
769 * Reached EOF, but still expecting header/context data.
770 */
771 fprintf(stderr, "[error] Reached end of file, but still expecting header or context fields.\n");
772 return -EFAULT;
773 }
774 /* Double the mapping len, and retry */
775 tmp_map_len = packet_map_len << 1;
776 if (tmp_map_len >> 1 != packet_map_len) {
777 /* Overflow */
778 fprintf(stderr, "[error] Packet mapping length overflow\n");
779 return -EFAULT;
780 }
781 packet_map_len = tmp_map_len;
782 goto begin;
783 }
784
785
786 int ctf_init_pos(struct ctf_stream_pos *pos, struct bt_trace_descriptor *trace,
787 int fd, int open_flags)
788 {
789 pos->fd = fd;
790 if (fd >= 0) {
791 pos->packet_index = g_array_new(FALSE, TRUE,
792 sizeof(struct packet_index));
793 } else {
794 pos->packet_index = NULL;
795 }
796 switch (open_flags & O_ACCMODE) {
797 case O_RDONLY:
798 pos->prot = PROT_READ;
799 pos->flags = MAP_PRIVATE;
800 pos->parent.rw_table = read_dispatch_table;
801 pos->parent.event_cb = ctf_read_event;
802 pos->parent.trace = trace;
803 break;
804 case O_RDWR:
805 pos->prot = PROT_READ | PROT_WRITE;
806 pos->flags = MAP_SHARED;
807 pos->parent.rw_table = write_dispatch_table;
808 pos->parent.event_cb = ctf_write_event;
809 pos->parent.trace = trace;
810 if (fd >= 0)
811 ctf_packet_seek(&pos->parent, 0, SEEK_SET); /* position for write */
812 break;
813 default:
814 assert(0);
815 }
816 return 0;
817 }
818
819 int ctf_fini_pos(struct ctf_stream_pos *pos)
820 {
821 if ((pos->prot & PROT_WRITE) && pos->content_size_loc)
822 *pos->content_size_loc = pos->offset;
823 if (pos->base_mma) {
824 int ret;
825
826 /* unmap old base */
827 ret = munmap_align(pos->base_mma);
828 if (ret) {
829 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
830 strerror(errno));
831 return -1;
832 }
833 }
834 if (pos->packet_index)
835 (void) g_array_free(pos->packet_index, TRUE);
836 return 0;
837 }
838
839 void ctf_update_current_packet_index(struct ctf_stream_definition *stream,
840 struct packet_index *prev_index,
841 struct packet_index *cur_index)
842 {
843 uint64_t events_discarded_diff;
844 uint64_t packets_lost_diff = 0;
845
846 /* Update packet index time information */
847
848 /* Current packet begin/end */
849 stream->current.real.begin =
850 cur_index->ts_real.timestamp_begin;
851 stream->current.cycles.begin =
852 cur_index->ts_cycles.timestamp_begin;
853 stream->current.real.end =
854 cur_index->ts_real.timestamp_end;
855 stream->current.cycles.end =
856 cur_index->ts_cycles.timestamp_end;
857
858 /* Update packet index discarded event information */
859 events_discarded_diff = cur_index->events_discarded;
860 if (prev_index) {
861 /* Previous packet begin/end */
862 stream->prev.cycles.begin =
863 prev_index->ts_cycles.timestamp_begin;
864 stream->prev.real.begin =
865 prev_index->ts_real.timestamp_begin;
866 stream->prev.cycles.end =
867 prev_index->ts_cycles.timestamp_end;
868 stream->prev.real.end =
869 prev_index->ts_real.timestamp_end;
870
871 events_discarded_diff -= prev_index->events_discarded;
872 /* packet_seq_num stays at 0 if not produced by the tracer */
873 if (cur_index->packet_seq_num) {
874 packets_lost_diff = cur_index->packet_seq_num -
875 prev_index->packet_seq_num - 1;
876 }
877 /*
878 * Deal with 32-bit wrap-around if the tracer provided a
879 * 32-bit field.
880 */
881 if (prev_index->events_discarded_len == 32) {
882 events_discarded_diff = (uint32_t) events_discarded_diff;
883 }
884 } else {
885 /*
886 * First packet: use current packet info as limits for
887 * previous packet.
888 */
889 stream->prev.cycles.begin =
890 stream->prev.cycles.end =
891 stream->current.cycles.begin;
892 stream->prev.real.begin =
893 stream->prev.real.end =
894 stream->current.real.begin;
895 }
896 stream->events_discarded = events_discarded_diff;
897 stream->packets_lost = packets_lost_diff;
898 }
899
900 /*
901 * Find the timerange where all the streams in the trace are active
902 * simultaneously.
903 *
904 * Return 0 and update begin/end if necessary on success, return 1 for
905 * empty streams and return a negative value on error.
906 */
907 static
908 int ctf_find_stream_intersection(struct bt_trace_descriptor *td_read,
909 struct packet_index_time *_real,
910 struct packet_index_time *_cycles)
911 {
912 int stream_id, ret = 0;
913 struct packet_index_time real = { 0, UINT64_MAX },
914 cycles = { 0, UINT64_MAX };
915 struct ctf_trace *tin = container_of(td_read, struct ctf_trace, parent);
916
917 /* At least one of the two return args must be provided. */
918 if (!_real && !_cycles) {
919 ret = -1;
920 goto end;
921 }
922
923 if (tin->streams->len == 0) {
924 ret = 1;
925 goto end;
926 }
927
928 for (stream_id = 0; stream_id < tin->streams->len;
929 stream_id++) {
930 int filenr;
931 struct ctf_stream_declaration *stream_class;
932
933 stream_class = g_ptr_array_index(tin->streams, stream_id);
934 if (!stream_class) {
935 continue;
936 }
937 for (filenr = 0; filenr < stream_class->streams->len; filenr++) {
938 struct ctf_file_stream *file_stream;
939 struct ctf_stream_pos *stream_pos;
940 struct packet_index *index;
941
942 file_stream = g_ptr_array_index(stream_class->streams,
943 filenr);
944 if (!file_stream) {
945 continue;
946 }
947 stream_pos = &file_stream->pos;
948 if (!stream_pos->packet_index ||
949 stream_pos->packet_index->len <= 0) {
950 ret = 1;
951 goto end;
952 }
953 index = &g_array_index(stream_pos->packet_index,
954 struct packet_index, 0);
955 real.timestamp_begin = max(real.timestamp_begin,
956 index->ts_real.timestamp_begin);
957 cycles.timestamp_begin = max(cycles.timestamp_begin,
958 index->ts_cycles.timestamp_begin);
959
960 index = &g_array_index(stream_pos->packet_index,
961 struct packet_index,
962 stream_pos->packet_index->len - 1);
963 real.timestamp_end = min(real.timestamp_end,
964 index->ts_real.timestamp_end);
965 cycles.timestamp_end = min(cycles.timestamp_end,
966 index->ts_cycles.timestamp_end);
967 }
968 }
969 end:
970 if (ret == 0) {
971 if (_real) {
972 *_real = real;
973 }
974 if (_cycles) {
975 *_cycles = cycles;
976 }
977 }
978 return ret;
979 }
980
981 /*
982 * Find the union of all active regions in the trace collection's traces.
983 * Returns "real" timestamps.
984 *
985 * Return 0 on success.
986 * Return 1 if no intersections are found.
987 * Return a negative value on error.
988 */
989 int ctf_find_tc_stream_packet_intersection_union(struct bt_context *ctx,
990 uint64_t *_ts_begin, uint64_t *_ts_end)
991 {
992 int ret = 0, i;
993 uint64_t ts_begin = UINT64_MAX, ts_end = 0;
994
995 if (!ctx || !ctx->tc || !ctx->tc->array || !_ts_begin || !_ts_end) {
996 ret = -EINVAL;
997 goto end;
998 }
999
1000 for (i = 0; i < ctx->tc->array->len; i++) {
1001 struct bt_trace_descriptor *td_read;
1002 struct packet_index_time intersection_real;
1003
1004 td_read = g_ptr_array_index(ctx->tc->array, i);
1005 if (!td_read) {
1006 continue;
1007 }
1008 ret = ctf_find_stream_intersection(td_read, &intersection_real,
1009 NULL);
1010 if (ret == 1) {
1011 /* Empty trace or no stream intersection. */
1012 continue;
1013 } else if (ret < 0) {
1014 goto end;
1015 }
1016
1017 ts_begin = min(intersection_real.timestamp_begin, ts_begin);
1018 ts_end = max(intersection_real.timestamp_end, ts_end);
1019 }
1020
1021 if (ts_end < ts_begin) {
1022 ret = 1;
1023 goto end;
1024 }
1025 *_ts_begin = ts_begin;
1026 *_ts_end = ts_end;
1027 end:
1028 return ret;
1029 }
1030
1031 int ctf_tc_set_stream_intersection_mode(struct bt_context *ctx)
1032 {
1033 int ret = 0, i;
1034
1035 if (!ctx || !ctx->tc || !ctx->tc->array) {
1036 ret = -EINVAL;
1037 goto end;
1038 }
1039
1040 for (i = 0; i < ctx->tc->array->len; i++) {
1041 struct bt_trace_descriptor *td_read;
1042 struct packet_index_time intersection_real;
1043
1044 td_read = g_ptr_array_index(ctx->tc->array, i);
1045 if (!td_read) {
1046 continue;
1047 }
1048
1049 ret = ctf_find_stream_intersection(td_read, &intersection_real,
1050 NULL);
1051 if (ret == 1) {
1052 /* Empty trace or no stream intersection. */
1053 continue;
1054 } else if (ret < 0) {
1055 goto end;
1056 }
1057
1058 td_read->interval_real = intersection_real;
1059 td_read->interval_set = true;
1060 }
1061 end:
1062 return ret;
1063 }
1064
1065 /*
1066 * for SEEK_CUR: go to next packet.
1067 * for SEEK_SET: go to packet numer (index).
1068 */
1069 void ctf_packet_seek(struct bt_stream_pos *stream_pos, size_t index, int whence)
1070 {
1071 struct ctf_stream_pos *pos =
1072 container_of(stream_pos, struct ctf_stream_pos, parent);
1073 struct ctf_file_stream *file_stream =
1074 container_of(pos, struct ctf_file_stream, pos);
1075 int ret;
1076 struct packet_index *packet_index, *prev_index;
1077
1078 switch (whence) {
1079 case SEEK_CUR:
1080 case SEEK_SET: /* Fall-through */
1081 break; /* OK */
1082 default:
1083 ret = -BT_PACKET_SEEK_ERROR;
1084 goto end;
1085 }
1086
1087 if ((pos->prot & PROT_WRITE) && pos->content_size_loc)
1088 *pos->content_size_loc = pos->offset;
1089
1090 if (pos->base_mma) {
1091 /* unmap old base */
1092 ret = munmap_align(pos->base_mma);
1093 if (ret) {
1094 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1095 strerror(errno));
1096 ret = -BT_PACKET_SEEK_ERROR;
1097 goto end;
1098 }
1099 pos->base_mma = NULL;
1100 }
1101
1102 /*
1103 * The caller should never ask for ctf_move_pos across packets,
1104 * except to get exactly at the beginning of the next packet.
1105 */
1106 if (pos->prot & PROT_WRITE) {
1107 switch (whence) {
1108 case SEEK_CUR:
1109 /* The writer will add padding */
1110 pos->mmap_offset += pos->packet_size / CHAR_BIT;
1111 break;
1112 case SEEK_SET:
1113 assert(index == 0); /* only seek supported for now */
1114 pos->cur_index = 0;
1115 break;
1116 default:
1117 ret = -BT_PACKET_SEEK_ERROR;
1118 goto end;
1119 }
1120 pos->content_size = -1U; /* Unknown at this point */
1121 pos->packet_size = WRITE_PACKET_LEN;
1122 do {
1123 ret = bt_posix_fallocate(pos->fd, pos->mmap_offset,
1124 pos->packet_size / CHAR_BIT);
1125 } while (ret == EINTR);
1126 assert(ret == 0);
1127 pos->offset = 0;
1128 } else {
1129 uint64_t remaining_file_size;
1130 read_next_packet:
1131 switch (whence) {
1132 case SEEK_CUR:
1133 {
1134 if (pos->offset == EOF) {
1135 ret = 0;
1136 goto end;
1137 }
1138 assert(pos->cur_index < pos->packet_index->len);
1139 /* The reader will expect us to skip padding */
1140 ++pos->cur_index;
1141 break;
1142 }
1143 case SEEK_SET:
1144 if (index >= pos->packet_index->len) {
1145 pos->offset = EOF;
1146 ret = 0;
1147 goto end;
1148 }
1149 pos->cur_index = index;
1150 break;
1151 default:
1152 ret = -BT_PACKET_SEEK_ERROR;
1153 goto end;
1154 }
1155
1156 if (pos->cur_index >= pos->packet_index->len) {
1157 pos->offset = EOF;
1158 ret = 0;
1159 goto end;
1160 }
1161
1162 packet_index = &g_array_index(pos->packet_index,
1163 struct packet_index, pos->cur_index);
1164 if (pos->cur_index > 0) {
1165 prev_index = &g_array_index(pos->packet_index,
1166 struct packet_index,
1167 pos->cur_index - 1);
1168 } else {
1169 prev_index = NULL;
1170 }
1171 ctf_update_current_packet_index(&file_stream->parent,
1172 prev_index, packet_index);
1173
1174 if (pos->cur_index >= pos->packet_index->len) {
1175 pos->offset = EOF;
1176 ret = 0;
1177 goto end;
1178 }
1179
1180 /*
1181 * We need to check if we are in trace read or called
1182 * from packet indexing. In this last case, the
1183 * collection is not there, so we cannot print the
1184 * timestamps.
1185 */
1186 if ((&file_stream->parent)->stream_class->trace->parent.collection) {
1187 ctf_print_discarded_lost(stderr, &file_stream->parent);
1188 }
1189
1190 packet_index = &g_array_index(pos->packet_index,
1191 struct packet_index,
1192 pos->cur_index);
1193 file_stream->parent.cycles_timestamp = packet_index->ts_cycles.timestamp_begin;
1194
1195 file_stream->parent.real_timestamp = packet_index->ts_real.timestamp_begin;
1196
1197 /* Lookup context/packet size in index */
1198 if (packet_index->data_offset == -1) {
1199 ret = find_data_offset(pos, file_stream, packet_index);
1200 if (ret < 0) {
1201 ret = -BT_PACKET_SEEK_ERROR;
1202 goto end;
1203 }
1204 }
1205
1206 remaining_file_size = (pos->file_length - ((uint64_t) packet_index->offset)) * CHAR_BIT;
1207 if (packet_index->packet_size > remaining_file_size) {
1208 fflush(stdout);
1209 ctf_print_truncated_packet(stderr, &file_stream->parent,
1210 packet_index->packet_size,
1211 remaining_file_size);
1212 pos->offset = EOF;
1213 ret = -BT_PACKET_SEEK_ERROR_TRUNCATED_PACKET;
1214 goto end;
1215 }
1216
1217 pos->content_size = packet_index->content_size;
1218 pos->packet_size = packet_index->packet_size;
1219 pos->mmap_offset = packet_index->offset;
1220 pos->data_offset = packet_index->data_offset;
1221 if (pos->data_offset < packet_index->content_size) {
1222 pos->offset = 0; /* will read headers */
1223 } else if (pos->data_offset == packet_index->content_size) {
1224 /* empty packet */
1225 pos->offset = packet_index->data_offset;
1226 whence = SEEK_CUR;
1227 goto read_next_packet;
1228 } else {
1229 pos->offset = EOF;
1230 ret = 0;
1231 goto end;
1232 }
1233 }
1234 /* map new base. Need mapping length from header. */
1235 pos->base_mma = mmap_align(pos->packet_size / CHAR_BIT, pos->prot,
1236 pos->flags, pos->fd, pos->mmap_offset);
1237 if (pos->base_mma == MAP_FAILED) {
1238 fprintf(stderr, "[error] mmap error %s.\n",
1239 strerror(errno));
1240 assert(0);
1241 }
1242
1243 /* update trace_packet_header and stream_packet_context */
1244 if (!(pos->prot & PROT_WRITE) &&
1245 file_stream->parent.trace_packet_header) {
1246 /* Read packet header */
1247 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1248 assert(!ret);
1249 }
1250 if (!(pos->prot & PROT_WRITE) &&
1251 file_stream->parent.stream_packet_context) {
1252 /* Read packet context */
1253 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1254 assert(!ret);
1255 }
1256 ret = 0;
1257 end:
1258 bt_packet_seek_set_error(ret);
1259 }
1260
1261 static
1262 int packet_metadata(struct ctf_trace *td, FILE *fp)
1263 {
1264 uint32_t magic;
1265 size_t len;
1266 int ret = 0;
1267
1268 len = fread(&magic, sizeof(magic), 1, fp);
1269 if (len != 1) {
1270 goto end;
1271 }
1272 if (magic == TSDL_MAGIC) {
1273 ret = 1;
1274 td->byte_order = BYTE_ORDER;
1275 CTF_TRACE_SET_FIELD(td, byte_order);
1276 } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) {
1277 ret = 1;
1278 td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ?
1279 LITTLE_ENDIAN : BIG_ENDIAN;
1280 CTF_TRACE_SET_FIELD(td, byte_order);
1281 }
1282 end:
1283 rewind(fp);
1284 return ret;
1285 }
1286
1287 /*
1288 * Returns 0 on success, -1 on error.
1289 */
1290 static
1291 int check_version(unsigned int major, unsigned int minor)
1292 {
1293 switch (major) {
1294 case 1:
1295 switch (minor) {
1296 case 8:
1297 return 0;
1298 default:
1299 goto warning;
1300 }
1301 default:
1302 goto warning;
1303
1304 }
1305
1306 /* eventually return an error instead of warning */
1307 warning:
1308 fprintf(stderr, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n",
1309 major, minor);
1310 return 0;
1311 }
1312
1313 static
1314 int ctf_trace_metadata_packet_read(struct ctf_trace *td, FILE *in,
1315 FILE *out)
1316 {
1317 struct metadata_packet_header header;
1318 size_t readlen, writelen, toread;
1319 char buf[4096 + 1]; /* + 1 for debug-mode \0 */
1320 int ret = 0;
1321
1322 readlen = fread(&header, header_sizeof(header), 1, in);
1323 if (readlen < 1)
1324 return -EINVAL;
1325
1326 if (td->byte_order != BYTE_ORDER) {
1327 header.magic = GUINT32_SWAP_LE_BE(header.magic);
1328 header.checksum = GUINT32_SWAP_LE_BE(header.checksum);
1329 header.content_size = GUINT32_SWAP_LE_BE(header.content_size);
1330 header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size);
1331 }
1332 if (header.checksum)
1333 fprintf(stderr, "[warning] checksum verification not supported yet.\n");
1334 if (header.compression_scheme) {
1335 fprintf(stderr, "[error] compression (%u) not supported yet.\n",
1336 header.compression_scheme);
1337 return -EINVAL;
1338 }
1339 if (header.encryption_scheme) {
1340 fprintf(stderr, "[error] encryption (%u) not supported yet.\n",
1341 header.encryption_scheme);
1342 return -EINVAL;
1343 }
1344 if (header.checksum_scheme) {
1345 fprintf(stderr, "[error] checksum (%u) not supported yet.\n",
1346 header.checksum_scheme);
1347 return -EINVAL;
1348 }
1349 if (check_version(header.major, header.minor) < 0)
1350 return -EINVAL;
1351 if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) {
1352 memcpy(td->uuid, header.uuid, sizeof(header.uuid));
1353 CTF_TRACE_SET_FIELD(td, uuid);
1354 } else {
1355 if (bt_uuid_compare(header.uuid, td->uuid))
1356 return -EINVAL;
1357 }
1358
1359 if ((header.content_size / CHAR_BIT) < header_sizeof(header))
1360 return -EINVAL;
1361
1362 toread = (header.content_size / CHAR_BIT) - header_sizeof(header);
1363
1364 for (;;) {
1365 readlen = fread(buf, sizeof(char), min(sizeof(buf) - 1, toread), in);
1366 if (ferror(in)) {
1367 ret = -EINVAL;
1368 break;
1369 }
1370 if (babeltrace_debug) {
1371 buf[readlen] = '\0';
1372 fprintf(stderr, "[debug] metadata packet read: %s\n",
1373 buf);
1374 }
1375
1376 writelen = fwrite(buf, sizeof(char), readlen, out);
1377 if (writelen < readlen) {
1378 ret = -EIO;
1379 break;
1380 }
1381 if (ferror(out)) {
1382 ret = -EINVAL;
1383 break;
1384 }
1385 toread -= readlen;
1386 if (!toread) {
1387 ret = 0; /* continue reading next packet */
1388 goto read_padding;
1389 }
1390 }
1391 return ret;
1392
1393 read_padding:
1394 toread = (header.packet_size - header.content_size) / CHAR_BIT;
1395 ret = fseek(in, toread, SEEK_CUR);
1396 if (ret < 0) {
1397 fprintf(stderr, "[warning] Missing padding at end of file\n");
1398 ret = 0;
1399 }
1400 return ret;
1401 }
1402
1403 static
1404 int ctf_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
1405 char **buf)
1406 {
1407 FILE *in, *out;
1408 size_t size, buflen;
1409 int ret;
1410
1411 in = *fp;
1412 /*
1413 * Using strlen on *buf instead of size of open_memstream
1414 * because its size includes garbage at the end (after final
1415 * \0). This is the allocated size, not the actual string size.
1416 */
1417 out = babeltrace_open_memstream(buf, &size);
1418 if (out == NULL) {
1419 perror("Metadata open_memstream");
1420 return -errno;
1421 }
1422 for (;;) {
1423 ret = ctf_trace_metadata_packet_read(td, in, out);
1424 if (ret) {
1425 break;
1426 }
1427 if (feof(in)) {
1428 ret = 0;
1429 break;
1430 }
1431 }
1432 /* close to flush the buffer */
1433 ret = babeltrace_close_memstream(buf, &size, out);
1434 if (ret < 0) {
1435 int closeret;
1436
1437 perror("babeltrace_flush_memstream");
1438 ret = -errno;
1439 closeret = fclose(in);
1440 if (closeret) {
1441 perror("Error in fclose");
1442 }
1443 return ret;
1444 }
1445 ret = fclose(in);
1446 if (ret) {
1447 perror("Error in fclose");
1448 }
1449 /* open for reading */
1450 buflen = strlen(*buf);
1451 if (!buflen) {
1452 *fp = NULL;
1453 return -ENOENT;
1454 }
1455 *fp = babeltrace_fmemopen(*buf, buflen, "rb");
1456 if (!*fp) {
1457 perror("Metadata fmemopen");
1458 return -errno;
1459 }
1460 return 0;
1461 }
1462
1463 static
1464 int ctf_trace_metadata_read(struct ctf_trace *td, FILE *metadata_fp,
1465 struct ctf_scanner *scanner, int append)
1466 {
1467 struct ctf_file_stream *metadata_stream;
1468 FILE *fp;
1469 char *buf = NULL;
1470 int ret = 0, closeret;
1471
1472 metadata_stream = g_new0(struct ctf_file_stream, 1);
1473 metadata_stream->pos.last_offset = LAST_OFFSET_POISON;
1474
1475 if (metadata_fp) {
1476 fp = metadata_fp;
1477 metadata_stream->pos.fd = -1;
1478 } else {
1479 td->metadata = &metadata_stream->parent;
1480 metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
1481 if (metadata_stream->pos.fd < 0) {
1482 fprintf(stderr, "Unable to open metadata.\n");
1483 ret = -1;
1484 goto end_free;
1485 }
1486
1487 fp = fdopen(metadata_stream->pos.fd, "r");
1488 if (!fp) {
1489 fprintf(stderr, "[error] Unable to open metadata stream.\n");
1490 perror("Metadata stream open");
1491 ret = -errno;
1492 goto end_stream;
1493 }
1494 /* fd now belongs to fp */
1495 metadata_stream->pos.fd = -1;
1496 }
1497 if (babeltrace_debug)
1498 yydebug = 1;
1499
1500 if (packet_metadata(td, fp)) {
1501 ret = ctf_trace_metadata_stream_read(td, &fp, &buf);
1502 if (ret) {
1503 goto end;
1504 }
1505 td->metadata_string = buf;
1506 td->metadata_packetized = 1;
1507 } else {
1508 if (!append) {
1509 unsigned int major, minor;
1510 ssize_t nr_items;
1511
1512 td->byte_order = BYTE_ORDER;
1513
1514 /* Check text-only metadata header and version */
1515 nr_items = fscanf(fp, "/* CTF %10u.%10u", &major, &minor);
1516 if (nr_items < 2)
1517 fprintf(stderr, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
1518 if (check_version(major, minor) < 0) {
1519 ret = -EINVAL;
1520 goto end;
1521 }
1522 rewind(fp);
1523 }
1524 }
1525
1526 ret = ctf_scanner_append_ast(scanner, fp);
1527 if (ret) {
1528 fprintf(stderr, "[error] Error creating AST\n");
1529 goto end;
1530 }
1531
1532 if (babeltrace_debug) {
1533 ret = ctf_visitor_print_xml(stderr, 0, &scanner->ast->root);
1534 if (ret) {
1535 fprintf(stderr, "[error] Error visiting AST for XML output\n");
1536 goto end;
1537 }
1538 }
1539
1540 ret = ctf_visitor_semantic_check(stderr, 0, &scanner->ast->root);
1541 if (ret) {
1542 fprintf(stderr, "[error] Error in CTF semantic validation %d\n", ret);
1543 goto end;
1544 }
1545 ret = ctf_visitor_construct_metadata(stderr, 0, &scanner->ast->root,
1546 td, td->byte_order);
1547 if (ret) {
1548 fprintf(stderr, "[error] Error in CTF metadata constructor %d\n", ret);
1549 goto end;
1550 }
1551 end:
1552 if (fp) {
1553 closeret = fclose(fp);
1554 if (closeret) {
1555 perror("Error on fclose");
1556 }
1557 }
1558 end_stream:
1559 if (metadata_stream->pos.fd >= 0) {
1560 closeret = close(metadata_stream->pos.fd);
1561 if (closeret) {
1562 perror("Error on metadata stream fd close");
1563 }
1564 }
1565 end_free:
1566 if (ret)
1567 g_free(metadata_stream);
1568 return ret;
1569 }
1570
1571 static
1572 struct ctf_event_definition *create_event_definitions(struct ctf_trace *td,
1573 struct ctf_stream_definition *stream,
1574 struct ctf_event_declaration *event)
1575 {
1576 struct ctf_event_definition *stream_event = g_new0(struct ctf_event_definition, 1);
1577
1578 if (event->context_decl) {
1579 struct bt_definition *definition =
1580 event->context_decl->p.definition_new(&event->context_decl->p,
1581 stream->parent_def_scope, 0, 0, "event.context");
1582 if (!definition) {
1583 goto error;
1584 }
1585 stream_event->event_context = container_of(definition,
1586 struct definition_struct, p);
1587 stream->parent_def_scope = stream_event->event_context->p.scope;
1588 }
1589 if (event->fields_decl) {
1590 struct bt_definition *definition =
1591 event->fields_decl->p.definition_new(&event->fields_decl->p,
1592 stream->parent_def_scope, 0, 0, "event.fields");
1593 if (!definition) {
1594 goto error;
1595 }
1596 stream_event->event_fields = container_of(definition,
1597 struct definition_struct, p);
1598 stream->parent_def_scope = stream_event->event_fields->p.scope;
1599 }
1600 stream_event->stream = stream;
1601 return stream_event;
1602
1603 error:
1604 if (stream_event->event_fields)
1605 bt_definition_unref(&stream_event->event_fields->p);
1606 if (stream_event->event_context)
1607 bt_definition_unref(&stream_event->event_context->p);
1608 fprintf(stderr, "[error] Unable to create event definition for event \"%s\".\n",
1609 g_quark_to_string(event->name));
1610 return NULL;
1611 }
1612
1613 static
1614 int copy_event_declarations_stream_class_to_stream(struct ctf_trace *td,
1615 struct ctf_stream_declaration *stream_class,
1616 struct ctf_stream_definition *stream)
1617 {
1618 size_t def_size, class_size, i;
1619 int ret = 0;
1620
1621 def_size = stream->events_by_id->len;
1622 class_size = stream_class->events_by_id->len;
1623
1624 g_ptr_array_set_size(stream->events_by_id, class_size);
1625 for (i = def_size; i < class_size; i++) {
1626 struct ctf_event_declaration *event =
1627 g_ptr_array_index(stream_class->events_by_id, i);
1628 struct ctf_event_definition *stream_event;
1629
1630 if (!event)
1631 continue;
1632 stream_event = create_event_definitions(td, stream, event);
1633 if (!stream_event) {
1634 ret = -EINVAL;
1635 goto error;
1636 }
1637 g_ptr_array_index(stream->events_by_id, i) = stream_event;
1638 }
1639 error:
1640 return ret;
1641 }
1642
1643 static
1644 int create_stream_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1645 {
1646 struct ctf_stream_declaration *stream_class;
1647 int ret;
1648 int i;
1649
1650 if (stream->stream_definitions_created)
1651 return 0;
1652
1653 stream_class = stream->stream_class;
1654
1655 if (stream_class->packet_context_decl) {
1656 struct bt_definition *definition =
1657 stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p,
1658 stream->parent_def_scope, 0, 0, "stream.packet.context");
1659 if (!definition) {
1660 ret = -EINVAL;
1661 goto error;
1662 }
1663 stream->stream_packet_context = container_of(definition,
1664 struct definition_struct, p);
1665 stream->parent_def_scope = stream->stream_packet_context->p.scope;
1666 }
1667 if (stream_class->event_header_decl) {
1668 struct bt_definition *definition =
1669 stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p,
1670 stream->parent_def_scope, 0, 0, "stream.event.header");
1671 if (!definition) {
1672 ret = -EINVAL;
1673 goto error;
1674 }
1675 stream->stream_event_header =
1676 container_of(definition, struct definition_struct, p);
1677 stream->parent_def_scope = stream->stream_event_header->p.scope;
1678 }
1679 if (stream_class->event_context_decl) {
1680 struct bt_definition *definition =
1681 stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p,
1682 stream->parent_def_scope, 0, 0, "stream.event.context");
1683 if (!definition) {
1684 ret = -EINVAL;
1685 goto error;
1686 }
1687 stream->stream_event_context =
1688 container_of(definition, struct definition_struct, p);
1689 stream->parent_def_scope = stream->stream_event_context->p.scope;
1690 }
1691 stream->events_by_id = g_ptr_array_new();
1692 ret = copy_event_declarations_stream_class_to_stream(td,
1693 stream_class, stream);
1694 if (ret)
1695 goto error_event;
1696 return 0;
1697
1698 error_event:
1699 for (i = 0; i < stream->events_by_id->len; i++) {
1700 struct ctf_event_definition *stream_event = g_ptr_array_index(stream->events_by_id, i);
1701 if (stream_event)
1702 g_free(stream_event);
1703 }
1704 g_ptr_array_free(stream->events_by_id, TRUE);
1705 error:
1706 if (stream->stream_event_context)
1707 bt_definition_unref(&stream->stream_event_context->p);
1708 if (stream->stream_event_header)
1709 bt_definition_unref(&stream->stream_event_header->p);
1710 if (stream->stream_packet_context)
1711 bt_definition_unref(&stream->stream_packet_context->p);
1712 fprintf(stderr, "[error] Unable to create stream (%" PRIu64 ") definitions: %s\n",
1713 stream_class->stream_id, strerror(-ret));
1714 return ret;
1715 }
1716
1717 static
1718 int stream_assign_class(struct ctf_trace *td,
1719 struct ctf_file_stream *file_stream,
1720 uint64_t stream_id)
1721 {
1722 struct ctf_stream_declaration *stream;
1723 int ret;
1724
1725 file_stream->parent.stream_id = stream_id;
1726 if (stream_id >= td->streams->len) {
1727 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1728 return -EINVAL;
1729 }
1730 stream = g_ptr_array_index(td->streams, stream_id);
1731 if (!stream) {
1732 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1733 return -EINVAL;
1734 }
1735 file_stream->parent.stream_class = stream;
1736 ret = create_stream_definitions(td, &file_stream->parent);
1737 if (ret)
1738 return ret;
1739 return 0;
1740 }
1741
1742 static
1743 int create_stream_one_packet_index(struct ctf_stream_pos *pos,
1744 struct ctf_trace *td,
1745 struct ctf_file_stream *file_stream)
1746 {
1747 struct packet_index packet_index;
1748 uint64_t stream_id = 0;
1749 uint64_t packet_map_len = DEFAULT_HEADER_LEN, tmp_map_len;
1750 int first_packet = 0;
1751 int len_index;
1752 int ret;
1753
1754 begin:
1755 memset(&packet_index, 0, sizeof(packet_index));
1756 if (!pos->mmap_offset) {
1757 first_packet = 1;
1758 }
1759
1760 if (pos->file_length - pos->mmap_offset < (packet_map_len >> LOG2_CHAR_BIT)) {
1761 packet_map_len = (pos->file_length - pos->mmap_offset) << LOG2_CHAR_BIT;
1762 }
1763
1764 if (pos->base_mma) {
1765 /* unmap old base */
1766 ret = munmap_align(pos->base_mma);
1767 if (ret) {
1768 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1769 strerror(errno));
1770 return ret;
1771 }
1772 pos->base_mma = NULL;
1773 }
1774 /* map new base. Need mapping length from header. */
1775 pos->base_mma = mmap_align(packet_map_len >> LOG2_CHAR_BIT, PROT_READ,
1776 MAP_PRIVATE, pos->fd, pos->mmap_offset);
1777 assert(pos->base_mma != MAP_FAILED);
1778 /*
1779 * Use current mapping size as temporary content and packet
1780 * size.
1781 */
1782 pos->content_size = packet_map_len;
1783 pos->packet_size = packet_map_len;
1784 pos->offset = 0; /* Position of the packet header */
1785
1786 packet_index.offset = pos->mmap_offset;
1787
1788 /* read and check header, set stream id (and check) */
1789 if (file_stream->parent.trace_packet_header) {
1790 /* Read packet header */
1791 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1792 if (ret) {
1793 if (ret == -EFAULT)
1794 goto retry;
1795 fprintf(stderr, "[error] Unable to read packet header: %s\n", strerror(-ret));
1796 return ret;
1797 }
1798 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic"));
1799 if (len_index >= 0) {
1800 struct bt_definition *field;
1801 uint64_t magic;
1802
1803 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1804 magic = bt_get_unsigned_int(field);
1805 if (magic != CTF_MAGIC) {
1806 fprintf(stderr, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
1807 magic,
1808 file_stream->pos.packet_index->len,
1809 (ssize_t) pos->mmap_offset);
1810 return -EINVAL;
1811 }
1812 }
1813
1814 /* check uuid */
1815 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid"));
1816 if (len_index >= 0) {
1817 struct definition_array *defarray;
1818 struct bt_definition *field;
1819 uint64_t i;
1820 uint8_t uuidval[BABELTRACE_UUID_LEN];
1821
1822 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1823 assert(field->declaration->id == CTF_TYPE_ARRAY);
1824 defarray = container_of(field, struct definition_array, p);
1825 assert(bt_array_len(defarray) == BABELTRACE_UUID_LEN);
1826
1827 for (i = 0; i < BABELTRACE_UUID_LEN; i++) {
1828 struct bt_definition *elem;
1829
1830 elem = bt_array_index(defarray, i);
1831 uuidval[i] = bt_get_unsigned_int(elem);
1832 }
1833 ret = bt_uuid_compare(td->uuid, uuidval);
1834 if (ret) {
1835 fprintf(stderr, "[error] Unique Universal Identifiers do not match.\n");
1836 return -EINVAL;
1837 }
1838 }
1839
1840 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id"));
1841 if (len_index >= 0) {
1842 struct bt_definition *field;
1843
1844 field = bt_struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1845 stream_id = bt_get_unsigned_int(field);
1846 }
1847 }
1848
1849 if (!first_packet && file_stream->parent.stream_id != stream_id) {
1850 fprintf(stderr, "[error] Stream ID is changing within a stream: expecting %" PRIu64 ", but packet has %" PRIu64 "\n",
1851 stream_id,
1852 file_stream->parent.stream_id);
1853 return -EINVAL;
1854 }
1855 if (first_packet) {
1856 ret = stream_assign_class(td, file_stream, stream_id);
1857 if (ret)
1858 return ret;
1859 }
1860
1861 if (file_stream->parent.stream_packet_context) {
1862 /* Read packet context */
1863 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1864 if (ret) {
1865 if (ret == -EFAULT)
1866 goto retry;
1867 fprintf(stderr, "[error] Unable to read packet context: %s\n", strerror(-ret));
1868 return ret;
1869 }
1870 /* read packet size from header */
1871 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size"));
1872 if (len_index >= 0) {
1873 struct bt_definition *field;
1874
1875 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1876 packet_index.packet_size = bt_get_unsigned_int(field);
1877 } else {
1878 /* Use file size for packet size */
1879 packet_index.packet_size = pos->file_length * CHAR_BIT;
1880 }
1881
1882 /* read content size from header */
1883 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size"));
1884 if (len_index >= 0) {
1885 struct bt_definition *field;
1886
1887 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1888 packet_index.content_size = bt_get_unsigned_int(field);
1889 } else {
1890 /* Use packet size if non-zero, else file size */
1891 packet_index.content_size = packet_index.packet_size ? : pos->file_length * CHAR_BIT;
1892 }
1893
1894 /* read timestamp begin from header */
1895 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin"));
1896 if (len_index >= 0) {
1897 struct bt_definition *field;
1898
1899 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1900 packet_index.ts_cycles.timestamp_begin = bt_get_unsigned_int(field);
1901 if (file_stream->parent.stream_class->trace->parent.collection) {
1902 packet_index.ts_real.timestamp_begin =
1903 ctf_get_real_timestamp(
1904 &file_stream->parent,
1905 packet_index.ts_cycles.timestamp_begin);
1906 }
1907 }
1908
1909 /* read timestamp end from header */
1910 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end"));
1911 if (len_index >= 0) {
1912 struct bt_definition *field;
1913
1914 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1915 packet_index.ts_cycles.timestamp_end = bt_get_unsigned_int(field);
1916 if (file_stream->parent.stream_class->trace->parent.collection) {
1917 packet_index.ts_real.timestamp_end =
1918 ctf_get_real_timestamp(
1919 &file_stream->parent,
1920 packet_index.ts_cycles.timestamp_end);
1921 }
1922 }
1923
1924 /* read events discarded from header */
1925 len_index = bt_struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("events_discarded"));
1926 if (len_index >= 0) {
1927 struct bt_definition *field;
1928
1929 field = bt_struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1930 packet_index.events_discarded = bt_get_unsigned_int(field);
1931 packet_index.events_discarded_len = bt_get_int_len(field);
1932 }
1933
1934 /* read packet_seq_num from header */
1935 len_index = bt_struct_declaration_lookup_field_index(
1936 file_stream->parent.stream_packet_context->declaration,
1937 g_quark_from_static_string("packet_seq_num"));
1938 if (len_index >= 0) {
1939 struct bt_definition *field;
1940
1941 field = bt_struct_definition_get_field_from_index(
1942 file_stream->parent.stream_packet_context,
1943 len_index);
1944 packet_index.packet_seq_num = bt_get_unsigned_int(field);
1945 }
1946 } else {
1947 /* Use file size for packet size */
1948 packet_index.packet_size = pos->file_length * CHAR_BIT;
1949 /* Use packet size if non-zero, else file size */
1950 packet_index.content_size = packet_index.packet_size ? : pos->file_length * CHAR_BIT;
1951 }
1952
1953 /* Validate content size and packet size values */
1954 if (packet_index.content_size > packet_index.packet_size) {
1955 fprintf(stderr, "[error] Content size (%" PRIu64 " bits) is larger than packet size (%" PRIu64 " bits).\n",
1956 packet_index.content_size, packet_index.packet_size);
1957 return -EINVAL;
1958 }
1959
1960 if (packet_index.content_size < pos->offset) {
1961 fprintf(stderr, "[error] Invalid CTF stream: content size is smaller than packet headers.\n");
1962 return -EINVAL;
1963 }
1964
1965 if ((packet_index.packet_size >> LOG2_CHAR_BIT) == 0) {
1966 fprintf(stderr, "[error] Invalid CTF stream: packet size needs to be at least one byte\n");
1967 return -EINVAL;
1968 }
1969
1970 /* Save position after header and context */
1971 packet_index.data_offset = pos->offset;
1972
1973 /* add index to packet array */
1974 g_array_append_val(file_stream->pos.packet_index, packet_index);
1975
1976 pos->mmap_offset += packet_index.packet_size >> LOG2_CHAR_BIT;
1977
1978 return 0;
1979
1980 /* Retry with larger mapping */
1981 retry:
1982 if (packet_map_len == ((pos->file_length - pos->mmap_offset) << LOG2_CHAR_BIT)) {
1983 /*
1984 * Reached EOF, but still expecting header/context data.
1985 */
1986 fprintf(stderr, "[error] Reached end of file, but still expecting header or context fields.\n");
1987 return -EFAULT;
1988 }
1989 /* Double the mapping len, and retry */
1990 tmp_map_len = packet_map_len << 1;
1991 if (tmp_map_len >> 1 != packet_map_len) {
1992 /* Overflow */
1993 fprintf(stderr, "[error] Packet mapping length overflow\n");
1994 return -EFAULT;
1995 }
1996 packet_map_len = tmp_map_len;
1997 goto begin;
1998 }
1999
2000 static
2001 int create_stream_packet_index(struct ctf_trace *td,
2002 struct ctf_file_stream *file_stream)
2003 {
2004 struct ctf_stream_pos *pos;
2005 int ret;
2006
2007 pos = &file_stream->pos;
2008
2009 /* Deal with empty files */
2010 if (!pos->file_length) {
2011 if (file_stream->parent.trace_packet_header
2012 || file_stream->parent.stream_packet_context) {
2013 /*
2014 * We expect a trace packet header and/or stream packet
2015 * context. Since a trace needs to have at least one
2016 * packet, empty files are therefore not accepted.
2017 */
2018 fprintf(stderr, "[error] Encountered an empty file, but expecting a trace packet header.\n");
2019 return -EINVAL;
2020 } else {
2021 /*
2022 * Without trace packet header nor stream packet
2023 * context, a one-packet trace can indeed be empty. This
2024 * is only valid if there is only one stream class: 0.
2025 */
2026 ret = stream_assign_class(td, file_stream, 0);
2027 if (ret)
2028 return ret;
2029 return 0;
2030 }
2031 }
2032
2033 for (pos->mmap_offset = 0; pos->mmap_offset < pos->file_length; ) {
2034 ret = create_stream_one_packet_index(pos, td, file_stream);
2035 if (ret)
2036 return ret;
2037 }
2038 return 0;
2039 }
2040
2041 static
2042 int create_trace_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
2043 {
2044 int ret;
2045
2046 if (td->packet_header_decl) {
2047 struct bt_definition *definition =
2048 td->packet_header_decl->p.definition_new(&td->packet_header_decl->p,
2049 stream->parent_def_scope, 0, 0, "trace.packet.header");
2050 if (!definition) {
2051 ret = -EINVAL;
2052 goto error;
2053 }
2054 stream->trace_packet_header =
2055 container_of(definition, struct definition_struct, p);
2056 stream->parent_def_scope = stream->trace_packet_header->p.scope;
2057 }
2058
2059 return 0;
2060
2061 error:
2062 fprintf(stderr, "[error] Unable to create trace definitions: %s\n", strerror(-ret));
2063 return ret;
2064 }
2065
2066 static
2067 int import_stream_packet_index(struct ctf_trace *td,
2068 struct ctf_file_stream *file_stream)
2069 {
2070 struct ctf_stream_pos *pos;
2071 struct ctf_packet_index *ctf_index = NULL;
2072 struct ctf_packet_index_file_hdr index_hdr;
2073 struct packet_index index;
2074 uint32_t packet_index_len, index_minor;
2075 int ret = 0;
2076 int first_packet = 1;
2077 size_t len;
2078
2079 pos = &file_stream->pos;
2080
2081 len = fread(&index_hdr, sizeof(index_hdr), 1, pos->index_fp);
2082 if (len != 1) {
2083 perror("read index file header");
2084 goto error;
2085 }
2086
2087 /* Check the index header */
2088 if (be32toh(index_hdr.magic) != CTF_INDEX_MAGIC) {
2089 fprintf(stderr, "[error] wrong index magic\n");
2090 ret = -1;
2091 goto error;
2092 }
2093 if (be32toh(index_hdr.index_major) != CTF_INDEX_MAJOR) {
2094 fprintf(stderr, "[error] Incompatible index file %" PRIu32
2095 ".%" PRIu32 ", supported %d.%d\n",
2096 be32toh(index_hdr.index_major),
2097 be32toh(index_hdr.index_minor), CTF_INDEX_MAJOR,
2098 CTF_INDEX_MINOR);
2099 ret = -1;
2100 goto error;
2101 }
2102 index_minor = be32toh(index_hdr.index_minor);
2103
2104 packet_index_len = be32toh(index_hdr.packet_index_len);
2105 if (packet_index_len == 0) {
2106 fprintf(stderr, "[error] Packet index length cannot be 0.\n");
2107 ret = -1;
2108 goto error;
2109 }
2110 /*
2111 * Allocate the index length found in header, not internal
2112 * representation.
2113 */
2114 ctf_index = g_malloc0(packet_index_len);
2115 while (fread(ctf_index, packet_index_len, 1,
2116 pos->index_fp) == 1) {
2117 uint64_t stream_id;
2118 struct ctf_stream_declaration *stream = NULL;
2119
2120 memset(&index, 0, sizeof(index));
2121 index.offset = be64toh(ctf_index->offset);
2122 index.packet_size = be64toh(ctf_index->packet_size);
2123 index.content_size = be64toh(ctf_index->content_size);
2124 index.ts_cycles.timestamp_begin = be64toh(ctf_index->timestamp_begin);
2125 index.ts_cycles.timestamp_end = be64toh(ctf_index->timestamp_end);
2126 index.events_discarded = be64toh(ctf_index->events_discarded);
2127 index.events_discarded_len = 64;
2128 index.data_offset = -1;
2129 stream_id = be64toh(ctf_index->stream_id);
2130 if (index_minor >= 1) {
2131 index.stream_instance_id = be64toh(ctf_index->stream_instance_id);
2132 index.packet_seq_num = be64toh(ctf_index->packet_seq_num);
2133 }
2134
2135 if (!first_packet) {
2136 /* add index to packet array */
2137 g_array_append_val(file_stream->pos.packet_index, index);
2138 continue;
2139 }
2140
2141 file_stream->parent.stream_id = stream_id;
2142 if (stream_id < td->streams->len) {
2143 stream = g_ptr_array_index(td->streams, stream_id);
2144 }
2145 if (!stream) {
2146 fprintf(stderr, "[error] Stream %" PRIu64
2147 " is not declared in metadata.\n",
2148 stream_id);
2149 ret = -EINVAL;
2150 goto error;
2151 }
2152 file_stream->parent.stream_class = stream;
2153 ret = create_stream_definitions(td, &file_stream->parent);
2154 if (ret)
2155 goto error;
2156 first_packet = 0;
2157 /* add index to packet array */
2158 g_array_append_val(file_stream->pos.packet_index, index);
2159 }
2160
2161 /* Index containing only the header. */
2162 if (!file_stream->parent.stream_class) {
2163 ret = -1;
2164 goto error;
2165 }
2166
2167 ret = 0;
2168
2169 error:
2170 g_free(ctf_index);
2171 return ret;
2172 }
2173
2174 /*
2175 * Note: many file streams can inherit from the same stream class
2176 * description (metadata).
2177 */
2178 static
2179 int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
2180 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2181 int whence))
2182 {
2183 int ret, fd, closeret;
2184 struct ctf_file_stream *file_stream;
2185 struct stat statbuf;
2186 char *index_name;
2187
2188 fd = openat(td->dirfd, path, flags);
2189 if (fd < 0) {
2190 perror("File stream openat()");
2191 ret = fd;
2192 goto error;
2193 }
2194
2195 /* Don't try to mmap subdirectories. Skip them, return success. */
2196 ret = fstat(fd, &statbuf);
2197 if (ret) {
2198 perror("File stream fstat()");
2199 goto fstat_error;
2200 }
2201 if (S_ISDIR(statbuf.st_mode)) {
2202 if (strncmp(path, "index", 5) != 0) {
2203 fprintf(stderr, "[warning] Skipping directory '%s' "
2204 "found in trace\n", path);
2205 }
2206 ret = 0;
2207 goto fd_is_dir_ok;
2208 }
2209 if (!statbuf.st_size) {
2210 /** Skip empty files. */
2211 ret = 0;
2212 goto fd_is_empty_file;
2213 }
2214
2215 file_stream = g_new0(struct ctf_file_stream, 1);
2216 file_stream->pos.last_offset = LAST_OFFSET_POISON;
2217 file_stream->pos.fd = -1;
2218 file_stream->pos.index_fp = NULL;
2219 file_stream->pos.file_length = statbuf.st_size;
2220
2221 strncpy(file_stream->parent.path, path, PATH_MAX);
2222 file_stream->parent.path[PATH_MAX - 1] = '\0';
2223
2224 if (packet_seek) {
2225 file_stream->pos.packet_seek = packet_seek;
2226 } else {
2227 fprintf(stderr, "[error] packet_seek function undefined.\n");
2228 ret = -1;
2229 goto error_def;
2230 }
2231
2232 ret = ctf_init_pos(&file_stream->pos, &td->parent, fd, flags);
2233 if (ret)
2234 goto error_def;
2235 ret = create_trace_definitions(td, &file_stream->parent);
2236 if (ret)
2237 goto error_def;
2238 /*
2239 * For now, only a single clock per trace is supported.
2240 */
2241 file_stream->parent.current_clock = td->parent.single_clock;
2242
2243 /*
2244 * Allocate the index name for this stream and try to open it.
2245 */
2246 index_name = malloc((strlen(path) + sizeof(INDEX_PATH)) * sizeof(char));
2247 if (!index_name) {
2248 fprintf(stderr, "[error] Cannot allocate index filename\n");
2249 ret = -ENOMEM;
2250 goto error_def;
2251 }
2252 snprintf(index_name, strlen(path) + sizeof(INDEX_PATH),
2253 INDEX_PATH, path);
2254
2255 if (bt_faccessat(td->dirfd, td->parent.path, index_name, O_RDONLY, 0) < 0) {
2256 ret = create_stream_packet_index(td, file_stream);
2257 if (ret) {
2258 fprintf(stderr, "[error] Stream index creation error.\n");
2259 goto error_index;
2260 }
2261 } else {
2262 ret = openat(td->dirfd, index_name, flags);
2263 if (ret < 0) {
2264 perror("Index file openat()");
2265 ret = -1;
2266 goto error_free;
2267 }
2268 file_stream->pos.index_fp = fdopen(ret, "r");
2269 if (!file_stream->pos.index_fp) {
2270 perror("fdopen() error");
2271 goto error_free;
2272 }
2273 ret = import_stream_packet_index(td, file_stream);
2274 if (ret) {
2275 ret = -1;
2276 goto error_index;
2277 }
2278 ret = fclose(file_stream->pos.index_fp);
2279 if (ret < 0) {
2280 perror("close index");
2281 goto error_free;
2282 }
2283 }
2284 free(index_name);
2285
2286 /* Add stream file to stream class */
2287 g_ptr_array_add(file_stream->parent.stream_class->streams,
2288 &file_stream->parent);
2289 return 0;
2290
2291 error_index:
2292 if (file_stream->pos.index_fp) {
2293 ret = fclose(file_stream->pos.index_fp);
2294 if (ret < 0) {
2295 perror("close index");
2296 }
2297 }
2298 if (file_stream->parent.trace_packet_header)
2299 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
2300 error_free:
2301 free(index_name);
2302 error_def:
2303 closeret = ctf_fini_pos(&file_stream->pos);
2304 if (closeret) {
2305 fprintf(stderr, "Error on ctf_fini_pos\n");
2306 }
2307 g_free(file_stream);
2308 fd_is_empty_file:
2309 fd_is_dir_ok:
2310 fstat_error:
2311 closeret = close(fd);
2312 if (closeret) {
2313 perror("Error on fd close");
2314 }
2315 error:
2316 return ret;
2317 }
2318
2319 static
2320 int ctf_open_trace_read(struct ctf_trace *td,
2321 const char *path, int flags,
2322 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2323 int whence), FILE *metadata_fp)
2324 {
2325 struct ctf_scanner *scanner;
2326 int ret, closeret;
2327 struct dirent *dirent;
2328 struct dirent *diriter;
2329 size_t dirent_len;
2330 char *ext;
2331
2332 td->flags = flags;
2333
2334 /* Open trace directory */
2335 td->dir = opendir(path);
2336 if (!td->dir) {
2337 fprintf(stderr, "[error] Unable to open trace directory \"%s\".\n", path);
2338 ret = -ENOENT;
2339 goto error;
2340 }
2341
2342 td->dirfd = open(path, 0);
2343 if (td->dirfd < 0) {
2344 fprintf(stderr, "[error] Unable to open trace directory file descriptor for path \"%s\".\n", path);
2345 perror("Trace directory open");
2346 ret = -errno;
2347 goto error_dirfd;
2348 }
2349 strncpy(td->parent.path, path, sizeof(td->parent.path));
2350 td->parent.path[sizeof(td->parent.path) - 1] = '\0';
2351
2352 /*
2353 * Keep the metadata file separate.
2354 * Keep scanner object local to the open. We don't support
2355 * incremental metadata append for on-disk traces.
2356 */
2357 scanner = ctf_scanner_alloc();
2358 if (!scanner) {
2359 fprintf(stderr, "[error] Error allocating scanner\n");
2360 ret = -ENOMEM;
2361 goto error_metadata;
2362 }
2363 ret = ctf_trace_metadata_read(td, metadata_fp, scanner, 0);
2364 ctf_scanner_free(scanner);
2365 if (ret) {
2366 if (ret == -ENOENT) {
2367 fprintf(stderr, "[warning] Empty metadata.\n");
2368 }
2369 fprintf(stderr, "[warning] Unable to open trace metadata for path \"%s\".\n", path);
2370 goto error_metadata;
2371 }
2372
2373 /*
2374 * Open each stream: for each file, try to open, check magic
2375 * number, and get the stream ID to add to the right location in
2376 * the stream array.
2377 */
2378
2379 dirent_len = offsetof(struct dirent, d_name) +
2380 fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
2381
2382 dirent = malloc(dirent_len);
2383
2384 for (;;) {
2385 ret = readdir_r(td->dir, dirent, &diriter);
2386 if (ret) {
2387 fprintf(stderr, "[error] Readdir error.\n");
2388 goto readdir_error;
2389 }
2390 if (!diriter)
2391 break;
2392 /* Ignore hidden files, ., .. and metadata. */
2393 if (!strncmp(diriter->d_name, ".", 1)
2394 || !strcmp(diriter->d_name, "..")
2395 || !strcmp(diriter->d_name, "metadata"))
2396 continue;
2397
2398 /* Ignore index files : *.idx */
2399 ext = strrchr(diriter->d_name, '.');
2400 if (ext && (!strcmp(ext, ".idx"))) {
2401 continue;
2402 }
2403
2404 ret = ctf_open_file_stream_read(td, diriter->d_name,
2405 flags, packet_seek);
2406 if (ret) {
2407 fprintf(stderr, "[error] Open file stream error.\n");
2408 goto readdir_error;
2409 }
2410 }
2411
2412 free(dirent);
2413 return 0;
2414
2415 readdir_error:
2416 free(dirent);
2417 error_metadata:
2418 closeret = close(td->dirfd);
2419 if (closeret) {
2420 perror("Error on fd close");
2421 }
2422 error_dirfd:
2423 closeret = closedir(td->dir);
2424 if (closeret) {
2425 perror("Error on closedir");
2426 }
2427 error:
2428 return ret;
2429 }
2430
2431 /*
2432 * ctf_open_trace: Open a CTF trace and index it.
2433 * Note that the user must seek the trace after the open (using the iterator)
2434 * since the index creation read it entirely.
2435 */
2436 static
2437 struct bt_trace_descriptor *ctf_open_trace(const char *path, int flags,
2438 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2439 int whence), FILE *metadata_fp)
2440 {
2441 struct ctf_trace *td;
2442 int ret;
2443
2444 /*
2445 * If packet_seek is NULL, we provide our default version.
2446 */
2447 if (!packet_seek)
2448 packet_seek = ctf_packet_seek;
2449
2450 td = g_new0(struct ctf_trace, 1);
2451 if (!td) {
2452 goto error;
2453 }
2454 init_trace_descriptor(&td->parent);
2455
2456 switch (flags & O_ACCMODE) {
2457 case O_RDONLY:
2458 if (!path) {
2459 fprintf(stderr, "[error] Path missing for input CTF trace.\n");
2460 goto error;
2461 }
2462 ret = ctf_open_trace_read(td, path, flags, packet_seek, metadata_fp);
2463 if (ret)
2464 goto error;
2465 break;
2466 case O_RDWR:
2467 fprintf(stderr, "[error] Opening CTF traces for output is not supported yet.\n");
2468 goto error;
2469 default:
2470 fprintf(stderr, "[error] Incorrect open flags.\n");
2471 goto error;
2472 }
2473
2474 ret = trace_debug_info_create(td);
2475 if (ret) {
2476 goto error;
2477 }
2478
2479 return &td->parent;
2480 error:
2481 if (td) {
2482 trace_debug_info_destroy(td);
2483 g_free(td);
2484 }
2485 return NULL;
2486 }
2487
2488 static
2489 void ctf_init_mmap_pos(struct ctf_stream_pos *pos,
2490 struct bt_mmap_stream *mmap_info)
2491 {
2492 pos->mmap_offset = 0;
2493 pos->packet_size = 0;
2494 pos->content_size = 0;
2495 pos->content_size_loc = NULL;
2496 pos->fd = mmap_info->fd;
2497 pos->base_mma = NULL;
2498 pos->offset = 0;
2499 pos->dummy = false;
2500 pos->cur_index = 0;
2501 pos->prot = PROT_READ;
2502 pos->flags = MAP_PRIVATE;
2503 pos->parent.rw_table = read_dispatch_table;
2504 pos->parent.event_cb = ctf_read_event;
2505 pos->priv = mmap_info->priv;
2506 pos->packet_index = g_array_new(FALSE, TRUE,
2507 sizeof(struct packet_index));
2508 }
2509
2510 static
2511 int prepare_mmap_stream_definition(struct ctf_trace *td,
2512 struct ctf_file_stream *file_stream,
2513 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2514 int whence))
2515 {
2516 struct ctf_stream_declaration *stream;
2517 uint64_t stream_id;
2518 int ret;
2519
2520 /* Ask for the first packet to get the stream_id. */
2521 packet_seek(&file_stream->pos.parent, 0, SEEK_SET);
2522 ret = bt_packet_seek_get_error();
2523 if (ret) {
2524 goto end;
2525 }
2526 stream_id = file_stream->parent.stream_id;
2527 if (stream_id >= td->streams->len) {
2528 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
2529 "in metadata.\n", stream_id);
2530 ret = -EINVAL;
2531 goto end;
2532 }
2533 stream = g_ptr_array_index(td->streams, stream_id);
2534 if (!stream) {
2535 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
2536 "in metadata.\n", stream_id);
2537 ret = -EINVAL;
2538 goto end;
2539 }
2540 file_stream->parent.stream_class = stream;
2541 ret = create_stream_definitions(td, &file_stream->parent);
2542 end:
2543 return ret;
2544 }
2545
2546 static
2547 int ctf_open_mmap_stream_read(struct ctf_trace *td,
2548 struct bt_mmap_stream *mmap_info,
2549 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2550 int whence))
2551 {
2552 int ret;
2553 struct ctf_file_stream *file_stream;
2554
2555 file_stream = g_new0(struct ctf_file_stream, 1);
2556 file_stream->parent.stream_id = -1ULL;
2557 file_stream->pos.last_offset = LAST_OFFSET_POISON;
2558 ctf_init_mmap_pos(&file_stream->pos, mmap_info);
2559
2560 file_stream->pos.packet_seek = packet_seek;
2561
2562 ret = create_trace_definitions(td, &file_stream->parent);
2563 if (ret) {
2564 goto error_def;
2565 }
2566
2567 ret = prepare_mmap_stream_definition(td, file_stream, packet_seek);
2568 if (ret)
2569 goto error_index;
2570
2571 /*
2572 * For now, only a single clock per trace is supported.
2573 */
2574 file_stream->parent.current_clock = td->parent.single_clock;
2575
2576 /* Add stream file to stream class */
2577 g_ptr_array_add(file_stream->parent.stream_class->streams,
2578 &file_stream->parent);
2579 return 0;
2580
2581 error_index:
2582 if (file_stream->parent.trace_packet_header)
2583 bt_definition_unref(&file_stream->parent.trace_packet_header->p);
2584 error_def:
2585 g_free(file_stream);
2586 return ret;
2587 }
2588
2589 static
2590 int ctf_open_mmap_trace_read(struct ctf_trace *td,
2591 struct bt_mmap_stream_list *mmap_list,
2592 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2593 int whence),
2594 FILE *metadata_fp)
2595 {
2596 int ret;
2597 struct bt_mmap_stream *mmap_info;
2598
2599 td->scanner = ctf_scanner_alloc();
2600 if (!td->scanner) {
2601 fprintf(stderr, "[error] Error allocating scanner\n");
2602 ret = -ENOMEM;
2603 goto error;
2604 }
2605 ret = ctf_trace_metadata_read(td, metadata_fp, td->scanner, 0);
2606 if (ret) {
2607 if (ret == -ENOENT) {
2608 fprintf(stderr, "[warning] Empty metadata.\n");
2609 }
2610 goto error;
2611 }
2612
2613 /*
2614 * for each stream, try to open, check magic number, and get the
2615 * stream ID to add to the right location in the stream array.
2616 */
2617 bt_list_for_each_entry(mmap_info, &mmap_list->head, list) {
2618 ret = ctf_open_mmap_stream_read(td, mmap_info, packet_seek);
2619 if (ret) {
2620 fprintf(stderr, "[error] Open file mmap stream error.\n");
2621 goto error;
2622 }
2623 }
2624 return 0;
2625
2626 error:
2627 ctf_scanner_free(td->scanner);
2628 return ret;
2629 }
2630
2631 static
2632 struct bt_trace_descriptor *ctf_open_mmap_trace(
2633 struct bt_mmap_stream_list *mmap_list,
2634 void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
2635 int whence),
2636 FILE *metadata_fp)
2637 {
2638 struct ctf_trace *td;
2639 int ret;
2640
2641 if (!metadata_fp) {
2642 fprintf(stderr, "[error] No metadata file pointer associated, "
2643 "required for mmap parsing\n");
2644 goto error;
2645 }
2646 if (!packet_seek) {
2647 fprintf(stderr, "[error] packet_seek function undefined.\n");
2648 goto error;
2649 }
2650 td = g_new0(struct ctf_trace, 1);
2651 td->dirfd = -1;
2652 ret = ctf_open_mmap_trace_read(td, mmap_list, packet_seek, metadata_fp);
2653 if (ret)
2654 goto error_free;
2655
2656 ret = trace_debug_info_create(td);
2657 if (ret) {
2658 goto error_free;
2659 }
2660
2661 return &td->parent;
2662
2663 error_free:
2664 g_free(td);
2665 error:
2666 return NULL;
2667 }
2668
2669 int ctf_append_trace_metadata(struct bt_trace_descriptor *tdp,
2670 FILE *metadata_fp)
2671 {
2672 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2673 int i, j;
2674 int ret;
2675
2676 if (!td->scanner)
2677 return -EINVAL;
2678 ret = ctf_trace_metadata_read(td, metadata_fp, td->scanner, 1);
2679 if (ret)
2680 return ret;
2681 /* for each stream_class */
2682 for (i = 0; i < td->streams->len; i++) {
2683 struct ctf_stream_declaration *stream_class;
2684
2685 stream_class = g_ptr_array_index(td->streams, i);
2686 if (!stream_class)
2687 continue;
2688 /* for each stream */
2689 for (j = 0; j < stream_class->streams->len; j++) {
2690 struct ctf_stream_definition *stream;
2691
2692 stream = g_ptr_array_index(stream_class->streams, j);
2693 if (!stream)
2694 continue;
2695 ret = copy_event_declarations_stream_class_to_stream(td,
2696 stream_class, stream);
2697 if (ret)
2698 return ret;
2699 }
2700 }
2701 return 0;
2702 }
2703
2704 static
2705 int ctf_convert_index_timestamp(struct bt_trace_descriptor *tdp)
2706 {
2707 int i, j, k;
2708 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2709
2710 /* for each stream_class */
2711 for (i = 0; i < td->streams->len; i++) {
2712 struct ctf_stream_declaration *stream_class;
2713
2714 stream_class = g_ptr_array_index(td->streams, i);
2715 if (!stream_class)
2716 continue;
2717 /* for each file_stream */
2718 for (j = 0; j < stream_class->streams->len; j++) {
2719 struct ctf_stream_definition *stream;
2720 struct ctf_stream_pos *stream_pos;
2721 struct ctf_file_stream *cfs;
2722
2723 stream = g_ptr_array_index(stream_class->streams, j);
2724 if (!stream)
2725 continue;
2726 cfs = container_of(stream, struct ctf_file_stream,
2727 parent);
2728 stream_pos = &cfs->pos;
2729 if (!stream_pos->packet_index)
2730 continue;
2731
2732 for (k = 0; k < stream_pos->packet_index->len; k++) {
2733 struct packet_index *index;
2734
2735 index = &g_array_index(stream_pos->packet_index,
2736 struct packet_index, k);
2737 index->ts_real.timestamp_begin =
2738 ctf_get_real_timestamp(stream,
2739 index->ts_cycles.timestamp_begin);
2740 index->ts_real.timestamp_end =
2741 ctf_get_real_timestamp(stream,
2742 index->ts_cycles.timestamp_end);
2743 }
2744 }
2745 }
2746 return 0;
2747 }
2748
2749 static
2750 int ctf_close_file_stream(struct ctf_file_stream *file_stream)
2751 {
2752 int ret;
2753
2754 ret = ctf_fini_pos(&file_stream->pos);
2755 if (ret) {
2756 fprintf(stderr, "Error on ctf_fini_pos\n");
2757 return -1;
2758 }
2759 if (file_stream->pos.fd >= 0) {
2760 ret = close(file_stream->pos.fd);
2761 if (ret) {
2762 perror("Error closing file fd");
2763 return -1;
2764 }
2765 }
2766 return 0;
2767 }
2768
2769 static
2770 int ctf_close_trace(struct bt_trace_descriptor *tdp)
2771 {
2772 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
2773 int ret;
2774
2775 if (td->streams) {
2776 int i;
2777
2778 for (i = 0; i < td->streams->len; i++) {
2779 struct ctf_stream_declaration *stream;
2780 int j;
2781
2782 stream = g_ptr_array_index(td->streams, i);
2783 if (!stream)
2784 continue;
2785 for (j = 0; j < stream->streams->len; j++) {
2786 struct ctf_file_stream *file_stream;
2787 file_stream = container_of(g_ptr_array_index(stream->streams, j),
2788 struct ctf_file_stream, parent);
2789 ret = ctf_close_file_stream(file_stream);
2790 if (ret)
2791 return ret;
2792 }
2793 }
2794 }
2795 ctf_destroy_metadata(td);
2796 ctf_scanner_free(td->scanner);
2797 if (td->dirfd >= 0) {
2798 ret = close(td->dirfd);
2799 if (ret) {
2800 perror("Error closing dirfd");
2801 return ret;
2802 }
2803 }
2804 if (td->dir) {
2805 ret = closedir(td->dir);
2806 if (ret) {
2807 perror("Error closedir");
2808 return ret;
2809 }
2810 }
2811 free(td->metadata_string);
2812 trace_debug_info_destroy(td);
2813 g_free(td);
2814 return 0;
2815 }
2816
2817 static
2818 void ctf_set_context(struct bt_trace_descriptor *descriptor,
2819 struct bt_context *ctx)
2820 {
2821 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2822 parent);
2823
2824 td->parent.ctx = ctx;
2825 }
2826
2827 static
2828 void ctf_set_handle(struct bt_trace_descriptor *descriptor,
2829 struct bt_trace_handle *handle)
2830 {
2831 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
2832 parent);
2833
2834 td->parent.handle = handle;
2835 }
2836
2837 static
2838 void __attribute__((constructor)) ctf_init(void)
2839 {
2840 int ret;
2841
2842 ctf_format.name = g_quark_from_static_string("ctf");
2843 ret = bt_register_format(&ctf_format);
2844 assert(!ret);
2845 }
2846
2847 static
2848 void __attribute__((destructor)) ctf_exit(void)
2849 {
2850 bt_unregister_format(&ctf_format);
2851 }
BabelTrace - Trace Format Babel Tower
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