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