Fix: segfault on error handling
[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
21 #include <babeltrace/format.h>
22 #include <babeltrace/ctf/types.h>
23 #include <babeltrace/ctf/metadata.h>
24 #include <babeltrace/babeltrace-internal.h>
25 #include <babeltrace/ctf/events-internal.h>
26 #include <babeltrace/trace-handle-internal.h>
27 #include <babeltrace/context-internal.h>
28 #include <babeltrace/uuid.h>
29 #include <babeltrace/endian.h>
30 #include <inttypes.h>
31 #include <stdio.h>
32 #include <sys/mman.h>
33 #include <errno.h>
34 #include <sys/types.h>
35 #include <sys/stat.h>
36 #include <fcntl.h>
37 #include <dirent.h>
38 #include <glib.h>
39 #include <unistd.h>
40 #include <stdlib.h>
41
42 #include "metadata/ctf-scanner.h"
43 #include "metadata/ctf-parser.h"
44 #include "metadata/ctf-ast.h"
45 #include "events-private.h"
46 #include "memstream.h"
47
48 /*
49 * We currently simply map a page to read the packet header and packet
50 * context to get the packet length and content length. (in bits)
51 */
52 #define MAX_PACKET_HEADER_LEN (getpagesize() * CHAR_BIT)
53 #define WRITE_PACKET_LEN (getpagesize() * 8 * CHAR_BIT)
54
55 #ifndef min
56 #define min(a, b) (((a) < (b)) ? (a) : (b))
57 #endif
58
59 #define NSEC_PER_SEC 1000000000ULL
60
61 int opt_clock_raw,
62 opt_clock_seconds,
63 opt_clock_date,
64 opt_clock_gmt;
65
66 uint64_t opt_clock_offset;
67
68 extern int yydebug;
69
70 static
71 struct trace_descriptor *ctf_open_trace(const char *path, int flags,
72 void (*packet_seek)(struct stream_pos *pos, size_t index,
73 int whence),
74 FILE *metadata_fp);
75 static
76 struct trace_descriptor *ctf_open_mmap_trace(
77 struct mmap_stream_list *mmap_list,
78 void (*packet_seek)(struct stream_pos *pos, size_t index,
79 int whence),
80 FILE *metadata_fp);
81 static
82 void ctf_set_context(struct trace_descriptor *descriptor,
83 struct bt_context *ctx);
84 static
85 void ctf_set_handle(struct trace_descriptor *descriptor,
86 struct bt_trace_handle *handle);
87
88 static
89 void ctf_close_trace(struct trace_descriptor *descriptor);
90 static
91 uint64_t ctf_timestamp_begin(struct trace_descriptor *descriptor,
92 struct bt_trace_handle *handle);
93 static
94 uint64_t ctf_timestamp_end(struct trace_descriptor *descriptor,
95 struct bt_trace_handle *handle);
96
97 static
98 rw_dispatch read_dispatch_table[] = {
99 [ CTF_TYPE_INTEGER ] = ctf_integer_read,
100 [ CTF_TYPE_FLOAT ] = ctf_float_read,
101 [ CTF_TYPE_ENUM ] = ctf_enum_read,
102 [ CTF_TYPE_STRING ] = ctf_string_read,
103 [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
104 [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
105 [ CTF_TYPE_ARRAY ] = ctf_array_read,
106 [ CTF_TYPE_SEQUENCE ] = ctf_sequence_read,
107 };
108
109 static
110 rw_dispatch write_dispatch_table[] = {
111 [ CTF_TYPE_INTEGER ] = ctf_integer_write,
112 [ CTF_TYPE_FLOAT ] = ctf_float_write,
113 [ CTF_TYPE_ENUM ] = ctf_enum_write,
114 [ CTF_TYPE_STRING ] = ctf_string_write,
115 [ CTF_TYPE_STRUCT ] = ctf_struct_rw,
116 [ CTF_TYPE_VARIANT ] = ctf_variant_rw,
117 [ CTF_TYPE_ARRAY ] = ctf_array_write,
118 [ CTF_TYPE_SEQUENCE ] = ctf_sequence_write,
119 };
120
121 static
122 struct format ctf_format = {
123 .open_trace = ctf_open_trace,
124 .open_mmap_trace = ctf_open_mmap_trace,
125 .close_trace = ctf_close_trace,
126 .set_context = ctf_set_context,
127 .set_handle = ctf_set_handle,
128 .timestamp_begin = ctf_timestamp_begin,
129 .timestamp_end = ctf_timestamp_end,
130 };
131
132 static
133 uint64_t ctf_timestamp_begin(struct trace_descriptor *descriptor,
134 struct bt_trace_handle *handle)
135 {
136 struct ctf_trace *tin;
137 uint64_t begin = ULLONG_MAX;
138 int i, j;
139
140 tin = container_of(descriptor, struct ctf_trace, parent);
141
142 if (!tin)
143 goto error;
144
145 /* for each stream_class */
146 for (i = 0; i < tin->streams->len; i++) {
147 struct ctf_stream_declaration *stream_class;
148
149 stream_class = g_ptr_array_index(tin->streams, i);
150 /* for each file_stream */
151 for (j = 0; j < stream_class->streams->len; j++) {
152 struct ctf_stream_definition *stream;
153 struct ctf_file_stream *cfs;
154 struct ctf_stream_pos *stream_pos;
155 struct packet_index *index;
156
157 stream = g_ptr_array_index(stream_class->streams, j);
158 cfs = container_of(stream, struct ctf_file_stream,
159 parent);
160 stream_pos = &cfs->pos;
161
162 index = &g_array_index(stream_pos->packet_index,
163 struct packet_index, 0);
164 if (index->timestamp_begin < begin)
165 begin = index->timestamp_begin;
166 }
167 }
168
169 return begin;
170
171 error:
172 return -1ULL;
173 }
174
175 static
176 uint64_t ctf_timestamp_end(struct trace_descriptor *descriptor,
177 struct bt_trace_handle *handle)
178 {
179 struct ctf_trace *tin;
180 uint64_t end = 0;
181 int i, j;
182
183 tin = container_of(descriptor, struct ctf_trace, parent);
184
185 if (!tin)
186 goto error;
187
188 /* for each stream_class */
189 for (i = 0; i < tin->streams->len; i++) {
190 struct ctf_stream_declaration *stream_class;
191
192 stream_class = g_ptr_array_index(tin->streams, i);
193 /* for each file_stream */
194 for (j = 0; j < stream_class->streams->len; j++) {
195 struct ctf_stream_definition *stream;
196 struct ctf_file_stream *cfs;
197 struct ctf_stream_pos *stream_pos;
198 struct packet_index *index;
199
200 stream = g_ptr_array_index(stream_class->streams, j);
201 cfs = container_of(stream, struct ctf_file_stream,
202 parent);
203 stream_pos = &cfs->pos;
204
205 index = &g_array_index(stream_pos->packet_index,
206 struct packet_index,
207 stream_pos->packet_index->len - 1);
208 if (index->timestamp_end > end)
209 end = index->timestamp_end;
210 }
211 }
212
213 return end;
214
215 error:
216 return -1ULL;
217 }
218
219 /*
220 * Update stream current timestamp, keep at clock frequency.
221 */
222 static
223 void ctf_update_timestamp(struct ctf_stream_definition *stream,
224 struct definition_integer *integer_definition)
225 {
226 struct declaration_integer *integer_declaration =
227 integer_definition->declaration;
228 uint64_t oldval, newval, updateval;
229
230 if (unlikely(integer_declaration->len == 64)) {
231 stream->timestamp = integer_definition->value._unsigned;
232 return;
233 }
234 /* keep low bits */
235 oldval = stream->timestamp;
236 oldval &= (1ULL << integer_declaration->len) - 1;
237 newval = integer_definition->value._unsigned;
238 /* Test for overflow by comparing low bits */
239 if (newval < oldval)
240 newval += 1ULL << integer_declaration->len;
241 /* updateval contains old high bits, and new low bits (sum) */
242 updateval = stream->timestamp;
243 updateval &= ~((1ULL << integer_declaration->len) - 1);
244 updateval += newval;
245 stream->prev_timestamp = stream->timestamp;
246 stream->timestamp = updateval;
247 }
248
249 /*
250 * Print timestamp, rescaling clock frequency to nanoseconds and
251 * applying offsets as needed (unix time).
252 */
253 void ctf_print_timestamp(FILE *fp,
254 struct ctf_stream_definition *stream,
255 uint64_t timestamp)
256 {
257 uint64_t ts_sec = 0, ts_nsec;
258
259 if (opt_clock_raw) {
260 ts_nsec = ctf_get_timestamp_raw(stream, timestamp);
261 } else {
262 ts_nsec = ctf_get_timestamp(stream, timestamp);
263 }
264
265 /* Add command-line offset */
266 ts_sec += opt_clock_offset;
267
268 ts_sec += ts_nsec / NSEC_PER_SEC;
269 ts_nsec = ts_nsec % NSEC_PER_SEC;
270
271 if (!opt_clock_seconds) {
272 struct tm tm;
273 time_t time_s = (time_t) ts_sec;
274
275 if (!opt_clock_gmt) {
276 struct tm *res;
277
278 res = localtime_r(&time_s, &tm);
279 if (!res) {
280 fprintf(stderr, "[warning] Unable to get localtime.\n");
281 goto seconds;
282 }
283 } else {
284 struct tm *res;
285
286 res = gmtime_r(&time_s, &tm);
287 if (!res) {
288 fprintf(stderr, "[warning] Unable to get gmtime.\n");
289 goto seconds;
290 }
291 }
292 if (opt_clock_date) {
293 char timestr[26];
294 size_t res;
295
296 /* Print date and time */
297 res = strftime(timestr, sizeof(timestr),
298 "%F ", &tm);
299 if (!res) {
300 fprintf(stderr, "[warning] Unable to print ascii time.\n");
301 goto seconds;
302 }
303 fprintf(fp, "%s", timestr);
304 }
305 /* Print time in HH:MM:SS.ns */
306 fprintf(fp, "%02d:%02d:%02d.%09" PRIu64,
307 tm.tm_hour, tm.tm_min, tm.tm_sec, ts_nsec);
308 goto end;
309 }
310 seconds:
311 fprintf(fp, "%3" PRIu64 ".%09" PRIu64,
312 ts_sec, ts_nsec);
313
314 end:
315 return;
316 }
317
318 static
319 int ctf_read_event(struct stream_pos *ppos, struct ctf_stream_definition *stream)
320 {
321 struct ctf_stream_pos *pos =
322 container_of(ppos, struct ctf_stream_pos, parent);
323 struct ctf_stream_declaration *stream_class = stream->stream_class;
324 struct ctf_event_definition *event;
325 uint64_t id = 0;
326 int ret;
327
328 /* We need to check for EOF here for empty files. */
329 if (unlikely(pos->offset == EOF))
330 return EOF;
331
332 ctf_pos_get_event(pos);
333
334 /* save the current position as a restore point */
335 pos->last_offset = pos->offset;
336 /* we just read the event, it is consumed when used by the caller */
337 stream->consumed = 0;
338
339 /*
340 * This is the EOF check after we've advanced the position in
341 * ctf_pos_get_event.
342 */
343 if (unlikely(pos->offset == EOF))
344 return EOF;
345 assert(pos->offset < pos->content_size);
346
347 /* Read event header */
348 if (likely(stream->stream_event_header)) {
349 struct definition_integer *integer_definition;
350 struct definition *variant;
351
352 ret = generic_rw(ppos, &stream->stream_event_header->p);
353 if (unlikely(ret))
354 goto error;
355 /* lookup event id */
356 integer_definition = lookup_integer(&stream->stream_event_header->p, "id", FALSE);
357 if (integer_definition) {
358 id = integer_definition->value._unsigned;
359 } else {
360 struct definition_enum *enum_definition;
361
362 enum_definition = lookup_enum(&stream->stream_event_header->p, "id", FALSE);
363 if (enum_definition) {
364 id = enum_definition->integer->value._unsigned;
365 }
366 }
367
368 variant = lookup_variant(&stream->stream_event_header->p, "v");
369 if (variant) {
370 integer_definition = lookup_integer(variant, "id", FALSE);
371 if (integer_definition) {
372 id = integer_definition->value._unsigned;
373 }
374 }
375 stream->event_id = id;
376
377 /* lookup timestamp */
378 stream->has_timestamp = 0;
379 integer_definition = lookup_integer(&stream->stream_event_header->p, "timestamp", FALSE);
380 if (integer_definition) {
381 ctf_update_timestamp(stream, integer_definition);
382 stream->has_timestamp = 1;
383 } else {
384 if (variant) {
385 integer_definition = lookup_integer(variant, "timestamp", FALSE);
386 if (integer_definition) {
387 ctf_update_timestamp(stream, integer_definition);
388 stream->has_timestamp = 1;
389 }
390 }
391 }
392 }
393
394 /* Read stream-declared event context */
395 if (stream->stream_event_context) {
396 ret = generic_rw(ppos, &stream->stream_event_context->p);
397 if (ret)
398 goto error;
399 }
400
401 if (unlikely(id >= stream_class->events_by_id->len)) {
402 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
403 return -EINVAL;
404 }
405 event = g_ptr_array_index(stream->events_by_id, id);
406 if (unlikely(!event)) {
407 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
408 return -EINVAL;
409 }
410
411 /* Read event-declared event context */
412 if (event->event_context) {
413 ret = generic_rw(ppos, &event->event_context->p);
414 if (ret)
415 goto error;
416 }
417
418 /* Read event payload */
419 if (likely(event->event_fields)) {
420 ret = generic_rw(ppos, &event->event_fields->p);
421 if (ret)
422 goto error;
423 }
424
425 return 0;
426
427 error:
428 fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
429 return ret;
430 }
431
432 static
433 int ctf_write_event(struct stream_pos *pos, struct ctf_stream_definition *stream)
434 {
435 struct ctf_stream_declaration *stream_class = stream->stream_class;
436 struct ctf_event_definition *event;
437 uint64_t id;
438 int ret;
439
440 id = stream->event_id;
441
442 /* print event header */
443 if (likely(stream->stream_event_header)) {
444 ret = generic_rw(pos, &stream->stream_event_header->p);
445 if (ret)
446 goto error;
447 }
448
449 /* print stream-declared event context */
450 if (stream->stream_event_context) {
451 ret = generic_rw(pos, &stream->stream_event_context->p);
452 if (ret)
453 goto error;
454 }
455
456 if (unlikely(id >= stream_class->events_by_id->len)) {
457 fprintf(stderr, "[error] Event id %" PRIu64 " is outside range.\n", id);
458 return -EINVAL;
459 }
460 event = g_ptr_array_index(stream->events_by_id, id);
461 if (unlikely(!event)) {
462 fprintf(stderr, "[error] Event id %" PRIu64 " is unknown.\n", id);
463 return -EINVAL;
464 }
465
466 /* print event-declared event context */
467 if (event->event_context) {
468 ret = generic_rw(pos, &event->event_context->p);
469 if (ret)
470 goto error;
471 }
472
473 /* Read and print event payload */
474 if (likely(event->event_fields)) {
475 ret = generic_rw(pos, &event->event_fields->p);
476 if (ret)
477 goto error;
478 }
479
480 return 0;
481
482 error:
483 fprintf(stderr, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
484 return ret;
485 }
486
487 void ctf_init_pos(struct ctf_stream_pos *pos, int fd, int open_flags)
488 {
489 pos->fd = fd;
490 pos->mmap_offset = 0;
491 pos->packet_size = 0;
492 pos->content_size = 0;
493 pos->content_size_loc = NULL;
494 pos->base = NULL;
495 pos->offset = 0;
496 pos->dummy = false;
497 pos->cur_index = 0;
498 if (fd >= 0)
499 pos->packet_index = g_array_new(FALSE, TRUE,
500 sizeof(struct packet_index));
501 else
502 pos->packet_index = NULL;
503 switch (open_flags & O_ACCMODE) {
504 case O_RDONLY:
505 pos->prot = PROT_READ;
506 pos->flags = MAP_PRIVATE;
507 pos->parent.rw_table = read_dispatch_table;
508 pos->parent.event_cb = ctf_read_event;
509 break;
510 case O_RDWR:
511 pos->prot = PROT_WRITE; /* Write has priority */
512 pos->flags = MAP_SHARED;
513 pos->parent.rw_table = write_dispatch_table;
514 pos->parent.event_cb = ctf_write_event;
515 if (fd >= 0)
516 ctf_packet_seek(&pos->parent, 0, SEEK_SET); /* position for write */
517 break;
518 default:
519 assert(0);
520 }
521 }
522
523 void ctf_fini_pos(struct ctf_stream_pos *pos)
524 {
525 int ret;
526
527 if (pos->prot == PROT_WRITE && pos->content_size_loc)
528 *pos->content_size_loc = pos->offset;
529 if (pos->base) {
530 /* unmap old base */
531 ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
532 if (ret) {
533 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
534 strerror(errno));
535 assert(0);
536 }
537 }
538 (void) g_array_free(pos->packet_index, TRUE);
539 }
540
541 /*
542 * for SEEK_CUR: go to next packet.
543 * for SEEK_POS: go to packet numer (index).
544 */
545 void ctf_packet_seek(struct stream_pos *stream_pos, size_t index, int whence)
546 {
547 struct ctf_stream_pos *pos =
548 container_of(stream_pos, struct ctf_stream_pos, parent);
549 struct ctf_file_stream *file_stream =
550 container_of(pos, struct ctf_file_stream, pos);
551 int ret;
552 off_t off;
553 struct packet_index *packet_index;
554
555 if (pos->prot == PROT_WRITE && pos->content_size_loc)
556 *pos->content_size_loc = pos->offset;
557
558 if (pos->base) {
559 /* unmap old base */
560 ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
561 if (ret) {
562 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
563 strerror(errno));
564 assert(0);
565 }
566 pos->base = NULL;
567 }
568
569 /*
570 * The caller should never ask for ctf_move_pos across packets,
571 * except to get exactly at the beginning of the next packet.
572 */
573 if (pos->prot == PROT_WRITE) {
574 switch (whence) {
575 case SEEK_CUR:
576 /* The writer will add padding */
577 pos->mmap_offset += WRITE_PACKET_LEN / CHAR_BIT;
578 break;
579 case SEEK_SET:
580 assert(index == 0); /* only seek supported for now */
581 pos->cur_index = 0;
582 break;
583 default:
584 assert(0);
585 }
586 pos->content_size = -1U; /* Unknown at this point */
587 pos->packet_size = WRITE_PACKET_LEN;
588 off = posix_fallocate(pos->fd, pos->mmap_offset,
589 pos->packet_size / CHAR_BIT);
590 assert(off >= 0);
591 pos->offset = 0;
592 } else {
593 read_next_packet:
594 switch (whence) {
595 case SEEK_CUR:
596 {
597 uint32_t events_discarded_diff;
598
599 if (pos->offset == EOF) {
600 return;
601 }
602 /* For printing discarded event count */
603 packet_index = &g_array_index(pos->packet_index,
604 struct packet_index, pos->cur_index);
605 events_discarded_diff = packet_index->events_discarded;
606 file_stream->parent.prev_timestamp_end =
607 packet_index->timestamp_end;
608 if (pos->cur_index > 0) {
609 packet_index = &g_array_index(pos->packet_index,
610 struct packet_index,
611 pos->cur_index - 1);
612 events_discarded_diff -= packet_index->events_discarded;
613 }
614 file_stream->parent.events_discarded = events_discarded_diff;
615 file_stream->parent.prev_timestamp = file_stream->parent.timestamp;
616 /* The reader will expect us to skip padding */
617 ++pos->cur_index;
618 break;
619 }
620 case SEEK_SET:
621 pos->cur_index = index;
622 file_stream->parent.prev_timestamp = 0;
623 file_stream->parent.prev_timestamp_end = 0;
624 break;
625 default:
626 assert(0);
627 }
628 if (pos->cur_index >= pos->packet_index->len) {
629 /*
630 * When a stream reaches the end of the
631 * file, we need to show the number of
632 * events discarded ourselves, because
633 * there is no next event scheduled to
634 * be printed in the output.
635 */
636 if (file_stream->parent.events_discarded) {
637 /*
638 * We need to check if we are in trace
639 * read or called from packet indexing.
640 * In this last case, the collection is
641 * not there, so we cannot print the
642 * timestamps.
643 */
644 if ((&file_stream->parent)->stream_class->trace->collection) {
645 fflush(stdout);
646 fprintf(stderr, "[warning] Tracer discarded %d events at end of stream between [",
647 file_stream->parent.events_discarded);
648 ctf_print_timestamp(stderr, &file_stream->parent,
649 file_stream->parent.prev_timestamp);
650 fprintf(stderr, "] and [");
651 ctf_print_timestamp(stderr, &file_stream->parent,
652 file_stream->parent.prev_timestamp_end);
653 fprintf(stderr, "]. You should consider increasing the buffer size.\n");
654 fflush(stderr);
655 }
656 file_stream->parent.events_discarded = 0;
657 }
658 pos->offset = EOF;
659 return;
660 }
661 packet_index = &g_array_index(pos->packet_index, struct packet_index,
662 pos->cur_index);
663 pos->mmap_offset = packet_index->offset;
664
665 /* Lookup context/packet size in index */
666 file_stream->parent.timestamp = packet_index->timestamp_begin;
667 pos->content_size = packet_index->content_size;
668 pos->packet_size = packet_index->packet_size;
669 if (packet_index->data_offset < packet_index->content_size) {
670 pos->offset = 0; /* will read headers */
671 } else if (packet_index->data_offset == packet_index->content_size) {
672 /* empty packet */
673 pos->offset = packet_index->data_offset;
674 whence = SEEK_CUR;
675 goto read_next_packet;
676 } else {
677 pos->offset = EOF;
678 return;
679 }
680 }
681 /* map new base. Need mapping length from header. */
682 pos->base = mmap(NULL, pos->packet_size / CHAR_BIT, pos->prot,
683 pos->flags, pos->fd, pos->mmap_offset);
684 if (pos->base == MAP_FAILED) {
685 fprintf(stderr, "[error] mmap error %s.\n",
686 strerror(errno));
687 assert(0);
688 }
689
690 /* update trace_packet_header and stream_packet_context */
691 if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) {
692 /* Read packet header */
693 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
694 assert(!ret);
695 }
696 if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) {
697 /* Read packet context */
698 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
699 assert(!ret);
700 }
701 }
702
703 static
704 int packet_metadata(struct ctf_trace *td, FILE *fp)
705 {
706 uint32_t magic;
707 size_t len;
708 int ret = 0;
709
710 len = fread(&magic, sizeof(magic), 1, fp);
711 if (len != 1) {
712 goto end;
713 }
714 if (magic == TSDL_MAGIC) {
715 ret = 1;
716 td->byte_order = BYTE_ORDER;
717 CTF_TRACE_SET_FIELD(td, byte_order);
718 } else if (magic == GUINT32_SWAP_LE_BE(TSDL_MAGIC)) {
719 ret = 1;
720 td->byte_order = (BYTE_ORDER == BIG_ENDIAN) ?
721 LITTLE_ENDIAN : BIG_ENDIAN;
722 CTF_TRACE_SET_FIELD(td, byte_order);
723 }
724 end:
725 rewind(fp);
726 return ret;
727 }
728
729 /*
730 * Returns 0 on success, -1 on error.
731 */
732 static
733 int check_version(unsigned int major, unsigned int minor)
734 {
735 switch (major) {
736 case 1:
737 switch (minor) {
738 case 8:
739 return 0;
740 default:
741 goto warning;
742 }
743 default:
744 goto warning;
745
746 }
747
748 /* eventually return an error instead of warning */
749 warning:
750 fprintf(stderr, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n",
751 major, minor);
752 return 0;
753 }
754
755 static
756 int ctf_open_trace_metadata_packet_read(struct ctf_trace *td, FILE *in,
757 FILE *out)
758 {
759 struct metadata_packet_header header;
760 size_t readlen, writelen, toread;
761 char buf[4096 + 1]; /* + 1 for debug-mode \0 */
762 int ret = 0;
763
764 readlen = fread(&header, header_sizeof(header), 1, in);
765 if (readlen < 1)
766 return -EINVAL;
767
768 if (td->byte_order != BYTE_ORDER) {
769 header.magic = GUINT32_SWAP_LE_BE(header.magic);
770 header.checksum = GUINT32_SWAP_LE_BE(header.checksum);
771 header.content_size = GUINT32_SWAP_LE_BE(header.content_size);
772 header.packet_size = GUINT32_SWAP_LE_BE(header.packet_size);
773 }
774 if (header.checksum)
775 fprintf(stderr, "[warning] checksum verification not supported yet.\n");
776 if (header.compression_scheme) {
777 fprintf(stderr, "[error] compression (%u) not supported yet.\n",
778 header.compression_scheme);
779 return -EINVAL;
780 }
781 if (header.encryption_scheme) {
782 fprintf(stderr, "[error] encryption (%u) not supported yet.\n",
783 header.encryption_scheme);
784 return -EINVAL;
785 }
786 if (header.checksum_scheme) {
787 fprintf(stderr, "[error] checksum (%u) not supported yet.\n",
788 header.checksum_scheme);
789 return -EINVAL;
790 }
791 if (check_version(header.major, header.minor) < 0)
792 return -EINVAL;
793 if (!CTF_TRACE_FIELD_IS_SET(td, uuid)) {
794 memcpy(td->uuid, header.uuid, sizeof(header.uuid));
795 CTF_TRACE_SET_FIELD(td, uuid);
796 } else {
797 if (babeltrace_uuid_compare(header.uuid, td->uuid))
798 return -EINVAL;
799 }
800
801 toread = (header.content_size / CHAR_BIT) - header_sizeof(header);
802
803 for (;;) {
804 readlen = fread(buf, sizeof(char), min(sizeof(buf) - 1, toread), in);
805 if (ferror(in)) {
806 ret = -EINVAL;
807 break;
808 }
809 if (babeltrace_debug) {
810 buf[readlen] = '\0';
811 fprintf(stderr, "[debug] metadata packet read: %s\n",
812 buf);
813 }
814
815 writelen = fwrite(buf, sizeof(char), readlen, out);
816 if (writelen < readlen) {
817 ret = -EIO;
818 break;
819 }
820 if (ferror(out)) {
821 ret = -EINVAL;
822 break;
823 }
824 toread -= readlen;
825 if (!toread) {
826 ret = 0; /* continue reading next packet */
827 goto read_padding;
828 }
829 }
830 return ret;
831
832 read_padding:
833 toread = (header.packet_size - header.content_size) / CHAR_BIT;
834 ret = fseek(in, toread, SEEK_CUR);
835 if (ret < 0) {
836 fprintf(stderr, "[warning] Missing padding at end of file\n");
837 ret = 0;
838 }
839 return ret;
840 }
841
842 static
843 int ctf_open_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
844 char **buf)
845 {
846 FILE *in, *out;
847 size_t size;
848 int ret;
849
850 in = *fp;
851 /*
852 * Using strlen on *buf instead of size of open_memstream
853 * because its size includes garbage at the end (after final
854 * \0). This is the allocated size, not the actual string size.
855 */
856 out = babeltrace_open_memstream(buf, &size);
857 if (out == NULL) {
858 perror("Metadata open_memstream");
859 return -errno;
860 }
861 for (;;) {
862 ret = ctf_open_trace_metadata_packet_read(td, in, out);
863 if (ret) {
864 break;
865 }
866 if (feof(in)) {
867 ret = 0;
868 break;
869 }
870 }
871 /* close to flush the buffer */
872 ret = babeltrace_close_memstream(buf, &size, out);
873 if (ret < 0) {
874 perror("babeltrace_flush_memstream");
875 fclose(in);
876 return -errno;
877 }
878 fclose(in);
879 /* open for reading */
880 *fp = babeltrace_fmemopen(*buf, strlen(*buf), "rb");
881 if (!*fp) {
882 perror("Metadata fmemopen");
883 return -errno;
884 }
885 return 0;
886 }
887
888 static
889 int ctf_open_trace_metadata_read(struct ctf_trace *td,
890 void (*packet_seek)(struct stream_pos *pos, size_t index,
891 int whence), FILE *metadata_fp)
892 {
893 struct ctf_scanner *scanner;
894 struct ctf_file_stream *metadata_stream;
895 FILE *fp;
896 char *buf = NULL;
897 int ret = 0;
898
899 metadata_stream = g_new0(struct ctf_file_stream, 1);
900
901 if (packet_seek) {
902 metadata_stream->pos.packet_seek = packet_seek;
903 } else {
904 fprintf(stderr, "[error] packet_seek function undefined.\n");
905 ret = -1;
906 goto end_stream;
907 }
908
909 if (metadata_fp) {
910 fp = metadata_fp;
911 } else {
912 td->metadata = &metadata_stream->parent;
913 metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
914 if (metadata_stream->pos.fd < 0) {
915 fprintf(stderr, "Unable to open metadata.\n");
916 return metadata_stream->pos.fd;
917 }
918
919 fp = fdopen(metadata_stream->pos.fd, "r");
920 if (!fp) {
921 fprintf(stderr, "[error] Unable to open metadata stream.\n");
922 perror("Metadata stream open");
923 ret = -errno;
924 goto end_stream;
925 }
926 }
927 if (babeltrace_debug)
928 yydebug = 1;
929
930 if (packet_metadata(td, fp)) {
931 ret = ctf_open_trace_metadata_stream_read(td, &fp, &buf);
932 if (ret)
933 goto end_packet_read;
934 } else {
935 unsigned int major, minor;
936 ssize_t nr_items;
937
938 td->byte_order = BYTE_ORDER;
939
940 /* Check text-only metadata header and version */
941 nr_items = fscanf(fp, "/* CTF %u.%u", &major, &minor);
942 if (nr_items < 2)
943 fprintf(stderr, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
944 if (check_version(major, minor) < 0) {
945 ret = -EINVAL;
946 goto end_packet_read;
947 }
948 rewind(fp);
949 }
950
951 scanner = ctf_scanner_alloc(fp);
952 if (!scanner) {
953 fprintf(stderr, "[error] Error allocating scanner\n");
954 ret = -ENOMEM;
955 goto end_scanner_alloc;
956 }
957 ret = ctf_scanner_append_ast(scanner);
958 if (ret) {
959 fprintf(stderr, "[error] Error creating AST\n");
960 goto end;
961 }
962
963 if (babeltrace_debug) {
964 ret = ctf_visitor_print_xml(stderr, 0, &scanner->ast->root);
965 if (ret) {
966 fprintf(stderr, "[error] Error visiting AST for XML output\n");
967 goto end;
968 }
969 }
970
971 ret = ctf_visitor_semantic_check(stderr, 0, &scanner->ast->root);
972 if (ret) {
973 fprintf(stderr, "[error] Error in CTF semantic validation %d\n", ret);
974 goto end;
975 }
976 ret = ctf_visitor_construct_metadata(stderr, 0, &scanner->ast->root,
977 td, td->byte_order);
978 if (ret) {
979 fprintf(stderr, "[error] Error in CTF metadata constructor %d\n", ret);
980 goto end;
981 }
982 end:
983 ctf_scanner_free(scanner);
984 end_scanner_alloc:
985 end_packet_read:
986 if (fp)
987 fclose(fp);
988 free(buf);
989 end_stream:
990 close(metadata_stream->pos.fd);
991 if (ret)
992 g_free(metadata_stream);
993 return ret;
994 }
995
996 static
997 struct ctf_event_definition *create_event_definitions(struct ctf_trace *td,
998 struct ctf_stream_definition *stream,
999 struct ctf_event_declaration *event)
1000 {
1001 struct ctf_event_definition *stream_event = g_new0(struct ctf_event_definition, 1);
1002
1003 if (event->context_decl) {
1004 struct definition *definition =
1005 event->context_decl->p.definition_new(&event->context_decl->p,
1006 stream->parent_def_scope, 0, 0, "event.context");
1007 if (!definition) {
1008 goto error;
1009 }
1010 stream_event->event_context = container_of(definition,
1011 struct definition_struct, p);
1012 stream->parent_def_scope = stream_event->event_context->p.scope;
1013 }
1014 if (event->fields_decl) {
1015 struct definition *definition =
1016 event->fields_decl->p.definition_new(&event->fields_decl->p,
1017 stream->parent_def_scope, 0, 0, "event.fields");
1018 if (!definition) {
1019 goto error;
1020 }
1021 stream_event->event_fields = container_of(definition,
1022 struct definition_struct, p);
1023 stream->parent_def_scope = stream_event->event_fields->p.scope;
1024 }
1025 stream_event->stream = stream;
1026 return stream_event;
1027
1028 error:
1029 if (stream_event->event_fields)
1030 definition_unref(&stream_event->event_fields->p);
1031 if (stream_event->event_context)
1032 definition_unref(&stream_event->event_context->p);
1033 return NULL;
1034 }
1035
1036 static
1037 int create_stream_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1038 {
1039 struct ctf_stream_declaration *stream_class;
1040 int ret;
1041 int i;
1042
1043 if (stream->stream_definitions_created)
1044 return 0;
1045
1046 stream_class = stream->stream_class;
1047
1048 if (stream_class->packet_context_decl) {
1049 struct definition *definition =
1050 stream_class->packet_context_decl->p.definition_new(&stream_class->packet_context_decl->p,
1051 stream->parent_def_scope, 0, 0, "stream.packet.context");
1052 if (!definition) {
1053 ret = -EINVAL;
1054 goto error;
1055 }
1056 stream->stream_packet_context = container_of(definition,
1057 struct definition_struct, p);
1058 stream->parent_def_scope = stream->stream_packet_context->p.scope;
1059 }
1060 if (stream_class->event_header_decl) {
1061 struct definition *definition =
1062 stream_class->event_header_decl->p.definition_new(&stream_class->event_header_decl->p,
1063 stream->parent_def_scope, 0, 0, "stream.event.header");
1064 if (!definition) {
1065 ret = -EINVAL;
1066 goto error;
1067 }
1068 stream->stream_event_header =
1069 container_of(definition, struct definition_struct, p);
1070 stream->parent_def_scope = stream->stream_event_header->p.scope;
1071 }
1072 if (stream_class->event_context_decl) {
1073 struct definition *definition =
1074 stream_class->event_context_decl->p.definition_new(&stream_class->event_context_decl->p,
1075 stream->parent_def_scope, 0, 0, "stream.event.context");
1076 if (!definition) {
1077 ret = -EINVAL;
1078 goto error;
1079 }
1080 stream->stream_event_context =
1081 container_of(definition, struct definition_struct, p);
1082 stream->parent_def_scope = stream->stream_event_context->p.scope;
1083 }
1084 stream->events_by_id = g_ptr_array_new();
1085 g_ptr_array_set_size(stream->events_by_id, stream_class->events_by_id->len);
1086 for (i = 0; i < stream->events_by_id->len; i++) {
1087 struct ctf_event_declaration *event = g_ptr_array_index(stream_class->events_by_id, i);
1088 struct ctf_event_definition *stream_event;
1089
1090 if (!event)
1091 continue;
1092 stream_event = create_event_definitions(td, stream, event);
1093 if (!stream_event)
1094 goto error_event;
1095 g_ptr_array_index(stream->events_by_id, i) = stream_event;
1096 }
1097 return 0;
1098
1099 error_event:
1100 for (i = 0; i < stream->events_by_id->len; i++) {
1101 struct ctf_event_definition *stream_event = g_ptr_array_index(stream->events_by_id, i);
1102 if (stream_event)
1103 g_free(stream_event);
1104 }
1105 g_ptr_array_free(stream->events_by_id, TRUE);
1106 error:
1107 if (stream->stream_event_context)
1108 definition_unref(&stream->stream_event_context->p);
1109 if (stream->stream_event_header)
1110 definition_unref(&stream->stream_event_header->p);
1111 if (stream->stream_packet_context)
1112 definition_unref(&stream->stream_packet_context->p);
1113 return ret;
1114 }
1115
1116
1117 static
1118 int create_stream_packet_index(struct ctf_trace *td,
1119 struct ctf_file_stream *file_stream)
1120 {
1121 struct ctf_stream_declaration *stream;
1122 int len_index;
1123 struct ctf_stream_pos *pos;
1124 struct stat filestats;
1125 struct packet_index packet_index;
1126 int first_packet = 1;
1127 int ret;
1128
1129 pos = &file_stream->pos;
1130
1131 ret = fstat(pos->fd, &filestats);
1132 if (ret < 0)
1133 return ret;
1134
1135 if (filestats.st_size < MAX_PACKET_HEADER_LEN / CHAR_BIT)
1136 return -EINVAL;
1137
1138 for (pos->mmap_offset = 0; pos->mmap_offset < filestats.st_size; ) {
1139 uint64_t stream_id = 0;
1140
1141 if (pos->base) {
1142 /* unmap old base */
1143 ret = munmap(pos->base, pos->packet_size / CHAR_BIT);
1144 if (ret) {
1145 fprintf(stderr, "[error] Unable to unmap old base: %s.\n",
1146 strerror(errno));
1147 return ret;
1148 }
1149 pos->base = NULL;
1150 }
1151 /* map new base. Need mapping length from header. */
1152 pos->base = mmap(NULL, MAX_PACKET_HEADER_LEN / CHAR_BIT, PROT_READ,
1153 MAP_PRIVATE, pos->fd, pos->mmap_offset);
1154 pos->content_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
1155 pos->packet_size = MAX_PACKET_HEADER_LEN; /* Unknown at this point */
1156 pos->offset = 0; /* Position of the packet header */
1157
1158 packet_index.offset = pos->mmap_offset;
1159 packet_index.content_size = 0;
1160 packet_index.packet_size = 0;
1161 packet_index.timestamp_begin = 0;
1162 packet_index.timestamp_end = 0;
1163 packet_index.events_discarded = 0;
1164
1165 /* read and check header, set stream id (and check) */
1166 if (file_stream->parent.trace_packet_header) {
1167 /* Read packet header */
1168 ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
1169 if (ret)
1170 return ret;
1171 len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("magic"));
1172 if (len_index >= 0) {
1173 struct definition *field;
1174 uint64_t magic;
1175
1176 field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1177 magic = get_unsigned_int(field);
1178 if (magic != CTF_MAGIC) {
1179 fprintf(stderr, "[error] Invalid magic number 0x%" PRIX64 " at packet %u (file offset %zd).\n",
1180 magic,
1181 file_stream->pos.packet_index->len,
1182 (ssize_t) pos->mmap_offset);
1183 return -EINVAL;
1184 }
1185 }
1186
1187 /* check uuid */
1188 len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("uuid"));
1189 if (len_index >= 0) {
1190 struct definition_array *defarray;
1191 struct definition *field;
1192 uint64_t i;
1193 uint8_t uuidval[BABELTRACE_UUID_LEN];
1194
1195 field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1196 assert(field->declaration->id == CTF_TYPE_ARRAY);
1197 defarray = container_of(field, struct definition_array, p);
1198 assert(array_len(defarray) == BABELTRACE_UUID_LEN);
1199
1200 for (i = 0; i < BABELTRACE_UUID_LEN; i++) {
1201 struct definition *elem;
1202
1203 elem = array_index(defarray, i);
1204 uuidval[i] = get_unsigned_int(elem);
1205 }
1206 ret = babeltrace_uuid_compare(td->uuid, uuidval);
1207 if (ret) {
1208 fprintf(stderr, "[error] Unique Universal Identifiers do not match.\n");
1209 return -EINVAL;
1210 }
1211 }
1212
1213
1214 len_index = struct_declaration_lookup_field_index(file_stream->parent.trace_packet_header->declaration, g_quark_from_static_string("stream_id"));
1215 if (len_index >= 0) {
1216 struct definition *field;
1217
1218 field = struct_definition_get_field_from_index(file_stream->parent.trace_packet_header, len_index);
1219 stream_id = get_unsigned_int(field);
1220 }
1221 }
1222
1223 if (!first_packet && file_stream->parent.stream_id != stream_id) {
1224 fprintf(stderr, "[error] Stream ID is changing within a stream.\n");
1225 return -EINVAL;
1226 }
1227 if (first_packet) {
1228 file_stream->parent.stream_id = stream_id;
1229 if (stream_id >= td->streams->len) {
1230 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1231 return -EINVAL;
1232 }
1233 stream = g_ptr_array_index(td->streams, stream_id);
1234 if (!stream) {
1235 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared in metadata.\n", stream_id);
1236 return -EINVAL;
1237 }
1238 file_stream->parent.stream_class = stream;
1239 ret = create_stream_definitions(td, &file_stream->parent);
1240 if (ret)
1241 return ret;
1242 }
1243 first_packet = 0;
1244
1245 if (file_stream->parent.stream_packet_context) {
1246 /* Read packet context */
1247 ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
1248 if (ret)
1249 return ret;
1250 /* read content size from header */
1251 len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("content_size"));
1252 if (len_index >= 0) {
1253 struct definition *field;
1254
1255 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1256 packet_index.content_size = get_unsigned_int(field);
1257 } else {
1258 /* Use file size for packet size */
1259 packet_index.content_size = filestats.st_size * CHAR_BIT;
1260 }
1261
1262 /* read packet size from header */
1263 len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("packet_size"));
1264 if (len_index >= 0) {
1265 struct definition *field;
1266
1267 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1268 packet_index.packet_size = get_unsigned_int(field);
1269 } else {
1270 /* Use content size if non-zero, else file size */
1271 packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
1272 }
1273
1274 /* read timestamp begin from header */
1275 len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_begin"));
1276 if (len_index >= 0) {
1277 struct definition *field;
1278
1279 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1280 packet_index.timestamp_begin = get_unsigned_int(field);
1281 }
1282
1283 /* read timestamp end from header */
1284 len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("timestamp_end"));
1285 if (len_index >= 0) {
1286 struct definition *field;
1287
1288 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1289 packet_index.timestamp_end = get_unsigned_int(field);
1290 }
1291
1292 /* read events discarded from header */
1293 len_index = struct_declaration_lookup_field_index(file_stream->parent.stream_packet_context->declaration, g_quark_from_static_string("events_discarded"));
1294 if (len_index >= 0) {
1295 struct definition *field;
1296
1297 field = struct_definition_get_field_from_index(file_stream->parent.stream_packet_context, len_index);
1298 packet_index.events_discarded = get_unsigned_int(field);
1299 }
1300 } else {
1301 /* Use file size for packet size */
1302 packet_index.content_size = filestats.st_size * CHAR_BIT;
1303 /* Use content size if non-zero, else file size */
1304 packet_index.packet_size = packet_index.content_size ? : filestats.st_size * CHAR_BIT;
1305 }
1306
1307 /* Validate content size and packet size values */
1308 if (packet_index.content_size > packet_index.packet_size) {
1309 fprintf(stderr, "[error] Content size (%" PRIu64 " bits) is larger than packet size (%" PRIu64 " bits).\n",
1310 packet_index.content_size, packet_index.packet_size);
1311 return -EINVAL;
1312 }
1313
1314 if (packet_index.packet_size > ((uint64_t)filestats.st_size - packet_index.offset) * CHAR_BIT) {
1315 fprintf(stderr, "[error] Packet size (%" PRIu64 " bits) is larger than remaining file size (%" PRIu64 " bits).\n",
1316 packet_index.content_size, ((uint64_t)filestats.st_size - packet_index.offset) * CHAR_BIT);
1317 return -EINVAL;
1318 }
1319
1320 /* Save position after header and context */
1321 packet_index.data_offset = pos->offset;
1322
1323 /* add index to packet array */
1324 g_array_append_val(file_stream->pos.packet_index, packet_index);
1325
1326 pos->mmap_offset += packet_index.packet_size / CHAR_BIT;
1327 }
1328
1329 /* Move pos back to beginning of file */
1330 ctf_packet_seek(&pos->parent, 0, SEEK_SET); /* position for write */
1331
1332 return 0;
1333 }
1334
1335 static
1336 int create_trace_definitions(struct ctf_trace *td, struct ctf_stream_definition *stream)
1337 {
1338 int ret;
1339
1340 if (td->packet_header_decl) {
1341 struct definition *definition =
1342 td->packet_header_decl->p.definition_new(&td->packet_header_decl->p,
1343 stream->parent_def_scope, 0, 0, "trace.packet.header");
1344 if (!definition) {
1345 ret = -EINVAL;
1346 goto error;
1347 }
1348 stream->trace_packet_header =
1349 container_of(definition, struct definition_struct, p);
1350 stream->parent_def_scope = stream->trace_packet_header->p.scope;
1351 }
1352
1353 return 0;
1354
1355 error:
1356 return ret;
1357 }
1358
1359 /*
1360 * Note: many file streams can inherit from the same stream class
1361 * description (metadata).
1362 */
1363 static
1364 int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
1365 void (*packet_seek)(struct stream_pos *pos, size_t index,
1366 int whence))
1367 {
1368 int ret;
1369 struct ctf_file_stream *file_stream;
1370
1371 ret = openat(td->dirfd, path, flags);
1372 if (ret < 0) {
1373 perror("File stream openat()");
1374 goto error;
1375 }
1376 file_stream = g_new0(struct ctf_file_stream, 1);
1377
1378 if (packet_seek) {
1379 file_stream->pos.packet_seek = packet_seek;
1380 } else {
1381 fprintf(stderr, "[error] packet_seek function undefined.\n");
1382 ret = -1;
1383 goto error_def;
1384 }
1385
1386 ctf_init_pos(&file_stream->pos, ret, flags);
1387 ret = create_trace_definitions(td, &file_stream->parent);
1388 if (ret)
1389 goto error_def;
1390 /*
1391 * For now, only a single slock is supported.
1392 */
1393 file_stream->parent.current_clock = td->single_clock;
1394 ret = create_stream_packet_index(td, file_stream);
1395 if (ret)
1396 goto error_index;
1397 /* Add stream file to stream class */
1398 g_ptr_array_add(file_stream->parent.stream_class->streams,
1399 &file_stream->parent);
1400 return 0;
1401
1402 error_index:
1403 if (file_stream->parent.trace_packet_header)
1404 definition_unref(&file_stream->parent.trace_packet_header->p);
1405 error_def:
1406 ctf_fini_pos(&file_stream->pos);
1407 close(file_stream->pos.fd);
1408 g_free(file_stream);
1409 error:
1410 return ret;
1411 }
1412
1413 static
1414 int ctf_open_trace_read(struct ctf_trace *td,
1415 const char *path, int flags,
1416 void (*packet_seek)(struct stream_pos *pos, size_t index,
1417 int whence), FILE *metadata_fp)
1418 {
1419 int ret;
1420 struct dirent *dirent;
1421 struct dirent *diriter;
1422 size_t dirent_len;
1423
1424 td->flags = flags;
1425
1426 /* Open trace directory */
1427 td->dir = opendir(path);
1428 if (!td->dir) {
1429 fprintf(stderr, "[error] Unable to open trace directory.\n");
1430 ret = -ENOENT;
1431 goto error;
1432 }
1433
1434 td->dirfd = open(path, 0);
1435 if (td->dirfd < 0) {
1436 fprintf(stderr, "[error] Unable to open trace directory file descriptor.\n");
1437 perror("Trace directory open");
1438 ret = -errno;
1439 goto error_dirfd;
1440 }
1441 strncpy(td->path, path, sizeof(td->path));
1442 td->path[sizeof(td->path) - 1] = '\0';
1443
1444 /*
1445 * Keep the metadata file separate.
1446 */
1447
1448 ret = ctf_open_trace_metadata_read(td, packet_seek, metadata_fp);
1449 if (ret) {
1450 goto error_metadata;
1451 }
1452
1453 /*
1454 * Open each stream: for each file, try to open, check magic
1455 * number, and get the stream ID to add to the right location in
1456 * the stream array.
1457 */
1458
1459 dirent_len = offsetof(struct dirent, d_name) +
1460 fpathconf(td->dirfd, _PC_NAME_MAX) + 1;
1461
1462 dirent = malloc(dirent_len);
1463
1464 for (;;) {
1465 ret = readdir_r(td->dir, dirent, &diriter);
1466 if (ret) {
1467 fprintf(stderr, "[error] Readdir error.\n");
1468 goto readdir_error;
1469 }
1470 if (!diriter)
1471 break;
1472 /* Ignore hidden files, ., .. and metadata. */
1473 if (!strncmp(diriter->d_name, ".", 1)
1474 || !strcmp(diriter->d_name, "..")
1475 || !strcmp(diriter->d_name, "metadata"))
1476 continue;
1477 ret = ctf_open_file_stream_read(td, diriter->d_name,
1478 flags, packet_seek);
1479 if (ret) {
1480 fprintf(stderr, "[error] Open file stream error.\n");
1481 goto readdir_error;
1482 }
1483 }
1484
1485 free(dirent);
1486 return 0;
1487
1488 readdir_error:
1489 free(dirent);
1490 error_metadata:
1491 close(td->dirfd);
1492 error_dirfd:
1493 closedir(td->dir);
1494 error:
1495 return ret;
1496 }
1497
1498 static
1499 struct trace_descriptor *ctf_open_trace(const char *path, int flags,
1500 void (*packet_seek)(struct stream_pos *pos, size_t index,
1501 int whence), FILE *metadata_fp)
1502 {
1503 struct ctf_trace *td;
1504 int ret;
1505
1506 /*
1507 * If packet_seek is NULL, we provide our default version.
1508 */
1509 if (!packet_seek)
1510 packet_seek = ctf_packet_seek;
1511
1512 td = g_new0(struct ctf_trace, 1);
1513
1514 switch (flags & O_ACCMODE) {
1515 case O_RDONLY:
1516 if (!path) {
1517 fprintf(stderr, "[error] Path missing for input CTF trace.\n");
1518 goto error;
1519 }
1520 ret = ctf_open_trace_read(td, path, flags, packet_seek, metadata_fp);
1521 if (ret)
1522 goto error;
1523 break;
1524 case O_RDWR:
1525 fprintf(stderr, "[error] Opening CTF traces for output is not supported yet.\n");
1526 goto error;
1527 default:
1528 fprintf(stderr, "[error] Incorrect open flags.\n");
1529 goto error;
1530 }
1531
1532 return &td->parent;
1533 error:
1534 g_free(td);
1535 return NULL;
1536 }
1537
1538
1539 void ctf_init_mmap_pos(struct ctf_stream_pos *pos,
1540 struct mmap_stream *mmap_info)
1541 {
1542 pos->mmap_offset = 0;
1543 pos->packet_size = 0;
1544 pos->content_size = 0;
1545 pos->content_size_loc = NULL;
1546 pos->fd = mmap_info->fd;
1547 pos->base = 0;
1548 pos->offset = 0;
1549 pos->dummy = false;
1550 pos->cur_index = 0;
1551 pos->packet_index = NULL;
1552 pos->prot = PROT_READ;
1553 pos->flags = MAP_PRIVATE;
1554 pos->parent.rw_table = read_dispatch_table;
1555 pos->parent.event_cb = ctf_read_event;
1556 }
1557
1558 static
1559 int prepare_mmap_stream_definition(struct ctf_trace *td,
1560 struct ctf_file_stream *file_stream)
1561 {
1562 struct ctf_stream_declaration *stream;
1563 uint64_t stream_id = 0;
1564 int ret;
1565
1566 file_stream->parent.stream_id = stream_id;
1567 if (stream_id >= td->streams->len) {
1568 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
1569 "in metadata.\n", stream_id);
1570 ret = -EINVAL;
1571 goto end;
1572 }
1573 stream = g_ptr_array_index(td->streams, stream_id);
1574 if (!stream) {
1575 fprintf(stderr, "[error] Stream %" PRIu64 " is not declared "
1576 "in metadata.\n", stream_id);
1577 ret = -EINVAL;
1578 goto end;
1579 }
1580 file_stream->parent.stream_class = stream;
1581 ret = create_stream_definitions(td, &file_stream->parent);
1582 end:
1583 return ret;
1584 }
1585
1586 static
1587 int ctf_open_mmap_stream_read(struct ctf_trace *td,
1588 struct mmap_stream *mmap_info,
1589 void (*packet_seek)(struct stream_pos *pos, size_t index,
1590 int whence))
1591 {
1592 int ret;
1593 struct ctf_file_stream *file_stream;
1594
1595 file_stream = g_new0(struct ctf_file_stream, 1);
1596 ctf_init_mmap_pos(&file_stream->pos, mmap_info);
1597
1598 file_stream->pos.packet_seek = packet_seek;
1599
1600 ret = create_trace_definitions(td, &file_stream->parent);
1601 if (ret) {
1602 goto error_def;
1603 }
1604
1605 ret = prepare_mmap_stream_definition(td, file_stream);
1606 if (ret)
1607 goto error_index;
1608
1609 /* Add stream file to stream class */
1610 g_ptr_array_add(file_stream->parent.stream_class->streams,
1611 &file_stream->parent);
1612 return 0;
1613
1614 error_index:
1615 if (file_stream->parent.trace_packet_header)
1616 definition_unref(&file_stream->parent.trace_packet_header->p);
1617 error_def:
1618 g_free(file_stream);
1619 return ret;
1620 }
1621
1622 int ctf_open_mmap_trace_read(struct ctf_trace *td,
1623 struct mmap_stream_list *mmap_list,
1624 void (*packet_seek)(struct stream_pos *pos, size_t index,
1625 int whence),
1626 FILE *metadata_fp)
1627 {
1628 int ret;
1629 struct mmap_stream *mmap_info;
1630
1631 ret = ctf_open_trace_metadata_read(td, ctf_packet_seek, metadata_fp);
1632 if (ret) {
1633 goto error;
1634 }
1635
1636 /*
1637 * for each stream, try to open, check magic number, and get the
1638 * stream ID to add to the right location in the stream array.
1639 */
1640 bt_list_for_each_entry(mmap_info, &mmap_list->head, list) {
1641 ret = ctf_open_mmap_stream_read(td, mmap_info, packet_seek);
1642 if (ret) {
1643 fprintf(stderr, "[error] Open file mmap stream error.\n");
1644 goto error;
1645 }
1646 }
1647
1648 return 0;
1649
1650 error:
1651 return ret;
1652 }
1653
1654 static
1655 struct trace_descriptor *ctf_open_mmap_trace(
1656 struct mmap_stream_list *mmap_list,
1657 void (*packet_seek)(struct stream_pos *pos, size_t index,
1658 int whence),
1659 FILE *metadata_fp)
1660 {
1661 struct ctf_trace *td;
1662 int ret;
1663
1664 if (!metadata_fp) {
1665 fprintf(stderr, "[error] No metadata file pointer associated, "
1666 "required for mmap parsing\n");
1667 goto error;
1668 }
1669 if (!packet_seek) {
1670 fprintf(stderr, "[error] packet_seek function undefined.\n");
1671 goto error;
1672 }
1673 td = g_new0(struct ctf_trace, 1);
1674 ret = ctf_open_mmap_trace_read(td, mmap_list, packet_seek, metadata_fp);
1675 if (ret)
1676 goto error_free;
1677
1678 return &td->parent;
1679
1680 error_free:
1681 g_free(td);
1682 error:
1683 return NULL;
1684 }
1685
1686 static
1687 void ctf_close_file_stream(struct ctf_file_stream *file_stream)
1688 {
1689 ctf_fini_pos(&file_stream->pos);
1690 close(file_stream->pos.fd);
1691 }
1692
1693 static
1694 void ctf_close_trace(struct trace_descriptor *tdp)
1695 {
1696 struct ctf_trace *td = container_of(tdp, struct ctf_trace, parent);
1697 int i;
1698
1699 if (td->streams) {
1700 for (i = 0; i < td->streams->len; i++) {
1701 struct ctf_stream_declaration *stream;
1702 int j;
1703
1704 stream = g_ptr_array_index(td->streams, i);
1705 if (!stream)
1706 continue;
1707 for (j = 0; j < stream->streams->len; j++) {
1708 struct ctf_file_stream *file_stream;
1709 file_stream = container_of(g_ptr_array_index(stream->streams, j), struct ctf_file_stream, parent);
1710 ctf_close_file_stream(file_stream);
1711 }
1712
1713 }
1714 g_ptr_array_free(td->streams, TRUE);
1715 }
1716
1717 if (td->event_declarations) {
1718 for (i = 0; i < td->event_declarations->len; i++) {
1719 struct bt_ctf_event_decl *event;
1720
1721 event = g_ptr_array_index(td->event_declarations, i);
1722 if (event->context_decl)
1723 g_ptr_array_free(event->context_decl, TRUE);
1724 if (event->fields_decl)
1725 g_ptr_array_free(event->fields_decl, TRUE);
1726 if (event->packet_header_decl)
1727 g_ptr_array_free(event->packet_header_decl, TRUE);
1728 if (event->event_context_decl)
1729 g_ptr_array_free(event->event_context_decl, TRUE);
1730 if (event->event_header_decl)
1731 g_ptr_array_free(event->event_header_decl, TRUE);
1732 if (event->packet_context_decl)
1733 g_ptr_array_free(event->packet_context_decl, TRUE);
1734 g_free(event);
1735 }
1736 g_ptr_array_free(td->event_declarations, TRUE);
1737 }
1738 closedir(td->dir);
1739 g_free(td);
1740 }
1741
1742 static
1743 void ctf_set_context(struct trace_descriptor *descriptor,
1744 struct bt_context *ctx)
1745 {
1746 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
1747 parent);
1748
1749 td->ctx = ctx;
1750 }
1751
1752 static
1753 void ctf_set_handle(struct trace_descriptor *descriptor,
1754 struct bt_trace_handle *handle)
1755 {
1756 struct ctf_trace *td = container_of(descriptor, struct ctf_trace,
1757 parent);
1758
1759 td->handle = handle;
1760 }
1761
1762 void __attribute__((constructor)) ctf_init(void)
1763 {
1764 int ret;
1765
1766 ctf_format.name = g_quark_from_static_string("ctf");
1767 ret = bt_register_format(&ctf_format);
1768 assert(!ret);
1769 }
1770
1771 /* TODO: finalize */
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