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