2 * BabelTrace - Common Trace Format (CTF)
6 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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:
17 * The above copyright notice and this permission notice shall be included in
18 * all copies or substantial portions of the Software.
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
29 #include <babeltrace/format.h>
30 #include <babeltrace/ctf/types.h>
31 #include <babeltrace/ctf/metadata.h>
32 #include <babeltrace/babeltrace-internal.h>
33 #include <babeltrace/ctf/events-internal.h>
34 #include <babeltrace/trace-handle-internal.h>
35 #include <babeltrace/context-internal.h>
36 #include <babeltrace/uuid.h>
37 #include <babeltrace/endian.h>
42 #include <sys/types.h>
50 #include "metadata/ctf-scanner.h"
51 #include "metadata/ctf-parser.h"
52 #include "metadata/ctf-ast.h"
53 #include "events-private.h"
54 #include "memstream.h"
57 * We currently simply map a page to read the packet header and packet
58 * context to get the packet length and content length. (in bits)
60 #define MAX_PACKET_HEADER_LEN (getpagesize() * CHAR_BIT)
61 #define WRITE_PACKET_LEN (getpagesize() * 8 * CHAR_BIT)
64 #define min(a, b) (((a) < (b)) ? (a) : (b))
67 #define NSEC_PER_SEC 1000000000ULL
74 uint64_t opt_clock_offset
;
79 struct bt_trace_descriptor
*ctf_open_trace(const char *path
, int flags
,
80 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
84 struct bt_trace_descriptor
*ctf_open_mmap_trace(
85 struct bt_mmap_stream_list
*mmap_list
,
86 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
90 void ctf_set_context(struct bt_trace_descriptor
*descriptor
,
91 struct bt_context
*ctx
);
93 void ctf_set_handle(struct bt_trace_descriptor
*descriptor
,
94 struct bt_trace_handle
*handle
);
97 int ctf_close_trace(struct bt_trace_descriptor
*descriptor
);
99 uint64_t ctf_timestamp_begin(struct bt_trace_descriptor
*descriptor
,
100 struct bt_trace_handle
*handle
, enum bt_clock_type type
);
102 uint64_t ctf_timestamp_end(struct bt_trace_descriptor
*descriptor
,
103 struct bt_trace_handle
*handle
, enum bt_clock_type type
);
105 int ctf_convert_index_timestamp(struct bt_trace_descriptor
*tdp
);
108 rw_dispatch read_dispatch_table
[] = {
109 [ CTF_TYPE_INTEGER
] = ctf_integer_read
,
110 [ CTF_TYPE_FLOAT
] = ctf_float_read
,
111 [ CTF_TYPE_ENUM
] = ctf_enum_read
,
112 [ CTF_TYPE_STRING
] = ctf_string_read
,
113 [ CTF_TYPE_STRUCT
] = ctf_struct_rw
,
114 [ CTF_TYPE_VARIANT
] = ctf_variant_rw
,
115 [ CTF_TYPE_ARRAY
] = ctf_array_read
,
116 [ CTF_TYPE_SEQUENCE
] = ctf_sequence_read
,
120 rw_dispatch write_dispatch_table
[] = {
121 [ CTF_TYPE_INTEGER
] = ctf_integer_write
,
122 [ CTF_TYPE_FLOAT
] = ctf_float_write
,
123 [ CTF_TYPE_ENUM
] = ctf_enum_write
,
124 [ CTF_TYPE_STRING
] = ctf_string_write
,
125 [ CTF_TYPE_STRUCT
] = ctf_struct_rw
,
126 [ CTF_TYPE_VARIANT
] = ctf_variant_rw
,
127 [ CTF_TYPE_ARRAY
] = ctf_array_write
,
128 [ CTF_TYPE_SEQUENCE
] = ctf_sequence_write
,
132 struct bt_format ctf_format
= {
133 .open_trace
= ctf_open_trace
,
134 .open_mmap_trace
= ctf_open_mmap_trace
,
135 .close_trace
= ctf_close_trace
,
136 .set_context
= ctf_set_context
,
137 .set_handle
= ctf_set_handle
,
138 .timestamp_begin
= ctf_timestamp_begin
,
139 .timestamp_end
= ctf_timestamp_end
,
140 .convert_index_timestamp
= ctf_convert_index_timestamp
,
144 uint64_t ctf_timestamp_begin(struct bt_trace_descriptor
*descriptor
,
145 struct bt_trace_handle
*handle
, enum bt_clock_type type
)
147 struct ctf_trace
*tin
;
148 uint64_t begin
= ULLONG_MAX
;
151 tin
= container_of(descriptor
, struct ctf_trace
, parent
);
156 /* for each stream_class */
157 for (i
= 0; i
< tin
->streams
->len
; i
++) {
158 struct ctf_stream_declaration
*stream_class
;
160 stream_class
= g_ptr_array_index(tin
->streams
, i
);
163 /* for each file_stream */
164 for (j
= 0; j
< stream_class
->streams
->len
; j
++) {
165 struct ctf_stream_definition
*stream
;
166 struct ctf_file_stream
*cfs
;
167 struct ctf_stream_pos
*stream_pos
;
168 struct packet_index
*index
;
170 stream
= g_ptr_array_index(stream_class
->streams
, j
);
171 cfs
= container_of(stream
, struct ctf_file_stream
,
173 stream_pos
= &cfs
->pos
;
175 if (!stream_pos
->packet_real_index
)
178 if (stream_pos
->packet_real_index
->len
<= 0)
181 if (type
== BT_CLOCK_REAL
) {
182 index
= &g_array_index(stream_pos
->packet_real_index
,
184 stream_pos
->packet_real_index
->len
- 1);
185 } else if (type
== BT_CLOCK_CYCLES
) {
186 index
= &g_array_index(stream_pos
->packet_cycles_index
,
188 stream_pos
->packet_real_index
->len
- 1);
193 if (index
->timestamp_begin
< begin
)
194 begin
= index
->timestamp_begin
;
205 uint64_t ctf_timestamp_end(struct bt_trace_descriptor
*descriptor
,
206 struct bt_trace_handle
*handle
, enum bt_clock_type type
)
208 struct ctf_trace
*tin
;
212 tin
= container_of(descriptor
, struct ctf_trace
, parent
);
217 /* for each stream_class */
218 for (i
= 0; i
< tin
->streams
->len
; i
++) {
219 struct ctf_stream_declaration
*stream_class
;
221 stream_class
= g_ptr_array_index(tin
->streams
, i
);
224 /* for each file_stream */
225 for (j
= 0; j
< stream_class
->streams
->len
; j
++) {
226 struct ctf_stream_definition
*stream
;
227 struct ctf_file_stream
*cfs
;
228 struct ctf_stream_pos
*stream_pos
;
229 struct packet_index
*index
;
231 stream
= g_ptr_array_index(stream_class
->streams
, j
);
232 cfs
= container_of(stream
, struct ctf_file_stream
,
234 stream_pos
= &cfs
->pos
;
236 if (!stream_pos
->packet_real_index
)
239 if (stream_pos
->packet_real_index
->len
<= 0)
242 if (type
== BT_CLOCK_REAL
) {
243 index
= &g_array_index(stream_pos
->packet_real_index
,
245 stream_pos
->packet_real_index
->len
- 1);
246 } else if (type
== BT_CLOCK_CYCLES
) {
247 index
= &g_array_index(stream_pos
->packet_cycles_index
,
249 stream_pos
->packet_real_index
->len
- 1);
254 if (index
->timestamp_end
> end
)
255 end
= index
->timestamp_end
;
266 * Update stream current timestamp
269 void ctf_update_timestamp(struct ctf_stream_definition
*stream
,
270 struct definition_integer
*integer_definition
)
272 struct declaration_integer
*integer_declaration
=
273 integer_definition
->declaration
;
274 uint64_t oldval
, newval
, updateval
;
276 if (unlikely(integer_declaration
->len
== 64)) {
277 stream
->prev_cycles_timestamp
= stream
->cycles_timestamp
;
278 stream
->cycles_timestamp
= integer_definition
->value
._unsigned
;
279 stream
->prev_real_timestamp
= ctf_get_real_timestamp(stream
,
280 stream
->prev_cycles_timestamp
);
281 stream
->real_timestamp
= ctf_get_real_timestamp(stream
,
282 stream
->cycles_timestamp
);
286 oldval
= stream
->cycles_timestamp
;
287 oldval
&= (1ULL << integer_declaration
->len
) - 1;
288 newval
= integer_definition
->value
._unsigned
;
289 /* Test for overflow by comparing low bits */
291 newval
+= 1ULL << integer_declaration
->len
;
292 /* updateval contains old high bits, and new low bits (sum) */
293 updateval
= stream
->cycles_timestamp
;
294 updateval
&= ~((1ULL << integer_declaration
->len
) - 1);
296 stream
->prev_cycles_timestamp
= stream
->cycles_timestamp
;
297 stream
->cycles_timestamp
= updateval
;
299 /* convert to real timestamp */
300 stream
->prev_real_timestamp
= ctf_get_real_timestamp(stream
,
301 stream
->prev_cycles_timestamp
);
302 stream
->real_timestamp
= ctf_get_real_timestamp(stream
,
303 stream
->cycles_timestamp
);
307 * Print timestamp, rescaling clock frequency to nanoseconds and
308 * applying offsets as needed (unix time).
311 void ctf_print_timestamp_real(FILE *fp
,
312 struct ctf_stream_definition
*stream
,
315 uint64_t ts_sec
= 0, ts_nsec
;
319 /* Add command-line offset */
320 ts_sec
+= opt_clock_offset
;
322 ts_sec
+= ts_nsec
/ NSEC_PER_SEC
;
323 ts_nsec
= ts_nsec
% NSEC_PER_SEC
;
325 if (!opt_clock_seconds
) {
327 time_t time_s
= (time_t) ts_sec
;
329 if (!opt_clock_gmt
) {
332 res
= localtime_r(&time_s
, &tm
);
334 fprintf(stderr
, "[warning] Unable to get localtime.\n");
340 res
= gmtime_r(&time_s
, &tm
);
342 fprintf(stderr
, "[warning] Unable to get gmtime.\n");
346 if (opt_clock_date
) {
350 /* Print date and time */
351 res
= strftime(timestr
, sizeof(timestr
),
354 fprintf(stderr
, "[warning] Unable to print ascii time.\n");
357 fprintf(fp
, "%s", timestr
);
359 /* Print time in HH:MM:SS.ns */
360 fprintf(fp
, "%02d:%02d:%02d.%09" PRIu64
,
361 tm
.tm_hour
, tm
.tm_min
, tm
.tm_sec
, ts_nsec
);
365 fprintf(fp
, "%3" PRIu64
".%09" PRIu64
,
373 * Print timestamp, in cycles
376 void ctf_print_timestamp_cycles(FILE *fp
,
377 struct ctf_stream_definition
*stream
,
380 fprintf(fp
, "%020" PRIu64
, timestamp
);
383 void ctf_print_timestamp(FILE *fp
,
384 struct ctf_stream_definition
*stream
,
387 if (opt_clock_cycles
) {
388 ctf_print_timestamp_cycles(fp
, stream
, timestamp
);
390 ctf_print_timestamp_real(fp
, stream
, timestamp
);
395 void print_uuid(FILE *fp
, unsigned char *uuid
)
399 for (i
= 0; i
< BABELTRACE_UUID_LEN
; i
++)
400 fprintf(fp
, "%x", (unsigned int) uuid
[i
]);
403 void ctf_print_discarded(FILE *fp
, struct ctf_stream_definition
*stream
)
405 fprintf(fp
, "[warning] Tracer discarded %" PRIu64
" events between [",
406 stream
->events_discarded
);
407 if (opt_clock_cycles
) {
408 ctf_print_timestamp(fp
, stream
,
409 stream
->prev_cycles_timestamp
);
410 fprintf(fp
, "] and [");
411 ctf_print_timestamp(fp
, stream
,
412 stream
->prev_cycles_timestamp_end
);
414 ctf_print_timestamp(fp
, stream
,
415 stream
->prev_real_timestamp
);
416 fprintf(fp
, "] and [");
417 ctf_print_timestamp(fp
, stream
,
418 stream
->prev_real_timestamp_end
);
420 fprintf(fp
, "] in trace UUID ");
421 print_uuid(fp
, stream
->stream_class
->trace
->uuid
);
422 if (stream
->stream_class
->trace
->path
[0])
423 fprintf(fp
, ", at path: \"%s\"",
424 stream
->stream_class
->trace
->path
);
426 fprintf(fp
, ", within stream id %" PRIu64
, stream
->stream_id
);
428 fprintf(fp
, ", at relative path: \"%s\"", stream
->path
);
430 fprintf(fp
, "You should consider recording a new trace with larger "
431 "buffers or with fewer events enabled.\n");
436 int ctf_read_event(struct bt_stream_pos
*ppos
, struct ctf_stream_definition
*stream
)
438 struct ctf_stream_pos
*pos
=
439 container_of(ppos
, struct ctf_stream_pos
, parent
);
440 struct ctf_stream_declaration
*stream_class
= stream
->stream_class
;
441 struct ctf_event_definition
*event
;
445 /* We need to check for EOF here for empty files. */
446 if (unlikely(pos
->offset
== EOF
))
449 ctf_pos_get_event(pos
);
451 /* save the current position as a restore point */
452 pos
->last_offset
= pos
->offset
;
455 * This is the EOF check after we've advanced the position in
458 if (unlikely(pos
->offset
== EOF
))
460 assert(pos
->offset
< pos
->content_size
);
462 /* Read event header */
463 if (likely(stream
->stream_event_header
)) {
464 struct definition_integer
*integer_definition
;
465 struct bt_definition
*variant
;
467 ret
= generic_rw(ppos
, &stream
->stream_event_header
->p
);
470 /* lookup event id */
471 integer_definition
= bt_lookup_integer(&stream
->stream_event_header
->p
, "id", FALSE
);
472 if (integer_definition
) {
473 id
= integer_definition
->value
._unsigned
;
475 struct definition_enum
*enum_definition
;
477 enum_definition
= bt_lookup_enum(&stream
->stream_event_header
->p
, "id", FALSE
);
478 if (enum_definition
) {
479 id
= enum_definition
->integer
->value
._unsigned
;
483 variant
= bt_lookup_variant(&stream
->stream_event_header
->p
, "v");
485 integer_definition
= bt_lookup_integer(variant
, "id", FALSE
);
486 if (integer_definition
) {
487 id
= integer_definition
->value
._unsigned
;
490 stream
->event_id
= id
;
492 /* lookup timestamp */
493 stream
->has_timestamp
= 0;
494 integer_definition
= bt_lookup_integer(&stream
->stream_event_header
->p
, "timestamp", FALSE
);
495 if (integer_definition
) {
496 ctf_update_timestamp(stream
, integer_definition
);
497 stream
->has_timestamp
= 1;
500 integer_definition
= bt_lookup_integer(variant
, "timestamp", FALSE
);
501 if (integer_definition
) {
502 ctf_update_timestamp(stream
, integer_definition
);
503 stream
->has_timestamp
= 1;
509 /* Read stream-declared event context */
510 if (stream
->stream_event_context
) {
511 ret
= generic_rw(ppos
, &stream
->stream_event_context
->p
);
516 if (unlikely(id
>= stream_class
->events_by_id
->len
)) {
517 fprintf(stderr
, "[error] Event id %" PRIu64
" is outside range.\n", id
);
520 event
= g_ptr_array_index(stream
->events_by_id
, id
);
521 if (unlikely(!event
)) {
522 fprintf(stderr
, "[error] Event id %" PRIu64
" is unknown.\n", id
);
526 /* Read event-declared event context */
527 if (event
->event_context
) {
528 ret
= generic_rw(ppos
, &event
->event_context
->p
);
533 /* Read event payload */
534 if (likely(event
->event_fields
)) {
535 ret
= generic_rw(ppos
, &event
->event_fields
->p
);
543 fprintf(stderr
, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
548 int ctf_write_event(struct bt_stream_pos
*pos
, struct ctf_stream_definition
*stream
)
550 struct ctf_stream_declaration
*stream_class
= stream
->stream_class
;
551 struct ctf_event_definition
*event
;
555 id
= stream
->event_id
;
557 /* print event header */
558 if (likely(stream
->stream_event_header
)) {
559 ret
= generic_rw(pos
, &stream
->stream_event_header
->p
);
564 /* print stream-declared event context */
565 if (stream
->stream_event_context
) {
566 ret
= generic_rw(pos
, &stream
->stream_event_context
->p
);
571 if (unlikely(id
>= stream_class
->events_by_id
->len
)) {
572 fprintf(stderr
, "[error] Event id %" PRIu64
" is outside range.\n", id
);
575 event
= g_ptr_array_index(stream
->events_by_id
, id
);
576 if (unlikely(!event
)) {
577 fprintf(stderr
, "[error] Event id %" PRIu64
" is unknown.\n", id
);
581 /* print event-declared event context */
582 if (event
->event_context
) {
583 ret
= generic_rw(pos
, &event
->event_context
->p
);
588 /* Read and print event payload */
589 if (likely(event
->event_fields
)) {
590 ret
= generic_rw(pos
, &event
->event_fields
->p
);
598 fprintf(stderr
, "[error] Unexpected end of stream. Either the trace data stream is corrupted or metadata description does not match data layout.\n");
602 int ctf_init_pos(struct ctf_stream_pos
*pos
, int fd
, int open_flags
)
606 pos
->packet_cycles_index
= g_array_new(FALSE
, TRUE
,
607 sizeof(struct packet_index
));
608 pos
->packet_real_index
= g_array_new(FALSE
, TRUE
,
609 sizeof(struct packet_index
));
611 pos
->packet_cycles_index
= NULL
;
612 pos
->packet_real_index
= NULL
;
614 switch (open_flags
& O_ACCMODE
) {
616 pos
->prot
= PROT_READ
;
617 pos
->flags
= MAP_PRIVATE
;
618 pos
->parent
.rw_table
= read_dispatch_table
;
619 pos
->parent
.event_cb
= ctf_read_event
;
622 pos
->prot
= PROT_WRITE
; /* Write has priority */
623 pos
->flags
= MAP_SHARED
;
624 pos
->parent
.rw_table
= write_dispatch_table
;
625 pos
->parent
.event_cb
= ctf_write_event
;
627 ctf_packet_seek(&pos
->parent
, 0, SEEK_SET
); /* position for write */
635 int ctf_fini_pos(struct ctf_stream_pos
*pos
)
637 if (pos
->prot
== PROT_WRITE
&& pos
->content_size_loc
)
638 *pos
->content_size_loc
= pos
->offset
;
643 ret
= munmap_align(pos
->base_mma
);
645 fprintf(stderr
, "[error] Unable to unmap old base: %s.\n",
650 if (pos
->packet_cycles_index
)
651 (void) g_array_free(pos
->packet_cycles_index
, TRUE
);
652 if (pos
->packet_real_index
)
653 (void) g_array_free(pos
->packet_real_index
, TRUE
);
658 * for SEEK_CUR: go to next packet.
659 * for SEEK_POS: go to packet numer (index).
661 void ctf_packet_seek(struct bt_stream_pos
*stream_pos
, size_t index
, int whence
)
663 struct ctf_stream_pos
*pos
=
664 container_of(stream_pos
, struct ctf_stream_pos
, parent
);
665 struct ctf_file_stream
*file_stream
=
666 container_of(pos
, struct ctf_file_stream
, pos
);
669 struct packet_index
*packet_index
;
671 if (pos
->prot
== PROT_WRITE
&& pos
->content_size_loc
)
672 *pos
->content_size_loc
= pos
->offset
;
676 ret
= munmap_align(pos
->base_mma
);
678 fprintf(stderr
, "[error] Unable to unmap old base: %s.\n",
682 pos
->base_mma
= NULL
;
686 * The caller should never ask for ctf_move_pos across packets,
687 * except to get exactly at the beginning of the next packet.
689 if (pos
->prot
== PROT_WRITE
) {
692 /* The writer will add padding */
693 pos
->mmap_offset
+= WRITE_PACKET_LEN
/ CHAR_BIT
;
696 assert(index
== 0); /* only seek supported for now */
702 pos
->content_size
= -1U; /* Unknown at this point */
703 pos
->packet_size
= WRITE_PACKET_LEN
;
704 off
= posix_fallocate(pos
->fd
, pos
->mmap_offset
,
705 pos
->packet_size
/ CHAR_BIT
);
713 uint64_t events_discarded_diff
;
715 if (pos
->offset
== EOF
) {
718 /* For printing discarded event count */
719 packet_index
= &g_array_index(pos
->packet_cycles_index
,
720 struct packet_index
, pos
->cur_index
);
721 file_stream
->parent
.prev_cycles_timestamp_end
=
722 packet_index
->timestamp_end
;
723 file_stream
->parent
.prev_cycles_timestamp
=
724 packet_index
->timestamp_begin
;
726 packet_index
= &g_array_index(pos
->packet_real_index
,
727 struct packet_index
, pos
->cur_index
);
728 file_stream
->parent
.prev_real_timestamp_end
=
729 packet_index
->timestamp_end
;
730 file_stream
->parent
.prev_real_timestamp
=
731 packet_index
->timestamp_begin
;
733 events_discarded_diff
= packet_index
->events_discarded
;
734 if (pos
->cur_index
> 0) {
735 packet_index
= &g_array_index(pos
->packet_real_index
,
738 events_discarded_diff
-= packet_index
->events_discarded
;
740 * Deal with 32-bit wrap-around if the
741 * tracer provided a 32-bit field.
743 if (packet_index
->events_discarded_len
== 32) {
744 events_discarded_diff
= (uint32_t) events_discarded_diff
;
747 file_stream
->parent
.events_discarded
= events_discarded_diff
;
748 file_stream
->parent
.prev_real_timestamp
= file_stream
->parent
.real_timestamp
;
749 file_stream
->parent
.prev_cycles_timestamp
= file_stream
->parent
.cycles_timestamp
;
750 /* The reader will expect us to skip padding */
755 packet_index
= &g_array_index(pos
->packet_cycles_index
,
756 struct packet_index
, index
);
757 pos
->last_events_discarded
= packet_index
->events_discarded
;
758 pos
->cur_index
= index
;
759 file_stream
->parent
.prev_real_timestamp
= 0;
760 file_stream
->parent
.prev_real_timestamp_end
= 0;
761 file_stream
->parent
.prev_cycles_timestamp
= 0;
762 file_stream
->parent
.prev_cycles_timestamp_end
= 0;
767 if (pos
->cur_index
>= pos
->packet_real_index
->len
) {
769 * We need to check if we are in trace read or
770 * called from packet indexing. In this last
771 * case, the collection is not there, so we
772 * cannot print the timestamps.
774 if ((&file_stream
->parent
)->stream_class
->trace
->collection
) {
776 * When a stream reaches the end of the
777 * file, we need to show the number of
778 * events discarded ourselves, because
779 * there is no next event scheduled to
780 * be printed in the output.
782 if (file_stream
->parent
.events_discarded
) {
784 ctf_print_discarded(stderr
, &file_stream
->parent
);
785 file_stream
->parent
.events_discarded
= 0;
791 packet_index
= &g_array_index(pos
->packet_cycles_index
,
794 file_stream
->parent
.cycles_timestamp
= packet_index
->timestamp_begin
;
796 packet_index
= &g_array_index(pos
->packet_real_index
,
799 file_stream
->parent
.real_timestamp
= packet_index
->timestamp_begin
;
800 pos
->mmap_offset
= packet_index
->offset
;
802 /* Lookup context/packet size in index */
803 pos
->content_size
= packet_index
->content_size
;
804 pos
->packet_size
= packet_index
->packet_size
;
805 if (packet_index
->data_offset
< packet_index
->content_size
) {
806 pos
->offset
= 0; /* will read headers */
807 } else if (packet_index
->data_offset
== packet_index
->content_size
) {
809 pos
->offset
= packet_index
->data_offset
;
811 goto read_next_packet
;
817 /* map new base. Need mapping length from header. */
818 pos
->base_mma
= mmap_align(pos
->packet_size
/ CHAR_BIT
, pos
->prot
,
819 pos
->flags
, pos
->fd
, pos
->mmap_offset
);
820 if (pos
->base_mma
== MAP_FAILED
) {
821 fprintf(stderr
, "[error] mmap error %s.\n",
826 /* update trace_packet_header and stream_packet_context */
827 if (pos
->prot
!= PROT_WRITE
&& file_stream
->parent
.trace_packet_header
) {
828 /* Read packet header */
829 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.trace_packet_header
->p
);
832 if (pos
->prot
!= PROT_WRITE
&& file_stream
->parent
.stream_packet_context
) {
833 /* Read packet context */
834 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.stream_packet_context
->p
);
840 int packet_metadata(struct ctf_trace
*td
, FILE *fp
)
846 len
= fread(&magic
, sizeof(magic
), 1, fp
);
850 if (magic
== TSDL_MAGIC
) {
852 td
->byte_order
= BYTE_ORDER
;
853 CTF_TRACE_SET_FIELD(td
, byte_order
);
854 } else if (magic
== GUINT32_SWAP_LE_BE(TSDL_MAGIC
)) {
856 td
->byte_order
= (BYTE_ORDER
== BIG_ENDIAN
) ?
857 LITTLE_ENDIAN
: BIG_ENDIAN
;
858 CTF_TRACE_SET_FIELD(td
, byte_order
);
866 * Returns 0 on success, -1 on error.
869 int check_version(unsigned int major
, unsigned int minor
)
884 /* eventually return an error instead of warning */
886 fprintf(stderr
, "[warning] Unsupported CTF specification version %u.%u. Trying anyway.\n",
892 int ctf_open_trace_metadata_packet_read(struct ctf_trace
*td
, FILE *in
,
895 struct metadata_packet_header header
;
896 size_t readlen
, writelen
, toread
;
897 char buf
[4096 + 1]; /* + 1 for debug-mode \0 */
900 readlen
= fread(&header
, header_sizeof(header
), 1, in
);
904 if (td
->byte_order
!= BYTE_ORDER
) {
905 header
.magic
= GUINT32_SWAP_LE_BE(header
.magic
);
906 header
.checksum
= GUINT32_SWAP_LE_BE(header
.checksum
);
907 header
.content_size
= GUINT32_SWAP_LE_BE(header
.content_size
);
908 header
.packet_size
= GUINT32_SWAP_LE_BE(header
.packet_size
);
911 fprintf(stderr
, "[warning] checksum verification not supported yet.\n");
912 if (header
.compression_scheme
) {
913 fprintf(stderr
, "[error] compression (%u) not supported yet.\n",
914 header
.compression_scheme
);
917 if (header
.encryption_scheme
) {
918 fprintf(stderr
, "[error] encryption (%u) not supported yet.\n",
919 header
.encryption_scheme
);
922 if (header
.checksum_scheme
) {
923 fprintf(stderr
, "[error] checksum (%u) not supported yet.\n",
924 header
.checksum_scheme
);
927 if (check_version(header
.major
, header
.minor
) < 0)
929 if (!CTF_TRACE_FIELD_IS_SET(td
, uuid
)) {
930 memcpy(td
->uuid
, header
.uuid
, sizeof(header
.uuid
));
931 CTF_TRACE_SET_FIELD(td
, uuid
);
933 if (babeltrace_uuid_compare(header
.uuid
, td
->uuid
))
937 if ((header
.content_size
/ CHAR_BIT
) < header_sizeof(header
))
940 toread
= (header
.content_size
/ CHAR_BIT
) - header_sizeof(header
);
943 readlen
= fread(buf
, sizeof(char), min(sizeof(buf
) - 1, toread
), in
);
948 if (babeltrace_debug
) {
950 fprintf(stderr
, "[debug] metadata packet read: %s\n",
954 writelen
= fwrite(buf
, sizeof(char), readlen
, out
);
955 if (writelen
< readlen
) {
965 ret
= 0; /* continue reading next packet */
972 toread
= (header
.packet_size
- header
.content_size
) / CHAR_BIT
;
973 ret
= fseek(in
, toread
, SEEK_CUR
);
975 fprintf(stderr
, "[warning] Missing padding at end of file\n");
982 int ctf_open_trace_metadata_stream_read(struct ctf_trace
*td
, FILE **fp
,
991 * Using strlen on *buf instead of size of open_memstream
992 * because its size includes garbage at the end (after final
993 * \0). This is the allocated size, not the actual string size.
995 out
= babeltrace_open_memstream(buf
, &size
);
997 perror("Metadata open_memstream");
1001 ret
= ctf_open_trace_metadata_packet_read(td
, in
, out
);
1010 /* close to flush the buffer */
1011 ret
= babeltrace_close_memstream(buf
, &size
, out
);
1015 perror("babeltrace_flush_memstream");
1017 closeret
= fclose(in
);
1019 perror("Error in fclose");
1025 perror("Error in fclose");
1027 /* open for reading */
1028 buflen
= strlen(*buf
);
1033 *fp
= babeltrace_fmemopen(*buf
, buflen
, "rb");
1035 perror("Metadata fmemopen");
1042 int ctf_open_trace_metadata_read(struct ctf_trace
*td
,
1043 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
1044 int whence
), FILE *metadata_fp
)
1046 struct ctf_scanner
*scanner
;
1047 struct ctf_file_stream
*metadata_stream
;
1050 int ret
= 0, closeret
;
1052 metadata_stream
= g_new0(struct ctf_file_stream
, 1);
1053 metadata_stream
->pos
.last_offset
= LAST_OFFSET_POISON
;
1056 metadata_stream
->pos
.packet_seek
= packet_seek
;
1058 fprintf(stderr
, "[error] packet_seek function undefined.\n");
1065 metadata_stream
->pos
.fd
= -1;
1067 td
->metadata
= &metadata_stream
->parent
;
1068 metadata_stream
->pos
.fd
= openat(td
->dirfd
, "metadata", O_RDONLY
);
1069 if (metadata_stream
->pos
.fd
< 0) {
1070 fprintf(stderr
, "Unable to open metadata.\n");
1075 fp
= fdopen(metadata_stream
->pos
.fd
, "r");
1077 fprintf(stderr
, "[error] Unable to open metadata stream.\n");
1078 perror("Metadata stream open");
1082 /* fd now belongs to fp */
1083 metadata_stream
->pos
.fd
= -1;
1085 if (babeltrace_debug
)
1088 if (packet_metadata(td
, fp
)) {
1089 ret
= ctf_open_trace_metadata_stream_read(td
, &fp
, &buf
);
1091 /* Warn about empty metadata */
1092 fprintf(stderr
, "[warning] Empty metadata.\n");
1093 goto end_packet_read
;
1096 unsigned int major
, minor
;
1099 td
->byte_order
= BYTE_ORDER
;
1101 /* Check text-only metadata header and version */
1102 nr_items
= fscanf(fp
, "/* CTF %u.%u", &major
, &minor
);
1104 fprintf(stderr
, "[warning] Ill-shapen or missing \"/* CTF x.y\" header for text-only metadata.\n");
1105 if (check_version(major
, minor
) < 0) {
1107 goto end_packet_read
;
1112 scanner
= ctf_scanner_alloc(fp
);
1114 fprintf(stderr
, "[error] Error allocating scanner\n");
1116 goto end_scanner_alloc
;
1118 ret
= ctf_scanner_append_ast(scanner
);
1120 fprintf(stderr
, "[error] Error creating AST\n");
1124 if (babeltrace_debug
) {
1125 ret
= ctf_visitor_print_xml(stderr
, 0, &scanner
->ast
->root
);
1127 fprintf(stderr
, "[error] Error visiting AST for XML output\n");
1132 ret
= ctf_visitor_semantic_check(stderr
, 0, &scanner
->ast
->root
);
1134 fprintf(stderr
, "[error] Error in CTF semantic validation %d\n", ret
);
1137 ret
= ctf_visitor_construct_metadata(stderr
, 0, &scanner
->ast
->root
,
1138 td
, td
->byte_order
);
1140 fprintf(stderr
, "[error] Error in CTF metadata constructor %d\n", ret
);
1144 ctf_scanner_free(scanner
);
1148 closeret
= fclose(fp
);
1150 perror("Error on fclose");
1155 if (metadata_stream
->pos
.fd
>= 0) {
1156 closeret
= close(metadata_stream
->pos
.fd
);
1158 perror("Error on metadata stream fd close");
1163 g_free(metadata_stream
);
1168 struct ctf_event_definition
*create_event_definitions(struct ctf_trace
*td
,
1169 struct ctf_stream_definition
*stream
,
1170 struct ctf_event_declaration
*event
)
1172 struct ctf_event_definition
*stream_event
= g_new0(struct ctf_event_definition
, 1);
1174 if (event
->context_decl
) {
1175 struct bt_definition
*definition
=
1176 event
->context_decl
->p
.definition_new(&event
->context_decl
->p
,
1177 stream
->parent_def_scope
, 0, 0, "event.context");
1181 stream_event
->event_context
= container_of(definition
,
1182 struct definition_struct
, p
);
1183 stream
->parent_def_scope
= stream_event
->event_context
->p
.scope
;
1185 if (event
->fields_decl
) {
1186 struct bt_definition
*definition
=
1187 event
->fields_decl
->p
.definition_new(&event
->fields_decl
->p
,
1188 stream
->parent_def_scope
, 0, 0, "event.fields");
1192 stream_event
->event_fields
= container_of(definition
,
1193 struct definition_struct
, p
);
1194 stream
->parent_def_scope
= stream_event
->event_fields
->p
.scope
;
1196 stream_event
->stream
= stream
;
1197 return stream_event
;
1200 if (stream_event
->event_fields
)
1201 bt_definition_unref(&stream_event
->event_fields
->p
);
1202 if (stream_event
->event_context
)
1203 bt_definition_unref(&stream_event
->event_context
->p
);
1208 int create_stream_definitions(struct ctf_trace
*td
, struct ctf_stream_definition
*stream
)
1210 struct ctf_stream_declaration
*stream_class
;
1214 if (stream
->stream_definitions_created
)
1217 stream_class
= stream
->stream_class
;
1219 if (stream_class
->packet_context_decl
) {
1220 struct bt_definition
*definition
=
1221 stream_class
->packet_context_decl
->p
.definition_new(&stream_class
->packet_context_decl
->p
,
1222 stream
->parent_def_scope
, 0, 0, "stream.packet.context");
1227 stream
->stream_packet_context
= container_of(definition
,
1228 struct definition_struct
, p
);
1229 stream
->parent_def_scope
= stream
->stream_packet_context
->p
.scope
;
1231 if (stream_class
->event_header_decl
) {
1232 struct bt_definition
*definition
=
1233 stream_class
->event_header_decl
->p
.definition_new(&stream_class
->event_header_decl
->p
,
1234 stream
->parent_def_scope
, 0, 0, "stream.event.header");
1239 stream
->stream_event_header
=
1240 container_of(definition
, struct definition_struct
, p
);
1241 stream
->parent_def_scope
= stream
->stream_event_header
->p
.scope
;
1243 if (stream_class
->event_context_decl
) {
1244 struct bt_definition
*definition
=
1245 stream_class
->event_context_decl
->p
.definition_new(&stream_class
->event_context_decl
->p
,
1246 stream
->parent_def_scope
, 0, 0, "stream.event.context");
1251 stream
->stream_event_context
=
1252 container_of(definition
, struct definition_struct
, p
);
1253 stream
->parent_def_scope
= stream
->stream_event_context
->p
.scope
;
1255 stream
->events_by_id
= g_ptr_array_new();
1256 g_ptr_array_set_size(stream
->events_by_id
, stream_class
->events_by_id
->len
);
1257 for (i
= 0; i
< stream
->events_by_id
->len
; i
++) {
1258 struct ctf_event_declaration
*event
= g_ptr_array_index(stream_class
->events_by_id
, i
);
1259 struct ctf_event_definition
*stream_event
;
1263 stream_event
= create_event_definitions(td
, stream
, event
);
1266 g_ptr_array_index(stream
->events_by_id
, i
) = stream_event
;
1271 for (i
= 0; i
< stream
->events_by_id
->len
; i
++) {
1272 struct ctf_event_definition
*stream_event
= g_ptr_array_index(stream
->events_by_id
, i
);
1274 g_free(stream_event
);
1276 g_ptr_array_free(stream
->events_by_id
, TRUE
);
1278 if (stream
->stream_event_context
)
1279 bt_definition_unref(&stream
->stream_event_context
->p
);
1280 if (stream
->stream_event_header
)
1281 bt_definition_unref(&stream
->stream_event_header
->p
);
1282 if (stream
->stream_packet_context
)
1283 bt_definition_unref(&stream
->stream_packet_context
->p
);
1289 int create_stream_packet_index(struct ctf_trace
*td
,
1290 struct ctf_file_stream
*file_stream
)
1292 struct ctf_stream_declaration
*stream
;
1294 struct ctf_stream_pos
*pos
;
1295 struct stat filestats
;
1296 struct packet_index packet_index
;
1297 int first_packet
= 1;
1300 pos
= &file_stream
->pos
;
1302 ret
= fstat(pos
->fd
, &filestats
);
1306 if (filestats
.st_size
< MAX_PACKET_HEADER_LEN
/ CHAR_BIT
)
1309 for (pos
->mmap_offset
= 0; pos
->mmap_offset
< filestats
.st_size
; ) {
1310 uint64_t stream_id
= 0;
1312 if (pos
->base_mma
) {
1313 /* unmap old base */
1314 ret
= munmap_align(pos
->base_mma
);
1316 fprintf(stderr
, "[error] Unable to unmap old base: %s.\n",
1320 pos
->base_mma
= NULL
;
1322 /* map new base. Need mapping length from header. */
1323 pos
->base_mma
= mmap_align(MAX_PACKET_HEADER_LEN
/ CHAR_BIT
, PROT_READ
,
1324 MAP_PRIVATE
, pos
->fd
, pos
->mmap_offset
);
1325 assert(pos
->base_mma
!= MAP_FAILED
);
1326 pos
->content_size
= MAX_PACKET_HEADER_LEN
; /* Unknown at this point */
1327 pos
->packet_size
= MAX_PACKET_HEADER_LEN
; /* Unknown at this point */
1328 pos
->offset
= 0; /* Position of the packet header */
1330 packet_index
.offset
= pos
->mmap_offset
;
1331 packet_index
.content_size
= 0;
1332 packet_index
.packet_size
= 0;
1333 packet_index
.timestamp_begin
= 0;
1334 packet_index
.timestamp_end
= 0;
1335 packet_index
.events_discarded
= 0;
1336 packet_index
.events_discarded_len
= 0;
1338 /* read and check header, set stream id (and check) */
1339 if (file_stream
->parent
.trace_packet_header
) {
1340 /* Read packet header */
1341 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.trace_packet_header
->p
);
1344 len_index
= bt_struct_declaration_lookup_field_index(file_stream
->parent
.trace_packet_header
->declaration
, g_quark_from_static_string("magic"));
1345 if (len_index
>= 0) {
1346 struct bt_definition
*field
;
1349 field
= bt_struct_definition_get_field_from_index(file_stream
->parent
.trace_packet_header
, len_index
);
1350 magic
= bt_get_unsigned_int(field
);
1351 if (magic
!= CTF_MAGIC
) {
1352 fprintf(stderr
, "[error] Invalid magic number 0x%" PRIX64
" at packet %u (file offset %zd).\n",
1354 file_stream
->pos
.packet_cycles_index
->len
,
1355 (ssize_t
) pos
->mmap_offset
);
1361 len_index
= bt_struct_declaration_lookup_field_index(file_stream
->parent
.trace_packet_header
->declaration
, g_quark_from_static_string("uuid"));
1362 if (len_index
>= 0) {
1363 struct definition_array
*defarray
;
1364 struct bt_definition
*field
;
1366 uint8_t uuidval
[BABELTRACE_UUID_LEN
];
1368 field
= bt_struct_definition_get_field_from_index(file_stream
->parent
.trace_packet_header
, len_index
);
1369 assert(field
->declaration
->id
== CTF_TYPE_ARRAY
);
1370 defarray
= container_of(field
, struct definition_array
, p
);
1371 assert(bt_array_len(defarray
) == BABELTRACE_UUID_LEN
);
1373 for (i
= 0; i
< BABELTRACE_UUID_LEN
; i
++) {
1374 struct bt_definition
*elem
;
1376 elem
= bt_array_index(defarray
, i
);
1377 uuidval
[i
] = bt_get_unsigned_int(elem
);
1379 ret
= babeltrace_uuid_compare(td
->uuid
, uuidval
);
1381 fprintf(stderr
, "[error] Unique Universal Identifiers do not match.\n");
1387 len_index
= bt_struct_declaration_lookup_field_index(file_stream
->parent
.trace_packet_header
->declaration
, g_quark_from_static_string("stream_id"));
1388 if (len_index
>= 0) {
1389 struct bt_definition
*field
;
1391 field
= bt_struct_definition_get_field_from_index(file_stream
->parent
.trace_packet_header
, len_index
);
1392 stream_id
= bt_get_unsigned_int(field
);
1396 if (!first_packet
&& file_stream
->parent
.stream_id
!= stream_id
) {
1397 fprintf(stderr
, "[error] Stream ID is changing within a stream: expecting %" PRIu64
", but packet has %" PRIu64
"\n",
1399 file_stream
->parent
.stream_id
);
1403 file_stream
->parent
.stream_id
= stream_id
;
1404 if (stream_id
>= td
->streams
->len
) {
1405 fprintf(stderr
, "[error] Stream %" PRIu64
" is not declared in metadata.\n", stream_id
);
1408 stream
= g_ptr_array_index(td
->streams
, stream_id
);
1410 fprintf(stderr
, "[error] Stream %" PRIu64
" is not declared in metadata.\n", stream_id
);
1413 file_stream
->parent
.stream_class
= stream
;
1414 ret
= create_stream_definitions(td
, &file_stream
->parent
);
1420 if (file_stream
->parent
.stream_packet_context
) {
1421 /* Read packet context */
1422 ret
= generic_rw(&pos
->parent
, &file_stream
->parent
.stream_packet_context
->p
);
1425 /* read content size from header */
1426 len_index
= bt_struct_declaration_lookup_field_index(file_stream
->parent
.stream_packet_context
->declaration
, g_quark_from_static_string("content_size"));
1427 if (len_index
>= 0) {
1428 struct bt_definition
*field
;
1430 field
= bt_struct_definition_get_field_from_index(file_stream
->parent
.stream_packet_context
, len_index
);
1431 packet_index
.content_size
= bt_get_unsigned_int(field
);
1433 /* Use file size for packet size */
1434 packet_index
.content_size
= filestats
.st_size
* CHAR_BIT
;
1437 /* read packet size from header */
1438 len_index
= bt_struct_declaration_lookup_field_index(file_stream
->parent
.stream_packet_context
->declaration
, g_quark_from_static_string("packet_size"));
1439 if (len_index
>= 0) {
1440 struct bt_definition
*field
;
1442 field
= bt_struct_definition_get_field_from_index(file_stream
->parent
.stream_packet_context
, len_index
);
1443 packet_index
.packet_size
= bt_get_unsigned_int(field
);
1445 /* Use content size if non-zero, else file size */
1446 packet_index
.packet_size
= packet_index
.content_size
? : filestats
.st_size
* CHAR_BIT
;
1449 /* read timestamp begin from header */
1450 len_index
= bt_struct_declaration_lookup_field_index(file_stream
->parent
.stream_packet_context
->declaration
, g_quark_from_static_string("timestamp_begin"));
1451 if (len_index
>= 0) {
1452 struct bt_definition
*field
;
1454 field
= bt_struct_definition_get_field_from_index(file_stream
->parent
.stream_packet_context
, len_index
);
1455 packet_index
.timestamp_begin
= bt_get_unsigned_int(field
);
1456 if (file_stream
->parent
.stream_class
->trace
->collection
) {
1457 packet_index
.timestamp_begin
=
1458 ctf_get_real_timestamp(
1459 &file_stream
->parent
,
1460 packet_index
.timestamp_begin
);
1464 /* read timestamp end from header */
1465 len_index
= bt_struct_declaration_lookup_field_index(file_stream
->parent
.stream_packet_context
->declaration
, g_quark_from_static_string("timestamp_end"));
1466 if (len_index
>= 0) {
1467 struct bt_definition
*field
;
1469 field
= bt_struct_definition_get_field_from_index(file_stream
->parent
.stream_packet_context
, len_index
);
1470 packet_index
.timestamp_end
= bt_get_unsigned_int(field
);
1471 if (file_stream
->parent
.stream_class
->trace
->collection
) {
1472 packet_index
.timestamp_end
=
1473 ctf_get_real_timestamp(
1474 &file_stream
->parent
,
1475 packet_index
.timestamp_end
);
1479 /* read events discarded from header */
1480 len_index
= bt_struct_declaration_lookup_field_index(file_stream
->parent
.stream_packet_context
->declaration
, g_quark_from_static_string("events_discarded"));
1481 if (len_index
>= 0) {
1482 struct bt_definition
*field
;
1484 field
= bt_struct_definition_get_field_from_index(file_stream
->parent
.stream_packet_context
, len_index
);
1485 packet_index
.events_discarded
= bt_get_unsigned_int(field
);
1486 packet_index
.events_discarded_len
= bt_get_int_len(field
);
1489 /* Use file size for packet size */
1490 packet_index
.content_size
= filestats
.st_size
* CHAR_BIT
;
1491 /* Use content size if non-zero, else file size */
1492 packet_index
.packet_size
= packet_index
.content_size
? : filestats
.st_size
* CHAR_BIT
;
1495 /* Validate content size and packet size values */
1496 if (packet_index
.content_size
> packet_index
.packet_size
) {
1497 fprintf(stderr
, "[error] Content size (%" PRIu64
" bits) is larger than packet size (%" PRIu64
" bits).\n",
1498 packet_index
.content_size
, packet_index
.packet_size
);
1502 if (packet_index
.packet_size
> ((uint64_t)filestats
.st_size
- packet_index
.offset
) * CHAR_BIT
) {
1503 fprintf(stderr
, "[error] Packet size (%" PRIu64
" bits) is larger than remaining file size (%" PRIu64
" bits).\n",
1504 packet_index
.packet_size
, ((uint64_t)filestats
.st_size
- packet_index
.offset
) * CHAR_BIT
);
1508 /* Save position after header and context */
1509 packet_index
.data_offset
= pos
->offset
;
1511 /* add index to packet array */
1512 g_array_append_val(file_stream
->pos
.packet_cycles_index
, packet_index
);
1514 pos
->mmap_offset
+= packet_index
.packet_size
/ CHAR_BIT
;
1521 int create_trace_definitions(struct ctf_trace
*td
, struct ctf_stream_definition
*stream
)
1525 if (td
->packet_header_decl
) {
1526 struct bt_definition
*definition
=
1527 td
->packet_header_decl
->p
.definition_new(&td
->packet_header_decl
->p
,
1528 stream
->parent_def_scope
, 0, 0, "trace.packet.header");
1533 stream
->trace_packet_header
=
1534 container_of(definition
, struct definition_struct
, p
);
1535 stream
->parent_def_scope
= stream
->trace_packet_header
->p
.scope
;
1545 * Note: many file streams can inherit from the same stream class
1546 * description (metadata).
1549 int ctf_open_file_stream_read(struct ctf_trace
*td
, const char *path
, int flags
,
1550 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
1553 int ret
, fd
, closeret
;
1554 struct ctf_file_stream
*file_stream
;
1555 struct stat statbuf
;
1557 fd
= openat(td
->dirfd
, path
, flags
);
1559 perror("File stream openat()");
1564 /* Don't try to mmap subdirectories. Skip them, return success. */
1565 ret
= fstat(fd
, &statbuf
);
1567 perror("File stream fstat()");
1570 if (S_ISDIR(statbuf
.st_mode
)) {
1571 fprintf(stderr
, "[warning] Skipping directory '%s' found in trace\n", path
);
1576 file_stream
= g_new0(struct ctf_file_stream
, 1);
1577 file_stream
->pos
.last_offset
= LAST_OFFSET_POISON
;
1579 strncpy(file_stream
->parent
.path
, path
, PATH_MAX
);
1580 file_stream
->parent
.path
[PATH_MAX
- 1] = '\0';
1583 file_stream
->pos
.packet_seek
= packet_seek
;
1585 fprintf(stderr
, "[error] packet_seek function undefined.\n");
1590 ret
= ctf_init_pos(&file_stream
->pos
, fd
, flags
);
1593 ret
= create_trace_definitions(td
, &file_stream
->parent
);
1597 * For now, only a single clock per trace is supported.
1599 file_stream
->parent
.current_clock
= td
->single_clock
;
1600 ret
= create_stream_packet_index(td
, file_stream
);
1603 /* Add stream file to stream class */
1604 g_ptr_array_add(file_stream
->parent
.stream_class
->streams
,
1605 &file_stream
->parent
);
1609 if (file_stream
->parent
.trace_packet_header
)
1610 bt_definition_unref(&file_stream
->parent
.trace_packet_header
->p
);
1612 closeret
= ctf_fini_pos(&file_stream
->pos
);
1614 fprintf(stderr
, "Error on ctf_fini_pos\n");
1616 g_free(file_stream
);
1619 closeret
= close(fd
);
1621 perror("Error on fd close");
1628 int ctf_open_trace_read(struct ctf_trace
*td
,
1629 const char *path
, int flags
,
1630 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
1631 int whence
), FILE *metadata_fp
)
1634 struct dirent
*dirent
;
1635 struct dirent
*diriter
;
1640 /* Open trace directory */
1641 td
->dir
= opendir(path
);
1643 fprintf(stderr
, "[error] Unable to open trace directory \"%s\".\n", path
);
1648 td
->dirfd
= open(path
, 0);
1649 if (td
->dirfd
< 0) {
1650 fprintf(stderr
, "[error] Unable to open trace directory file descriptor for path \"%s\".\n", path
);
1651 perror("Trace directory open");
1655 strncpy(td
->path
, path
, sizeof(td
->path
));
1656 td
->path
[sizeof(td
->path
) - 1] = '\0';
1659 * Keep the metadata file separate.
1662 ret
= ctf_open_trace_metadata_read(td
, packet_seek
, metadata_fp
);
1664 fprintf(stderr
, "[warning] Unable to open trace metadata for path \"%s\".\n", path
);
1665 goto error_metadata
;
1669 * Open each stream: for each file, try to open, check magic
1670 * number, and get the stream ID to add to the right location in
1674 dirent_len
= offsetof(struct dirent
, d_name
) +
1675 fpathconf(td
->dirfd
, _PC_NAME_MAX
) + 1;
1677 dirent
= malloc(dirent_len
);
1680 ret
= readdir_r(td
->dir
, dirent
, &diriter
);
1682 fprintf(stderr
, "[error] Readdir error.\n");
1687 /* Ignore hidden files, ., .. and metadata. */
1688 if (!strncmp(diriter
->d_name
, ".", 1)
1689 || !strcmp(diriter
->d_name
, "..")
1690 || !strcmp(diriter
->d_name
, "metadata"))
1692 ret
= ctf_open_file_stream_read(td
, diriter
->d_name
,
1693 flags
, packet_seek
);
1695 fprintf(stderr
, "[error] Open file stream error.\n");
1706 closeret
= close(td
->dirfd
);
1708 perror("Error on fd close");
1711 closeret
= closedir(td
->dir
);
1713 perror("Error on closedir");
1720 * ctf_open_trace: Open a CTF trace and index it.
1721 * Note that the user must seek the trace after the open (using the iterator)
1722 * since the index creation read it entirely.
1725 struct bt_trace_descriptor
*ctf_open_trace(const char *path
, int flags
,
1726 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
1727 int whence
), FILE *metadata_fp
)
1729 struct ctf_trace
*td
;
1733 * If packet_seek is NULL, we provide our default version.
1736 packet_seek
= ctf_packet_seek
;
1738 td
= g_new0(struct ctf_trace
, 1);
1740 switch (flags
& O_ACCMODE
) {
1743 fprintf(stderr
, "[error] Path missing for input CTF trace.\n");
1746 ret
= ctf_open_trace_read(td
, path
, flags
, packet_seek
, metadata_fp
);
1751 fprintf(stderr
, "[error] Opening CTF traces for output is not supported yet.\n");
1754 fprintf(stderr
, "[error] Incorrect open flags.\n");
1765 void ctf_init_mmap_pos(struct ctf_stream_pos
*pos
,
1766 struct bt_mmap_stream
*mmap_info
)
1768 pos
->mmap_offset
= 0;
1769 pos
->packet_size
= 0;
1770 pos
->content_size
= 0;
1771 pos
->content_size_loc
= NULL
;
1772 pos
->fd
= mmap_info
->fd
;
1773 pos
->base_mma
= NULL
;
1777 pos
->packet_cycles_index
= NULL
;
1778 pos
->packet_real_index
= NULL
;
1779 pos
->prot
= PROT_READ
;
1780 pos
->flags
= MAP_PRIVATE
;
1781 pos
->parent
.rw_table
= read_dispatch_table
;
1782 pos
->parent
.event_cb
= ctf_read_event
;
1786 int prepare_mmap_stream_definition(struct ctf_trace
*td
,
1787 struct ctf_file_stream
*file_stream
)
1789 struct ctf_stream_declaration
*stream
;
1790 uint64_t stream_id
= 0;
1793 file_stream
->parent
.stream_id
= stream_id
;
1794 if (stream_id
>= td
->streams
->len
) {
1795 fprintf(stderr
, "[error] Stream %" PRIu64
" is not declared "
1796 "in metadata.\n", stream_id
);
1800 stream
= g_ptr_array_index(td
->streams
, stream_id
);
1802 fprintf(stderr
, "[error] Stream %" PRIu64
" is not declared "
1803 "in metadata.\n", stream_id
);
1807 file_stream
->parent
.stream_class
= stream
;
1808 ret
= create_stream_definitions(td
, &file_stream
->parent
);
1814 int ctf_open_mmap_stream_read(struct ctf_trace
*td
,
1815 struct bt_mmap_stream
*mmap_info
,
1816 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
1820 struct ctf_file_stream
*file_stream
;
1822 file_stream
= g_new0(struct ctf_file_stream
, 1);
1823 file_stream
->pos
.last_offset
= LAST_OFFSET_POISON
;
1824 ctf_init_mmap_pos(&file_stream
->pos
, mmap_info
);
1826 file_stream
->pos
.packet_seek
= packet_seek
;
1828 ret
= create_trace_definitions(td
, &file_stream
->parent
);
1833 ret
= prepare_mmap_stream_definition(td
, file_stream
);
1838 * For now, only a single clock per trace is supported.
1840 file_stream
->parent
.current_clock
= td
->single_clock
;
1842 /* Add stream file to stream class */
1843 g_ptr_array_add(file_stream
->parent
.stream_class
->streams
,
1844 &file_stream
->parent
);
1848 if (file_stream
->parent
.trace_packet_header
)
1849 bt_definition_unref(&file_stream
->parent
.trace_packet_header
->p
);
1851 g_free(file_stream
);
1856 int ctf_open_mmap_trace_read(struct ctf_trace
*td
,
1857 struct bt_mmap_stream_list
*mmap_list
,
1858 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
1863 struct bt_mmap_stream
*mmap_info
;
1865 ret
= ctf_open_trace_metadata_read(td
, ctf_packet_seek
, metadata_fp
);
1871 * for each stream, try to open, check magic number, and get the
1872 * stream ID to add to the right location in the stream array.
1874 bt_list_for_each_entry(mmap_info
, &mmap_list
->head
, list
) {
1875 ret
= ctf_open_mmap_stream_read(td
, mmap_info
, packet_seek
);
1877 fprintf(stderr
, "[error] Open file mmap stream error.\n");
1889 struct bt_trace_descriptor
*ctf_open_mmap_trace(
1890 struct bt_mmap_stream_list
*mmap_list
,
1891 void (*packet_seek
)(struct bt_stream_pos
*pos
, size_t index
,
1895 struct ctf_trace
*td
;
1899 fprintf(stderr
, "[error] No metadata file pointer associated, "
1900 "required for mmap parsing\n");
1904 fprintf(stderr
, "[error] packet_seek function undefined.\n");
1907 td
= g_new0(struct ctf_trace
, 1);
1908 ret
= ctf_open_mmap_trace_read(td
, mmap_list
, packet_seek
, metadata_fp
);
1921 int ctf_convert_index_timestamp(struct bt_trace_descriptor
*tdp
)
1924 struct ctf_trace
*td
= container_of(tdp
, struct ctf_trace
, parent
);
1926 /* for each stream_class */
1927 for (i
= 0; i
< td
->streams
->len
; i
++) {
1928 struct ctf_stream_declaration
*stream_class
;
1930 stream_class
= g_ptr_array_index(td
->streams
, i
);
1933 /* for each file_stream */
1934 for (j
= 0; j
< stream_class
->streams
->len
; j
++) {
1935 struct ctf_stream_definition
*stream
;
1936 struct ctf_stream_pos
*stream_pos
;
1937 struct ctf_file_stream
*cfs
;
1939 stream
= g_ptr_array_index(stream_class
->streams
, j
);
1942 cfs
= container_of(stream
, struct ctf_file_stream
,
1944 stream_pos
= &cfs
->pos
;
1945 if (!stream_pos
->packet_cycles_index
)
1948 for (k
= 0; k
< stream_pos
->packet_cycles_index
->len
; k
++) {
1949 struct packet_index
*index
;
1950 struct packet_index new_index
;
1952 index
= &g_array_index(stream_pos
->packet_cycles_index
,
1953 struct packet_index
, k
);
1954 memcpy(&new_index
, index
,
1955 sizeof(struct packet_index
));
1956 new_index
.timestamp_begin
=
1957 ctf_get_real_timestamp(stream
,
1958 index
->timestamp_begin
);
1959 new_index
.timestamp_end
=
1960 ctf_get_real_timestamp(stream
,
1961 index
->timestamp_end
);
1962 g_array_append_val(stream_pos
->packet_real_index
,
1971 int ctf_close_file_stream(struct ctf_file_stream
*file_stream
)
1975 ret
= ctf_fini_pos(&file_stream
->pos
);
1977 fprintf(stderr
, "Error on ctf_fini_pos\n");
1980 ret
= close(file_stream
->pos
.fd
);
1982 perror("Error closing file fd");
1989 int ctf_close_trace(struct bt_trace_descriptor
*tdp
)
1991 struct ctf_trace
*td
= container_of(tdp
, struct ctf_trace
, parent
);
1997 for (i
= 0; i
< td
->streams
->len
; i
++) {
1998 struct ctf_stream_declaration
*stream
;
2001 stream
= g_ptr_array_index(td
->streams
, i
);
2004 for (j
= 0; j
< stream
->streams
->len
; j
++) {
2005 struct ctf_file_stream
*file_stream
;
2006 file_stream
= container_of(g_ptr_array_index(stream
->streams
, j
),
2007 struct ctf_file_stream
, parent
);
2008 ret
= ctf_close_file_stream(file_stream
);
2014 ctf_destroy_metadata(td
);
2015 ret
= close(td
->dirfd
);
2017 perror("Error closing dirfd");
2020 ret
= closedir(td
->dir
);
2022 perror("Error closedir");
2030 void ctf_set_context(struct bt_trace_descriptor
*descriptor
,
2031 struct bt_context
*ctx
)
2033 struct ctf_trace
*td
= container_of(descriptor
, struct ctf_trace
,
2040 void ctf_set_handle(struct bt_trace_descriptor
*descriptor
,
2041 struct bt_trace_handle
*handle
)
2043 struct ctf_trace
*td
= container_of(descriptor
, struct ctf_trace
,
2046 td
->handle
= handle
;
2050 void __attribute__((constructor
)) ctf_init(void)
2054 ctf_format
.name
= g_quark_from_static_string("ctf");
2055 ret
= bt_register_format(&ctf_format
);
2060 void __attribute__((destructor
)) ctf_exit(void)
2062 bt_unregister_format(&ctf_format
);