2 * Babeltrace - CTF notification iterator
4 * Copyright (c) 2015-2016 EfficiOS Inc. and Linux Foundation
5 * Copyright (c) 2015-2016 Philippe Proulx <pproulx@efficios.com>
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <babeltrace/ctf-ir/field-types.h>
34 #include <babeltrace/ctf-ir/field-path.h>
35 #include <babeltrace/ctf-ir/fields.h>
36 #include <babeltrace/ctf-ir/stream-class.h>
37 #include <babeltrace/ctf-ir/packet.h>
38 #include <babeltrace/ctf-ir/stream.h>
39 #include <babeltrace/ctf-ir/clock.h>
40 #include <babeltrace/ctf-ir/event-class.h>
41 #include <babeltrace/plugin/notification/packet.h>
42 #include <babeltrace/plugin/notification/event.h>
43 #include <babeltrace/ref.h>
46 #define PRINT_ERR_STREAM notit->err_stream
47 #define PRINT_PREFIX "ctf-notif-iter"
50 #include "notif-iter.h"
51 #include "../btr/btr.h"
53 #define BYTES_TO_BITS(x) ((x) * 8)
55 struct bt_ctf_notif_iter
;
57 /* A visit stack entry */
60 * Current base field, one of:
68 * Field is owned by this.
70 struct bt_ctf_field
*base
;
72 /* index of next field to set */
78 /* Entries (struct stack_entry *) (top is last element) */
85 STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN
,
86 STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE
,
87 STATE_AFTER_TRACE_PACKET_HEADER
,
88 STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN
,
89 STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE
,
90 STATE_AFTER_STREAM_PACKET_CONTEXT
,
91 STATE_EMIT_NOTIF_NEW_PACKET
,
92 STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN
,
93 STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE
,
94 STATE_AFTER_STREAM_EVENT_HEADER
,
95 STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN
,
96 STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE
,
97 STATE_DSCOPE_EVENT_CONTEXT_BEGIN
,
98 STATE_DSCOPE_EVENT_CONTEXT_CONTINUE
,
99 STATE_DSCOPE_EVENT_PAYLOAD_BEGIN
,
100 STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE
,
101 STATE_EMIT_NOTIF_EVENT
,
102 STATE_EMIT_NOTIF_END_OF_PACKET
,
103 STATE_SKIP_PACKET_PADDING
,
106 /* CTF notification iterator */
107 struct bt_ctf_notif_iter
{
111 /* Error stream (may be NULL) */
115 * Current dynamic scope field pointer.
117 * This is set when a dynamic scope field is first created by
118 * btr_compound_begin_cb(). It points to one of the fields in
121 struct bt_ctf_field
**cur_dscope_field
;
123 /* Trace and classes (owned by this) */
125 struct bt_ctf_trace
*trace
;
126 struct bt_ctf_stream_class
*stream_class
;
127 struct bt_ctf_event_class
*event_class
;
130 /* Current packet (NULL if not created yet) */
131 struct bt_ctf_packet
*packet
;
133 /* Database of current dynamic scopes (owned by this) */
135 struct bt_ctf_field
*trace_packet_header
;
136 struct bt_ctf_field
*stream_packet_context
;
137 struct bt_ctf_field
*stream_event_header
;
138 struct bt_ctf_field
*stream_event_context
;
139 struct bt_ctf_field
*event_context
;
140 struct bt_ctf_field
*event_payload
;
146 /* Current medium buffer data */
148 /* Last address provided by medium */
151 /* Buffer size provided by medium (bytes) */
154 /* Offset within whole packet of addr (bits) */
155 size_t packet_offset
;
157 /* Current position from addr (bits) */
161 /* Binary type reader */
162 struct bt_ctf_btr
*btr
;
164 /* Current medium data */
166 struct bt_ctf_notif_iter_medium_ops medops
;
167 size_t max_request_sz
;
171 /* Current packet size (bits) (-1 if unknown) */
172 int64_t cur_packet_size
;
174 /* Current content size (bits) (-1 if unknown) */
175 int64_t cur_content_size
;
179 int bt_ctf_notif_iter_switch_packet(struct bt_ctf_notif_iter
*notit
);
182 void stack_entry_free_func(gpointer data
)
184 struct stack_entry
*entry
= data
;
191 struct stack
*stack_new(struct bt_ctf_notif_iter
*notit
)
193 struct stack
*stack
= NULL
;
195 stack
= g_new0(struct stack
, 1);
200 stack
->entries
= g_ptr_array_new_with_free_func(stack_entry_free_func
);
201 if (!stack
->entries
) {
212 void stack_destroy(struct stack
*stack
)
215 g_ptr_array_free(stack
->entries
, TRUE
);
220 int stack_push(struct stack
*stack
, struct bt_ctf_field
*base
)
223 struct stack_entry
*entry
;
227 entry
= g_new0(struct stack_entry
, 1);
233 entry
->base
= bt_get(base
);
234 g_ptr_array_add(stack
->entries
, entry
);
241 unsigned int stack_size(struct stack
*stack
)
245 return stack
->entries
->len
;
249 void stack_pop(struct stack
*stack
)
252 assert(stack_size(stack
));
253 g_ptr_array_remove_index(stack
->entries
, stack
->entries
->len
- 1);
257 struct stack_entry
*stack_top(struct stack
*stack
)
260 assert(stack_size(stack
));
262 return g_ptr_array_index(stack
->entries
, stack
->entries
->len
- 1);
266 bool stack_empty(struct stack
*stack
)
268 return stack_size(stack
) == 0;
272 void stack_clear(struct stack
*stack
)
276 if (!stack_empty(stack
)) {
277 g_ptr_array_remove_range(stack
->entries
, 0, stack_size(stack
));
280 assert(stack_empty(stack
));
284 enum bt_ctf_notif_iter_status
notif_iter_status_from_m_status(
285 enum bt_ctf_notif_iter_medium_status m_status
)
291 size_t buf_size_bits(struct bt_ctf_notif_iter
*notit
)
293 return BYTES_TO_BITS(notit
->buf
.sz
);
297 size_t buf_available_bits(struct bt_ctf_notif_iter
*notit
)
299 return buf_size_bits(notit
) - notit
->buf
.at
;
303 size_t packet_at(struct bt_ctf_notif_iter
*notit
)
305 return notit
->buf
.packet_offset
+ notit
->buf
.at
;
309 size_t remaining_content_bits(struct bt_ctf_notif_iter
*notit
)
311 if (notit
->cur_content_size
== -1) {
315 return notit
->cur_content_size
- packet_at(notit
);
319 size_t remaining_packet_bits(struct bt_ctf_notif_iter
*notit
)
321 if (notit
->cur_packet_size
== -1) {
325 return notit
->cur_packet_size
- packet_at(notit
);
329 void buf_consume_bits(struct bt_ctf_notif_iter
*notit
, size_t incr
)
331 notit
->buf
.at
+= incr
;
335 bool buf_has_enough_bits(struct bt_ctf_notif_iter
*notit
, size_t sz
)
337 return buf_available_bits(notit
) >= sz
;
341 enum bt_ctf_notif_iter_status
request_medium_bytes(
342 struct bt_ctf_notif_iter
*notit
)
344 uint8_t *buffer_addr
;
346 enum bt_ctf_notif_iter_medium_status m_status
;
348 m_status
= notit
->medium
.medops
.request_bytes(
349 notit
->medium
.max_request_sz
, &buffer_addr
,
350 &buffer_sz
, notit
->medium
.data
);
351 if (m_status
== BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK
) {
352 assert(buffer_sz
!= 0);
354 /* New packet offset is old one + old size (in bits) */
355 notit
->buf
.packet_offset
+= buf_size_bits(notit
);
357 /* Restart at the beginning of the new medium buffer */
360 /* New medium buffer size */
361 notit
->buf
.sz
= buffer_sz
;
363 /* New medium buffer address */
364 notit
->buf
.addr
= buffer_addr
;
367 return notif_iter_status_from_m_status(m_status
);
371 enum bt_ctf_notif_iter_status
buf_ensure_available_bits(
372 struct bt_ctf_notif_iter
*notit
)
374 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
376 if (buf_available_bits(notit
) == 0) {
378 * This _cannot_ return BT_CTF_NOTIF_ITER_STATUS_OK
381 status
= request_medium_bytes(notit
);
388 enum bt_ctf_notif_iter_status
read_dscope_begin_state(
389 struct bt_ctf_notif_iter
*notit
,
390 struct bt_ctf_field_type
*dscope_field_type
,
391 enum state done_state
, enum state continue_state
,
392 struct bt_ctf_field
**dscope_field
)
394 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
395 enum bt_ctf_btr_status btr_status
;
396 size_t consumed_bits
;
398 status
= buf_ensure_available_bits(notit
);
399 if (status
!= BT_CTF_NOTIF_ITER_STATUS_OK
) {
403 bt_put(*dscope_field
);
404 notit
->cur_dscope_field
= dscope_field
;
405 consumed_bits
= bt_ctf_btr_start(notit
->btr
, dscope_field_type
,
406 notit
->buf
.addr
, notit
->buf
.at
, packet_at(notit
),
407 notit
->buf
.sz
, &btr_status
);
409 switch (btr_status
) {
410 case BT_CTF_BTR_STATUS_OK
:
411 /* type was read completely */
412 notit
->state
= done_state
;
414 case BT_CTF_BTR_STATUS_EOF
:
415 notit
->state
= continue_state
;
418 PERR("Binary type reader failed to start\n");
419 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
423 /* Consume bits now since we know we're not in an error state */
424 buf_consume_bits(notit
, consumed_bits
);
431 enum bt_ctf_notif_iter_status
read_dscope_continue_state(
432 struct bt_ctf_notif_iter
*notit
, enum state done_state
)
434 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
435 enum bt_ctf_btr_status btr_status
;
436 size_t consumed_bits
;
438 status
= buf_ensure_available_bits(notit
);
439 if (status
!= BT_CTF_NOTIF_ITER_STATUS_OK
) {
443 consumed_bits
= bt_ctf_btr_continue(notit
->btr
, notit
->buf
.addr
,
444 notit
->buf
.sz
, &btr_status
);
446 switch (btr_status
) {
447 case BT_CTF_BTR_STATUS_OK
:
448 /* Type was read completely. */
449 notit
->state
= done_state
;
451 case BT_CTF_BTR_STATUS_EOF
:
452 /* Stay in this continue state. */
455 PERR("Binary type reader failed to continue\n");
456 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
460 /* Consume bits now since we know we're not in an error state. */
461 buf_consume_bits(notit
, consumed_bits
);
467 void put_event_dscopes(struct bt_ctf_notif_iter
*notit
)
469 BT_PUT(notit
->dscopes
.stream_event_header
);
470 BT_PUT(notit
->dscopes
.stream_event_context
);
471 BT_PUT(notit
->dscopes
.event_context
);
472 BT_PUT(notit
->dscopes
.event_payload
);
476 void put_all_dscopes(struct bt_ctf_notif_iter
*notit
)
478 BT_PUT(notit
->dscopes
.trace_packet_header
);
479 BT_PUT(notit
->dscopes
.stream_packet_context
);
480 put_event_dscopes(notit
);
484 enum bt_ctf_notif_iter_status
read_packet_header_begin_state(
485 struct bt_ctf_notif_iter
*notit
)
487 struct bt_ctf_field_type
*packet_header_type
= NULL
;
488 enum bt_ctf_notif_iter_status ret
= BT_CTF_NOTIF_ITER_STATUS_OK
;
490 if (bt_ctf_notif_iter_switch_packet(notit
)) {
491 ret
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
495 /* Packet header type is common to the whole trace. */
496 packet_header_type
= bt_ctf_trace_get_packet_header_type(
498 if (!packet_header_type
) {
499 PERR("Failed to retrieve trace's packet header type\n");
500 ret
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
504 ret
= read_dscope_begin_state(notit
, packet_header_type
,
505 STATE_AFTER_TRACE_PACKET_HEADER
,
506 STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE
,
507 ¬it
->dscopes
.trace_packet_header
);
509 BT_PUT(packet_header_type
);
514 enum bt_ctf_notif_iter_status
read_packet_header_continue_state(
515 struct bt_ctf_notif_iter
*notit
)
517 return read_dscope_continue_state(notit
,
518 STATE_AFTER_TRACE_PACKET_HEADER
);
522 bool is_struct_type(struct bt_ctf_field_type
*field_type
)
524 return bt_ctf_field_type_get_type_id(field_type
) ==
525 BT_CTF_TYPE_ID_STRUCT
;
529 bool is_variant_type(struct bt_ctf_field_type
*field_type
)
531 return bt_ctf_field_type_get_type_id(field_type
) ==
532 BT_CTF_TYPE_ID_VARIANT
;
536 enum bt_ctf_notif_iter_status
set_current_stream_class(struct bt_ctf_notif_iter
*notit
)
538 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
539 struct bt_ctf_field_type
*packet_header_type
;
540 struct bt_ctf_field_type
*stream_id_field_type
= NULL
;
543 /* Is there any "stream_id" field in the packet header? */
544 packet_header_type
= bt_ctf_trace_get_packet_header_type(
546 if (!packet_header_type
) {
547 PERR("Failed to retrieve trace's packet header type\n");
548 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
552 assert(is_struct_type(packet_header_type
));
555 stream_id_field_type
=
556 bt_ctf_field_type_structure_get_field_type_by_name(
557 packet_header_type
, "stream_id");
558 if (stream_id_field_type
) {
559 /* Find appropriate stream class using current stream ID */
560 struct bt_ctf_field
*stream_id_field
= NULL
;
563 assert(notit
->dscopes
.trace_packet_header
);
566 stream_id_field
= bt_ctf_field_structure_get_field(
567 notit
->dscopes
.trace_packet_header
, "stream_id");
568 assert(stream_id_field
);
569 ret
= bt_ctf_field_unsigned_integer_get_value(
570 stream_id_field
, &stream_id
);
572 BT_PUT(stream_id_field
);
574 /* Only one stream: pick the first stream class */
575 assert(bt_ctf_trace_get_stream_class_count(
576 notit
->meta
.trace
) == 1);
580 BT_PUT(notit
->meta
.stream_class
);
581 notit
->meta
.stream_class
= bt_ctf_trace_get_stream_class_by_id(
582 notit
->meta
.trace
, stream_id
);
583 if (!notit
->meta
.stream_class
) {
584 PERR("Cannot find stream class with ID %" PRIu64
"\n",
586 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
591 BT_PUT(packet_header_type
);
592 BT_PUT(stream_id_field_type
);
598 enum bt_ctf_notif_iter_status
after_packet_header_state(
599 struct bt_ctf_notif_iter
*notit
)
601 enum bt_ctf_notif_iter_status status
;
603 status
= set_current_stream_class(notit
);
604 if (status
== BT_CTF_NOTIF_ITER_STATUS_OK
) {
605 notit
->state
= STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN
;
612 enum bt_ctf_notif_iter_status
read_packet_context_begin_state(
613 struct bt_ctf_notif_iter
*notit
)
615 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
616 struct bt_ctf_field_type
*packet_context_type
;
618 assert(notit
->meta
.stream_class
);
619 packet_context_type
= bt_ctf_stream_class_get_packet_context_type(
620 notit
->meta
.stream_class
);
621 if (!packet_context_type
) {
622 PERR("Failed to retrieve stream class's packet context\n");
623 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
627 status
= read_dscope_begin_state(notit
, packet_context_type
,
628 STATE_AFTER_STREAM_PACKET_CONTEXT
,
629 STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE
,
630 ¬it
->dscopes
.stream_packet_context
);
633 BT_PUT(packet_context_type
);
638 enum bt_ctf_notif_iter_status
read_packet_context_continue_state(
639 struct bt_ctf_notif_iter
*notit
)
641 return read_dscope_continue_state(notit
,
642 STATE_AFTER_STREAM_PACKET_CONTEXT
);
646 enum bt_ctf_notif_iter_status
set_current_packet_content_sizes(
647 struct bt_ctf_notif_iter
*notit
)
649 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
650 struct bt_ctf_field
*packet_size_field
= NULL
;
651 struct bt_ctf_field
*content_size_field
= NULL
;
652 uint64_t content_size
= -1, packet_size
= -1;
654 assert(notit
->dscopes
.stream_packet_context
);
656 packet_size_field
= bt_ctf_field_structure_get_field(
657 notit
->dscopes
.stream_packet_context
, "packet_size");
658 content_size_field
= bt_ctf_field_structure_get_field(
659 notit
->dscopes
.stream_packet_context
, "content_size");
660 if (packet_size_field
) {
661 int ret
= bt_ctf_field_unsigned_integer_get_value(
662 packet_size_field
, &packet_size
);
665 if (packet_size
== 0) {
666 PERR("Decoded packet size is 0\n");
667 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
669 } else if ((packet_size
% 8) != 0) {
670 PERR("Decoded packet size is not a multiple of 8\n");
671 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
676 if (content_size_field
) {
677 int ret
= bt_ctf_field_unsigned_integer_get_value(
678 content_size_field
, &content_size
);
682 content_size
= packet_size
;
685 notit
->cur_packet_size
= packet_size
;
686 notit
->cur_content_size
= content_size
;
688 BT_PUT(packet_size_field
);
689 BT_PUT(content_size_field
);
694 enum bt_ctf_notif_iter_status
after_packet_context_state(
695 struct bt_ctf_notif_iter
*notit
)
697 enum bt_ctf_notif_iter_status status
;
699 status
= set_current_packet_content_sizes(notit
);
700 if (status
== BT_CTF_NOTIF_ITER_STATUS_OK
) {
701 notit
->state
= STATE_EMIT_NOTIF_NEW_PACKET
;
708 enum bt_ctf_notif_iter_status
read_event_header_begin_state(
709 struct bt_ctf_notif_iter
*notit
)
711 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
712 struct bt_ctf_field_type
*event_header_type
= NULL
;
714 /* Check if we have some content left */
715 if (notit
->cur_content_size
>= 0) {
716 if (packet_at(notit
) == notit
->cur_content_size
) {
717 /* No more events! */
718 notit
->state
= STATE_EMIT_NOTIF_END_OF_PACKET
;
720 } else if (packet_at(notit
) > notit
->cur_content_size
) {
721 /* That's not supposed to happen */
722 PERR("Cursor passed packet's content size:\n");
723 PERR("\tDecoded content size: %zu\n",
724 notit
->cur_content_size
);
725 PERR("\tCursor position: %zu\n", packet_at(notit
));
726 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
731 event_header_type
= bt_ctf_stream_class_get_event_header_type(
732 notit
->meta
.stream_class
);
733 if (!event_header_type
) {
734 PERR("Failed to retrieve stream class's event header type\n");
735 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
739 put_event_dscopes(notit
);
740 status
= read_dscope_begin_state(notit
, event_header_type
,
741 STATE_AFTER_STREAM_EVENT_HEADER
,
742 STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE
,
743 ¬it
->dscopes
.stream_event_header
);
745 BT_PUT(event_header_type
);
751 enum bt_ctf_notif_iter_status
read_event_header_continue_state(
752 struct bt_ctf_notif_iter
*notit
)
754 return read_dscope_continue_state(notit
,
755 STATE_AFTER_STREAM_EVENT_HEADER
);
759 enum bt_ctf_notif_iter_status
set_current_event_class(struct bt_ctf_notif_iter
*notit
)
762 * The assert() calls in this function are okay because it is
763 * assumed here that all the metadata objects have been
764 * validated for CTF correctness before decoding actual streams.
767 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
768 struct bt_ctf_field_type
*event_header_type
;
769 struct bt_ctf_field_type
*id_field_type
= NULL
;
770 struct bt_ctf_field_type
*v_field_type
= NULL
;
771 uint64_t event_id
= -1ULL;
774 event_header_type
= bt_ctf_stream_class_get_event_header_type(
775 notit
->meta
.stream_class
);
776 if (!event_header_type
) {
777 PERR("Failed to retrieve stream class's event header type\n");
778 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
782 /* Is there any "id"/"v" field in the event header? */
783 assert(is_struct_type(event_header_type
));
784 id_field_type
= bt_ctf_field_type_structure_get_field_type_by_name(
785 event_header_type
, "id");
786 v_field_type
= bt_ctf_field_type_structure_get_field_type_by_name(
787 event_header_type
, "v");
788 assert(notit
->dscopes
.stream_event_header
);
792 * | | |_ _|_ _| __ __ _
793 * | | | | | || '_ \ / _` |
794 * | |___| | | || | | | (_| | S P E C I A L
795 * |_____|_| |_||_| |_|\__, | C A S E â„¢
798 struct bt_ctf_field
*v_field
= NULL
;
799 struct bt_ctf_field
*v_struct_field
= NULL
;
800 struct bt_ctf_field
*v_struct_id_field
= NULL
;
803 v_field
= bt_ctf_field_structure_get_field(
804 notit
->dscopes
.stream_event_header
, "v");
808 bt_ctf_field_variant_get_current_field(v_field
);
809 if (!v_struct_field
) {
810 goto end_v_field_type
;
815 bt_ctf_field_structure_get_field(v_struct_field
, "id");
816 if (!v_struct_id_field
) {
817 goto end_v_field_type
;
820 ret
= bt_ctf_field_unsigned_integer_get_value(
821 v_struct_id_field
, &event_id
);
828 BT_PUT(v_struct_field
);
829 BT_PUT(v_struct_id_field
);
832 if (id_field_type
&& event_id
== -1ULL) {
833 /* Check "id" field */
834 struct bt_ctf_field
*id_field
= NULL
;
838 id_field
= bt_ctf_field_structure_get_field(
839 notit
->dscopes
.stream_event_header
, "id");
841 assert(bt_ctf_field_is_integer(id_field
) ||
842 bt_ctf_field_is_enumeration(id_field
));
844 if (bt_ctf_field_is_integer(id_field
)) {
845 ret
= bt_ctf_field_unsigned_integer_get_value(
846 id_field
, &event_id
);
848 struct bt_ctf_field
*container
;
850 container
= bt_ctf_field_enumeration_get_container(
853 ret
= bt_ctf_field_unsigned_integer_get_value(
854 container
, &event_id
);
861 if (event_id
== -1ULL) {
862 /* Event ID not found: single event? */
863 assert(bt_ctf_stream_class_get_event_class_count(
864 notit
->meta
.stream_class
) == 1);
868 BT_PUT(notit
->meta
.event_class
);
869 notit
->meta
.event_class
= bt_ctf_stream_class_get_event_class_by_id(
870 notit
->meta
.stream_class
, event_id
);
871 if (!notit
->meta
.event_class
) {
872 PERR("Cannot find event class with ID %" PRIu64
"\n", event_id
);
873 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
878 BT_PUT(event_header_type
);
879 BT_PUT(id_field_type
);
880 BT_PUT(v_field_type
);
886 enum bt_ctf_notif_iter_status
after_event_header_state(
887 struct bt_ctf_notif_iter
*notit
)
889 enum bt_ctf_notif_iter_status status
;
891 status
= set_current_event_class(notit
);
892 if (status
!= BT_CTF_NOTIF_ITER_STATUS_OK
) {
893 PERR("Failed to set current event class\n");
897 notit
->state
= STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN
;
904 enum bt_ctf_notif_iter_status
read_stream_event_context_begin_state(
905 struct bt_ctf_notif_iter
*notit
)
907 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
908 struct bt_ctf_field_type
*stream_event_context_type
;
910 stream_event_context_type
= bt_ctf_stream_class_get_event_context_type(
911 notit
->meta
.stream_class
);
912 if (!stream_event_context_type
) {
913 PERR("Failed to retrieve stream class's event context type\n");
914 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
918 status
= read_dscope_begin_state(notit
, stream_event_context_type
,
919 STATE_DSCOPE_EVENT_CONTEXT_BEGIN
,
920 STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE
,
921 ¬it
->dscopes
.stream_event_context
);
924 BT_PUT(stream_event_context_type
);
930 enum bt_ctf_notif_iter_status
read_stream_event_context_continue_state(
931 struct bt_ctf_notif_iter
*notit
)
933 return read_dscope_continue_state(notit
,
934 STATE_DSCOPE_EVENT_CONTEXT_BEGIN
);
938 enum bt_ctf_notif_iter_status
read_event_context_begin_state(
939 struct bt_ctf_notif_iter
*notit
)
941 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
942 struct bt_ctf_field_type
*event_context_type
;
944 event_context_type
= bt_ctf_event_class_get_context_type(
945 notit
->meta
.event_class
);
946 if (!event_context_type
) {
947 PERR("Failed to retrieve event class's context type\n");
948 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
952 status
= read_dscope_begin_state(notit
, event_context_type
,
953 STATE_DSCOPE_EVENT_PAYLOAD_BEGIN
,
954 STATE_DSCOPE_EVENT_CONTEXT_CONTINUE
,
955 ¬it
->dscopes
.event_context
);
958 BT_PUT(event_context_type
);
964 enum bt_ctf_notif_iter_status
read_event_context_continue_state(
965 struct bt_ctf_notif_iter
*notit
)
967 return read_dscope_continue_state(notit
,
968 STATE_DSCOPE_EVENT_PAYLOAD_BEGIN
);
972 enum bt_ctf_notif_iter_status
read_event_payload_begin_state(
973 struct bt_ctf_notif_iter
*notit
)
975 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
976 struct bt_ctf_field_type
*event_payload_type
;
978 event_payload_type
= bt_ctf_event_class_get_payload_type(
979 notit
->meta
.event_class
);
980 if (!event_payload_type
) {
981 PERR("Failed to retrieve event class's payload type\n");
982 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
986 status
= read_dscope_begin_state(notit
, event_payload_type
,
987 STATE_EMIT_NOTIF_EVENT
,
988 STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE
,
989 ¬it
->dscopes
.event_payload
);
992 BT_PUT(event_payload_type
);
998 enum bt_ctf_notif_iter_status
read_event_payload_continue_state(
999 struct bt_ctf_notif_iter
*notit
)
1001 return read_dscope_continue_state(notit
, STATE_EMIT_NOTIF_EVENT
);
1005 enum bt_ctf_notif_iter_status
skip_packet_padding_state(
1006 struct bt_ctf_notif_iter
*notit
)
1008 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
1009 size_t bits_to_skip
;
1011 assert(notit
->cur_packet_size
> 0);
1012 bits_to_skip
= notit
->cur_packet_size
- packet_at(notit
);
1013 if (bits_to_skip
== 0) {
1014 notit
->state
= STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN
;
1017 size_t bits_to_consume
;
1018 status
= buf_ensure_available_bits(notit
);
1019 if (status
!= BT_CTF_NOTIF_ITER_STATUS_OK
) {
1023 bits_to_consume
= MIN(buf_available_bits(notit
), bits_to_skip
);
1024 buf_consume_bits(notit
, bits_to_consume
);
1025 bits_to_skip
= notit
->cur_packet_size
- packet_at(notit
);
1026 if (bits_to_skip
== 0) {
1027 notit
->state
= STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN
;
1037 enum bt_ctf_notif_iter_status
handle_state(struct bt_ctf_notif_iter
*notit
)
1039 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
1041 PDBG("Handling state %d\n", notit
->state
);
1043 // TODO: optimalize!
1044 switch (notit
->state
) {
1046 notit
->state
= STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN
;
1048 case STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN
:
1049 status
= read_packet_header_begin_state(notit
);
1051 case STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE
:
1052 status
= read_packet_header_continue_state(notit
);
1054 case STATE_AFTER_TRACE_PACKET_HEADER
:
1055 status
= after_packet_header_state(notit
);
1057 case STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN
:
1058 status
= read_packet_context_begin_state(notit
);
1060 case STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE
:
1061 status
= read_packet_context_continue_state(notit
);
1063 case STATE_AFTER_STREAM_PACKET_CONTEXT
:
1064 status
= after_packet_context_state(notit
);
1066 case STATE_EMIT_NOTIF_NEW_PACKET
:
1067 notit
->state
= STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN
;
1069 case STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN
:
1070 status
= read_event_header_begin_state(notit
);
1072 case STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE
:
1073 status
= read_event_header_continue_state(notit
);
1075 case STATE_AFTER_STREAM_EVENT_HEADER
:
1076 status
= after_event_header_state(notit
);
1078 case STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN
:
1079 status
= read_stream_event_context_begin_state(notit
);
1081 case STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE
:
1082 status
= read_stream_event_context_continue_state(notit
);
1084 case STATE_DSCOPE_EVENT_CONTEXT_BEGIN
:
1085 status
= read_event_context_begin_state(notit
);
1087 case STATE_DSCOPE_EVENT_CONTEXT_CONTINUE
:
1088 status
= read_event_context_continue_state(notit
);
1090 case STATE_DSCOPE_EVENT_PAYLOAD_BEGIN
:
1091 status
= read_event_payload_begin_state(notit
);
1093 case STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE
:
1094 status
= read_event_payload_continue_state(notit
);
1096 case STATE_EMIT_NOTIF_EVENT
:
1097 notit
->state
= STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN
;
1099 case STATE_SKIP_PACKET_PADDING
:
1100 status
= skip_packet_padding_state(notit
);
1102 case STATE_EMIT_NOTIF_END_OF_PACKET
:
1103 notit
->state
= STATE_SKIP_PACKET_PADDING
;
1112 * Resets the internal state of a CTF notification iterator.
1114 * This function can be used when it is desired to seek to the beginning
1115 * of another packet. It is expected that the next call to
1116 * bt_ctf_notif_iter_medium_ops::request_bytes() made by this
1117 * notification iterator will return the \em first bytes of a \em
1120 * @param notif_iter CTF notification iterator
1123 void bt_ctf_notif_iter_reset(struct bt_ctf_notif_iter
*notit
)
1126 stack_clear(notit
->stack
);
1127 BT_PUT(notit
->meta
.stream_class
);
1128 BT_PUT(notit
->meta
.event_class
);
1129 BT_PUT(notit
->packet
);
1130 put_all_dscopes(notit
);
1131 notit
->buf
.addr
= NULL
;
1134 notit
->buf
.packet_offset
= 0;
1135 notit
->state
= STATE_INIT
;
1136 notit
->cur_content_size
= -1;
1137 notit
->cur_packet_size
= -1;
1141 int bt_ctf_notif_iter_switch_packet(struct bt_ctf_notif_iter
*notit
)
1146 stack_clear(notit
->stack
);
1147 BT_PUT(notit
->meta
.stream_class
);
1148 BT_PUT(notit
->meta
.event_class
);
1149 BT_PUT(notit
->packet
);
1150 put_all_dscopes(notit
);
1153 * Adjust current buffer so that addr points to the beginning of the new
1156 if (notit
->buf
.addr
) {
1157 size_t consumed_bytes
= (size_t) (notit
->buf
.at
/ CHAR_BIT
);
1159 /* Packets are assumed to start on a byte frontier. */
1160 if (notit
->buf
.at
% CHAR_BIT
) {
1165 notit
->buf
.addr
+= consumed_bytes
;
1166 notit
->buf
.sz
-= consumed_bytes
;
1168 notit
->buf
.packet_offset
= 0;
1171 notit
->cur_content_size
= -1;
1172 notit
->cur_packet_size
= -1;
1178 struct bt_ctf_field
*get_next_field(struct bt_ctf_notif_iter
*notit
)
1180 struct bt_ctf_field
*next_field
= NULL
;
1181 struct bt_ctf_field
*base_field
;
1182 struct bt_ctf_field_type
*base_type
;
1185 assert(!stack_empty(notit
->stack
));
1186 index
= stack_top(notit
->stack
)->index
;
1187 base_field
= stack_top(notit
->stack
)->base
;
1188 base_type
= bt_ctf_field_get_type(base_field
);
1190 PERR("Failed to get base field's type\n");
1194 switch (bt_ctf_field_type_get_type_id(base_type
)) {
1195 case BT_CTF_TYPE_ID_STRUCT
:
1196 next_field
= bt_ctf_field_structure_get_field_by_index(
1199 case BT_CTF_TYPE_ID_ARRAY
:
1200 next_field
= bt_ctf_field_array_get_field(base_field
, index
);
1202 case BT_CTF_TYPE_ID_SEQUENCE
:
1203 next_field
= bt_ctf_field_sequence_get_field(base_field
, index
);
1205 case BT_CTF_TYPE_ID_VARIANT
:
1206 next_field
= bt_ctf_field_variant_get_current_field(base_field
);
1224 enum bt_ctf_btr_status
btr_signed_int_cb(int64_t value
,
1225 struct bt_ctf_field_type
*type
, void *data
)
1227 enum bt_ctf_btr_status status
= BT_CTF_BTR_STATUS_OK
;
1228 struct bt_ctf_field
*field
= NULL
;
1229 struct bt_ctf_field
*int_field
= NULL
;
1230 struct bt_ctf_notif_iter
*notit
= data
;
1233 /* create next field */
1234 field
= get_next_field(notit
);
1236 PERR("Failed to get next field (signed int)\n");
1237 status
= BT_CTF_BTR_STATUS_ERROR
;
1241 switch(bt_ctf_field_type_get_type_id(type
)) {
1242 case BT_CTF_TYPE_ID_INTEGER
:
1243 /* Integer field is created field */
1244 BT_MOVE(int_field
, field
);
1246 case BT_CTF_TYPE_ID_ENUM
:
1247 int_field
= bt_ctf_field_enumeration_get_container(field
);
1254 PERR("Failed to get integer field\n");
1255 status
= BT_CTF_BTR_STATUS_ERROR
;
1259 ret
= bt_ctf_field_signed_integer_set_value(int_field
, value
);
1261 stack_top(notit
->stack
)->index
++;
1271 enum bt_ctf_btr_status
btr_unsigned_int_cb(uint64_t value
,
1272 struct bt_ctf_field_type
*type
, void *data
)
1274 enum bt_ctf_btr_status status
= BT_CTF_BTR_STATUS_OK
;
1275 struct bt_ctf_field
*field
= NULL
;
1276 struct bt_ctf_field
*int_field
= NULL
;
1277 struct bt_ctf_notif_iter
*notit
= data
;
1280 /* Create next field */
1281 field
= get_next_field(notit
);
1283 PERR("Failed to get next field (unsigned int)\n");
1284 status
= BT_CTF_BTR_STATUS_ERROR
;
1288 switch(bt_ctf_field_type_get_type_id(type
)) {
1289 case BT_CTF_TYPE_ID_INTEGER
:
1290 /* Integer field is created field */
1291 BT_MOVE(int_field
, field
);
1293 case BT_CTF_TYPE_ID_ENUM
:
1294 int_field
= bt_ctf_field_enumeration_get_container(field
);
1301 PERR("Failed to get integer field\n");
1302 status
= BT_CTF_BTR_STATUS_ERROR
;
1306 ret
= bt_ctf_field_unsigned_integer_set_value(int_field
, value
);
1308 stack_top(notit
->stack
)->index
++;
1318 enum bt_ctf_btr_status
btr_floating_point_cb(double value
,
1319 struct bt_ctf_field_type
*type
, void *data
)
1321 enum bt_ctf_btr_status status
= BT_CTF_BTR_STATUS_OK
;
1322 struct bt_ctf_field
*field
= NULL
;
1323 struct bt_ctf_notif_iter
*notit
= data
;
1326 /* Create next field */
1327 field
= get_next_field(notit
);
1329 PERR("Failed to get next field (floating point number)\n");
1330 status
= BT_CTF_BTR_STATUS_ERROR
;
1334 ret
= bt_ctf_field_floating_point_set_value(field
, value
);
1336 stack_top(notit
->stack
)->index
++;
1345 enum bt_ctf_btr_status
btr_string_begin_cb(
1346 struct bt_ctf_field_type
*type
, void *data
)
1348 enum bt_ctf_btr_status status
= BT_CTF_BTR_STATUS_OK
;
1349 struct bt_ctf_field
*field
= NULL
;
1350 struct bt_ctf_notif_iter
*notit
= data
;
1353 /* Create next field */
1354 field
= get_next_field(notit
);
1356 PERR("Failed to get next field (string)\n");
1357 status
= BT_CTF_BTR_STATUS_ERROR
;
1362 * Push on stack. Not a compound type per se, but we know that only
1363 * btr_string_cb() may be called between this call and a subsequent
1364 * call to btr_string_end_cb().
1366 ret
= stack_push(notit
->stack
, field
);
1368 PERR("Failed to push string field onto the stack\n");
1369 status
= BT_CTF_BTR_STATUS_ERROR
;
1380 enum bt_ctf_btr_status
btr_string_cb(const char *value
,
1381 size_t len
, struct bt_ctf_field_type
*type
, void *data
)
1383 enum bt_ctf_btr_status status
= BT_CTF_BTR_STATUS_OK
;
1384 struct bt_ctf_field
*field
= NULL
;
1385 struct bt_ctf_notif_iter
*notit
= data
;
1388 /* Get string field */
1389 field
= stack_top(notit
->stack
)->base
;
1392 /* Append current string */
1393 ret
= bt_ctf_field_string_append_len(field
, value
, len
);
1395 PERR("Failed to append a string to a string field\n");
1396 status
= BT_CTF_BTR_STATUS_ERROR
;
1405 enum bt_ctf_btr_status
btr_string_end_cb(
1406 struct bt_ctf_field_type
*type
, void *data
)
1408 struct bt_ctf_notif_iter
*notit
= data
;
1410 /* Pop string field */
1411 stack_pop(notit
->stack
);
1413 /* Go to next field */
1414 stack_top(notit
->stack
)->index
++;
1416 return BT_CTF_BTR_STATUS_OK
;
1419 enum bt_ctf_btr_status
btr_compound_begin_cb(
1420 struct bt_ctf_field_type
*type
, void *data
)
1422 enum bt_ctf_btr_status status
= BT_CTF_BTR_STATUS_OK
;
1423 struct bt_ctf_notif_iter
*notit
= data
;
1424 struct bt_ctf_field
*field
;
1428 if (stack_empty(notit
->stack
)) {
1429 /* Root: create dynamic scope field */
1430 *notit
->cur_dscope_field
= bt_ctf_field_create(type
);
1431 field
= *notit
->cur_dscope_field
;
1434 * Field will be put at the end of this function
1435 * (stack_push() will take one reference, but this
1436 * reference is lost upon the equivalent stack_pop()
1437 * later), so also get it for our context to own it.
1439 bt_get(*notit
->cur_dscope_field
);
1441 field
= get_next_field(notit
);
1445 PERR("Failed to get next field or create dynamic scope field\n");
1446 status
= BT_CTF_BTR_STATUS_ERROR
;
1451 ret
= stack_push(notit
->stack
, field
);
1453 PERR("Failed to push compound field onto the stack\n");
1454 status
= BT_CTF_BTR_STATUS_ERROR
;
1464 enum bt_ctf_btr_status
btr_compound_end_cb(
1465 struct bt_ctf_field_type
*type
, void *data
)
1467 struct bt_ctf_notif_iter
*notit
= data
;
1469 assert(!stack_empty(notit
->stack
));
1472 stack_pop(notit
->stack
);
1474 /* If the stack is not empty, increment the base's index */
1475 if (!stack_empty(notit
->stack
)) {
1476 stack_top(notit
->stack
)->index
++;
1479 return BT_CTF_BTR_STATUS_OK
;
1483 struct bt_ctf_field
*resolve_field(struct bt_ctf_notif_iter
*notit
,
1484 struct bt_ctf_field_path
*path
)
1486 struct bt_ctf_field
*field
= NULL
;
1489 switch (bt_ctf_field_path_get_root_scope(path
)) {
1490 case BT_CTF_SCOPE_TRACE_PACKET_HEADER
:
1491 field
= notit
->dscopes
.trace_packet_header
;
1493 case BT_CTF_SCOPE_STREAM_PACKET_CONTEXT
:
1494 field
= notit
->dscopes
.stream_packet_context
;
1496 case BT_CTF_SCOPE_STREAM_EVENT_HEADER
:
1497 field
= notit
->dscopes
.stream_event_header
;
1499 case BT_CTF_SCOPE_STREAM_EVENT_CONTEXT
:
1500 field
= notit
->dscopes
.stream_event_context
;
1502 case BT_CTF_SCOPE_EVENT_CONTEXT
:
1503 field
= notit
->dscopes
.event_context
;
1505 case BT_CTF_SCOPE_EVENT_FIELDS
:
1506 field
= notit
->dscopes
.event_payload
;
1518 for (i
= 0; i
< bt_ctf_field_path_get_index_count(path
); ++i
) {
1519 struct bt_ctf_field
*next_field
= NULL
;
1520 struct bt_ctf_field_type
*field_type
;
1521 int index
= bt_ctf_field_path_get_index(path
, i
);
1523 field_type
= bt_ctf_field_get_type(field
);
1529 if (is_struct_type(field_type
)) {
1530 next_field
= bt_ctf_field_structure_get_field_by_index(
1532 } else if (is_variant_type(field_type
)) {
1534 bt_ctf_field_variant_get_current_field(field
);
1544 /* Move next field -> field */
1545 BT_MOVE(field
, next_field
);
1553 int64_t btr_get_sequence_length_cb(struct bt_ctf_field_type
*type
, void *data
)
1557 struct bt_ctf_field_path
*field_path
;
1558 struct bt_ctf_notif_iter
*notit
= data
;
1559 struct bt_ctf_field
*length_field
= NULL
;
1562 field_path
= bt_ctf_field_type_sequence_get_length_field_path(type
);
1567 length_field
= resolve_field(notit
, field_path
);
1568 if (!length_field
) {
1572 iret
= bt_ctf_field_unsigned_integer_get_value(length_field
, &length
);
1577 iret
= bt_ctf_field_sequence_set_length(stack_top(notit
->stack
)->base
,
1582 ret
= (int64_t) length
;
1585 BT_PUT(length_field
);
1592 struct bt_ctf_field_type
*btr_get_variant_type_cb(
1593 struct bt_ctf_field_type
*type
, void *data
)
1595 struct bt_ctf_field_path
*path
;
1596 struct bt_ctf_notif_iter
*notit
= data
;
1597 struct bt_ctf_field
*tag_field
= NULL
;
1598 struct bt_ctf_field
*selected_field
= NULL
;
1599 struct bt_ctf_field_type
*selected_field_type
= NULL
;
1601 path
= bt_ctf_field_type_variant_get_tag_field_path(type
);
1606 tag_field
= resolve_field(notit
, path
);
1612 * We found the enumeration tag field instance which should be
1613 * able to select a current field for this variant. This
1614 * callback function we're in is called _after_
1615 * compound_begin(), so the current stack top's base field is
1616 * the variant field in question. We get the selected field here
1617 * thanks to this tag field (thus creating the selected field),
1618 * which will also provide us with its type. Then, this field
1619 * will remain the current selected one until the next callback
1620 * function call which is used to fill the current selected
1623 selected_field
= bt_ctf_field_variant_get_field(
1624 stack_top(notit
->stack
)->base
, tag_field
);
1625 if (!selected_field
) {
1629 selected_field_type
= bt_ctf_field_get_type(selected_field
);
1633 BT_PUT(selected_field
);
1636 return selected_field_type
;
1640 struct bt_ctf_event
*create_event(struct bt_ctf_notif_iter
*notit
)
1643 struct bt_ctf_event
*event
;
1645 /* Create event object. */
1646 event
= bt_ctf_event_create(notit
->meta
.event_class
);
1651 /* Set header, stream event context, context, and payload fields. */
1652 ret
= bt_ctf_event_set_header(event
,
1653 notit
->dscopes
.stream_event_header
);
1658 ret
= bt_ctf_event_set_stream_event_context(event
,
1659 notit
->dscopes
.stream_event_context
);
1664 ret
= bt_ctf_event_set_event_context(event
,
1665 notit
->dscopes
.event_context
);
1670 ret
= bt_ctf_event_set_payload_field(event
,
1671 notit
->dscopes
.event_payload
);
1676 /* Associate with current packet. */
1677 assert(notit
->packet
);
1678 ret
= bt_ctf_event_set_packet(event
, notit
->packet
);
1691 void create_packet(struct bt_ctf_notif_iter
*notit
)
1694 struct bt_ctf_stream
*stream
= NULL
;
1695 struct bt_ctf_packet
*packet
= NULL
;
1697 /* Ask the user for the stream */
1698 stream
= notit
->medium
.medops
.get_stream(notit
->meta
.stream_class
,
1699 notit
->medium
.data
);
1705 packet
= bt_ctf_packet_create(stream
);
1710 /* Set packet's context and header fields */
1711 if (notit
->dscopes
.trace_packet_header
) {
1712 ret
= bt_ctf_packet_set_header(packet
,
1713 notit
->dscopes
.trace_packet_header
);
1719 if (notit
->dscopes
.stream_packet_context
) {
1720 ret
= bt_ctf_packet_set_context(packet
,
1721 notit
->dscopes
.stream_packet_context
);
1731 BT_MOVE(notit
->packet
, packet
);
1735 void notify_new_packet(struct bt_ctf_notif_iter
*notit
,
1736 struct bt_notification
**notification
)
1738 struct bt_notification
*ret
;
1740 /* Initialize the iterator's current packet */
1741 create_packet(notit
);
1742 if (!notit
->packet
) {
1746 ret
= bt_notification_packet_start_create(notit
->packet
);
1750 *notification
= ret
;
1754 void notify_end_of_packet(struct bt_ctf_notif_iter
*notit
,
1755 struct bt_notification
**notification
)
1757 struct bt_notification
*ret
;
1759 if (!notit
->packet
) {
1763 ret
= bt_notification_packet_end_create(notit
->packet
);
1767 BT_PUT(notit
->packet
);
1768 *notification
= ret
;
1772 void notify_event(struct bt_ctf_notif_iter
*notit
,
1773 struct bt_notification
**notification
)
1775 struct bt_ctf_event
*event
;
1776 struct bt_notification
*ret
= NULL
;
1779 event
= create_event(notit
);
1784 ret
= bt_notification_event_create(event
);
1788 *notification
= ret
;
1794 void notify_eos(struct bt_ctf_notif_iter
*notit
,
1795 struct bt_notification
**notification
)
1797 struct bt_ctf_event
*event
;
1798 struct bt_notification
*ret
= NULL
;
1801 event
= create_event(notit
);
1806 ret
= bt_notification_stream_end_create(event
);
1810 *notification
= ret
;
1815 struct bt_ctf_notif_iter
*bt_ctf_notif_iter_create(struct bt_ctf_trace
*trace
,
1816 size_t max_request_sz
,
1817 struct bt_ctf_notif_iter_medium_ops medops
,
1818 void *data
, FILE *err_stream
)
1820 struct bt_ctf_notif_iter
*notit
= NULL
;
1821 struct bt_ctf_btr_cbs cbs
= {
1823 .signed_int
= btr_signed_int_cb
,
1824 .unsigned_int
= btr_unsigned_int_cb
,
1825 .floating_point
= btr_floating_point_cb
,
1826 .string_begin
= btr_string_begin_cb
,
1827 .string
= btr_string_cb
,
1828 .string_end
= btr_string_end_cb
,
1829 .compound_begin
= btr_compound_begin_cb
,
1830 .compound_end
= btr_compound_end_cb
,
1833 .get_sequence_length
= btr_get_sequence_length_cb
,
1834 .get_variant_type
= btr_get_variant_type_cb
,
1839 assert(medops
.request_bytes
);
1840 notit
= g_new0(struct bt_ctf_notif_iter
, 1);
1842 PERR("Failed to allocate memory for CTF notification iterator\n");
1846 notit
->meta
.trace
= bt_get(trace
);
1847 notit
->medium
.medops
= medops
;
1848 notit
->medium
.max_request_sz
= max_request_sz
;
1849 notit
->medium
.data
= data
;
1850 notit
->err_stream
= err_stream
;
1851 notit
->stack
= stack_new(notit
);
1852 if (!notit
->stack
) {
1853 PERR("Failed to create stack\n");
1854 bt_ctf_notif_iter_destroy(notit
);
1859 notit
->btr
= bt_ctf_btr_create(cbs
, notit
, err_stream
);
1861 PERR("Failed to create binary type reader\n");
1862 bt_ctf_notif_iter_destroy(notit
);
1867 bt_ctf_notif_iter_reset(notit
);
1873 void bt_ctf_notif_iter_destroy(struct bt_ctf_notif_iter
*notit
)
1875 BT_PUT(notit
->meta
.trace
);
1876 BT_PUT(notit
->meta
.stream_class
);
1877 BT_PUT(notit
->meta
.event_class
);
1878 BT_PUT(notit
->packet
);
1879 put_all_dscopes(notit
);
1882 stack_destroy(notit
->stack
);
1886 bt_ctf_btr_destroy(notit
->btr
);
1892 enum bt_ctf_notif_iter_status
bt_ctf_notif_iter_get_next_notification(
1893 struct bt_ctf_notif_iter
*notit
,
1894 struct bt_notification
**notification
)
1896 enum bt_ctf_notif_iter_status status
= BT_CTF_NOTIF_ITER_STATUS_OK
;
1899 assert(notification
);
1902 status
= handle_state(notit
);
1903 if (status
!= BT_CTF_NOTIF_ITER_STATUS_OK
) {
1904 if (status
== BT_CTF_NOTIF_ITER_STATUS_EOF
) {
1905 PDBG("Medium operation reported end of stream\n");
1907 PERR("Failed to handle state:\n");
1908 PERR("\tState: %d\n", notit
->state
);
1913 switch (notit
->state
) {
1914 case STATE_EMIT_NOTIF_NEW_PACKET
:
1915 PDBG("Emitting new packet notification\n");
1916 notify_new_packet(notit
, notification
);
1917 if (!*notification
) {
1918 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
1921 case STATE_EMIT_NOTIF_EVENT
:
1922 PDBG("Emitting event notification\n");
1923 notify_event(notit
, notification
);
1924 if (!*notification
) {
1925 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
1928 case STATE_EMIT_NOTIF_END_OF_PACKET
:
1929 PDBG("Emitting end of packet notification\n");
1930 notify_end_of_packet(notit
, notification
);
1931 if (!*notification
) {
1932 status
= BT_CTF_NOTIF_ITER_STATUS_ERROR
;
1936 /* Non-emitting state: continue */