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e98a2d6e PP |
1 | /* |
2 | * Babeltrace - CTF notification iterator | |
3 | * ¯¯¯¯¯ ¯¯¯¯ | |
4 | * Copyright (c) 2015-2016 EfficiOS Inc. and Linux Foundation | |
5 | * Copyright (c) 2015-2016 Philippe Proulx <pproulx@efficios.com> | |
6 | * | |
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: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
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 | |
23 | * SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include <stdint.h> | |
27 | #include <inttypes.h> | |
28 | #include <stdio.h> | |
29 | #include <stddef.h> | |
30 | #include <stdbool.h> | |
31 | #include <assert.h> | |
32 | #include <string.h> | |
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/ref.h> | |
42 | #include <glib.h> | |
43 | ||
44 | #define PRINT_ERR_STREAM notit->err_stream | |
45 | #define PRINT_PREFIX "ctf-notif-iter" | |
46 | #include "print.h" | |
47 | ||
48 | #include "ctf-notif-iter.h" | |
49 | #include "../ctf-btr/ctf-btr.h" | |
50 | ||
51 | #define BYTES_TO_BITS(x) ((x) * 8) | |
52 | ||
53 | struct bt_ctf_notif_iter; | |
54 | ||
55 | /* A visit stack entry */ | |
56 | struct stack_entry { | |
57 | /* | |
58 | * Current base field, one of: | |
59 | * | |
60 | * * string | |
61 | * * structure | |
62 | * * array | |
63 | * * sequence | |
64 | * * variant | |
65 | * | |
66 | * Field is owned by this. | |
67 | */ | |
68 | struct bt_ctf_field *base; | |
69 | ||
70 | /* index of next field to set */ | |
71 | size_t index; | |
72 | }; | |
73 | ||
74 | /* Visit stack */ | |
75 | struct stack { | |
76 | /* Entries (struct stack_entry *) (top is last element) */ | |
77 | GPtrArray *entries; | |
78 | ||
79 | /* Link to owner */ | |
80 | struct bt_ctf_notif_iter *notit; | |
81 | }; | |
82 | ||
83 | /* State */ | |
84 | enum state { | |
85 | STATE_INIT, | |
86 | STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN, | |
87 | STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE, | |
88 | STATE_AFTER_TRACE_PACKET_HEADER, | |
89 | STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN, | |
90 | STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE, | |
91 | STATE_AFTER_STREAM_PACKET_CONTEXT, | |
92 | STATE_EMIT_NOTIF_NEW_PACKET, | |
93 | STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN, | |
94 | STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE, | |
95 | STATE_AFTER_STREAM_EVENT_HEADER, | |
96 | STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN, | |
97 | STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE, | |
98 | STATE_DSCOPE_EVENT_CONTEXT_BEGIN, | |
99 | STATE_DSCOPE_EVENT_CONTEXT_CONTINUE, | |
100 | STATE_DSCOPE_EVENT_PAYLOAD_BEGIN, | |
101 | STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE, | |
102 | STATE_EMIT_NOTIF_EVENT, | |
103 | STATE_EMIT_NOTIF_END_OF_PACKET, | |
104 | STATE_SKIP_PACKET_PADDING, | |
105 | }; | |
106 | ||
107 | /* CTF notification iterator */ | |
108 | struct bt_ctf_notif_iter { | |
109 | /* Visit stack */ | |
110 | struct stack *stack; | |
111 | ||
112 | /* Error stream (may be NULL) */ | |
113 | FILE *err_stream; | |
114 | ||
115 | /* | |
116 | * Current dynamic scope field pointer. | |
117 | * | |
118 | * This is set when a dynamic scope field is first created by | |
119 | * btr_compound_begin_cb(). It points to one of the fields in | |
120 | * dscopes below. | |
121 | */ | |
122 | struct bt_ctf_field **cur_dscope_field; | |
123 | ||
124 | /* Trace and classes (owned by this) */ | |
125 | struct { | |
126 | struct bt_ctf_trace *trace; | |
127 | struct bt_ctf_stream_class *stream_class; | |
128 | struct bt_ctf_event_class *event_class; | |
129 | } meta; | |
130 | ||
131 | /* Current packet (NULL if not created yet) */ | |
132 | struct bt_ctf_packet *packet; | |
133 | ||
134 | /* Database of current dynamic scopes (owned by this) */ | |
135 | struct { | |
136 | struct bt_ctf_field *trace_packet_header; | |
137 | struct bt_ctf_field *stream_packet_context; | |
138 | struct bt_ctf_field *stream_event_header; | |
139 | struct bt_ctf_field *stream_event_context; | |
140 | struct bt_ctf_field *event_context; | |
141 | struct bt_ctf_field *event_payload; | |
142 | } dscopes; | |
143 | ||
144 | /* Current state */ | |
145 | enum state state; | |
146 | ||
147 | /* User buffer stuff */ | |
148 | struct { | |
149 | /* Last address provided by medium */ | |
150 | const uint8_t *addr; | |
151 | ||
152 | /* Buffer size provided by medium (bytes) */ | |
153 | size_t sz; | |
154 | ||
155 | /* Offset within whole packet of addr (bits) */ | |
156 | size_t packet_offset; | |
157 | ||
158 | /* Current position from addr (bits) */ | |
159 | size_t at; | |
160 | } buf; | |
161 | ||
162 | /* Binary type reader */ | |
163 | struct bt_ctf_btr *btr; | |
164 | ||
165 | /* Medium stuff */ | |
166 | struct { | |
167 | struct bt_ctf_notif_iter_medium_ops medops; | |
168 | size_t max_request_sz; | |
169 | void *data; | |
170 | } medium; | |
171 | ||
172 | /* Current packet size (bits) (-1 if unknown) */ | |
173 | size_t cur_packet_size; | |
174 | ||
175 | /* Current content size (bits) (-1 if unknown) */ | |
176 | size_t cur_content_size; | |
177 | }; | |
178 | ||
179 | static | |
180 | void stack_entry_free_func(gpointer data) | |
181 | { | |
182 | struct stack_entry *entry = data; | |
183 | ||
184 | bt_put(entry->base); | |
185 | g_free(entry); | |
186 | } | |
187 | ||
188 | static | |
189 | struct stack *stack_new(struct bt_ctf_notif_iter *notit) | |
190 | { | |
191 | struct stack *stack = NULL; | |
192 | ||
193 | stack = g_new0(struct stack, 1); | |
194 | if (!stack) { | |
195 | goto error; | |
196 | } | |
197 | ||
198 | stack->entries = g_ptr_array_new_with_free_func(stack_entry_free_func); | |
199 | if (!stack->entries) { | |
200 | goto error; | |
201 | } | |
202 | ||
203 | stack->notit = notit; | |
204 | ||
205 | return stack; | |
206 | ||
207 | error: | |
208 | g_free(stack); | |
209 | ||
210 | return NULL; | |
211 | } | |
212 | ||
213 | static | |
214 | void stack_destroy(struct stack *stack) | |
215 | { | |
216 | assert(stack); | |
217 | g_ptr_array_free(stack->entries, TRUE); | |
218 | g_free(stack); | |
219 | } | |
220 | ||
221 | static | |
222 | int stack_push(struct stack *stack, struct bt_ctf_field *base) | |
223 | { | |
224 | int ret = 0; | |
225 | struct stack_entry *entry; | |
226 | struct bt_ctf_notif_iter *notit; | |
227 | ||
228 | assert(stack); | |
229 | assert(base); | |
230 | notit = stack->notit; | |
231 | entry = g_new0(struct stack_entry, 1); | |
232 | if (!entry) { | |
233 | PERR("Cannot create new stack entry\n"); | |
234 | ret = -1; | |
235 | goto end; | |
236 | } | |
237 | ||
238 | entry->base = bt_get(base); | |
239 | g_ptr_array_add(stack->entries, entry); | |
240 | ||
241 | end: | |
242 | return ret; | |
243 | } | |
244 | ||
245 | static inline | |
246 | unsigned int stack_size(struct stack *stack) | |
247 | { | |
248 | assert(stack); | |
249 | ||
250 | return stack->entries->len; | |
251 | } | |
252 | ||
253 | static | |
254 | void stack_pop(struct stack *stack) | |
255 | { | |
256 | assert(stack); | |
257 | assert(stack_size(stack)); | |
258 | g_ptr_array_remove_index(stack->entries, stack->entries->len - 1); | |
259 | } | |
260 | ||
261 | static inline | |
262 | struct stack_entry *stack_top(struct stack *stack) | |
263 | { | |
264 | assert(stack); | |
265 | assert(stack_size(stack)); | |
266 | ||
267 | return g_ptr_array_index(stack->entries, stack->entries->len - 1); | |
268 | } | |
269 | ||
270 | static inline | |
271 | bool stack_empty(struct stack *stack) | |
272 | { | |
273 | return stack_size(stack) == 0; | |
274 | } | |
275 | ||
276 | static | |
277 | void stack_clear(struct stack *stack) | |
278 | { | |
279 | assert(stack); | |
280 | ||
281 | if (!stack_empty(stack)) { | |
282 | g_ptr_array_remove_range(stack->entries, 0, stack_size(stack)); | |
283 | } | |
284 | ||
285 | assert(stack_empty(stack)); | |
286 | } | |
287 | ||
288 | static inline | |
289 | enum bt_ctf_notif_iter_status notif_iter_status_from_m_status( | |
290 | enum bt_ctf_notif_iter_medium_status m_status) | |
291 | { | |
292 | return m_status; | |
293 | } | |
294 | ||
295 | static inline | |
296 | size_t buf_size_bits(struct bt_ctf_notif_iter *notit) | |
297 | { | |
298 | return BYTES_TO_BITS(notit->buf.sz); | |
299 | } | |
300 | ||
301 | static inline | |
302 | size_t buf_available_bits(struct bt_ctf_notif_iter *notit) | |
303 | { | |
304 | return buf_size_bits(notit) - notit->buf.at; | |
305 | } | |
306 | ||
307 | static inline | |
308 | size_t packet_at(struct bt_ctf_notif_iter *notit) | |
309 | { | |
310 | return notit->buf.packet_offset + notit->buf.at; | |
311 | } | |
312 | ||
313 | static inline | |
314 | size_t remaining_content_bits(struct bt_ctf_notif_iter *notit) | |
315 | { | |
316 | if (notit->cur_content_size == -1) { | |
317 | return -1; | |
318 | } | |
319 | ||
320 | return notit->cur_content_size - packet_at(notit); | |
321 | } | |
322 | ||
323 | static inline | |
324 | size_t remaining_packet_bits(struct bt_ctf_notif_iter *notit) | |
325 | { | |
326 | if (notit->cur_packet_size == -1) { | |
327 | return -1; | |
328 | } | |
329 | ||
330 | return notit->cur_packet_size - packet_at(notit); | |
331 | } | |
332 | ||
333 | static inline | |
334 | void buf_consume_bits(struct bt_ctf_notif_iter *notit, size_t incr) | |
335 | { | |
336 | notit->buf.at += incr; | |
337 | } | |
338 | ||
339 | static inline | |
340 | bool buf_has_enough_bits(struct bt_ctf_notif_iter *notit, size_t sz) | |
341 | { | |
342 | return buf_available_bits(notit) >= sz; | |
343 | } | |
344 | ||
345 | static | |
346 | enum bt_ctf_notif_iter_status request_medium_bytes(struct bt_ctf_notif_iter *notit) | |
347 | { | |
348 | uint8_t *buffer_addr; | |
349 | size_t buffer_sz; | |
350 | enum bt_ctf_notif_iter_medium_status m_status; | |
351 | ||
352 | m_status = notit->medium.medops.request_bytes( | |
353 | notit->medium.max_request_sz, &buffer_addr, | |
354 | &buffer_sz, notit->medium.data); | |
355 | if (m_status == BT_CTF_NOTIF_ITER_MEDIUM_STATUS_OK) { | |
356 | assert(buffer_sz != 0); | |
357 | ||
358 | /* New packet offset is old one + old size (in bits) */ | |
359 | notit->buf.packet_offset += buf_size_bits(notit); | |
360 | ||
361 | /* Restart at the beginning of the new medium buffer */ | |
362 | notit->buf.at = 0; | |
363 | ||
364 | /* New medium buffer size */ | |
365 | notit->buf.sz = buffer_sz; | |
366 | ||
367 | /* New medium buffer address */ | |
368 | notit->buf.addr = buffer_addr; | |
369 | } | |
370 | ||
371 | return notif_iter_status_from_m_status(m_status); | |
372 | } | |
373 | ||
374 | static inline | |
375 | enum bt_ctf_notif_iter_status buf_ensure_available_bits( | |
376 | struct bt_ctf_notif_iter *notit) | |
377 | { | |
378 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
379 | ||
380 | if (buf_available_bits(notit) == 0) { | |
381 | /* | |
382 | * This _cannot_ return BT_CTF_NOTIF_ITER_STATUS_OK | |
383 | * _and_ no bits. | |
384 | */ | |
385 | status = request_medium_bytes(notit); | |
386 | } | |
387 | ||
388 | return status; | |
389 | } | |
390 | ||
391 | static | |
392 | enum bt_ctf_notif_iter_status read_dscope_begin_state( | |
393 | struct bt_ctf_notif_iter *notit, | |
394 | struct bt_ctf_field_type *dscope_field_type, | |
395 | enum state done_state, enum state continue_state, | |
396 | struct bt_ctf_field **dscope_field) | |
397 | { | |
398 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
399 | enum bt_ctf_btr_status btr_status; | |
400 | size_t consumed_bits; | |
401 | ||
402 | status = buf_ensure_available_bits(notit); | |
403 | if (status != BT_CTF_NOTIF_ITER_STATUS_OK) { | |
404 | goto end; | |
405 | } | |
406 | ||
407 | bt_put(*dscope_field); | |
408 | notit->cur_dscope_field = dscope_field; | |
409 | consumed_bits = bt_ctf_btr_start(notit->btr, dscope_field_type, | |
410 | notit->buf.addr, notit->buf.at, packet_at(notit), | |
411 | notit->buf.sz, &btr_status); | |
412 | ||
413 | switch (btr_status) { | |
414 | case BT_CTF_BTR_STATUS_OK: | |
415 | /* type was read completely */ | |
416 | notit->state = done_state; | |
417 | break; | |
418 | case BT_CTF_BTR_STATUS_EOF: | |
419 | notit->state = continue_state; | |
420 | break; | |
421 | default: | |
422 | PERR("Binary type reader failed to start\n"); | |
423 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
424 | goto end; | |
425 | } | |
426 | ||
427 | /* Consume bits now since we know we're not in an error state */ | |
428 | buf_consume_bits(notit, consumed_bits); | |
429 | ||
430 | end: | |
431 | return status; | |
432 | } | |
433 | ||
434 | static | |
435 | enum bt_ctf_notif_iter_status read_dscope_continue_state( | |
436 | struct bt_ctf_notif_iter *notit, enum state done_state) | |
437 | { | |
438 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
439 | enum bt_ctf_btr_status btr_status; | |
440 | size_t consumed_bits; | |
441 | ||
442 | status = buf_ensure_available_bits(notit); | |
443 | if (status != BT_CTF_NOTIF_ITER_STATUS_OK) { | |
444 | goto end; | |
445 | } | |
446 | ||
447 | consumed_bits = bt_ctf_btr_continue(notit->btr, notit->buf.addr, | |
448 | notit->buf.sz, &btr_status); | |
449 | ||
450 | switch (btr_status) { | |
451 | case BT_CTF_BTR_STATUS_OK: | |
452 | /* Type was read completely */ | |
453 | notit->state = done_state; | |
454 | break; | |
455 | case BT_CTF_BTR_STATUS_EOF: | |
456 | /* Stay in this continue state */ | |
457 | break; | |
458 | default: | |
459 | PERR("Binary type reader failed to continue\n"); | |
460 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
461 | goto end; | |
462 | } | |
463 | ||
464 | /* Consume bits now since we know we're not in an error state */ | |
465 | buf_consume_bits(notit, consumed_bits); | |
466 | ||
467 | end: | |
468 | return status; | |
469 | } | |
470 | ||
471 | static | |
472 | void put_event_dscopes(struct bt_ctf_notif_iter *notit) | |
473 | { | |
474 | BT_PUT(notit->dscopes.stream_event_header); | |
475 | BT_PUT(notit->dscopes.stream_event_context); | |
476 | BT_PUT(notit->dscopes.event_context); | |
477 | BT_PUT(notit->dscopes.event_payload); | |
478 | } | |
479 | ||
480 | static | |
481 | void put_all_dscopes(struct bt_ctf_notif_iter *notit) | |
482 | { | |
483 | BT_PUT(notit->dscopes.trace_packet_header); | |
484 | BT_PUT(notit->dscopes.stream_packet_context); | |
485 | put_event_dscopes(notit); | |
486 | } | |
487 | ||
488 | static | |
489 | enum bt_ctf_notif_iter_status read_packet_header_begin_state( | |
490 | struct bt_ctf_notif_iter *notit) | |
491 | { | |
492 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
493 | struct bt_ctf_field_type *packet_header_type; | |
494 | ||
495 | /* Reset all dynamic scopes since we're reading a new packet */ | |
496 | put_all_dscopes(notit); | |
497 | BT_PUT(notit->packet); | |
498 | BT_PUT(notit->meta.stream_class); | |
499 | BT_PUT(notit->meta.event_class); | |
500 | ||
501 | /* Packet header type is common to the whole trace */ | |
502 | packet_header_type = bt_ctf_trace_get_packet_header_type( | |
503 | notit->meta.trace); | |
504 | if (!packet_header_type) { | |
505 | PERR("Failed to retrieve trace's packet header type\n"); | |
506 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
507 | goto end; | |
508 | } | |
509 | ||
510 | status = read_dscope_begin_state(notit, packet_header_type, | |
511 | STATE_AFTER_TRACE_PACKET_HEADER, | |
512 | STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE, | |
513 | ¬it->dscopes.trace_packet_header); | |
514 | ||
515 | end: | |
516 | BT_PUT(packet_header_type); | |
517 | ||
518 | return status; | |
519 | } | |
520 | ||
521 | static | |
522 | enum bt_ctf_notif_iter_status read_packet_header_continue_state( | |
523 | struct bt_ctf_notif_iter *notit) | |
524 | { | |
525 | return read_dscope_continue_state(notit, | |
526 | STATE_AFTER_TRACE_PACKET_HEADER); | |
527 | } | |
528 | ||
529 | static inline | |
530 | bool is_struct_type(struct bt_ctf_field_type *field_type) | |
531 | { | |
532 | return bt_ctf_field_type_get_type_id(field_type) == BT_CTF_TYPE_ID_STRUCT; | |
533 | } | |
534 | ||
535 | static inline | |
536 | bool is_variant_type(struct bt_ctf_field_type *field_type) | |
537 | { | |
538 | return bt_ctf_field_type_get_type_id(field_type) == BT_CTF_TYPE_ID_VARIANT; | |
539 | } | |
540 | ||
541 | static inline | |
542 | enum bt_ctf_notif_iter_status set_current_stream_class(struct bt_ctf_notif_iter *notit) | |
543 | { | |
544 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
545 | struct bt_ctf_field_type *packet_header_type; | |
546 | struct bt_ctf_field_type *stream_id_field_type = NULL; | |
547 | uint64_t stream_id; | |
548 | ||
549 | /* Is there any "stream_id" field in the packet header? */ | |
550 | packet_header_type = bt_ctf_trace_get_packet_header_type( | |
551 | notit->meta.trace); | |
552 | if (!packet_header_type) { | |
553 | PERR("Failed to retrieve trace's packet header type\n"); | |
554 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
555 | goto end; | |
556 | } | |
557 | ||
558 | assert(is_struct_type(packet_header_type)); | |
559 | ||
560 | // TODO: optimalize! | |
561 | stream_id_field_type = | |
562 | bt_ctf_field_type_structure_get_field_type_by_name( | |
563 | packet_header_type, "stream_id"); | |
564 | if (stream_id_field_type) { | |
565 | /* Find appropriate stream class using current stream ID */ | |
566 | struct bt_ctf_field *stream_id_field = NULL; | |
567 | int ret; | |
568 | ||
569 | assert(notit->dscopes.trace_packet_header); | |
570 | ||
571 | // TODO: optimalize! | |
572 | stream_id_field = bt_ctf_field_structure_get_field( | |
573 | notit->dscopes.trace_packet_header, "stream_id"); | |
574 | assert(stream_id_field); | |
575 | ret = bt_ctf_field_unsigned_integer_get_value( | |
576 | stream_id_field, &stream_id); | |
577 | assert(!ret); | |
578 | BT_PUT(stream_id_field); | |
579 | } else { | |
580 | /* Only one stream: pick the first stream class */ | |
581 | assert(bt_ctf_trace_get_stream_class_count( | |
582 | notit->meta.trace) == 1); | |
583 | stream_id = 0; | |
584 | } | |
585 | ||
586 | BT_PUT(notit->meta.stream_class); | |
587 | ||
588 | // TODO: get by ID | |
589 | notit->meta.stream_class = bt_ctf_trace_get_stream_class( | |
590 | notit->meta.trace, stream_id); | |
591 | if (!notit->meta.stream_class) { | |
592 | PERR("Cannot find stream class with ID %" PRIu64 "\n", | |
593 | stream_id); | |
594 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
595 | goto end; | |
596 | } | |
597 | ||
598 | end: | |
599 | BT_PUT(packet_header_type); | |
600 | BT_PUT(stream_id_field_type); | |
601 | ||
602 | return status; | |
603 | } | |
604 | ||
605 | static | |
606 | enum bt_ctf_notif_iter_status after_packet_header_state( | |
607 | struct bt_ctf_notif_iter *notit) | |
608 | { | |
609 | enum bt_ctf_notif_iter_status status; | |
610 | ||
611 | status = set_current_stream_class(notit); | |
612 | if (status == BT_CTF_NOTIF_ITER_STATUS_OK) { | |
613 | notit->state = STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN; | |
614 | } | |
615 | ||
616 | return status; | |
617 | } | |
618 | ||
619 | static | |
620 | enum bt_ctf_notif_iter_status read_packet_context_begin_state( | |
621 | struct bt_ctf_notif_iter *notit) | |
622 | { | |
623 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
624 | struct bt_ctf_field_type *packet_context_type; | |
625 | ||
626 | assert(notit->meta.stream_class); | |
627 | packet_context_type = bt_ctf_stream_class_get_packet_context_type( | |
628 | notit->meta.stream_class); | |
629 | if (!packet_context_type) { | |
630 | PERR("Failed to retrieve stream class's packet context\n"); | |
631 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
632 | goto end; | |
633 | } | |
634 | ||
635 | status = read_dscope_begin_state(notit, packet_context_type, | |
636 | STATE_AFTER_STREAM_PACKET_CONTEXT, | |
637 | STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE, | |
638 | ¬it->dscopes.stream_packet_context); | |
639 | ||
640 | end: | |
641 | BT_PUT(packet_context_type); | |
642 | ||
643 | return status; | |
644 | } | |
645 | ||
646 | static | |
647 | enum bt_ctf_notif_iter_status read_packet_context_continue_state( | |
648 | struct bt_ctf_notif_iter *notit) | |
649 | { | |
650 | return read_dscope_continue_state(notit, | |
651 | STATE_AFTER_STREAM_PACKET_CONTEXT); | |
652 | } | |
653 | ||
654 | static inline | |
655 | enum bt_ctf_notif_iter_status set_current_packet_content_sizes( | |
656 | struct bt_ctf_notif_iter *notit) | |
657 | { | |
658 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
659 | struct bt_ctf_field *packet_size_field = NULL; | |
660 | struct bt_ctf_field *content_size_field = NULL; | |
661 | uint64_t content_size = -1, packet_size = -1; | |
662 | ||
663 | assert(notit->dscopes.stream_packet_context); | |
664 | ||
665 | // TODO: optimalize! | |
666 | packet_size_field = bt_ctf_field_structure_get_field( | |
667 | notit->dscopes.stream_packet_context, "packet_size"); | |
668 | content_size_field = bt_ctf_field_structure_get_field( | |
669 | notit->dscopes.stream_packet_context, "content_size"); | |
670 | if (packet_size_field) { | |
671 | int ret = bt_ctf_field_unsigned_integer_get_value( | |
672 | packet_size_field, &packet_size); | |
673 | assert(!ret); | |
674 | ||
675 | if (packet_size == 0) { | |
676 | PERR("Decoded packet size is 0\n"); | |
677 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
678 | goto end; | |
679 | } else if ((packet_size % 8) != 0) { | |
680 | PERR("Decoded packet size is not a multiple of 8\n"); | |
681 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
682 | goto end; | |
683 | } | |
684 | } | |
685 | if (content_size_field) { | |
686 | int ret = bt_ctf_field_unsigned_integer_get_value( | |
687 | content_size_field, &content_size); | |
688 | assert(!ret); | |
689 | } else { | |
690 | content_size = packet_size; | |
691 | } | |
692 | ||
693 | notit->cur_packet_size = packet_size; | |
694 | notit->cur_content_size = content_size; | |
695 | ||
696 | end: | |
697 | BT_PUT(packet_size_field); | |
698 | BT_PUT(content_size_field); | |
699 | ||
700 | return status; | |
701 | } | |
702 | ||
703 | static | |
704 | enum bt_ctf_notif_iter_status after_packet_context_state( | |
705 | struct bt_ctf_notif_iter *notit) | |
706 | { | |
707 | enum bt_ctf_notif_iter_status status; | |
708 | ||
709 | status = set_current_packet_content_sizes(notit); | |
710 | if (status == BT_CTF_NOTIF_ITER_STATUS_OK) { | |
711 | notit->state = STATE_EMIT_NOTIF_NEW_PACKET; | |
712 | } | |
713 | ||
714 | return status; | |
715 | } | |
716 | ||
717 | static | |
718 | enum bt_ctf_notif_iter_status read_event_header_begin_state( | |
719 | struct bt_ctf_notif_iter *notit) | |
720 | { | |
721 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
722 | struct bt_ctf_field_type *event_header_type = NULL; | |
723 | ||
724 | /* Check if we have some content left */ | |
725 | if (notit->cur_content_size >= 0) { | |
726 | if (packet_at(notit) == notit->cur_content_size) { | |
727 | /* No more events! */ | |
728 | notit->state = STATE_EMIT_NOTIF_END_OF_PACKET; | |
729 | goto end; | |
730 | } else if (packet_at(notit) > notit->cur_content_size) { | |
731 | /* That's not supposed to happen */ | |
732 | PERR("Cursor passed packet's content size:\n"); | |
733 | PERR(" Decoded content size: %zu\n", | |
734 | notit->cur_content_size); | |
735 | PERR(" Cursor position: %zu\n", packet_at(notit)); | |
736 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
737 | goto end; | |
738 | } | |
739 | } | |
740 | ||
741 | event_header_type = bt_ctf_stream_class_get_event_header_type( | |
742 | notit->meta.stream_class); | |
743 | if (!event_header_type) { | |
744 | PERR("Failed to retrieve stream class's event header type\n"); | |
745 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
746 | goto end; | |
747 | } | |
748 | ||
749 | put_event_dscopes(notit); | |
750 | status = read_dscope_begin_state(notit, event_header_type, | |
751 | STATE_AFTER_STREAM_EVENT_HEADER, | |
752 | STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE, | |
753 | ¬it->dscopes.stream_event_header); | |
754 | ||
755 | end: | |
756 | BT_PUT(event_header_type); | |
757 | ||
758 | return status; | |
759 | } | |
760 | ||
761 | static | |
762 | enum bt_ctf_notif_iter_status read_event_header_continue_state( | |
763 | struct bt_ctf_notif_iter *notit) | |
764 | { | |
765 | return read_dscope_continue_state(notit, | |
766 | STATE_AFTER_STREAM_EVENT_HEADER); | |
767 | } | |
768 | ||
769 | static inline | |
770 | enum bt_ctf_notif_iter_status set_current_event_class(struct bt_ctf_notif_iter *notit) | |
771 | { | |
772 | /* | |
773 | * The assert() calls in this function are okay because it is | |
774 | * assumed here that all the metadata objects have been | |
775 | * validated for CTF correctness before decoding actual streams. | |
776 | */ | |
777 | ||
778 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
779 | struct bt_ctf_field_type *event_header_type; | |
780 | struct bt_ctf_field_type *id_field_type = NULL; | |
781 | struct bt_ctf_field_type *v_field_type = NULL; | |
782 | uint64_t event_id = -1ULL; | |
783 | int ret; | |
784 | ||
785 | event_header_type = bt_ctf_stream_class_get_event_header_type( | |
786 | notit->meta.stream_class); | |
787 | if (!event_header_type) { | |
788 | PERR("Failed to retrieve stream class's event header type\n"); | |
789 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
790 | goto end; | |
791 | } | |
792 | ||
793 | /* Is there any "id"/"v" field in the event header? */ | |
794 | assert(is_struct_type(event_header_type)); | |
795 | id_field_type = bt_ctf_field_type_structure_get_field_type_by_name( | |
796 | event_header_type, "id"); | |
797 | v_field_type = bt_ctf_field_type_structure_get_field_type_by_name( | |
798 | event_header_type, "v"); | |
799 | assert(notit->dscopes.stream_event_header); | |
800 | if (v_field_type) { | |
801 | /* | |
802 | * _ _____ _____ | |
803 | * | | |_ _|_ _| __ __ _ | |
804 | * | | | | | || '_ \ / _` | | |
805 | * | |___| | | || | | | (_| | S P E C I A L | |
806 | * |_____|_| |_||_| |_|\__, | C A S E ™ | |
807 | * |___/ | |
808 | */ | |
809 | struct bt_ctf_field *v_field = NULL; | |
810 | struct bt_ctf_field *v_struct_field = NULL; | |
811 | struct bt_ctf_field *v_struct_id_field = NULL; | |
812 | ||
813 | // TODO: optimalize! | |
814 | v_field = bt_ctf_field_structure_get_field( | |
815 | notit->dscopes.stream_event_header, "v"); | |
816 | assert(v_field); | |
817 | ||
818 | v_struct_field = | |
819 | bt_ctf_field_variant_get_current_field(v_field); | |
820 | if (!v_struct_field) { | |
821 | goto end_v_field_type; | |
822 | } | |
823 | ||
824 | // TODO: optimalize! | |
825 | v_struct_id_field = | |
826 | bt_ctf_field_structure_get_field(v_struct_field, "id"); | |
827 | if (!v_struct_id_field) { | |
828 | goto end_v_field_type; | |
829 | } | |
830 | ||
831 | ret = bt_ctf_field_unsigned_integer_get_value( | |
832 | v_struct_id_field, &event_id); | |
833 | if (ret) { | |
834 | event_id = -1ULL; | |
835 | } | |
836 | ||
837 | end_v_field_type: | |
838 | BT_PUT(v_field); | |
839 | BT_PUT(v_struct_field); | |
840 | BT_PUT(v_struct_id_field); | |
841 | } | |
842 | ||
843 | if (id_field_type && event_id == -1ULL) { | |
844 | /* Check "id" field */ | |
845 | struct bt_ctf_field *id_field = NULL; | |
846 | int ret; | |
847 | ||
848 | // TODO: optimalize! | |
849 | id_field = bt_ctf_field_structure_get_field( | |
850 | notit->dscopes.stream_event_header, "id"); | |
851 | assert(id_field); | |
852 | assert(bt_ctf_field_is_integer(id_field) || | |
853 | bt_ctf_field_is_enumeration(id_field)); | |
854 | ||
855 | if (bt_ctf_field_is_integer(id_field)) { | |
856 | ret = bt_ctf_field_unsigned_integer_get_value( | |
857 | id_field, &event_id); | |
858 | } else { | |
859 | struct bt_ctf_field *container; | |
860 | ||
861 | container = bt_ctf_field_enumeration_get_container( | |
862 | id_field); | |
863 | assert(container); | |
864 | ret = bt_ctf_field_unsigned_integer_get_value( | |
865 | container, &event_id); | |
866 | BT_PUT(container); | |
867 | } | |
868 | assert(!ret); | |
869 | BT_PUT(id_field); | |
870 | } | |
871 | ||
872 | if (event_id == -1ULL) { | |
873 | /* Event ID not found: single event? */ | |
874 | assert(bt_ctf_stream_class_get_event_class_count( | |
875 | notit->meta.stream_class) == 1); | |
876 | event_id = 0; | |
877 | } | |
878 | ||
879 | BT_PUT(notit->meta.event_class); | |
880 | notit->meta.event_class = bt_ctf_stream_class_get_event_class_by_id( | |
881 | notit->meta.stream_class, event_id); | |
882 | if (!notit->meta.event_class) { | |
883 | PERR("Cannot find event class with ID %" PRIu64 "\n", event_id); | |
884 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
885 | goto end; | |
886 | } | |
887 | ||
888 | end: | |
889 | BT_PUT(event_header_type); | |
890 | BT_PUT(id_field_type); | |
891 | BT_PUT(v_field_type); | |
892 | ||
893 | return status; | |
894 | } | |
895 | ||
896 | static | |
897 | enum bt_ctf_notif_iter_status after_event_header_state( | |
898 | struct bt_ctf_notif_iter *notit) | |
899 | { | |
900 | enum bt_ctf_notif_iter_status status; | |
901 | ||
902 | status = set_current_packet_content_sizes(notit); | |
903 | if (status != BT_CTF_NOTIF_ITER_STATUS_OK) { | |
904 | PERR("Failed to set current packet and content sizes\n"); | |
905 | goto end; | |
906 | } | |
907 | ||
908 | status = set_current_event_class(notit); | |
909 | if (status != BT_CTF_NOTIF_ITER_STATUS_OK) { | |
910 | PERR("Failed to set current event class\n"); | |
911 | goto end; | |
912 | } | |
913 | ||
914 | notit->state = STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN; | |
915 | ||
916 | end: | |
917 | return status; | |
918 | } | |
919 | ||
920 | static | |
921 | enum bt_ctf_notif_iter_status read_stream_event_context_begin_state( | |
922 | struct bt_ctf_notif_iter *notit) | |
923 | { | |
924 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
925 | struct bt_ctf_field_type *stream_event_context_type; | |
926 | ||
927 | stream_event_context_type = bt_ctf_stream_class_get_event_context_type( | |
928 | notit->meta.stream_class); | |
929 | if (!stream_event_context_type) { | |
930 | PERR("Failed to retrieve stream class's event context type\n"); | |
931 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
932 | goto end; | |
933 | } | |
934 | ||
935 | status = read_dscope_begin_state(notit, stream_event_context_type, | |
936 | STATE_DSCOPE_EVENT_CONTEXT_BEGIN, | |
937 | STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE, | |
938 | ¬it->dscopes.stream_event_context); | |
939 | ||
940 | end: | |
941 | BT_PUT(stream_event_context_type); | |
942 | ||
943 | return status; | |
944 | } | |
945 | ||
946 | static | |
947 | enum bt_ctf_notif_iter_status read_stream_event_context_continue_state( | |
948 | struct bt_ctf_notif_iter *notit) | |
949 | { | |
950 | return read_dscope_continue_state(notit, | |
951 | STATE_DSCOPE_EVENT_CONTEXT_BEGIN); | |
952 | } | |
953 | ||
954 | static | |
955 | enum bt_ctf_notif_iter_status read_event_context_begin_state( | |
956 | struct bt_ctf_notif_iter *notit) | |
957 | { | |
958 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
959 | struct bt_ctf_field_type *event_context_type; | |
960 | ||
961 | event_context_type = bt_ctf_event_class_get_context_type( | |
962 | notit->meta.event_class); | |
963 | if (!event_context_type) { | |
964 | PERR("Failed to retrieve event class's context type\n"); | |
965 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
966 | goto end; | |
967 | } | |
968 | ||
969 | status = read_dscope_begin_state(notit, event_context_type, | |
970 | STATE_DSCOPE_EVENT_PAYLOAD_BEGIN, | |
971 | STATE_DSCOPE_EVENT_CONTEXT_CONTINUE, | |
972 | ¬it->dscopes.event_context); | |
973 | ||
974 | end: | |
975 | BT_PUT(event_context_type); | |
976 | ||
977 | return status; | |
978 | } | |
979 | ||
980 | static | |
981 | enum bt_ctf_notif_iter_status read_event_context_continue_state( | |
982 | struct bt_ctf_notif_iter *notit) | |
983 | { | |
984 | return read_dscope_continue_state(notit, | |
985 | STATE_DSCOPE_EVENT_PAYLOAD_BEGIN); | |
986 | } | |
987 | ||
988 | static | |
989 | enum bt_ctf_notif_iter_status read_event_payload_begin_state( | |
990 | struct bt_ctf_notif_iter *notit) | |
991 | { | |
992 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
993 | struct bt_ctf_field_type *event_payload_type; | |
994 | ||
995 | event_payload_type = bt_ctf_event_class_get_payload_type( | |
996 | notit->meta.event_class); | |
997 | if (!event_payload_type) { | |
998 | PERR("Failed to retrieve event class's payload type\n"); | |
999 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
1000 | goto end; | |
1001 | } | |
1002 | ||
1003 | status = read_dscope_begin_state(notit, event_payload_type, | |
1004 | STATE_EMIT_NOTIF_EVENT, | |
1005 | STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE, | |
1006 | ¬it->dscopes.event_payload); | |
1007 | ||
1008 | end: | |
1009 | BT_PUT(event_payload_type); | |
1010 | ||
1011 | return status; | |
1012 | } | |
1013 | ||
1014 | static | |
1015 | enum bt_ctf_notif_iter_status read_event_payload_continue_state( | |
1016 | struct bt_ctf_notif_iter *notit) | |
1017 | { | |
1018 | return read_dscope_continue_state(notit, STATE_EMIT_NOTIF_EVENT); | |
1019 | } | |
1020 | ||
1021 | static | |
1022 | enum bt_ctf_notif_iter_status skip_packet_padding_state( | |
1023 | struct bt_ctf_notif_iter *notit) | |
1024 | { | |
1025 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
1026 | size_t bits_to_skip; | |
1027 | ||
1028 | assert(notit->cur_packet_size > 0); | |
1029 | bits_to_skip = notit->cur_packet_size - packet_at(notit); | |
1030 | if (bits_to_skip == 0) { | |
1031 | notit->state = STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN; | |
1032 | goto end; | |
1033 | } else { | |
1034 | size_t bits_to_consume; | |
1035 | status = buf_ensure_available_bits(notit); | |
1036 | if (status != BT_CTF_NOTIF_ITER_STATUS_OK) { | |
1037 | goto end; | |
1038 | } | |
1039 | ||
1040 | bits_to_consume = MIN(buf_available_bits(notit), bits_to_skip); | |
1041 | buf_consume_bits(notit, bits_to_consume); | |
1042 | bits_to_skip = notit->cur_packet_size - packet_at(notit); | |
1043 | if (bits_to_skip == 0) { | |
1044 | notit->state = STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN; | |
1045 | goto end; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | end: | |
1050 | return status; | |
1051 | } | |
1052 | ||
1053 | static inline | |
1054 | enum bt_ctf_notif_iter_status handle_state(struct bt_ctf_notif_iter *notit) | |
1055 | { | |
1056 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
1057 | ||
1058 | PDBG("Handling state %d\n", notit->state); | |
1059 | ||
1060 | // TODO: optimalize! | |
1061 | switch (notit->state) { | |
1062 | case STATE_INIT: | |
1063 | notit->state = STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN; | |
1064 | break; | |
1065 | case STATE_DSCOPE_TRACE_PACKET_HEADER_BEGIN: | |
1066 | status = read_packet_header_begin_state(notit); | |
1067 | break; | |
1068 | case STATE_DSCOPE_TRACE_PACKET_HEADER_CONTINUE: | |
1069 | status = read_packet_header_continue_state(notit); | |
1070 | break; | |
1071 | case STATE_AFTER_TRACE_PACKET_HEADER: | |
1072 | status = after_packet_header_state(notit); | |
1073 | break; | |
1074 | case STATE_DSCOPE_STREAM_PACKET_CONTEXT_BEGIN: | |
1075 | status = read_packet_context_begin_state(notit); | |
1076 | break; | |
1077 | case STATE_DSCOPE_STREAM_PACKET_CONTEXT_CONTINUE: | |
1078 | status = read_packet_context_continue_state(notit); | |
1079 | break; | |
1080 | case STATE_AFTER_STREAM_PACKET_CONTEXT: | |
1081 | status = after_packet_context_state(notit); | |
1082 | break; | |
1083 | case STATE_EMIT_NOTIF_NEW_PACKET: | |
1084 | notit->state = STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN; | |
1085 | break; | |
1086 | case STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN: | |
1087 | status = read_event_header_begin_state(notit); | |
1088 | break; | |
1089 | case STATE_DSCOPE_STREAM_EVENT_HEADER_CONTINUE: | |
1090 | status = read_event_header_continue_state(notit); | |
1091 | break; | |
1092 | case STATE_AFTER_STREAM_EVENT_HEADER: | |
1093 | status = after_event_header_state(notit); | |
1094 | break; | |
1095 | case STATE_DSCOPE_STREAM_EVENT_CONTEXT_BEGIN: | |
1096 | status = read_stream_event_context_begin_state(notit); | |
1097 | break; | |
1098 | case STATE_DSCOPE_STREAM_EVENT_CONTEXT_CONTINUE: | |
1099 | status = read_stream_event_context_continue_state(notit); | |
1100 | break; | |
1101 | case STATE_DSCOPE_EVENT_CONTEXT_BEGIN: | |
1102 | status = read_event_context_begin_state(notit); | |
1103 | break; | |
1104 | case STATE_DSCOPE_EVENT_CONTEXT_CONTINUE: | |
1105 | status = read_event_context_continue_state(notit); | |
1106 | break; | |
1107 | case STATE_DSCOPE_EVENT_PAYLOAD_BEGIN: | |
1108 | status = read_event_payload_begin_state(notit); | |
1109 | break; | |
1110 | case STATE_DSCOPE_EVENT_PAYLOAD_CONTINUE: | |
1111 | status = read_event_payload_continue_state(notit); | |
1112 | break; | |
1113 | case STATE_EMIT_NOTIF_EVENT: | |
1114 | notit->state = STATE_DSCOPE_STREAM_EVENT_HEADER_BEGIN; | |
1115 | break; | |
1116 | case STATE_SKIP_PACKET_PADDING: | |
1117 | status = skip_packet_padding_state(notit); | |
1118 | break; | |
1119 | case STATE_EMIT_NOTIF_END_OF_PACKET: | |
1120 | notit->state = STATE_SKIP_PACKET_PADDING; | |
1121 | break; | |
1122 | } | |
1123 | ||
1124 | return status; | |
1125 | } | |
1126 | ||
1127 | void bt_ctf_notif_iter_reset(struct bt_ctf_notif_iter *notit) | |
1128 | { | |
1129 | assert(notit); | |
1130 | stack_clear(notit->stack); | |
1131 | BT_PUT(notit->meta.stream_class); | |
1132 | BT_PUT(notit->meta.event_class); | |
1133 | BT_PUT(notit->packet); | |
1134 | put_all_dscopes(notit); | |
1135 | notit->buf.addr = NULL; | |
1136 | notit->buf.sz = 0; | |
1137 | notit->buf.at = 0; | |
1138 | notit->buf.packet_offset = 0; | |
1139 | notit->state = STATE_INIT; | |
1140 | notit->cur_content_size = -1; | |
1141 | notit->cur_packet_size = -1; | |
1142 | } | |
1143 | ||
1144 | static | |
1145 | struct bt_ctf_field *get_next_field(struct bt_ctf_notif_iter *notit) | |
1146 | { | |
1147 | struct bt_ctf_field *next_field = NULL; | |
1148 | struct bt_ctf_field *base_field; | |
1149 | struct bt_ctf_field_type *base_type; | |
1150 | size_t index; | |
1151 | ||
1152 | assert(!stack_empty(notit->stack)); | |
1153 | index = stack_top(notit->stack)->index; | |
1154 | base_field = stack_top(notit->stack)->base; | |
1155 | base_type = bt_ctf_field_get_type(base_field); | |
1156 | if (!base_type) { | |
1157 | PERR("Failed to get base field's type\n"); | |
1158 | goto end; | |
1159 | } | |
1160 | ||
1161 | switch (bt_ctf_field_type_get_type_id(base_type)) { | |
1162 | case BT_CTF_TYPE_ID_STRUCT: | |
1163 | next_field = bt_ctf_field_structure_get_field_by_index( | |
1164 | base_field, index); | |
1165 | break; | |
1166 | case BT_CTF_TYPE_ID_ARRAY: | |
1167 | next_field = bt_ctf_field_array_get_field(base_field, index); | |
1168 | break; | |
1169 | case BT_CTF_TYPE_ID_SEQUENCE: | |
1170 | next_field = bt_ctf_field_sequence_get_field(base_field, index); | |
1171 | break; | |
1172 | case BT_CTF_TYPE_ID_VARIANT: | |
1173 | next_field = bt_ctf_field_variant_get_current_field(base_field); | |
1174 | break; | |
1175 | default: | |
1176 | assert(false); | |
1177 | break; | |
1178 | } | |
1179 | ||
1180 | end: | |
1181 | BT_PUT(base_type); | |
1182 | ||
1183 | return next_field; | |
1184 | } | |
1185 | ||
1186 | static | |
1187 | enum bt_ctf_btr_status btr_signed_int_cb(int64_t value, | |
1188 | struct bt_ctf_field_type *type, void *data) | |
1189 | { | |
1190 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1191 | struct bt_ctf_field *field = NULL; | |
1192 | struct bt_ctf_field *int_field = NULL; | |
1193 | struct bt_ctf_notif_iter *notit = data; | |
1194 | int ret; | |
1195 | ||
1196 | /* create next field */ | |
1197 | field = get_next_field(notit); | |
1198 | if (!field) { | |
1199 | PERR("Failed to get next field (signed int)\n"); | |
1200 | status = BT_CTF_BTR_STATUS_ERROR; | |
1201 | goto end; | |
1202 | } | |
1203 | ||
1204 | switch(bt_ctf_field_type_get_type_id(type)) { | |
1205 | case BT_CTF_TYPE_ID_INTEGER: | |
1206 | /* Integer field is created field */ | |
1207 | BT_MOVE(int_field, field); | |
1208 | break; | |
1209 | case BT_CTF_TYPE_ID_ENUM: | |
1210 | int_field = bt_ctf_field_enumeration_get_container(field); | |
1211 | break; | |
1212 | default: | |
1213 | break; | |
1214 | } | |
1215 | ||
1216 | if (!int_field) { | |
1217 | PERR("Failed to get integer field\n"); | |
1218 | status = BT_CTF_BTR_STATUS_ERROR; | |
1219 | goto end; | |
1220 | } | |
1221 | ||
1222 | ret = bt_ctf_field_signed_integer_set_value(int_field, value); | |
1223 | assert(!ret); | |
1224 | stack_top(notit->stack)->index++; | |
1225 | ||
1226 | end: | |
1227 | BT_PUT(field); | |
1228 | BT_PUT(int_field); | |
1229 | ||
1230 | return status; | |
1231 | } | |
1232 | ||
1233 | static | |
1234 | enum bt_ctf_btr_status btr_unsigned_int_cb(uint64_t value, | |
1235 | struct bt_ctf_field_type *type, void *data) | |
1236 | { | |
1237 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1238 | struct bt_ctf_field *field = NULL; | |
1239 | struct bt_ctf_field *int_field = NULL; | |
1240 | struct bt_ctf_notif_iter *notit = data; | |
1241 | int ret; | |
1242 | ||
1243 | /* Create next field */ | |
1244 | field = get_next_field(notit); | |
1245 | if (!field) { | |
1246 | PERR("Failed to get next field (unsigned int)\n"); | |
1247 | status = BT_CTF_BTR_STATUS_ERROR; | |
1248 | goto end; | |
1249 | } | |
1250 | ||
1251 | switch(bt_ctf_field_type_get_type_id(type)) { | |
1252 | case BT_CTF_TYPE_ID_INTEGER: | |
1253 | /* Integer field is created field */ | |
1254 | BT_MOVE(int_field, field); | |
1255 | break; | |
1256 | case BT_CTF_TYPE_ID_ENUM: | |
1257 | int_field = bt_ctf_field_enumeration_get_container(field); | |
1258 | break; | |
1259 | default: | |
1260 | break; | |
1261 | } | |
1262 | ||
1263 | if (!int_field) { | |
1264 | PERR("Failed to get integer field\n"); | |
1265 | status = BT_CTF_BTR_STATUS_ERROR; | |
1266 | goto end; | |
1267 | } | |
1268 | ||
1269 | ret = bt_ctf_field_unsigned_integer_set_value(int_field, value); | |
1270 | assert(!ret); | |
1271 | stack_top(notit->stack)->index++; | |
1272 | ||
1273 | end: | |
1274 | BT_PUT(field); | |
1275 | BT_PUT(int_field); | |
1276 | ||
1277 | return status; | |
1278 | } | |
1279 | ||
1280 | static | |
1281 | enum bt_ctf_btr_status btr_floating_point_cb(double value, | |
1282 | struct bt_ctf_field_type *type, void *data) | |
1283 | { | |
1284 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1285 | struct bt_ctf_field *field = NULL; | |
1286 | struct bt_ctf_notif_iter *notit = data; | |
1287 | int ret; | |
1288 | ||
1289 | /* Create next field */ | |
1290 | field = get_next_field(notit); | |
1291 | if (!field) { | |
1292 | PERR("Failed to get next field (floating point number)\n"); | |
1293 | status = BT_CTF_BTR_STATUS_ERROR; | |
1294 | goto end; | |
1295 | } | |
1296 | ||
1297 | ret = bt_ctf_field_floating_point_set_value(field, value); | |
1298 | assert(!ret); | |
1299 | stack_top(notit->stack)->index++; | |
1300 | ||
1301 | end: | |
1302 | BT_PUT(field); | |
1303 | ||
1304 | return status; | |
1305 | } | |
1306 | ||
1307 | static | |
1308 | enum bt_ctf_btr_status btr_string_begin_cb( | |
1309 | struct bt_ctf_field_type *type, void *data) | |
1310 | { | |
1311 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1312 | struct bt_ctf_field *field = NULL; | |
1313 | struct bt_ctf_notif_iter *notit = data; | |
1314 | int ret; | |
1315 | ||
1316 | /* Create next field */ | |
1317 | field = get_next_field(notit); | |
1318 | if (!field) { | |
1319 | PERR("Failed to get next field (string)\n"); | |
1320 | status = BT_CTF_BTR_STATUS_ERROR; | |
1321 | goto end; | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Push on stack. Not a compound type per se, but we know that only | |
1326 | * btr_string_cb() may be called between this call and a subsequent | |
1327 | * call to btr_string_end_cb(). | |
1328 | */ | |
1329 | ret = stack_push(notit->stack, field); | |
1330 | if (ret) { | |
1331 | PERR("Failed to push string field onto the stack\n"); | |
1332 | status = BT_CTF_BTR_STATUS_ERROR; | |
1333 | goto end; | |
1334 | } | |
1335 | ||
1336 | end: | |
1337 | BT_PUT(field); | |
1338 | ||
1339 | return status; | |
1340 | } | |
1341 | ||
1342 | static | |
1343 | enum bt_ctf_btr_status btr_string_cb(const char *value, | |
1344 | size_t len, struct bt_ctf_field_type *type, void *data) | |
1345 | { | |
1346 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1347 | struct bt_ctf_field *field = NULL; | |
1348 | struct bt_ctf_notif_iter *notit = data; | |
1349 | int ret; | |
1350 | ||
1351 | /* Get string field */ | |
1352 | field = stack_top(notit->stack)->base; | |
1353 | assert(field); | |
1354 | ||
1355 | /* Append current string */ | |
1356 | ret = bt_ctf_field_string_append_len(field, value, len); | |
1357 | if (ret) { | |
1358 | PERR("Failed to append a string to a string field\n"); | |
1359 | status = BT_CTF_BTR_STATUS_ERROR; | |
1360 | goto end; | |
1361 | } | |
1362 | ||
1363 | end: | |
1364 | return status; | |
1365 | } | |
1366 | ||
1367 | static | |
1368 | enum bt_ctf_btr_status btr_string_end_cb( | |
1369 | struct bt_ctf_field_type *type, void *data) | |
1370 | { | |
1371 | struct bt_ctf_notif_iter *notit = data; | |
1372 | ||
1373 | /* Pop string field */ | |
1374 | stack_pop(notit->stack); | |
1375 | ||
1376 | /* Go to next field */ | |
1377 | stack_top(notit->stack)->index++; | |
1378 | ||
1379 | return BT_CTF_BTR_STATUS_OK; | |
1380 | } | |
1381 | ||
1382 | enum bt_ctf_btr_status btr_compound_begin_cb( | |
1383 | struct bt_ctf_field_type *type, void *data) | |
1384 | { | |
1385 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1386 | struct bt_ctf_notif_iter *notit = data; | |
1387 | struct bt_ctf_field *field; | |
1388 | int ret; | |
1389 | ||
1390 | /* Create field */ | |
1391 | if (stack_empty(notit->stack)) { | |
1392 | /* Root: create dynamic scope field */ | |
1393 | *notit->cur_dscope_field = bt_ctf_field_create(type); | |
1394 | field = *notit->cur_dscope_field; | |
1395 | ||
1396 | /* | |
1397 | * Field will be put at the end of this function | |
1398 | * (stack_push() will take one reference, but this | |
1399 | * reference is lost upon the equivalent stack_pop() | |
1400 | * later), so also get it for our context to own it. | |
1401 | */ | |
1402 | bt_get(*notit->cur_dscope_field); | |
1403 | } else { | |
1404 | field = get_next_field(notit); | |
1405 | } | |
1406 | ||
1407 | if (!field) { | |
1408 | PERR("Failed to get next field or create dynamic scope field\n"); | |
1409 | status = BT_CTF_BTR_STATUS_ERROR; | |
1410 | goto end; | |
1411 | } | |
1412 | ||
1413 | /* Push field */ | |
1414 | ret = stack_push(notit->stack, field); | |
1415 | if (ret) { | |
1416 | PERR("Failed to push compound field onto the stack\n"); | |
1417 | status = BT_CTF_BTR_STATUS_ERROR; | |
1418 | goto end; | |
1419 | } | |
1420 | ||
1421 | end: | |
1422 | BT_PUT(field); | |
1423 | ||
1424 | return status; | |
1425 | } | |
1426 | ||
1427 | enum bt_ctf_btr_status btr_compound_end_cb( | |
1428 | struct bt_ctf_field_type *type, void *data) | |
1429 | { | |
1430 | struct bt_ctf_notif_iter *notit = data; | |
1431 | ||
1432 | assert(!stack_empty(notit->stack)); | |
1433 | ||
1434 | /* Pop stack */ | |
1435 | stack_pop(notit->stack); | |
1436 | ||
1437 | /* If the stack is not empty, increment the base's index */ | |
1438 | if (!stack_empty(notit->stack)) { | |
1439 | stack_top(notit->stack)->index++; | |
1440 | } | |
1441 | ||
1442 | return BT_CTF_BTR_STATUS_OK; | |
1443 | } | |
1444 | ||
1445 | static | |
1446 | struct bt_ctf_field *resolve_field(struct bt_ctf_notif_iter *notit, | |
1447 | struct bt_ctf_field_path *path) | |
1448 | { | |
1449 | struct bt_ctf_field *field = NULL; | |
1450 | unsigned int i; | |
1451 | ||
1452 | switch (bt_ctf_field_path_get_root_scope(path)) { | |
1453 | case BT_CTF_SCOPE_TRACE_PACKET_HEADER: | |
1454 | field = notit->dscopes.trace_packet_header; | |
1455 | break; | |
1456 | case BT_CTF_SCOPE_STREAM_PACKET_CONTEXT: | |
1457 | field = notit->dscopes.stream_packet_context; | |
1458 | break; | |
1459 | case BT_CTF_SCOPE_STREAM_EVENT_HEADER: | |
1460 | field = notit->dscopes.stream_event_header; | |
1461 | break; | |
1462 | case BT_CTF_SCOPE_STREAM_EVENT_CONTEXT: | |
1463 | field = notit->dscopes.stream_event_context; | |
1464 | break; | |
1465 | case BT_CTF_SCOPE_EVENT_CONTEXT: | |
1466 | field = notit->dscopes.event_context; | |
1467 | break; | |
1468 | case BT_CTF_SCOPE_EVENT_FIELDS: | |
1469 | field = notit->dscopes.event_payload; | |
1470 | break; | |
1471 | default: | |
1472 | break; | |
1473 | } | |
1474 | ||
1475 | if (!field) { | |
1476 | goto end; | |
1477 | } | |
1478 | ||
1479 | bt_get(field); | |
1480 | ||
1481 | for (i = 0; i < bt_ctf_field_path_get_index_count(path); ++i) { | |
1482 | struct bt_ctf_field *next_field = NULL; | |
1483 | struct bt_ctf_field_type *field_type; | |
1484 | int index = bt_ctf_field_path_get_index(path, i); | |
1485 | ||
1486 | field_type = bt_ctf_field_get_type(field); | |
1487 | if (!field_type) { | |
1488 | BT_PUT(field); | |
1489 | goto end; | |
1490 | } | |
1491 | ||
1492 | if (is_struct_type(field_type)) { | |
1493 | next_field = bt_ctf_field_structure_get_field_by_index( | |
1494 | field, index); | |
1495 | } else if (is_variant_type(field_type)) { | |
1496 | next_field = | |
1497 | bt_ctf_field_variant_get_current_field(field); | |
1498 | } | |
1499 | ||
1500 | BT_PUT(field); | |
1501 | BT_PUT(field_type); | |
1502 | ||
1503 | if (!next_field) { | |
1504 | goto end; | |
1505 | } | |
1506 | ||
1507 | /* Move next field -> field */ | |
1508 | BT_MOVE(field, next_field); | |
1509 | } | |
1510 | ||
1511 | end: | |
1512 | return field; | |
1513 | } | |
1514 | ||
1515 | static | |
1516 | int64_t btr_get_sequence_length_cb(struct bt_ctf_field_type *type, void *data) | |
1517 | { | |
1518 | int64_t ret = -1; | |
1519 | int iret; | |
1520 | struct bt_ctf_field_path *field_path; | |
1521 | struct bt_ctf_notif_iter *notit = data; | |
1522 | struct bt_ctf_field *field = NULL; | |
1523 | uint64_t length; | |
1524 | ||
1525 | field_path = bt_ctf_field_type_sequence_get_length_field_path(type); | |
1526 | if (!field_path) { | |
1527 | goto end; | |
1528 | } | |
1529 | ||
1530 | field = resolve_field(notit, field_path); | |
1531 | if (!field) { | |
1532 | goto end; | |
1533 | } | |
1534 | ||
1535 | iret = bt_ctf_field_unsigned_integer_get_value(field, &length); | |
1536 | if (iret) { | |
1537 | goto end; | |
1538 | } | |
1539 | ||
1540 | ret = (int64_t) length; | |
1541 | ||
1542 | end: | |
1543 | BT_PUT(field); | |
1544 | BT_PUT(field_path); | |
1545 | ||
1546 | return ret; | |
1547 | } | |
1548 | ||
1549 | static | |
1550 | struct bt_ctf_field_type *btr_get_variant_type_cb( | |
1551 | struct bt_ctf_field_type *type, void *data) | |
1552 | { | |
1553 | struct bt_ctf_field_path *path; | |
1554 | struct bt_ctf_notif_iter *notit = data; | |
1555 | struct bt_ctf_field *tag_field = NULL; | |
1556 | struct bt_ctf_field *selected_field = NULL; | |
1557 | struct bt_ctf_field_type *selected_field_type = NULL; | |
1558 | ||
1559 | path = bt_ctf_field_type_variant_get_tag_field_path(type); | |
1560 | if (!path) { | |
1561 | goto end; | |
1562 | } | |
1563 | ||
1564 | tag_field = resolve_field(notit, path); | |
1565 | if (!tag_field) { | |
1566 | goto end; | |
1567 | } | |
1568 | ||
1569 | /* | |
1570 | * We found the enumeration tag field instance which should be | |
1571 | * able to select a current field for this variant. This | |
1572 | * callback function we're in is called _after_ | |
1573 | * compound_begin(), so the current stack top's base field is | |
1574 | * the variant field in question. We get the selected field here | |
1575 | * thanks to this tag field (thus creating the selected field), | |
1576 | * which will also provide us with its type. Then, this field | |
1577 | * will remain the current selected one until the next callback | |
1578 | * function call which is used to fill the current selected | |
1579 | * field. | |
1580 | */ | |
1581 | selected_field = bt_ctf_field_variant_get_field( | |
1582 | stack_top(notit->stack)->base, tag_field); | |
1583 | if (!selected_field) { | |
1584 | goto end; | |
1585 | } | |
1586 | ||
1587 | selected_field_type = bt_ctf_field_get_type(selected_field); | |
1588 | ||
1589 | end: | |
1590 | BT_PUT(tag_field); | |
1591 | BT_PUT(selected_field); | |
1592 | ||
1593 | return selected_field_type; | |
1594 | } | |
1595 | ||
1596 | static struct bt_ctf_event *create_event(struct bt_ctf_notif_iter *notit) | |
1597 | { | |
1598 | struct bt_ctf_event *event; | |
1599 | int ret; | |
1600 | ||
1601 | /* Create event object */ | |
1602 | event = bt_ctf_event_create(notit->meta.event_class); | |
1603 | if (!event) { | |
1604 | goto error; | |
1605 | } | |
1606 | ||
1607 | /* Set header, stream event context, context, and payload fields */ | |
1608 | ret = bt_ctf_event_set_header(event, | |
1609 | notit->dscopes.stream_event_header); | |
1610 | if (ret) { | |
1611 | goto error; | |
1612 | } | |
1613 | ||
1614 | ret = bt_ctf_event_set_stream_event_context(event, | |
1615 | notit->dscopes.stream_event_context); | |
1616 | if (ret) { | |
1617 | goto error; | |
1618 | } | |
1619 | ||
1620 | ret = bt_ctf_event_set_event_context(event, | |
1621 | notit->dscopes.event_context); | |
1622 | if (ret) { | |
1623 | goto error; | |
1624 | } | |
1625 | ||
1626 | ret = bt_ctf_event_set_payload_field(event, | |
1627 | notit->dscopes.event_payload); | |
1628 | if (ret) { | |
1629 | goto error; | |
1630 | } | |
1631 | ||
1632 | /* Associate with current packet */ | |
1633 | assert(notit->packet); | |
1634 | ret = bt_ctf_event_set_packet(event, notit->packet); | |
1635 | if (ret) { | |
1636 | goto error; | |
1637 | } | |
1638 | ||
1639 | goto end; | |
1640 | ||
1641 | error: | |
1642 | BT_PUT(event); | |
1643 | ||
1644 | end: | |
1645 | return event; | |
1646 | } | |
1647 | ||
1648 | static void create_packet(struct bt_ctf_notif_iter *notit) | |
1649 | { | |
1650 | int ret; | |
1651 | struct bt_ctf_stream *stream = NULL; | |
1652 | struct bt_ctf_packet *packet = NULL; | |
1653 | ||
1654 | /* Ask the user for the stream */ | |
1655 | stream = notit->medium.medops.get_stream(notit->meta.stream_class, | |
1656 | notit->medium.data); | |
1657 | if (!stream) { | |
1658 | goto error; | |
1659 | } | |
1660 | ||
1661 | /* Create packet */ | |
1662 | packet = bt_ctf_packet_create(stream); | |
1663 | if (!packet) { | |
1664 | goto error; | |
1665 | } | |
1666 | ||
1667 | /* Set packet's context and header fields */ | |
1668 | if (notit->dscopes.trace_packet_header) { | |
1669 | ret = bt_ctf_packet_set_header(packet, | |
1670 | notit->dscopes.trace_packet_header); | |
1671 | if (ret) { | |
1672 | goto error; | |
1673 | } | |
1674 | } | |
1675 | ||
1676 | if (notit->dscopes.stream_packet_context) { | |
1677 | ret = bt_ctf_packet_set_context(packet, | |
1678 | notit->dscopes.stream_packet_context); | |
1679 | if (ret) { | |
1680 | goto error; | |
1681 | } | |
1682 | } | |
1683 | ||
1684 | goto end; | |
1685 | ||
1686 | error: | |
1687 | BT_PUT(packet); | |
1688 | ||
1689 | end: | |
1690 | BT_MOVE(notit->packet, packet); | |
1691 | } | |
1692 | ||
1693 | static void notify_new_packet(struct bt_ctf_notif_iter *notit, | |
1694 | struct bt_ctf_notif_iter_notif **notification) | |
1695 | { | |
1696 | struct bt_ctf_notif_iter_notif_new_packet *rnotif; | |
1697 | ||
1698 | rnotif = g_new0(struct bt_ctf_notif_iter_notif_new_packet, 1); | |
1699 | if (!rnotif) { | |
1700 | goto error; | |
1701 | } | |
1702 | ||
1703 | rnotif->base.type = BT_CTF_NOTIF_ITER_NOTIF_NEW_PACKET; | |
1704 | ||
1705 | /* Create packet */ | |
1706 | create_packet(notit); | |
1707 | if (!notit->packet) { | |
1708 | goto error; | |
1709 | } | |
1710 | ||
1711 | rnotif->packet = bt_get(notit->packet); | |
1712 | *notification = (struct bt_ctf_notif_iter_notif *) rnotif; | |
1713 | return; | |
1714 | ||
1715 | error: | |
1716 | bt_ctf_notif_iter_notif_destroy(rnotif); | |
1717 | } | |
1718 | ||
1719 | static void notify_end_of_packet(struct bt_ctf_notif_iter *notit, | |
1720 | struct bt_ctf_notif_iter_notif **notification) | |
1721 | { | |
1722 | struct bt_ctf_notif_iter_notif_end_of_packet *rnotif; | |
1723 | ||
1724 | rnotif = g_new0(struct bt_ctf_notif_iter_notif_end_of_packet, 1); | |
1725 | if (!rnotif) { | |
1726 | goto error; | |
1727 | } | |
1728 | ||
1729 | rnotif->base.type = BT_CTF_NOTIF_ITER_NOTIF_END_OF_PACKET; | |
1730 | ||
1731 | /* Create packet */ | |
1732 | create_packet(notit); | |
1733 | if (!notit->packet) { | |
1734 | goto error; | |
1735 | } | |
1736 | ||
1737 | rnotif->packet = bt_get(notit->packet); | |
1738 | *notification = (struct bt_ctf_notif_iter_notif *) rnotif; | |
1739 | return; | |
1740 | ||
1741 | error: | |
1742 | bt_ctf_notif_iter_notif_destroy(rnotif); | |
1743 | } | |
1744 | ||
1745 | static void notify_event(struct bt_ctf_notif_iter *notit, | |
1746 | struct bt_ctf_notif_iter_notif **notification) | |
1747 | { | |
1748 | struct bt_ctf_notif_iter_notif_event *rnotif; | |
1749 | struct bt_ctf_event *event = NULL; | |
1750 | ||
1751 | rnotif = g_new0(struct bt_ctf_notif_iter_notif_event, 1); | |
1752 | if (!rnotif) { | |
1753 | goto error; | |
1754 | } | |
1755 | ||
1756 | rnotif->base.type = BT_CTF_NOTIF_ITER_NOTIF_EVENT; | |
1757 | ||
1758 | /* Create event */ | |
1759 | event = create_event(notit); | |
1760 | if (!event) { | |
1761 | goto error; | |
1762 | } | |
1763 | ||
1764 | BT_MOVE(rnotif->event, event); | |
1765 | *notification = (struct bt_ctf_notif_iter_notif *) rnotif; | |
1766 | return; | |
1767 | ||
1768 | error: | |
1769 | BT_PUT(event); | |
1770 | bt_ctf_notif_iter_notif_destroy(rnotif); | |
1771 | } | |
1772 | ||
1773 | void bt_ctf_notif_iter_notif_destroy(void *vnotif) | |
1774 | { | |
1775 | struct bt_ctf_notif_iter_notif *notif = vnotif; | |
1776 | ||
1777 | switch (notif->type) { | |
1778 | case BT_CTF_NOTIF_ITER_NOTIF_NEW_PACKET: | |
1779 | { | |
1780 | struct bt_ctf_notif_iter_notif_new_packet *rnotif = | |
1781 | (struct bt_ctf_notif_iter_notif_new_packet *) notif; | |
1782 | ||
1783 | BT_PUT(rnotif->packet); | |
1784 | break; | |
1785 | } | |
1786 | case BT_CTF_NOTIF_ITER_NOTIF_END_OF_PACKET: | |
1787 | { | |
1788 | struct bt_ctf_notif_iter_notif_end_of_packet *rnotif = | |
1789 | (struct bt_ctf_notif_iter_notif_end_of_packet *) notif; | |
1790 | ||
1791 | BT_PUT(rnotif->packet); | |
1792 | break; | |
1793 | } | |
1794 | case BT_CTF_NOTIF_ITER_NOTIF_EVENT: | |
1795 | { | |
1796 | struct bt_ctf_notif_iter_notif_event *rnotif = | |
1797 | (struct bt_ctf_notif_iter_notif_event *) notif; | |
1798 | ||
1799 | BT_PUT(rnotif->event); | |
1800 | break; | |
1801 | } | |
1802 | default: | |
1803 | assert(false); | |
1804 | } | |
1805 | ||
1806 | g_free(notif); | |
1807 | } | |
1808 | ||
1809 | struct bt_ctf_notif_iter *bt_ctf_notif_iter_create(struct bt_ctf_trace *trace, | |
1810 | size_t max_request_sz, | |
1811 | struct bt_ctf_notif_iter_medium_ops medops, | |
1812 | void *data, FILE *err_stream) | |
1813 | { | |
1814 | struct bt_ctf_notif_iter *notit = NULL; | |
1815 | struct bt_ctf_btr_cbs cbs = { | |
1816 | .types = { | |
1817 | .signed_int = btr_signed_int_cb, | |
1818 | .unsigned_int = btr_unsigned_int_cb, | |
1819 | .floating_point = btr_floating_point_cb, | |
1820 | .string_begin = btr_string_begin_cb, | |
1821 | .string = btr_string_cb, | |
1822 | .string_end = btr_string_end_cb, | |
1823 | .compound_begin = btr_compound_begin_cb, | |
1824 | .compound_end = btr_compound_end_cb, | |
1825 | }, | |
1826 | .query = { | |
1827 | .get_sequence_length = btr_get_sequence_length_cb, | |
1828 | .get_variant_type = btr_get_variant_type_cb, | |
1829 | }, | |
1830 | }; | |
1831 | ||
1832 | assert(trace); | |
1833 | assert(medops.request_bytes); | |
1834 | notit = g_new0(struct bt_ctf_notif_iter, 1); | |
1835 | if (!notit) { | |
1836 | PERR("Failed to allocate memory for CTF notification iterator\n"); | |
1837 | goto end; | |
1838 | } | |
1839 | ||
1840 | notit->meta.trace = trace; | |
1841 | bt_get(notit->meta.trace); | |
1842 | notit->medium.medops = medops; | |
1843 | notit->medium.max_request_sz = max_request_sz; | |
1844 | notit->medium.data = data; | |
1845 | notit->err_stream = err_stream; | |
1846 | notit->stack = stack_new(notit); | |
1847 | if (!notit->stack) { | |
1848 | PERR("Failed to create stack\n"); | |
1849 | bt_ctf_notif_iter_destroy(notit); | |
1850 | notit = NULL; | |
1851 | goto end; | |
1852 | } | |
1853 | ||
1854 | notit->btr = bt_ctf_btr_create(cbs, notit, err_stream); | |
1855 | if (!notit->btr) { | |
1856 | PERR("Failed to create binary type reader\n"); | |
1857 | bt_ctf_notif_iter_destroy(notit); | |
1858 | notit = NULL; | |
1859 | goto end; | |
1860 | } | |
1861 | ||
1862 | bt_ctf_notif_iter_reset(notit); | |
1863 | ||
1864 | end: | |
1865 | return notit; | |
1866 | } | |
1867 | ||
1868 | void bt_ctf_notif_iter_destroy(struct bt_ctf_notif_iter *notit) | |
1869 | { | |
1870 | BT_PUT(notit->meta.trace); | |
1871 | BT_PUT(notit->meta.stream_class); | |
1872 | BT_PUT(notit->meta.event_class); | |
1873 | BT_PUT(notit->packet); | |
1874 | put_all_dscopes(notit); | |
1875 | ||
1876 | if (notit->stack) { | |
1877 | stack_destroy(notit->stack); | |
1878 | } | |
1879 | ||
1880 | if (notit->btr) { | |
1881 | bt_ctf_btr_destroy(notit->btr); | |
1882 | } | |
1883 | ||
1884 | g_free(notit); | |
1885 | } | |
1886 | ||
1887 | enum bt_ctf_notif_iter_status bt_ctf_notif_iter_get_next_notification( | |
1888 | struct bt_ctf_notif_iter *notit, | |
1889 | struct bt_ctf_notif_iter_notif **notification) | |
1890 | { | |
1891 | enum bt_ctf_notif_iter_status status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
1892 | ||
1893 | assert(notit); | |
1894 | assert(notification); | |
1895 | ||
1896 | while (true) { | |
1897 | status = handle_state(notit); | |
1898 | if (status != BT_CTF_NOTIF_ITER_STATUS_OK) { | |
1899 | if (status == BT_CTF_NOTIF_ITER_STATUS_EOF) { | |
1900 | PDBG("Medium operation reported end of file\n"); | |
1901 | } else { | |
1902 | PERR("Failed to handle state:\n"); | |
1903 | PERR(" State: %d\n", notit->state); | |
1904 | } | |
1905 | goto end; | |
1906 | } | |
1907 | ||
1908 | switch (notit->state) { | |
1909 | case STATE_EMIT_NOTIF_NEW_PACKET: | |
1910 | PDBG("Emitting new packet notification\n"); | |
1911 | notify_new_packet(notit, notification); | |
1912 | if (!*notification) { | |
1913 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
1914 | } | |
1915 | goto end; | |
1916 | case STATE_EMIT_NOTIF_EVENT: | |
1917 | PDBG("Emitting event notification\n"); | |
1918 | notify_event(notit, notification); | |
1919 | if (!*notification) { | |
1920 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
1921 | } | |
1922 | goto end; | |
1923 | case STATE_EMIT_NOTIF_END_OF_PACKET: | |
1924 | PDBG("Emitting end of packet notification\n"); | |
1925 | notify_end_of_packet(notit, notification); | |
1926 | if (!*notification) { | |
1927 | status = BT_CTF_NOTIF_ITER_STATUS_ERROR; | |
1928 | } | |
1929 | goto end; | |
1930 | default: | |
1931 | /* Non-emitting state: continue */ | |
1932 | break; | |
1933 | } | |
1934 | } | |
1935 | ||
1936 | end: | |
1937 | return status; | |
1938 | } |