Fix: check return value of get_char_array
[babeltrace.git] / formats / ctf / events.c
1 /*
2 * ctf/events.c
3 *
4 * Babeltrace Library
5 *
6 * Copyright 2011-2012 EfficiOS Inc. and Linux Foundation
7 *
8 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
9 * Julien Desfossez <julien.desfossez@efficios.com>
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining a copy
12 * of this software and associated documentation files (the "Software"), to deal
13 * in the Software without restriction, including without limitation the rights
14 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
15 * copies of the Software, and to permit persons to whom the Software is
16 * furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be included in
19 * all copies or substantial portions of the Software.
20 */
21
22 #include <babeltrace/babeltrace.h>
23 #include <babeltrace/format.h>
24 #include <babeltrace/ctf/events.h>
25 #include <babeltrace/ctf-ir/metadata.h>
26 #include <babeltrace/prio_heap.h>
27 #include <babeltrace/iterator-internal.h>
28 #include <babeltrace/ctf/events-internal.h>
29 #include <babeltrace/ctf/metadata.h>
30 #include <glib.h>
31
32 #include "events-private.h"
33
34 /*
35 * thread local storage to store the last error that occured
36 * while reading a field, this variable must be accessed by
37 * bt_ctf_field_get_error only
38 */
39 __thread int bt_ctf_last_field_error = 0;
40
41 const struct definition *bt_ctf_get_top_level_scope(const struct bt_ctf_event *ctf_event,
42 enum bt_ctf_scope scope)
43 {
44 struct definition *tmp = NULL;
45 struct ctf_event_definition *event;
46
47 if (!ctf_event)
48 return NULL;
49
50 event = ctf_event->parent;
51 switch (scope) {
52 case BT_TRACE_PACKET_HEADER:
53 if (!event->stream)
54 goto error;
55 if (event->stream->trace_packet_header)
56 tmp = &event->stream->trace_packet_header->p;
57 break;
58 case BT_STREAM_PACKET_CONTEXT:
59 if (!event->stream)
60 goto error;
61 if (event->stream->stream_packet_context)
62 tmp = &event->stream->stream_packet_context->p;
63 break;
64 case BT_STREAM_EVENT_HEADER:
65 if (!event->stream)
66 goto error;
67 if (event->stream->stream_event_header)
68 tmp = &event->stream->stream_event_header->p;
69 break;
70 case BT_STREAM_EVENT_CONTEXT:
71 if (!event->stream)
72 goto error;
73 if (event->stream->stream_event_context)
74 tmp = &event->stream->stream_event_context->p;
75 break;
76 case BT_EVENT_CONTEXT:
77 if (event->event_context)
78 tmp = &event->event_context->p;
79 break;
80 case BT_EVENT_FIELDS:
81 if (event->event_fields)
82 tmp = &event->event_fields->p;
83 break;
84 }
85 return tmp;
86
87 error:
88 return NULL;
89 }
90
91 const struct definition *bt_ctf_get_field(const struct bt_ctf_event *ctf_event,
92 const struct definition *scope,
93 const char *field)
94 {
95 struct definition *def;
96 char *field_underscore;
97
98 if (!ctf_event || !scope || !field)
99 return NULL;
100
101 def = lookup_definition(scope, field);
102 /*
103 * optionally a field can have an underscore prefix, try
104 * to lookup the field with this prefix if it failed
105 */
106 if (!def) {
107 field_underscore = g_new(char, strlen(field) + 2);
108 field_underscore[0] = '_';
109 strcpy(&field_underscore[1], field);
110 def = lookup_definition(scope, field_underscore);
111 g_free(field_underscore);
112 }
113 if (bt_ctf_field_type(def) == CTF_TYPE_VARIANT) {
114 struct definition_variant *variant_definition;
115 variant_definition = container_of(def,
116 struct definition_variant, p);
117 return variant_definition->current_field;
118 }
119 return def;
120 }
121
122 const struct definition *bt_ctf_get_index(const struct bt_ctf_event *ctf_event,
123 const struct definition *field,
124 unsigned int index)
125 {
126 struct definition *ret = NULL;
127
128 if (!ctf_event || !field)
129 return NULL;
130
131 if (bt_ctf_field_type(field) == CTF_TYPE_ARRAY) {
132 struct definition_array *array_definition;
133 array_definition = container_of(field,
134 struct definition_array, p);
135 ret = array_index(array_definition, index);
136 } else if (bt_ctf_field_type(field) == CTF_TYPE_SEQUENCE) {
137 struct definition_sequence *sequence_definition;
138 sequence_definition = container_of(field,
139 struct definition_sequence, p);
140 ret = sequence_index(sequence_definition, index);
141 }
142 return ret;
143 }
144
145 const char *bt_ctf_event_name(const struct bt_ctf_event *ctf_event)
146 {
147 struct ctf_event_declaration *event_class;
148 struct ctf_stream_declaration *stream_class;
149 struct ctf_event_definition *event;
150
151 if (!ctf_event)
152 return NULL;
153
154 event = ctf_event->parent;
155 stream_class = event->stream->stream_class;
156 event_class = g_ptr_array_index(stream_class->events_by_id,
157 event->stream->event_id);
158 return g_quark_to_string(event_class->name);
159 }
160
161 const char *bt_ctf_field_name(const struct definition *def)
162 {
163 if (!def)
164 return NULL;
165
166 return rem_(g_quark_to_string(def->name));
167 }
168
169 enum ctf_type_id bt_ctf_field_type(const struct definition *def)
170 {
171 if (!def)
172 return CTF_TYPE_UNKNOWN;
173
174 return def->declaration->id;
175 }
176
177 int bt_ctf_get_field_list(const struct bt_ctf_event *ctf_event,
178 const struct definition *scope,
179 struct definition const * const **list,
180 unsigned int *count)
181 {
182 if (!ctf_event || !scope || !list || !count)
183 return -EINVAL;
184
185 switch (bt_ctf_field_type(scope)) {
186 case CTF_TYPE_INTEGER:
187 case CTF_TYPE_FLOAT:
188 case CTF_TYPE_STRING:
189 case CTF_TYPE_ENUM:
190 goto error;
191 case CTF_TYPE_STRUCT:
192 {
193 const struct definition_struct *def_struct;
194
195 def_struct = container_of(scope, const struct definition_struct, p);
196 if (!def_struct)
197 goto error;
198 if (def_struct->fields->pdata) {
199 *list = (struct definition const* const*) def_struct->fields->pdata;
200 *count = def_struct->fields->len;
201 goto end;
202 } else {
203 goto error;
204 }
205 break;
206 }
207 case CTF_TYPE_UNTAGGED_VARIANT:
208 goto error;
209 case CTF_TYPE_VARIANT:
210 {
211 const struct definition_variant *def_variant;
212
213 def_variant = container_of(scope, const struct definition_variant, p);
214 if (!def_variant)
215 goto error;
216 if (def_variant->fields->pdata) {
217 *list = (struct definition const* const*) def_variant->fields->pdata;
218 *count = def_variant->fields->len;
219 goto end;
220 } else {
221 goto error;
222 }
223 break;
224 }
225 case CTF_TYPE_ARRAY:
226 {
227 const struct definition_array *def_array;
228
229 def_array = container_of(scope, const struct definition_array, p);
230 if (!def_array)
231 goto error;
232 if (def_array->elems->pdata) {
233 *list = (struct definition const* const*) def_array->elems->pdata;
234 *count = def_array->elems->len;
235 goto end;
236 } else {
237 goto error;
238 }
239 break;
240 }
241 case CTF_TYPE_SEQUENCE:
242 {
243 const struct definition_sequence *def_sequence;
244
245 def_sequence = container_of(scope, const struct definition_sequence, p);
246 if (!def_sequence)
247 goto error;
248 if (def_sequence->elems->pdata) {
249 *list = (struct definition const* const*) def_sequence->elems->pdata;
250 *count = def_sequence->elems->len;
251 goto end;
252 } else {
253 goto error;
254 }
255 break;
256 }
257 default:
258 break;
259 }
260
261 end:
262 return 0;
263
264 error:
265 *list = NULL;
266 *count = 0;
267 return -1;
268 }
269
270 struct bt_context *bt_ctf_event_get_context(const struct bt_ctf_event *ctf_event)
271 {
272 struct bt_context *ret = NULL;
273 struct ctf_file_stream *cfs;
274 struct ctf_trace *trace;
275 struct ctf_event_definition *event;
276
277 if (!ctf_event)
278 return NULL;
279
280 event = ctf_event->parent;
281 cfs = container_of(event->stream, struct ctf_file_stream,
282 parent);
283 trace = cfs->parent.stream_class->trace;
284 if (trace->ctx)
285 ret = trace->ctx;
286
287 return ret;
288 }
289
290 int bt_ctf_event_get_handle_id(const struct bt_ctf_event *ctf_event)
291 {
292 int ret = -1;
293 struct ctf_file_stream *cfs;
294 struct ctf_trace *trace;
295 struct ctf_event_definition *event;
296
297 if (!ctf_event)
298 return -EINVAL;
299
300 event = ctf_event->parent;
301 cfs = container_of(event->stream, struct ctf_file_stream,
302 parent);
303 trace = cfs->parent.stream_class->trace;
304 if (trace->handle)
305 ret = trace->handle->id;
306
307 return ret;
308 }
309
310 uint64_t bt_ctf_get_timestamp(const struct bt_ctf_event *ctf_event)
311 {
312 struct ctf_event_definition *event;
313
314 if (!ctf_event)
315 return -1ULL;
316
317 event = ctf_event->parent;
318 if (event && event->stream->has_timestamp)
319 return event->stream->real_timestamp;
320 else
321 return -1ULL;
322 }
323
324 uint64_t bt_ctf_get_cycles(const struct bt_ctf_event *ctf_event)
325 {
326 struct ctf_event_definition *event;
327
328 if (!ctf_event)
329 return -1ULL;
330
331 event = ctf_event->parent;
332 if (event && event->stream->has_timestamp)
333 return event->stream->cycles_timestamp;
334 else
335 return -1ULL;
336 }
337
338 static void bt_ctf_field_set_error(int error)
339 {
340 bt_ctf_last_field_error = error;
341 }
342
343 int bt_ctf_field_get_error(void)
344 {
345 int ret;
346 ret = bt_ctf_last_field_error;
347 bt_ctf_last_field_error = 0;
348
349 return ret;
350 }
351
352 int bt_ctf_get_int_signedness(const struct definition *field)
353 {
354 int ret;
355
356 if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER) {
357 ret = get_int_signedness(field);
358 } else {
359 ret = -EINVAL;
360 bt_ctf_field_set_error(-EINVAL);
361 }
362
363 return ret;
364 }
365
366 int bt_ctf_get_int_base(const struct definition *field)
367 {
368 int ret;
369
370 if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER) {
371 ret = get_int_base(field);
372 } else {
373 ret = -EINVAL;
374 bt_ctf_field_set_error(-EINVAL);
375 }
376
377 return ret;
378 }
379
380 int bt_ctf_get_int_byte_order(const struct definition *field)
381 {
382 int ret;
383
384 if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER) {
385 ret = get_int_byte_order(field);
386 } else {
387 ret = -EINVAL;
388 bt_ctf_field_set_error(-EINVAL);
389 }
390
391 return ret;
392 }
393
394 ssize_t bt_ctf_get_int_len(const struct definition *field)
395 {
396 ssize_t ret;
397
398 if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER) {
399 ret = (ssize_t) get_int_len(field);
400 } else {
401 ret = -EINVAL;
402 bt_ctf_field_set_error(-EINVAL);
403 }
404
405 return ret;
406 }
407
408 const struct definition *bt_ctf_get_enum_int(const struct definition *field)
409 {
410 struct definition_enum *def_enum;
411
412 if (!field || bt_ctf_field_type(field) != CTF_TYPE_ENUM) {
413 bt_ctf_field_set_error(-EINVAL);
414 return NULL;
415 }
416 def_enum = container_of(field, struct definition_enum, p);
417 return &def_enum->integer->p;
418 }
419
420 const char *bt_ctf_get_enum_str(const struct definition *field)
421 {
422 struct definition_enum *def_enum;
423 struct declaration_enum *decl_enum;
424 GArray *array;
425 const char *ret;
426
427 if (!field || bt_ctf_field_type(field) != CTF_TYPE_ENUM) {
428 bt_ctf_field_set_error(-EINVAL);
429 return NULL;
430 }
431 def_enum = container_of(field, struct definition_enum, p);
432 decl_enum = def_enum->declaration;
433 if (get_int_signedness(&def_enum->integer->p)) {
434 array = enum_int_to_quark_set(decl_enum,
435 get_signed_int(&def_enum->integer->p));
436 } else {
437 array = enum_uint_to_quark_set(decl_enum,
438 get_unsigned_int(&def_enum->integer->p));
439 }
440 if (!array) {
441 bt_ctf_field_set_error(-ENOENT);
442 return NULL;
443 }
444
445 if (array->len == 0) {
446 g_array_unref(array);
447 bt_ctf_field_set_error(-ENOENT);
448 return NULL;
449 }
450 /* Return first string. Arbitrary choice. */
451 ret = g_quark_to_string(g_array_index(array, GQuark, 0));
452 g_array_unref(array);
453 return ret;
454 }
455
456 enum ctf_string_encoding bt_ctf_get_encoding(const struct definition *field)
457 {
458 enum ctf_string_encoding ret = 0;
459
460 if (!field)
461 goto error;
462
463 if (bt_ctf_field_type(field) == CTF_TYPE_INTEGER)
464 ret = get_int_encoding(field);
465 else if (bt_ctf_field_type(field) == CTF_TYPE_STRING)
466 ret = get_string_encoding(field);
467 else
468 goto error;
469 return ret;
470
471 error:
472 bt_ctf_field_set_error(-EINVAL);
473 return -1;
474 }
475
476 int bt_ctf_get_array_len(const struct definition *field)
477 {
478 int ret;
479
480 if (field && bt_ctf_field_type(field) == CTF_TYPE_ARRAY) {
481 ret = get_array_len(field);
482 } else {
483 ret = -1;
484 bt_ctf_field_set_error(-EINVAL);
485 }
486
487 return ret;
488 }
489
490 uint64_t bt_ctf_get_uint64(const struct definition *field)
491 {
492 uint64_t ret = 0;
493
494 if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER)
495 ret = get_unsigned_int(field);
496 else
497 bt_ctf_field_set_error(-EINVAL);
498
499 return ret;
500 }
501
502 int64_t bt_ctf_get_int64(const struct definition *field)
503 {
504 int64_t ret = 0;
505
506 if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER)
507 ret = get_signed_int(field);
508 else
509 bt_ctf_field_set_error(-EINVAL);
510
511 return ret;
512
513 }
514
515 char *bt_ctf_get_char_array(const struct definition *field)
516 {
517 char *ret = NULL;
518 GString *char_array;
519
520 if (field && bt_ctf_field_type(field) == CTF_TYPE_ARRAY) {
521 char_array = get_char_array(field);
522 if (char_array) {
523 ret = char_array->str;
524 goto end;
525 }
526 }
527 bt_ctf_field_set_error(-EINVAL);
528
529 end:
530 return ret;
531 }
532
533 char *bt_ctf_get_string(const struct definition *field)
534 {
535 char *ret = NULL;
536
537 if (field && bt_ctf_field_type(field) == CTF_TYPE_STRING)
538 ret = get_string(field);
539 else
540 bt_ctf_field_set_error(-EINVAL);
541
542 return ret;
543 }
544
545 int bt_ctf_get_event_decl_list(int handle_id, struct bt_context *ctx,
546 struct bt_ctf_event_decl * const **list,
547 unsigned int *count)
548 {
549 struct bt_trace_handle *handle;
550 struct trace_descriptor *td;
551 struct ctf_trace *tin;
552
553 if (!ctx || !list || !count)
554 goto error;
555
556 handle = g_hash_table_lookup(ctx->trace_handles,
557 (gpointer) (unsigned long) handle_id);
558 if (!handle)
559 goto error;
560
561 td = handle->td;
562 tin = container_of(td, struct ctf_trace, parent);
563
564 *list = (struct bt_ctf_event_decl * const*) tin->event_declarations->pdata;
565 *count = tin->event_declarations->len;
566 return 0;
567
568 error:
569 return -1;
570 }
571
572 const char *bt_ctf_get_decl_event_name(const struct bt_ctf_event_decl *event)
573 {
574 if (!event)
575 return NULL;
576
577 return g_quark_to_string(event->parent.name);
578 }
579
580 int bt_ctf_get_decl_fields(struct bt_ctf_event_decl *event_decl,
581 enum bt_ctf_scope scope,
582 struct bt_ctf_field_decl const * const **list,
583 unsigned int *count)
584 {
585 int i;
586 GArray *fields = NULL;
587 gpointer *ret_list = NULL;
588 GPtrArray *fields_array = NULL;
589 int ret = 0;
590 *count = 0;
591
592 if (!event_decl || !list || !count)
593 return -EINVAL;
594
595 switch (scope) {
596 case BT_EVENT_CONTEXT:
597 if (event_decl->context_decl) {
598 ret_list = event_decl->context_decl->pdata;
599 *count = event_decl->context_decl->len;
600 goto end;
601 }
602 event_decl->context_decl = g_ptr_array_new();
603 if (!event_decl->parent.context_decl) {
604 ret = -1;
605 goto end;
606 }
607 fields = event_decl->parent.context_decl->fields;
608 fields_array = event_decl->context_decl;
609 break;
610 case BT_EVENT_FIELDS:
611 if (event_decl->fields_decl) {
612 ret_list = event_decl->fields_decl->pdata;
613 *count = event_decl->fields_decl->len;
614 goto end;
615 }
616 event_decl->fields_decl = g_ptr_array_new();
617 if (!event_decl->parent.fields_decl) {
618 ret = -1;
619 goto end;
620 }
621 fields = event_decl->parent.fields_decl->fields;
622 fields_array = event_decl->fields_decl;
623 break;
624 case BT_STREAM_PACKET_CONTEXT:
625 if (event_decl->packet_context_decl) {
626 ret_list = event_decl->packet_context_decl->pdata;
627 *count = event_decl->packet_context_decl->len;
628 goto end;
629 }
630 event_decl->packet_context_decl = g_ptr_array_new();
631 if (!event_decl->parent.stream->packet_context_decl) {
632 ret = -1;
633 goto end;
634 }
635 fields = event_decl->parent.stream->packet_context_decl->fields;
636 fields_array = event_decl->packet_context_decl;
637 break;
638 case BT_STREAM_EVENT_CONTEXT:
639 if (event_decl->event_context_decl) {
640 ret_list = event_decl->event_context_decl->pdata;
641 *count = event_decl->event_context_decl->len;
642 goto end;
643 }
644 event_decl->event_context_decl = g_ptr_array_new();
645 if (!event_decl->parent.stream->event_context_decl) {
646 ret = -1;
647 goto end;
648 }
649 fields = event_decl->parent.stream->event_context_decl->fields;
650 fields_array = event_decl->event_context_decl;
651 break;
652 case BT_STREAM_EVENT_HEADER:
653 if (event_decl->event_header_decl) {
654 ret_list = event_decl->event_header_decl->pdata;
655 *count = event_decl->event_header_decl->len;
656 goto end;
657 }
658 event_decl->event_header_decl = g_ptr_array_new();
659 if (!event_decl->parent.stream->event_header_decl) {
660 ret = -1;
661 goto end;
662 }
663 fields = event_decl->parent.stream->event_header_decl->fields;
664 fields_array = event_decl->event_header_decl;
665 break;
666 case BT_TRACE_PACKET_HEADER:
667 if (event_decl->packet_header_decl) {
668 ret_list = event_decl->packet_header_decl->pdata;
669 *count = event_decl->packet_header_decl->len;
670 goto end;
671 }
672 event_decl->packet_header_decl = g_ptr_array_new();
673 if (!event_decl->parent.stream->trace->packet_header_decl) {
674 ret = -1;
675 goto end;
676 }
677 fields = event_decl->parent.stream->trace->packet_header_decl->fields;
678 fields_array = event_decl->packet_header_decl;
679 break;
680 }
681
682 for (i = 0; i < fields->len; i++) {
683 g_ptr_array_add(fields_array,
684 &g_array_index(fields,
685 struct declaration_field, i));
686 }
687 ret_list = fields_array->pdata;
688 *count = fields->len;
689
690 end:
691 *list = (struct bt_ctf_field_decl const* const*) ret_list;
692
693 return ret;
694 }
695
696 const char *bt_ctf_get_decl_field_name(const struct bt_ctf_field_decl *field)
697 {
698 if (!field)
699 return NULL;
700
701 return rem_(g_quark_to_string(((struct declaration_field *) field)->name));
702 }
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