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48c47564 PP |
1 | /* |
2 | * event-expr.c | |
3 | * | |
48c47564 PP |
4 | * Copyright (C) 2020 Philippe Proulx <pproulx@efficios.com> |
5 | * | |
6 | * SPDX-License-Identifier: LGPL-2.1-only | |
7 | * | |
8 | */ | |
9 | ||
10 | #define _LGPL_SOURCE | |
48c47564 PP |
11 | #include <stddef.h> |
12 | ||
1aa9c49c | 13 | #include <common/bytecode/bytecode.h> |
48c47564 PP |
14 | #include <common/error.h> |
15 | #include <common/macros.h> | |
6a751b95 | 16 | #include <common/mi-lttng.h> |
48c47564 | 17 | #include <lttng/event-expr-internal.h> |
1aa9c49c JR |
18 | #include <lttng/event-expr.h> |
19 | #include <stdio.h> | |
48c47564 PP |
20 | |
21 | enum lttng_event_expr_type lttng_event_expr_get_type( | |
22 | const struct lttng_event_expr *expr) | |
23 | { | |
24 | enum lttng_event_expr_type type; | |
25 | ||
26 | if (!expr) { | |
27 | type = LTTNG_EVENT_EXPR_TYPE_INVALID; | |
28 | goto end; | |
29 | } | |
30 | ||
31 | type = expr->type; | |
32 | ||
33 | end: | |
34 | return type; | |
35 | } | |
36 | ||
37 | static | |
38 | struct lttng_event_expr *create_empty_expr(enum lttng_event_expr_type type, | |
39 | size_t size) | |
40 | { | |
41 | struct lttng_event_expr *expr; | |
42 | ||
43 | expr = zmalloc(size); | |
44 | if (!expr) { | |
45 | goto end; | |
46 | } | |
47 | ||
48 | expr->type = type; | |
49 | ||
50 | end: | |
51 | return expr; | |
52 | } | |
53 | ||
54 | static | |
55 | struct lttng_event_expr_field *create_field_event_expr( | |
56 | enum lttng_event_expr_type type, | |
57 | const char *name) | |
58 | { | |
59 | struct lttng_event_expr_field *expr = | |
60 | container_of( | |
61 | create_empty_expr(type, sizeof(*expr)), | |
62 | struct lttng_event_expr_field, parent); | |
63 | ||
64 | if (!expr) { | |
65 | goto error; | |
66 | } | |
67 | ||
a0377dfe | 68 | LTTNG_ASSERT(name); |
48c47564 PP |
69 | expr->name = strdup(name); |
70 | if (!expr->name) { | |
71 | goto error; | |
72 | } | |
73 | ||
74 | goto end; | |
75 | ||
76 | error: | |
5b5ad96e FD |
77 | if (expr) { |
78 | lttng_event_expr_destroy(&expr->parent); | |
79 | } | |
80 | expr = NULL; | |
48c47564 PP |
81 | |
82 | end: | |
83 | return expr; | |
84 | } | |
85 | ||
86 | struct lttng_event_expr *lttng_event_expr_event_payload_field_create( | |
87 | const char *field_name) | |
88 | { | |
89 | struct lttng_event_expr *expr = NULL; | |
90 | ||
91 | if (!field_name) { | |
92 | goto end; | |
93 | } | |
94 | ||
95 | expr = &create_field_event_expr( | |
96 | LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD, | |
97 | field_name)->parent; | |
98 | ||
99 | end: | |
100 | return expr; | |
101 | } | |
102 | ||
103 | struct lttng_event_expr *lttng_event_expr_channel_context_field_create( | |
104 | const char *field_name) | |
105 | { | |
106 | struct lttng_event_expr *expr = NULL; | |
107 | ||
108 | if (!field_name) { | |
109 | goto end; | |
110 | } | |
111 | ||
112 | expr = &create_field_event_expr( | |
113 | LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD, | |
114 | field_name)->parent; | |
115 | ||
116 | end: | |
117 | return expr; | |
118 | } | |
119 | ||
120 | struct lttng_event_expr *lttng_event_expr_app_specific_context_field_create( | |
121 | const char *provider_name, const char *type_name) | |
122 | { | |
123 | struct lttng_event_expr_app_specific_context_field *expr = NULL; | |
5b5ad96e | 124 | struct lttng_event_expr *ret_parent_expr; |
48c47564 PP |
125 | |
126 | if (!type_name || !provider_name) { | |
127 | goto error; | |
128 | } | |
129 | ||
130 | expr = container_of(create_empty_expr( | |
131 | LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD, | |
132 | sizeof(*expr)), | |
133 | struct lttng_event_expr_app_specific_context_field, | |
134 | parent); | |
135 | if (!expr) { | |
136 | goto error; | |
137 | } | |
138 | ||
139 | expr->provider_name = strdup(provider_name); | |
140 | if (!expr->provider_name) { | |
141 | goto error; | |
142 | } | |
143 | ||
144 | expr->type_name = strdup(type_name); | |
145 | if (!expr->type_name) { | |
146 | goto error; | |
147 | } | |
148 | ||
5b5ad96e | 149 | ret_parent_expr = &expr->parent; |
48c47564 PP |
150 | goto end; |
151 | ||
152 | error: | |
5b5ad96e FD |
153 | if (expr) { |
154 | lttng_event_expr_destroy(&expr->parent); | |
155 | } | |
156 | ret_parent_expr = NULL; | |
48c47564 PP |
157 | |
158 | end: | |
5b5ad96e | 159 | return ret_parent_expr; |
48c47564 PP |
160 | } |
161 | ||
162 | struct lttng_event_expr *lttng_event_expr_array_field_element_create( | |
163 | struct lttng_event_expr *array_field_expr, | |
164 | unsigned int index) | |
165 | { | |
166 | struct lttng_event_expr_array_field_element *expr = NULL; | |
5b5ad96e | 167 | struct lttng_event_expr *ret_parent_expr; |
48c47564 PP |
168 | |
169 | /* The parent array field expression must be an l-value */ | |
170 | if (!array_field_expr || | |
171 | !lttng_event_expr_is_lvalue(array_field_expr)) { | |
172 | goto error; | |
173 | } | |
174 | ||
175 | expr = container_of(create_empty_expr( | |
176 | LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT, | |
177 | sizeof(*expr)), | |
178 | struct lttng_event_expr_array_field_element, | |
179 | parent); | |
180 | if (!expr) { | |
181 | goto error; | |
182 | } | |
183 | ||
184 | expr->array_field_expr = array_field_expr; | |
185 | expr->index = index; | |
5b5ad96e | 186 | ret_parent_expr = &expr->parent; |
48c47564 PP |
187 | goto end; |
188 | ||
189 | error: | |
5b5ad96e | 190 | ret_parent_expr = NULL; |
48c47564 PP |
191 | |
192 | end: | |
5b5ad96e | 193 | return ret_parent_expr; |
48c47564 PP |
194 | } |
195 | ||
196 | const char *lttng_event_expr_event_payload_field_get_name( | |
197 | const struct lttng_event_expr *expr) | |
198 | { | |
199 | const char *ret = NULL; | |
200 | ||
201 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD) { | |
202 | goto end; | |
203 | } | |
204 | ||
205 | ret = container_of(expr, | |
206 | const struct lttng_event_expr_field, parent)->name; | |
207 | ||
208 | end: | |
209 | return ret; | |
210 | } | |
211 | ||
212 | const char *lttng_event_expr_channel_context_field_get_name( | |
213 | const struct lttng_event_expr *expr) | |
214 | { | |
215 | const char *ret = NULL; | |
216 | ||
217 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD) { | |
218 | goto end; | |
219 | } | |
220 | ||
221 | ret = container_of(expr, | |
222 | const struct lttng_event_expr_field, parent)->name; | |
223 | ||
224 | end: | |
225 | return ret; | |
226 | } | |
227 | ||
228 | const char *lttng_event_expr_app_specific_context_field_get_provider_name( | |
229 | const struct lttng_event_expr *expr) | |
230 | { | |
231 | const char *ret = NULL; | |
232 | ||
233 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD) { | |
234 | goto end; | |
235 | } | |
236 | ||
237 | ret = container_of(expr, | |
238 | const struct lttng_event_expr_app_specific_context_field, | |
239 | parent)->provider_name; | |
240 | ||
241 | end: | |
242 | return ret; | |
243 | } | |
244 | ||
245 | const char *lttng_event_expr_app_specific_context_field_get_type_name( | |
246 | const struct lttng_event_expr *expr) | |
247 | { | |
248 | const char *ret = NULL; | |
249 | ||
250 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD) { | |
251 | goto end; | |
252 | } | |
253 | ||
254 | ret = container_of(expr, | |
255 | const struct lttng_event_expr_app_specific_context_field, | |
256 | parent)->type_name; | |
257 | ||
258 | end: | |
259 | return ret; | |
260 | } | |
261 | ||
262 | const struct lttng_event_expr * | |
263 | lttng_event_expr_array_field_element_get_parent_expr( | |
264 | const struct lttng_event_expr *expr) | |
265 | { | |
266 | const struct lttng_event_expr *ret = NULL; | |
267 | ||
268 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT) { | |
269 | goto end; | |
270 | } | |
271 | ||
272 | ret = container_of(expr, | |
273 | const struct lttng_event_expr_array_field_element, | |
274 | parent)->array_field_expr; | |
275 | ||
276 | end: | |
277 | return ret; | |
278 | } | |
279 | ||
280 | enum lttng_event_expr_status lttng_event_expr_array_field_element_get_index( | |
281 | const struct lttng_event_expr *expr, unsigned int *index) | |
282 | { | |
283 | enum lttng_event_expr_status ret = LTTNG_EVENT_EXPR_STATUS_OK; | |
284 | ||
285 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT || | |
286 | !index) { | |
287 | ret = LTTNG_EVENT_EXPR_STATUS_INVALID; | |
288 | goto end; | |
289 | } | |
290 | ||
291 | *index = container_of(expr, | |
292 | const struct lttng_event_expr_array_field_element, | |
293 | parent)->index; | |
294 | ||
295 | end: | |
296 | return ret; | |
297 | } | |
298 | ||
299 | bool lttng_event_expr_is_equal(const struct lttng_event_expr *expr_a, | |
300 | const struct lttng_event_expr *expr_b) | |
301 | { | |
302 | bool is_equal = true; | |
303 | ||
304 | if (!expr_a && !expr_b) { | |
305 | /* Both `NULL`: equal */ | |
306 | goto end; | |
307 | } | |
308 | ||
309 | if (!expr_a || !expr_b) { | |
310 | /* Only one `NULL`: not equal */ | |
311 | goto not_equal; | |
312 | } | |
313 | ||
314 | if (expr_a->type != expr_b->type) { | |
315 | /* Different types: not equal */ | |
316 | goto not_equal; | |
317 | } | |
318 | ||
319 | switch (expr_a->type) { | |
320 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
321 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
322 | { | |
323 | const struct lttng_event_expr_field *field_expr_a = | |
324 | container_of(expr_a, | |
325 | const struct lttng_event_expr_field, | |
326 | parent); | |
327 | const struct lttng_event_expr_field *field_expr_b = | |
328 | container_of(expr_b, | |
329 | const struct lttng_event_expr_field, | |
330 | parent); | |
331 | ||
332 | if (strcmp(field_expr_a->name, field_expr_b->name) != 0) { | |
333 | goto not_equal; | |
334 | } | |
335 | ||
336 | break; | |
337 | } | |
338 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
339 | { | |
340 | const struct lttng_event_expr_app_specific_context_field *field_expr_a = | |
341 | container_of(expr_a, | |
342 | const struct lttng_event_expr_app_specific_context_field, | |
343 | parent); | |
344 | const struct lttng_event_expr_app_specific_context_field *field_expr_b = | |
345 | container_of(expr_b, | |
346 | const struct lttng_event_expr_app_specific_context_field, | |
347 | parent); | |
348 | ||
349 | if (strcmp(field_expr_a->provider_name, | |
350 | field_expr_b->provider_name) != 0) { | |
351 | goto not_equal; | |
352 | } | |
353 | ||
354 | if (strcmp(field_expr_a->type_name, | |
355 | field_expr_b->type_name) != 0) { | |
356 | goto not_equal; | |
357 | } | |
358 | ||
359 | break; | |
360 | } | |
361 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
362 | { | |
363 | const struct lttng_event_expr_array_field_element *elem_expr_a = | |
364 | container_of(expr_a, | |
365 | const struct lttng_event_expr_array_field_element, | |
366 | parent); | |
367 | const struct lttng_event_expr_array_field_element *elem_expr_b = | |
368 | container_of(expr_b, | |
369 | const struct lttng_event_expr_array_field_element, | |
370 | parent); | |
371 | ||
372 | if (!lttng_event_expr_is_equal(elem_expr_a->array_field_expr, | |
373 | elem_expr_b->array_field_expr)) { | |
374 | goto not_equal; | |
375 | } | |
376 | ||
377 | if (elem_expr_a->index != elem_expr_b->index) { | |
378 | goto not_equal; | |
379 | } | |
380 | ||
381 | break; | |
382 | } | |
383 | default: | |
384 | break; | |
385 | } | |
386 | ||
387 | goto end; | |
388 | ||
389 | not_equal: | |
390 | is_equal = false; | |
391 | ||
392 | end: | |
393 | return is_equal; | |
394 | } | |
395 | ||
396 | void lttng_event_expr_destroy(struct lttng_event_expr *expr) | |
397 | { | |
398 | if (!expr) { | |
399 | goto end; | |
400 | } | |
401 | ||
402 | switch (expr->type) { | |
403 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
404 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
405 | { | |
406 | struct lttng_event_expr_field *field_expr = | |
407 | container_of(expr, | |
408 | struct lttng_event_expr_field, parent); | |
409 | ||
410 | free(field_expr->name); | |
411 | break; | |
412 | } | |
413 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
414 | { | |
415 | struct lttng_event_expr_app_specific_context_field *field_expr = | |
416 | container_of(expr, | |
417 | struct lttng_event_expr_app_specific_context_field, | |
418 | parent); | |
419 | ||
420 | free(field_expr->provider_name); | |
421 | free(field_expr->type_name); | |
422 | break; | |
423 | } | |
424 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
425 | { | |
426 | struct lttng_event_expr_array_field_element *elem_expr = | |
427 | container_of(expr, | |
428 | struct lttng_event_expr_array_field_element, | |
429 | parent); | |
430 | ||
431 | lttng_event_expr_destroy(elem_expr->array_field_expr); | |
432 | break; | |
433 | } | |
434 | default: | |
435 | break; | |
436 | } | |
437 | ||
438 | free(expr); | |
439 | ||
440 | end: | |
441 | return; | |
442 | } | |
1aa9c49c JR |
443 | |
444 | static int event_expr_to_bytecode_recursive(const struct lttng_event_expr *expr, | |
445 | struct lttng_bytecode_alloc **bytecode, | |
446 | struct lttng_bytecode_alloc **bytecode_reloc) | |
447 | { | |
448 | int status; | |
449 | enum lttng_event_expr_status event_expr_status; | |
450 | ||
451 | switch (lttng_event_expr_get_type(expr)) { | |
452 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
453 | { | |
454 | const char *name; | |
455 | ||
456 | status = bytecode_push_get_payload_root(bytecode); | |
457 | if (status) { | |
458 | ERR("Failed to get payload root from bytecode"); | |
459 | goto end; | |
460 | } | |
461 | ||
462 | name = lttng_event_expr_event_payload_field_get_name(expr); | |
463 | if (!name) { | |
464 | ERR("Failed to get payload field name from event expression"); | |
465 | status = -1; | |
466 | goto end; | |
467 | } | |
468 | ||
469 | status = bytecode_push_get_symbol( | |
470 | bytecode, bytecode_reloc, name); | |
471 | if (status) { | |
472 | ERR("Failed to push 'get symbol %s' in bytecode", name); | |
473 | goto end; | |
474 | } | |
475 | ||
476 | break; | |
477 | } | |
478 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
479 | { | |
480 | const char *name; | |
481 | ||
482 | status = bytecode_push_get_context_root(bytecode); | |
483 | if (status) { | |
484 | ERR("Failed to get context root from bytecode"); | |
485 | goto end; | |
486 | } | |
487 | ||
488 | name = lttng_event_expr_channel_context_field_get_name(expr); | |
489 | if (!name) { | |
490 | ERR("Failed to get channel context field name from event expression"); | |
491 | status = -1; | |
492 | goto end; | |
493 | } | |
494 | ||
495 | status = bytecode_push_get_symbol( | |
496 | bytecode, bytecode_reloc, name); | |
497 | if (status) { | |
498 | ERR("Failed to push 'get symbol %s' in bytecode", name); | |
499 | goto end; | |
500 | } | |
501 | ||
502 | break; | |
503 | } | |
504 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
505 | { | |
506 | int ret; | |
507 | char *name = NULL; | |
508 | const char *provider_name, *type_name; | |
509 | ||
510 | status = bytecode_push_get_app_context_root(bytecode); | |
511 | if (status) { | |
512 | ERR("Failed to get application context root from bytecode"); | |
513 | goto end; | |
514 | } | |
515 | ||
516 | provider_name = lttng_event_expr_app_specific_context_field_get_provider_name( | |
517 | expr); | |
518 | if (!provider_name) { | |
519 | ERR("Failed to get application context provider name from event expression"); | |
520 | status = -1; | |
521 | goto end; | |
522 | } | |
523 | ||
524 | type_name = lttng_event_expr_app_specific_context_field_get_type_name( | |
525 | expr); | |
526 | if (!type_name) { | |
527 | ERR("Failed to get application context type name from event expression"); | |
528 | status = -1; | |
529 | goto end; | |
530 | } | |
531 | ||
532 | /* | |
533 | * Reconstitute the app context field name from its two parts. | |
534 | */ | |
535 | ret = asprintf(&name, "%s:%s", provider_name, type_name); | |
536 | if (ret < 0) { | |
537 | PERROR("Failed to format application specific context: provider_name = '%s', type_name = '%s'", | |
538 | provider_name, type_name); | |
539 | status = -1; | |
540 | goto end; | |
541 | } | |
542 | ||
543 | status = bytecode_push_get_symbol( | |
544 | bytecode, bytecode_reloc, name); | |
545 | free(name); | |
546 | if (status) { | |
547 | ERR("Failed to push 'get symbol %s:%s' in bytecode", | |
548 | provider_name, type_name); | |
549 | goto end; | |
550 | } | |
551 | ||
552 | break; | |
553 | } | |
554 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
555 | { | |
556 | unsigned int index; | |
557 | const struct lttng_event_expr *parent; | |
558 | ||
559 | parent = lttng_event_expr_array_field_element_get_parent_expr( | |
560 | expr); | |
561 | if (!parent) { | |
562 | ERR("Failed to get parent expression from array event expression"); | |
563 | status = -1; | |
564 | goto end; | |
565 | } | |
566 | ||
567 | status = event_expr_to_bytecode_recursive( | |
568 | parent, bytecode, bytecode_reloc); | |
569 | if (status) { | |
570 | goto end; | |
571 | } | |
572 | ||
573 | event_expr_status = | |
574 | lttng_event_expr_array_field_element_get_index( | |
575 | expr, &index); | |
576 | if (event_expr_status != LTTNG_EVENT_EXPR_STATUS_OK) { | |
577 | ERR("Failed to get array field element index from event expression"); | |
578 | status = -1; | |
579 | goto end; | |
580 | } | |
581 | ||
582 | status = bytecode_push_get_index_u64(bytecode, index); | |
583 | if (status) { | |
584 | ERR("Failed to push 'get index %u' in bytecode", index); | |
585 | goto end; | |
586 | } | |
587 | ||
588 | break; | |
589 | } | |
590 | default: | |
591 | abort(); | |
592 | } | |
593 | ||
594 | status = 0; | |
595 | end: | |
596 | return status; | |
597 | } | |
598 | ||
599 | LTTNG_HIDDEN | |
600 | int lttng_event_expr_to_bytecode(const struct lttng_event_expr *expr, | |
601 | struct lttng_bytecode **bytecode_out) | |
602 | { | |
603 | int status; | |
604 | struct return_op ret_insn; | |
605 | struct lttng_bytecode_alloc *bytecode = NULL; | |
606 | struct lttng_bytecode_alloc *bytecode_reloc = NULL; | |
607 | ||
608 | status = bytecode_init(&bytecode); | |
609 | if (status) { | |
610 | ERR("Failed to initialize bytecode"); | |
611 | goto end; | |
612 | } | |
613 | ||
614 | status = bytecode_init(&bytecode_reloc); | |
615 | if (status) { | |
616 | ERR("Failed to initialize relocation bytecode"); | |
617 | goto end; | |
618 | } | |
619 | ||
620 | status = event_expr_to_bytecode_recursive( | |
621 | expr, &bytecode, &bytecode_reloc); | |
622 | if (status) { | |
623 | /* Errors already logged. */ | |
624 | goto end; | |
625 | } | |
626 | ||
627 | ret_insn.op = BYTECODE_OP_RETURN; | |
628 | bytecode_push(&bytecode, &ret_insn, 1, sizeof(ret_insn)); | |
629 | ||
630 | /* Append symbol table to bytecode. */ | |
631 | bytecode->b.reloc_table_offset = bytecode_get_len(&bytecode->b); | |
632 | status = bytecode_push(&bytecode, bytecode_reloc->b.data, 1, | |
633 | bytecode_get_len(&bytecode_reloc->b)); | |
634 | if (status) { | |
635 | ERR("Failed to push symbol table to bytecode"); | |
636 | goto end; | |
637 | } | |
638 | ||
639 | /* Copy the `lttng_bytecode` out of the `lttng_bytecode_alloc`. */ | |
640 | *bytecode_out = lttng_bytecode_copy(&bytecode->b); | |
641 | if (!*bytecode_out) { | |
642 | status = -1; | |
643 | goto end; | |
644 | } | |
645 | ||
646 | end: | |
647 | if (bytecode) { | |
648 | free(bytecode); | |
649 | } | |
650 | ||
651 | if (bytecode_reloc) { | |
652 | free(bytecode_reloc); | |
653 | } | |
654 | ||
655 | return status; | |
656 | } | |
6a751b95 JR |
657 | |
658 | static | |
659 | enum lttng_error_code lttng_event_expr_event_payload_field_mi_serialize( | |
660 | const struct lttng_event_expr *expression, | |
661 | struct mi_writer *writer) | |
662 | { | |
663 | int ret; | |
664 | enum lttng_error_code ret_code; | |
665 | const char *name = NULL; | |
666 | ||
a0377dfe FD |
667 | LTTNG_ASSERT(expression); |
668 | LTTNG_ASSERT(writer); | |
669 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD); | |
6a751b95 JR |
670 | |
671 | name = lttng_event_expr_event_payload_field_get_name(expression); | |
a0377dfe | 672 | LTTNG_ASSERT(name); |
6a751b95 JR |
673 | |
674 | /* Open event expr payload field element. */ | |
675 | ret = mi_lttng_writer_open_element( | |
676 | writer, mi_lttng_element_event_expr_payload_field); | |
677 | if (ret) { | |
678 | goto mi_error; | |
679 | } | |
680 | ||
681 | /* Name. */ | |
682 | ret = mi_lttng_writer_write_element_string( | |
683 | writer, config_element_name, name); | |
684 | if (ret) { | |
685 | goto mi_error; | |
686 | } | |
687 | ||
688 | /* Close event expr payload field element. */ | |
689 | ret = mi_lttng_writer_close_element(writer); | |
690 | if (ret) { | |
691 | goto mi_error; | |
692 | } | |
693 | ||
694 | ret_code = LTTNG_OK; | |
695 | goto end; | |
696 | ||
697 | mi_error: | |
698 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
699 | end: | |
700 | return ret_code; | |
701 | } | |
702 | ||
703 | static | |
704 | enum lttng_error_code lttng_event_expr_channel_context_field_mi_serialize( | |
705 | const struct lttng_event_expr *expression, | |
706 | struct mi_writer *writer) | |
707 | { | |
708 | int ret; | |
709 | enum lttng_error_code ret_code; | |
710 | const char *name = NULL; | |
711 | ||
a0377dfe FD |
712 | LTTNG_ASSERT(expression); |
713 | LTTNG_ASSERT(writer); | |
714 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD); | |
6a751b95 JR |
715 | |
716 | name = lttng_event_expr_channel_context_field_get_name(expression); | |
a0377dfe | 717 | LTTNG_ASSERT(name); |
6a751b95 JR |
718 | |
719 | /* Open event expr channel context field element. */ | |
720 | ret = mi_lttng_writer_open_element(writer, | |
721 | mi_lttng_element_event_expr_channel_context_field); | |
722 | if (ret) { | |
723 | goto mi_error; | |
724 | } | |
725 | ||
726 | /* Name. */ | |
727 | ret = mi_lttng_writer_write_element_string( | |
728 | writer, config_element_name, name); | |
729 | if (ret) { | |
730 | goto mi_error; | |
731 | } | |
732 | ||
733 | /* Close event expr channel context field element. */ | |
734 | ret = mi_lttng_writer_close_element(writer); | |
735 | if (ret) { | |
736 | goto mi_error; | |
737 | } | |
738 | ||
739 | ret_code = LTTNG_OK; | |
740 | goto end; | |
741 | ||
742 | mi_error: | |
743 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
744 | end: | |
745 | return ret_code; | |
746 | } | |
747 | ||
748 | static | |
749 | enum lttng_error_code lttng_event_expr_app_specific_context_field_mi_serialize( | |
750 | const struct lttng_event_expr *expression, | |
751 | struct mi_writer *writer) | |
752 | { | |
753 | int ret; | |
754 | enum lttng_error_code ret_code; | |
755 | const char *provider_name = NULL; | |
756 | const char *type_name = NULL; | |
757 | ||
a0377dfe FD |
758 | LTTNG_ASSERT(expression); |
759 | LTTNG_ASSERT(writer); | |
760 | LTTNG_ASSERT(expression->type == | |
6a751b95 JR |
761 | LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD); |
762 | ||
763 | provider_name = lttng_event_expr_app_specific_context_field_get_provider_name( | |
764 | expression); | |
a0377dfe | 765 | LTTNG_ASSERT(provider_name); |
6a751b95 JR |
766 | |
767 | type_name = lttng_event_expr_app_specific_context_field_get_type_name( | |
768 | expression); | |
a0377dfe | 769 | LTTNG_ASSERT(provider_name); |
6a751b95 JR |
770 | |
771 | /* Open event expr app specific context field element. */ | |
772 | ret = mi_lttng_writer_open_element(writer, | |
773 | mi_lttng_element_event_expr_app_specific_context_field); | |
774 | if (ret) { | |
775 | goto mi_error; | |
776 | } | |
777 | ||
778 | /* Provider name. */ | |
779 | ret = mi_lttng_writer_write_element_string(writer, | |
780 | mi_lttng_element_event_expr_provider_name, | |
781 | provider_name); | |
782 | if (ret) { | |
783 | goto mi_error; | |
784 | } | |
785 | ||
786 | /* Type name. */ | |
787 | ret = mi_lttng_writer_write_element_string(writer, | |
788 | mi_lttng_element_event_expr_type_name, type_name); | |
789 | if (ret) { | |
790 | goto mi_error; | |
791 | } | |
792 | ||
793 | /* Close event expr app specific context field element. */ | |
794 | ret = mi_lttng_writer_close_element(writer); | |
795 | if (ret) { | |
796 | goto mi_error; | |
797 | } | |
798 | ||
799 | ret_code = LTTNG_OK; | |
800 | goto end; | |
801 | ||
802 | mi_error: | |
803 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
804 | end: | |
805 | return ret_code; | |
806 | } | |
807 | ||
808 | static | |
809 | enum lttng_error_code lttng_event_expr_array_field_element_mi_serialize( | |
810 | const struct lttng_event_expr *expression, | |
811 | struct mi_writer *writer) | |
812 | { | |
813 | int ret; | |
814 | enum lttng_error_code ret_code; | |
815 | enum lttng_event_expr_status status; | |
816 | const struct lttng_event_expr *parent_expr = NULL; | |
817 | unsigned int index; | |
818 | ||
a0377dfe FD |
819 | LTTNG_ASSERT(expression); |
820 | LTTNG_ASSERT(writer); | |
821 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT); | |
6a751b95 JR |
822 | |
823 | status = lttng_event_expr_array_field_element_get_index( | |
824 | expression, &index); | |
a0377dfe | 825 | LTTNG_ASSERT(status == LTTNG_EVENT_EXPR_STATUS_OK); |
6a751b95 JR |
826 | |
827 | parent_expr = lttng_event_expr_array_field_element_get_parent_expr( | |
828 | expression); | |
a0377dfe | 829 | LTTNG_ASSERT(parent_expr != NULL); |
6a751b95 JR |
830 | |
831 | /* Open event expr array field element. */ | |
832 | ret = mi_lttng_writer_open_element(writer, | |
833 | mi_lttng_element_event_expr_array_field_element); | |
834 | if (ret) { | |
835 | goto mi_error; | |
836 | } | |
837 | ||
838 | /* Index. */ | |
839 | ret = mi_lttng_writer_write_element_unsigned_int( | |
840 | writer, mi_lttng_element_event_expr_index, index); | |
841 | if (ret) { | |
842 | goto mi_error; | |
843 | } | |
844 | ||
845 | /* Parent expression. */ | |
846 | ret_code = lttng_event_expr_mi_serialize(parent_expr, writer); | |
847 | if (ret_code != LTTNG_OK) { | |
848 | goto end; | |
849 | } | |
850 | ||
851 | /* Close event expr array field element. */ | |
852 | ret = mi_lttng_writer_close_element(writer); | |
853 | if (ret) { | |
854 | goto mi_error; | |
855 | } | |
856 | ||
857 | ret_code = LTTNG_OK; | |
858 | goto end; | |
859 | ||
860 | mi_error: | |
861 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
862 | end: | |
863 | return ret_code; | |
864 | } | |
865 | ||
866 | LTTNG_HIDDEN | |
867 | enum lttng_error_code lttng_event_expr_mi_serialize( | |
868 | const struct lttng_event_expr *expression, | |
869 | struct mi_writer *writer) | |
870 | { | |
871 | int ret; | |
872 | enum lttng_error_code ret_code; | |
873 | ||
a0377dfe FD |
874 | LTTNG_ASSERT(expression); |
875 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
876 | |
877 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_expr); | |
878 | if (ret) { | |
879 | goto mi_error; | |
880 | } | |
881 | ||
882 | switch (expression->type) { | |
883 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
884 | ret_code = lttng_event_expr_event_payload_field_mi_serialize( | |
885 | expression, writer); | |
886 | break; | |
887 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
888 | ret_code = lttng_event_expr_channel_context_field_mi_serialize( | |
889 | expression, writer); | |
890 | break; | |
891 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
892 | ret_code = lttng_event_expr_app_specific_context_field_mi_serialize( | |
893 | expression, writer); | |
894 | break; | |
895 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
896 | ret_code = lttng_event_expr_array_field_element_mi_serialize( | |
897 | expression, writer); | |
898 | break; | |
899 | default: | |
900 | abort(); | |
901 | } | |
902 | ||
903 | if (ret_code != LTTNG_OK) { | |
904 | goto end; | |
905 | } | |
906 | ||
907 | ret = mi_lttng_writer_close_element(writer); | |
908 | if (ret) { | |
909 | goto mi_error; | |
910 | } | |
911 | ||
912 | ret_code = LTTNG_OK; | |
913 | goto end; | |
914 | ||
915 | mi_error: | |
916 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
917 | ||
918 | end: | |
919 | return ret_code; | |
920 | } |