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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 | ||
a6bc4ca9 | 43 | expr = (lttng_event_expr *) zmalloc(size); |
48c47564 PP |
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 | ||
1aa9c49c JR |
599 | int lttng_event_expr_to_bytecode(const struct lttng_event_expr *expr, |
600 | struct lttng_bytecode **bytecode_out) | |
601 | { | |
602 | int status; | |
603 | struct return_op ret_insn; | |
604 | struct lttng_bytecode_alloc *bytecode = NULL; | |
605 | struct lttng_bytecode_alloc *bytecode_reloc = NULL; | |
606 | ||
607 | status = bytecode_init(&bytecode); | |
608 | if (status) { | |
609 | ERR("Failed to initialize bytecode"); | |
610 | goto end; | |
611 | } | |
612 | ||
613 | status = bytecode_init(&bytecode_reloc); | |
614 | if (status) { | |
615 | ERR("Failed to initialize relocation bytecode"); | |
616 | goto end; | |
617 | } | |
618 | ||
619 | status = event_expr_to_bytecode_recursive( | |
620 | expr, &bytecode, &bytecode_reloc); | |
621 | if (status) { | |
622 | /* Errors already logged. */ | |
623 | goto end; | |
624 | } | |
625 | ||
626 | ret_insn.op = BYTECODE_OP_RETURN; | |
627 | bytecode_push(&bytecode, &ret_insn, 1, sizeof(ret_insn)); | |
628 | ||
629 | /* Append symbol table to bytecode. */ | |
630 | bytecode->b.reloc_table_offset = bytecode_get_len(&bytecode->b); | |
631 | status = bytecode_push(&bytecode, bytecode_reloc->b.data, 1, | |
632 | bytecode_get_len(&bytecode_reloc->b)); | |
633 | if (status) { | |
634 | ERR("Failed to push symbol table to bytecode"); | |
635 | goto end; | |
636 | } | |
637 | ||
638 | /* Copy the `lttng_bytecode` out of the `lttng_bytecode_alloc`. */ | |
639 | *bytecode_out = lttng_bytecode_copy(&bytecode->b); | |
640 | if (!*bytecode_out) { | |
641 | status = -1; | |
642 | goto end; | |
643 | } | |
644 | ||
645 | end: | |
646 | if (bytecode) { | |
647 | free(bytecode); | |
648 | } | |
649 | ||
650 | if (bytecode_reloc) { | |
651 | free(bytecode_reloc); | |
652 | } | |
653 | ||
654 | return status; | |
655 | } | |
6a751b95 JR |
656 | |
657 | static | |
658 | enum lttng_error_code lttng_event_expr_event_payload_field_mi_serialize( | |
659 | const struct lttng_event_expr *expression, | |
660 | struct mi_writer *writer) | |
661 | { | |
662 | int ret; | |
663 | enum lttng_error_code ret_code; | |
664 | const char *name = NULL; | |
665 | ||
a0377dfe FD |
666 | LTTNG_ASSERT(expression); |
667 | LTTNG_ASSERT(writer); | |
668 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD); | |
6a751b95 JR |
669 | |
670 | name = lttng_event_expr_event_payload_field_get_name(expression); | |
a0377dfe | 671 | LTTNG_ASSERT(name); |
6a751b95 JR |
672 | |
673 | /* Open event expr payload field element. */ | |
674 | ret = mi_lttng_writer_open_element( | |
675 | writer, mi_lttng_element_event_expr_payload_field); | |
676 | if (ret) { | |
677 | goto mi_error; | |
678 | } | |
679 | ||
680 | /* Name. */ | |
681 | ret = mi_lttng_writer_write_element_string( | |
682 | writer, config_element_name, name); | |
683 | if (ret) { | |
684 | goto mi_error; | |
685 | } | |
686 | ||
687 | /* Close event expr payload field element. */ | |
688 | ret = mi_lttng_writer_close_element(writer); | |
689 | if (ret) { | |
690 | goto mi_error; | |
691 | } | |
692 | ||
693 | ret_code = LTTNG_OK; | |
694 | goto end; | |
695 | ||
696 | mi_error: | |
697 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
698 | end: | |
699 | return ret_code; | |
700 | } | |
701 | ||
702 | static | |
703 | enum lttng_error_code lttng_event_expr_channel_context_field_mi_serialize( | |
704 | const struct lttng_event_expr *expression, | |
705 | struct mi_writer *writer) | |
706 | { | |
707 | int ret; | |
708 | enum lttng_error_code ret_code; | |
709 | const char *name = NULL; | |
710 | ||
a0377dfe FD |
711 | LTTNG_ASSERT(expression); |
712 | LTTNG_ASSERT(writer); | |
713 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD); | |
6a751b95 JR |
714 | |
715 | name = lttng_event_expr_channel_context_field_get_name(expression); | |
a0377dfe | 716 | LTTNG_ASSERT(name); |
6a751b95 JR |
717 | |
718 | /* Open event expr channel context field element. */ | |
719 | ret = mi_lttng_writer_open_element(writer, | |
720 | mi_lttng_element_event_expr_channel_context_field); | |
721 | if (ret) { | |
722 | goto mi_error; | |
723 | } | |
724 | ||
725 | /* Name. */ | |
726 | ret = mi_lttng_writer_write_element_string( | |
727 | writer, config_element_name, name); | |
728 | if (ret) { | |
729 | goto mi_error; | |
730 | } | |
731 | ||
732 | /* Close event expr channel context field element. */ | |
733 | ret = mi_lttng_writer_close_element(writer); | |
734 | if (ret) { | |
735 | goto mi_error; | |
736 | } | |
737 | ||
738 | ret_code = LTTNG_OK; | |
739 | goto end; | |
740 | ||
741 | mi_error: | |
742 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
743 | end: | |
744 | return ret_code; | |
745 | } | |
746 | ||
747 | static | |
748 | enum lttng_error_code lttng_event_expr_app_specific_context_field_mi_serialize( | |
749 | const struct lttng_event_expr *expression, | |
750 | struct mi_writer *writer) | |
751 | { | |
752 | int ret; | |
753 | enum lttng_error_code ret_code; | |
754 | const char *provider_name = NULL; | |
755 | const char *type_name = NULL; | |
756 | ||
a0377dfe FD |
757 | LTTNG_ASSERT(expression); |
758 | LTTNG_ASSERT(writer); | |
759 | LTTNG_ASSERT(expression->type == | |
6a751b95 JR |
760 | LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD); |
761 | ||
762 | provider_name = lttng_event_expr_app_specific_context_field_get_provider_name( | |
763 | expression); | |
a0377dfe | 764 | LTTNG_ASSERT(provider_name); |
6a751b95 JR |
765 | |
766 | type_name = lttng_event_expr_app_specific_context_field_get_type_name( | |
767 | expression); | |
a0377dfe | 768 | LTTNG_ASSERT(provider_name); |
6a751b95 JR |
769 | |
770 | /* Open event expr app specific context field element. */ | |
771 | ret = mi_lttng_writer_open_element(writer, | |
772 | mi_lttng_element_event_expr_app_specific_context_field); | |
773 | if (ret) { | |
774 | goto mi_error; | |
775 | } | |
776 | ||
777 | /* Provider name. */ | |
778 | ret = mi_lttng_writer_write_element_string(writer, | |
779 | mi_lttng_element_event_expr_provider_name, | |
780 | provider_name); | |
781 | if (ret) { | |
782 | goto mi_error; | |
783 | } | |
784 | ||
785 | /* Type name. */ | |
786 | ret = mi_lttng_writer_write_element_string(writer, | |
787 | mi_lttng_element_event_expr_type_name, type_name); | |
788 | if (ret) { | |
789 | goto mi_error; | |
790 | } | |
791 | ||
792 | /* Close event expr app specific context field element. */ | |
793 | ret = mi_lttng_writer_close_element(writer); | |
794 | if (ret) { | |
795 | goto mi_error; | |
796 | } | |
797 | ||
798 | ret_code = LTTNG_OK; | |
799 | goto end; | |
800 | ||
801 | mi_error: | |
802 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
803 | end: | |
804 | return ret_code; | |
805 | } | |
806 | ||
807 | static | |
808 | enum lttng_error_code lttng_event_expr_array_field_element_mi_serialize( | |
809 | const struct lttng_event_expr *expression, | |
810 | struct mi_writer *writer) | |
811 | { | |
812 | int ret; | |
813 | enum lttng_error_code ret_code; | |
814 | enum lttng_event_expr_status status; | |
815 | const struct lttng_event_expr *parent_expr = NULL; | |
816 | unsigned int index; | |
817 | ||
a0377dfe FD |
818 | LTTNG_ASSERT(expression); |
819 | LTTNG_ASSERT(writer); | |
820 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT); | |
6a751b95 JR |
821 | |
822 | status = lttng_event_expr_array_field_element_get_index( | |
823 | expression, &index); | |
a0377dfe | 824 | LTTNG_ASSERT(status == LTTNG_EVENT_EXPR_STATUS_OK); |
6a751b95 JR |
825 | |
826 | parent_expr = lttng_event_expr_array_field_element_get_parent_expr( | |
827 | expression); | |
a0377dfe | 828 | LTTNG_ASSERT(parent_expr != NULL); |
6a751b95 JR |
829 | |
830 | /* Open event expr array field element. */ | |
831 | ret = mi_lttng_writer_open_element(writer, | |
832 | mi_lttng_element_event_expr_array_field_element); | |
833 | if (ret) { | |
834 | goto mi_error; | |
835 | } | |
836 | ||
837 | /* Index. */ | |
838 | ret = mi_lttng_writer_write_element_unsigned_int( | |
839 | writer, mi_lttng_element_event_expr_index, index); | |
840 | if (ret) { | |
841 | goto mi_error; | |
842 | } | |
843 | ||
844 | /* Parent expression. */ | |
845 | ret_code = lttng_event_expr_mi_serialize(parent_expr, writer); | |
846 | if (ret_code != LTTNG_OK) { | |
847 | goto end; | |
848 | } | |
849 | ||
850 | /* Close event expr array field element. */ | |
851 | ret = mi_lttng_writer_close_element(writer); | |
852 | if (ret) { | |
853 | goto mi_error; | |
854 | } | |
855 | ||
856 | ret_code = LTTNG_OK; | |
857 | goto end; | |
858 | ||
859 | mi_error: | |
860 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
861 | end: | |
862 | return ret_code; | |
863 | } | |
864 | ||
6a751b95 JR |
865 | enum lttng_error_code lttng_event_expr_mi_serialize( |
866 | const struct lttng_event_expr *expression, | |
867 | struct mi_writer *writer) | |
868 | { | |
869 | int ret; | |
870 | enum lttng_error_code ret_code; | |
871 | ||
a0377dfe FD |
872 | LTTNG_ASSERT(expression); |
873 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
874 | |
875 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_expr); | |
876 | if (ret) { | |
877 | goto mi_error; | |
878 | } | |
879 | ||
880 | switch (expression->type) { | |
881 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
882 | ret_code = lttng_event_expr_event_payload_field_mi_serialize( | |
883 | expression, writer); | |
884 | break; | |
885 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
886 | ret_code = lttng_event_expr_channel_context_field_mi_serialize( | |
887 | expression, writer); | |
888 | break; | |
889 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
890 | ret_code = lttng_event_expr_app_specific_context_field_mi_serialize( | |
891 | expression, writer); | |
892 | break; | |
893 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
894 | ret_code = lttng_event_expr_array_field_element_mi_serialize( | |
895 | expression, writer); | |
896 | break; | |
897 | default: | |
898 | abort(); | |
899 | } | |
900 | ||
901 | if (ret_code != LTTNG_OK) { | |
902 | goto end; | |
903 | } | |
904 | ||
905 | ret = mi_lttng_writer_close_element(writer); | |
906 | if (ret) { | |
907 | goto mi_error; | |
908 | } | |
909 | ||
910 | ret_code = LTTNG_OK; | |
911 | goto end; | |
912 | ||
913 | mi_error: | |
914 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
915 | ||
916 | end: | |
917 | return ret_code; | |
918 | } |