Commit | Line | Data |
---|---|---|
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 | |
c9e313bc SM |
11 | #include <common/bytecode/bytecode.hpp> |
12 | #include <common/error.hpp> | |
13 | #include <common/macros.hpp> | |
14 | #include <common/mi-lttng.hpp> | |
28ab034a | 15 | |
c9e313bc | 16 | #include <lttng/event-expr-internal.hpp> |
1aa9c49c | 17 | #include <lttng/event-expr.h> |
28ab034a JG |
18 | |
19 | #include <stddef.h> | |
1aa9c49c | 20 | #include <stdio.h> |
48c47564 | 21 | |
28ab034a | 22 | enum lttng_event_expr_type lttng_event_expr_get_type(const struct lttng_event_expr *expr) |
48c47564 PP |
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 | ||
28ab034a | 37 | static struct lttng_event_expr *create_empty_expr(enum lttng_event_expr_type type, size_t size) |
48c47564 PP |
38 | { |
39 | struct lttng_event_expr *expr; | |
40 | ||
64803277 | 41 | expr = zmalloc<lttng_event_expr>(size); |
48c47564 PP |
42 | if (!expr) { |
43 | goto end; | |
44 | } | |
45 | ||
46 | expr->type = type; | |
47 | ||
48 | end: | |
49 | return expr; | |
50 | } | |
51 | ||
28ab034a JG |
52 | static struct lttng_event_expr_field *create_field_event_expr(enum lttng_event_expr_type type, |
53 | const char *name) | |
48c47564 | 54 | { |
0114db0e | 55 | struct lttng_event_expr_field *expr = lttng::utils::container_of( |
28ab034a | 56 | create_empty_expr(type, sizeof(*expr)), <tng_event_expr_field::parent); |
48c47564 PP |
57 | |
58 | if (!expr) { | |
59 | goto error; | |
60 | } | |
61 | ||
a0377dfe | 62 | LTTNG_ASSERT(name); |
48c47564 PP |
63 | expr->name = strdup(name); |
64 | if (!expr->name) { | |
65 | goto error; | |
66 | } | |
67 | ||
68 | goto end; | |
69 | ||
70 | error: | |
5b5ad96e FD |
71 | if (expr) { |
72 | lttng_event_expr_destroy(&expr->parent); | |
73 | } | |
cd9adb8b | 74 | expr = nullptr; |
48c47564 PP |
75 | |
76 | end: | |
77 | return expr; | |
78 | } | |
79 | ||
28ab034a | 80 | struct lttng_event_expr *lttng_event_expr_event_payload_field_create(const char *field_name) |
48c47564 | 81 | { |
cd9adb8b | 82 | struct lttng_event_expr *expr = nullptr; |
48c47564 PP |
83 | |
84 | if (!field_name) { | |
85 | goto end; | |
86 | } | |
87 | ||
28ab034a JG |
88 | expr = &create_field_event_expr(LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD, field_name) |
89 | ->parent; | |
48c47564 PP |
90 | |
91 | end: | |
92 | return expr; | |
93 | } | |
94 | ||
28ab034a | 95 | struct lttng_event_expr *lttng_event_expr_channel_context_field_create(const char *field_name) |
48c47564 | 96 | { |
cd9adb8b | 97 | struct lttng_event_expr *expr = nullptr; |
48c47564 PP |
98 | |
99 | if (!field_name) { | |
100 | goto end; | |
101 | } | |
102 | ||
28ab034a JG |
103 | expr = &create_field_event_expr(LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD, field_name) |
104 | ->parent; | |
48c47564 PP |
105 | |
106 | end: | |
107 | return expr; | |
108 | } | |
109 | ||
28ab034a JG |
110 | struct lttng_event_expr * |
111 | lttng_event_expr_app_specific_context_field_create(const char *provider_name, const char *type_name) | |
48c47564 | 112 | { |
cd9adb8b | 113 | struct lttng_event_expr_app_specific_context_field *expr = nullptr; |
5b5ad96e | 114 | struct lttng_event_expr *ret_parent_expr; |
48c47564 PP |
115 | |
116 | if (!type_name || !provider_name) { | |
117 | goto error; | |
118 | } | |
119 | ||
28ab034a JG |
120 | expr = lttng::utils::container_of( |
121 | create_empty_expr(LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD, sizeof(*expr)), | |
122 | <tng_event_expr_app_specific_context_field::parent); | |
48c47564 PP |
123 | if (!expr) { |
124 | goto error; | |
125 | } | |
126 | ||
127 | expr->provider_name = strdup(provider_name); | |
128 | if (!expr->provider_name) { | |
129 | goto error; | |
130 | } | |
131 | ||
132 | expr->type_name = strdup(type_name); | |
133 | if (!expr->type_name) { | |
134 | goto error; | |
135 | } | |
136 | ||
5b5ad96e | 137 | ret_parent_expr = &expr->parent; |
48c47564 PP |
138 | goto end; |
139 | ||
140 | error: | |
5b5ad96e FD |
141 | if (expr) { |
142 | lttng_event_expr_destroy(&expr->parent); | |
143 | } | |
cd9adb8b | 144 | ret_parent_expr = nullptr; |
48c47564 PP |
145 | |
146 | end: | |
5b5ad96e | 147 | return ret_parent_expr; |
48c47564 PP |
148 | } |
149 | ||
28ab034a JG |
150 | struct lttng_event_expr * |
151 | lttng_event_expr_array_field_element_create(struct lttng_event_expr *array_field_expr, | |
152 | unsigned int index) | |
48c47564 | 153 | { |
cd9adb8b | 154 | struct lttng_event_expr_array_field_element *expr = nullptr; |
5b5ad96e | 155 | struct lttng_event_expr *ret_parent_expr; |
48c47564 PP |
156 | |
157 | /* The parent array field expression must be an l-value */ | |
28ab034a | 158 | if (!array_field_expr || !lttng_event_expr_is_lvalue(array_field_expr)) { |
48c47564 PP |
159 | goto error; |
160 | } | |
161 | ||
28ab034a JG |
162 | expr = lttng::utils::container_of( |
163 | create_empty_expr(LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT, sizeof(*expr)), | |
164 | <tng_event_expr_array_field_element::parent); | |
48c47564 PP |
165 | if (!expr) { |
166 | goto error; | |
167 | } | |
168 | ||
169 | expr->array_field_expr = array_field_expr; | |
170 | expr->index = index; | |
5b5ad96e | 171 | ret_parent_expr = &expr->parent; |
48c47564 PP |
172 | goto end; |
173 | ||
174 | error: | |
cd9adb8b | 175 | ret_parent_expr = nullptr; |
48c47564 PP |
176 | |
177 | end: | |
5b5ad96e | 178 | return ret_parent_expr; |
48c47564 PP |
179 | } |
180 | ||
28ab034a | 181 | const char *lttng_event_expr_event_payload_field_get_name(const struct lttng_event_expr *expr) |
48c47564 | 182 | { |
cd9adb8b | 183 | const char *ret = nullptr; |
48c47564 PP |
184 | |
185 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD) { | |
186 | goto end; | |
187 | } | |
188 | ||
28ab034a | 189 | ret = lttng::utils::container_of(expr, <tng_event_expr_field::parent)->name; |
48c47564 PP |
190 | |
191 | end: | |
192 | return ret; | |
193 | } | |
194 | ||
28ab034a | 195 | const char *lttng_event_expr_channel_context_field_get_name(const struct lttng_event_expr *expr) |
48c47564 | 196 | { |
cd9adb8b | 197 | const char *ret = nullptr; |
48c47564 PP |
198 | |
199 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD) { | |
200 | goto end; | |
201 | } | |
202 | ||
28ab034a | 203 | ret = lttng::utils::container_of(expr, <tng_event_expr_field::parent)->name; |
48c47564 PP |
204 | |
205 | end: | |
206 | return ret; | |
207 | } | |
208 | ||
28ab034a JG |
209 | const char * |
210 | lttng_event_expr_app_specific_context_field_get_provider_name(const struct lttng_event_expr *expr) | |
48c47564 | 211 | { |
cd9adb8b | 212 | const char *ret = nullptr; |
48c47564 PP |
213 | |
214 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD) { | |
215 | goto end; | |
216 | } | |
217 | ||
28ab034a JG |
218 | ret = lttng::utils::container_of(expr, <tng_event_expr_app_specific_context_field::parent) |
219 | ->provider_name; | |
48c47564 PP |
220 | |
221 | end: | |
222 | return ret; | |
223 | } | |
224 | ||
28ab034a JG |
225 | const char * |
226 | lttng_event_expr_app_specific_context_field_get_type_name(const struct lttng_event_expr *expr) | |
48c47564 | 227 | { |
cd9adb8b | 228 | const char *ret = nullptr; |
48c47564 PP |
229 | |
230 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD) { | |
231 | goto end; | |
232 | } | |
233 | ||
28ab034a JG |
234 | ret = lttng::utils::container_of(expr, <tng_event_expr_app_specific_context_field::parent) |
235 | ->type_name; | |
48c47564 PP |
236 | |
237 | end: | |
238 | return ret; | |
239 | } | |
240 | ||
241 | const struct lttng_event_expr * | |
28ab034a | 242 | lttng_event_expr_array_field_element_get_parent_expr(const struct lttng_event_expr *expr) |
48c47564 | 243 | { |
cd9adb8b | 244 | const struct lttng_event_expr *ret = nullptr; |
48c47564 PP |
245 | |
246 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT) { | |
247 | goto end; | |
248 | } | |
249 | ||
28ab034a JG |
250 | ret = lttng::utils::container_of(expr, <tng_event_expr_array_field_element::parent) |
251 | ->array_field_expr; | |
48c47564 PP |
252 | |
253 | end: | |
254 | return ret; | |
255 | } | |
256 | ||
28ab034a JG |
257 | enum lttng_event_expr_status |
258 | lttng_event_expr_array_field_element_get_index(const struct lttng_event_expr *expr, | |
259 | unsigned int *index) | |
48c47564 PP |
260 | { |
261 | enum lttng_event_expr_status ret = LTTNG_EVENT_EXPR_STATUS_OK; | |
262 | ||
28ab034a | 263 | if (!expr || expr->type != LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT || !index) { |
48c47564 PP |
264 | ret = LTTNG_EVENT_EXPR_STATUS_INVALID; |
265 | goto end; | |
266 | } | |
267 | ||
28ab034a JG |
268 | *index = lttng::utils::container_of(expr, <tng_event_expr_array_field_element::parent) |
269 | ->index; | |
48c47564 PP |
270 | |
271 | end: | |
272 | return ret; | |
273 | } | |
274 | ||
275 | bool lttng_event_expr_is_equal(const struct lttng_event_expr *expr_a, | |
28ab034a | 276 | const struct lttng_event_expr *expr_b) |
48c47564 PP |
277 | { |
278 | bool is_equal = true; | |
279 | ||
280 | if (!expr_a && !expr_b) { | |
281 | /* Both `NULL`: equal */ | |
282 | goto end; | |
283 | } | |
284 | ||
285 | if (!expr_a || !expr_b) { | |
286 | /* Only one `NULL`: not equal */ | |
287 | goto not_equal; | |
288 | } | |
289 | ||
290 | if (expr_a->type != expr_b->type) { | |
291 | /* Different types: not equal */ | |
292 | goto not_equal; | |
293 | } | |
294 | ||
295 | switch (expr_a->type) { | |
296 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
297 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
298 | { | |
299 | const struct lttng_event_expr_field *field_expr_a = | |
28ab034a | 300 | lttng::utils::container_of(expr_a, <tng_event_expr_field::parent); |
48c47564 | 301 | const struct lttng_event_expr_field *field_expr_b = |
28ab034a | 302 | lttng::utils::container_of(expr_b, <tng_event_expr_field::parent); |
48c47564 PP |
303 | |
304 | if (strcmp(field_expr_a->name, field_expr_b->name) != 0) { | |
305 | goto not_equal; | |
306 | } | |
307 | ||
308 | break; | |
309 | } | |
310 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
311 | { | |
312 | const struct lttng_event_expr_app_specific_context_field *field_expr_a = | |
28ab034a JG |
313 | lttng::utils::container_of( |
314 | expr_a, <tng_event_expr_app_specific_context_field::parent); | |
48c47564 | 315 | const struct lttng_event_expr_app_specific_context_field *field_expr_b = |
28ab034a JG |
316 | lttng::utils::container_of( |
317 | expr_b, <tng_event_expr_app_specific_context_field::parent); | |
48c47564 | 318 | |
28ab034a | 319 | if (strcmp(field_expr_a->provider_name, field_expr_b->provider_name) != 0) { |
48c47564 PP |
320 | goto not_equal; |
321 | } | |
322 | ||
28ab034a | 323 | if (strcmp(field_expr_a->type_name, field_expr_b->type_name) != 0) { |
48c47564 PP |
324 | goto not_equal; |
325 | } | |
326 | ||
327 | break; | |
328 | } | |
329 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
330 | { | |
331 | const struct lttng_event_expr_array_field_element *elem_expr_a = | |
28ab034a JG |
332 | lttng::utils::container_of(expr_a, |
333 | <tng_event_expr_array_field_element::parent); | |
48c47564 | 334 | const struct lttng_event_expr_array_field_element *elem_expr_b = |
28ab034a JG |
335 | lttng::utils::container_of(expr_b, |
336 | <tng_event_expr_array_field_element::parent); | |
48c47564 PP |
337 | |
338 | if (!lttng_event_expr_is_equal(elem_expr_a->array_field_expr, | |
28ab034a | 339 | elem_expr_b->array_field_expr)) { |
48c47564 PP |
340 | goto not_equal; |
341 | } | |
342 | ||
343 | if (elem_expr_a->index != elem_expr_b->index) { | |
344 | goto not_equal; | |
345 | } | |
346 | ||
347 | break; | |
348 | } | |
349 | default: | |
350 | break; | |
351 | } | |
352 | ||
353 | goto end; | |
354 | ||
355 | not_equal: | |
356 | is_equal = false; | |
357 | ||
358 | end: | |
359 | return is_equal; | |
360 | } | |
361 | ||
362 | void lttng_event_expr_destroy(struct lttng_event_expr *expr) | |
363 | { | |
364 | if (!expr) { | |
365 | goto end; | |
366 | } | |
367 | ||
368 | switch (expr->type) { | |
369 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
370 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
371 | { | |
372 | struct lttng_event_expr_field *field_expr = | |
28ab034a | 373 | lttng::utils::container_of(expr, <tng_event_expr_field::parent); |
48c47564 PP |
374 | |
375 | free(field_expr->name); | |
376 | break; | |
377 | } | |
378 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
379 | { | |
380 | struct lttng_event_expr_app_specific_context_field *field_expr = | |
28ab034a JG |
381 | lttng::utils::container_of( |
382 | expr, <tng_event_expr_app_specific_context_field::parent); | |
48c47564 PP |
383 | |
384 | free(field_expr->provider_name); | |
385 | free(field_expr->type_name); | |
386 | break; | |
387 | } | |
388 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
389 | { | |
28ab034a JG |
390 | struct lttng_event_expr_array_field_element *elem_expr = lttng::utils::container_of( |
391 | expr, <tng_event_expr_array_field_element::parent); | |
48c47564 PP |
392 | |
393 | lttng_event_expr_destroy(elem_expr->array_field_expr); | |
394 | break; | |
395 | } | |
396 | default: | |
397 | break; | |
398 | } | |
399 | ||
400 | free(expr); | |
401 | ||
402 | end: | |
403 | return; | |
404 | } | |
1aa9c49c JR |
405 | |
406 | static int event_expr_to_bytecode_recursive(const struct lttng_event_expr *expr, | |
28ab034a JG |
407 | struct lttng_bytecode_alloc **bytecode, |
408 | struct lttng_bytecode_alloc **bytecode_reloc) | |
1aa9c49c JR |
409 | { |
410 | int status; | |
411 | enum lttng_event_expr_status event_expr_status; | |
412 | ||
413 | switch (lttng_event_expr_get_type(expr)) { | |
414 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
415 | { | |
416 | const char *name; | |
417 | ||
418 | status = bytecode_push_get_payload_root(bytecode); | |
419 | if (status) { | |
420 | ERR("Failed to get payload root from bytecode"); | |
421 | goto end; | |
422 | } | |
423 | ||
424 | name = lttng_event_expr_event_payload_field_get_name(expr); | |
425 | if (!name) { | |
426 | ERR("Failed to get payload field name from event expression"); | |
427 | status = -1; | |
428 | goto end; | |
429 | } | |
430 | ||
28ab034a | 431 | status = bytecode_push_get_symbol(bytecode, bytecode_reloc, name); |
1aa9c49c JR |
432 | if (status) { |
433 | ERR("Failed to push 'get symbol %s' in bytecode", name); | |
434 | goto end; | |
435 | } | |
436 | ||
437 | break; | |
438 | } | |
439 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
440 | { | |
441 | const char *name; | |
442 | ||
443 | status = bytecode_push_get_context_root(bytecode); | |
444 | if (status) { | |
445 | ERR("Failed to get context root from bytecode"); | |
446 | goto end; | |
447 | } | |
448 | ||
449 | name = lttng_event_expr_channel_context_field_get_name(expr); | |
450 | if (!name) { | |
451 | ERR("Failed to get channel context field name from event expression"); | |
452 | status = -1; | |
453 | goto end; | |
454 | } | |
455 | ||
28ab034a | 456 | status = bytecode_push_get_symbol(bytecode, bytecode_reloc, name); |
1aa9c49c JR |
457 | if (status) { |
458 | ERR("Failed to push 'get symbol %s' in bytecode", name); | |
459 | goto end; | |
460 | } | |
461 | ||
462 | break; | |
463 | } | |
464 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
465 | { | |
466 | int ret; | |
cd9adb8b | 467 | char *name = nullptr; |
1aa9c49c JR |
468 | const char *provider_name, *type_name; |
469 | ||
470 | status = bytecode_push_get_app_context_root(bytecode); | |
471 | if (status) { | |
472 | ERR("Failed to get application context root from bytecode"); | |
473 | goto end; | |
474 | } | |
475 | ||
28ab034a | 476 | provider_name = lttng_event_expr_app_specific_context_field_get_provider_name(expr); |
1aa9c49c JR |
477 | if (!provider_name) { |
478 | ERR("Failed to get application context provider name from event expression"); | |
479 | status = -1; | |
480 | goto end; | |
481 | } | |
482 | ||
28ab034a | 483 | type_name = lttng_event_expr_app_specific_context_field_get_type_name(expr); |
1aa9c49c JR |
484 | if (!type_name) { |
485 | ERR("Failed to get application context type name from event expression"); | |
486 | status = -1; | |
487 | goto end; | |
488 | } | |
489 | ||
490 | /* | |
491 | * Reconstitute the app context field name from its two parts. | |
492 | */ | |
493 | ret = asprintf(&name, "%s:%s", provider_name, type_name); | |
494 | if (ret < 0) { | |
495 | PERROR("Failed to format application specific context: provider_name = '%s', type_name = '%s'", | |
28ab034a JG |
496 | provider_name, |
497 | type_name); | |
1aa9c49c JR |
498 | status = -1; |
499 | goto end; | |
500 | } | |
501 | ||
28ab034a | 502 | status = bytecode_push_get_symbol(bytecode, bytecode_reloc, name); |
1aa9c49c JR |
503 | free(name); |
504 | if (status) { | |
505 | ERR("Failed to push 'get symbol %s:%s' in bytecode", | |
28ab034a JG |
506 | provider_name, |
507 | type_name); | |
1aa9c49c JR |
508 | goto end; |
509 | } | |
510 | ||
511 | break; | |
512 | } | |
513 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
514 | { | |
515 | unsigned int index; | |
516 | const struct lttng_event_expr *parent; | |
517 | ||
28ab034a | 518 | parent = lttng_event_expr_array_field_element_get_parent_expr(expr); |
1aa9c49c JR |
519 | if (!parent) { |
520 | ERR("Failed to get parent expression from array event expression"); | |
521 | status = -1; | |
522 | goto end; | |
523 | } | |
524 | ||
28ab034a | 525 | status = event_expr_to_bytecode_recursive(parent, bytecode, bytecode_reloc); |
1aa9c49c JR |
526 | if (status) { |
527 | goto end; | |
528 | } | |
529 | ||
28ab034a | 530 | event_expr_status = lttng_event_expr_array_field_element_get_index(expr, &index); |
1aa9c49c JR |
531 | if (event_expr_status != LTTNG_EVENT_EXPR_STATUS_OK) { |
532 | ERR("Failed to get array field element index from event expression"); | |
533 | status = -1; | |
534 | goto end; | |
535 | } | |
536 | ||
537 | status = bytecode_push_get_index_u64(bytecode, index); | |
538 | if (status) { | |
539 | ERR("Failed to push 'get index %u' in bytecode", index); | |
540 | goto end; | |
541 | } | |
542 | ||
543 | break; | |
544 | } | |
545 | default: | |
546 | abort(); | |
547 | } | |
548 | ||
549 | status = 0; | |
550 | end: | |
551 | return status; | |
552 | } | |
553 | ||
1aa9c49c | 554 | int lttng_event_expr_to_bytecode(const struct lttng_event_expr *expr, |
28ab034a | 555 | struct lttng_bytecode **bytecode_out) |
1aa9c49c JR |
556 | { |
557 | int status; | |
558 | struct return_op ret_insn; | |
cd9adb8b JG |
559 | struct lttng_bytecode_alloc *bytecode = nullptr; |
560 | struct lttng_bytecode_alloc *bytecode_reloc = nullptr; | |
1aa9c49c JR |
561 | |
562 | status = bytecode_init(&bytecode); | |
563 | if (status) { | |
564 | ERR("Failed to initialize bytecode"); | |
565 | goto end; | |
566 | } | |
567 | ||
568 | status = bytecode_init(&bytecode_reloc); | |
569 | if (status) { | |
570 | ERR("Failed to initialize relocation bytecode"); | |
571 | goto end; | |
572 | } | |
573 | ||
28ab034a | 574 | status = event_expr_to_bytecode_recursive(expr, &bytecode, &bytecode_reloc); |
1aa9c49c JR |
575 | if (status) { |
576 | /* Errors already logged. */ | |
577 | goto end; | |
578 | } | |
579 | ||
580 | ret_insn.op = BYTECODE_OP_RETURN; | |
581 | bytecode_push(&bytecode, &ret_insn, 1, sizeof(ret_insn)); | |
582 | ||
583 | /* Append symbol table to bytecode. */ | |
584 | bytecode->b.reloc_table_offset = bytecode_get_len(&bytecode->b); | |
28ab034a JG |
585 | status = bytecode_push( |
586 | &bytecode, bytecode_reloc->b.data, 1, bytecode_get_len(&bytecode_reloc->b)); | |
1aa9c49c JR |
587 | if (status) { |
588 | ERR("Failed to push symbol table to bytecode"); | |
589 | goto end; | |
590 | } | |
591 | ||
592 | /* Copy the `lttng_bytecode` out of the `lttng_bytecode_alloc`. */ | |
593 | *bytecode_out = lttng_bytecode_copy(&bytecode->b); | |
594 | if (!*bytecode_out) { | |
595 | status = -1; | |
596 | goto end; | |
597 | } | |
598 | ||
599 | end: | |
600 | if (bytecode) { | |
601 | free(bytecode); | |
602 | } | |
603 | ||
604 | if (bytecode_reloc) { | |
605 | free(bytecode_reloc); | |
606 | } | |
607 | ||
608 | return status; | |
609 | } | |
6a751b95 | 610 | |
28ab034a JG |
611 | static enum lttng_error_code |
612 | lttng_event_expr_event_payload_field_mi_serialize(const struct lttng_event_expr *expression, | |
613 | struct mi_writer *writer) | |
6a751b95 JR |
614 | { |
615 | int ret; | |
616 | enum lttng_error_code ret_code; | |
cd9adb8b | 617 | const char *name = nullptr; |
6a751b95 | 618 | |
a0377dfe FD |
619 | LTTNG_ASSERT(expression); |
620 | LTTNG_ASSERT(writer); | |
621 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD); | |
6a751b95 JR |
622 | |
623 | name = lttng_event_expr_event_payload_field_get_name(expression); | |
a0377dfe | 624 | LTTNG_ASSERT(name); |
6a751b95 JR |
625 | |
626 | /* Open event expr payload field element. */ | |
28ab034a | 627 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_expr_payload_field); |
6a751b95 JR |
628 | if (ret) { |
629 | goto mi_error; | |
630 | } | |
631 | ||
632 | /* Name. */ | |
28ab034a | 633 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, name); |
6a751b95 JR |
634 | if (ret) { |
635 | goto mi_error; | |
636 | } | |
637 | ||
638 | /* Close event expr payload field element. */ | |
639 | ret = mi_lttng_writer_close_element(writer); | |
640 | if (ret) { | |
641 | goto mi_error; | |
642 | } | |
643 | ||
644 | ret_code = LTTNG_OK; | |
645 | goto end; | |
646 | ||
647 | mi_error: | |
648 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
649 | end: | |
650 | return ret_code; | |
651 | } | |
652 | ||
28ab034a JG |
653 | static enum lttng_error_code |
654 | lttng_event_expr_channel_context_field_mi_serialize(const struct lttng_event_expr *expression, | |
655 | struct mi_writer *writer) | |
6a751b95 JR |
656 | { |
657 | int ret; | |
658 | enum lttng_error_code ret_code; | |
cd9adb8b | 659 | const char *name = nullptr; |
6a751b95 | 660 | |
a0377dfe FD |
661 | LTTNG_ASSERT(expression); |
662 | LTTNG_ASSERT(writer); | |
663 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD); | |
6a751b95 JR |
664 | |
665 | name = lttng_event_expr_channel_context_field_get_name(expression); | |
a0377dfe | 666 | LTTNG_ASSERT(name); |
6a751b95 JR |
667 | |
668 | /* Open event expr channel context field element. */ | |
669 | ret = mi_lttng_writer_open_element(writer, | |
28ab034a | 670 | mi_lttng_element_event_expr_channel_context_field); |
6a751b95 JR |
671 | if (ret) { |
672 | goto mi_error; | |
673 | } | |
674 | ||
675 | /* Name. */ | |
28ab034a | 676 | ret = mi_lttng_writer_write_element_string(writer, config_element_name, name); |
6a751b95 JR |
677 | if (ret) { |
678 | goto mi_error; | |
679 | } | |
680 | ||
681 | /* Close event expr channel context field element. */ | |
682 | ret = mi_lttng_writer_close_element(writer); | |
683 | if (ret) { | |
684 | goto mi_error; | |
685 | } | |
686 | ||
687 | ret_code = LTTNG_OK; | |
688 | goto end; | |
689 | ||
690 | mi_error: | |
691 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
692 | end: | |
693 | return ret_code; | |
694 | } | |
695 | ||
28ab034a JG |
696 | static enum lttng_error_code |
697 | lttng_event_expr_app_specific_context_field_mi_serialize(const struct lttng_event_expr *expression, | |
698 | struct mi_writer *writer) | |
6a751b95 JR |
699 | { |
700 | int ret; | |
701 | enum lttng_error_code ret_code; | |
cd9adb8b JG |
702 | const char *provider_name = nullptr; |
703 | const char *type_name = nullptr; | |
6a751b95 | 704 | |
a0377dfe FD |
705 | LTTNG_ASSERT(expression); |
706 | LTTNG_ASSERT(writer); | |
28ab034a | 707 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD); |
6a751b95 | 708 | |
28ab034a | 709 | provider_name = lttng_event_expr_app_specific_context_field_get_provider_name(expression); |
a0377dfe | 710 | LTTNG_ASSERT(provider_name); |
6a751b95 | 711 | |
28ab034a | 712 | type_name = lttng_event_expr_app_specific_context_field_get_type_name(expression); |
a0377dfe | 713 | LTTNG_ASSERT(provider_name); |
6a751b95 JR |
714 | |
715 | /* Open event expr app specific context field element. */ | |
716 | ret = mi_lttng_writer_open_element(writer, | |
28ab034a | 717 | mi_lttng_element_event_expr_app_specific_context_field); |
6a751b95 JR |
718 | if (ret) { |
719 | goto mi_error; | |
720 | } | |
721 | ||
722 | /* Provider name. */ | |
28ab034a JG |
723 | ret = mi_lttng_writer_write_element_string( |
724 | writer, mi_lttng_element_event_expr_provider_name, provider_name); | |
6a751b95 JR |
725 | if (ret) { |
726 | goto mi_error; | |
727 | } | |
728 | ||
729 | /* Type name. */ | |
28ab034a JG |
730 | ret = mi_lttng_writer_write_element_string( |
731 | writer, mi_lttng_element_event_expr_type_name, type_name); | |
6a751b95 JR |
732 | if (ret) { |
733 | goto mi_error; | |
734 | } | |
735 | ||
736 | /* Close event expr app specific context field element. */ | |
737 | ret = mi_lttng_writer_close_element(writer); | |
738 | if (ret) { | |
739 | goto mi_error; | |
740 | } | |
741 | ||
742 | ret_code = LTTNG_OK; | |
743 | goto end; | |
744 | ||
745 | mi_error: | |
746 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
747 | end: | |
748 | return ret_code; | |
749 | } | |
750 | ||
28ab034a JG |
751 | static enum lttng_error_code |
752 | lttng_event_expr_array_field_element_mi_serialize(const struct lttng_event_expr *expression, | |
753 | struct mi_writer *writer) | |
6a751b95 JR |
754 | { |
755 | int ret; | |
756 | enum lttng_error_code ret_code; | |
757 | enum lttng_event_expr_status status; | |
cd9adb8b | 758 | const struct lttng_event_expr *parent_expr = nullptr; |
6a751b95 JR |
759 | unsigned int index; |
760 | ||
a0377dfe FD |
761 | LTTNG_ASSERT(expression); |
762 | LTTNG_ASSERT(writer); | |
763 | LTTNG_ASSERT(expression->type == LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT); | |
6a751b95 | 764 | |
28ab034a | 765 | status = lttng_event_expr_array_field_element_get_index(expression, &index); |
a0377dfe | 766 | LTTNG_ASSERT(status == LTTNG_EVENT_EXPR_STATUS_OK); |
6a751b95 | 767 | |
28ab034a | 768 | parent_expr = lttng_event_expr_array_field_element_get_parent_expr(expression); |
cd9adb8b | 769 | LTTNG_ASSERT(parent_expr != nullptr); |
6a751b95 JR |
770 | |
771 | /* Open event expr array field element. */ | |
28ab034a | 772 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_expr_array_field_element); |
6a751b95 JR |
773 | if (ret) { |
774 | goto mi_error; | |
775 | } | |
776 | ||
777 | /* Index. */ | |
778 | ret = mi_lttng_writer_write_element_unsigned_int( | |
28ab034a | 779 | writer, mi_lttng_element_event_expr_index, index); |
6a751b95 JR |
780 | if (ret) { |
781 | goto mi_error; | |
782 | } | |
783 | ||
784 | /* Parent expression. */ | |
785 | ret_code = lttng_event_expr_mi_serialize(parent_expr, writer); | |
786 | if (ret_code != LTTNG_OK) { | |
787 | goto end; | |
788 | } | |
789 | ||
790 | /* Close event expr array field element. */ | |
791 | ret = mi_lttng_writer_close_element(writer); | |
792 | if (ret) { | |
793 | goto mi_error; | |
794 | } | |
795 | ||
796 | ret_code = LTTNG_OK; | |
797 | goto end; | |
798 | ||
799 | mi_error: | |
800 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
801 | end: | |
802 | return ret_code; | |
803 | } | |
804 | ||
28ab034a JG |
805 | enum lttng_error_code lttng_event_expr_mi_serialize(const struct lttng_event_expr *expression, |
806 | struct mi_writer *writer) | |
6a751b95 JR |
807 | { |
808 | int ret; | |
809 | enum lttng_error_code ret_code; | |
810 | ||
a0377dfe FD |
811 | LTTNG_ASSERT(expression); |
812 | LTTNG_ASSERT(writer); | |
6a751b95 JR |
813 | |
814 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_expr); | |
815 | if (ret) { | |
816 | goto mi_error; | |
817 | } | |
818 | ||
819 | switch (expression->type) { | |
820 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
28ab034a | 821 | ret_code = lttng_event_expr_event_payload_field_mi_serialize(expression, writer); |
6a751b95 JR |
822 | break; |
823 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
28ab034a | 824 | ret_code = lttng_event_expr_channel_context_field_mi_serialize(expression, writer); |
6a751b95 JR |
825 | break; |
826 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
28ab034a JG |
827 | ret_code = lttng_event_expr_app_specific_context_field_mi_serialize(expression, |
828 | writer); | |
6a751b95 JR |
829 | break; |
830 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
28ab034a | 831 | ret_code = lttng_event_expr_array_field_element_mi_serialize(expression, writer); |
6a751b95 JR |
832 | break; |
833 | default: | |
834 | abort(); | |
835 | } | |
836 | ||
837 | if (ret_code != LTTNG_OK) { | |
838 | goto end; | |
839 | } | |
840 | ||
841 | ret = mi_lttng_writer_close_element(writer); | |
842 | if (ret) { | |
843 | goto mi_error; | |
844 | } | |
845 | ||
846 | ret_code = LTTNG_OK; | |
847 | goto end; | |
848 | ||
849 | mi_error: | |
850 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
851 | ||
852 | end: | |
853 | return ret_code; | |
854 | } |