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683d081a JR |
1 | /* |
2 | * Copyright (C) 2020 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <assert.h> | |
9 | #include <common/error.h> | |
834966af | 10 | #include <common/event-expr-to-bytecode.h> |
683d081a | 11 | #include <common/macros.h> |
38114013 | 12 | #include <inttypes.h> |
7c920b63 | 13 | #include <limits.h> |
683d081a | 14 | #include <lttng/condition/condition-internal.h> |
834966af | 15 | #include <lttng/event-rule/event-rule-internal.h> |
683d081a JR |
16 | #include <lttng/condition/event-rule-internal.h> |
17 | #include <lttng/condition/event-rule.h> | |
38114013 PP |
18 | #include <lttng/event-expr-internal.h> |
19 | #include <lttng/event-expr.h> | |
7c920b63 PP |
20 | #include <lttng/event-field-value-internal.h> |
21 | #include <lttng/event-rule/event-rule-internal.h> | |
834966af | 22 | #include <lttng/lttng-error.h> |
683d081a | 23 | #include <stdbool.h> |
38114013 | 24 | #include <stdint.h> |
116a02e3 | 25 | #include <vendor/msgpack/msgpack.h> |
683d081a JR |
26 | |
27 | #define IS_EVENT_RULE_CONDITION(condition) \ | |
28 | (lttng_condition_get_type(condition) == \ | |
29 | LTTNG_CONDITION_TYPE_EVENT_RULE_HIT) | |
30 | ||
31 | static bool is_event_rule_evaluation(const struct lttng_evaluation *evaluation) | |
32 | { | |
33 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); | |
34 | ||
35 | return type == LTTNG_CONDITION_TYPE_EVENT_RULE_HIT; | |
36 | } | |
37 | ||
38 | static bool lttng_condition_event_rule_validate( | |
39 | const struct lttng_condition *condition); | |
40 | static int lttng_condition_event_rule_serialize( | |
41 | const struct lttng_condition *condition, | |
42 | struct lttng_payload *payload); | |
43 | static bool lttng_condition_event_rule_is_equal( | |
44 | const struct lttng_condition *_a, | |
45 | const struct lttng_condition *_b); | |
46 | static void lttng_condition_event_rule_destroy( | |
47 | struct lttng_condition *condition); | |
48 | ||
49 | static bool lttng_condition_event_rule_validate( | |
50 | const struct lttng_condition *condition) | |
51 | { | |
52 | bool valid = false; | |
53 | struct lttng_condition_event_rule *event_rule; | |
54 | ||
55 | if (!condition) { | |
56 | goto end; | |
57 | } | |
58 | ||
59 | event_rule = container_of( | |
60 | condition, struct lttng_condition_event_rule, parent); | |
61 | if (!event_rule->rule) { | |
7c920b63 | 62 | ERR("Invalid event rule condition: a rule must be set"); |
683d081a JR |
63 | goto end; |
64 | } | |
65 | ||
66 | valid = lttng_event_rule_validate(event_rule->rule); | |
67 | end: | |
68 | return valid; | |
69 | } | |
70 | ||
7c920b63 PP |
71 | static const char *msgpack_object_type_str(msgpack_object_type type) |
72 | { | |
73 | const char *name; | |
74 | ||
75 | switch (type) { | |
76 | case MSGPACK_OBJECT_NIL: | |
77 | name = "MSGPACK_OBJECT_NIL"; | |
78 | break; | |
79 | case MSGPACK_OBJECT_BOOLEAN: | |
80 | name = "MSGPACK_OBJECT_BOOLEAN"; | |
81 | break; | |
82 | case MSGPACK_OBJECT_POSITIVE_INTEGER: | |
83 | name = "MSGPACK_OBJECT_POSITIVE_INTEGER"; | |
84 | break; | |
85 | case MSGPACK_OBJECT_NEGATIVE_INTEGER: | |
86 | name = "MSGPACK_OBJECT_NEGATIVE_INTEGER"; | |
87 | break; | |
88 | case MSGPACK_OBJECT_FLOAT32: | |
89 | name = "MSGPACK_OBJECT_FLOAT32"; | |
90 | break; | |
91 | case MSGPACK_OBJECT_FLOAT: | |
92 | /* Same value as MSGPACK_OBJECT_FLOAT64 */ | |
93 | name = "MSGPACK_OBJECT_FLOAT(64)"; | |
94 | break; | |
95 | case MSGPACK_OBJECT_STR: | |
96 | name = "MSGPACK_OBJECT_STR"; | |
97 | break; | |
98 | case MSGPACK_OBJECT_ARRAY: | |
99 | name = "MSGPACK_OBJECT_ARRAY"; | |
100 | break; | |
101 | case MSGPACK_OBJECT_MAP: | |
102 | name = "MSGPACK_OBJECT_MAP"; | |
103 | break; | |
104 | case MSGPACK_OBJECT_BIN: | |
105 | name = "MSGPACK_OBJECT_BIN"; | |
106 | break; | |
107 | case MSGPACK_OBJECT_EXT: | |
108 | name = "MSGPACK_OBJECT_EXT"; | |
109 | break; | |
110 | default: | |
111 | abort(); | |
112 | } | |
113 | ||
114 | return name; | |
115 | } | |
116 | ||
38114013 PP |
117 | /* |
118 | * Serializes the C string `str` into `buf`. | |
119 | * | |
120 | * Encoding is the length of `str` plus one (for the null character), | |
121 | * and then the string, including its null terminator. | |
122 | */ | |
123 | static | |
124 | int serialize_cstr(const char *str, struct lttng_dynamic_buffer *buf) | |
125 | { | |
126 | int ret; | |
127 | const uint32_t len = strlen(str) + 1; | |
128 | ||
129 | /* Serialize the length, including the null terminator. */ | |
130 | DBG("Serializing C string's length (including null terminator): " | |
131 | "%" PRIu32, len); | |
132 | ret = lttng_dynamic_buffer_append(buf, &len, sizeof(len)); | |
133 | if (ret) { | |
134 | goto end; | |
135 | } | |
136 | ||
137 | /* Serialize the string. */ | |
138 | DBG("Serializing C string: '%s'", str); | |
139 | ret = lttng_dynamic_buffer_append(buf, str, len); | |
140 | if (ret) { | |
141 | goto end; | |
142 | } | |
143 | ||
144 | end: | |
145 | return ret; | |
146 | } | |
147 | ||
148 | /* | |
149 | * Serializes the event expression `expr` into `buf`. | |
150 | */ | |
151 | static | |
152 | int serialize_event_expr(const struct lttng_event_expr *expr, | |
153 | struct lttng_payload *payload) | |
154 | { | |
155 | const uint8_t type = expr->type; | |
156 | int ret; | |
157 | ||
158 | /* Serialize the expression's type. */ | |
159 | DBG("Serializing event expression's type: %d", expr->type); | |
160 | ret = lttng_dynamic_buffer_append(&payload->buffer, &type, sizeof(type)); | |
161 | if (ret) { | |
162 | goto end; | |
163 | } | |
164 | ||
165 | /* Serialize the expression */ | |
166 | switch (expr->type) { | |
167 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
168 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
169 | { | |
170 | const struct lttng_event_expr_field *field_expr = | |
171 | container_of(expr, | |
172 | const struct lttng_event_expr_field, | |
173 | parent); | |
174 | ||
175 | /* Serialize the field name. */ | |
176 | DBG("Serializing field event expression's field name: '%s'", | |
177 | field_expr->name); | |
178 | ret = serialize_cstr(field_expr->name, &payload->buffer); | |
179 | if (ret) { | |
180 | goto end; | |
181 | } | |
182 | ||
183 | break; | |
184 | } | |
185 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
186 | { | |
187 | const struct lttng_event_expr_app_specific_context_field *field_expr = | |
188 | container_of(expr, | |
189 | const struct lttng_event_expr_app_specific_context_field, | |
190 | parent); | |
191 | ||
192 | /* Serialize the provider name. */ | |
193 | DBG("Serializing app-specific context field event expression's " | |
194 | "provider name: '%s'", | |
195 | field_expr->provider_name); | |
196 | ret = serialize_cstr(field_expr->provider_name, &payload->buffer); | |
197 | if (ret) { | |
198 | goto end; | |
199 | } | |
200 | ||
201 | /* Serialize the type name. */ | |
202 | DBG("Serializing app-specific context field event expression's " | |
203 | "type name: '%s'", | |
204 | field_expr->provider_name); | |
205 | ret = serialize_cstr(field_expr->type_name, &payload->buffer); | |
206 | if (ret) { | |
207 | goto end; | |
208 | } | |
209 | ||
210 | break; | |
211 | } | |
212 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
213 | { | |
214 | const struct lttng_event_expr_array_field_element *elem_expr = | |
215 | container_of(expr, | |
216 | const struct lttng_event_expr_array_field_element, | |
217 | parent); | |
218 | const uint32_t index = elem_expr->index; | |
219 | ||
220 | /* Serialize the index. */ | |
221 | DBG("Serializing array field element event expression's " | |
222 | "index: %u", elem_expr->index); | |
223 | ret = lttng_dynamic_buffer_append(&payload->buffer, &index, sizeof(index)); | |
224 | if (ret) { | |
225 | goto end; | |
226 | } | |
227 | ||
228 | /* Serialize the parent array field expression. */ | |
229 | DBG("Serializing array field element event expression's " | |
7c920b63 | 230 | "parent array field event expression"); |
38114013 PP |
231 | ret = serialize_event_expr(elem_expr->array_field_expr, payload); |
232 | if (ret) { | |
233 | goto end; | |
234 | } | |
235 | ||
236 | break; | |
237 | } | |
238 | default: | |
239 | break; | |
240 | } | |
241 | ||
242 | end: | |
243 | return ret; | |
244 | } | |
245 | ||
6fb7c690 JR |
246 | static |
247 | struct lttng_capture_descriptor * | |
248 | lttng_condition_event_rule_get_internal_capture_descriptor_at_index( | |
249 | const struct lttng_condition *condition, unsigned int index) | |
250 | { | |
251 | const struct lttng_condition_event_rule *event_rule_cond = | |
252 | container_of(condition, | |
253 | const struct lttng_condition_event_rule, | |
254 | parent); | |
255 | struct lttng_capture_descriptor *desc = NULL; | |
256 | unsigned int count; | |
257 | enum lttng_condition_status status; | |
258 | ||
259 | if (!condition || !IS_EVENT_RULE_CONDITION(condition)) { | |
260 | goto end; | |
261 | } | |
262 | ||
263 | status = lttng_condition_event_rule_get_capture_descriptor_count( | |
264 | condition, &count); | |
265 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
266 | goto end; | |
267 | } | |
268 | ||
269 | if (index >= count) { | |
270 | goto end; | |
271 | } | |
272 | ||
273 | desc = lttng_dynamic_pointer_array_get_pointer( | |
274 | &event_rule_cond->capture_descriptors, index); | |
275 | end: | |
276 | return desc; | |
277 | } | |
278 | ||
683d081a JR |
279 | static int lttng_condition_event_rule_serialize( |
280 | const struct lttng_condition *condition, | |
281 | struct lttng_payload *payload) | |
282 | { | |
283 | int ret; | |
683d081a | 284 | struct lttng_condition_event_rule *event_rule; |
0912b5ea | 285 | enum lttng_condition_status status; |
38114013 PP |
286 | /* Used for iteration and communication (size matters). */ |
287 | uint32_t i, capture_descr_count; | |
683d081a JR |
288 | |
289 | if (!condition || !IS_EVENT_RULE_CONDITION(condition)) { | |
290 | ret = -1; | |
291 | goto end; | |
292 | } | |
293 | ||
294 | DBG("Serializing event rule condition"); | |
295 | event_rule = container_of( | |
296 | condition, struct lttng_condition_event_rule, parent); | |
297 | ||
38114013 PP |
298 | DBG("Serializing event rule condition's event rule"); |
299 | ret = lttng_event_rule_serialize(event_rule->rule, payload); | |
683d081a JR |
300 | if (ret) { |
301 | goto end; | |
302 | } | |
303 | ||
0912b5ea JR |
304 | status = lttng_condition_event_rule_get_capture_descriptor_count( |
305 | condition, &capture_descr_count); | |
306 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
307 | ret = -1; | |
308 | goto end; | |
309 | }; | |
310 | ||
38114013 PP |
311 | DBG("Serializing event rule condition's capture descriptor count: %" PRIu32, |
312 | capture_descr_count); | |
313 | ret = lttng_dynamic_buffer_append(&payload->buffer, &capture_descr_count, | |
314 | sizeof(capture_descr_count)); | |
683d081a JR |
315 | if (ret) { |
316 | goto end; | |
317 | } | |
318 | ||
38114013 | 319 | for (i = 0; i < capture_descr_count; i++) { |
6fb7c690 JR |
320 | const struct lttng_capture_descriptor *desc = |
321 | lttng_condition_event_rule_get_internal_capture_descriptor_at_index( | |
0912b5ea | 322 | condition, i); |
38114013 PP |
323 | |
324 | DBG("Serializing event rule condition's capture descriptor %" PRIu32, | |
325 | i); | |
6fb7c690 | 326 | ret = serialize_event_expr(desc->event_expression, payload); |
38114013 PP |
327 | if (ret) { |
328 | goto end; | |
329 | } | |
330 | } | |
683d081a JR |
331 | |
332 | end: | |
333 | return ret; | |
334 | } | |
335 | ||
38114013 PP |
336 | static |
337 | bool capture_descriptors_are_equal( | |
0912b5ea JR |
338 | const struct lttng_condition *condition_a, |
339 | const struct lttng_condition *condition_b) | |
38114013 PP |
340 | { |
341 | bool is_equal = true; | |
0912b5ea JR |
342 | unsigned int capture_descr_count_a; |
343 | unsigned int capture_descr_count_b; | |
38114013 | 344 | size_t i; |
0912b5ea | 345 | enum lttng_condition_status status; |
38114013 | 346 | |
0912b5ea JR |
347 | status = lttng_condition_event_rule_get_capture_descriptor_count( |
348 | condition_a, &capture_descr_count_a); | |
349 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
350 | goto not_equal; | |
351 | } | |
352 | ||
353 | status = lttng_condition_event_rule_get_capture_descriptor_count( | |
354 | condition_b, &capture_descr_count_b); | |
355 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
356 | goto not_equal; | |
357 | } | |
38114013 PP |
358 | |
359 | if (capture_descr_count_a != capture_descr_count_b) { | |
360 | goto not_equal; | |
361 | } | |
362 | ||
363 | for (i = 0; i < capture_descr_count_a; i++) { | |
364 | const struct lttng_event_expr *expr_a = | |
0912b5ea JR |
365 | lttng_condition_event_rule_get_capture_descriptor_at_index( |
366 | condition_a, | |
38114013 PP |
367 | i); |
368 | const struct lttng_event_expr *expr_b = | |
0912b5ea JR |
369 | lttng_condition_event_rule_get_capture_descriptor_at_index( |
370 | condition_b, | |
38114013 PP |
371 | i); |
372 | ||
373 | if (!lttng_event_expr_is_equal(expr_a, expr_b)) { | |
374 | goto not_equal; | |
375 | } | |
376 | } | |
377 | ||
378 | goto end; | |
379 | ||
380 | not_equal: | |
381 | is_equal = false; | |
382 | ||
383 | end: | |
384 | return is_equal; | |
385 | } | |
386 | ||
683d081a JR |
387 | static bool lttng_condition_event_rule_is_equal( |
388 | const struct lttng_condition *_a, | |
389 | const struct lttng_condition *_b) | |
390 | { | |
391 | bool is_equal = false; | |
392 | struct lttng_condition_event_rule *a, *b; | |
393 | ||
394 | a = container_of(_a, struct lttng_condition_event_rule, parent); | |
395 | b = container_of(_b, struct lttng_condition_event_rule, parent); | |
396 | ||
397 | /* Both event rules must be set or both must be unset. */ | |
398 | if ((a->rule && !b->rule) || (!a->rule && b->rule)) { | |
399 | WARN("Comparing event_rule conditions with uninitialized rule"); | |
400 | goto end; | |
401 | } | |
402 | ||
403 | is_equal = lttng_event_rule_is_equal(a->rule, b->rule); | |
38114013 PP |
404 | if (!is_equal) { |
405 | goto end; | |
406 | } | |
407 | ||
0912b5ea | 408 | is_equal = capture_descriptors_are_equal(_a, _b); |
38114013 | 409 | |
683d081a JR |
410 | end: |
411 | return is_equal; | |
412 | } | |
413 | ||
414 | static void lttng_condition_event_rule_destroy( | |
415 | struct lttng_condition *condition) | |
416 | { | |
417 | struct lttng_condition_event_rule *event_rule; | |
418 | ||
419 | event_rule = container_of( | |
420 | condition, struct lttng_condition_event_rule, parent); | |
421 | ||
422 | lttng_event_rule_put(event_rule->rule); | |
38114013 | 423 | lttng_dynamic_pointer_array_reset(&event_rule->capture_descriptors); |
683d081a JR |
424 | free(event_rule); |
425 | } | |
426 | ||
38114013 | 427 | static |
0912b5ea | 428 | void destroy_capture_descriptor(void *ptr) |
38114013 | 429 | { |
0912b5ea JR |
430 | struct lttng_capture_descriptor *desc = |
431 | (struct lttng_capture_descriptor *) ptr; | |
432 | ||
433 | lttng_event_expr_destroy(desc->event_expression); | |
434 | free(desc->bytecode); | |
435 | free(desc); | |
38114013 PP |
436 | } |
437 | ||
683d081a JR |
438 | struct lttng_condition *lttng_condition_event_rule_create( |
439 | struct lttng_event_rule *rule) | |
440 | { | |
441 | struct lttng_condition *parent = NULL; | |
442 | struct lttng_condition_event_rule *condition = NULL; | |
443 | ||
444 | if (!rule) { | |
445 | goto end; | |
446 | } | |
447 | ||
448 | condition = zmalloc(sizeof(struct lttng_condition_event_rule)); | |
449 | if (!condition) { | |
450 | return NULL; | |
451 | } | |
452 | ||
453 | lttng_condition_init(&condition->parent, | |
454 | LTTNG_CONDITION_TYPE_EVENT_RULE_HIT); | |
455 | condition->parent.validate = lttng_condition_event_rule_validate, | |
456 | condition->parent.serialize = lttng_condition_event_rule_serialize, | |
457 | condition->parent.equal = lttng_condition_event_rule_is_equal, | |
458 | condition->parent.destroy = lttng_condition_event_rule_destroy, | |
459 | ||
460 | lttng_event_rule_get(rule); | |
461 | condition->rule = rule; | |
462 | rule = NULL; | |
463 | ||
38114013 | 464 | lttng_dynamic_pointer_array_init(&condition->capture_descriptors, |
0912b5ea | 465 | destroy_capture_descriptor); |
38114013 | 466 | |
683d081a JR |
467 | parent = &condition->parent; |
468 | end: | |
469 | return parent; | |
470 | } | |
471 | ||
38114013 PP |
472 | static |
473 | uint64_t uint_from_buffer(const struct lttng_buffer_view *view, size_t size, | |
474 | size_t *offset) | |
475 | { | |
476 | uint64_t ret; | |
477 | const struct lttng_buffer_view uint_view = | |
478 | lttng_buffer_view_from_view(view, *offset, size); | |
479 | ||
480 | if (!lttng_buffer_view_is_valid(&uint_view)) { | |
481 | ret = UINT64_C(-1); | |
482 | goto end; | |
483 | } | |
484 | ||
485 | switch (size) { | |
486 | case 1: | |
487 | ret = (uint64_t) *uint_view.data; | |
488 | break; | |
489 | case sizeof(uint32_t): | |
490 | { | |
491 | uint32_t u32; | |
492 | ||
493 | memcpy(&u32, uint_view.data, sizeof(u32)); | |
494 | ret = (uint64_t) u32; | |
495 | break; | |
496 | } | |
497 | case sizeof(ret): | |
498 | memcpy(&ret, uint_view.data, sizeof(ret)); | |
499 | break; | |
500 | default: | |
501 | abort(); | |
502 | } | |
503 | ||
504 | *offset += size; | |
505 | ||
506 | end: | |
507 | return ret; | |
508 | } | |
509 | ||
510 | static | |
511 | const char *str_from_buffer(const struct lttng_buffer_view *view, | |
512 | size_t *offset) | |
513 | { | |
514 | uint64_t len; | |
515 | const char *ret; | |
516 | ||
517 | len = uint_from_buffer(view, sizeof(uint32_t), offset); | |
518 | if (len == UINT64_C(-1)) { | |
519 | goto error; | |
520 | } | |
521 | ||
522 | ret = &view->data[*offset]; | |
523 | ||
524 | if (!lttng_buffer_view_contains_string(view, ret, len)) { | |
525 | goto error; | |
526 | } | |
527 | ||
528 | *offset += len; | |
529 | goto end; | |
530 | ||
531 | error: | |
532 | ret = NULL; | |
533 | ||
534 | end: | |
535 | return ret; | |
536 | } | |
537 | ||
538 | static | |
539 | struct lttng_event_expr *event_expr_from_payload( | |
540 | struct lttng_payload_view *view, size_t *offset) | |
541 | { | |
542 | struct lttng_event_expr *expr = NULL; | |
543 | const char *str; | |
544 | uint64_t type; | |
545 | ||
546 | type = uint_from_buffer(&view->buffer, sizeof(uint8_t), offset); | |
547 | if (type == UINT64_C(-1)) { | |
548 | goto error; | |
549 | } | |
550 | ||
551 | switch (type) { | |
552 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
553 | str = str_from_buffer(&view->buffer, offset); | |
554 | if (!str) { | |
555 | goto error; | |
556 | } | |
557 | ||
558 | expr = lttng_event_expr_event_payload_field_create(str); | |
559 | break; | |
560 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
561 | str = str_from_buffer(&view->buffer, offset); | |
562 | if (!str) { | |
563 | goto error; | |
564 | } | |
565 | ||
566 | expr = lttng_event_expr_channel_context_field_create(str); | |
567 | break; | |
568 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
569 | { | |
570 | const char *provider_name; | |
571 | const char *type_name; | |
572 | ||
573 | provider_name = str_from_buffer(&view->buffer, offset); | |
574 | if (!provider_name) { | |
575 | goto error; | |
576 | } | |
577 | ||
578 | type_name = str_from_buffer(&view->buffer, offset); | |
579 | if (!type_name) { | |
580 | goto error; | |
581 | } | |
582 | ||
583 | expr = lttng_event_expr_app_specific_context_field_create( | |
584 | provider_name, type_name); | |
585 | break; | |
586 | } | |
587 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
588 | { | |
589 | struct lttng_event_expr *array_field_expr; | |
590 | const uint64_t index = uint_from_buffer( | |
591 | &view->buffer, sizeof(uint32_t), offset); | |
592 | ||
593 | if (index == UINT64_C(-1)) { | |
594 | goto error; | |
595 | } | |
596 | ||
597 | /* Array field expression is the encoded after this. */ | |
598 | array_field_expr = event_expr_from_payload(view, offset); | |
599 | if (!array_field_expr) { | |
600 | goto error; | |
601 | } | |
602 | ||
603 | /* Move ownership of `array_field_expr` to new expression. */ | |
604 | expr = lttng_event_expr_array_field_element_create( | |
605 | array_field_expr, (unsigned int) index); | |
606 | if (!expr) { | |
607 | /* `array_field_expr` not moved: destroy it. */ | |
608 | lttng_event_expr_destroy(array_field_expr); | |
609 | } | |
610 | ||
611 | break; | |
612 | } | |
613 | default: | |
614 | abort(); | |
615 | } | |
616 | ||
617 | goto end; | |
618 | ||
619 | error: | |
620 | lttng_event_expr_destroy(expr); | |
621 | expr = NULL; | |
622 | ||
623 | end: | |
624 | return expr; | |
625 | } | |
626 | ||
683d081a JR |
627 | LTTNG_HIDDEN |
628 | ssize_t lttng_condition_event_rule_create_from_payload( | |
629 | struct lttng_payload_view *view, | |
630 | struct lttng_condition **_condition) | |
631 | { | |
38114013 PP |
632 | ssize_t consumed_length; |
633 | size_t offset = 0; | |
634 | ssize_t event_rule_length; | |
635 | uint32_t i, capture_descr_count; | |
683d081a JR |
636 | struct lttng_condition *condition = NULL; |
637 | struct lttng_event_rule *event_rule = NULL; | |
683d081a JR |
638 | |
639 | if (!view || !_condition) { | |
640 | goto error; | |
641 | } | |
642 | ||
38114013 | 643 | /* Struct lttng_event_rule. */ |
683d081a JR |
644 | { |
645 | struct lttng_payload_view event_rule_view = | |
646 | lttng_payload_view_from_view(view, offset, -1); | |
647 | ||
648 | event_rule_length = lttng_event_rule_create_from_payload( | |
649 | &event_rule_view, &event_rule); | |
650 | } | |
651 | ||
652 | if (event_rule_length < 0 || !event_rule) { | |
653 | goto error; | |
654 | } | |
655 | ||
38114013 PP |
656 | /* Create condition (no capture descriptors yet) at this point. */ |
657 | condition = lttng_condition_event_rule_create(event_rule); | |
658 | if (!condition) { | |
683d081a JR |
659 | goto error; |
660 | } | |
661 | ||
683d081a | 662 | |
38114013 PP |
663 | /* Capture descriptor count. */ |
664 | assert(event_rule_length >= 0); | |
665 | offset += (size_t) event_rule_length; | |
666 | capture_descr_count = uint_from_buffer(&view->buffer, sizeof(uint32_t), &offset); | |
667 | if (capture_descr_count == UINT32_C(-1)) { | |
683d081a JR |
668 | goto error; |
669 | } | |
670 | ||
38114013 PP |
671 | /* Capture descriptors. */ |
672 | for (i = 0; i < capture_descr_count; i++) { | |
6fb7c690 | 673 | enum lttng_condition_status status; |
38114013 PP |
674 | struct lttng_event_expr *expr = event_expr_from_payload( |
675 | view, &offset); | |
38114013 PP |
676 | |
677 | if (!expr) { | |
678 | goto error; | |
679 | } | |
680 | ||
681 | /* Move ownership of `expr` to `condition`. */ | |
682 | status = lttng_condition_event_rule_append_capture_descriptor( | |
683 | condition, expr); | |
684 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
685 | /* `expr` not moved: destroy it. */ | |
686 | lttng_event_expr_destroy(expr); | |
687 | goto error; | |
688 | } | |
689 | } | |
690 | ||
691 | consumed_length = (ssize_t) offset; | |
683d081a JR |
692 | *_condition = condition; |
693 | condition = NULL; | |
694 | goto end; | |
695 | ||
696 | error: | |
38114013 | 697 | consumed_length = -1; |
683d081a JR |
698 | |
699 | end: | |
700 | lttng_event_rule_put(event_rule); | |
701 | lttng_condition_put(condition); | |
38114013 | 702 | return consumed_length; |
683d081a JR |
703 | } |
704 | ||
705 | LTTNG_HIDDEN | |
706 | enum lttng_condition_status lttng_condition_event_rule_borrow_rule_mutable( | |
707 | const struct lttng_condition *condition, | |
708 | struct lttng_event_rule **rule) | |
709 | { | |
710 | struct lttng_condition_event_rule *event_rule; | |
711 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
712 | ||
713 | if (!condition || !IS_EVENT_RULE_CONDITION(condition) || !rule) { | |
714 | status = LTTNG_CONDITION_STATUS_INVALID; | |
715 | goto end; | |
716 | } | |
717 | ||
718 | event_rule = container_of( | |
719 | condition, struct lttng_condition_event_rule, parent); | |
720 | if (!event_rule->rule) { | |
721 | status = LTTNG_CONDITION_STATUS_UNSET; | |
722 | goto end; | |
723 | } | |
724 | ||
725 | *rule = event_rule->rule; | |
726 | end: | |
727 | return status; | |
728 | } | |
729 | ||
730 | enum lttng_condition_status lttng_condition_event_rule_get_rule( | |
731 | const struct lttng_condition *condition, | |
732 | const struct lttng_event_rule **rule) | |
733 | { | |
734 | struct lttng_event_rule *mutable_rule = NULL; | |
735 | const enum lttng_condition_status status = | |
736 | lttng_condition_event_rule_borrow_rule_mutable( | |
737 | condition, &mutable_rule); | |
738 | ||
739 | *rule = mutable_rule; | |
740 | return status; | |
741 | } | |
742 | ||
38114013 PP |
743 | enum lttng_condition_status |
744 | lttng_condition_event_rule_append_capture_descriptor( | |
745 | struct lttng_condition *condition, | |
746 | struct lttng_event_expr *expr) | |
747 | { | |
748 | int ret; | |
749 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
750 | struct lttng_condition_event_rule *event_rule_cond = | |
751 | container_of(condition, | |
752 | struct lttng_condition_event_rule, parent); | |
0912b5ea | 753 | struct lttng_capture_descriptor *descriptor = NULL; |
81d566c9 | 754 | const struct lttng_event_rule *rule = NULL; |
38114013 PP |
755 | |
756 | /* Only accept l-values. */ | |
757 | if (!condition || !IS_EVENT_RULE_CONDITION(condition) || !expr || | |
758 | !lttng_event_expr_is_lvalue(expr)) { | |
759 | status = LTTNG_CONDITION_STATUS_INVALID; | |
81d566c9 JR |
760 | goto end; |
761 | } | |
762 | ||
763 | status = lttng_condition_event_rule_get_rule(condition, &rule); | |
764 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
765 | goto end; | |
766 | } | |
767 | ||
768 | switch(lttng_event_rule_get_type(rule)) { | |
769 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
770 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
771 | /* Supported. */ | |
772 | status = LTTNG_CONDITION_STATUS_OK; | |
773 | break; | |
774 | case LTTNG_EVENT_RULE_TYPE_UNKNOWN: | |
775 | status = LTTNG_CONDITION_STATUS_INVALID; | |
776 | break; | |
777 | default: | |
778 | status = LTTNG_CONDITION_STATUS_UNSUPPORTED; | |
779 | break; | |
780 | } | |
781 | ||
782 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
38114013 PP |
783 | goto end; |
784 | } | |
785 | ||
0912b5ea JR |
786 | descriptor = malloc(sizeof(*descriptor)); |
787 | if (descriptor == NULL) { | |
788 | status = LTTNG_CONDITION_STATUS_ERROR; | |
789 | goto end; | |
790 | } | |
791 | ||
792 | descriptor->event_expression = expr; | |
793 | descriptor->bytecode = NULL; | |
794 | ||
38114013 | 795 | ret = lttng_dynamic_pointer_array_add_pointer( |
0912b5ea | 796 | &event_rule_cond->capture_descriptors, descriptor); |
38114013 PP |
797 | if (ret) { |
798 | status = LTTNG_CONDITION_STATUS_ERROR; | |
799 | goto end; | |
800 | } | |
801 | ||
0912b5ea JR |
802 | /* Ownership is transfered to the internal capture_descriptors array */ |
803 | descriptor = NULL; | |
38114013 | 804 | end: |
0912b5ea | 805 | free(descriptor); |
38114013 PP |
806 | return status; |
807 | } | |
808 | ||
809 | enum lttng_condition_status | |
810 | lttng_condition_event_rule_get_capture_descriptor_count( | |
811 | const struct lttng_condition *condition, unsigned int *count) | |
812 | { | |
813 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
814 | const struct lttng_condition_event_rule *event_rule_cond = | |
815 | container_of(condition, | |
816 | const struct lttng_condition_event_rule, | |
817 | parent); | |
818 | ||
819 | if (!condition || !IS_EVENT_RULE_CONDITION(condition) || !count) { | |
820 | status = LTTNG_CONDITION_STATUS_INVALID; | |
821 | goto end; | |
822 | } | |
823 | ||
824 | *count = lttng_dynamic_pointer_array_get_count( | |
825 | &event_rule_cond->capture_descriptors); | |
826 | ||
827 | end: | |
828 | return status; | |
829 | } | |
830 | ||
831 | const struct lttng_event_expr * | |
832 | lttng_condition_event_rule_get_capture_descriptor_at_index( | |
833 | const struct lttng_condition *condition, unsigned int index) | |
834 | { | |
38114013 | 835 | const struct lttng_event_expr *expr = NULL; |
6fb7c690 | 836 | const struct lttng_capture_descriptor *desc = NULL; |
0912b5ea | 837 | |
6fb7c690 JR |
838 | desc = lttng_condition_event_rule_get_internal_capture_descriptor_at_index( |
839 | condition, index); | |
840 | if (desc == NULL) { | |
38114013 PP |
841 | goto end; |
842 | } | |
0912b5ea | 843 | expr = desc->event_expression; |
38114013 PP |
844 | |
845 | end: | |
846 | return expr; | |
847 | } | |
848 | ||
683d081a JR |
849 | LTTNG_HIDDEN |
850 | ssize_t lttng_evaluation_event_rule_create_from_payload( | |
7c920b63 | 851 | const struct lttng_condition_event_rule *condition, |
683d081a JR |
852 | struct lttng_payload_view *view, |
853 | struct lttng_evaluation **_evaluation) | |
854 | { | |
855 | ssize_t ret, offset = 0; | |
856 | const char *trigger_name; | |
857 | struct lttng_evaluation *evaluation = NULL; | |
858 | const struct lttng_evaluation_event_rule_comm *header; | |
859 | const struct lttng_payload_view header_view = | |
860 | lttng_payload_view_from_view( | |
861 | view, 0, sizeof(*header)); | |
7c920b63 PP |
862 | uint32_t capture_payload_size; |
863 | const char *capture_payload = NULL; | |
683d081a JR |
864 | |
865 | if (!_evaluation) { | |
866 | ret = -1; | |
867 | goto error; | |
868 | } | |
869 | ||
870 | if (!lttng_payload_view_is_valid(&header_view)) { | |
871 | ERR("Failed to initialize from malformed event rule evaluation: buffer too short to contain header"); | |
872 | ret = -1; | |
873 | goto error; | |
874 | } | |
875 | ||
876 | header = (typeof(header)) header_view.buffer.data; | |
877 | ||
878 | /* Map the originating trigger's name. */ | |
879 | offset += sizeof(*header); | |
880 | { | |
7c920b63 | 881 | const struct lttng_payload_view current_view = |
683d081a JR |
882 | lttng_payload_view_from_view(view, offset, |
883 | header->trigger_name_length); | |
884 | ||
885 | if (!lttng_payload_view_is_valid(¤t_view)) { | |
886 | ERR("Failed to initialize from malformed event rule evaluation: buffer too short to contain trigger name"); | |
887 | ret = -1; | |
888 | goto error; | |
889 | } | |
890 | ||
891 | trigger_name = current_view.buffer.data; | |
892 | if (!lttng_buffer_view_contains_string(¤t_view.buffer, | |
893 | trigger_name, header->trigger_name_length)) { | |
894 | ERR("Failed to initialize from malformed event rule evaluation: invalid trigger name"); | |
895 | ret = -1; | |
896 | goto error; | |
897 | } | |
898 | } | |
899 | ||
900 | offset += header->trigger_name_length; | |
7c920b63 PP |
901 | { |
902 | const struct lttng_payload_view current_view = | |
903 | lttng_payload_view_from_view(view, offset, -1); | |
904 | ||
905 | if (current_view.buffer.size < sizeof(capture_payload_size)) { | |
906 | ret = -1; | |
907 | goto error; | |
908 | } | |
683d081a | 909 | |
7c920b63 PP |
910 | memcpy(&capture_payload_size, current_view.buffer.data, |
911 | sizeof(capture_payload_size)); | |
912 | } | |
913 | offset += sizeof(capture_payload_size); | |
914 | ||
915 | if (capture_payload_size > 0) { | |
916 | const struct lttng_payload_view current_view = | |
917 | lttng_payload_view_from_view(view, offset, -1); | |
918 | ||
919 | if (current_view.buffer.size < capture_payload_size) { | |
920 | ret = -1; | |
921 | goto error; | |
922 | } | |
923 | ||
924 | capture_payload = current_view.buffer.data; | |
925 | } | |
926 | ||
927 | evaluation = lttng_evaluation_event_rule_create(condition, trigger_name, | |
928 | capture_payload, capture_payload_size, true); | |
683d081a JR |
929 | if (!evaluation) { |
930 | ret = -1; | |
931 | goto error; | |
932 | } | |
933 | ||
7c920b63 | 934 | offset += capture_payload_size; |
683d081a JR |
935 | *_evaluation = evaluation; |
936 | evaluation = NULL; | |
937 | ret = offset; | |
938 | ||
939 | error: | |
940 | lttng_evaluation_destroy(evaluation); | |
941 | return ret; | |
942 | } | |
943 | ||
944 | static int lttng_evaluation_event_rule_serialize( | |
945 | const struct lttng_evaluation *evaluation, | |
946 | struct lttng_payload *payload) | |
947 | { | |
948 | int ret = 0; | |
949 | struct lttng_evaluation_event_rule *hit; | |
950 | struct lttng_evaluation_event_rule_comm comm; | |
7c920b63 | 951 | uint32_t capture_payload_size; |
683d081a JR |
952 | |
953 | hit = container_of( | |
954 | evaluation, struct lttng_evaluation_event_rule, parent); | |
955 | ||
956 | assert(hit->name); | |
957 | comm.trigger_name_length = strlen(hit->name) + 1; | |
958 | ||
959 | ret = lttng_dynamic_buffer_append( | |
960 | &payload->buffer, &comm, sizeof(comm)); | |
961 | if (ret) { | |
962 | goto end; | |
963 | } | |
964 | ||
965 | ret = lttng_dynamic_buffer_append( | |
966 | &payload->buffer, hit->name, comm.trigger_name_length); | |
7c920b63 PP |
967 | if (ret) { |
968 | goto end; | |
969 | } | |
970 | ||
971 | capture_payload_size = (uint32_t) hit->capture_payload.size; | |
972 | ret = lttng_dynamic_buffer_append(&payload->buffer, &capture_payload_size, | |
973 | sizeof(capture_payload_size)); | |
974 | if (ret) { | |
975 | goto end; | |
976 | } | |
977 | ||
978 | ret = lttng_dynamic_buffer_append(&payload->buffer, hit->capture_payload.data, | |
979 | hit->capture_payload.size); | |
980 | if (ret) { | |
981 | goto end; | |
982 | } | |
983 | ||
984 | end: | |
985 | return ret; | |
986 | } | |
987 | ||
988 | static | |
989 | bool msgpack_str_is_equal(const struct msgpack_object *obj, const char *str) | |
990 | { | |
991 | bool is_equal = true; | |
992 | ||
993 | assert(obj->type == MSGPACK_OBJECT_STR); | |
994 | ||
995 | if (obj->via.str.size != strlen(str)) { | |
996 | is_equal = false; | |
997 | goto end; | |
998 | } | |
999 | ||
1000 | if (strncmp(obj->via.str.ptr, str, obj->via.str.size) != 0) { | |
1001 | is_equal = false; | |
1002 | goto end; | |
1003 | } | |
1004 | ||
1005 | end: | |
1006 | return is_equal; | |
1007 | } | |
1008 | ||
1009 | static | |
1010 | const msgpack_object *get_msgpack_map_obj(const struct msgpack_object *map_obj, | |
1011 | const char *name) | |
1012 | { | |
1013 | const msgpack_object *ret = NULL; | |
1014 | size_t i; | |
1015 | ||
1016 | assert(map_obj->type == MSGPACK_OBJECT_MAP); | |
1017 | ||
1018 | for (i = 0; i < map_obj->via.map.size; i++) { | |
1019 | const struct msgpack_object_kv *kv = &map_obj->via.map.ptr[i]; | |
1020 | ||
1021 | assert(kv->key.type == MSGPACK_OBJECT_STR); | |
1022 | ||
1023 | if (msgpack_str_is_equal(&kv->key, name)) { | |
1024 | ret = &kv->val; | |
1025 | goto end; | |
1026 | } | |
1027 | } | |
1028 | ||
683d081a JR |
1029 | end: |
1030 | return ret; | |
1031 | } | |
1032 | ||
1033 | static void lttng_evaluation_event_rule_destroy( | |
1034 | struct lttng_evaluation *evaluation) | |
1035 | { | |
1036 | struct lttng_evaluation_event_rule *hit; | |
1037 | ||
1038 | hit = container_of( | |
1039 | evaluation, struct lttng_evaluation_event_rule, parent); | |
1040 | free(hit->name); | |
7c920b63 PP |
1041 | lttng_dynamic_buffer_reset(&hit->capture_payload); |
1042 | lttng_event_field_value_destroy(hit->captured_values); | |
683d081a JR |
1043 | free(hit); |
1044 | } | |
1045 | ||
7c920b63 PP |
1046 | static |
1047 | int event_field_value_from_obj(const msgpack_object *obj, | |
1048 | struct lttng_event_field_value **field_val) | |
1049 | { | |
1050 | int ret = 0; | |
1051 | ||
1052 | assert(obj); | |
1053 | assert(field_val); | |
1054 | ||
1055 | switch (obj->type) { | |
1056 | case MSGPACK_OBJECT_NIL: | |
1057 | /* Unavailable. */ | |
1058 | *field_val = NULL; | |
1059 | goto end; | |
1060 | case MSGPACK_OBJECT_POSITIVE_INTEGER: | |
1061 | *field_val = lttng_event_field_value_uint_create( | |
1062 | obj->via.u64); | |
1063 | break; | |
1064 | case MSGPACK_OBJECT_NEGATIVE_INTEGER: | |
1065 | *field_val = lttng_event_field_value_int_create( | |
1066 | obj->via.i64); | |
1067 | break; | |
1068 | case MSGPACK_OBJECT_FLOAT32: | |
1069 | case MSGPACK_OBJECT_FLOAT64: | |
1070 | *field_val = lttng_event_field_value_real_create( | |
1071 | obj->via.f64); | |
1072 | break; | |
1073 | case MSGPACK_OBJECT_STR: | |
1074 | *field_val = lttng_event_field_value_string_create_with_size( | |
1075 | obj->via.str.ptr, obj->via.str.size); | |
1076 | break; | |
1077 | case MSGPACK_OBJECT_ARRAY: | |
1078 | { | |
1079 | size_t i; | |
1080 | ||
1081 | *field_val = lttng_event_field_value_array_create(); | |
1082 | if (!*field_val) { | |
1083 | goto error; | |
1084 | } | |
1085 | ||
1086 | for (i = 0; i < obj->via.array.size; i++) { | |
1087 | const msgpack_object *elem_obj = &obj->via.array.ptr[i]; | |
1088 | struct lttng_event_field_value *elem_field_val; | |
1089 | ||
1090 | ret = event_field_value_from_obj(elem_obj, | |
1091 | &elem_field_val); | |
1092 | if (ret) { | |
1093 | goto error; | |
1094 | } | |
1095 | ||
1096 | if (elem_field_val) { | |
1097 | ret = lttng_event_field_value_array_append( | |
1098 | *field_val, elem_field_val); | |
1099 | } else { | |
1100 | ret = lttng_event_field_value_array_append_unavailable( | |
1101 | *field_val); | |
1102 | } | |
1103 | ||
1104 | if (ret) { | |
1105 | lttng_event_field_value_destroy(elem_field_val); | |
1106 | goto error; | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | break; | |
1111 | } | |
1112 | case MSGPACK_OBJECT_MAP: | |
1113 | { | |
1114 | /* | |
1115 | * As of this version, the only valid map object is | |
1116 | * for an enumeration value, for example: | |
1117 | * | |
1118 | * type: enum | |
1119 | * value: 177 | |
1120 | * labels: | |
1121 | * - Labatt 50 | |
1122 | * - Molson Dry | |
1123 | * - Carling Black Label | |
1124 | */ | |
1125 | const msgpack_object *inner_obj; | |
1126 | size_t label_i; | |
1127 | ||
1128 | inner_obj = get_msgpack_map_obj(obj, "type"); | |
1129 | if (!inner_obj) { | |
1130 | ERR("Missing `type` entry in map object"); | |
1131 | goto error; | |
1132 | } | |
1133 | ||
1134 | if (inner_obj->type != MSGPACK_OBJECT_STR) { | |
1135 | ERR("Map object's `type` entry is not a string: type = %s", | |
1136 | msgpack_object_type_str(inner_obj->type)); | |
1137 | goto error; | |
1138 | } | |
1139 | ||
1140 | if (!msgpack_str_is_equal(inner_obj, "enum")) { | |
1141 | ERR("Map object's `type` entry: expecting `enum`"); | |
1142 | goto error; | |
1143 | } | |
1144 | ||
1145 | inner_obj = get_msgpack_map_obj(obj, "value"); | |
1146 | if (!inner_obj) { | |
1147 | ERR("Missing `value` entry in map object"); | |
1148 | goto error; | |
1149 | } | |
1150 | ||
1151 | if (inner_obj->type == MSGPACK_OBJECT_POSITIVE_INTEGER) { | |
1152 | *field_val = lttng_event_field_value_enum_uint_create( | |
1153 | inner_obj->via.u64); | |
1154 | } else if (inner_obj->type == MSGPACK_OBJECT_NEGATIVE_INTEGER) { | |
1155 | *field_val = lttng_event_field_value_enum_int_create( | |
1156 | inner_obj->via.i64); | |
1157 | } else { | |
1158 | ERR("Map object's `value` entry is not an integer: type = %s", | |
1159 | msgpack_object_type_str(inner_obj->type)); | |
1160 | goto error; | |
1161 | } | |
1162 | ||
1163 | if (!*field_val) { | |
1164 | goto error; | |
1165 | } | |
1166 | ||
1167 | inner_obj = get_msgpack_map_obj(obj, "labels"); | |
1168 | if (!inner_obj) { | |
1169 | /* No labels */ | |
1170 | goto end; | |
1171 | } | |
1172 | ||
1173 | if (inner_obj->type != MSGPACK_OBJECT_ARRAY) { | |
1174 | ERR("Map object's `labels` entry is not an array: type = %s", | |
1175 | msgpack_object_type_str(inner_obj->type)); | |
1176 | goto error; | |
1177 | } | |
1178 | ||
1179 | for (label_i = 0; label_i < inner_obj->via.array.size; | |
1180 | label_i++) { | |
1181 | int iret; | |
1182 | const msgpack_object *elem_obj = | |
1183 | &inner_obj->via.array.ptr[label_i]; | |
1184 | ||
1185 | if (elem_obj->type != MSGPACK_OBJECT_STR) { | |
1186 | ERR("Map object's `labels` entry's type is not a string: type = %s", | |
1187 | msgpack_object_type_str(elem_obj->type)); | |
1188 | goto error; | |
1189 | } | |
1190 | ||
1191 | iret = lttng_event_field_value_enum_append_label_with_size( | |
1192 | *field_val, elem_obj->via.str.ptr, | |
1193 | elem_obj->via.str.size); | |
1194 | if (iret) { | |
1195 | goto error; | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | break; | |
1200 | } | |
1201 | default: | |
1202 | ERR("Unexpected object type: type = %s", | |
1203 | msgpack_object_type_str(obj->type)); | |
1204 | goto error; | |
1205 | } | |
1206 | ||
1207 | if (!*field_val) { | |
1208 | goto error; | |
1209 | } | |
1210 | ||
1211 | goto end; | |
1212 | ||
1213 | error: | |
1214 | lttng_event_field_value_destroy(*field_val); | |
1215 | *field_val = NULL; | |
1216 | ret = -1; | |
1217 | ||
1218 | end: | |
1219 | return ret; | |
1220 | } | |
1221 | ||
1222 | static | |
1223 | struct lttng_event_field_value *event_field_value_from_capture_payload( | |
1224 | const struct lttng_condition_event_rule *condition, | |
1225 | const char *capture_payload, size_t capture_payload_size) | |
1226 | { | |
1227 | struct lttng_event_field_value *ret = NULL; | |
1228 | msgpack_unpacked unpacked; | |
1229 | msgpack_unpack_return unpack_return; | |
1230 | const msgpack_object *root_obj; | |
1231 | const msgpack_object_array *root_array_obj; | |
1232 | size_t i; | |
1233 | size_t count; | |
1234 | ||
1235 | assert(condition); | |
1236 | assert(capture_payload); | |
1237 | ||
1238 | /* Initialize value. */ | |
1239 | msgpack_unpacked_init(&unpacked); | |
1240 | ||
1241 | /* Decode. */ | |
1242 | unpack_return = msgpack_unpack_next(&unpacked, capture_payload, | |
1243 | capture_payload_size, NULL); | |
1244 | if (unpack_return != MSGPACK_UNPACK_SUCCESS) { | |
1245 | ERR("msgpack_unpack_next() failed to decode the " | |
1246 | "MessagePack-encoded capture payload: " | |
1247 | "size = %zu, ret = %d", | |
1248 | capture_payload_size, unpack_return); | |
1249 | goto error; | |
1250 | } | |
1251 | ||
1252 | /* Get root array. */ | |
1253 | root_obj = &unpacked.data; | |
1254 | ||
1255 | if (root_obj->type != MSGPACK_OBJECT_ARRAY) { | |
1256 | ERR("Expecting an array as the root object: type = %s", | |
1257 | msgpack_object_type_str(root_obj->type)); | |
1258 | goto error; | |
1259 | } | |
1260 | ||
1261 | root_array_obj = &root_obj->via.array; | |
1262 | ||
1263 | /* Create an empty root array event field value. */ | |
1264 | ret = lttng_event_field_value_array_create(); | |
1265 | if (!ret) { | |
1266 | goto error; | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * For each capture descriptor in the condition object: | |
1271 | * | |
1272 | * 1. Get its corresponding captured field value MessagePack | |
1273 | * object. | |
1274 | * | |
1275 | * 2. Create a corresponding event field value. | |
1276 | * | |
1277 | * 3. Append it to `ret` (the root array event field value). | |
1278 | */ | |
1279 | count = lttng_dynamic_pointer_array_get_count( | |
1280 | &condition->capture_descriptors); | |
1281 | assert(count > 0); | |
1282 | ||
1283 | for (i = 0; i < count; i++) { | |
1284 | const struct lttng_capture_descriptor *capture_descriptor = | |
1285 | lttng_condition_event_rule_get_internal_capture_descriptor_at_index( | |
1286 | &condition->parent, i); | |
1287 | const msgpack_object *elem_obj; | |
1288 | struct lttng_event_field_value *elem_field_val; | |
1289 | int iret; | |
1290 | ||
1291 | assert(capture_descriptor); | |
1292 | ||
1293 | elem_obj = &root_array_obj->ptr[i]; | |
1294 | iret = event_field_value_from_obj(elem_obj, | |
1295 | &elem_field_val); | |
1296 | if (iret) { | |
1297 | goto error; | |
1298 | } | |
1299 | ||
1300 | if (elem_field_val) { | |
1301 | iret = lttng_event_field_value_array_append(ret, | |
1302 | elem_field_val); | |
1303 | } else { | |
1304 | iret = lttng_event_field_value_array_append_unavailable( | |
1305 | ret); | |
1306 | } | |
1307 | ||
1308 | if (iret) { | |
1309 | lttng_event_field_value_destroy(elem_field_val); | |
1310 | goto error; | |
1311 | } | |
1312 | } | |
1313 | ||
1314 | goto end; | |
1315 | ||
1316 | error: | |
1317 | lttng_event_field_value_destroy(ret); | |
1318 | ret = NULL; | |
1319 | ||
1320 | end: | |
1321 | msgpack_unpacked_destroy(&unpacked); | |
1322 | return ret; | |
1323 | } | |
1324 | ||
683d081a JR |
1325 | LTTNG_HIDDEN |
1326 | struct lttng_evaluation *lttng_evaluation_event_rule_create( | |
7c920b63 PP |
1327 | const struct lttng_condition_event_rule *condition, |
1328 | const char *trigger_name, | |
1329 | const char *capture_payload, size_t capture_payload_size, | |
1330 | bool decode_capture_payload) | |
683d081a JR |
1331 | { |
1332 | struct lttng_evaluation_event_rule *hit; | |
1333 | struct lttng_evaluation *evaluation = NULL; | |
1334 | ||
1335 | hit = zmalloc(sizeof(struct lttng_evaluation_event_rule)); | |
1336 | if (!hit) { | |
7c920b63 | 1337 | goto error; |
683d081a JR |
1338 | } |
1339 | ||
1340 | hit->name = strdup(trigger_name); | |
1341 | if (!hit->name) { | |
7c920b63 PP |
1342 | goto error; |
1343 | } | |
1344 | ||
1345 | lttng_dynamic_buffer_init(&hit->capture_payload); | |
1346 | ||
1347 | if (capture_payload) { | |
1348 | const int ret = lttng_dynamic_buffer_append( | |
1349 | &hit->capture_payload, capture_payload, | |
1350 | capture_payload_size); | |
1351 | if (ret) { | |
1352 | ERR("Failed to initialize capture payload of event rule evaluation"); | |
1353 | goto error; | |
1354 | } | |
1355 | ||
1356 | if (decode_capture_payload) { | |
1357 | hit->captured_values = | |
1358 | event_field_value_from_capture_payload( | |
1359 | condition, | |
1360 | capture_payload, | |
1361 | capture_payload_size); | |
1362 | if (!hit->captured_values) { | |
1363 | ERR("Failed to decode the capture payload: size = %zu", | |
1364 | capture_payload_size); | |
1365 | goto error; | |
1366 | } | |
1367 | } | |
683d081a JR |
1368 | } |
1369 | ||
1370 | hit->parent.type = LTTNG_CONDITION_TYPE_EVENT_RULE_HIT; | |
1371 | hit->parent.serialize = lttng_evaluation_event_rule_serialize; | |
1372 | hit->parent.destroy = lttng_evaluation_event_rule_destroy; | |
1373 | ||
1374 | evaluation = &hit->parent; | |
1375 | hit = NULL; | |
1376 | ||
7c920b63 | 1377 | error: |
683d081a JR |
1378 | if (hit) { |
1379 | lttng_evaluation_event_rule_destroy(&hit->parent); | |
1380 | } | |
1381 | ||
1382 | return evaluation; | |
1383 | } | |
1384 | ||
7c920b63 PP |
1385 | enum lttng_evaluation_status lttng_evaluation_event_rule_get_captured_values( |
1386 | const struct lttng_evaluation *evaluation, | |
1387 | const struct lttng_event_field_value **field_val) | |
1388 | { | |
1389 | struct lttng_evaluation_event_rule *hit; | |
1390 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
1391 | ||
1392 | if (!evaluation || !is_event_rule_evaluation(evaluation) || | |
1393 | !field_val) { | |
1394 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
1395 | goto end; | |
1396 | } | |
1397 | ||
1398 | hit = container_of(evaluation, struct lttng_evaluation_event_rule, | |
1399 | parent); | |
1400 | if (!hit->captured_values) { | |
1401 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
1402 | goto end; | |
1403 | } | |
1404 | ||
1405 | *field_val = hit->captured_values; | |
1406 | ||
1407 | end: | |
1408 | return status; | |
1409 | } | |
1410 | ||
683d081a JR |
1411 | enum lttng_evaluation_status lttng_evaluation_event_rule_get_trigger_name( |
1412 | const struct lttng_evaluation *evaluation, const char **name) | |
1413 | { | |
1414 | struct lttng_evaluation_event_rule *hit; | |
1415 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; | |
1416 | ||
1417 | if (!evaluation || !is_event_rule_evaluation(evaluation) || !name) { | |
1418 | status = LTTNG_EVALUATION_STATUS_INVALID; | |
1419 | goto end; | |
1420 | } | |
1421 | ||
1422 | hit = container_of( | |
1423 | evaluation, struct lttng_evaluation_event_rule, parent); | |
1424 | *name = hit->name; | |
1425 | end: | |
1426 | return status; | |
1427 | } | |
834966af JR |
1428 | |
1429 | LTTNG_HIDDEN | |
1430 | enum lttng_error_code | |
1431 | lttng_condition_event_rule_generate_capture_descriptor_bytecode( | |
1432 | struct lttng_condition *condition) | |
1433 | { | |
1434 | enum lttng_error_code ret; | |
1435 | enum lttng_condition_status status; | |
1436 | unsigned int capture_count, i; | |
1437 | ||
1438 | if (!condition || !IS_EVENT_RULE_CONDITION(condition)) { | |
1439 | ret = LTTNG_ERR_FATAL; | |
1440 | goto end; | |
1441 | } | |
1442 | ||
1443 | status = lttng_condition_event_rule_get_capture_descriptor_count( | |
1444 | condition, &capture_count); | |
1445 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
1446 | ret = LTTNG_ERR_FATAL; | |
1447 | goto end; | |
1448 | } | |
1449 | ||
1450 | for (i = 0; i < capture_count; i++) { | |
1451 | struct lttng_capture_descriptor *local_capture_desc = | |
1452 | lttng_condition_event_rule_get_internal_capture_descriptor_at_index( | |
1453 | condition, i); | |
1454 | ||
1455 | if (local_capture_desc == NULL) { | |
1456 | ret = LTTNG_ERR_FATAL; | |
1457 | goto end; | |
1458 | } | |
1459 | ||
1460 | /* Generate the bytecode. */ | |
1461 | status = lttng_event_expr_to_bytecode( | |
1462 | local_capture_desc->event_expression, | |
1463 | &local_capture_desc->bytecode); | |
1464 | if (status < 0 || local_capture_desc->bytecode == NULL) { | |
1465 | ret = LTTNG_ERR_INVALID_CAPTURE_EXPRESSION; | |
1466 | goto end; | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | /* Everything went better than expected */ | |
1471 | ret = LTTNG_OK; | |
1472 | ||
1473 | end: | |
1474 | return ret; | |
1475 | } | |
51dbe985 JR |
1476 | |
1477 | LTTNG_HIDDEN | |
1478 | const struct lttng_bytecode * | |
1479 | lttng_condition_event_rule_get_capture_bytecode_at_index( | |
1480 | const struct lttng_condition *condition, unsigned int index) | |
1481 | { | |
1482 | const struct lttng_condition_event_rule *event_rule_cond = | |
1483 | container_of(condition, | |
1484 | const struct lttng_condition_event_rule, | |
1485 | parent); | |
1486 | struct lttng_capture_descriptor *desc = NULL; | |
1487 | struct lttng_bytecode *bytecode = NULL; | |
1488 | unsigned int count; | |
1489 | enum lttng_condition_status status; | |
1490 | ||
1491 | if (!condition || !IS_EVENT_RULE_CONDITION(condition)) { | |
1492 | goto end; | |
1493 | } | |
1494 | ||
1495 | status = lttng_condition_event_rule_get_capture_descriptor_count( | |
1496 | condition, &count); | |
1497 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
1498 | goto end; | |
1499 | } | |
1500 | ||
1501 | if (index >= count) { | |
1502 | goto end; | |
1503 | } | |
1504 | ||
1505 | desc = lttng_dynamic_pointer_array_get_pointer( | |
1506 | &event_rule_cond->capture_descriptors, index); | |
1507 | if (desc == NULL) { | |
1508 | goto end; | |
1509 | } | |
1510 | ||
1511 | bytecode = desc->bytecode; | |
1512 | end: | |
1513 | return bytecode; | |
1514 | } |