Commit | Line | Data |
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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> |
e393070a JR |
15 | #include <lttng/condition/on-event-internal.h> |
16 | #include <lttng/condition/on-event.h> | |
38114013 PP |
17 | #include <lttng/event-expr-internal.h> |
18 | #include <lttng/event-expr.h> | |
7c920b63 PP |
19 | #include <lttng/event-field-value-internal.h> |
20 | #include <lttng/event-rule/event-rule-internal.h> | |
834966af | 21 | #include <lttng/lttng-error.h> |
683d081a | 22 | #include <stdbool.h> |
38114013 | 23 | #include <stdint.h> |
116a02e3 | 24 | #include <vendor/msgpack/msgpack.h> |
683d081a | 25 | |
d602bd6a | 26 | #define IS_ON_EVENT_CONDITION(condition) \ |
683d081a | 27 | (lttng_condition_get_type(condition) == \ |
d602bd6a | 28 | LTTNG_CONDITION_TYPE_ON_EVENT) |
683d081a | 29 | |
d602bd6a | 30 | static bool is_on_event_evaluation(const struct lttng_evaluation *evaluation) |
683d081a JR |
31 | { |
32 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); | |
33 | ||
d602bd6a | 34 | return type == LTTNG_CONDITION_TYPE_ON_EVENT; |
683d081a JR |
35 | } |
36 | ||
d602bd6a | 37 | static bool lttng_condition_on_event_validate( |
683d081a | 38 | const struct lttng_condition *condition); |
d602bd6a | 39 | static int lttng_condition_on_event_serialize( |
683d081a JR |
40 | const struct lttng_condition *condition, |
41 | struct lttng_payload *payload); | |
d602bd6a | 42 | static bool lttng_condition_on_event_is_equal( |
683d081a JR |
43 | const struct lttng_condition *_a, |
44 | const struct lttng_condition *_b); | |
d602bd6a | 45 | static void lttng_condition_on_event_destroy( |
683d081a JR |
46 | struct lttng_condition *condition); |
47 | ||
d602bd6a | 48 | static bool lttng_condition_on_event_validate( |
683d081a JR |
49 | const struct lttng_condition *condition) |
50 | { | |
51 | bool valid = false; | |
d602bd6a | 52 | struct lttng_condition_on_event *event_rule; |
683d081a JR |
53 | |
54 | if (!condition) { | |
55 | goto end; | |
56 | } | |
57 | ||
58 | event_rule = container_of( | |
d602bd6a | 59 | condition, struct lttng_condition_on_event, parent); |
683d081a | 60 | if (!event_rule->rule) { |
d602bd6a | 61 | ERR("Invalid on event condition: a rule must be set"); |
683d081a JR |
62 | goto end; |
63 | } | |
64 | ||
65 | valid = lttng_event_rule_validate(event_rule->rule); | |
66 | end: | |
67 | return valid; | |
68 | } | |
69 | ||
7c920b63 PP |
70 | static const char *msgpack_object_type_str(msgpack_object_type type) |
71 | { | |
72 | const char *name; | |
73 | ||
74 | switch (type) { | |
75 | case MSGPACK_OBJECT_NIL: | |
76 | name = "MSGPACK_OBJECT_NIL"; | |
77 | break; | |
78 | case MSGPACK_OBJECT_BOOLEAN: | |
79 | name = "MSGPACK_OBJECT_BOOLEAN"; | |
80 | break; | |
81 | case MSGPACK_OBJECT_POSITIVE_INTEGER: | |
82 | name = "MSGPACK_OBJECT_POSITIVE_INTEGER"; | |
83 | break; | |
84 | case MSGPACK_OBJECT_NEGATIVE_INTEGER: | |
85 | name = "MSGPACK_OBJECT_NEGATIVE_INTEGER"; | |
86 | break; | |
87 | case MSGPACK_OBJECT_FLOAT32: | |
88 | name = "MSGPACK_OBJECT_FLOAT32"; | |
89 | break; | |
90 | case MSGPACK_OBJECT_FLOAT: | |
91 | /* Same value as MSGPACK_OBJECT_FLOAT64 */ | |
92 | name = "MSGPACK_OBJECT_FLOAT(64)"; | |
93 | break; | |
94 | case MSGPACK_OBJECT_STR: | |
95 | name = "MSGPACK_OBJECT_STR"; | |
96 | break; | |
97 | case MSGPACK_OBJECT_ARRAY: | |
98 | name = "MSGPACK_OBJECT_ARRAY"; | |
99 | break; | |
100 | case MSGPACK_OBJECT_MAP: | |
101 | name = "MSGPACK_OBJECT_MAP"; | |
102 | break; | |
103 | case MSGPACK_OBJECT_BIN: | |
104 | name = "MSGPACK_OBJECT_BIN"; | |
105 | break; | |
106 | case MSGPACK_OBJECT_EXT: | |
107 | name = "MSGPACK_OBJECT_EXT"; | |
108 | break; | |
109 | default: | |
110 | abort(); | |
111 | } | |
112 | ||
113 | return name; | |
114 | } | |
115 | ||
38114013 PP |
116 | /* |
117 | * Serializes the C string `str` into `buf`. | |
118 | * | |
119 | * Encoding is the length of `str` plus one (for the null character), | |
120 | * and then the string, including its null terminator. | |
121 | */ | |
122 | static | |
123 | int serialize_cstr(const char *str, struct lttng_dynamic_buffer *buf) | |
124 | { | |
125 | int ret; | |
126 | const uint32_t len = strlen(str) + 1; | |
127 | ||
128 | /* Serialize the length, including the null terminator. */ | |
129 | DBG("Serializing C string's length (including null terminator): " | |
130 | "%" PRIu32, len); | |
131 | ret = lttng_dynamic_buffer_append(buf, &len, sizeof(len)); | |
132 | if (ret) { | |
133 | goto end; | |
134 | } | |
135 | ||
136 | /* Serialize the string. */ | |
137 | DBG("Serializing C string: '%s'", str); | |
138 | ret = lttng_dynamic_buffer_append(buf, str, len); | |
139 | if (ret) { | |
140 | goto end; | |
141 | } | |
142 | ||
143 | end: | |
144 | return ret; | |
145 | } | |
146 | ||
147 | /* | |
148 | * Serializes the event expression `expr` into `buf`. | |
149 | */ | |
150 | static | |
151 | int serialize_event_expr(const struct lttng_event_expr *expr, | |
152 | struct lttng_payload *payload) | |
153 | { | |
154 | const uint8_t type = expr->type; | |
155 | int ret; | |
156 | ||
157 | /* Serialize the expression's type. */ | |
158 | DBG("Serializing event expression's type: %d", expr->type); | |
159 | ret = lttng_dynamic_buffer_append(&payload->buffer, &type, sizeof(type)); | |
160 | if (ret) { | |
161 | goto end; | |
162 | } | |
163 | ||
164 | /* Serialize the expression */ | |
165 | switch (expr->type) { | |
166 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
167 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
168 | { | |
169 | const struct lttng_event_expr_field *field_expr = | |
170 | container_of(expr, | |
171 | const struct lttng_event_expr_field, | |
172 | parent); | |
173 | ||
174 | /* Serialize the field name. */ | |
175 | DBG("Serializing field event expression's field name: '%s'", | |
176 | field_expr->name); | |
177 | ret = serialize_cstr(field_expr->name, &payload->buffer); | |
178 | if (ret) { | |
179 | goto end; | |
180 | } | |
181 | ||
182 | break; | |
183 | } | |
184 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
185 | { | |
186 | const struct lttng_event_expr_app_specific_context_field *field_expr = | |
187 | container_of(expr, | |
188 | const struct lttng_event_expr_app_specific_context_field, | |
189 | parent); | |
190 | ||
191 | /* Serialize the provider name. */ | |
192 | DBG("Serializing app-specific context field event expression's " | |
193 | "provider name: '%s'", | |
194 | field_expr->provider_name); | |
195 | ret = serialize_cstr(field_expr->provider_name, &payload->buffer); | |
196 | if (ret) { | |
197 | goto end; | |
198 | } | |
199 | ||
200 | /* Serialize the type name. */ | |
201 | DBG("Serializing app-specific context field event expression's " | |
202 | "type name: '%s'", | |
203 | field_expr->provider_name); | |
204 | ret = serialize_cstr(field_expr->type_name, &payload->buffer); | |
205 | if (ret) { | |
206 | goto end; | |
207 | } | |
208 | ||
209 | break; | |
210 | } | |
211 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
212 | { | |
213 | const struct lttng_event_expr_array_field_element *elem_expr = | |
214 | container_of(expr, | |
215 | const struct lttng_event_expr_array_field_element, | |
216 | parent); | |
217 | const uint32_t index = elem_expr->index; | |
218 | ||
219 | /* Serialize the index. */ | |
220 | DBG("Serializing array field element event expression's " | |
221 | "index: %u", elem_expr->index); | |
222 | ret = lttng_dynamic_buffer_append(&payload->buffer, &index, sizeof(index)); | |
223 | if (ret) { | |
224 | goto end; | |
225 | } | |
226 | ||
227 | /* Serialize the parent array field expression. */ | |
228 | DBG("Serializing array field element event expression's " | |
7c920b63 | 229 | "parent array field event expression"); |
38114013 PP |
230 | ret = serialize_event_expr(elem_expr->array_field_expr, payload); |
231 | if (ret) { | |
232 | goto end; | |
233 | } | |
234 | ||
235 | break; | |
236 | } | |
237 | default: | |
238 | break; | |
239 | } | |
240 | ||
241 | end: | |
242 | return ret; | |
243 | } | |
244 | ||
6fb7c690 JR |
245 | static |
246 | struct lttng_capture_descriptor * | |
d602bd6a | 247 | lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
6fb7c690 JR |
248 | const struct lttng_condition *condition, unsigned int index) |
249 | { | |
d602bd6a | 250 | const struct lttng_condition_on_event *on_event_cond = |
6fb7c690 | 251 | container_of(condition, |
d602bd6a | 252 | const struct lttng_condition_on_event, |
6fb7c690 JR |
253 | parent); |
254 | struct lttng_capture_descriptor *desc = NULL; | |
255 | unsigned int count; | |
256 | enum lttng_condition_status status; | |
257 | ||
d602bd6a | 258 | if (!condition || !IS_ON_EVENT_CONDITION(condition)) { |
6fb7c690 JR |
259 | goto end; |
260 | } | |
261 | ||
d602bd6a | 262 | status = lttng_condition_on_event_get_capture_descriptor_count( |
6fb7c690 JR |
263 | condition, &count); |
264 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
265 | goto end; | |
266 | } | |
267 | ||
268 | if (index >= count) { | |
269 | goto end; | |
270 | } | |
271 | ||
272 | desc = lttng_dynamic_pointer_array_get_pointer( | |
d602bd6a | 273 | &on_event_cond->capture_descriptors, index); |
6fb7c690 JR |
274 | end: |
275 | return desc; | |
276 | } | |
277 | ||
d602bd6a | 278 | static int lttng_condition_on_event_serialize( |
683d081a JR |
279 | const struct lttng_condition *condition, |
280 | struct lttng_payload *payload) | |
281 | { | |
282 | int ret; | |
d602bd6a | 283 | struct lttng_condition_on_event *on_event_condition; |
0912b5ea | 284 | enum lttng_condition_status status; |
38114013 PP |
285 | /* Used for iteration and communication (size matters). */ |
286 | uint32_t i, capture_descr_count; | |
683d081a | 287 | |
d602bd6a | 288 | if (!condition || !IS_ON_EVENT_CONDITION(condition)) { |
683d081a JR |
289 | ret = -1; |
290 | goto end; | |
291 | } | |
292 | ||
d602bd6a JR |
293 | DBG("Serializing on event condition"); |
294 | on_event_condition = container_of( | |
295 | condition, struct lttng_condition_on_event, parent); | |
683d081a | 296 | |
d602bd6a JR |
297 | DBG("Serializing on event condition's event rule"); |
298 | ret = lttng_event_rule_serialize(on_event_condition->rule, payload); | |
683d081a JR |
299 | if (ret) { |
300 | goto end; | |
301 | } | |
302 | ||
d602bd6a | 303 | status = lttng_condition_on_event_get_capture_descriptor_count( |
0912b5ea JR |
304 | condition, &capture_descr_count); |
305 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
306 | ret = -1; | |
307 | goto end; | |
308 | }; | |
309 | ||
d602bd6a | 310 | DBG("Serializing on event condition's capture descriptor count: %" PRIu32, |
38114013 PP |
311 | capture_descr_count); |
312 | ret = lttng_dynamic_buffer_append(&payload->buffer, &capture_descr_count, | |
313 | sizeof(capture_descr_count)); | |
683d081a JR |
314 | if (ret) { |
315 | goto end; | |
316 | } | |
317 | ||
38114013 | 318 | for (i = 0; i < capture_descr_count; i++) { |
6fb7c690 | 319 | const struct lttng_capture_descriptor *desc = |
d602bd6a | 320 | lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
0912b5ea | 321 | condition, i); |
38114013 | 322 | |
d602bd6a | 323 | DBG("Serializing on event condition's capture descriptor %" PRIu32, |
38114013 | 324 | i); |
6fb7c690 | 325 | ret = serialize_event_expr(desc->event_expression, payload); |
38114013 PP |
326 | if (ret) { |
327 | goto end; | |
328 | } | |
329 | } | |
683d081a JR |
330 | |
331 | end: | |
332 | return ret; | |
333 | } | |
334 | ||
38114013 PP |
335 | static |
336 | bool capture_descriptors_are_equal( | |
0912b5ea JR |
337 | const struct lttng_condition *condition_a, |
338 | const struct lttng_condition *condition_b) | |
38114013 PP |
339 | { |
340 | bool is_equal = true; | |
0912b5ea JR |
341 | unsigned int capture_descr_count_a; |
342 | unsigned int capture_descr_count_b; | |
38114013 | 343 | size_t i; |
0912b5ea | 344 | enum lttng_condition_status status; |
38114013 | 345 | |
d602bd6a | 346 | status = lttng_condition_on_event_get_capture_descriptor_count( |
0912b5ea JR |
347 | condition_a, &capture_descr_count_a); |
348 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
349 | goto not_equal; | |
350 | } | |
351 | ||
d602bd6a | 352 | status = lttng_condition_on_event_get_capture_descriptor_count( |
0912b5ea JR |
353 | condition_b, &capture_descr_count_b); |
354 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
355 | goto not_equal; | |
356 | } | |
38114013 PP |
357 | |
358 | if (capture_descr_count_a != capture_descr_count_b) { | |
359 | goto not_equal; | |
360 | } | |
361 | ||
362 | for (i = 0; i < capture_descr_count_a; i++) { | |
363 | const struct lttng_event_expr *expr_a = | |
d602bd6a | 364 | lttng_condition_on_event_get_capture_descriptor_at_index( |
0912b5ea | 365 | condition_a, |
38114013 PP |
366 | i); |
367 | const struct lttng_event_expr *expr_b = | |
d602bd6a | 368 | lttng_condition_on_event_get_capture_descriptor_at_index( |
0912b5ea | 369 | condition_b, |
38114013 PP |
370 | i); |
371 | ||
372 | if (!lttng_event_expr_is_equal(expr_a, expr_b)) { | |
373 | goto not_equal; | |
374 | } | |
375 | } | |
376 | ||
377 | goto end; | |
378 | ||
379 | not_equal: | |
380 | is_equal = false; | |
381 | ||
382 | end: | |
383 | return is_equal; | |
384 | } | |
385 | ||
d602bd6a | 386 | static bool lttng_condition_on_event_is_equal( |
683d081a JR |
387 | const struct lttng_condition *_a, |
388 | const struct lttng_condition *_b) | |
389 | { | |
390 | bool is_equal = false; | |
d602bd6a | 391 | struct lttng_condition_on_event *a, *b; |
683d081a | 392 | |
d602bd6a JR |
393 | a = container_of(_a, struct lttng_condition_on_event, parent); |
394 | b = container_of(_b, struct lttng_condition_on_event, parent); | |
683d081a JR |
395 | |
396 | /* Both event rules must be set or both must be unset. */ | |
397 | if ((a->rule && !b->rule) || (!a->rule && b->rule)) { | |
398 | WARN("Comparing event_rule conditions with uninitialized rule"); | |
399 | goto end; | |
400 | } | |
401 | ||
402 | is_equal = lttng_event_rule_is_equal(a->rule, b->rule); | |
38114013 PP |
403 | if (!is_equal) { |
404 | goto end; | |
405 | } | |
406 | ||
0912b5ea | 407 | is_equal = capture_descriptors_are_equal(_a, _b); |
38114013 | 408 | |
683d081a JR |
409 | end: |
410 | return is_equal; | |
411 | } | |
412 | ||
d602bd6a | 413 | static void lttng_condition_on_event_destroy( |
683d081a JR |
414 | struct lttng_condition *condition) |
415 | { | |
d602bd6a | 416 | struct lttng_condition_on_event *on_event_condition; |
683d081a | 417 | |
d602bd6a JR |
418 | on_event_condition = container_of( |
419 | condition, struct lttng_condition_on_event, parent); | |
683d081a | 420 | |
d602bd6a JR |
421 | lttng_event_rule_put(on_event_condition->rule); |
422 | lttng_dynamic_pointer_array_reset(&on_event_condition->capture_descriptors); | |
423 | free(on_event_condition); | |
683d081a JR |
424 | } |
425 | ||
38114013 | 426 | static |
0912b5ea | 427 | void destroy_capture_descriptor(void *ptr) |
38114013 | 428 | { |
0912b5ea JR |
429 | struct lttng_capture_descriptor *desc = |
430 | (struct lttng_capture_descriptor *) ptr; | |
431 | ||
432 | lttng_event_expr_destroy(desc->event_expression); | |
433 | free(desc->bytecode); | |
434 | free(desc); | |
38114013 PP |
435 | } |
436 | ||
d602bd6a | 437 | struct lttng_condition *lttng_condition_on_event_create( |
683d081a JR |
438 | struct lttng_event_rule *rule) |
439 | { | |
440 | struct lttng_condition *parent = NULL; | |
d602bd6a | 441 | struct lttng_condition_on_event *condition = NULL; |
683d081a JR |
442 | |
443 | if (!rule) { | |
444 | goto end; | |
445 | } | |
446 | ||
d602bd6a | 447 | condition = zmalloc(sizeof(struct lttng_condition_on_event)); |
683d081a JR |
448 | if (!condition) { |
449 | return NULL; | |
450 | } | |
451 | ||
452 | lttng_condition_init(&condition->parent, | |
d602bd6a JR |
453 | LTTNG_CONDITION_TYPE_ON_EVENT); |
454 | condition->parent.validate = lttng_condition_on_event_validate, | |
455 | condition->parent.serialize = lttng_condition_on_event_serialize, | |
456 | condition->parent.equal = lttng_condition_on_event_is_equal, | |
457 | condition->parent.destroy = lttng_condition_on_event_destroy, | |
683d081a JR |
458 | |
459 | lttng_event_rule_get(rule); | |
460 | condition->rule = rule; | |
461 | rule = NULL; | |
462 | ||
38114013 | 463 | lttng_dynamic_pointer_array_init(&condition->capture_descriptors, |
0912b5ea | 464 | destroy_capture_descriptor); |
38114013 | 465 | |
683d081a JR |
466 | parent = &condition->parent; |
467 | end: | |
468 | return parent; | |
469 | } | |
470 | ||
38114013 PP |
471 | static |
472 | uint64_t uint_from_buffer(const struct lttng_buffer_view *view, size_t size, | |
473 | size_t *offset) | |
474 | { | |
475 | uint64_t ret; | |
476 | const struct lttng_buffer_view uint_view = | |
477 | lttng_buffer_view_from_view(view, *offset, size); | |
478 | ||
479 | if (!lttng_buffer_view_is_valid(&uint_view)) { | |
480 | ret = UINT64_C(-1); | |
481 | goto end; | |
482 | } | |
483 | ||
484 | switch (size) { | |
485 | case 1: | |
486 | ret = (uint64_t) *uint_view.data; | |
487 | break; | |
488 | case sizeof(uint32_t): | |
489 | { | |
490 | uint32_t u32; | |
491 | ||
492 | memcpy(&u32, uint_view.data, sizeof(u32)); | |
493 | ret = (uint64_t) u32; | |
494 | break; | |
495 | } | |
496 | case sizeof(ret): | |
497 | memcpy(&ret, uint_view.data, sizeof(ret)); | |
498 | break; | |
499 | default: | |
500 | abort(); | |
501 | } | |
502 | ||
503 | *offset += size; | |
504 | ||
505 | end: | |
506 | return ret; | |
507 | } | |
508 | ||
509 | static | |
510 | const char *str_from_buffer(const struct lttng_buffer_view *view, | |
511 | size_t *offset) | |
512 | { | |
513 | uint64_t len; | |
514 | const char *ret; | |
515 | ||
516 | len = uint_from_buffer(view, sizeof(uint32_t), offset); | |
517 | if (len == UINT64_C(-1)) { | |
518 | goto error; | |
519 | } | |
520 | ||
521 | ret = &view->data[*offset]; | |
522 | ||
523 | if (!lttng_buffer_view_contains_string(view, ret, len)) { | |
524 | goto error; | |
525 | } | |
526 | ||
527 | *offset += len; | |
528 | goto end; | |
529 | ||
530 | error: | |
531 | ret = NULL; | |
532 | ||
533 | end: | |
534 | return ret; | |
535 | } | |
536 | ||
537 | static | |
538 | struct lttng_event_expr *event_expr_from_payload( | |
539 | struct lttng_payload_view *view, size_t *offset) | |
540 | { | |
541 | struct lttng_event_expr *expr = NULL; | |
542 | const char *str; | |
543 | uint64_t type; | |
544 | ||
545 | type = uint_from_buffer(&view->buffer, sizeof(uint8_t), offset); | |
546 | if (type == UINT64_C(-1)) { | |
547 | goto error; | |
548 | } | |
549 | ||
550 | switch (type) { | |
551 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
552 | str = str_from_buffer(&view->buffer, offset); | |
553 | if (!str) { | |
554 | goto error; | |
555 | } | |
556 | ||
557 | expr = lttng_event_expr_event_payload_field_create(str); | |
558 | break; | |
559 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
560 | str = str_from_buffer(&view->buffer, offset); | |
561 | if (!str) { | |
562 | goto error; | |
563 | } | |
564 | ||
565 | expr = lttng_event_expr_channel_context_field_create(str); | |
566 | break; | |
567 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
568 | { | |
569 | const char *provider_name; | |
570 | const char *type_name; | |
571 | ||
572 | provider_name = str_from_buffer(&view->buffer, offset); | |
573 | if (!provider_name) { | |
574 | goto error; | |
575 | } | |
576 | ||
577 | type_name = str_from_buffer(&view->buffer, offset); | |
578 | if (!type_name) { | |
579 | goto error; | |
580 | } | |
581 | ||
582 | expr = lttng_event_expr_app_specific_context_field_create( | |
583 | provider_name, type_name); | |
584 | break; | |
585 | } | |
586 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
587 | { | |
588 | struct lttng_event_expr *array_field_expr; | |
589 | const uint64_t index = uint_from_buffer( | |
590 | &view->buffer, sizeof(uint32_t), offset); | |
591 | ||
592 | if (index == UINT64_C(-1)) { | |
593 | goto error; | |
594 | } | |
595 | ||
596 | /* Array field expression is the encoded after this. */ | |
597 | array_field_expr = event_expr_from_payload(view, offset); | |
598 | if (!array_field_expr) { | |
599 | goto error; | |
600 | } | |
601 | ||
602 | /* Move ownership of `array_field_expr` to new expression. */ | |
603 | expr = lttng_event_expr_array_field_element_create( | |
604 | array_field_expr, (unsigned int) index); | |
605 | if (!expr) { | |
606 | /* `array_field_expr` not moved: destroy it. */ | |
607 | lttng_event_expr_destroy(array_field_expr); | |
608 | } | |
609 | ||
610 | break; | |
611 | } | |
612 | default: | |
52894180 JG |
613 | ERR("Invalid event expression type encoutered while deserializing event expression: type = %" PRIu64, |
614 | type); | |
615 | goto error; | |
38114013 PP |
616 | } |
617 | ||
618 | goto end; | |
619 | ||
620 | error: | |
621 | lttng_event_expr_destroy(expr); | |
622 | expr = NULL; | |
623 | ||
624 | end: | |
625 | return expr; | |
626 | } | |
627 | ||
683d081a | 628 | LTTNG_HIDDEN |
d602bd6a | 629 | ssize_t lttng_condition_on_event_create_from_payload( |
683d081a JR |
630 | struct lttng_payload_view *view, |
631 | struct lttng_condition **_condition) | |
632 | { | |
38114013 PP |
633 | ssize_t consumed_length; |
634 | size_t offset = 0; | |
635 | ssize_t event_rule_length; | |
636 | uint32_t i, capture_descr_count; | |
683d081a JR |
637 | struct lttng_condition *condition = NULL; |
638 | struct lttng_event_rule *event_rule = NULL; | |
683d081a JR |
639 | |
640 | if (!view || !_condition) { | |
641 | goto error; | |
642 | } | |
643 | ||
38114013 | 644 | /* Struct lttng_event_rule. */ |
683d081a JR |
645 | { |
646 | struct lttng_payload_view event_rule_view = | |
647 | lttng_payload_view_from_view(view, offset, -1); | |
648 | ||
649 | event_rule_length = lttng_event_rule_create_from_payload( | |
650 | &event_rule_view, &event_rule); | |
651 | } | |
652 | ||
653 | if (event_rule_length < 0 || !event_rule) { | |
654 | goto error; | |
655 | } | |
656 | ||
35a9ac41 FD |
657 | offset += event_rule_length; |
658 | ||
d602bd6a JR |
659 | /* Create condition (no capture descriptors yet) at this point */ |
660 | condition = lttng_condition_on_event_create(event_rule); | |
38114013 | 661 | if (!condition) { |
683d081a JR |
662 | goto error; |
663 | } | |
664 | ||
38114013 PP |
665 | /* Capture descriptor count. */ |
666 | assert(event_rule_length >= 0); | |
38114013 PP |
667 | capture_descr_count = uint_from_buffer(&view->buffer, sizeof(uint32_t), &offset); |
668 | if (capture_descr_count == UINT32_C(-1)) { | |
683d081a JR |
669 | goto error; |
670 | } | |
671 | ||
38114013 PP |
672 | /* Capture descriptors. */ |
673 | for (i = 0; i < capture_descr_count; i++) { | |
6fb7c690 | 674 | enum lttng_condition_status status; |
38114013 PP |
675 | struct lttng_event_expr *expr = event_expr_from_payload( |
676 | view, &offset); | |
38114013 PP |
677 | |
678 | if (!expr) { | |
679 | goto error; | |
680 | } | |
681 | ||
682 | /* Move ownership of `expr` to `condition`. */ | |
d602bd6a | 683 | status = lttng_condition_on_event_append_capture_descriptor( |
38114013 PP |
684 | condition, expr); |
685 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
686 | /* `expr` not moved: destroy it. */ | |
687 | lttng_event_expr_destroy(expr); | |
688 | goto error; | |
689 | } | |
690 | } | |
691 | ||
692 | consumed_length = (ssize_t) offset; | |
683d081a JR |
693 | *_condition = condition; |
694 | condition = NULL; | |
695 | goto end; | |
696 | ||
697 | error: | |
38114013 | 698 | consumed_length = -1; |
683d081a JR |
699 | |
700 | end: | |
701 | lttng_event_rule_put(event_rule); | |
702 | lttng_condition_put(condition); | |
38114013 | 703 | return consumed_length; |
683d081a JR |
704 | } |
705 | ||
706 | LTTNG_HIDDEN | |
d602bd6a | 707 | enum lttng_condition_status lttng_condition_on_event_borrow_rule_mutable( |
683d081a JR |
708 | const struct lttng_condition *condition, |
709 | struct lttng_event_rule **rule) | |
710 | { | |
d602bd6a | 711 | struct lttng_condition_on_event *event_rule; |
683d081a JR |
712 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
713 | ||
d602bd6a | 714 | if (!condition || !IS_ON_EVENT_CONDITION(condition) || !rule) { |
683d081a JR |
715 | status = LTTNG_CONDITION_STATUS_INVALID; |
716 | goto end; | |
717 | } | |
718 | ||
719 | event_rule = container_of( | |
d602bd6a | 720 | condition, struct lttng_condition_on_event, parent); |
683d081a JR |
721 | if (!event_rule->rule) { |
722 | status = LTTNG_CONDITION_STATUS_UNSET; | |
723 | goto end; | |
724 | } | |
725 | ||
726 | *rule = event_rule->rule; | |
727 | end: | |
728 | return status; | |
729 | } | |
730 | ||
d602bd6a | 731 | enum lttng_condition_status lttng_condition_on_event_get_rule( |
683d081a JR |
732 | const struct lttng_condition *condition, |
733 | const struct lttng_event_rule **rule) | |
734 | { | |
735 | struct lttng_event_rule *mutable_rule = NULL; | |
736 | const enum lttng_condition_status status = | |
d602bd6a | 737 | lttng_condition_on_event_borrow_rule_mutable( |
683d081a JR |
738 | condition, &mutable_rule); |
739 | ||
740 | *rule = mutable_rule; | |
741 | return status; | |
742 | } | |
743 | ||
35a9ac41 FD |
744 | LTTNG_HIDDEN |
745 | void lttng_condition_on_event_set_error_counter_index( | |
746 | struct lttng_condition *condition, uint64_t error_counter_index) | |
747 | { | |
748 | struct lttng_condition_on_event *on_event_cond = | |
749 | container_of(condition, | |
750 | struct lttng_condition_on_event, parent); | |
751 | ||
752 | LTTNG_OPTIONAL_SET(&on_event_cond->error_counter_index, error_counter_index); | |
753 | } | |
754 | ||
755 | LTTNG_HIDDEN | |
756 | uint64_t lttng_condition_on_event_get_error_counter_index( | |
757 | const struct lttng_condition *condition) | |
758 | { | |
759 | const struct lttng_condition_on_event *on_event_cond = | |
760 | container_of(condition, | |
761 | const struct lttng_condition_on_event, parent); | |
762 | ||
763 | return LTTNG_OPTIONAL_GET(on_event_cond->error_counter_index); | |
764 | } | |
765 | ||
38114013 | 766 | enum lttng_condition_status |
d602bd6a | 767 | lttng_condition_on_event_append_capture_descriptor( |
38114013 PP |
768 | struct lttng_condition *condition, |
769 | struct lttng_event_expr *expr) | |
770 | { | |
771 | int ret; | |
772 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
35a9ac41 | 773 | struct lttng_condition_on_event *on_event_cond = |
38114013 | 774 | container_of(condition, |
d602bd6a | 775 | struct lttng_condition_on_event, parent); |
0912b5ea | 776 | struct lttng_capture_descriptor *descriptor = NULL; |
81d566c9 | 777 | const struct lttng_event_rule *rule = NULL; |
38114013 PP |
778 | |
779 | /* Only accept l-values. */ | |
d602bd6a | 780 | if (!condition || !IS_ON_EVENT_CONDITION(condition) || !expr || |
38114013 PP |
781 | !lttng_event_expr_is_lvalue(expr)) { |
782 | status = LTTNG_CONDITION_STATUS_INVALID; | |
81d566c9 JR |
783 | goto end; |
784 | } | |
785 | ||
d602bd6a | 786 | status = lttng_condition_on_event_get_rule(condition, &rule); |
81d566c9 JR |
787 | if (status != LTTNG_CONDITION_STATUS_OK) { |
788 | goto end; | |
789 | } | |
790 | ||
791 | switch(lttng_event_rule_get_type(rule)) { | |
792 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
793 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
794 | /* Supported. */ | |
795 | status = LTTNG_CONDITION_STATUS_OK; | |
796 | break; | |
797 | case LTTNG_EVENT_RULE_TYPE_UNKNOWN: | |
798 | status = LTTNG_CONDITION_STATUS_INVALID; | |
799 | break; | |
800 | default: | |
801 | status = LTTNG_CONDITION_STATUS_UNSUPPORTED; | |
802 | break; | |
803 | } | |
804 | ||
805 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
38114013 PP |
806 | goto end; |
807 | } | |
808 | ||
0912b5ea JR |
809 | descriptor = malloc(sizeof(*descriptor)); |
810 | if (descriptor == NULL) { | |
811 | status = LTTNG_CONDITION_STATUS_ERROR; | |
812 | goto end; | |
813 | } | |
814 | ||
815 | descriptor->event_expression = expr; | |
816 | descriptor->bytecode = NULL; | |
817 | ||
38114013 | 818 | ret = lttng_dynamic_pointer_array_add_pointer( |
35a9ac41 | 819 | &on_event_cond->capture_descriptors, descriptor); |
38114013 PP |
820 | if (ret) { |
821 | status = LTTNG_CONDITION_STATUS_ERROR; | |
822 | goto end; | |
823 | } | |
824 | ||
0912b5ea JR |
825 | /* Ownership is transfered to the internal capture_descriptors array */ |
826 | descriptor = NULL; | |
38114013 | 827 | end: |
0912b5ea | 828 | free(descriptor); |
38114013 PP |
829 | return status; |
830 | } | |
831 | ||
832 | enum lttng_condition_status | |
d602bd6a | 833 | lttng_condition_on_event_get_capture_descriptor_count( |
38114013 PP |
834 | const struct lttng_condition *condition, unsigned int *count) |
835 | { | |
836 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
d602bd6a | 837 | const struct lttng_condition_on_event *on_event_condition = |
38114013 | 838 | container_of(condition, |
d602bd6a | 839 | const struct lttng_condition_on_event, |
38114013 PP |
840 | parent); |
841 | ||
d602bd6a | 842 | if (!condition || !IS_ON_EVENT_CONDITION(condition) || !count) { |
38114013 PP |
843 | status = LTTNG_CONDITION_STATUS_INVALID; |
844 | goto end; | |
845 | } | |
846 | ||
847 | *count = lttng_dynamic_pointer_array_get_count( | |
d602bd6a | 848 | &on_event_condition->capture_descriptors); |
38114013 PP |
849 | |
850 | end: | |
851 | return status; | |
852 | } | |
853 | ||
854 | const struct lttng_event_expr * | |
d602bd6a | 855 | lttng_condition_on_event_get_capture_descriptor_at_index( |
38114013 PP |
856 | const struct lttng_condition *condition, unsigned int index) |
857 | { | |
38114013 | 858 | const struct lttng_event_expr *expr = NULL; |
6fb7c690 | 859 | const struct lttng_capture_descriptor *desc = NULL; |
0912b5ea | 860 | |
d602bd6a | 861 | desc = lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
6fb7c690 JR |
862 | condition, index); |
863 | if (desc == NULL) { | |
38114013 PP |
864 | goto end; |
865 | } | |
0912b5ea | 866 | expr = desc->event_expression; |
38114013 PP |
867 | |
868 | end: | |
869 | return expr; | |
870 | } | |
871 | ||
683d081a | 872 | LTTNG_HIDDEN |
d602bd6a JR |
873 | ssize_t lttng_evaluation_on_event_create_from_payload( |
874 | const struct lttng_condition_on_event *condition, | |
683d081a JR |
875 | struct lttng_payload_view *view, |
876 | struct lttng_evaluation **_evaluation) | |
877 | { | |
878 | ssize_t ret, offset = 0; | |
683d081a | 879 | struct lttng_evaluation *evaluation = NULL; |
7c920b63 PP |
880 | uint32_t capture_payload_size; |
881 | const char *capture_payload = NULL; | |
683d081a JR |
882 | |
883 | if (!_evaluation) { | |
884 | ret = -1; | |
885 | goto error; | |
886 | } | |
887 | ||
7c920b63 PP |
888 | { |
889 | const struct lttng_payload_view current_view = | |
890 | lttng_payload_view_from_view(view, offset, -1); | |
891 | ||
892 | if (current_view.buffer.size < sizeof(capture_payload_size)) { | |
893 | ret = -1; | |
894 | goto error; | |
895 | } | |
683d081a | 896 | |
7c920b63 PP |
897 | memcpy(&capture_payload_size, current_view.buffer.data, |
898 | sizeof(capture_payload_size)); | |
899 | } | |
900 | offset += sizeof(capture_payload_size); | |
901 | ||
902 | if (capture_payload_size > 0) { | |
903 | const struct lttng_payload_view current_view = | |
904 | lttng_payload_view_from_view(view, offset, -1); | |
905 | ||
906 | if (current_view.buffer.size < capture_payload_size) { | |
907 | ret = -1; | |
908 | goto error; | |
909 | } | |
910 | ||
911 | capture_payload = current_view.buffer.data; | |
912 | } | |
913 | ||
65f64978 | 914 | evaluation = lttng_evaluation_on_event_create(condition, |
7c920b63 | 915 | capture_payload, capture_payload_size, true); |
683d081a JR |
916 | if (!evaluation) { |
917 | ret = -1; | |
918 | goto error; | |
919 | } | |
920 | ||
7c920b63 | 921 | offset += capture_payload_size; |
683d081a JR |
922 | *_evaluation = evaluation; |
923 | evaluation = NULL; | |
924 | ret = offset; | |
925 | ||
926 | error: | |
927 | lttng_evaluation_destroy(evaluation); | |
928 | return ret; | |
929 | } | |
930 | ||
d602bd6a | 931 | static int lttng_evaluation_on_event_serialize( |
683d081a JR |
932 | const struct lttng_evaluation *evaluation, |
933 | struct lttng_payload *payload) | |
934 | { | |
935 | int ret = 0; | |
d602bd6a | 936 | struct lttng_evaluation_on_event *hit; |
7c920b63 | 937 | uint32_t capture_payload_size; |
683d081a JR |
938 | |
939 | hit = container_of( | |
d602bd6a | 940 | evaluation, struct lttng_evaluation_on_event, parent); |
683d081a | 941 | |
7c920b63 PP |
942 | capture_payload_size = (uint32_t) hit->capture_payload.size; |
943 | ret = lttng_dynamic_buffer_append(&payload->buffer, &capture_payload_size, | |
944 | sizeof(capture_payload_size)); | |
945 | if (ret) { | |
946 | goto end; | |
947 | } | |
948 | ||
949 | ret = lttng_dynamic_buffer_append(&payload->buffer, hit->capture_payload.data, | |
950 | hit->capture_payload.size); | |
951 | if (ret) { | |
952 | goto end; | |
953 | } | |
954 | ||
955 | end: | |
956 | return ret; | |
957 | } | |
958 | ||
959 | static | |
960 | bool msgpack_str_is_equal(const struct msgpack_object *obj, const char *str) | |
961 | { | |
962 | bool is_equal = true; | |
963 | ||
964 | assert(obj->type == MSGPACK_OBJECT_STR); | |
965 | ||
966 | if (obj->via.str.size != strlen(str)) { | |
967 | is_equal = false; | |
968 | goto end; | |
969 | } | |
970 | ||
971 | if (strncmp(obj->via.str.ptr, str, obj->via.str.size) != 0) { | |
972 | is_equal = false; | |
973 | goto end; | |
974 | } | |
975 | ||
976 | end: | |
977 | return is_equal; | |
978 | } | |
979 | ||
980 | static | |
981 | const msgpack_object *get_msgpack_map_obj(const struct msgpack_object *map_obj, | |
982 | const char *name) | |
983 | { | |
984 | const msgpack_object *ret = NULL; | |
985 | size_t i; | |
986 | ||
987 | assert(map_obj->type == MSGPACK_OBJECT_MAP); | |
988 | ||
989 | for (i = 0; i < map_obj->via.map.size; i++) { | |
990 | const struct msgpack_object_kv *kv = &map_obj->via.map.ptr[i]; | |
991 | ||
992 | assert(kv->key.type == MSGPACK_OBJECT_STR); | |
993 | ||
994 | if (msgpack_str_is_equal(&kv->key, name)) { | |
995 | ret = &kv->val; | |
996 | goto end; | |
997 | } | |
998 | } | |
999 | ||
683d081a JR |
1000 | end: |
1001 | return ret; | |
1002 | } | |
1003 | ||
d602bd6a | 1004 | static void lttng_evaluation_on_event_destroy( |
683d081a JR |
1005 | struct lttng_evaluation *evaluation) |
1006 | { | |
d602bd6a | 1007 | struct lttng_evaluation_on_event *hit; |
683d081a JR |
1008 | |
1009 | hit = container_of( | |
d602bd6a | 1010 | evaluation, struct lttng_evaluation_on_event, parent); |
7c920b63 PP |
1011 | lttng_dynamic_buffer_reset(&hit->capture_payload); |
1012 | lttng_event_field_value_destroy(hit->captured_values); | |
683d081a JR |
1013 | free(hit); |
1014 | } | |
1015 | ||
7c920b63 PP |
1016 | static |
1017 | int event_field_value_from_obj(const msgpack_object *obj, | |
1018 | struct lttng_event_field_value **field_val) | |
1019 | { | |
1020 | int ret = 0; | |
1021 | ||
1022 | assert(obj); | |
1023 | assert(field_val); | |
1024 | ||
1025 | switch (obj->type) { | |
1026 | case MSGPACK_OBJECT_NIL: | |
1027 | /* Unavailable. */ | |
1028 | *field_val = NULL; | |
1029 | goto end; | |
1030 | case MSGPACK_OBJECT_POSITIVE_INTEGER: | |
1031 | *field_val = lttng_event_field_value_uint_create( | |
1032 | obj->via.u64); | |
1033 | break; | |
1034 | case MSGPACK_OBJECT_NEGATIVE_INTEGER: | |
1035 | *field_val = lttng_event_field_value_int_create( | |
1036 | obj->via.i64); | |
1037 | break; | |
1038 | case MSGPACK_OBJECT_FLOAT32: | |
1039 | case MSGPACK_OBJECT_FLOAT64: | |
1040 | *field_val = lttng_event_field_value_real_create( | |
1041 | obj->via.f64); | |
1042 | break; | |
1043 | case MSGPACK_OBJECT_STR: | |
1044 | *field_val = lttng_event_field_value_string_create_with_size( | |
1045 | obj->via.str.ptr, obj->via.str.size); | |
1046 | break; | |
1047 | case MSGPACK_OBJECT_ARRAY: | |
1048 | { | |
1049 | size_t i; | |
1050 | ||
1051 | *field_val = lttng_event_field_value_array_create(); | |
1052 | if (!*field_val) { | |
1053 | goto error; | |
1054 | } | |
1055 | ||
1056 | for (i = 0; i < obj->via.array.size; i++) { | |
1057 | const msgpack_object *elem_obj = &obj->via.array.ptr[i]; | |
1058 | struct lttng_event_field_value *elem_field_val; | |
1059 | ||
1060 | ret = event_field_value_from_obj(elem_obj, | |
1061 | &elem_field_val); | |
1062 | if (ret) { | |
1063 | goto error; | |
1064 | } | |
1065 | ||
1066 | if (elem_field_val) { | |
1067 | ret = lttng_event_field_value_array_append( | |
1068 | *field_val, elem_field_val); | |
1069 | } else { | |
1070 | ret = lttng_event_field_value_array_append_unavailable( | |
1071 | *field_val); | |
1072 | } | |
1073 | ||
1074 | if (ret) { | |
1075 | lttng_event_field_value_destroy(elem_field_val); | |
1076 | goto error; | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | break; | |
1081 | } | |
1082 | case MSGPACK_OBJECT_MAP: | |
1083 | { | |
1084 | /* | |
1085 | * As of this version, the only valid map object is | |
1086 | * for an enumeration value, for example: | |
1087 | * | |
1088 | * type: enum | |
1089 | * value: 177 | |
1090 | * labels: | |
1091 | * - Labatt 50 | |
1092 | * - Molson Dry | |
1093 | * - Carling Black Label | |
1094 | */ | |
1095 | const msgpack_object *inner_obj; | |
1096 | size_t label_i; | |
1097 | ||
1098 | inner_obj = get_msgpack_map_obj(obj, "type"); | |
1099 | if (!inner_obj) { | |
1100 | ERR("Missing `type` entry in map object"); | |
1101 | goto error; | |
1102 | } | |
1103 | ||
1104 | if (inner_obj->type != MSGPACK_OBJECT_STR) { | |
1105 | ERR("Map object's `type` entry is not a string: type = %s", | |
1106 | msgpack_object_type_str(inner_obj->type)); | |
1107 | goto error; | |
1108 | } | |
1109 | ||
1110 | if (!msgpack_str_is_equal(inner_obj, "enum")) { | |
1111 | ERR("Map object's `type` entry: expecting `enum`"); | |
1112 | goto error; | |
1113 | } | |
1114 | ||
1115 | inner_obj = get_msgpack_map_obj(obj, "value"); | |
1116 | if (!inner_obj) { | |
1117 | ERR("Missing `value` entry in map object"); | |
1118 | goto error; | |
1119 | } | |
1120 | ||
1121 | if (inner_obj->type == MSGPACK_OBJECT_POSITIVE_INTEGER) { | |
1122 | *field_val = lttng_event_field_value_enum_uint_create( | |
1123 | inner_obj->via.u64); | |
1124 | } else if (inner_obj->type == MSGPACK_OBJECT_NEGATIVE_INTEGER) { | |
1125 | *field_val = lttng_event_field_value_enum_int_create( | |
1126 | inner_obj->via.i64); | |
1127 | } else { | |
1128 | ERR("Map object's `value` entry is not an integer: type = %s", | |
1129 | msgpack_object_type_str(inner_obj->type)); | |
1130 | goto error; | |
1131 | } | |
1132 | ||
1133 | if (!*field_val) { | |
1134 | goto error; | |
1135 | } | |
1136 | ||
1137 | inner_obj = get_msgpack_map_obj(obj, "labels"); | |
1138 | if (!inner_obj) { | |
1139 | /* No labels */ | |
1140 | goto end; | |
1141 | } | |
1142 | ||
1143 | if (inner_obj->type != MSGPACK_OBJECT_ARRAY) { | |
1144 | ERR("Map object's `labels` entry is not an array: type = %s", | |
1145 | msgpack_object_type_str(inner_obj->type)); | |
1146 | goto error; | |
1147 | } | |
1148 | ||
1149 | for (label_i = 0; label_i < inner_obj->via.array.size; | |
1150 | label_i++) { | |
1151 | int iret; | |
1152 | const msgpack_object *elem_obj = | |
1153 | &inner_obj->via.array.ptr[label_i]; | |
1154 | ||
1155 | if (elem_obj->type != MSGPACK_OBJECT_STR) { | |
1156 | ERR("Map object's `labels` entry's type is not a string: type = %s", | |
1157 | msgpack_object_type_str(elem_obj->type)); | |
1158 | goto error; | |
1159 | } | |
1160 | ||
1161 | iret = lttng_event_field_value_enum_append_label_with_size( | |
1162 | *field_val, elem_obj->via.str.ptr, | |
1163 | elem_obj->via.str.size); | |
1164 | if (iret) { | |
1165 | goto error; | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | break; | |
1170 | } | |
1171 | default: | |
1172 | ERR("Unexpected object type: type = %s", | |
1173 | msgpack_object_type_str(obj->type)); | |
1174 | goto error; | |
1175 | } | |
1176 | ||
1177 | if (!*field_val) { | |
1178 | goto error; | |
1179 | } | |
1180 | ||
1181 | goto end; | |
1182 | ||
1183 | error: | |
1184 | lttng_event_field_value_destroy(*field_val); | |
1185 | *field_val = NULL; | |
1186 | ret = -1; | |
1187 | ||
1188 | end: | |
1189 | return ret; | |
1190 | } | |
1191 | ||
1192 | static | |
1193 | struct lttng_event_field_value *event_field_value_from_capture_payload( | |
d602bd6a | 1194 | const struct lttng_condition_on_event *condition, |
7c920b63 PP |
1195 | const char *capture_payload, size_t capture_payload_size) |
1196 | { | |
1197 | struct lttng_event_field_value *ret = NULL; | |
1198 | msgpack_unpacked unpacked; | |
1199 | msgpack_unpack_return unpack_return; | |
1200 | const msgpack_object *root_obj; | |
1201 | const msgpack_object_array *root_array_obj; | |
1202 | size_t i; | |
1203 | size_t count; | |
1204 | ||
1205 | assert(condition); | |
1206 | assert(capture_payload); | |
1207 | ||
1208 | /* Initialize value. */ | |
1209 | msgpack_unpacked_init(&unpacked); | |
1210 | ||
1211 | /* Decode. */ | |
1212 | unpack_return = msgpack_unpack_next(&unpacked, capture_payload, | |
1213 | capture_payload_size, NULL); | |
1214 | if (unpack_return != MSGPACK_UNPACK_SUCCESS) { | |
1215 | ERR("msgpack_unpack_next() failed to decode the " | |
1216 | "MessagePack-encoded capture payload: " | |
1217 | "size = %zu, ret = %d", | |
1218 | capture_payload_size, unpack_return); | |
1219 | goto error; | |
1220 | } | |
1221 | ||
1222 | /* Get root array. */ | |
1223 | root_obj = &unpacked.data; | |
1224 | ||
1225 | if (root_obj->type != MSGPACK_OBJECT_ARRAY) { | |
1226 | ERR("Expecting an array as the root object: type = %s", | |
1227 | msgpack_object_type_str(root_obj->type)); | |
1228 | goto error; | |
1229 | } | |
1230 | ||
1231 | root_array_obj = &root_obj->via.array; | |
1232 | ||
1233 | /* Create an empty root array event field value. */ | |
1234 | ret = lttng_event_field_value_array_create(); | |
1235 | if (!ret) { | |
1236 | goto error; | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * For each capture descriptor in the condition object: | |
1241 | * | |
1242 | * 1. Get its corresponding captured field value MessagePack | |
1243 | * object. | |
1244 | * | |
1245 | * 2. Create a corresponding event field value. | |
1246 | * | |
1247 | * 3. Append it to `ret` (the root array event field value). | |
1248 | */ | |
1249 | count = lttng_dynamic_pointer_array_get_count( | |
1250 | &condition->capture_descriptors); | |
1251 | assert(count > 0); | |
1252 | ||
1253 | for (i = 0; i < count; i++) { | |
1254 | const struct lttng_capture_descriptor *capture_descriptor = | |
d602bd6a | 1255 | lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
7c920b63 PP |
1256 | &condition->parent, i); |
1257 | const msgpack_object *elem_obj; | |
1258 | struct lttng_event_field_value *elem_field_val; | |
1259 | int iret; | |
1260 | ||
1261 | assert(capture_descriptor); | |
1262 | ||
1263 | elem_obj = &root_array_obj->ptr[i]; | |
1264 | iret = event_field_value_from_obj(elem_obj, | |
1265 | &elem_field_val); | |
1266 | if (iret) { | |
1267 | goto error; | |
1268 | } | |
1269 | ||
1270 | if (elem_field_val) { | |
1271 | iret = lttng_event_field_value_array_append(ret, | |
1272 | elem_field_val); | |
1273 | } else { | |
1274 | iret = lttng_event_field_value_array_append_unavailable( | |
1275 | ret); | |
1276 | } | |
1277 | ||
1278 | if (iret) { | |
1279 | lttng_event_field_value_destroy(elem_field_val); | |
1280 | goto error; | |
1281 | } | |
1282 | } | |
1283 | ||
1284 | goto end; | |
1285 | ||
1286 | error: | |
1287 | lttng_event_field_value_destroy(ret); | |
1288 | ret = NULL; | |
1289 | ||
1290 | end: | |
1291 | msgpack_unpacked_destroy(&unpacked); | |
1292 | return ret; | |
1293 | } | |
1294 | ||
683d081a | 1295 | LTTNG_HIDDEN |
d602bd6a JR |
1296 | struct lttng_evaluation *lttng_evaluation_on_event_create( |
1297 | const struct lttng_condition_on_event *condition, | |
7c920b63 PP |
1298 | const char *capture_payload, size_t capture_payload_size, |
1299 | bool decode_capture_payload) | |
683d081a | 1300 | { |
d602bd6a | 1301 | struct lttng_evaluation_on_event *hit; |
683d081a JR |
1302 | struct lttng_evaluation *evaluation = NULL; |
1303 | ||
d602bd6a | 1304 | hit = zmalloc(sizeof(struct lttng_evaluation_on_event)); |
683d081a | 1305 | if (!hit) { |
7c920b63 | 1306 | goto error; |
683d081a JR |
1307 | } |
1308 | ||
7c920b63 PP |
1309 | lttng_dynamic_buffer_init(&hit->capture_payload); |
1310 | ||
1311 | if (capture_payload) { | |
1312 | const int ret = lttng_dynamic_buffer_append( | |
1313 | &hit->capture_payload, capture_payload, | |
1314 | capture_payload_size); | |
1315 | if (ret) { | |
1316 | ERR("Failed to initialize capture payload of event rule evaluation"); | |
1317 | goto error; | |
1318 | } | |
1319 | ||
1320 | if (decode_capture_payload) { | |
1321 | hit->captured_values = | |
1322 | event_field_value_from_capture_payload( | |
1323 | condition, | |
1324 | capture_payload, | |
1325 | capture_payload_size); | |
1326 | if (!hit->captured_values) { | |
1327 | ERR("Failed to decode the capture payload: size = %zu", | |
1328 | capture_payload_size); | |
1329 | goto error; | |
1330 | } | |
1331 | } | |
683d081a JR |
1332 | } |
1333 | ||
d602bd6a JR |
1334 | hit->parent.type = LTTNG_CONDITION_TYPE_ON_EVENT; |
1335 | hit->parent.serialize = lttng_evaluation_on_event_serialize; | |
1336 | hit->parent.destroy = lttng_evaluation_on_event_destroy; | |
683d081a JR |
1337 | |
1338 | evaluation = &hit->parent; | |
1339 | hit = NULL; | |
1340 | ||
7c920b63 | 1341 | error: |
683d081a | 1342 | if (hit) { |
d602bd6a | 1343 | lttng_evaluation_on_event_destroy(&hit->parent); |
683d081a JR |
1344 | } |
1345 | ||
1346 | return evaluation; | |
1347 | } | |
1348 | ||
3ce811ee JG |
1349 | enum lttng_evaluation_on_event_status |
1350 | lttng_evaluation_on_event_get_captured_values( | |
7c920b63 PP |
1351 | const struct lttng_evaluation *evaluation, |
1352 | const struct lttng_event_field_value **field_val) | |
1353 | { | |
d602bd6a | 1354 | struct lttng_evaluation_on_event *hit; |
3ce811ee JG |
1355 | enum lttng_evaluation_on_event_status status = |
1356 | LTTNG_EVALUATION_ON_EVENT_STATUS_OK; | |
7c920b63 | 1357 | |
d602bd6a | 1358 | if (!evaluation || !is_on_event_evaluation(evaluation) || |
7c920b63 | 1359 | !field_val) { |
3ce811ee | 1360 | status = LTTNG_EVALUATION_ON_EVENT_STATUS_INVALID; |
7c920b63 PP |
1361 | goto end; |
1362 | } | |
1363 | ||
d602bd6a | 1364 | hit = container_of(evaluation, struct lttng_evaluation_on_event, |
7c920b63 PP |
1365 | parent); |
1366 | if (!hit->captured_values) { | |
3ce811ee | 1367 | status = LTTNG_EVALUATION_ON_EVENT_STATUS_NONE; |
7c920b63 PP |
1368 | goto end; |
1369 | } | |
1370 | ||
1371 | *field_val = hit->captured_values; | |
1372 | ||
1373 | end: | |
1374 | return status; | |
683d081a | 1375 | } |
834966af JR |
1376 | |
1377 | LTTNG_HIDDEN | |
1378 | enum lttng_error_code | |
d602bd6a | 1379 | lttng_condition_on_event_generate_capture_descriptor_bytecode( |
834966af JR |
1380 | struct lttng_condition *condition) |
1381 | { | |
1382 | enum lttng_error_code ret; | |
1383 | enum lttng_condition_status status; | |
1384 | unsigned int capture_count, i; | |
1385 | ||
d602bd6a | 1386 | if (!condition || !IS_ON_EVENT_CONDITION(condition)) { |
834966af JR |
1387 | ret = LTTNG_ERR_FATAL; |
1388 | goto end; | |
1389 | } | |
1390 | ||
d602bd6a | 1391 | status = lttng_condition_on_event_get_capture_descriptor_count( |
834966af JR |
1392 | condition, &capture_count); |
1393 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
1394 | ret = LTTNG_ERR_FATAL; | |
1395 | goto end; | |
1396 | } | |
1397 | ||
1398 | for (i = 0; i < capture_count; i++) { | |
1399 | struct lttng_capture_descriptor *local_capture_desc = | |
d602bd6a | 1400 | lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
834966af JR |
1401 | condition, i); |
1402 | ||
1403 | if (local_capture_desc == NULL) { | |
1404 | ret = LTTNG_ERR_FATAL; | |
1405 | goto end; | |
1406 | } | |
1407 | ||
1408 | /* Generate the bytecode. */ | |
1409 | status = lttng_event_expr_to_bytecode( | |
1410 | local_capture_desc->event_expression, | |
1411 | &local_capture_desc->bytecode); | |
1412 | if (status < 0 || local_capture_desc->bytecode == NULL) { | |
1413 | ret = LTTNG_ERR_INVALID_CAPTURE_EXPRESSION; | |
1414 | goto end; | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | /* Everything went better than expected */ | |
1419 | ret = LTTNG_OK; | |
1420 | ||
1421 | end: | |
1422 | return ret; | |
1423 | } | |
51dbe985 JR |
1424 | |
1425 | LTTNG_HIDDEN | |
1426 | const struct lttng_bytecode * | |
d602bd6a | 1427 | lttng_condition_on_event_get_capture_bytecode_at_index( |
51dbe985 JR |
1428 | const struct lttng_condition *condition, unsigned int index) |
1429 | { | |
35a9ac41 | 1430 | const struct lttng_condition_on_event *on_event_cond = |
51dbe985 | 1431 | container_of(condition, |
d602bd6a | 1432 | const struct lttng_condition_on_event, |
51dbe985 JR |
1433 | parent); |
1434 | struct lttng_capture_descriptor *desc = NULL; | |
1435 | struct lttng_bytecode *bytecode = NULL; | |
1436 | unsigned int count; | |
1437 | enum lttng_condition_status status; | |
1438 | ||
d602bd6a | 1439 | if (!condition || !IS_ON_EVENT_CONDITION(condition)) { |
51dbe985 JR |
1440 | goto end; |
1441 | } | |
1442 | ||
d602bd6a | 1443 | status = lttng_condition_on_event_get_capture_descriptor_count( |
51dbe985 JR |
1444 | condition, &count); |
1445 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
1446 | goto end; | |
1447 | } | |
1448 | ||
1449 | if (index >= count) { | |
1450 | goto end; | |
1451 | } | |
1452 | ||
1453 | desc = lttng_dynamic_pointer_array_get_pointer( | |
35a9ac41 | 1454 | &on_event_cond->capture_descriptors, index); |
51dbe985 JR |
1455 | if (desc == NULL) { |
1456 | goto end; | |
1457 | } | |
1458 | ||
1459 | bytecode = desc->bytecode; | |
1460 | end: | |
1461 | return bytecode; | |
1462 | } |