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 | |
35a9ac41 FD |
30 | typedef LTTNG_OPTIONAL(uint64_t) optional_uint64; |
31 | ||
d602bd6a | 32 | static bool is_on_event_evaluation(const struct lttng_evaluation *evaluation) |
683d081a JR |
33 | { |
34 | enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); | |
35 | ||
d602bd6a | 36 | return type == LTTNG_CONDITION_TYPE_ON_EVENT; |
683d081a JR |
37 | } |
38 | ||
d602bd6a | 39 | static bool lttng_condition_on_event_validate( |
683d081a | 40 | const struct lttng_condition *condition); |
d602bd6a | 41 | static int lttng_condition_on_event_serialize( |
683d081a JR |
42 | const struct lttng_condition *condition, |
43 | struct lttng_payload *payload); | |
d602bd6a | 44 | static bool lttng_condition_on_event_is_equal( |
683d081a JR |
45 | const struct lttng_condition *_a, |
46 | const struct lttng_condition *_b); | |
d602bd6a | 47 | static void lttng_condition_on_event_destroy( |
683d081a JR |
48 | struct lttng_condition *condition); |
49 | ||
d602bd6a | 50 | static bool lttng_condition_on_event_validate( |
683d081a JR |
51 | const struct lttng_condition *condition) |
52 | { | |
53 | bool valid = false; | |
d602bd6a | 54 | struct lttng_condition_on_event *event_rule; |
683d081a JR |
55 | |
56 | if (!condition) { | |
57 | goto end; | |
58 | } | |
59 | ||
60 | event_rule = container_of( | |
d602bd6a | 61 | condition, struct lttng_condition_on_event, parent); |
683d081a | 62 | if (!event_rule->rule) { |
d602bd6a | 63 | ERR("Invalid on event condition: a rule must be set"); |
683d081a JR |
64 | goto end; |
65 | } | |
66 | ||
67 | valid = lttng_event_rule_validate(event_rule->rule); | |
68 | end: | |
69 | return valid; | |
70 | } | |
71 | ||
7c920b63 PP |
72 | static const char *msgpack_object_type_str(msgpack_object_type type) |
73 | { | |
74 | const char *name; | |
75 | ||
76 | switch (type) { | |
77 | case MSGPACK_OBJECT_NIL: | |
78 | name = "MSGPACK_OBJECT_NIL"; | |
79 | break; | |
80 | case MSGPACK_OBJECT_BOOLEAN: | |
81 | name = "MSGPACK_OBJECT_BOOLEAN"; | |
82 | break; | |
83 | case MSGPACK_OBJECT_POSITIVE_INTEGER: | |
84 | name = "MSGPACK_OBJECT_POSITIVE_INTEGER"; | |
85 | break; | |
86 | case MSGPACK_OBJECT_NEGATIVE_INTEGER: | |
87 | name = "MSGPACK_OBJECT_NEGATIVE_INTEGER"; | |
88 | break; | |
89 | case MSGPACK_OBJECT_FLOAT32: | |
90 | name = "MSGPACK_OBJECT_FLOAT32"; | |
91 | break; | |
92 | case MSGPACK_OBJECT_FLOAT: | |
93 | /* Same value as MSGPACK_OBJECT_FLOAT64 */ | |
94 | name = "MSGPACK_OBJECT_FLOAT(64)"; | |
95 | break; | |
96 | case MSGPACK_OBJECT_STR: | |
97 | name = "MSGPACK_OBJECT_STR"; | |
98 | break; | |
99 | case MSGPACK_OBJECT_ARRAY: | |
100 | name = "MSGPACK_OBJECT_ARRAY"; | |
101 | break; | |
102 | case MSGPACK_OBJECT_MAP: | |
103 | name = "MSGPACK_OBJECT_MAP"; | |
104 | break; | |
105 | case MSGPACK_OBJECT_BIN: | |
106 | name = "MSGPACK_OBJECT_BIN"; | |
107 | break; | |
108 | case MSGPACK_OBJECT_EXT: | |
109 | name = "MSGPACK_OBJECT_EXT"; | |
110 | break; | |
111 | default: | |
112 | abort(); | |
113 | } | |
114 | ||
115 | return name; | |
116 | } | |
117 | ||
38114013 PP |
118 | /* |
119 | * Serializes the C string `str` into `buf`. | |
120 | * | |
121 | * Encoding is the length of `str` plus one (for the null character), | |
122 | * and then the string, including its null terminator. | |
123 | */ | |
124 | static | |
125 | int serialize_cstr(const char *str, struct lttng_dynamic_buffer *buf) | |
126 | { | |
127 | int ret; | |
128 | const uint32_t len = strlen(str) + 1; | |
129 | ||
130 | /* Serialize the length, including the null terminator. */ | |
131 | DBG("Serializing C string's length (including null terminator): " | |
132 | "%" PRIu32, len); | |
133 | ret = lttng_dynamic_buffer_append(buf, &len, sizeof(len)); | |
134 | if (ret) { | |
135 | goto end; | |
136 | } | |
137 | ||
138 | /* Serialize the string. */ | |
139 | DBG("Serializing C string: '%s'", str); | |
140 | ret = lttng_dynamic_buffer_append(buf, str, len); | |
141 | if (ret) { | |
142 | goto end; | |
143 | } | |
144 | ||
145 | end: | |
146 | return ret; | |
147 | } | |
148 | ||
149 | /* | |
150 | * Serializes the event expression `expr` into `buf`. | |
151 | */ | |
152 | static | |
153 | int serialize_event_expr(const struct lttng_event_expr *expr, | |
154 | struct lttng_payload *payload) | |
155 | { | |
156 | const uint8_t type = expr->type; | |
157 | int ret; | |
158 | ||
159 | /* Serialize the expression's type. */ | |
160 | DBG("Serializing event expression's type: %d", expr->type); | |
161 | ret = lttng_dynamic_buffer_append(&payload->buffer, &type, sizeof(type)); | |
162 | if (ret) { | |
163 | goto end; | |
164 | } | |
165 | ||
166 | /* Serialize the expression */ | |
167 | switch (expr->type) { | |
168 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
169 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
170 | { | |
171 | const struct lttng_event_expr_field *field_expr = | |
172 | container_of(expr, | |
173 | const struct lttng_event_expr_field, | |
174 | parent); | |
175 | ||
176 | /* Serialize the field name. */ | |
177 | DBG("Serializing field event expression's field name: '%s'", | |
178 | field_expr->name); | |
179 | ret = serialize_cstr(field_expr->name, &payload->buffer); | |
180 | if (ret) { | |
181 | goto end; | |
182 | } | |
183 | ||
184 | break; | |
185 | } | |
186 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
187 | { | |
188 | const struct lttng_event_expr_app_specific_context_field *field_expr = | |
189 | container_of(expr, | |
190 | const struct lttng_event_expr_app_specific_context_field, | |
191 | parent); | |
192 | ||
193 | /* Serialize the provider name. */ | |
194 | DBG("Serializing app-specific context field event expression's " | |
195 | "provider name: '%s'", | |
196 | field_expr->provider_name); | |
197 | ret = serialize_cstr(field_expr->provider_name, &payload->buffer); | |
198 | if (ret) { | |
199 | goto end; | |
200 | } | |
201 | ||
202 | /* Serialize the type name. */ | |
203 | DBG("Serializing app-specific context field event expression's " | |
204 | "type name: '%s'", | |
205 | field_expr->provider_name); | |
206 | ret = serialize_cstr(field_expr->type_name, &payload->buffer); | |
207 | if (ret) { | |
208 | goto end; | |
209 | } | |
210 | ||
211 | break; | |
212 | } | |
213 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
214 | { | |
215 | const struct lttng_event_expr_array_field_element *elem_expr = | |
216 | container_of(expr, | |
217 | const struct lttng_event_expr_array_field_element, | |
218 | parent); | |
219 | const uint32_t index = elem_expr->index; | |
220 | ||
221 | /* Serialize the index. */ | |
222 | DBG("Serializing array field element event expression's " | |
223 | "index: %u", elem_expr->index); | |
224 | ret = lttng_dynamic_buffer_append(&payload->buffer, &index, sizeof(index)); | |
225 | if (ret) { | |
226 | goto end; | |
227 | } | |
228 | ||
229 | /* Serialize the parent array field expression. */ | |
230 | DBG("Serializing array field element event expression's " | |
7c920b63 | 231 | "parent array field event expression"); |
38114013 PP |
232 | ret = serialize_event_expr(elem_expr->array_field_expr, payload); |
233 | if (ret) { | |
234 | goto end; | |
235 | } | |
236 | ||
237 | break; | |
238 | } | |
239 | default: | |
240 | break; | |
241 | } | |
242 | ||
243 | end: | |
244 | return ret; | |
245 | } | |
246 | ||
6fb7c690 JR |
247 | static |
248 | struct lttng_capture_descriptor * | |
d602bd6a | 249 | lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
6fb7c690 JR |
250 | const struct lttng_condition *condition, unsigned int index) |
251 | { | |
d602bd6a | 252 | const struct lttng_condition_on_event *on_event_cond = |
6fb7c690 | 253 | container_of(condition, |
d602bd6a | 254 | const struct lttng_condition_on_event, |
6fb7c690 JR |
255 | parent); |
256 | struct lttng_capture_descriptor *desc = NULL; | |
257 | unsigned int count; | |
258 | enum lttng_condition_status status; | |
259 | ||
d602bd6a | 260 | if (!condition || !IS_ON_EVENT_CONDITION(condition)) { |
6fb7c690 JR |
261 | goto end; |
262 | } | |
263 | ||
d602bd6a | 264 | status = lttng_condition_on_event_get_capture_descriptor_count( |
6fb7c690 JR |
265 | condition, &count); |
266 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
267 | goto end; | |
268 | } | |
269 | ||
270 | if (index >= count) { | |
271 | goto end; | |
272 | } | |
273 | ||
274 | desc = lttng_dynamic_pointer_array_get_pointer( | |
d602bd6a | 275 | &on_event_cond->capture_descriptors, index); |
6fb7c690 JR |
276 | end: |
277 | return desc; | |
278 | } | |
279 | ||
d602bd6a | 280 | static int lttng_condition_on_event_serialize( |
683d081a JR |
281 | const struct lttng_condition *condition, |
282 | struct lttng_payload *payload) | |
283 | { | |
284 | int ret; | |
d602bd6a | 285 | struct lttng_condition_on_event *on_event_condition; |
0912b5ea | 286 | enum lttng_condition_status status; |
38114013 PP |
287 | /* Used for iteration and communication (size matters). */ |
288 | uint32_t i, capture_descr_count; | |
35a9ac41 | 289 | LTTNG_OPTIONAL_COMM(typeof(on_event_condition->error_count.value)) error_count_comm; |
683d081a | 290 | |
d602bd6a | 291 | if (!condition || !IS_ON_EVENT_CONDITION(condition)) { |
683d081a JR |
292 | ret = -1; |
293 | goto end; | |
294 | } | |
295 | ||
d602bd6a JR |
296 | DBG("Serializing on event condition"); |
297 | on_event_condition = container_of( | |
298 | condition, struct lttng_condition_on_event, parent); | |
683d081a | 299 | |
d602bd6a JR |
300 | DBG("Serializing on event condition's event rule"); |
301 | ret = lttng_event_rule_serialize(on_event_condition->rule, payload); | |
683d081a JR |
302 | if (ret) { |
303 | goto end; | |
304 | } | |
305 | ||
35a9ac41 FD |
306 | error_count_comm = (typeof(error_count_comm)) { |
307 | .is_set = on_event_condition->error_count.is_set, | |
308 | .value = on_event_condition->error_count.value, | |
309 | }; | |
310 | ||
311 | { | |
312 | char error_count_value_str[MAX_INT_DEC_LEN(on_event_condition->error_count.value)]; | |
313 | const int fmt_ret = snprintf(error_count_value_str, | |
314 | sizeof(error_count_value_str), "%" PRIu64, | |
315 | on_event_condition->error_count.value); | |
316 | ||
317 | assert(fmt_ret > 0); | |
318 | DBG("Serializing event rule condition's error count: value = %s", | |
319 | on_event_condition->error_count.is_set ? | |
320 | error_count_value_str : | |
321 | "(unset)"); | |
322 | } | |
323 | ||
324 | ret = lttng_dynamic_buffer_append(&payload->buffer, &error_count_comm, | |
325 | sizeof(error_count_comm)); | |
326 | if (ret) { | |
327 | goto end; | |
328 | } | |
329 | ||
d602bd6a | 330 | status = lttng_condition_on_event_get_capture_descriptor_count( |
0912b5ea JR |
331 | condition, &capture_descr_count); |
332 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
333 | ret = -1; | |
334 | goto end; | |
335 | }; | |
336 | ||
d602bd6a | 337 | DBG("Serializing on event condition's capture descriptor count: %" PRIu32, |
38114013 PP |
338 | capture_descr_count); |
339 | ret = lttng_dynamic_buffer_append(&payload->buffer, &capture_descr_count, | |
340 | sizeof(capture_descr_count)); | |
683d081a JR |
341 | if (ret) { |
342 | goto end; | |
343 | } | |
344 | ||
38114013 | 345 | for (i = 0; i < capture_descr_count; i++) { |
6fb7c690 | 346 | const struct lttng_capture_descriptor *desc = |
d602bd6a | 347 | lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
0912b5ea | 348 | condition, i); |
38114013 | 349 | |
d602bd6a | 350 | DBG("Serializing on event condition's capture descriptor %" PRIu32, |
38114013 | 351 | i); |
6fb7c690 | 352 | ret = serialize_event_expr(desc->event_expression, payload); |
38114013 PP |
353 | if (ret) { |
354 | goto end; | |
355 | } | |
356 | } | |
683d081a JR |
357 | |
358 | end: | |
359 | return ret; | |
360 | } | |
361 | ||
38114013 PP |
362 | static |
363 | bool capture_descriptors_are_equal( | |
0912b5ea JR |
364 | const struct lttng_condition *condition_a, |
365 | const struct lttng_condition *condition_b) | |
38114013 PP |
366 | { |
367 | bool is_equal = true; | |
0912b5ea JR |
368 | unsigned int capture_descr_count_a; |
369 | unsigned int capture_descr_count_b; | |
38114013 | 370 | size_t i; |
0912b5ea | 371 | enum lttng_condition_status status; |
38114013 | 372 | |
d602bd6a | 373 | status = lttng_condition_on_event_get_capture_descriptor_count( |
0912b5ea JR |
374 | condition_a, &capture_descr_count_a); |
375 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
376 | goto not_equal; | |
377 | } | |
378 | ||
d602bd6a | 379 | status = lttng_condition_on_event_get_capture_descriptor_count( |
0912b5ea JR |
380 | condition_b, &capture_descr_count_b); |
381 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
382 | goto not_equal; | |
383 | } | |
38114013 PP |
384 | |
385 | if (capture_descr_count_a != capture_descr_count_b) { | |
386 | goto not_equal; | |
387 | } | |
388 | ||
389 | for (i = 0; i < capture_descr_count_a; i++) { | |
390 | const struct lttng_event_expr *expr_a = | |
d602bd6a | 391 | lttng_condition_on_event_get_capture_descriptor_at_index( |
0912b5ea | 392 | condition_a, |
38114013 PP |
393 | i); |
394 | const struct lttng_event_expr *expr_b = | |
d602bd6a | 395 | lttng_condition_on_event_get_capture_descriptor_at_index( |
0912b5ea | 396 | condition_b, |
38114013 PP |
397 | i); |
398 | ||
399 | if (!lttng_event_expr_is_equal(expr_a, expr_b)) { | |
400 | goto not_equal; | |
401 | } | |
402 | } | |
403 | ||
404 | goto end; | |
405 | ||
406 | not_equal: | |
407 | is_equal = false; | |
408 | ||
409 | end: | |
410 | return is_equal; | |
411 | } | |
412 | ||
d602bd6a | 413 | static bool lttng_condition_on_event_is_equal( |
683d081a JR |
414 | const struct lttng_condition *_a, |
415 | const struct lttng_condition *_b) | |
416 | { | |
417 | bool is_equal = false; | |
d602bd6a | 418 | struct lttng_condition_on_event *a, *b; |
683d081a | 419 | |
d602bd6a JR |
420 | a = container_of(_a, struct lttng_condition_on_event, parent); |
421 | b = container_of(_b, struct lttng_condition_on_event, parent); | |
683d081a JR |
422 | |
423 | /* Both event rules must be set or both must be unset. */ | |
424 | if ((a->rule && !b->rule) || (!a->rule && b->rule)) { | |
425 | WARN("Comparing event_rule conditions with uninitialized rule"); | |
426 | goto end; | |
427 | } | |
428 | ||
429 | is_equal = lttng_event_rule_is_equal(a->rule, b->rule); | |
38114013 PP |
430 | if (!is_equal) { |
431 | goto end; | |
432 | } | |
433 | ||
0912b5ea | 434 | is_equal = capture_descriptors_are_equal(_a, _b); |
38114013 | 435 | |
683d081a JR |
436 | end: |
437 | return is_equal; | |
438 | } | |
439 | ||
d602bd6a | 440 | static void lttng_condition_on_event_destroy( |
683d081a JR |
441 | struct lttng_condition *condition) |
442 | { | |
d602bd6a | 443 | struct lttng_condition_on_event *on_event_condition; |
683d081a | 444 | |
d602bd6a JR |
445 | on_event_condition = container_of( |
446 | condition, struct lttng_condition_on_event, parent); | |
683d081a | 447 | |
d602bd6a JR |
448 | lttng_event_rule_put(on_event_condition->rule); |
449 | lttng_dynamic_pointer_array_reset(&on_event_condition->capture_descriptors); | |
450 | free(on_event_condition); | |
683d081a JR |
451 | } |
452 | ||
38114013 | 453 | static |
0912b5ea | 454 | void destroy_capture_descriptor(void *ptr) |
38114013 | 455 | { |
0912b5ea JR |
456 | struct lttng_capture_descriptor *desc = |
457 | (struct lttng_capture_descriptor *) ptr; | |
458 | ||
459 | lttng_event_expr_destroy(desc->event_expression); | |
460 | free(desc->bytecode); | |
461 | free(desc); | |
38114013 PP |
462 | } |
463 | ||
d602bd6a | 464 | struct lttng_condition *lttng_condition_on_event_create( |
683d081a JR |
465 | struct lttng_event_rule *rule) |
466 | { | |
467 | struct lttng_condition *parent = NULL; | |
d602bd6a | 468 | struct lttng_condition_on_event *condition = NULL; |
683d081a JR |
469 | |
470 | if (!rule) { | |
471 | goto end; | |
472 | } | |
473 | ||
d602bd6a | 474 | condition = zmalloc(sizeof(struct lttng_condition_on_event)); |
683d081a JR |
475 | if (!condition) { |
476 | return NULL; | |
477 | } | |
478 | ||
479 | lttng_condition_init(&condition->parent, | |
d602bd6a JR |
480 | LTTNG_CONDITION_TYPE_ON_EVENT); |
481 | condition->parent.validate = lttng_condition_on_event_validate, | |
482 | condition->parent.serialize = lttng_condition_on_event_serialize, | |
483 | condition->parent.equal = lttng_condition_on_event_is_equal, | |
484 | condition->parent.destroy = lttng_condition_on_event_destroy, | |
683d081a JR |
485 | |
486 | lttng_event_rule_get(rule); | |
487 | condition->rule = rule; | |
488 | rule = NULL; | |
489 | ||
38114013 | 490 | lttng_dynamic_pointer_array_init(&condition->capture_descriptors, |
0912b5ea | 491 | destroy_capture_descriptor); |
38114013 | 492 | |
683d081a JR |
493 | parent = &condition->parent; |
494 | end: | |
495 | return parent; | |
496 | } | |
497 | ||
38114013 PP |
498 | static |
499 | uint64_t uint_from_buffer(const struct lttng_buffer_view *view, size_t size, | |
500 | size_t *offset) | |
501 | { | |
502 | uint64_t ret; | |
503 | const struct lttng_buffer_view uint_view = | |
504 | lttng_buffer_view_from_view(view, *offset, size); | |
505 | ||
506 | if (!lttng_buffer_view_is_valid(&uint_view)) { | |
507 | ret = UINT64_C(-1); | |
508 | goto end; | |
509 | } | |
510 | ||
511 | switch (size) { | |
512 | case 1: | |
513 | ret = (uint64_t) *uint_view.data; | |
514 | break; | |
515 | case sizeof(uint32_t): | |
516 | { | |
517 | uint32_t u32; | |
518 | ||
519 | memcpy(&u32, uint_view.data, sizeof(u32)); | |
520 | ret = (uint64_t) u32; | |
521 | break; | |
522 | } | |
523 | case sizeof(ret): | |
524 | memcpy(&ret, uint_view.data, sizeof(ret)); | |
525 | break; | |
526 | default: | |
527 | abort(); | |
528 | } | |
529 | ||
530 | *offset += size; | |
531 | ||
532 | end: | |
533 | return ret; | |
534 | } | |
535 | ||
35a9ac41 FD |
536 | static |
537 | int optional_uint_from_buffer( | |
538 | const struct lttng_buffer_view *view, | |
539 | size_t inner_value_size, | |
540 | size_t *offset, | |
541 | optional_uint64 *value) | |
542 | { | |
543 | int ret; | |
544 | ||
545 | /* | |
546 | * Those cases are identical except for the optional's inner type width. | |
547 | */ | |
548 | switch (inner_value_size) { | |
549 | case sizeof(uint8_t): | |
550 | { | |
551 | LTTNG_OPTIONAL_COMM(uint8_t) *value_comm; | |
552 | const struct lttng_buffer_view optional_uint_view = | |
553 | lttng_buffer_view_from_view(view, *offset, | |
554 | sizeof(*value_comm)); | |
555 | ||
556 | if (!lttng_buffer_view_is_valid(&optional_uint_view)) { | |
557 | ret = -1; | |
558 | goto end; | |
559 | } | |
560 | ||
561 | value_comm = (typeof(value_comm)) optional_uint_view.data; | |
562 | *value = (typeof(*value)) { | |
563 | .is_set = value_comm->is_set, | |
564 | .value = (uint64_t) value_comm->value, | |
565 | }; | |
566 | ||
567 | *offset += sizeof(*value_comm); | |
568 | break; | |
569 | } | |
570 | case sizeof(uint16_t): | |
571 | { | |
572 | LTTNG_OPTIONAL_COMM(uint16_t) *value_comm; | |
573 | const struct lttng_buffer_view optional_uint_view = | |
574 | lttng_buffer_view_from_view(view, *offset, | |
575 | sizeof(*value_comm)); | |
576 | ||
577 | if (!lttng_buffer_view_is_valid(&optional_uint_view)) { | |
578 | ret = -1; | |
579 | goto end; | |
580 | } | |
581 | ||
582 | value_comm = (typeof(value_comm)) optional_uint_view.data; | |
583 | *value = (typeof(*value)) { | |
584 | .is_set = value_comm->is_set, | |
585 | .value = (uint64_t) value_comm->value, | |
586 | }; | |
587 | ||
588 | *offset += sizeof(*value_comm); | |
589 | break; | |
590 | } | |
591 | case sizeof(uint32_t): | |
592 | { | |
593 | LTTNG_OPTIONAL_COMM(uint32_t) *value_comm; | |
594 | const struct lttng_buffer_view optional_uint_view = | |
595 | lttng_buffer_view_from_view(view, *offset, | |
596 | sizeof(*value_comm)); | |
597 | ||
598 | if (!lttng_buffer_view_is_valid(&optional_uint_view)) { | |
599 | ret = -1; | |
600 | goto end; | |
601 | } | |
602 | ||
603 | value_comm = (typeof(value_comm)) optional_uint_view.data; | |
604 | *value = (typeof(*value)) { | |
605 | .is_set = value_comm->is_set, | |
606 | .value = (uint64_t) value_comm->value, | |
607 | }; | |
608 | ||
609 | *offset += sizeof(*value_comm); | |
610 | break; | |
611 | } | |
612 | case sizeof(uint64_t): | |
613 | { | |
614 | LTTNG_OPTIONAL_COMM(uint64_t) *value_comm; | |
615 | const struct lttng_buffer_view optional_uint_view = | |
616 | lttng_buffer_view_from_view(view, *offset, | |
617 | sizeof(*value_comm)); | |
618 | ||
619 | if (!lttng_buffer_view_is_valid(&optional_uint_view)) { | |
620 | ret = -1; | |
621 | goto end; | |
622 | } | |
623 | ||
624 | value_comm = (typeof(value_comm)) optional_uint_view.data; | |
625 | *value = (typeof(*value)) { | |
626 | .is_set = value_comm->is_set, | |
627 | .value = (uint64_t) value_comm->value, | |
628 | }; | |
629 | ||
630 | *offset += sizeof(*value_comm); | |
631 | break; | |
632 | } | |
633 | default: | |
634 | abort(); | |
635 | } | |
636 | ||
637 | ret = 0; | |
638 | end: | |
639 | return ret; | |
640 | } | |
641 | ||
38114013 PP |
642 | static |
643 | const char *str_from_buffer(const struct lttng_buffer_view *view, | |
644 | size_t *offset) | |
645 | { | |
646 | uint64_t len; | |
647 | const char *ret; | |
648 | ||
649 | len = uint_from_buffer(view, sizeof(uint32_t), offset); | |
650 | if (len == UINT64_C(-1)) { | |
651 | goto error; | |
652 | } | |
653 | ||
654 | ret = &view->data[*offset]; | |
655 | ||
656 | if (!lttng_buffer_view_contains_string(view, ret, len)) { | |
657 | goto error; | |
658 | } | |
659 | ||
660 | *offset += len; | |
661 | goto end; | |
662 | ||
663 | error: | |
664 | ret = NULL; | |
665 | ||
666 | end: | |
667 | return ret; | |
668 | } | |
669 | ||
670 | static | |
671 | struct lttng_event_expr *event_expr_from_payload( | |
672 | struct lttng_payload_view *view, size_t *offset) | |
673 | { | |
674 | struct lttng_event_expr *expr = NULL; | |
675 | const char *str; | |
676 | uint64_t type; | |
677 | ||
678 | type = uint_from_buffer(&view->buffer, sizeof(uint8_t), offset); | |
679 | if (type == UINT64_C(-1)) { | |
680 | goto error; | |
681 | } | |
682 | ||
683 | switch (type) { | |
684 | case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD: | |
685 | str = str_from_buffer(&view->buffer, offset); | |
686 | if (!str) { | |
687 | goto error; | |
688 | } | |
689 | ||
690 | expr = lttng_event_expr_event_payload_field_create(str); | |
691 | break; | |
692 | case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD: | |
693 | str = str_from_buffer(&view->buffer, offset); | |
694 | if (!str) { | |
695 | goto error; | |
696 | } | |
697 | ||
698 | expr = lttng_event_expr_channel_context_field_create(str); | |
699 | break; | |
700 | case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD: | |
701 | { | |
702 | const char *provider_name; | |
703 | const char *type_name; | |
704 | ||
705 | provider_name = str_from_buffer(&view->buffer, offset); | |
706 | if (!provider_name) { | |
707 | goto error; | |
708 | } | |
709 | ||
710 | type_name = str_from_buffer(&view->buffer, offset); | |
711 | if (!type_name) { | |
712 | goto error; | |
713 | } | |
714 | ||
715 | expr = lttng_event_expr_app_specific_context_field_create( | |
716 | provider_name, type_name); | |
717 | break; | |
718 | } | |
719 | case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT: | |
720 | { | |
721 | struct lttng_event_expr *array_field_expr; | |
722 | const uint64_t index = uint_from_buffer( | |
723 | &view->buffer, sizeof(uint32_t), offset); | |
724 | ||
725 | if (index == UINT64_C(-1)) { | |
726 | goto error; | |
727 | } | |
728 | ||
729 | /* Array field expression is the encoded after this. */ | |
730 | array_field_expr = event_expr_from_payload(view, offset); | |
731 | if (!array_field_expr) { | |
732 | goto error; | |
733 | } | |
734 | ||
735 | /* Move ownership of `array_field_expr` to new expression. */ | |
736 | expr = lttng_event_expr_array_field_element_create( | |
737 | array_field_expr, (unsigned int) index); | |
738 | if (!expr) { | |
739 | /* `array_field_expr` not moved: destroy it. */ | |
740 | lttng_event_expr_destroy(array_field_expr); | |
741 | } | |
742 | ||
743 | break; | |
744 | } | |
745 | default: | |
52894180 JG |
746 | ERR("Invalid event expression type encoutered while deserializing event expression: type = %" PRIu64, |
747 | type); | |
748 | goto error; | |
38114013 PP |
749 | } |
750 | ||
751 | goto end; | |
752 | ||
753 | error: | |
754 | lttng_event_expr_destroy(expr); | |
755 | expr = NULL; | |
756 | ||
757 | end: | |
758 | return expr; | |
759 | } | |
760 | ||
683d081a | 761 | LTTNG_HIDDEN |
d602bd6a | 762 | ssize_t lttng_condition_on_event_create_from_payload( |
683d081a JR |
763 | struct lttng_payload_view *view, |
764 | struct lttng_condition **_condition) | |
765 | { | |
35a9ac41 | 766 | int optional_ret; |
38114013 PP |
767 | ssize_t consumed_length; |
768 | size_t offset = 0; | |
769 | ssize_t event_rule_length; | |
770 | uint32_t i, capture_descr_count; | |
35a9ac41 | 771 | optional_uint64 error_count; |
683d081a JR |
772 | struct lttng_condition *condition = NULL; |
773 | struct lttng_event_rule *event_rule = NULL; | |
683d081a JR |
774 | |
775 | if (!view || !_condition) { | |
776 | goto error; | |
777 | } | |
778 | ||
38114013 | 779 | /* Struct lttng_event_rule. */ |
683d081a JR |
780 | { |
781 | struct lttng_payload_view event_rule_view = | |
782 | lttng_payload_view_from_view(view, offset, -1); | |
783 | ||
784 | event_rule_length = lttng_event_rule_create_from_payload( | |
785 | &event_rule_view, &event_rule); | |
786 | } | |
787 | ||
788 | if (event_rule_length < 0 || !event_rule) { | |
789 | goto error; | |
790 | } | |
791 | ||
35a9ac41 FD |
792 | offset += event_rule_length; |
793 | ||
794 | /* Error count. */ | |
795 | optional_ret = optional_uint_from_buffer(&view->buffer, | |
796 | sizeof(error_count.value), &offset, | |
797 | &error_count); | |
798 | if (optional_ret) { | |
799 | goto error; | |
800 | } | |
801 | ||
d602bd6a JR |
802 | /* Create condition (no capture descriptors yet) at this point */ |
803 | condition = lttng_condition_on_event_create(event_rule); | |
38114013 | 804 | if (!condition) { |
683d081a JR |
805 | goto error; |
806 | } | |
807 | ||
35a9ac41 FD |
808 | if (error_count.is_set) { |
809 | lttng_condition_on_event_set_error_count( | |
810 | condition, error_count.value); | |
811 | } | |
812 | ||
38114013 PP |
813 | /* Capture descriptor count. */ |
814 | assert(event_rule_length >= 0); | |
38114013 PP |
815 | capture_descr_count = uint_from_buffer(&view->buffer, sizeof(uint32_t), &offset); |
816 | if (capture_descr_count == UINT32_C(-1)) { | |
683d081a JR |
817 | goto error; |
818 | } | |
819 | ||
38114013 PP |
820 | /* Capture descriptors. */ |
821 | for (i = 0; i < capture_descr_count; i++) { | |
6fb7c690 | 822 | enum lttng_condition_status status; |
38114013 PP |
823 | struct lttng_event_expr *expr = event_expr_from_payload( |
824 | view, &offset); | |
38114013 PP |
825 | |
826 | if (!expr) { | |
827 | goto error; | |
828 | } | |
829 | ||
830 | /* Move ownership of `expr` to `condition`. */ | |
d602bd6a | 831 | status = lttng_condition_on_event_append_capture_descriptor( |
38114013 PP |
832 | condition, expr); |
833 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
834 | /* `expr` not moved: destroy it. */ | |
835 | lttng_event_expr_destroy(expr); | |
836 | goto error; | |
837 | } | |
838 | } | |
839 | ||
840 | consumed_length = (ssize_t) offset; | |
683d081a JR |
841 | *_condition = condition; |
842 | condition = NULL; | |
843 | goto end; | |
844 | ||
845 | error: | |
38114013 | 846 | consumed_length = -1; |
683d081a JR |
847 | |
848 | end: | |
849 | lttng_event_rule_put(event_rule); | |
850 | lttng_condition_put(condition); | |
38114013 | 851 | return consumed_length; |
683d081a JR |
852 | } |
853 | ||
854 | LTTNG_HIDDEN | |
d602bd6a | 855 | enum lttng_condition_status lttng_condition_on_event_borrow_rule_mutable( |
683d081a JR |
856 | const struct lttng_condition *condition, |
857 | struct lttng_event_rule **rule) | |
858 | { | |
d602bd6a | 859 | struct lttng_condition_on_event *event_rule; |
683d081a JR |
860 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; |
861 | ||
d602bd6a | 862 | if (!condition || !IS_ON_EVENT_CONDITION(condition) || !rule) { |
683d081a JR |
863 | status = LTTNG_CONDITION_STATUS_INVALID; |
864 | goto end; | |
865 | } | |
866 | ||
867 | event_rule = container_of( | |
d602bd6a | 868 | condition, struct lttng_condition_on_event, parent); |
683d081a JR |
869 | if (!event_rule->rule) { |
870 | status = LTTNG_CONDITION_STATUS_UNSET; | |
871 | goto end; | |
872 | } | |
873 | ||
874 | *rule = event_rule->rule; | |
875 | end: | |
876 | return status; | |
877 | } | |
878 | ||
d602bd6a | 879 | enum lttng_condition_status lttng_condition_on_event_get_rule( |
683d081a JR |
880 | const struct lttng_condition *condition, |
881 | const struct lttng_event_rule **rule) | |
882 | { | |
883 | struct lttng_event_rule *mutable_rule = NULL; | |
884 | const enum lttng_condition_status status = | |
d602bd6a | 885 | lttng_condition_on_event_borrow_rule_mutable( |
683d081a JR |
886 | condition, &mutable_rule); |
887 | ||
888 | *rule = mutable_rule; | |
889 | return status; | |
890 | } | |
891 | ||
35a9ac41 FD |
892 | LTTNG_HIDDEN |
893 | void lttng_condition_on_event_set_error_counter_index( | |
894 | struct lttng_condition *condition, uint64_t error_counter_index) | |
895 | { | |
896 | struct lttng_condition_on_event *on_event_cond = | |
897 | container_of(condition, | |
898 | struct lttng_condition_on_event, parent); | |
899 | ||
900 | LTTNG_OPTIONAL_SET(&on_event_cond->error_counter_index, error_counter_index); | |
901 | } | |
902 | ||
903 | LTTNG_HIDDEN | |
904 | uint64_t lttng_condition_on_event_get_error_counter_index( | |
905 | const struct lttng_condition *condition) | |
906 | { | |
907 | const struct lttng_condition_on_event *on_event_cond = | |
908 | container_of(condition, | |
909 | const struct lttng_condition_on_event, parent); | |
910 | ||
911 | return LTTNG_OPTIONAL_GET(on_event_cond->error_counter_index); | |
912 | } | |
913 | ||
914 | LTTNG_HIDDEN | |
915 | void lttng_condition_on_event_set_error_count(struct lttng_condition *condition, | |
916 | uint64_t error_count) | |
917 | { | |
918 | struct lttng_condition_on_event *on_event_cond = | |
919 | container_of(condition, | |
920 | struct lttng_condition_on_event, parent); | |
921 | ||
922 | LTTNG_OPTIONAL_SET(&on_event_cond->error_count, error_count); | |
923 | } | |
924 | ||
925 | uint64_t lttng_condition_on_event_get_error_count( | |
926 | const struct lttng_condition *condition) | |
927 | { | |
928 | const struct lttng_condition_on_event *on_event_cond = | |
929 | container_of(condition, | |
930 | const struct lttng_condition_on_event, parent); | |
931 | ||
932 | return LTTNG_OPTIONAL_GET(on_event_cond->error_count); | |
933 | } | |
934 | ||
38114013 | 935 | enum lttng_condition_status |
d602bd6a | 936 | lttng_condition_on_event_append_capture_descriptor( |
38114013 PP |
937 | struct lttng_condition *condition, |
938 | struct lttng_event_expr *expr) | |
939 | { | |
940 | int ret; | |
941 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
35a9ac41 | 942 | struct lttng_condition_on_event *on_event_cond = |
38114013 | 943 | container_of(condition, |
d602bd6a | 944 | struct lttng_condition_on_event, parent); |
0912b5ea | 945 | struct lttng_capture_descriptor *descriptor = NULL; |
81d566c9 | 946 | const struct lttng_event_rule *rule = NULL; |
38114013 PP |
947 | |
948 | /* Only accept l-values. */ | |
d602bd6a | 949 | if (!condition || !IS_ON_EVENT_CONDITION(condition) || !expr || |
38114013 PP |
950 | !lttng_event_expr_is_lvalue(expr)) { |
951 | status = LTTNG_CONDITION_STATUS_INVALID; | |
81d566c9 JR |
952 | goto end; |
953 | } | |
954 | ||
d602bd6a | 955 | status = lttng_condition_on_event_get_rule(condition, &rule); |
81d566c9 JR |
956 | if (status != LTTNG_CONDITION_STATUS_OK) { |
957 | goto end; | |
958 | } | |
959 | ||
960 | switch(lttng_event_rule_get_type(rule)) { | |
961 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
962 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
963 | /* Supported. */ | |
964 | status = LTTNG_CONDITION_STATUS_OK; | |
965 | break; | |
966 | case LTTNG_EVENT_RULE_TYPE_UNKNOWN: | |
967 | status = LTTNG_CONDITION_STATUS_INVALID; | |
968 | break; | |
969 | default: | |
970 | status = LTTNG_CONDITION_STATUS_UNSUPPORTED; | |
971 | break; | |
972 | } | |
973 | ||
974 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
38114013 PP |
975 | goto end; |
976 | } | |
977 | ||
0912b5ea JR |
978 | descriptor = malloc(sizeof(*descriptor)); |
979 | if (descriptor == NULL) { | |
980 | status = LTTNG_CONDITION_STATUS_ERROR; | |
981 | goto end; | |
982 | } | |
983 | ||
984 | descriptor->event_expression = expr; | |
985 | descriptor->bytecode = NULL; | |
986 | ||
38114013 | 987 | ret = lttng_dynamic_pointer_array_add_pointer( |
35a9ac41 | 988 | &on_event_cond->capture_descriptors, descriptor); |
38114013 PP |
989 | if (ret) { |
990 | status = LTTNG_CONDITION_STATUS_ERROR; | |
991 | goto end; | |
992 | } | |
993 | ||
0912b5ea JR |
994 | /* Ownership is transfered to the internal capture_descriptors array */ |
995 | descriptor = NULL; | |
38114013 | 996 | end: |
0912b5ea | 997 | free(descriptor); |
38114013 PP |
998 | return status; |
999 | } | |
1000 | ||
1001 | enum lttng_condition_status | |
d602bd6a | 1002 | lttng_condition_on_event_get_capture_descriptor_count( |
38114013 PP |
1003 | const struct lttng_condition *condition, unsigned int *count) |
1004 | { | |
1005 | enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; | |
d602bd6a | 1006 | const struct lttng_condition_on_event *on_event_condition = |
38114013 | 1007 | container_of(condition, |
d602bd6a | 1008 | const struct lttng_condition_on_event, |
38114013 PP |
1009 | parent); |
1010 | ||
d602bd6a | 1011 | if (!condition || !IS_ON_EVENT_CONDITION(condition) || !count) { |
38114013 PP |
1012 | status = LTTNG_CONDITION_STATUS_INVALID; |
1013 | goto end; | |
1014 | } | |
1015 | ||
1016 | *count = lttng_dynamic_pointer_array_get_count( | |
d602bd6a | 1017 | &on_event_condition->capture_descriptors); |
38114013 PP |
1018 | |
1019 | end: | |
1020 | return status; | |
1021 | } | |
1022 | ||
1023 | const struct lttng_event_expr * | |
d602bd6a | 1024 | lttng_condition_on_event_get_capture_descriptor_at_index( |
38114013 PP |
1025 | const struct lttng_condition *condition, unsigned int index) |
1026 | { | |
38114013 | 1027 | const struct lttng_event_expr *expr = NULL; |
6fb7c690 | 1028 | const struct lttng_capture_descriptor *desc = NULL; |
0912b5ea | 1029 | |
d602bd6a | 1030 | desc = lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
6fb7c690 JR |
1031 | condition, index); |
1032 | if (desc == NULL) { | |
38114013 PP |
1033 | goto end; |
1034 | } | |
0912b5ea | 1035 | expr = desc->event_expression; |
38114013 PP |
1036 | |
1037 | end: | |
1038 | return expr; | |
1039 | } | |
1040 | ||
683d081a | 1041 | LTTNG_HIDDEN |
d602bd6a JR |
1042 | ssize_t lttng_evaluation_on_event_create_from_payload( |
1043 | const struct lttng_condition_on_event *condition, | |
683d081a JR |
1044 | struct lttng_payload_view *view, |
1045 | struct lttng_evaluation **_evaluation) | |
1046 | { | |
1047 | ssize_t ret, offset = 0; | |
1048 | const char *trigger_name; | |
1049 | struct lttng_evaluation *evaluation = NULL; | |
d602bd6a | 1050 | const struct lttng_evaluation_on_event_comm *header; |
683d081a JR |
1051 | const struct lttng_payload_view header_view = |
1052 | lttng_payload_view_from_view( | |
1053 | view, 0, sizeof(*header)); | |
7c920b63 PP |
1054 | uint32_t capture_payload_size; |
1055 | const char *capture_payload = NULL; | |
683d081a JR |
1056 | |
1057 | if (!_evaluation) { | |
1058 | ret = -1; | |
1059 | goto error; | |
1060 | } | |
1061 | ||
1062 | if (!lttng_payload_view_is_valid(&header_view)) { | |
1063 | ERR("Failed to initialize from malformed event rule evaluation: buffer too short to contain header"); | |
1064 | ret = -1; | |
1065 | goto error; | |
1066 | } | |
1067 | ||
1068 | header = (typeof(header)) header_view.buffer.data; | |
1069 | ||
1070 | /* Map the originating trigger's name. */ | |
1071 | offset += sizeof(*header); | |
1072 | { | |
7c920b63 | 1073 | const struct lttng_payload_view current_view = |
683d081a JR |
1074 | lttng_payload_view_from_view(view, offset, |
1075 | header->trigger_name_length); | |
1076 | ||
1077 | if (!lttng_payload_view_is_valid(¤t_view)) { | |
1078 | ERR("Failed to initialize from malformed event rule evaluation: buffer too short to contain trigger name"); | |
1079 | ret = -1; | |
1080 | goto error; | |
1081 | } | |
1082 | ||
1083 | trigger_name = current_view.buffer.data; | |
1084 | if (!lttng_buffer_view_contains_string(¤t_view.buffer, | |
1085 | trigger_name, header->trigger_name_length)) { | |
1086 | ERR("Failed to initialize from malformed event rule evaluation: invalid trigger name"); | |
1087 | ret = -1; | |
1088 | goto error; | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | offset += header->trigger_name_length; | |
7c920b63 PP |
1093 | { |
1094 | const struct lttng_payload_view current_view = | |
1095 | lttng_payload_view_from_view(view, offset, -1); | |
1096 | ||
1097 | if (current_view.buffer.size < sizeof(capture_payload_size)) { | |
1098 | ret = -1; | |
1099 | goto error; | |
1100 | } | |
683d081a | 1101 | |
7c920b63 PP |
1102 | memcpy(&capture_payload_size, current_view.buffer.data, |
1103 | sizeof(capture_payload_size)); | |
1104 | } | |
1105 | offset += sizeof(capture_payload_size); | |
1106 | ||
1107 | if (capture_payload_size > 0) { | |
1108 | const struct lttng_payload_view current_view = | |
1109 | lttng_payload_view_from_view(view, offset, -1); | |
1110 | ||
1111 | if (current_view.buffer.size < capture_payload_size) { | |
1112 | ret = -1; | |
1113 | goto error; | |
1114 | } | |
1115 | ||
1116 | capture_payload = current_view.buffer.data; | |
1117 | } | |
1118 | ||
d602bd6a | 1119 | evaluation = lttng_evaluation_on_event_create(condition, trigger_name, |
7c920b63 | 1120 | capture_payload, capture_payload_size, true); |
683d081a JR |
1121 | if (!evaluation) { |
1122 | ret = -1; | |
1123 | goto error; | |
1124 | } | |
1125 | ||
7c920b63 | 1126 | offset += capture_payload_size; |
683d081a JR |
1127 | *_evaluation = evaluation; |
1128 | evaluation = NULL; | |
1129 | ret = offset; | |
1130 | ||
1131 | error: | |
1132 | lttng_evaluation_destroy(evaluation); | |
1133 | return ret; | |
1134 | } | |
1135 | ||
d602bd6a | 1136 | static int lttng_evaluation_on_event_serialize( |
683d081a JR |
1137 | const struct lttng_evaluation *evaluation, |
1138 | struct lttng_payload *payload) | |
1139 | { | |
1140 | int ret = 0; | |
d602bd6a JR |
1141 | struct lttng_evaluation_on_event *hit; |
1142 | struct lttng_evaluation_on_event_comm comm; | |
7c920b63 | 1143 | uint32_t capture_payload_size; |
683d081a JR |
1144 | |
1145 | hit = container_of( | |
d602bd6a | 1146 | evaluation, struct lttng_evaluation_on_event, parent); |
683d081a JR |
1147 | |
1148 | assert(hit->name); | |
1149 | comm.trigger_name_length = strlen(hit->name) + 1; | |
1150 | ||
1151 | ret = lttng_dynamic_buffer_append( | |
1152 | &payload->buffer, &comm, sizeof(comm)); | |
1153 | if (ret) { | |
1154 | goto end; | |
1155 | } | |
1156 | ||
1157 | ret = lttng_dynamic_buffer_append( | |
1158 | &payload->buffer, hit->name, comm.trigger_name_length); | |
7c920b63 PP |
1159 | if (ret) { |
1160 | goto end; | |
1161 | } | |
1162 | ||
1163 | capture_payload_size = (uint32_t) hit->capture_payload.size; | |
1164 | ret = lttng_dynamic_buffer_append(&payload->buffer, &capture_payload_size, | |
1165 | sizeof(capture_payload_size)); | |
1166 | if (ret) { | |
1167 | goto end; | |
1168 | } | |
1169 | ||
1170 | ret = lttng_dynamic_buffer_append(&payload->buffer, hit->capture_payload.data, | |
1171 | hit->capture_payload.size); | |
1172 | if (ret) { | |
1173 | goto end; | |
1174 | } | |
1175 | ||
1176 | end: | |
1177 | return ret; | |
1178 | } | |
1179 | ||
1180 | static | |
1181 | bool msgpack_str_is_equal(const struct msgpack_object *obj, const char *str) | |
1182 | { | |
1183 | bool is_equal = true; | |
1184 | ||
1185 | assert(obj->type == MSGPACK_OBJECT_STR); | |
1186 | ||
1187 | if (obj->via.str.size != strlen(str)) { | |
1188 | is_equal = false; | |
1189 | goto end; | |
1190 | } | |
1191 | ||
1192 | if (strncmp(obj->via.str.ptr, str, obj->via.str.size) != 0) { | |
1193 | is_equal = false; | |
1194 | goto end; | |
1195 | } | |
1196 | ||
1197 | end: | |
1198 | return is_equal; | |
1199 | } | |
1200 | ||
1201 | static | |
1202 | const msgpack_object *get_msgpack_map_obj(const struct msgpack_object *map_obj, | |
1203 | const char *name) | |
1204 | { | |
1205 | const msgpack_object *ret = NULL; | |
1206 | size_t i; | |
1207 | ||
1208 | assert(map_obj->type == MSGPACK_OBJECT_MAP); | |
1209 | ||
1210 | for (i = 0; i < map_obj->via.map.size; i++) { | |
1211 | const struct msgpack_object_kv *kv = &map_obj->via.map.ptr[i]; | |
1212 | ||
1213 | assert(kv->key.type == MSGPACK_OBJECT_STR); | |
1214 | ||
1215 | if (msgpack_str_is_equal(&kv->key, name)) { | |
1216 | ret = &kv->val; | |
1217 | goto end; | |
1218 | } | |
1219 | } | |
1220 | ||
683d081a JR |
1221 | end: |
1222 | return ret; | |
1223 | } | |
1224 | ||
d602bd6a | 1225 | static void lttng_evaluation_on_event_destroy( |
683d081a JR |
1226 | struct lttng_evaluation *evaluation) |
1227 | { | |
d602bd6a | 1228 | struct lttng_evaluation_on_event *hit; |
683d081a JR |
1229 | |
1230 | hit = container_of( | |
d602bd6a | 1231 | evaluation, struct lttng_evaluation_on_event, parent); |
683d081a | 1232 | free(hit->name); |
7c920b63 PP |
1233 | lttng_dynamic_buffer_reset(&hit->capture_payload); |
1234 | lttng_event_field_value_destroy(hit->captured_values); | |
683d081a JR |
1235 | free(hit); |
1236 | } | |
1237 | ||
7c920b63 PP |
1238 | static |
1239 | int event_field_value_from_obj(const msgpack_object *obj, | |
1240 | struct lttng_event_field_value **field_val) | |
1241 | { | |
1242 | int ret = 0; | |
1243 | ||
1244 | assert(obj); | |
1245 | assert(field_val); | |
1246 | ||
1247 | switch (obj->type) { | |
1248 | case MSGPACK_OBJECT_NIL: | |
1249 | /* Unavailable. */ | |
1250 | *field_val = NULL; | |
1251 | goto end; | |
1252 | case MSGPACK_OBJECT_POSITIVE_INTEGER: | |
1253 | *field_val = lttng_event_field_value_uint_create( | |
1254 | obj->via.u64); | |
1255 | break; | |
1256 | case MSGPACK_OBJECT_NEGATIVE_INTEGER: | |
1257 | *field_val = lttng_event_field_value_int_create( | |
1258 | obj->via.i64); | |
1259 | break; | |
1260 | case MSGPACK_OBJECT_FLOAT32: | |
1261 | case MSGPACK_OBJECT_FLOAT64: | |
1262 | *field_val = lttng_event_field_value_real_create( | |
1263 | obj->via.f64); | |
1264 | break; | |
1265 | case MSGPACK_OBJECT_STR: | |
1266 | *field_val = lttng_event_field_value_string_create_with_size( | |
1267 | obj->via.str.ptr, obj->via.str.size); | |
1268 | break; | |
1269 | case MSGPACK_OBJECT_ARRAY: | |
1270 | { | |
1271 | size_t i; | |
1272 | ||
1273 | *field_val = lttng_event_field_value_array_create(); | |
1274 | if (!*field_val) { | |
1275 | goto error; | |
1276 | } | |
1277 | ||
1278 | for (i = 0; i < obj->via.array.size; i++) { | |
1279 | const msgpack_object *elem_obj = &obj->via.array.ptr[i]; | |
1280 | struct lttng_event_field_value *elem_field_val; | |
1281 | ||
1282 | ret = event_field_value_from_obj(elem_obj, | |
1283 | &elem_field_val); | |
1284 | if (ret) { | |
1285 | goto error; | |
1286 | } | |
1287 | ||
1288 | if (elem_field_val) { | |
1289 | ret = lttng_event_field_value_array_append( | |
1290 | *field_val, elem_field_val); | |
1291 | } else { | |
1292 | ret = lttng_event_field_value_array_append_unavailable( | |
1293 | *field_val); | |
1294 | } | |
1295 | ||
1296 | if (ret) { | |
1297 | lttng_event_field_value_destroy(elem_field_val); | |
1298 | goto error; | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | break; | |
1303 | } | |
1304 | case MSGPACK_OBJECT_MAP: | |
1305 | { | |
1306 | /* | |
1307 | * As of this version, the only valid map object is | |
1308 | * for an enumeration value, for example: | |
1309 | * | |
1310 | * type: enum | |
1311 | * value: 177 | |
1312 | * labels: | |
1313 | * - Labatt 50 | |
1314 | * - Molson Dry | |
1315 | * - Carling Black Label | |
1316 | */ | |
1317 | const msgpack_object *inner_obj; | |
1318 | size_t label_i; | |
1319 | ||
1320 | inner_obj = get_msgpack_map_obj(obj, "type"); | |
1321 | if (!inner_obj) { | |
1322 | ERR("Missing `type` entry in map object"); | |
1323 | goto error; | |
1324 | } | |
1325 | ||
1326 | if (inner_obj->type != MSGPACK_OBJECT_STR) { | |
1327 | ERR("Map object's `type` entry is not a string: type = %s", | |
1328 | msgpack_object_type_str(inner_obj->type)); | |
1329 | goto error; | |
1330 | } | |
1331 | ||
1332 | if (!msgpack_str_is_equal(inner_obj, "enum")) { | |
1333 | ERR("Map object's `type` entry: expecting `enum`"); | |
1334 | goto error; | |
1335 | } | |
1336 | ||
1337 | inner_obj = get_msgpack_map_obj(obj, "value"); | |
1338 | if (!inner_obj) { | |
1339 | ERR("Missing `value` entry in map object"); | |
1340 | goto error; | |
1341 | } | |
1342 | ||
1343 | if (inner_obj->type == MSGPACK_OBJECT_POSITIVE_INTEGER) { | |
1344 | *field_val = lttng_event_field_value_enum_uint_create( | |
1345 | inner_obj->via.u64); | |
1346 | } else if (inner_obj->type == MSGPACK_OBJECT_NEGATIVE_INTEGER) { | |
1347 | *field_val = lttng_event_field_value_enum_int_create( | |
1348 | inner_obj->via.i64); | |
1349 | } else { | |
1350 | ERR("Map object's `value` entry is not an integer: type = %s", | |
1351 | msgpack_object_type_str(inner_obj->type)); | |
1352 | goto error; | |
1353 | } | |
1354 | ||
1355 | if (!*field_val) { | |
1356 | goto error; | |
1357 | } | |
1358 | ||
1359 | inner_obj = get_msgpack_map_obj(obj, "labels"); | |
1360 | if (!inner_obj) { | |
1361 | /* No labels */ | |
1362 | goto end; | |
1363 | } | |
1364 | ||
1365 | if (inner_obj->type != MSGPACK_OBJECT_ARRAY) { | |
1366 | ERR("Map object's `labels` entry is not an array: type = %s", | |
1367 | msgpack_object_type_str(inner_obj->type)); | |
1368 | goto error; | |
1369 | } | |
1370 | ||
1371 | for (label_i = 0; label_i < inner_obj->via.array.size; | |
1372 | label_i++) { | |
1373 | int iret; | |
1374 | const msgpack_object *elem_obj = | |
1375 | &inner_obj->via.array.ptr[label_i]; | |
1376 | ||
1377 | if (elem_obj->type != MSGPACK_OBJECT_STR) { | |
1378 | ERR("Map object's `labels` entry's type is not a string: type = %s", | |
1379 | msgpack_object_type_str(elem_obj->type)); | |
1380 | goto error; | |
1381 | } | |
1382 | ||
1383 | iret = lttng_event_field_value_enum_append_label_with_size( | |
1384 | *field_val, elem_obj->via.str.ptr, | |
1385 | elem_obj->via.str.size); | |
1386 | if (iret) { | |
1387 | goto error; | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | break; | |
1392 | } | |
1393 | default: | |
1394 | ERR("Unexpected object type: type = %s", | |
1395 | msgpack_object_type_str(obj->type)); | |
1396 | goto error; | |
1397 | } | |
1398 | ||
1399 | if (!*field_val) { | |
1400 | goto error; | |
1401 | } | |
1402 | ||
1403 | goto end; | |
1404 | ||
1405 | error: | |
1406 | lttng_event_field_value_destroy(*field_val); | |
1407 | *field_val = NULL; | |
1408 | ret = -1; | |
1409 | ||
1410 | end: | |
1411 | return ret; | |
1412 | } | |
1413 | ||
1414 | static | |
1415 | struct lttng_event_field_value *event_field_value_from_capture_payload( | |
d602bd6a | 1416 | const struct lttng_condition_on_event *condition, |
7c920b63 PP |
1417 | const char *capture_payload, size_t capture_payload_size) |
1418 | { | |
1419 | struct lttng_event_field_value *ret = NULL; | |
1420 | msgpack_unpacked unpacked; | |
1421 | msgpack_unpack_return unpack_return; | |
1422 | const msgpack_object *root_obj; | |
1423 | const msgpack_object_array *root_array_obj; | |
1424 | size_t i; | |
1425 | size_t count; | |
1426 | ||
1427 | assert(condition); | |
1428 | assert(capture_payload); | |
1429 | ||
1430 | /* Initialize value. */ | |
1431 | msgpack_unpacked_init(&unpacked); | |
1432 | ||
1433 | /* Decode. */ | |
1434 | unpack_return = msgpack_unpack_next(&unpacked, capture_payload, | |
1435 | capture_payload_size, NULL); | |
1436 | if (unpack_return != MSGPACK_UNPACK_SUCCESS) { | |
1437 | ERR("msgpack_unpack_next() failed to decode the " | |
1438 | "MessagePack-encoded capture payload: " | |
1439 | "size = %zu, ret = %d", | |
1440 | capture_payload_size, unpack_return); | |
1441 | goto error; | |
1442 | } | |
1443 | ||
1444 | /* Get root array. */ | |
1445 | root_obj = &unpacked.data; | |
1446 | ||
1447 | if (root_obj->type != MSGPACK_OBJECT_ARRAY) { | |
1448 | ERR("Expecting an array as the root object: type = %s", | |
1449 | msgpack_object_type_str(root_obj->type)); | |
1450 | goto error; | |
1451 | } | |
1452 | ||
1453 | root_array_obj = &root_obj->via.array; | |
1454 | ||
1455 | /* Create an empty root array event field value. */ | |
1456 | ret = lttng_event_field_value_array_create(); | |
1457 | if (!ret) { | |
1458 | goto error; | |
1459 | } | |
1460 | ||
1461 | /* | |
1462 | * For each capture descriptor in the condition object: | |
1463 | * | |
1464 | * 1. Get its corresponding captured field value MessagePack | |
1465 | * object. | |
1466 | * | |
1467 | * 2. Create a corresponding event field value. | |
1468 | * | |
1469 | * 3. Append it to `ret` (the root array event field value). | |
1470 | */ | |
1471 | count = lttng_dynamic_pointer_array_get_count( | |
1472 | &condition->capture_descriptors); | |
1473 | assert(count > 0); | |
1474 | ||
1475 | for (i = 0; i < count; i++) { | |
1476 | const struct lttng_capture_descriptor *capture_descriptor = | |
d602bd6a | 1477 | lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
7c920b63 PP |
1478 | &condition->parent, i); |
1479 | const msgpack_object *elem_obj; | |
1480 | struct lttng_event_field_value *elem_field_val; | |
1481 | int iret; | |
1482 | ||
1483 | assert(capture_descriptor); | |
1484 | ||
1485 | elem_obj = &root_array_obj->ptr[i]; | |
1486 | iret = event_field_value_from_obj(elem_obj, | |
1487 | &elem_field_val); | |
1488 | if (iret) { | |
1489 | goto error; | |
1490 | } | |
1491 | ||
1492 | if (elem_field_val) { | |
1493 | iret = lttng_event_field_value_array_append(ret, | |
1494 | elem_field_val); | |
1495 | } else { | |
1496 | iret = lttng_event_field_value_array_append_unavailable( | |
1497 | ret); | |
1498 | } | |
1499 | ||
1500 | if (iret) { | |
1501 | lttng_event_field_value_destroy(elem_field_val); | |
1502 | goto error; | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | goto end; | |
1507 | ||
1508 | error: | |
1509 | lttng_event_field_value_destroy(ret); | |
1510 | ret = NULL; | |
1511 | ||
1512 | end: | |
1513 | msgpack_unpacked_destroy(&unpacked); | |
1514 | return ret; | |
1515 | } | |
1516 | ||
683d081a | 1517 | LTTNG_HIDDEN |
d602bd6a JR |
1518 | struct lttng_evaluation *lttng_evaluation_on_event_create( |
1519 | const struct lttng_condition_on_event *condition, | |
7c920b63 PP |
1520 | const char *trigger_name, |
1521 | const char *capture_payload, size_t capture_payload_size, | |
1522 | bool decode_capture_payload) | |
683d081a | 1523 | { |
d602bd6a | 1524 | struct lttng_evaluation_on_event *hit; |
683d081a JR |
1525 | struct lttng_evaluation *evaluation = NULL; |
1526 | ||
d602bd6a | 1527 | hit = zmalloc(sizeof(struct lttng_evaluation_on_event)); |
683d081a | 1528 | if (!hit) { |
7c920b63 | 1529 | goto error; |
683d081a JR |
1530 | } |
1531 | ||
1532 | hit->name = strdup(trigger_name); | |
1533 | if (!hit->name) { | |
7c920b63 PP |
1534 | goto error; |
1535 | } | |
1536 | ||
1537 | lttng_dynamic_buffer_init(&hit->capture_payload); | |
1538 | ||
1539 | if (capture_payload) { | |
1540 | const int ret = lttng_dynamic_buffer_append( | |
1541 | &hit->capture_payload, capture_payload, | |
1542 | capture_payload_size); | |
1543 | if (ret) { | |
1544 | ERR("Failed to initialize capture payload of event rule evaluation"); | |
1545 | goto error; | |
1546 | } | |
1547 | ||
1548 | if (decode_capture_payload) { | |
1549 | hit->captured_values = | |
1550 | event_field_value_from_capture_payload( | |
1551 | condition, | |
1552 | capture_payload, | |
1553 | capture_payload_size); | |
1554 | if (!hit->captured_values) { | |
1555 | ERR("Failed to decode the capture payload: size = %zu", | |
1556 | capture_payload_size); | |
1557 | goto error; | |
1558 | } | |
1559 | } | |
683d081a JR |
1560 | } |
1561 | ||
d602bd6a JR |
1562 | hit->parent.type = LTTNG_CONDITION_TYPE_ON_EVENT; |
1563 | hit->parent.serialize = lttng_evaluation_on_event_serialize; | |
1564 | hit->parent.destroy = lttng_evaluation_on_event_destroy; | |
683d081a JR |
1565 | |
1566 | evaluation = &hit->parent; | |
1567 | hit = NULL; | |
1568 | ||
7c920b63 | 1569 | error: |
683d081a | 1570 | if (hit) { |
d602bd6a | 1571 | lttng_evaluation_on_event_destroy(&hit->parent); |
683d081a JR |
1572 | } |
1573 | ||
1574 | return evaluation; | |
1575 | } | |
1576 | ||
3ce811ee JG |
1577 | enum lttng_evaluation_on_event_status |
1578 | lttng_evaluation_on_event_get_captured_values( | |
7c920b63 PP |
1579 | const struct lttng_evaluation *evaluation, |
1580 | const struct lttng_event_field_value **field_val) | |
1581 | { | |
d602bd6a | 1582 | struct lttng_evaluation_on_event *hit; |
3ce811ee JG |
1583 | enum lttng_evaluation_on_event_status status = |
1584 | LTTNG_EVALUATION_ON_EVENT_STATUS_OK; | |
7c920b63 | 1585 | |
d602bd6a | 1586 | if (!evaluation || !is_on_event_evaluation(evaluation) || |
7c920b63 | 1587 | !field_val) { |
3ce811ee | 1588 | status = LTTNG_EVALUATION_ON_EVENT_STATUS_INVALID; |
7c920b63 PP |
1589 | goto end; |
1590 | } | |
1591 | ||
d602bd6a | 1592 | hit = container_of(evaluation, struct lttng_evaluation_on_event, |
7c920b63 PP |
1593 | parent); |
1594 | if (!hit->captured_values) { | |
3ce811ee | 1595 | status = LTTNG_EVALUATION_ON_EVENT_STATUS_NONE; |
7c920b63 PP |
1596 | goto end; |
1597 | } | |
1598 | ||
1599 | *field_val = hit->captured_values; | |
1600 | ||
1601 | end: | |
1602 | return status; | |
1603 | } | |
1604 | ||
d602bd6a | 1605 | enum lttng_evaluation_status lttng_evaluation_on_event_get_trigger_name( |
683d081a JR |
1606 | const struct lttng_evaluation *evaluation, const char **name) |
1607 | { | |
d602bd6a | 1608 | struct lttng_evaluation_on_event *hit; |
683d081a JR |
1609 | enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; |
1610 | ||
d602bd6a | 1611 | if (!evaluation || !is_on_event_evaluation(evaluation) || !name) { |
683d081a JR |
1612 | status = LTTNG_EVALUATION_STATUS_INVALID; |
1613 | goto end; | |
1614 | } | |
1615 | ||
1616 | hit = container_of( | |
d602bd6a | 1617 | evaluation, struct lttng_evaluation_on_event, parent); |
683d081a JR |
1618 | *name = hit->name; |
1619 | end: | |
1620 | return status; | |
1621 | } | |
834966af JR |
1622 | |
1623 | LTTNG_HIDDEN | |
1624 | enum lttng_error_code | |
d602bd6a | 1625 | lttng_condition_on_event_generate_capture_descriptor_bytecode( |
834966af JR |
1626 | struct lttng_condition *condition) |
1627 | { | |
1628 | enum lttng_error_code ret; | |
1629 | enum lttng_condition_status status; | |
1630 | unsigned int capture_count, i; | |
1631 | ||
d602bd6a | 1632 | if (!condition || !IS_ON_EVENT_CONDITION(condition)) { |
834966af JR |
1633 | ret = LTTNG_ERR_FATAL; |
1634 | goto end; | |
1635 | } | |
1636 | ||
d602bd6a | 1637 | status = lttng_condition_on_event_get_capture_descriptor_count( |
834966af JR |
1638 | condition, &capture_count); |
1639 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
1640 | ret = LTTNG_ERR_FATAL; | |
1641 | goto end; | |
1642 | } | |
1643 | ||
1644 | for (i = 0; i < capture_count; i++) { | |
1645 | struct lttng_capture_descriptor *local_capture_desc = | |
d602bd6a | 1646 | lttng_condition_on_event_get_internal_capture_descriptor_at_index( |
834966af JR |
1647 | condition, i); |
1648 | ||
1649 | if (local_capture_desc == NULL) { | |
1650 | ret = LTTNG_ERR_FATAL; | |
1651 | goto end; | |
1652 | } | |
1653 | ||
1654 | /* Generate the bytecode. */ | |
1655 | status = lttng_event_expr_to_bytecode( | |
1656 | local_capture_desc->event_expression, | |
1657 | &local_capture_desc->bytecode); | |
1658 | if (status < 0 || local_capture_desc->bytecode == NULL) { | |
1659 | ret = LTTNG_ERR_INVALID_CAPTURE_EXPRESSION; | |
1660 | goto end; | |
1661 | } | |
1662 | } | |
1663 | ||
1664 | /* Everything went better than expected */ | |
1665 | ret = LTTNG_OK; | |
1666 | ||
1667 | end: | |
1668 | return ret; | |
1669 | } | |
51dbe985 JR |
1670 | |
1671 | LTTNG_HIDDEN | |
1672 | const struct lttng_bytecode * | |
d602bd6a | 1673 | lttng_condition_on_event_get_capture_bytecode_at_index( |
51dbe985 JR |
1674 | const struct lttng_condition *condition, unsigned int index) |
1675 | { | |
35a9ac41 | 1676 | const struct lttng_condition_on_event *on_event_cond = |
51dbe985 | 1677 | container_of(condition, |
d602bd6a | 1678 | const struct lttng_condition_on_event, |
51dbe985 JR |
1679 | parent); |
1680 | struct lttng_capture_descriptor *desc = NULL; | |
1681 | struct lttng_bytecode *bytecode = NULL; | |
1682 | unsigned int count; | |
1683 | enum lttng_condition_status status; | |
1684 | ||
d602bd6a | 1685 | if (!condition || !IS_ON_EVENT_CONDITION(condition)) { |
51dbe985 JR |
1686 | goto end; |
1687 | } | |
1688 | ||
d602bd6a | 1689 | status = lttng_condition_on_event_get_capture_descriptor_count( |
51dbe985 JR |
1690 | condition, &count); |
1691 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
1692 | goto end; | |
1693 | } | |
1694 | ||
1695 | if (index >= count) { | |
1696 | goto end; | |
1697 | } | |
1698 | ||
1699 | desc = lttng_dynamic_pointer_array_get_pointer( | |
35a9ac41 | 1700 | &on_event_cond->capture_descriptors, index); |
51dbe985 JR |
1701 | if (desc == NULL) { |
1702 | goto end; | |
1703 | } | |
1704 | ||
1705 | bytecode = desc->bytecode; | |
1706 | end: | |
1707 | return bytecode; | |
1708 | } |