Commit | Line | Data |
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76fcf151 | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
76fcf151 | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: LGPL-2.1-only |
76fcf151 | 5 | * |
76fcf151 JG |
6 | */ |
7 | ||
8ddd72ef JR |
8 | #include "common/compat/string.h" |
9 | #include "common/macros.h" | |
10 | #include "lttng/lttng-error.h" | |
11 | #include <assert.h> | |
12 | #include <common/buffer-view.h> | |
13 | #include <common/dynamic-array.h> | |
14 | #include <common/dynamic-buffer.h> | |
76fcf151 | 15 | #include <common/error.h> |
8ddd72ef JR |
16 | #include <common/sessiond-comm/sessiond-comm.h> |
17 | #include <common/align.h> | |
18 | #include <lttng/constant.h> | |
19 | #include <lttng/event-internal.h> | |
20 | #include <lttng/event.h> | |
21 | #include <lttng/userspace-probe-internal.h> | |
22 | #include <stdint.h> | |
23 | #include <string.h> | |
24 | ||
25 | struct event_list_element { | |
26 | struct lttng_event *event; | |
27 | struct lttng_event_exclusion *exclusions; | |
28 | char *filter_expression; | |
29 | }; | |
30 | ||
31 | static void event_list_destructor(void *ptr) | |
32 | { | |
33 | struct event_list_element *element = (struct event_list_element *) ptr; | |
34 | ||
35 | free(element->filter_expression); | |
36 | free(element->exclusions); | |
37 | lttng_event_destroy(element->event); | |
38 | free(element); | |
39 | } | |
76fcf151 | 40 | |
76fcf151 JG |
41 | struct lttng_event *lttng_event_copy(const struct lttng_event *event) |
42 | { | |
43 | struct lttng_event *new_event; | |
44 | struct lttng_event_extended *new_event_extended; | |
45 | ||
a6bc4ca9 | 46 | new_event = (lttng_event *) zmalloc(sizeof(*event)); |
76fcf151 JG |
47 | if (!new_event) { |
48 | PERROR("Error allocating event structure"); | |
49 | goto end; | |
50 | } | |
51 | ||
52 | /* Copy the content of the old event. */ | |
53 | memcpy(new_event, event, sizeof(*event)); | |
54 | ||
55 | /* | |
56 | * We need to create a new extended since the previous pointer is now | |
57 | * invalid. | |
58 | */ | |
a6bc4ca9 | 59 | new_event_extended = (lttng_event_extended *) zmalloc(sizeof(*new_event_extended)); |
76fcf151 JG |
60 | if (!new_event_extended) { |
61 | PERROR("Error allocating event extended structure"); | |
62 | goto error; | |
63 | } | |
64 | ||
65 | new_event->extended.ptr = new_event_extended; | |
66 | end: | |
67 | return new_event; | |
68 | error: | |
69 | free(new_event); | |
37750a61 | 70 | new_event = NULL; |
76fcf151 JG |
71 | goto end; |
72 | } | |
8ddd72ef JR |
73 | |
74 | static int lttng_event_probe_attr_serialize( | |
75 | const struct lttng_event_probe_attr *probe, | |
76 | struct lttng_payload *payload) | |
77 | { | |
78 | int ret; | |
79 | size_t symbol_name_len; | |
80 | struct lttng_event_probe_attr_comm comm = { 0 }; | |
81 | ||
82 | symbol_name_len = lttng_strnlen(probe->symbol_name, LTTNG_SYMBOL_NAME_LEN); | |
83 | if (symbol_name_len == LTTNG_SYMBOL_NAME_LEN) { | |
84 | /* Not null-termintated. */ | |
85 | ret = -1; | |
86 | goto end; | |
87 | } | |
88 | ||
89 | /* Include the null terminator. */ | |
90 | symbol_name_len += 1; | |
91 | ||
92 | comm.symbol_name_len = (uint32_t) symbol_name_len; | |
93 | comm.addr = probe->addr; | |
94 | comm.offset = probe->addr; | |
95 | ||
96 | ret = lttng_dynamic_buffer_append( | |
97 | &payload->buffer, &comm, sizeof(comm)); | |
98 | if (ret < 0) { | |
99 | ret = -1; | |
100 | goto end; | |
101 | } | |
102 | ||
103 | ret = lttng_dynamic_buffer_append( | |
104 | &payload->buffer, probe->symbol_name, symbol_name_len); | |
105 | end: | |
106 | return ret; | |
107 | } | |
108 | ||
109 | static int lttng_event_function_attr_serialize( | |
110 | const struct lttng_event_function_attr *function, | |
111 | struct lttng_payload *payload) | |
112 | { | |
113 | int ret; | |
114 | size_t symbol_name_len; | |
115 | struct lttng_event_function_attr_comm comm = { 0 }; | |
116 | ||
117 | symbol_name_len = lttng_strnlen(function->symbol_name, LTTNG_SYMBOL_NAME_LEN); | |
118 | if (symbol_name_len == LTTNG_SYMBOL_NAME_LEN) { | |
119 | /* Not null-termintated. */ | |
120 | ret = -1; | |
121 | goto end; | |
122 | } | |
123 | ||
124 | /* Include the null terminator. */ | |
125 | symbol_name_len += 1; | |
126 | ||
127 | comm.symbol_name_len = (uint32_t) symbol_name_len; | |
128 | ||
129 | ret = lttng_dynamic_buffer_append( | |
130 | &payload->buffer, &comm, sizeof(comm)); | |
131 | if (ret < 0) { | |
132 | ret = -1; | |
133 | goto end; | |
134 | } | |
135 | ||
136 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
137 | function->symbol_name, symbol_name_len); | |
138 | end: | |
139 | return ret; | |
140 | } | |
141 | ||
142 | static ssize_t lttng_event_probe_attr_create_from_payload( | |
143 | struct lttng_payload_view *view, | |
144 | struct lttng_event_probe_attr **probe_attr) | |
145 | { | |
146 | ssize_t ret, offset = 0; | |
147 | const struct lttng_event_probe_attr_comm *comm; | |
148 | struct lttng_event_probe_attr *local_attr = NULL; | |
149 | struct lttng_payload_view comm_view = lttng_payload_view_from_view( | |
150 | view, offset, sizeof(*comm)); | |
151 | ||
152 | if (!lttng_payload_view_is_valid(&comm_view)) { | |
153 | ret = -1; | |
154 | goto end; | |
155 | } | |
156 | ||
157 | comm = (typeof(comm)) comm_view.buffer.data; | |
158 | offset += sizeof(*comm); | |
159 | ||
160 | local_attr = (struct lttng_event_probe_attr *) zmalloc( | |
161 | sizeof(*local_attr)); | |
162 | if (local_attr == NULL) { | |
163 | ret = -1; | |
164 | goto end; | |
165 | } | |
166 | ||
167 | local_attr->addr = comm->addr; | |
168 | local_attr->offset = comm->offset; | |
169 | ||
170 | { | |
171 | const char *name; | |
172 | struct lttng_payload_view name_view = | |
173 | lttng_payload_view_from_view(view, offset, | |
174 | comm->symbol_name_len); | |
175 | ||
176 | if (!lttng_payload_view_is_valid(&name_view)) { | |
177 | ret = -1; | |
178 | goto end; | |
179 | } | |
180 | ||
181 | name = name_view.buffer.data; | |
182 | ||
183 | if (!lttng_buffer_view_contains_string(&name_view.buffer, name, | |
184 | comm->symbol_name_len)) { | |
185 | ret = -1; | |
186 | goto end; | |
187 | } | |
188 | ||
189 | ret = lttng_strncpy(local_attr->symbol_name, name, | |
190 | LTTNG_SYMBOL_NAME_LEN); | |
191 | if (ret) { | |
192 | ret = -1; | |
193 | goto end; | |
194 | } | |
195 | ||
196 | offset += comm->symbol_name_len; | |
197 | } | |
198 | ||
199 | *probe_attr = local_attr; | |
200 | local_attr = NULL; | |
201 | ret = offset; | |
202 | end: | |
9eb895d7 | 203 | free(local_attr); |
8ddd72ef JR |
204 | return ret; |
205 | } | |
206 | ||
207 | static ssize_t lttng_event_function_attr_create_from_payload( | |
208 | struct lttng_payload_view *view, | |
209 | struct lttng_event_function_attr **function_attr) | |
210 | { | |
211 | ssize_t ret, offset = 0; | |
212 | const struct lttng_event_function_attr_comm *comm; | |
213 | struct lttng_event_function_attr *local_attr = NULL; | |
214 | struct lttng_payload_view comm_view = lttng_payload_view_from_view( | |
215 | view, offset, sizeof(*comm)); | |
216 | ||
217 | if (!lttng_payload_view_is_valid(&comm_view)) { | |
218 | ret = -1; | |
219 | goto end; | |
220 | } | |
221 | ||
222 | comm = (typeof(comm)) view->buffer.data; | |
223 | offset += sizeof(*comm); | |
224 | ||
225 | local_attr = (struct lttng_event_function_attr *) zmalloc( | |
226 | sizeof(*local_attr)); | |
227 | if (local_attr == NULL) { | |
228 | ret = -1; | |
229 | goto end; | |
230 | } | |
231 | ||
232 | { | |
233 | const char *name; | |
234 | struct lttng_payload_view name_view = | |
235 | lttng_payload_view_from_view(view, offset, | |
236 | comm->symbol_name_len); | |
237 | ||
238 | if (!lttng_payload_view_is_valid(&name_view)) { | |
239 | ret = -1; | |
240 | goto end; | |
241 | } | |
242 | ||
243 | name = name_view.buffer.data; | |
244 | ||
245 | if (!lttng_buffer_view_contains_string(&name_view.buffer, name, | |
246 | comm->symbol_name_len)) { | |
247 | ret = -1; | |
248 | goto end; | |
249 | } | |
250 | ||
251 | ret = lttng_strncpy(local_attr->symbol_name, name, | |
252 | LTTNG_SYMBOL_NAME_LEN); | |
253 | if (ret) { | |
254 | ret = -1; | |
255 | goto end; | |
256 | } | |
257 | ||
258 | offset += comm->symbol_name_len; | |
259 | } | |
260 | ||
261 | *function_attr = local_attr; | |
262 | local_attr = NULL; | |
263 | ret = offset; | |
264 | end: | |
9eb895d7 | 265 | free(local_attr); |
8ddd72ef JR |
266 | return ret; |
267 | } | |
268 | ||
269 | static ssize_t lttng_event_exclusions_create_from_payload( | |
270 | struct lttng_payload_view *view, | |
271 | uint32_t count, | |
272 | struct lttng_event_exclusion **exclusions) | |
273 | { | |
274 | ssize_t ret, offset = 0; | |
275 | size_t size = (count * LTTNG_SYMBOL_NAME_LEN); | |
276 | uint32_t i; | |
277 | const struct lttng_event_exclusion_comm *comm; | |
278 | struct lttng_event_exclusion *local_exclusions; | |
279 | ||
280 | local_exclusions = (struct lttng_event_exclusion *) zmalloc( | |
281 | sizeof(struct lttng_event_exclusion) + size); | |
282 | if (!local_exclusions) { | |
283 | ret = -1; | |
284 | goto end; | |
285 | } | |
286 | ||
287 | local_exclusions->count = count; | |
288 | ||
289 | for (i = 0; i < count; i++) { | |
290 | const char *string; | |
291 | struct lttng_buffer_view string_view; | |
292 | const struct lttng_buffer_view comm_view = | |
293 | lttng_buffer_view_from_view(&view->buffer, | |
294 | offset, sizeof(*comm)); | |
295 | ||
296 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
297 | ret = -1; | |
298 | goto end; | |
299 | } | |
300 | ||
301 | comm = (typeof(comm)) comm_view.data; | |
302 | offset += sizeof(*comm); | |
303 | ||
304 | string_view = lttng_buffer_view_from_view( | |
305 | &view->buffer, offset, comm->len); | |
306 | ||
307 | if (!lttng_buffer_view_is_valid(&string_view)) { | |
308 | ret = -1; | |
309 | goto end; | |
310 | } | |
311 | ||
312 | string = string_view.data; | |
313 | ||
314 | if (!lttng_buffer_view_contains_string( | |
315 | &string_view, string, comm->len)) { | |
316 | ret = -1; | |
317 | goto end; | |
318 | } | |
319 | ||
320 | ret = lttng_strncpy(local_exclusions->names[i], | |
321 | string, LTTNG_SYMBOL_NAME_LEN); | |
322 | if (ret) { | |
323 | ret = -1; | |
324 | goto end; | |
325 | } | |
326 | ||
327 | offset += comm->len; | |
328 | } | |
329 | ||
330 | *exclusions = local_exclusions; | |
331 | local_exclusions = NULL; | |
332 | ret = offset; | |
333 | end: | |
334 | free(local_exclusions); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | ssize_t lttng_event_create_from_payload(struct lttng_payload_view *view, | |
339 | struct lttng_event **out_event, | |
340 | struct lttng_event_exclusion **out_exclusion, | |
341 | char **out_filter_expression, | |
342 | struct lttng_bytecode **out_bytecode) | |
343 | { | |
344 | ssize_t ret, offset = 0; | |
345 | struct lttng_event *local_event = NULL; | |
346 | struct lttng_event_exclusion *local_exclusions = NULL; | |
347 | struct lttng_bytecode *local_bytecode = NULL; | |
348 | char *local_filter_expression = NULL; | |
349 | const struct lttng_event_comm *event_comm; | |
350 | struct lttng_event_function_attr *local_function_attr = NULL; | |
351 | struct lttng_event_probe_attr *local_probe_attr = NULL; | |
352 | struct lttng_userspace_probe_location *local_userspace_probe_location = | |
353 | NULL; | |
354 | ||
355 | /* | |
356 | * Only event is obligatory, the other output argument are optional and | |
357 | * depends on what the caller is interested in. | |
358 | */ | |
359 | assert(out_event); | |
360 | assert(view); | |
361 | ||
362 | { | |
363 | struct lttng_payload_view comm_view = | |
364 | lttng_payload_view_from_view(view, offset, | |
365 | sizeof(*event_comm)); | |
366 | ||
367 | if (!lttng_payload_view_is_valid(&comm_view)) { | |
368 | ret = -1; | |
369 | goto end; | |
370 | } | |
371 | ||
372 | /* lttng_event_comm header */ | |
373 | event_comm = (typeof(event_comm)) comm_view.buffer.data; | |
374 | offset += sizeof(*event_comm); | |
375 | } | |
376 | ||
377 | local_event = lttng_event_create(); | |
378 | if (local_event == NULL) { | |
379 | ret = -1; | |
380 | goto end; | |
381 | } | |
382 | ||
383 | local_event->type = (enum lttng_event_type) event_comm->event_type; | |
384 | local_event->loglevel_type = (enum lttng_loglevel_type) event_comm->loglevel_type; | |
385 | local_event->loglevel = event_comm->loglevel; | |
386 | local_event->enabled = event_comm->enabled; | |
387 | local_event->pid = event_comm->pid; | |
388 | local_event->flags = (enum lttng_event_flag) event_comm->flags; | |
389 | ||
390 | { | |
391 | const char *name; | |
392 | const struct lttng_buffer_view name_view = | |
393 | lttng_buffer_view_from_view(&view->buffer, | |
394 | offset, event_comm->name_len); | |
395 | ||
396 | if (!lttng_buffer_view_is_valid(&name_view)) { | |
397 | ret = -1; | |
398 | goto end; | |
399 | } | |
400 | ||
401 | name = (const char *) name_view.data; | |
402 | ||
403 | if (!lttng_buffer_view_contains_string( | |
404 | &name_view, name, event_comm->name_len)) { | |
405 | ret = -1; | |
406 | goto end; | |
407 | } | |
408 | ||
409 | ret = lttng_strncpy( | |
410 | local_event->name, name, LTTNG_SYMBOL_NAME_LEN); | |
411 | if (ret) { | |
412 | ret = -1; | |
413 | goto end; | |
414 | } | |
415 | ||
416 | offset += event_comm->name_len; | |
417 | } | |
418 | ||
419 | /* Exclusions */ | |
420 | if (event_comm->exclusion_count == 0) { | |
421 | goto deserialize_filter_expression; | |
422 | } | |
423 | ||
424 | { | |
425 | struct lttng_payload_view exclusions_view = | |
426 | lttng_payload_view_from_view( | |
427 | view, offset, -1); | |
428 | ||
429 | if (!lttng_payload_view_is_valid(&exclusions_view)) { | |
430 | ret = -1; | |
431 | goto end; | |
432 | } | |
433 | ||
434 | ret = lttng_event_exclusions_create_from_payload(&exclusions_view, | |
435 | event_comm->exclusion_count, &local_exclusions); | |
436 | if (ret < 0) { | |
437 | ret = -1; | |
438 | goto end; | |
439 | } | |
440 | offset += ret; | |
441 | ||
442 | local_event->exclusion = 1; | |
443 | } | |
444 | ||
445 | deserialize_filter_expression: | |
446 | ||
447 | if (event_comm->filter_expression_len == 0) { | |
448 | if (event_comm->bytecode_len != 0) { | |
449 | /* | |
450 | * This is an invalid event payload. | |
451 | * | |
452 | * Filter expression without bytecode is possible but | |
453 | * not the other way around. | |
454 | * */ | |
455 | ret = -1; | |
456 | goto end; | |
457 | } | |
458 | goto deserialize_event_type_payload; | |
459 | } | |
460 | ||
461 | { | |
462 | const char *filter_expression_buffer; | |
463 | struct lttng_buffer_view filter_expression_view = | |
464 | lttng_buffer_view_from_view(&view->buffer, offset, | |
465 | event_comm->filter_expression_len); | |
466 | ||
467 | if (!lttng_buffer_view_is_valid(&filter_expression_view)) { | |
468 | ret = -1; | |
469 | goto end; | |
470 | } | |
471 | ||
472 | filter_expression_buffer = filter_expression_view.data; | |
473 | ||
474 | if (!lttng_buffer_view_contains_string(&filter_expression_view, | |
475 | filter_expression_buffer, | |
476 | event_comm->filter_expression_len)) { | |
477 | ret = -1; | |
478 | goto end; | |
479 | } | |
480 | ||
481 | local_filter_expression = lttng_strndup( | |
482 | filter_expression_buffer, | |
483 | event_comm->filter_expression_len); | |
484 | if (!local_filter_expression) { | |
485 | ret = -1; | |
486 | goto end; | |
487 | } | |
488 | ||
489 | local_event->filter = 1; | |
490 | ||
491 | offset += event_comm->filter_expression_len; | |
492 | } | |
493 | ||
494 | if (event_comm->bytecode_len == 0) { | |
495 | /* | |
496 | * Filter expression can be present but without bytecode | |
497 | * when dealing with event listing. | |
498 | */ | |
499 | goto deserialize_event_type_payload; | |
500 | } | |
501 | ||
502 | /* Bytecode */ | |
503 | { | |
504 | struct lttng_payload_view bytecode_view = | |
505 | lttng_payload_view_from_view(view, offset, | |
506 | event_comm->bytecode_len); | |
507 | ||
508 | if (!lttng_payload_view_is_valid(&bytecode_view)) { | |
509 | ret = -1; | |
510 | goto end; | |
511 | } | |
512 | ||
513 | local_bytecode = (struct lttng_bytecode *) zmalloc( | |
514 | event_comm->bytecode_len); | |
515 | if (!local_bytecode) { | |
516 | ret = -1; | |
517 | goto end; | |
518 | } | |
519 | ||
520 | memcpy(local_bytecode, bytecode_view.buffer.data, | |
521 | event_comm->bytecode_len); | |
522 | if ((local_bytecode->len + sizeof(*local_bytecode)) != | |
523 | event_comm->bytecode_len) { | |
524 | ret = -1; | |
525 | goto end; | |
526 | } | |
527 | ||
528 | offset += event_comm->bytecode_len; | |
529 | } | |
530 | ||
531 | deserialize_event_type_payload: | |
532 | /* Event type specific payload */ | |
533 | switch (local_event->type) { | |
534 | case LTTNG_EVENT_FUNCTION: | |
535 | /* Fallthrough */ | |
536 | case LTTNG_EVENT_PROBE: | |
537 | { | |
538 | struct lttng_payload_view probe_attr_view = | |
539 | lttng_payload_view_from_view(view, offset, | |
540 | event_comm->lttng_event_probe_attr_len); | |
541 | ||
542 | if (event_comm->lttng_event_probe_attr_len == 0) { | |
543 | ret = -1; | |
544 | goto end; | |
545 | } | |
546 | ||
547 | if (!lttng_payload_view_is_valid(&probe_attr_view)) { | |
548 | ret = -1; | |
549 | goto end; | |
550 | } | |
551 | ||
552 | ret = lttng_event_probe_attr_create_from_payload( | |
553 | &probe_attr_view, &local_probe_attr); | |
554 | if (ret < 0 || ret != event_comm->lttng_event_probe_attr_len) { | |
555 | ret = -1; | |
556 | goto end; | |
557 | } | |
558 | ||
559 | /* Copy to the local event. */ | |
560 | memcpy(&local_event->attr.probe, local_probe_attr, | |
561 | sizeof(local_event->attr.probe)); | |
562 | ||
563 | offset += ret; | |
564 | break; | |
565 | } | |
566 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
567 | { | |
568 | struct lttng_payload_view function_attr_view = | |
569 | lttng_payload_view_from_view(view, offset, | |
570 | event_comm->lttng_event_function_attr_len); | |
571 | ||
572 | if (event_comm->lttng_event_function_attr_len == 0) { | |
573 | ret = -1; | |
574 | goto end; | |
575 | } | |
576 | ||
577 | if (!lttng_payload_view_is_valid(&function_attr_view)) { | |
578 | ret = -1; | |
579 | goto end; | |
580 | } | |
581 | ||
582 | ret = lttng_event_function_attr_create_from_payload( | |
583 | &function_attr_view, &local_function_attr); | |
584 | if (ret < 0 || ret != event_comm->lttng_event_function_attr_len) { | |
585 | ret = -1; | |
586 | goto end; | |
587 | } | |
588 | ||
589 | /* Copy to the local event. */ | |
590 | memcpy(&local_event->attr.ftrace, local_function_attr, | |
591 | sizeof(local_event->attr.ftrace)); | |
592 | ||
593 | offset += ret; | |
594 | ||
595 | break; | |
596 | } | |
597 | case LTTNG_EVENT_USERSPACE_PROBE: | |
598 | { | |
599 | struct lttng_payload_view userspace_probe_location_view = | |
600 | lttng_payload_view_from_view(view, offset, | |
601 | event_comm->userspace_probe_location_len); | |
602 | ||
603 | if (event_comm->userspace_probe_location_len == 0) { | |
604 | ret = -1; | |
605 | goto end; | |
606 | } | |
607 | ||
608 | if (!lttng_payload_view_is_valid( | |
609 | &userspace_probe_location_view)) { | |
610 | ret = -1; | |
611 | goto end; | |
612 | } | |
613 | ||
614 | ret = lttng_userspace_probe_location_create_from_payload( | |
615 | &userspace_probe_location_view, | |
616 | &local_userspace_probe_location); | |
617 | if (ret < 0) { | |
618 | WARN("Failed to create a userspace probe location from the received buffer"); | |
619 | ret = -1; | |
620 | goto end; | |
621 | } | |
622 | ||
623 | if (ret != event_comm->userspace_probe_location_len) { | |
8899bce1 | 624 | WARN("Userspace probe location from the received buffer is not the advertised length: header length = %" PRIu32 ", payload length = %zd", event_comm->userspace_probe_location_len, ret); |
8ddd72ef JR |
625 | ret = -1; |
626 | goto end; | |
627 | } | |
628 | ||
629 | /* Attach the probe location to the event. */ | |
630 | ret = lttng_event_set_userspace_probe_location( | |
631 | local_event, local_userspace_probe_location); | |
632 | if (ret) { | |
633 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
634 | goto end; | |
635 | } | |
636 | ||
637 | /* | |
638 | * Userspace probe location object ownership transfered to the | |
639 | * event object. | |
640 | */ | |
641 | local_userspace_probe_location = NULL; | |
642 | offset += event_comm->userspace_probe_location_len; | |
643 | break; | |
644 | } | |
645 | case LTTNG_EVENT_TRACEPOINT: | |
646 | /* Fallthrough */ | |
647 | case LTTNG_EVENT_ALL: | |
648 | /* Fallthrough */ | |
649 | case LTTNG_EVENT_SYSCALL: | |
650 | /* Fallthrough */ | |
651 | case LTTNG_EVENT_NOOP: | |
652 | /* Nothing to do here */ | |
653 | break; | |
654 | default: | |
655 | ret = LTTNG_ERR_UND; | |
656 | goto end; | |
657 | break; | |
658 | } | |
659 | ||
660 | /* Transfer ownership to the caller. */ | |
661 | *out_event = local_event; | |
662 | local_event = NULL; | |
663 | ||
664 | if (out_bytecode) { | |
665 | *out_bytecode = local_bytecode; | |
666 | local_bytecode = NULL; | |
667 | } | |
668 | ||
669 | if (out_exclusion) { | |
670 | *out_exclusion = local_exclusions; | |
671 | local_exclusions = NULL; | |
672 | } | |
673 | ||
674 | if (out_filter_expression) { | |
675 | *out_filter_expression = local_filter_expression; | |
676 | local_filter_expression = NULL; | |
677 | } | |
678 | ||
679 | ret = offset; | |
680 | end: | |
681 | lttng_event_destroy(local_event); | |
682 | lttng_userspace_probe_location_destroy(local_userspace_probe_location); | |
683 | free(local_filter_expression); | |
684 | free(local_exclusions); | |
685 | free(local_bytecode); | |
686 | free(local_function_attr); | |
687 | free(local_probe_attr); | |
688 | return ret; | |
689 | } | |
690 | ||
691 | int lttng_event_serialize(const struct lttng_event *event, | |
692 | unsigned int exclusion_count, | |
693 | char **exclusion_list, | |
694 | char *filter_expression, | |
695 | size_t bytecode_len, | |
696 | struct lttng_bytecode *bytecode, | |
697 | struct lttng_payload *payload) | |
698 | { | |
699 | int ret; | |
700 | unsigned int i; | |
701 | size_t header_offset, size_before_payload; | |
702 | size_t name_len; | |
703 | struct lttng_event_comm event_comm = { 0 }; | |
704 | struct lttng_event_comm *header; | |
705 | ||
706 | assert(event); | |
707 | assert(payload); | |
708 | assert(exclusion_count == 0 || exclusion_list); | |
709 | ||
710 | /* Save the header location for later in-place header update. */ | |
711 | header_offset = payload->buffer.size; | |
712 | ||
713 | name_len = lttng_strnlen(event->name, LTTNG_SYMBOL_NAME_LEN); | |
714 | if (name_len == LTTNG_SYMBOL_NAME_LEN) { | |
715 | /* Event name is not NULL-terminated. */ | |
716 | ret = -1; | |
717 | goto end; | |
718 | } | |
719 | ||
720 | /* Add null termination. */ | |
721 | name_len += 1; | |
722 | ||
723 | if (exclusion_count > UINT32_MAX) { | |
724 | /* Possible overflow. */ | |
725 | ret = -1; | |
726 | goto end; | |
727 | } | |
728 | ||
729 | if (bytecode_len > UINT32_MAX) { | |
730 | /* Possible overflow. */ | |
731 | ret = -1; | |
732 | goto end; | |
733 | } | |
734 | ||
735 | event_comm.name_len = (uint32_t) name_len; | |
736 | event_comm.event_type = (int8_t) event->type; | |
737 | event_comm.loglevel_type = (int8_t) event->loglevel_type; | |
738 | event_comm.loglevel = (int32_t) event->loglevel; | |
739 | event_comm.enabled = (int8_t) event->enabled; | |
740 | event_comm.pid = (int32_t) event->pid; | |
741 | event_comm.exclusion_count = (uint32_t) exclusion_count; | |
742 | event_comm.bytecode_len = (uint32_t) bytecode_len; | |
743 | event_comm.flags = (int32_t) event->flags; | |
744 | ||
745 | if (filter_expression) { | |
746 | event_comm.filter_expression_len = | |
747 | strlen(filter_expression) + 1; | |
748 | } | |
749 | ||
750 | /* Header */ | |
751 | ret = lttng_dynamic_buffer_append( | |
752 | &payload->buffer, &event_comm, sizeof(event_comm)); | |
753 | if (ret) { | |
754 | goto end; | |
755 | } | |
756 | ||
757 | /* Event name */ | |
758 | ret = lttng_dynamic_buffer_append( | |
759 | &payload->buffer, event->name, name_len); | |
760 | if (ret) { | |
761 | goto end; | |
762 | } | |
763 | ||
764 | /* Exclusions */ | |
765 | for (i = 0; i < exclusion_count; i++) { | |
766 | const size_t exclusion_len = lttng_strnlen( | |
767 | *(exclusion_list + i), LTTNG_SYMBOL_NAME_LEN); | |
768 | const struct lttng_event_exclusion_comm exclusion_header = { | |
769 | .len = (uint32_t) exclusion_len + 1, | |
770 | }; | |
771 | ||
772 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
773 | /* Exclusion is not NULL-terminated. */ | |
774 | ret = -1; | |
775 | goto end; | |
776 | } | |
777 | ||
778 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
779 | &exclusion_header, sizeof(exclusion_header)); | |
780 | if (ret) { | |
781 | goto end; | |
782 | } | |
783 | ||
784 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
785 | *(exclusion_list + i), exclusion_len + 1); | |
786 | if (ret) { | |
787 | goto end; | |
788 | } | |
789 | } | |
790 | ||
791 | /* Filter expression and its bytecode */ | |
792 | if (filter_expression) { | |
793 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
794 | filter_expression, | |
795 | event_comm.filter_expression_len); | |
796 | if (ret) { | |
797 | goto end; | |
798 | } | |
799 | ||
800 | /* | |
801 | * Bytecode can be absent when we serialize to the client | |
802 | * for listing. | |
803 | */ | |
804 | if (bytecode) { | |
805 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
806 | bytecode, bytecode_len); | |
807 | if (ret) { | |
808 | goto end; | |
809 | } | |
810 | } | |
811 | } | |
812 | ||
813 | size_before_payload = payload->buffer.size; | |
814 | ||
815 | /* Event type specific payload */ | |
816 | switch (event->type) { | |
817 | case LTTNG_EVENT_FUNCTION: | |
818 | /* Fallthrough */ | |
819 | case LTTNG_EVENT_PROBE: | |
820 | ret = lttng_event_probe_attr_serialize(&event->attr.probe, payload); | |
821 | if (ret) { | |
822 | ret = -1; | |
823 | goto end; | |
824 | } | |
825 | ||
826 | header = (struct lttng_event_comm *) ((char *) payload->buffer.data + | |
827 | header_offset); | |
828 | header->lttng_event_probe_attr_len = | |
829 | payload->buffer.size - size_before_payload; | |
830 | ||
831 | break; | |
832 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
833 | ret = lttng_event_function_attr_serialize( | |
834 | &event->attr.ftrace, payload); | |
835 | if (ret) { | |
836 | ret = -1; | |
837 | goto end; | |
838 | } | |
839 | ||
840 | /* Update the lttng_event_function_attr len. */ | |
841 | header = (struct lttng_event_comm *) ((char *) payload->buffer.data + | |
842 | header_offset); | |
843 | header->lttng_event_function_attr_len = | |
844 | payload->buffer.size - size_before_payload; | |
845 | ||
846 | break; | |
847 | case LTTNG_EVENT_USERSPACE_PROBE: | |
848 | { | |
849 | const struct lttng_event_extended *ev_ext = | |
850 | (const struct lttng_event_extended *) | |
851 | event->extended.ptr; | |
852 | ||
853 | assert(event->extended.ptr); | |
854 | assert(ev_ext->probe_location); | |
855 | ||
856 | size_before_payload = payload->buffer.size; | |
857 | if (ev_ext->probe_location) { | |
858 | /* | |
859 | * lttng_userspace_probe_location_serialize returns the | |
860 | * number of bytes that were appended to the buffer. | |
861 | */ | |
862 | ret = lttng_userspace_probe_location_serialize( | |
863 | ev_ext->probe_location, payload); | |
864 | if (ret < 0) { | |
865 | goto end; | |
866 | } | |
867 | ||
868 | ret = 0; | |
869 | ||
870 | /* Update the userspace probe location len. */ | |
871 | header = (struct lttng_event_comm *) ((char *) payload->buffer.data + | |
872 | header_offset); | |
873 | header->userspace_probe_location_len = | |
874 | payload->buffer.size - size_before_payload; | |
875 | } | |
876 | break; | |
877 | } | |
878 | case LTTNG_EVENT_TRACEPOINT: | |
879 | /* Fallthrough */ | |
880 | case LTTNG_EVENT_ALL: | |
881 | /* Fallthrough */ | |
882 | default: | |
883 | /* Nothing to do here. */ | |
884 | break; | |
885 | } | |
886 | ||
887 | end: | |
888 | return ret; | |
889 | } | |
890 | ||
26e1c61f JR |
891 | static ssize_t lttng_event_context_app_populate_from_payload( |
892 | const struct lttng_payload_view *view, | |
893 | struct lttng_event_context *event_ctx) | |
894 | { | |
895 | ssize_t ret, offset = 0; | |
896 | const struct lttng_event_context_app_comm *comm; | |
897 | char *provider_name = NULL, *context_name = NULL; | |
898 | size_t provider_name_len, context_name_len; | |
899 | const struct lttng_buffer_view comm_view = lttng_buffer_view_from_view( | |
900 | &view->buffer, offset, sizeof(*comm)); | |
901 | ||
902 | assert(event_ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); | |
903 | ||
904 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
905 | ret = -1; | |
906 | goto end; | |
907 | } | |
908 | ||
909 | comm = (typeof(comm)) comm_view.data; | |
910 | offset += sizeof(*comm); | |
911 | ||
912 | provider_name_len = comm->provider_name_len; | |
913 | context_name_len = comm->ctx_name_len; | |
914 | ||
915 | if (provider_name_len == 0 || context_name_len == 0) { | |
916 | /* | |
917 | * Application provider and context names MUST | |
918 | * be provided. | |
919 | */ | |
920 | ret = -1; | |
921 | goto end; | |
922 | } | |
923 | ||
924 | { | |
925 | const char *name; | |
926 | const struct lttng_buffer_view provider_name_view = | |
927 | lttng_buffer_view_from_view(&view->buffer, | |
928 | offset, | |
929 | provider_name_len); | |
930 | ||
931 | if (!lttng_buffer_view_is_valid(&provider_name_view)) { | |
932 | ret = -1; | |
933 | goto end; | |
934 | } | |
935 | ||
936 | name = provider_name_view.data; | |
937 | ||
938 | if (!lttng_buffer_view_contains_string(&provider_name_view, | |
939 | name, provider_name_len)) { | |
940 | ret = -1; | |
941 | goto end; | |
942 | } | |
943 | ||
944 | provider_name = lttng_strndup(name, provider_name_len); | |
945 | if (!provider_name) { | |
946 | ret = -1; | |
947 | goto end; | |
948 | } | |
949 | ||
950 | offset += provider_name_len; | |
951 | } | |
952 | ||
953 | { | |
954 | const char *name; | |
955 | const struct lttng_buffer_view context_name_view = | |
956 | lttng_buffer_view_from_view( | |
957 | &view->buffer, offset, | |
958 | context_name_len); | |
959 | ||
960 | if (!lttng_buffer_view_is_valid(&context_name_view)) { | |
961 | ret = -1; | |
962 | goto end; | |
963 | } | |
964 | ||
965 | name = context_name_view.data; | |
966 | ||
967 | if (!lttng_buffer_view_contains_string(&context_name_view, name, | |
968 | context_name_len)) { | |
969 | ret = -1; | |
970 | goto end; | |
971 | } | |
972 | ||
973 | context_name = lttng_strndup(name, context_name_len); | |
974 | if (!context_name) { | |
975 | ret = -1; | |
976 | goto end; | |
977 | } | |
978 | ||
979 | offset += context_name_len; | |
980 | } | |
981 | ||
982 | /* Transfer ownership of the strings */ | |
983 | event_ctx->u.app_ctx.provider_name = provider_name; | |
984 | event_ctx->u.app_ctx.ctx_name = context_name; | |
985 | provider_name = NULL; | |
986 | context_name = NULL; | |
987 | ||
988 | ret = offset; | |
989 | end: | |
990 | free(provider_name); | |
991 | free(context_name); | |
992 | ||
993 | return ret; | |
994 | } | |
995 | ||
996 | static ssize_t lttng_event_context_perf_counter_populate_from_payload( | |
997 | const struct lttng_payload_view *view, | |
998 | struct lttng_event_context *event_ctx) | |
999 | { | |
1000 | ssize_t ret, offset = 0; | |
1001 | const struct lttng_event_context_perf_counter_comm *comm; | |
1002 | size_t name_len; | |
1003 | const struct lttng_buffer_view comm_view = lttng_buffer_view_from_view( | |
1004 | &view->buffer, offset, sizeof(*comm)); | |
1005 | ||
1006 | assert(event_ctx->ctx == LTTNG_EVENT_CONTEXT_PERF_COUNTER || | |
1007 | event_ctx->ctx == | |
1008 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER || | |
1009 | event_ctx->ctx == LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER); | |
1010 | ||
1011 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
1012 | ret = -1; | |
1013 | goto end; | |
1014 | } | |
1015 | ||
1016 | comm = (typeof(comm)) comm_view.data; | |
1017 | offset += sizeof(*comm); | |
1018 | ||
1019 | name_len = comm->name_len; | |
1020 | ||
1021 | { | |
1022 | const char *name; | |
1023 | const struct lttng_buffer_view provider_name_view = | |
1024 | lttng_buffer_view_from_view( | |
1025 | &view->buffer, offset, | |
1026 | name_len); | |
1027 | ||
1028 | if (!lttng_buffer_view_is_valid(&provider_name_view)) { | |
1029 | ret = -1; | |
1030 | goto end; | |
1031 | } | |
1032 | ||
1033 | name = provider_name_view.data; | |
1034 | ||
1035 | if (!lttng_buffer_view_contains_string( | |
1036 | &provider_name_view, name, name_len)) { | |
1037 | ret = -1; | |
1038 | goto end; | |
1039 | } | |
1040 | ||
1041 | lttng_strncpy(event_ctx->u.perf_counter.name, name, name_len); | |
1042 | offset += name_len; | |
1043 | } | |
1044 | ||
1045 | event_ctx->u.perf_counter.config = comm->config; | |
1046 | event_ctx->u.perf_counter.type = comm->type; | |
1047 | ||
1048 | ret = offset; | |
1049 | ||
1050 | end: | |
1051 | return ret; | |
1052 | } | |
1053 | ||
1054 | ssize_t lttng_event_context_create_from_payload( | |
1055 | struct lttng_payload_view *view, | |
1056 | struct lttng_event_context **event_ctx) | |
1057 | { | |
1058 | ssize_t ret, offset = 0; | |
1059 | const struct lttng_event_context_comm *comm; | |
1060 | struct lttng_event_context *local_context = NULL; | |
1061 | struct lttng_buffer_view comm_view = lttng_buffer_view_from_view( | |
1062 | &view->buffer, offset, sizeof(*comm)); | |
1063 | ||
1064 | assert(event_ctx); | |
1065 | assert(view); | |
1066 | ||
1067 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
1068 | ret = -1; | |
1069 | goto end; | |
1070 | } | |
1071 | ||
1072 | comm = (typeof(comm)) comm_view.data; | |
1073 | offset += sizeof(*comm); | |
1074 | ||
1075 | local_context = (struct lttng_event_context *) | |
1076 | zmalloc(sizeof(*local_context)); | |
1077 | if (!local_context) { | |
1078 | ret = -1; | |
1079 | goto end; | |
1080 | } | |
1081 | ||
1082 | local_context->ctx = (lttng_event_context_type) comm->type; | |
1083 | ||
1084 | { | |
1085 | struct lttng_payload_view subtype_view = | |
1086 | lttng_payload_view_from_view(view, offset, -1); | |
1087 | ||
1088 | switch (local_context->ctx) { | |
1089 | case LTTNG_EVENT_CONTEXT_APP_CONTEXT: | |
1090 | ret = lttng_event_context_app_populate_from_payload( | |
1091 | &subtype_view, local_context); | |
1092 | break; | |
1093 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
1094 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: | |
1095 | case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER: | |
1096 | ret = lttng_event_context_perf_counter_populate_from_payload( | |
1097 | &subtype_view, local_context); | |
1098 | break; | |
1099 | default: | |
1100 | /* Nothing else to deserialize. */ | |
1101 | ret = 0; | |
1102 | break; | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | if (ret < 0) { | |
1107 | goto end; | |
1108 | } | |
1109 | ||
1110 | offset += ret; | |
1111 | ||
1112 | *event_ctx = local_context; | |
1113 | local_context = NULL; | |
1114 | ret = offset; | |
1115 | ||
1116 | end: | |
1117 | free(local_context); | |
1118 | return ret; | |
1119 | } | |
1120 | ||
1121 | static int lttng_event_context_app_serialize( | |
1122 | struct lttng_event_context *context, | |
1123 | struct lttng_payload *payload) | |
1124 | { | |
1125 | int ret; | |
1126 | struct lttng_event_context_app_comm comm = { 0 }; | |
1127 | size_t provider_len, ctx_len; | |
1128 | const char *provider_name; | |
1129 | const char *ctx_name; | |
1130 | ||
1131 | assert(payload); | |
1132 | assert(context); | |
1133 | assert(context->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); | |
1134 | ||
1135 | provider_name = context->u.app_ctx.provider_name; | |
1136 | ctx_name = context->u.app_ctx.ctx_name; | |
1137 | ||
1138 | if (!provider_name || !ctx_name) { | |
1139 | ret = -LTTNG_ERR_INVALID; | |
1140 | goto end; | |
1141 | } | |
1142 | ||
1143 | provider_len = strlen(provider_name); | |
1144 | if (provider_len == 0) { | |
1145 | ret = -LTTNG_ERR_INVALID; | |
1146 | goto end; | |
1147 | } | |
1148 | ||
1149 | /* Include the null terminator. */ | |
f4f239b3 JR |
1150 | provider_len += 1; |
1151 | comm.provider_name_len = provider_len; | |
26e1c61f JR |
1152 | |
1153 | ctx_len = strlen(ctx_name); | |
1154 | if (ctx_len == 0) { | |
1155 | ret = -LTTNG_ERR_INVALID; | |
1156 | goto end; | |
1157 | } | |
1158 | ||
1159 | /* Include the null terminator. */ | |
f4f239b3 JR |
1160 | ctx_len += 1; |
1161 | comm.ctx_name_len = ctx_len; | |
26e1c61f JR |
1162 | |
1163 | /* Header */ | |
1164 | ret = lttng_dynamic_buffer_append(&payload->buffer, &comm, | |
1165 | sizeof(comm)); | |
1166 | if (ret) { | |
1167 | ret = -1; | |
1168 | goto end; | |
1169 | } | |
1170 | ||
1171 | ret = lttng_dynamic_buffer_append(&payload->buffer, provider_name, | |
1172 | provider_len); | |
1173 | if (ret) { | |
1174 | ret = -1; | |
1175 | goto end; | |
1176 | } | |
1177 | ||
1178 | ret = lttng_dynamic_buffer_append(&payload->buffer, ctx_name, | |
1179 | ctx_len); | |
1180 | if (ret) { | |
1181 | ret = -1; | |
1182 | goto end; | |
1183 | } | |
1184 | ||
1185 | end: | |
1186 | return ret; | |
1187 | } | |
1188 | ||
1189 | static int lttng_event_context_perf_counter_serialize( | |
1190 | struct lttng_event_perf_counter_ctx *context, | |
1191 | struct lttng_payload *payload) | |
1192 | { | |
1193 | int ret; | |
1194 | struct lttng_event_context_perf_counter_comm comm = { 0 }; | |
1195 | ||
1196 | assert(payload); | |
1197 | assert(context); | |
1198 | ||
1199 | comm.config = context->config; | |
1200 | comm.type = context->type; | |
1201 | comm.name_len = lttng_strnlen(context->name, LTTNG_SYMBOL_NAME_LEN); | |
1202 | ||
1203 | if (comm.name_len == LTTNG_SYMBOL_NAME_LEN) { | |
1204 | ret = -1; | |
1205 | goto end; | |
1206 | } | |
1207 | ||
1208 | /* Include the null terminator. */ | |
1209 | comm.name_len += 1; | |
1210 | ||
1211 | /* Header */ | |
1212 | ret = lttng_dynamic_buffer_append(&payload->buffer, &comm, | |
1213 | sizeof(comm)); | |
1214 | if (ret) { | |
1215 | ret = -1; | |
1216 | goto end; | |
1217 | } | |
1218 | ||
1219 | ret = lttng_dynamic_buffer_append(&payload->buffer, context->name, | |
1220 | comm.name_len); | |
1221 | if (ret) { | |
1222 | ret = -1; | |
1223 | goto end; | |
1224 | } | |
1225 | ||
1226 | end: | |
1227 | return ret; | |
1228 | } | |
1229 | ||
1230 | int lttng_event_context_serialize(struct lttng_event_context *context, | |
1231 | struct lttng_payload *payload) | |
1232 | { | |
1233 | int ret; | |
1234 | struct lttng_event_context_comm context_comm = { 0 }; | |
1235 | ||
1236 | assert(context); | |
1237 | assert(payload); | |
1238 | ||
1239 | context_comm.type = (uint32_t) context->ctx; | |
1240 | ||
1241 | /* Header */ | |
1242 | ret = lttng_dynamic_buffer_append( | |
1243 | &payload->buffer, &context_comm, sizeof(context_comm)); | |
1244 | if (ret) { | |
1245 | goto end; | |
1246 | } | |
1247 | ||
1248 | switch (context->ctx) { | |
1249 | case LTTNG_EVENT_CONTEXT_APP_CONTEXT: | |
1250 | ret = lttng_event_context_app_serialize(context, payload); | |
1251 | break; | |
1252 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
1253 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: | |
1254 | case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER: | |
1255 | ret = lttng_event_context_perf_counter_serialize( | |
1256 | &context->u.perf_counter, payload); | |
1257 | break; | |
1258 | default: | |
1259 | /* Nothing else to serialize. */ | |
1260 | break; | |
1261 | } | |
1262 | ||
1263 | if (ret) { | |
1264 | goto end; | |
1265 | } | |
1266 | ||
1267 | end: | |
1268 | return ret; | |
1269 | } | |
1270 | ||
1271 | void lttng_event_context_destroy(struct lttng_event_context *context) | |
1272 | { | |
1273 | if (!context) { | |
1274 | return; | |
1275 | } | |
1276 | ||
1277 | if (context->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
1278 | free(context->u.app_ctx.provider_name); | |
1279 | free(context->u.app_ctx.ctx_name); | |
1280 | } | |
1281 | ||
1282 | free(context); | |
1283 | } | |
1284 | ||
b2d68839 JR |
1285 | /* |
1286 | * This is a specialized populate for lttng_event_field since it ignores | |
1287 | * the extension field of the lttng_event struct and simply copies what it can | |
1288 | * to the internal struct lttng_event of a lttng_event_field. | |
1289 | */ | |
1290 | static void lttng_event_field_populate_lttng_event_from_event( | |
1291 | const struct lttng_event *src, struct lttng_event *destination) | |
1292 | { | |
1293 | memcpy(destination, src, sizeof(*destination)); | |
1294 | ||
1295 | /* Remove all possible dynamic data from the destination event rule. */ | |
1296 | destination->extended.ptr = NULL; | |
1297 | } | |
1298 | ||
1299 | ssize_t lttng_event_field_create_from_payload( | |
1300 | struct lttng_payload_view *view, | |
1301 | struct lttng_event_field **field) | |
1302 | { | |
1303 | ssize_t ret, offset = 0; | |
1304 | struct lttng_event_field *local_event_field = NULL; | |
1305 | struct lttng_event *event = NULL; | |
1306 | const struct lttng_event_field_comm *comm; | |
1307 | const char* name = NULL; | |
1308 | ||
1309 | assert(field); | |
1310 | assert(view); | |
1311 | ||
1312 | { | |
1313 | const struct lttng_buffer_view comm_view = | |
1314 | lttng_buffer_view_from_view( | |
1315 | &view->buffer, offset, | |
1316 | sizeof(*comm)); | |
1317 | ||
1318 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
1319 | ret = -1; | |
1320 | goto end; | |
1321 | } | |
1322 | ||
1323 | /* lttng_event_field_comm header */ | |
1324 | comm = (const lttng_event_field_comm *) comm_view.data; | |
1325 | offset += sizeof(*comm); | |
1326 | } | |
1327 | ||
1328 | local_event_field = (struct lttng_event_field *) | |
1329 | zmalloc(sizeof(*local_event_field)); | |
1330 | if (!local_event_field) { | |
1331 | ret = -1; | |
1332 | goto end; | |
1333 | } | |
1334 | ||
1335 | local_event_field->type = (lttng_event_field_type) comm->type; | |
1336 | local_event_field->nowrite = comm->nowrite; | |
1337 | ||
1338 | /* Field name */ | |
1339 | { | |
1340 | const struct lttng_buffer_view name_view = | |
1341 | lttng_buffer_view_from_view( | |
1342 | &view->buffer, offset, | |
1343 | comm->name_len); | |
1344 | ||
1345 | if (!lttng_buffer_view_is_valid(&name_view)) { | |
1346 | ret = -1; | |
1347 | goto end; | |
1348 | } | |
1349 | ||
1350 | name = name_view.data; | |
1351 | ||
1352 | if (!lttng_buffer_view_contains_string(&name_view, | |
1353 | name_view.data, comm->name_len)) { | |
1354 | ret = -1; | |
1355 | goto end; | |
1356 | } | |
1357 | ||
1358 | if (comm->name_len > LTTNG_SYMBOL_NAME_LEN - 1) { | |
1359 | /* Name is too long.*/ | |
1360 | ret = -1; | |
1361 | goto end; | |
1362 | } | |
1363 | ||
1364 | offset += comm->name_len; | |
1365 | } | |
1366 | ||
1367 | /* Event */ | |
1368 | { | |
1369 | struct lttng_payload_view event_view = | |
1370 | lttng_payload_view_from_view( | |
1371 | view, offset, | |
1372 | comm->event_len); | |
1373 | ||
1374 | if (!lttng_payload_view_is_valid(&event_view)) { | |
1375 | ret = -1; | |
1376 | goto end; | |
1377 | } | |
1378 | ||
1379 | ret = lttng_event_create_from_payload(&event_view, &event, NULL, | |
1380 | NULL, NULL); | |
1381 | if (ret != comm->event_len) { | |
1382 | ret = -1; | |
1383 | goto end; | |
1384 | } | |
1385 | ||
1386 | offset += ret; | |
1387 | } | |
1388 | ||
1389 | assert(name); | |
1390 | assert(event); | |
1391 | ||
1392 | if (lttng_strncpy(local_event_field->field_name, name , LTTNG_SYMBOL_NAME_LEN)) { | |
1393 | ret = -1; | |
1394 | goto end; | |
1395 | } | |
1396 | ||
1397 | lttng_event_field_populate_lttng_event_from_event( | |
1398 | event, &local_event_field->event); | |
1399 | ||
1400 | *field = local_event_field; | |
1401 | local_event_field = NULL; | |
1402 | ret = offset; | |
1403 | end: | |
1404 | lttng_event_destroy(event); | |
1405 | free(local_event_field); | |
1406 | return ret; | |
1407 | } | |
1408 | ||
1409 | int lttng_event_field_serialize(const struct lttng_event_field *field, | |
1410 | struct lttng_payload *payload) | |
1411 | { | |
1412 | int ret; | |
1413 | size_t header_offset, size_before_event; | |
1414 | size_t name_len; | |
1415 | struct lttng_event_field_comm event_field_comm = { 0 }; | |
1416 | struct lttng_event_field_comm *header; | |
1417 | ||
1418 | assert(field); | |
1419 | assert(payload); | |
1420 | ||
1421 | /* Save the header location for later in-place header update. */ | |
1422 | header_offset = payload->buffer.size; | |
1423 | ||
1424 | name_len = strnlen(field->field_name, LTTNG_SYMBOL_NAME_LEN); | |
1425 | if (name_len == LTTNG_SYMBOL_NAME_LEN) { | |
1426 | /* Event name is not NULL-terminated. */ | |
1427 | ret = -1; | |
1428 | goto end; | |
1429 | } | |
1430 | ||
1431 | /* Add null termination. */ | |
1432 | name_len += 1; | |
1433 | ||
1434 | event_field_comm.type = field->type; | |
1435 | event_field_comm.nowrite = (uint8_t)field->nowrite; | |
1436 | event_field_comm.name_len = name_len; | |
1437 | ||
1438 | /* Header */ | |
1439 | ret = lttng_dynamic_buffer_append( | |
1440 | &payload->buffer, &event_field_comm, | |
1441 | sizeof(event_field_comm)); | |
1442 | if (ret) { | |
1443 | goto end; | |
1444 | } | |
1445 | ||
1446 | /* Field name */ | |
1447 | ret = lttng_dynamic_buffer_append(&payload->buffer, field->field_name, | |
1448 | name_len); | |
1449 | if (ret) { | |
1450 | goto end; | |
1451 | } | |
1452 | ||
1453 | size_before_event = payload->buffer.size; | |
1454 | ret = lttng_event_serialize( | |
1455 | &field->event, 0, NULL, NULL, 0, 0, payload); | |
1456 | if (ret) { | |
1457 | ret = -1; | |
1458 | goto end; | |
1459 | } | |
1460 | ||
1461 | /* Update the event len. */ | |
1462 | header = (struct lttng_event_field_comm *) | |
1463 | ((char *) payload->buffer.data + | |
1464 | header_offset); | |
1465 | header->event_len = payload->buffer.size - size_before_event; | |
1466 | ||
1467 | end: | |
1468 | return ret; | |
1469 | } | |
1470 | ||
8ddd72ef JR |
1471 | static enum lttng_error_code compute_flattened_size( |
1472 | struct lttng_dynamic_pointer_array *events, size_t *size) | |
1473 | { | |
1474 | enum lttng_error_code ret_code; | |
1475 | int ret = 0; | |
1476 | size_t storage_req, event_count, i; | |
1477 | ||
1478 | assert(size); | |
1479 | assert(events); | |
1480 | ||
1481 | event_count = lttng_dynamic_pointer_array_get_count(events); | |
1482 | ||
1483 | /* The basic struct lttng_event */ | |
1484 | storage_req = event_count * sizeof(struct lttng_event); | |
1485 | ||
1486 | for (i = 0; i < event_count; i++) { | |
1487 | int probe_storage_req = 0; | |
1488 | const struct event_list_element *element = (const struct event_list_element *) | |
1489 | lttng_dynamic_pointer_array_get_pointer( | |
1490 | events, i); | |
1491 | const struct lttng_userspace_probe_location *location = NULL; | |
1492 | ||
1493 | location = lttng_event_get_userspace_probe_location( | |
1494 | element->event); | |
1495 | if (location) { | |
1496 | ret = lttng_userspace_probe_location_flatten( | |
1497 | location, NULL); | |
1498 | if (ret < 0) { | |
1499 | ret_code = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
1500 | goto end; | |
1501 | } | |
1502 | ||
1503 | probe_storage_req = ret; | |
1504 | } | |
1505 | ||
1506 | /* The struct·lttng_event_extended */ | |
1507 | storage_req += event_count * | |
1508 | sizeof(struct lttng_event_extended); | |
1509 | ||
1510 | if (element->filter_expression) { | |
1511 | storage_req += strlen(element->filter_expression) + 1; | |
1512 | } | |
1513 | ||
1514 | if (element->exclusions) { | |
1515 | storage_req += element->exclusions->count * | |
1516 | LTTNG_SYMBOL_NAME_LEN; | |
1517 | } | |
1518 | ||
1519 | /* Padding to ensure the flat probe is aligned. */ | |
1520 | storage_req = lttng_align_ceil(storage_req, sizeof(uint64_t)); | |
1521 | storage_req += probe_storage_req; | |
1522 | } | |
1523 | ||
1524 | *size = storage_req; | |
1525 | ret_code = LTTNG_OK; | |
1526 | ||
1527 | end: | |
1528 | return ret_code; | |
1529 | } | |
1530 | ||
1531 | /* | |
1532 | * Flatten a list of struct lttng_event. | |
1533 | * | |
1534 | * The buffer that is returned to the API client must contain a "flat" version | |
1535 | * of the events that are returned. In other words, all pointers within an | |
1536 | * lttng_event must point to a location within the returned buffer so that the | |
1537 | * user may free everything by simply calling free() on the returned buffer. | |
1538 | * This is needed in order to maintain API compatibility. | |
1539 | * | |
1540 | * A first pass is performed to compute the size of the buffer that must be | |
1541 | * allocated. A second pass is then performed to setup the returned events so | |
1542 | * that their members always point within the buffer. | |
1543 | * | |
1544 | * The layout of the returned buffer is as follows: | |
1545 | * - struct lttng_event[nb_events], | |
1546 | * - nb_events times the following: | |
1547 | * - struct lttng_event_extended, | |
1548 | * - filter_expression | |
1549 | * - exclusions | |
1550 | * - padding to align to 64-bits | |
1551 | * - flattened version of userspace_probe_location | |
1552 | */ | |
1553 | static enum lttng_error_code flatten_lttng_events( | |
1554 | struct lttng_dynamic_pointer_array *events, | |
1555 | struct lttng_event **flattened_events) | |
1556 | { | |
1557 | enum lttng_error_code ret_code; | |
1558 | int ret, i; | |
1559 | size_t storage_req; | |
1560 | struct lttng_dynamic_buffer local_flattened_events; | |
1561 | int nb_events; | |
1562 | ||
1563 | assert(events); | |
1564 | assert(flattened_events); | |
1565 | ||
1566 | lttng_dynamic_buffer_init(&local_flattened_events); | |
1567 | nb_events = lttng_dynamic_pointer_array_get_count(events); | |
1568 | ||
1569 | ret_code = compute_flattened_size(events, &storage_req); | |
1570 | if (ret_code != LTTNG_OK) { | |
1571 | goto end; | |
1572 | } | |
1573 | ||
1574 | /* | |
1575 | * We must ensure that "local_flattened_events" is never resized so as | |
1576 | * to preserve the validity of the flattened objects. | |
1577 | */ | |
1578 | ret = lttng_dynamic_buffer_set_capacity( | |
1579 | &local_flattened_events, storage_req); | |
1580 | if (ret) { | |
1581 | ret_code = LTTNG_ERR_NOMEM; | |
1582 | goto end; | |
1583 | } | |
1584 | ||
1585 | /* Start by laying the struct lttng_event */ | |
1586 | for (i = 0; i < nb_events; i++) { | |
1587 | const struct event_list_element *element = (const struct event_list_element *) | |
1588 | lttng_dynamic_pointer_array_get_pointer( | |
1589 | events, i); | |
1590 | ||
1591 | if (!element) { | |
1592 | ret_code = LTTNG_ERR_FATAL; | |
1593 | goto end; | |
1594 | } | |
1595 | ||
1596 | ret = lttng_dynamic_buffer_append(&local_flattened_events, | |
1597 | element->event, sizeof(struct lttng_event)); | |
1598 | if (ret) { | |
1599 | ret_code = LTTNG_ERR_NOMEM; | |
1600 | goto end; | |
1601 | } | |
1602 | } | |
1603 | ||
1604 | for (i = 0; i < nb_events; i++) { | |
1605 | const struct event_list_element *element = (const struct event_list_element *) | |
1606 | lttng_dynamic_pointer_array_get_pointer(events, i); | |
1607 | struct lttng_event *event = (struct lttng_event *) | |
1608 | (local_flattened_events.data + (sizeof(struct lttng_event) * i)); | |
1609 | struct lttng_event_extended *event_extended = | |
1610 | (struct lttng_event_extended *) | |
1611 | (local_flattened_events.data + local_flattened_events.size); | |
1612 | const struct lttng_userspace_probe_location *location = NULL; | |
1613 | ||
1614 | assert(element); | |
1615 | ||
1616 | /* Insert struct lttng_event_extended. */ | |
1617 | ret = lttng_dynamic_buffer_set_size(&local_flattened_events, | |
1618 | local_flattened_events.size + | |
1619 | sizeof(*event_extended)); | |
1620 | if (ret) { | |
1621 | ret_code = LTTNG_ERR_NOMEM; | |
1622 | goto end; | |
1623 | } | |
1624 | event->extended.ptr = event_extended; | |
1625 | ||
1626 | /* Insert filter expression. */ | |
1627 | if (element->filter_expression) { | |
1628 | const size_t len = strlen(element->filter_expression) + 1; | |
1629 | ||
1630 | event_extended->filter_expression = | |
1631 | local_flattened_events.data + | |
1632 | local_flattened_events.size; | |
1633 | ret = lttng_dynamic_buffer_append( | |
1634 | &local_flattened_events, | |
1635 | element->filter_expression, len); | |
1636 | if (ret) { | |
1637 | ret_code = LTTNG_ERR_NOMEM; | |
1638 | goto end; | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | /* Insert exclusions. */ | |
1643 | if (element->exclusions) { | |
1644 | event_extended->exclusions.count = | |
1645 | element->exclusions->count; | |
1646 | event_extended->exclusions.strings = | |
1647 | local_flattened_events.data + | |
1648 | local_flattened_events.size; | |
1649 | ||
1650 | ret = lttng_dynamic_buffer_append( | |
1651 | &local_flattened_events, | |
1652 | element->exclusions->names, | |
1653 | element->exclusions->count * | |
1654 | LTTNG_SYMBOL_NAME_LEN); | |
1655 | if (ret) { | |
1656 | ret_code = LTTNG_ERR_NOMEM; | |
1657 | goto end; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | /* Insert padding to align to 64-bits. */ | |
1662 | ret = lttng_dynamic_buffer_set_size(&local_flattened_events, | |
1663 | lttng_align_ceil(local_flattened_events.size, | |
1664 | sizeof(uint64_t))); | |
1665 | if (ret) { | |
1666 | ret_code = LTTNG_ERR_NOMEM; | |
1667 | goto end; | |
1668 | } | |
1669 | ||
1670 | location = lttng_event_get_userspace_probe_location( | |
1671 | element->event); | |
1672 | if (location) { | |
1673 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
1674 | (local_flattened_events.data + local_flattened_events.size); | |
1675 | ret = lttng_userspace_probe_location_flatten( | |
1676 | location, &local_flattened_events); | |
1677 | if (ret < 0) { | |
1678 | ret_code = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
1679 | goto end; | |
1680 | } | |
1681 | } | |
1682 | } | |
1683 | ||
1684 | /* Don't reset local_flattened_events buffer as we return its content. */ | |
1685 | *flattened_events = (struct lttng_event *) local_flattened_events.data; | |
1686 | lttng_dynamic_buffer_init(&local_flattened_events); | |
1687 | ret_code = LTTNG_OK; | |
1688 | end: | |
1689 | lttng_dynamic_buffer_reset(&local_flattened_events); | |
1690 | return ret_code; | |
1691 | } | |
1692 | ||
1693 | static enum lttng_error_code event_list_create_from_payload( | |
1694 | struct lttng_payload_view *view, | |
1695 | unsigned int count, | |
1696 | struct lttng_dynamic_pointer_array *event_list) | |
1697 | { | |
1698 | enum lttng_error_code ret_code; | |
1699 | int ret; | |
1700 | unsigned int i; | |
1701 | int offset = 0; | |
1702 | ||
1703 | assert(view); | |
1704 | assert(event_list); | |
1705 | ||
1706 | for (i = 0; i < count; i++) { | |
1707 | ssize_t event_size; | |
1708 | struct lttng_payload_view event_view = | |
1709 | lttng_payload_view_from_view(view, offset, -1); | |
1710 | struct event_list_element *element = | |
1711 | (struct event_list_element *) zmalloc(sizeof(*element)); | |
1712 | ||
1713 | if (!element) { | |
1714 | ret_code = LTTNG_ERR_NOMEM; | |
1715 | goto end; | |
1716 | } | |
1717 | ||
1718 | /* | |
1719 | * Lifetime and management of the object is now bound to the | |
1720 | * array. | |
1721 | */ | |
1722 | ret = lttng_dynamic_pointer_array_add_pointer( | |
1723 | event_list, element); | |
1724 | if (ret) { | |
1725 | event_list_destructor(element); | |
1726 | ret_code = LTTNG_ERR_NOMEM; | |
1727 | goto end; | |
1728 | } | |
1729 | ||
1730 | /* | |
1731 | * Bytecode is not transmitted on listing in any case we do not | |
1732 | * care about it. | |
1733 | */ | |
1734 | event_size = lttng_event_create_from_payload(&event_view, | |
1735 | &element->event, | |
1736 | &element->exclusions, | |
1737 | &element->filter_expression, NULL); | |
1738 | if (event_size < 0) { | |
1739 | ret_code = LTTNG_ERR_INVALID; | |
1740 | goto end; | |
1741 | } | |
1742 | ||
1743 | offset += event_size; | |
1744 | } | |
1745 | ||
1746 | if (view->buffer.size != offset) { | |
1747 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
1748 | goto end; | |
1749 | } | |
1750 | ||
1751 | ret_code = LTTNG_OK; | |
1752 | ||
1753 | end: | |
1754 | return ret_code; | |
1755 | } | |
1756 | ||
1757 | enum lttng_error_code lttng_events_create_and_flatten_from_payload( | |
1758 | struct lttng_payload_view *payload, | |
1759 | unsigned int count, | |
1760 | struct lttng_event **events) | |
1761 | { | |
1762 | enum lttng_error_code ret = LTTNG_OK; | |
1763 | struct lttng_dynamic_pointer_array local_events; | |
1764 | ||
1765 | lttng_dynamic_pointer_array_init(&local_events, event_list_destructor); | |
1766 | ||
1767 | /* Deserialize the events. */ | |
1768 | { | |
1769 | struct lttng_payload_view events_view = | |
1770 | lttng_payload_view_from_view(payload, 0, -1); | |
1771 | ||
1772 | ret = event_list_create_from_payload( | |
1773 | &events_view, count, &local_events); | |
1774 | if (ret != LTTNG_OK) { | |
1775 | goto end; | |
1776 | } | |
1777 | } | |
1778 | ||
1779 | ret = flatten_lttng_events(&local_events, events); | |
1780 | if (ret != LTTNG_OK) { | |
1781 | goto end; | |
1782 | } | |
1783 | ||
1784 | end: | |
1785 | lttng_dynamic_pointer_array_reset(&local_events); | |
1786 | return ret; | |
1787 | } | |
b2d68839 JR |
1788 | |
1789 | static enum lttng_error_code flatten_lttng_event_fields( | |
1790 | struct lttng_dynamic_pointer_array *event_fields, | |
1791 | struct lttng_event_field **flattened_event_fields) | |
1792 | { | |
1793 | int ret, i; | |
1794 | enum lttng_error_code ret_code; | |
1795 | size_t storage_req = 0; | |
1796 | struct lttng_dynamic_buffer local_flattened_event_fields; | |
1797 | int nb_event_field; | |
1798 | ||
1799 | assert(event_fields); | |
1800 | assert(flattened_event_fields); | |
1801 | ||
1802 | lttng_dynamic_buffer_init(&local_flattened_event_fields); | |
1803 | nb_event_field = lttng_dynamic_pointer_array_get_count(event_fields); | |
1804 | ||
1805 | /* | |
1806 | * Here even if the event field contains a `struct lttng_event` that | |
1807 | * could contain dynamic data, in reality it is not the case. | |
1808 | * Dynamic data is not present. Here the flattening is mostly a direct | |
1809 | * memcpy. This is less than ideal but this code is still better than | |
1810 | * direct usage of an unpacked lttng_event_field array. | |
1811 | */ | |
1812 | storage_req += sizeof(struct lttng_event_field) * nb_event_field; | |
1813 | ||
1814 | lttng_dynamic_buffer_init(&local_flattened_event_fields); | |
1815 | ||
1816 | /* | |
1817 | * We must ensure that "local_flattened_event_fields" is never resized | |
1818 | * so as to preserve the validity of the flattened objects. | |
1819 | */ | |
1820 | ret = lttng_dynamic_buffer_set_capacity( | |
1821 | &local_flattened_event_fields, storage_req); | |
1822 | if (ret) { | |
1823 | ret_code = LTTNG_ERR_NOMEM; | |
1824 | goto end; | |
1825 | } | |
1826 | ||
1827 | for (i = 0; i < nb_event_field; i++) { | |
1828 | const struct lttng_event_field *element = | |
1829 | (const struct lttng_event_field *) | |
1830 | lttng_dynamic_pointer_array_get_pointer( | |
1831 | event_fields, i); | |
1832 | ||
1833 | if (!element) { | |
1834 | ret_code = LTTNG_ERR_FATAL; | |
1835 | goto end; | |
1836 | } | |
1837 | ret = lttng_dynamic_buffer_append(&local_flattened_event_fields, | |
1838 | element, sizeof(struct lttng_event_field)); | |
1839 | if (ret) { | |
1840 | ret_code = LTTNG_ERR_NOMEM; | |
1841 | goto end; | |
1842 | } | |
1843 | } | |
1844 | ||
1845 | /* Don't reset local_flattened_channels buffer as we return its content. */ | |
1846 | *flattened_event_fields = (struct lttng_event_field *) local_flattened_event_fields.data; | |
1847 | lttng_dynamic_buffer_init(&local_flattened_event_fields); | |
1848 | ret_code = LTTNG_OK; | |
1849 | end: | |
1850 | lttng_dynamic_buffer_reset(&local_flattened_event_fields); | |
1851 | return ret_code; | |
1852 | } | |
1853 | ||
1854 | static enum lttng_error_code event_field_list_create_from_payload( | |
1855 | struct lttng_payload_view *view, | |
1856 | unsigned int count, | |
1857 | struct lttng_dynamic_pointer_array **event_field_list) | |
1858 | { | |
1859 | enum lttng_error_code ret_code; | |
1860 | int ret, offset = 0; | |
1861 | unsigned int i; | |
1862 | struct lttng_dynamic_pointer_array *list = NULL; | |
1863 | ||
1864 | assert(view); | |
1865 | assert(event_field_list); | |
1866 | ||
1867 | list = (struct lttng_dynamic_pointer_array *) zmalloc(sizeof(*list)); | |
1868 | if (!list) { | |
1869 | ret_code = LTTNG_ERR_NOMEM; | |
1870 | goto end; | |
1871 | } | |
1872 | ||
1873 | lttng_dynamic_pointer_array_init(list, free); | |
1874 | ||
1875 | for (i = 0; i < count; i++) { | |
1876 | ssize_t event_field_size; | |
1877 | struct lttng_event_field *field = NULL; | |
1878 | struct lttng_payload_view event_field_view = | |
1879 | lttng_payload_view_from_view(view, offset, -1); | |
1880 | ||
1881 | event_field_size = lttng_event_field_create_from_payload( | |
1882 | &event_field_view, &field); | |
1883 | if (event_field_size < 0) { | |
1884 | ret_code = LTTNG_ERR_INVALID; | |
1885 | goto end; | |
1886 | } | |
1887 | ||
1888 | /* Lifetime and management of the object is now bound to the array. */ | |
1889 | ret = lttng_dynamic_pointer_array_add_pointer(list, field); | |
1890 | if (ret) { | |
1891 | free(field); | |
1892 | ret_code = LTTNG_ERR_NOMEM; | |
1893 | goto end; | |
1894 | } | |
1895 | ||
1896 | offset += event_field_size; | |
1897 | } | |
1898 | ||
1899 | if (view->buffer.size != offset) { | |
1900 | ret_code = LTTNG_ERR_INVALID; | |
1901 | goto end; | |
1902 | } | |
1903 | ||
1904 | *event_field_list = list; | |
1905 | list = NULL; | |
1906 | ret_code = LTTNG_OK; | |
1907 | ||
1908 | end: | |
1909 | if (list) { | |
1910 | lttng_dynamic_pointer_array_reset(list); | |
1911 | free(list); | |
1912 | } | |
1913 | ||
1914 | return ret_code; | |
1915 | } | |
1916 | ||
1917 | enum lttng_error_code lttng_event_fields_create_and_flatten_from_payload( | |
1918 | struct lttng_payload_view *view, | |
1919 | unsigned int count, | |
1920 | struct lttng_event_field **fields) | |
1921 | { | |
1922 | enum lttng_error_code ret_code; | |
1923 | struct lttng_dynamic_pointer_array *local_event_fields = NULL; | |
1924 | ||
1925 | ret_code = event_field_list_create_from_payload( | |
1926 | view, count, &local_event_fields); | |
1927 | if (ret_code != LTTNG_OK) { | |
1928 | goto end; | |
1929 | } | |
1930 | ||
1931 | ret_code = flatten_lttng_event_fields(local_event_fields, fields); | |
1932 | if (ret_code != LTTNG_OK) { | |
1933 | goto end; | |
1934 | } | |
1935 | end: | |
1936 | if (local_event_fields) { | |
1937 | lttng_dynamic_pointer_array_reset(local_event_fields); | |
1938 | free(local_event_fields); | |
1939 | } | |
1940 | ||
1941 | return ret_code; | |
1942 | } |