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