Commit | Line | Data |
---|---|---|
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; | |
1c9a0b0e | 80 | struct lttng_event_probe_attr_comm comm = {}; |
8ddd72ef | 81 | |
2d6df81a JG |
82 | symbol_name_len = lttng_strnlen( |
83 | probe->symbol_name, sizeof(probe->symbol_name)); | |
84 | if (symbol_name_len == sizeof(probe->symbol_name)) { | |
8ddd72ef JR |
85 | /* Not null-termintated. */ |
86 | ret = -1; | |
87 | goto end; | |
88 | } | |
89 | ||
90 | /* Include the null terminator. */ | |
91 | symbol_name_len += 1; | |
92 | ||
93 | comm.symbol_name_len = (uint32_t) symbol_name_len; | |
94 | comm.addr = probe->addr; | |
95 | comm.offset = probe->addr; | |
96 | ||
97 | ret = lttng_dynamic_buffer_append( | |
98 | &payload->buffer, &comm, sizeof(comm)); | |
99 | if (ret < 0) { | |
100 | ret = -1; | |
101 | goto end; | |
102 | } | |
103 | ||
104 | ret = lttng_dynamic_buffer_append( | |
105 | &payload->buffer, probe->symbol_name, symbol_name_len); | |
106 | end: | |
107 | return ret; | |
108 | } | |
109 | ||
110 | static int lttng_event_function_attr_serialize( | |
111 | const struct lttng_event_function_attr *function, | |
112 | struct lttng_payload *payload) | |
113 | { | |
114 | int ret; | |
115 | size_t symbol_name_len; | |
116 | struct lttng_event_function_attr_comm comm = { 0 }; | |
117 | ||
2d6df81a JG |
118 | symbol_name_len = lttng_strnlen( |
119 | function->symbol_name, sizeof(function->symbol_name)); | |
120 | if (symbol_name_len == sizeof(function->symbol_name)) { | |
8ddd72ef JR |
121 | /* Not null-termintated. */ |
122 | ret = -1; | |
123 | goto end; | |
124 | } | |
125 | ||
126 | /* Include the null terminator. */ | |
127 | symbol_name_len += 1; | |
128 | ||
129 | comm.symbol_name_len = (uint32_t) symbol_name_len; | |
130 | ||
131 | ret = lttng_dynamic_buffer_append( | |
132 | &payload->buffer, &comm, sizeof(comm)); | |
133 | if (ret < 0) { | |
134 | ret = -1; | |
135 | goto end; | |
136 | } | |
137 | ||
138 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
139 | function->symbol_name, symbol_name_len); | |
140 | end: | |
141 | return ret; | |
142 | } | |
143 | ||
144 | static ssize_t lttng_event_probe_attr_create_from_payload( | |
145 | struct lttng_payload_view *view, | |
146 | struct lttng_event_probe_attr **probe_attr) | |
147 | { | |
148 | ssize_t ret, offset = 0; | |
149 | const struct lttng_event_probe_attr_comm *comm; | |
150 | struct lttng_event_probe_attr *local_attr = NULL; | |
151 | struct lttng_payload_view comm_view = lttng_payload_view_from_view( | |
152 | view, offset, sizeof(*comm)); | |
153 | ||
154 | if (!lttng_payload_view_is_valid(&comm_view)) { | |
155 | ret = -1; | |
156 | goto end; | |
157 | } | |
158 | ||
159 | comm = (typeof(comm)) comm_view.buffer.data; | |
160 | offset += sizeof(*comm); | |
161 | ||
162 | local_attr = (struct lttng_event_probe_attr *) zmalloc( | |
163 | sizeof(*local_attr)); | |
164 | if (local_attr == NULL) { | |
165 | ret = -1; | |
166 | goto end; | |
167 | } | |
168 | ||
169 | local_attr->addr = comm->addr; | |
170 | local_attr->offset = comm->offset; | |
171 | ||
172 | { | |
173 | const char *name; | |
174 | struct lttng_payload_view name_view = | |
175 | lttng_payload_view_from_view(view, offset, | |
176 | comm->symbol_name_len); | |
177 | ||
178 | if (!lttng_payload_view_is_valid(&name_view)) { | |
179 | ret = -1; | |
180 | goto end; | |
181 | } | |
182 | ||
183 | name = name_view.buffer.data; | |
184 | ||
185 | if (!lttng_buffer_view_contains_string(&name_view.buffer, name, | |
186 | comm->symbol_name_len)) { | |
187 | ret = -1; | |
188 | goto end; | |
189 | } | |
190 | ||
191 | ret = lttng_strncpy(local_attr->symbol_name, name, | |
2d6df81a | 192 | sizeof(local_attr->symbol_name)); |
8ddd72ef JR |
193 | if (ret) { |
194 | ret = -1; | |
195 | goto end; | |
196 | } | |
197 | ||
198 | offset += comm->symbol_name_len; | |
199 | } | |
200 | ||
201 | *probe_attr = local_attr; | |
202 | local_attr = NULL; | |
203 | ret = offset; | |
204 | end: | |
9eb895d7 | 205 | free(local_attr); |
8ddd72ef JR |
206 | return ret; |
207 | } | |
208 | ||
209 | static ssize_t lttng_event_function_attr_create_from_payload( | |
210 | struct lttng_payload_view *view, | |
211 | struct lttng_event_function_attr **function_attr) | |
212 | { | |
213 | ssize_t ret, offset = 0; | |
214 | const struct lttng_event_function_attr_comm *comm; | |
215 | struct lttng_event_function_attr *local_attr = NULL; | |
216 | struct lttng_payload_view comm_view = lttng_payload_view_from_view( | |
217 | view, offset, sizeof(*comm)); | |
218 | ||
219 | if (!lttng_payload_view_is_valid(&comm_view)) { | |
220 | ret = -1; | |
221 | goto end; | |
222 | } | |
223 | ||
224 | comm = (typeof(comm)) view->buffer.data; | |
225 | offset += sizeof(*comm); | |
226 | ||
227 | local_attr = (struct lttng_event_function_attr *) zmalloc( | |
228 | sizeof(*local_attr)); | |
229 | if (local_attr == NULL) { | |
230 | ret = -1; | |
231 | goto end; | |
232 | } | |
233 | ||
234 | { | |
235 | const char *name; | |
236 | struct lttng_payload_view name_view = | |
237 | lttng_payload_view_from_view(view, offset, | |
238 | comm->symbol_name_len); | |
239 | ||
240 | if (!lttng_payload_view_is_valid(&name_view)) { | |
241 | ret = -1; | |
242 | goto end; | |
243 | } | |
244 | ||
245 | name = name_view.buffer.data; | |
246 | ||
247 | if (!lttng_buffer_view_contains_string(&name_view.buffer, name, | |
248 | comm->symbol_name_len)) { | |
249 | ret = -1; | |
250 | goto end; | |
251 | } | |
252 | ||
253 | ret = lttng_strncpy(local_attr->symbol_name, name, | |
2d6df81a | 254 | sizeof(local_attr->symbol_name)); |
8ddd72ef JR |
255 | if (ret) { |
256 | ret = -1; | |
257 | goto end; | |
258 | } | |
259 | ||
260 | offset += comm->symbol_name_len; | |
261 | } | |
262 | ||
263 | *function_attr = local_attr; | |
264 | local_attr = NULL; | |
265 | ret = offset; | |
266 | end: | |
9eb895d7 | 267 | free(local_attr); |
8ddd72ef JR |
268 | return ret; |
269 | } | |
270 | ||
271 | static ssize_t lttng_event_exclusions_create_from_payload( | |
272 | struct lttng_payload_view *view, | |
273 | uint32_t count, | |
274 | struct lttng_event_exclusion **exclusions) | |
275 | { | |
276 | ssize_t ret, offset = 0; | |
277 | size_t size = (count * LTTNG_SYMBOL_NAME_LEN); | |
278 | uint32_t i; | |
279 | const struct lttng_event_exclusion_comm *comm; | |
280 | struct lttng_event_exclusion *local_exclusions; | |
281 | ||
282 | local_exclusions = (struct lttng_event_exclusion *) zmalloc( | |
283 | sizeof(struct lttng_event_exclusion) + size); | |
284 | if (!local_exclusions) { | |
285 | ret = -1; | |
286 | goto end; | |
287 | } | |
288 | ||
289 | local_exclusions->count = count; | |
290 | ||
291 | for (i = 0; i < count; i++) { | |
292 | const char *string; | |
293 | struct lttng_buffer_view string_view; | |
294 | const struct lttng_buffer_view comm_view = | |
295 | lttng_buffer_view_from_view(&view->buffer, | |
296 | offset, sizeof(*comm)); | |
297 | ||
298 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
299 | ret = -1; | |
300 | goto end; | |
301 | } | |
302 | ||
303 | comm = (typeof(comm)) comm_view.data; | |
304 | offset += sizeof(*comm); | |
305 | ||
306 | string_view = lttng_buffer_view_from_view( | |
307 | &view->buffer, offset, comm->len); | |
308 | ||
309 | if (!lttng_buffer_view_is_valid(&string_view)) { | |
310 | ret = -1; | |
311 | goto end; | |
312 | } | |
313 | ||
314 | string = string_view.data; | |
315 | ||
316 | if (!lttng_buffer_view_contains_string( | |
317 | &string_view, string, comm->len)) { | |
318 | ret = -1; | |
319 | goto end; | |
320 | } | |
321 | ||
62e6775c JG |
322 | ret = lttng_strncpy(LTTNG_EVENT_EXCLUSION_NAME_AT(local_exclusions, i), string, |
323 | sizeof(LTTNG_EVENT_EXCLUSION_NAME_AT(local_exclusions, i))); | |
8ddd72ef JR |
324 | if (ret) { |
325 | ret = -1; | |
326 | goto end; | |
327 | } | |
328 | ||
329 | offset += comm->len; | |
330 | } | |
331 | ||
332 | *exclusions = local_exclusions; | |
333 | local_exclusions = NULL; | |
334 | ret = offset; | |
335 | end: | |
336 | free(local_exclusions); | |
337 | return ret; | |
338 | } | |
339 | ||
340 | ssize_t lttng_event_create_from_payload(struct lttng_payload_view *view, | |
341 | struct lttng_event **out_event, | |
342 | struct lttng_event_exclusion **out_exclusion, | |
343 | char **out_filter_expression, | |
344 | struct lttng_bytecode **out_bytecode) | |
345 | { | |
346 | ssize_t ret, offset = 0; | |
347 | struct lttng_event *local_event = NULL; | |
348 | struct lttng_event_exclusion *local_exclusions = NULL; | |
349 | struct lttng_bytecode *local_bytecode = NULL; | |
350 | char *local_filter_expression = NULL; | |
351 | const struct lttng_event_comm *event_comm; | |
352 | struct lttng_event_function_attr *local_function_attr = NULL; | |
353 | struct lttng_event_probe_attr *local_probe_attr = NULL; | |
354 | struct lttng_userspace_probe_location *local_userspace_probe_location = | |
355 | NULL; | |
356 | ||
357 | /* | |
358 | * Only event is obligatory, the other output argument are optional and | |
359 | * depends on what the caller is interested in. | |
360 | */ | |
361 | assert(out_event); | |
362 | assert(view); | |
363 | ||
364 | { | |
365 | struct lttng_payload_view comm_view = | |
366 | lttng_payload_view_from_view(view, offset, | |
367 | sizeof(*event_comm)); | |
368 | ||
369 | if (!lttng_payload_view_is_valid(&comm_view)) { | |
370 | ret = -1; | |
371 | goto end; | |
372 | } | |
373 | ||
374 | /* lttng_event_comm header */ | |
375 | event_comm = (typeof(event_comm)) comm_view.buffer.data; | |
376 | offset += sizeof(*event_comm); | |
377 | } | |
378 | ||
379 | local_event = lttng_event_create(); | |
380 | if (local_event == NULL) { | |
381 | ret = -1; | |
382 | goto end; | |
383 | } | |
384 | ||
385 | local_event->type = (enum lttng_event_type) event_comm->event_type; | |
386 | local_event->loglevel_type = (enum lttng_loglevel_type) event_comm->loglevel_type; | |
387 | local_event->loglevel = event_comm->loglevel; | |
388 | local_event->enabled = event_comm->enabled; | |
389 | local_event->pid = event_comm->pid; | |
390 | local_event->flags = (enum lttng_event_flag) event_comm->flags; | |
391 | ||
392 | { | |
393 | const char *name; | |
394 | const struct lttng_buffer_view name_view = | |
395 | lttng_buffer_view_from_view(&view->buffer, | |
396 | offset, event_comm->name_len); | |
397 | ||
398 | if (!lttng_buffer_view_is_valid(&name_view)) { | |
399 | ret = -1; | |
400 | goto end; | |
401 | } | |
402 | ||
403 | name = (const char *) name_view.data; | |
404 | ||
405 | if (!lttng_buffer_view_contains_string( | |
406 | &name_view, name, event_comm->name_len)) { | |
407 | ret = -1; | |
408 | goto end; | |
409 | } | |
410 | ||
2d6df81a JG |
411 | ret = lttng_strncpy(local_event->name, name, |
412 | sizeof(local_event->name)); | |
8ddd72ef JR |
413 | if (ret) { |
414 | ret = -1; | |
415 | goto end; | |
416 | } | |
417 | ||
418 | offset += event_comm->name_len; | |
419 | } | |
420 | ||
421 | /* Exclusions */ | |
422 | if (event_comm->exclusion_count == 0) { | |
423 | goto deserialize_filter_expression; | |
424 | } | |
425 | ||
426 | { | |
427 | struct lttng_payload_view exclusions_view = | |
428 | lttng_payload_view_from_view( | |
429 | view, offset, -1); | |
430 | ||
431 | if (!lttng_payload_view_is_valid(&exclusions_view)) { | |
432 | ret = -1; | |
433 | goto end; | |
434 | } | |
435 | ||
436 | ret = lttng_event_exclusions_create_from_payload(&exclusions_view, | |
437 | event_comm->exclusion_count, &local_exclusions); | |
438 | if (ret < 0) { | |
439 | ret = -1; | |
440 | goto end; | |
441 | } | |
442 | offset += ret; | |
443 | ||
444 | local_event->exclusion = 1; | |
445 | } | |
446 | ||
447 | deserialize_filter_expression: | |
448 | ||
449 | if (event_comm->filter_expression_len == 0) { | |
450 | if (event_comm->bytecode_len != 0) { | |
451 | /* | |
452 | * This is an invalid event payload. | |
453 | * | |
454 | * Filter expression without bytecode is possible but | |
455 | * not the other way around. | |
456 | * */ | |
457 | ret = -1; | |
458 | goto end; | |
459 | } | |
460 | goto deserialize_event_type_payload; | |
461 | } | |
462 | ||
463 | { | |
464 | const char *filter_expression_buffer; | |
465 | struct lttng_buffer_view filter_expression_view = | |
466 | lttng_buffer_view_from_view(&view->buffer, offset, | |
467 | event_comm->filter_expression_len); | |
468 | ||
469 | if (!lttng_buffer_view_is_valid(&filter_expression_view)) { | |
470 | ret = -1; | |
471 | goto end; | |
472 | } | |
473 | ||
474 | filter_expression_buffer = filter_expression_view.data; | |
475 | ||
476 | if (!lttng_buffer_view_contains_string(&filter_expression_view, | |
477 | filter_expression_buffer, | |
478 | event_comm->filter_expression_len)) { | |
479 | ret = -1; | |
480 | goto end; | |
481 | } | |
482 | ||
483 | local_filter_expression = lttng_strndup( | |
484 | filter_expression_buffer, | |
485 | event_comm->filter_expression_len); | |
486 | if (!local_filter_expression) { | |
487 | ret = -1; | |
488 | goto end; | |
489 | } | |
490 | ||
491 | local_event->filter = 1; | |
492 | ||
493 | offset += event_comm->filter_expression_len; | |
494 | } | |
495 | ||
496 | if (event_comm->bytecode_len == 0) { | |
497 | /* | |
498 | * Filter expression can be present but without bytecode | |
499 | * when dealing with event listing. | |
500 | */ | |
501 | goto deserialize_event_type_payload; | |
502 | } | |
503 | ||
504 | /* Bytecode */ | |
505 | { | |
506 | struct lttng_payload_view bytecode_view = | |
507 | lttng_payload_view_from_view(view, offset, | |
508 | event_comm->bytecode_len); | |
509 | ||
510 | if (!lttng_payload_view_is_valid(&bytecode_view)) { | |
511 | ret = -1; | |
512 | goto end; | |
513 | } | |
514 | ||
515 | local_bytecode = (struct lttng_bytecode *) zmalloc( | |
516 | event_comm->bytecode_len); | |
517 | if (!local_bytecode) { | |
518 | ret = -1; | |
519 | goto end; | |
520 | } | |
521 | ||
522 | memcpy(local_bytecode, bytecode_view.buffer.data, | |
523 | event_comm->bytecode_len); | |
524 | if ((local_bytecode->len + sizeof(*local_bytecode)) != | |
525 | event_comm->bytecode_len) { | |
526 | ret = -1; | |
527 | goto end; | |
528 | } | |
529 | ||
530 | offset += event_comm->bytecode_len; | |
531 | } | |
532 | ||
533 | deserialize_event_type_payload: | |
534 | /* Event type specific payload */ | |
535 | switch (local_event->type) { | |
536 | case LTTNG_EVENT_FUNCTION: | |
537 | /* Fallthrough */ | |
538 | case LTTNG_EVENT_PROBE: | |
539 | { | |
540 | struct lttng_payload_view probe_attr_view = | |
541 | lttng_payload_view_from_view(view, offset, | |
542 | event_comm->lttng_event_probe_attr_len); | |
543 | ||
544 | if (event_comm->lttng_event_probe_attr_len == 0) { | |
545 | ret = -1; | |
546 | goto end; | |
547 | } | |
548 | ||
549 | if (!lttng_payload_view_is_valid(&probe_attr_view)) { | |
550 | ret = -1; | |
551 | goto end; | |
552 | } | |
553 | ||
554 | ret = lttng_event_probe_attr_create_from_payload( | |
555 | &probe_attr_view, &local_probe_attr); | |
556 | if (ret < 0 || ret != event_comm->lttng_event_probe_attr_len) { | |
557 | ret = -1; | |
558 | goto end; | |
559 | } | |
560 | ||
561 | /* Copy to the local event. */ | |
562 | memcpy(&local_event->attr.probe, local_probe_attr, | |
563 | sizeof(local_event->attr.probe)); | |
564 | ||
565 | offset += ret; | |
566 | break; | |
567 | } | |
568 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
569 | { | |
570 | struct lttng_payload_view function_attr_view = | |
571 | lttng_payload_view_from_view(view, offset, | |
572 | event_comm->lttng_event_function_attr_len); | |
573 | ||
574 | if (event_comm->lttng_event_function_attr_len == 0) { | |
575 | ret = -1; | |
576 | goto end; | |
577 | } | |
578 | ||
579 | if (!lttng_payload_view_is_valid(&function_attr_view)) { | |
580 | ret = -1; | |
581 | goto end; | |
582 | } | |
583 | ||
584 | ret = lttng_event_function_attr_create_from_payload( | |
585 | &function_attr_view, &local_function_attr); | |
586 | if (ret < 0 || ret != event_comm->lttng_event_function_attr_len) { | |
587 | ret = -1; | |
588 | goto end; | |
589 | } | |
590 | ||
591 | /* Copy to the local event. */ | |
592 | memcpy(&local_event->attr.ftrace, local_function_attr, | |
593 | sizeof(local_event->attr.ftrace)); | |
594 | ||
595 | offset += ret; | |
596 | ||
597 | break; | |
598 | } | |
599 | case LTTNG_EVENT_USERSPACE_PROBE: | |
600 | { | |
601 | struct lttng_payload_view userspace_probe_location_view = | |
602 | lttng_payload_view_from_view(view, offset, | |
603 | event_comm->userspace_probe_location_len); | |
604 | ||
605 | if (event_comm->userspace_probe_location_len == 0) { | |
606 | ret = -1; | |
607 | goto end; | |
608 | } | |
609 | ||
610 | if (!lttng_payload_view_is_valid( | |
611 | &userspace_probe_location_view)) { | |
612 | ret = -1; | |
613 | goto end; | |
614 | } | |
615 | ||
616 | ret = lttng_userspace_probe_location_create_from_payload( | |
617 | &userspace_probe_location_view, | |
618 | &local_userspace_probe_location); | |
619 | if (ret < 0) { | |
620 | WARN("Failed to create a userspace probe location from the received buffer"); | |
621 | ret = -1; | |
622 | goto end; | |
623 | } | |
624 | ||
625 | if (ret != event_comm->userspace_probe_location_len) { | |
8899bce1 | 626 | 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 |
627 | ret = -1; |
628 | goto end; | |
629 | } | |
630 | ||
631 | /* Attach the probe location to the event. */ | |
632 | ret = lttng_event_set_userspace_probe_location( | |
633 | local_event, local_userspace_probe_location); | |
634 | if (ret) { | |
635 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
636 | goto end; | |
637 | } | |
638 | ||
639 | /* | |
640 | * Userspace probe location object ownership transfered to the | |
641 | * event object. | |
642 | */ | |
643 | local_userspace_probe_location = NULL; | |
644 | offset += event_comm->userspace_probe_location_len; | |
645 | break; | |
646 | } | |
647 | case LTTNG_EVENT_TRACEPOINT: | |
648 | /* Fallthrough */ | |
649 | case LTTNG_EVENT_ALL: | |
650 | /* Fallthrough */ | |
651 | case LTTNG_EVENT_SYSCALL: | |
652 | /* Fallthrough */ | |
653 | case LTTNG_EVENT_NOOP: | |
654 | /* Nothing to do here */ | |
655 | break; | |
656 | default: | |
657 | ret = LTTNG_ERR_UND; | |
658 | goto end; | |
659 | break; | |
660 | } | |
661 | ||
662 | /* Transfer ownership to the caller. */ | |
663 | *out_event = local_event; | |
664 | local_event = NULL; | |
665 | ||
666 | if (out_bytecode) { | |
667 | *out_bytecode = local_bytecode; | |
668 | local_bytecode = NULL; | |
669 | } | |
670 | ||
671 | if (out_exclusion) { | |
672 | *out_exclusion = local_exclusions; | |
673 | local_exclusions = NULL; | |
674 | } | |
675 | ||
676 | if (out_filter_expression) { | |
677 | *out_filter_expression = local_filter_expression; | |
678 | local_filter_expression = NULL; | |
679 | } | |
680 | ||
681 | ret = offset; | |
682 | end: | |
683 | lttng_event_destroy(local_event); | |
684 | lttng_userspace_probe_location_destroy(local_userspace_probe_location); | |
685 | free(local_filter_expression); | |
686 | free(local_exclusions); | |
687 | free(local_bytecode); | |
688 | free(local_function_attr); | |
689 | free(local_probe_attr); | |
690 | return ret; | |
691 | } | |
692 | ||
693 | int lttng_event_serialize(const struct lttng_event *event, | |
694 | unsigned int exclusion_count, | |
695 | char **exclusion_list, | |
696 | char *filter_expression, | |
697 | size_t bytecode_len, | |
698 | struct lttng_bytecode *bytecode, | |
699 | struct lttng_payload *payload) | |
700 | { | |
701 | int ret; | |
702 | unsigned int i; | |
703 | size_t header_offset, size_before_payload; | |
704 | size_t name_len; | |
1c9a0b0e | 705 | struct lttng_event_comm event_comm = {}; |
8ddd72ef JR |
706 | struct lttng_event_comm *header; |
707 | ||
708 | assert(event); | |
709 | assert(payload); | |
710 | assert(exclusion_count == 0 || exclusion_list); | |
711 | ||
712 | /* Save the header location for later in-place header update. */ | |
713 | header_offset = payload->buffer.size; | |
714 | ||
2d6df81a JG |
715 | name_len = lttng_strnlen(event->name, sizeof(event->name)); |
716 | if (name_len == sizeof(event->name)) { | |
8ddd72ef JR |
717 | /* Event name is not NULL-terminated. */ |
718 | ret = -1; | |
719 | goto end; | |
720 | } | |
721 | ||
722 | /* Add null termination. */ | |
723 | name_len += 1; | |
724 | ||
725 | if (exclusion_count > UINT32_MAX) { | |
726 | /* Possible overflow. */ | |
727 | ret = -1; | |
728 | goto end; | |
729 | } | |
730 | ||
731 | if (bytecode_len > UINT32_MAX) { | |
732 | /* Possible overflow. */ | |
733 | ret = -1; | |
734 | goto end; | |
735 | } | |
736 | ||
737 | event_comm.name_len = (uint32_t) name_len; | |
738 | event_comm.event_type = (int8_t) event->type; | |
739 | event_comm.loglevel_type = (int8_t) event->loglevel_type; | |
740 | event_comm.loglevel = (int32_t) event->loglevel; | |
741 | event_comm.enabled = (int8_t) event->enabled; | |
742 | event_comm.pid = (int32_t) event->pid; | |
743 | event_comm.exclusion_count = (uint32_t) exclusion_count; | |
744 | event_comm.bytecode_len = (uint32_t) bytecode_len; | |
745 | event_comm.flags = (int32_t) event->flags; | |
746 | ||
747 | if (filter_expression) { | |
748 | event_comm.filter_expression_len = | |
749 | strlen(filter_expression) + 1; | |
750 | } | |
751 | ||
752 | /* Header */ | |
753 | ret = lttng_dynamic_buffer_append( | |
754 | &payload->buffer, &event_comm, sizeof(event_comm)); | |
755 | if (ret) { | |
756 | goto end; | |
757 | } | |
758 | ||
759 | /* Event name */ | |
760 | ret = lttng_dynamic_buffer_append( | |
761 | &payload->buffer, event->name, name_len); | |
762 | if (ret) { | |
763 | goto end; | |
764 | } | |
765 | ||
766 | /* Exclusions */ | |
767 | for (i = 0; i < exclusion_count; i++) { | |
768 | const size_t exclusion_len = lttng_strnlen( | |
769 | *(exclusion_list + i), LTTNG_SYMBOL_NAME_LEN); | |
770 | const struct lttng_event_exclusion_comm exclusion_header = { | |
771 | .len = (uint32_t) exclusion_len + 1, | |
772 | }; | |
773 | ||
774 | if (exclusion_len == LTTNG_SYMBOL_NAME_LEN) { | |
775 | /* Exclusion is not NULL-terminated. */ | |
776 | ret = -1; | |
777 | goto end; | |
778 | } | |
779 | ||
780 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
781 | &exclusion_header, sizeof(exclusion_header)); | |
782 | if (ret) { | |
783 | goto end; | |
784 | } | |
785 | ||
786 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
787 | *(exclusion_list + i), exclusion_len + 1); | |
788 | if (ret) { | |
789 | goto end; | |
790 | } | |
791 | } | |
792 | ||
793 | /* Filter expression and its bytecode */ | |
794 | if (filter_expression) { | |
795 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
796 | filter_expression, | |
797 | event_comm.filter_expression_len); | |
798 | if (ret) { | |
799 | goto end; | |
800 | } | |
801 | ||
802 | /* | |
803 | * Bytecode can be absent when we serialize to the client | |
804 | * for listing. | |
805 | */ | |
806 | if (bytecode) { | |
807 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
808 | bytecode, bytecode_len); | |
809 | if (ret) { | |
810 | goto end; | |
811 | } | |
812 | } | |
813 | } | |
814 | ||
815 | size_before_payload = payload->buffer.size; | |
816 | ||
817 | /* Event type specific payload */ | |
818 | switch (event->type) { | |
819 | case LTTNG_EVENT_FUNCTION: | |
820 | /* Fallthrough */ | |
821 | case LTTNG_EVENT_PROBE: | |
822 | ret = lttng_event_probe_attr_serialize(&event->attr.probe, payload); | |
823 | if (ret) { | |
824 | ret = -1; | |
825 | goto end; | |
826 | } | |
827 | ||
828 | header = (struct lttng_event_comm *) ((char *) payload->buffer.data + | |
829 | header_offset); | |
830 | header->lttng_event_probe_attr_len = | |
831 | payload->buffer.size - size_before_payload; | |
832 | ||
833 | break; | |
834 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
835 | ret = lttng_event_function_attr_serialize( | |
836 | &event->attr.ftrace, payload); | |
837 | if (ret) { | |
838 | ret = -1; | |
839 | goto end; | |
840 | } | |
841 | ||
842 | /* Update the lttng_event_function_attr len. */ | |
843 | header = (struct lttng_event_comm *) ((char *) payload->buffer.data + | |
844 | header_offset); | |
845 | header->lttng_event_function_attr_len = | |
846 | payload->buffer.size - size_before_payload; | |
847 | ||
848 | break; | |
849 | case LTTNG_EVENT_USERSPACE_PROBE: | |
850 | { | |
851 | const struct lttng_event_extended *ev_ext = | |
852 | (const struct lttng_event_extended *) | |
853 | event->extended.ptr; | |
854 | ||
855 | assert(event->extended.ptr); | |
856 | assert(ev_ext->probe_location); | |
857 | ||
858 | size_before_payload = payload->buffer.size; | |
859 | if (ev_ext->probe_location) { | |
860 | /* | |
861 | * lttng_userspace_probe_location_serialize returns the | |
862 | * number of bytes that were appended to the buffer. | |
863 | */ | |
864 | ret = lttng_userspace_probe_location_serialize( | |
865 | ev_ext->probe_location, payload); | |
866 | if (ret < 0) { | |
867 | goto end; | |
868 | } | |
869 | ||
870 | ret = 0; | |
871 | ||
872 | /* Update the userspace probe location len. */ | |
873 | header = (struct lttng_event_comm *) ((char *) payload->buffer.data + | |
874 | header_offset); | |
875 | header->userspace_probe_location_len = | |
876 | payload->buffer.size - size_before_payload; | |
877 | } | |
878 | break; | |
879 | } | |
880 | case LTTNG_EVENT_TRACEPOINT: | |
881 | /* Fallthrough */ | |
882 | case LTTNG_EVENT_ALL: | |
883 | /* Fallthrough */ | |
884 | default: | |
885 | /* Nothing to do here. */ | |
886 | break; | |
887 | } | |
888 | ||
889 | end: | |
890 | return ret; | |
891 | } | |
892 | ||
26e1c61f JR |
893 | static ssize_t lttng_event_context_app_populate_from_payload( |
894 | const struct lttng_payload_view *view, | |
895 | struct lttng_event_context *event_ctx) | |
896 | { | |
897 | ssize_t ret, offset = 0; | |
898 | const struct lttng_event_context_app_comm *comm; | |
899 | char *provider_name = NULL, *context_name = NULL; | |
900 | size_t provider_name_len, context_name_len; | |
901 | const struct lttng_buffer_view comm_view = lttng_buffer_view_from_view( | |
902 | &view->buffer, offset, sizeof(*comm)); | |
903 | ||
904 | assert(event_ctx->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); | |
905 | ||
906 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
907 | ret = -1; | |
908 | goto end; | |
909 | } | |
910 | ||
911 | comm = (typeof(comm)) comm_view.data; | |
912 | offset += sizeof(*comm); | |
913 | ||
914 | provider_name_len = comm->provider_name_len; | |
915 | context_name_len = comm->ctx_name_len; | |
916 | ||
917 | if (provider_name_len == 0 || context_name_len == 0) { | |
918 | /* | |
919 | * Application provider and context names MUST | |
920 | * be provided. | |
921 | */ | |
922 | ret = -1; | |
923 | goto end; | |
924 | } | |
925 | ||
926 | { | |
927 | const char *name; | |
928 | const struct lttng_buffer_view provider_name_view = | |
929 | lttng_buffer_view_from_view(&view->buffer, | |
930 | offset, | |
931 | provider_name_len); | |
932 | ||
933 | if (!lttng_buffer_view_is_valid(&provider_name_view)) { | |
934 | ret = -1; | |
935 | goto end; | |
936 | } | |
937 | ||
938 | name = provider_name_view.data; | |
939 | ||
940 | if (!lttng_buffer_view_contains_string(&provider_name_view, | |
941 | name, provider_name_len)) { | |
942 | ret = -1; | |
943 | goto end; | |
944 | } | |
945 | ||
946 | provider_name = lttng_strndup(name, provider_name_len); | |
947 | if (!provider_name) { | |
948 | ret = -1; | |
949 | goto end; | |
950 | } | |
951 | ||
952 | offset += provider_name_len; | |
953 | } | |
954 | ||
955 | { | |
956 | const char *name; | |
957 | const struct lttng_buffer_view context_name_view = | |
958 | lttng_buffer_view_from_view( | |
959 | &view->buffer, offset, | |
960 | context_name_len); | |
961 | ||
962 | if (!lttng_buffer_view_is_valid(&context_name_view)) { | |
963 | ret = -1; | |
964 | goto end; | |
965 | } | |
966 | ||
967 | name = context_name_view.data; | |
968 | ||
969 | if (!lttng_buffer_view_contains_string(&context_name_view, name, | |
970 | context_name_len)) { | |
971 | ret = -1; | |
972 | goto end; | |
973 | } | |
974 | ||
975 | context_name = lttng_strndup(name, context_name_len); | |
976 | if (!context_name) { | |
977 | ret = -1; | |
978 | goto end; | |
979 | } | |
980 | ||
981 | offset += context_name_len; | |
982 | } | |
983 | ||
984 | /* Transfer ownership of the strings */ | |
985 | event_ctx->u.app_ctx.provider_name = provider_name; | |
986 | event_ctx->u.app_ctx.ctx_name = context_name; | |
987 | provider_name = NULL; | |
988 | context_name = NULL; | |
989 | ||
990 | ret = offset; | |
991 | end: | |
992 | free(provider_name); | |
993 | free(context_name); | |
994 | ||
995 | return ret; | |
996 | } | |
997 | ||
998 | static ssize_t lttng_event_context_perf_counter_populate_from_payload( | |
999 | const struct lttng_payload_view *view, | |
1000 | struct lttng_event_context *event_ctx) | |
1001 | { | |
531e96a7 JR |
1002 | int ret; |
1003 | ssize_t consumed, offset = 0; | |
26e1c61f JR |
1004 | const struct lttng_event_context_perf_counter_comm *comm; |
1005 | size_t name_len; | |
1006 | const struct lttng_buffer_view comm_view = lttng_buffer_view_from_view( | |
1007 | &view->buffer, offset, sizeof(*comm)); | |
1008 | ||
1009 | assert(event_ctx->ctx == LTTNG_EVENT_CONTEXT_PERF_COUNTER || | |
1010 | event_ctx->ctx == | |
1011 | LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER || | |
1012 | event_ctx->ctx == LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER); | |
1013 | ||
1014 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
531e96a7 | 1015 | consumed = -1; |
26e1c61f JR |
1016 | goto end; |
1017 | } | |
1018 | ||
1019 | comm = (typeof(comm)) comm_view.data; | |
1020 | offset += sizeof(*comm); | |
1021 | ||
1022 | name_len = comm->name_len; | |
1023 | ||
1024 | { | |
1025 | const char *name; | |
1026 | const struct lttng_buffer_view provider_name_view = | |
1027 | lttng_buffer_view_from_view( | |
1028 | &view->buffer, offset, | |
1029 | name_len); | |
1030 | ||
1031 | if (!lttng_buffer_view_is_valid(&provider_name_view)) { | |
531e96a7 | 1032 | consumed = -1; |
26e1c61f JR |
1033 | goto end; |
1034 | } | |
1035 | ||
1036 | name = provider_name_view.data; | |
1037 | ||
1038 | if (!lttng_buffer_view_contains_string( | |
1039 | &provider_name_view, name, name_len)) { | |
531e96a7 | 1040 | consumed = -1; |
26e1c61f JR |
1041 | goto end; |
1042 | } | |
1043 | ||
97f9ed7d JG |
1044 | ret = lttng_strncpy(event_ctx->u.perf_counter.name, name, |
1045 | sizeof(event_ctx->u.perf_counter.name)); | |
531e96a7 JR |
1046 | if (ret) { |
1047 | consumed = -1; | |
1048 | goto end; | |
1049 | } | |
26e1c61f JR |
1050 | offset += name_len; |
1051 | } | |
1052 | ||
1053 | event_ctx->u.perf_counter.config = comm->config; | |
1054 | event_ctx->u.perf_counter.type = comm->type; | |
1055 | ||
531e96a7 | 1056 | consumed = offset; |
26e1c61f JR |
1057 | |
1058 | end: | |
531e96a7 | 1059 | return consumed; |
26e1c61f JR |
1060 | } |
1061 | ||
1062 | ssize_t lttng_event_context_create_from_payload( | |
1063 | struct lttng_payload_view *view, | |
1064 | struct lttng_event_context **event_ctx) | |
1065 | { | |
1066 | ssize_t ret, offset = 0; | |
1067 | const struct lttng_event_context_comm *comm; | |
1068 | struct lttng_event_context *local_context = NULL; | |
1069 | struct lttng_buffer_view comm_view = lttng_buffer_view_from_view( | |
1070 | &view->buffer, offset, sizeof(*comm)); | |
1071 | ||
1072 | assert(event_ctx); | |
1073 | assert(view); | |
1074 | ||
1075 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
1076 | ret = -1; | |
1077 | goto end; | |
1078 | } | |
1079 | ||
1080 | comm = (typeof(comm)) comm_view.data; | |
1081 | offset += sizeof(*comm); | |
1082 | ||
1083 | local_context = (struct lttng_event_context *) | |
1084 | zmalloc(sizeof(*local_context)); | |
1085 | if (!local_context) { | |
1086 | ret = -1; | |
1087 | goto end; | |
1088 | } | |
1089 | ||
1090 | local_context->ctx = (lttng_event_context_type) comm->type; | |
1091 | ||
1092 | { | |
1093 | struct lttng_payload_view subtype_view = | |
1094 | lttng_payload_view_from_view(view, offset, -1); | |
1095 | ||
1096 | switch (local_context->ctx) { | |
1097 | case LTTNG_EVENT_CONTEXT_APP_CONTEXT: | |
1098 | ret = lttng_event_context_app_populate_from_payload( | |
1099 | &subtype_view, local_context); | |
1100 | break; | |
1101 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
1102 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: | |
1103 | case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER: | |
1104 | ret = lttng_event_context_perf_counter_populate_from_payload( | |
1105 | &subtype_view, local_context); | |
1106 | break; | |
1107 | default: | |
1108 | /* Nothing else to deserialize. */ | |
1109 | ret = 0; | |
1110 | break; | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | if (ret < 0) { | |
1115 | goto end; | |
1116 | } | |
1117 | ||
1118 | offset += ret; | |
1119 | ||
1120 | *event_ctx = local_context; | |
1121 | local_context = NULL; | |
1122 | ret = offset; | |
1123 | ||
1124 | end: | |
1125 | free(local_context); | |
1126 | return ret; | |
1127 | } | |
1128 | ||
1129 | static int lttng_event_context_app_serialize( | |
1130 | struct lttng_event_context *context, | |
1131 | struct lttng_payload *payload) | |
1132 | { | |
1133 | int ret; | |
1c9a0b0e | 1134 | struct lttng_event_context_app_comm comm = {}; |
26e1c61f JR |
1135 | size_t provider_len, ctx_len; |
1136 | const char *provider_name; | |
1137 | const char *ctx_name; | |
1138 | ||
1139 | assert(payload); | |
1140 | assert(context); | |
1141 | assert(context->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT); | |
1142 | ||
1143 | provider_name = context->u.app_ctx.provider_name; | |
1144 | ctx_name = context->u.app_ctx.ctx_name; | |
1145 | ||
1146 | if (!provider_name || !ctx_name) { | |
1147 | ret = -LTTNG_ERR_INVALID; | |
1148 | goto end; | |
1149 | } | |
1150 | ||
1151 | provider_len = strlen(provider_name); | |
1152 | if (provider_len == 0) { | |
1153 | ret = -LTTNG_ERR_INVALID; | |
1154 | goto end; | |
1155 | } | |
1156 | ||
1157 | /* Include the null terminator. */ | |
f4f239b3 JR |
1158 | provider_len += 1; |
1159 | comm.provider_name_len = provider_len; | |
26e1c61f JR |
1160 | |
1161 | ctx_len = strlen(ctx_name); | |
1162 | if (ctx_len == 0) { | |
1163 | ret = -LTTNG_ERR_INVALID; | |
1164 | goto end; | |
1165 | } | |
1166 | ||
1167 | /* Include the null terminator. */ | |
f4f239b3 JR |
1168 | ctx_len += 1; |
1169 | comm.ctx_name_len = ctx_len; | |
26e1c61f JR |
1170 | |
1171 | /* Header */ | |
1172 | ret = lttng_dynamic_buffer_append(&payload->buffer, &comm, | |
1173 | sizeof(comm)); | |
1174 | if (ret) { | |
1175 | ret = -1; | |
1176 | goto end; | |
1177 | } | |
1178 | ||
1179 | ret = lttng_dynamic_buffer_append(&payload->buffer, provider_name, | |
1180 | provider_len); | |
1181 | if (ret) { | |
1182 | ret = -1; | |
1183 | goto end; | |
1184 | } | |
1185 | ||
1186 | ret = lttng_dynamic_buffer_append(&payload->buffer, ctx_name, | |
1187 | ctx_len); | |
1188 | if (ret) { | |
1189 | ret = -1; | |
1190 | goto end; | |
1191 | } | |
1192 | ||
1193 | end: | |
1194 | return ret; | |
1195 | } | |
1196 | ||
1197 | static int lttng_event_context_perf_counter_serialize( | |
1198 | struct lttng_event_perf_counter_ctx *context, | |
1199 | struct lttng_payload *payload) | |
1200 | { | |
1201 | int ret; | |
1c9a0b0e | 1202 | struct lttng_event_context_perf_counter_comm comm = {}; |
26e1c61f JR |
1203 | |
1204 | assert(payload); | |
1205 | assert(context); | |
1206 | ||
1207 | comm.config = context->config; | |
1208 | comm.type = context->type; | |
2d6df81a | 1209 | comm.name_len = lttng_strnlen(context->name, sizeof(context->name)); |
26e1c61f | 1210 | |
2d6df81a | 1211 | if (comm.name_len == sizeof(context->name)) { |
26e1c61f JR |
1212 | ret = -1; |
1213 | goto end; | |
1214 | } | |
1215 | ||
1216 | /* Include the null terminator. */ | |
1217 | comm.name_len += 1; | |
1218 | ||
1219 | /* Header */ | |
1220 | ret = lttng_dynamic_buffer_append(&payload->buffer, &comm, | |
1221 | sizeof(comm)); | |
1222 | if (ret) { | |
1223 | ret = -1; | |
1224 | goto end; | |
1225 | } | |
1226 | ||
1227 | ret = lttng_dynamic_buffer_append(&payload->buffer, context->name, | |
1228 | comm.name_len); | |
1229 | if (ret) { | |
1230 | ret = -1; | |
1231 | goto end; | |
1232 | } | |
1233 | ||
1234 | end: | |
1235 | return ret; | |
1236 | } | |
1237 | ||
1238 | int lttng_event_context_serialize(struct lttng_event_context *context, | |
1239 | struct lttng_payload *payload) | |
1240 | { | |
1241 | int ret; | |
1242 | struct lttng_event_context_comm context_comm = { 0 }; | |
1243 | ||
1244 | assert(context); | |
1245 | assert(payload); | |
1246 | ||
1247 | context_comm.type = (uint32_t) context->ctx; | |
1248 | ||
1249 | /* Header */ | |
1250 | ret = lttng_dynamic_buffer_append( | |
1251 | &payload->buffer, &context_comm, sizeof(context_comm)); | |
1252 | if (ret) { | |
1253 | goto end; | |
1254 | } | |
1255 | ||
1256 | switch (context->ctx) { | |
1257 | case LTTNG_EVENT_CONTEXT_APP_CONTEXT: | |
1258 | ret = lttng_event_context_app_serialize(context, payload); | |
1259 | break; | |
1260 | case LTTNG_EVENT_CONTEXT_PERF_COUNTER: | |
1261 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: | |
1262 | case LTTNG_EVENT_CONTEXT_PERF_CPU_COUNTER: | |
1263 | ret = lttng_event_context_perf_counter_serialize( | |
1264 | &context->u.perf_counter, payload); | |
1265 | break; | |
1266 | default: | |
1267 | /* Nothing else to serialize. */ | |
1268 | break; | |
1269 | } | |
1270 | ||
1271 | if (ret) { | |
1272 | goto end; | |
1273 | } | |
1274 | ||
1275 | end: | |
1276 | return ret; | |
1277 | } | |
1278 | ||
1279 | void lttng_event_context_destroy(struct lttng_event_context *context) | |
1280 | { | |
1281 | if (!context) { | |
1282 | return; | |
1283 | } | |
1284 | ||
1285 | if (context->ctx == LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
1286 | free(context->u.app_ctx.provider_name); | |
1287 | free(context->u.app_ctx.ctx_name); | |
1288 | } | |
1289 | ||
1290 | free(context); | |
1291 | } | |
1292 | ||
b2d68839 JR |
1293 | /* |
1294 | * This is a specialized populate for lttng_event_field since it ignores | |
1295 | * the extension field of the lttng_event struct and simply copies what it can | |
1296 | * to the internal struct lttng_event of a lttng_event_field. | |
1297 | */ | |
1298 | static void lttng_event_field_populate_lttng_event_from_event( | |
1299 | const struct lttng_event *src, struct lttng_event *destination) | |
1300 | { | |
1301 | memcpy(destination, src, sizeof(*destination)); | |
1302 | ||
1303 | /* Remove all possible dynamic data from the destination event rule. */ | |
1304 | destination->extended.ptr = NULL; | |
1305 | } | |
1306 | ||
1307 | ssize_t lttng_event_field_create_from_payload( | |
1308 | struct lttng_payload_view *view, | |
1309 | struct lttng_event_field **field) | |
1310 | { | |
1311 | ssize_t ret, offset = 0; | |
1312 | struct lttng_event_field *local_event_field = NULL; | |
1313 | struct lttng_event *event = NULL; | |
1314 | const struct lttng_event_field_comm *comm; | |
1315 | const char* name = NULL; | |
1316 | ||
1317 | assert(field); | |
1318 | assert(view); | |
1319 | ||
1320 | { | |
1321 | const struct lttng_buffer_view comm_view = | |
1322 | lttng_buffer_view_from_view( | |
1323 | &view->buffer, offset, | |
1324 | sizeof(*comm)); | |
1325 | ||
1326 | if (!lttng_buffer_view_is_valid(&comm_view)) { | |
1327 | ret = -1; | |
1328 | goto end; | |
1329 | } | |
1330 | ||
1331 | /* lttng_event_field_comm header */ | |
1332 | comm = (const lttng_event_field_comm *) comm_view.data; | |
1333 | offset += sizeof(*comm); | |
1334 | } | |
1335 | ||
1336 | local_event_field = (struct lttng_event_field *) | |
1337 | zmalloc(sizeof(*local_event_field)); | |
1338 | if (!local_event_field) { | |
1339 | ret = -1; | |
1340 | goto end; | |
1341 | } | |
1342 | ||
1343 | local_event_field->type = (lttng_event_field_type) comm->type; | |
1344 | local_event_field->nowrite = comm->nowrite; | |
1345 | ||
1346 | /* Field name */ | |
1347 | { | |
1348 | const struct lttng_buffer_view name_view = | |
1349 | lttng_buffer_view_from_view( | |
1350 | &view->buffer, offset, | |
1351 | comm->name_len); | |
1352 | ||
1353 | if (!lttng_buffer_view_is_valid(&name_view)) { | |
1354 | ret = -1; | |
1355 | goto end; | |
1356 | } | |
1357 | ||
1358 | name = name_view.data; | |
1359 | ||
1360 | if (!lttng_buffer_view_contains_string(&name_view, | |
1361 | name_view.data, comm->name_len)) { | |
1362 | ret = -1; | |
1363 | goto end; | |
1364 | } | |
1365 | ||
1366 | if (comm->name_len > LTTNG_SYMBOL_NAME_LEN - 1) { | |
1367 | /* Name is too long.*/ | |
1368 | ret = -1; | |
1369 | goto end; | |
1370 | } | |
1371 | ||
1372 | offset += comm->name_len; | |
1373 | } | |
1374 | ||
1375 | /* Event */ | |
1376 | { | |
1377 | struct lttng_payload_view event_view = | |
1378 | lttng_payload_view_from_view( | |
1379 | view, offset, | |
1380 | comm->event_len); | |
1381 | ||
1382 | if (!lttng_payload_view_is_valid(&event_view)) { | |
1383 | ret = -1; | |
1384 | goto end; | |
1385 | } | |
1386 | ||
1387 | ret = lttng_event_create_from_payload(&event_view, &event, NULL, | |
1388 | NULL, NULL); | |
1389 | if (ret != comm->event_len) { | |
1390 | ret = -1; | |
1391 | goto end; | |
1392 | } | |
1393 | ||
1394 | offset += ret; | |
1395 | } | |
1396 | ||
1397 | assert(name); | |
1398 | assert(event); | |
1399 | ||
2d6df81a JG |
1400 | if (lttng_strncpy(local_event_field->field_name, name, |
1401 | sizeof(local_event_field->field_name))) { | |
b2d68839 JR |
1402 | ret = -1; |
1403 | goto end; | |
1404 | } | |
1405 | ||
1406 | lttng_event_field_populate_lttng_event_from_event( | |
1407 | event, &local_event_field->event); | |
1408 | ||
1409 | *field = local_event_field; | |
1410 | local_event_field = NULL; | |
1411 | ret = offset; | |
1412 | end: | |
1413 | lttng_event_destroy(event); | |
1414 | free(local_event_field); | |
1415 | return ret; | |
1416 | } | |
1417 | ||
1418 | int lttng_event_field_serialize(const struct lttng_event_field *field, | |
1419 | struct lttng_payload *payload) | |
1420 | { | |
1421 | int ret; | |
1422 | size_t header_offset, size_before_event; | |
1423 | size_t name_len; | |
1c9a0b0e | 1424 | struct lttng_event_field_comm event_field_comm = {}; |
b2d68839 JR |
1425 | struct lttng_event_field_comm *header; |
1426 | ||
1427 | assert(field); | |
1428 | assert(payload); | |
1429 | ||
1430 | /* Save the header location for later in-place header update. */ | |
1431 | header_offset = payload->buffer.size; | |
1432 | ||
2d6df81a JG |
1433 | name_len = strnlen(field->field_name, sizeof(field->field_name)); |
1434 | if (name_len == sizeof(field->field_name)) { | |
b2d68839 JR |
1435 | /* Event name is not NULL-terminated. */ |
1436 | ret = -1; | |
1437 | goto end; | |
1438 | } | |
1439 | ||
1440 | /* Add null termination. */ | |
1441 | name_len += 1; | |
1442 | ||
1443 | event_field_comm.type = field->type; | |
1444 | event_field_comm.nowrite = (uint8_t)field->nowrite; | |
1445 | event_field_comm.name_len = name_len; | |
1446 | ||
1447 | /* Header */ | |
1448 | ret = lttng_dynamic_buffer_append( | |
1449 | &payload->buffer, &event_field_comm, | |
1450 | sizeof(event_field_comm)); | |
1451 | if (ret) { | |
1452 | goto end; | |
1453 | } | |
1454 | ||
1455 | /* Field name */ | |
1456 | ret = lttng_dynamic_buffer_append(&payload->buffer, field->field_name, | |
1457 | name_len); | |
1458 | if (ret) { | |
1459 | goto end; | |
1460 | } | |
1461 | ||
1462 | size_before_event = payload->buffer.size; | |
1463 | ret = lttng_event_serialize( | |
1464 | &field->event, 0, NULL, NULL, 0, 0, payload); | |
1465 | if (ret) { | |
1466 | ret = -1; | |
1467 | goto end; | |
1468 | } | |
1469 | ||
1470 | /* Update the event len. */ | |
1471 | header = (struct lttng_event_field_comm *) | |
1472 | ((char *) payload->buffer.data + | |
1473 | header_offset); | |
1474 | header->event_len = payload->buffer.size - size_before_event; | |
1475 | ||
1476 | end: | |
1477 | return ret; | |
1478 | } | |
1479 | ||
8ddd72ef JR |
1480 | static enum lttng_error_code compute_flattened_size( |
1481 | struct lttng_dynamic_pointer_array *events, size_t *size) | |
1482 | { | |
1483 | enum lttng_error_code ret_code; | |
1484 | int ret = 0; | |
1485 | size_t storage_req, event_count, i; | |
1486 | ||
1487 | assert(size); | |
1488 | assert(events); | |
1489 | ||
1490 | event_count = lttng_dynamic_pointer_array_get_count(events); | |
1491 | ||
1492 | /* The basic struct lttng_event */ | |
1493 | storage_req = event_count * sizeof(struct lttng_event); | |
1494 | ||
fc33156e JG |
1495 | /* The struct·lttng_event_extended */ |
1496 | storage_req += event_count * sizeof(struct lttng_event_extended); | |
1497 | ||
8ddd72ef JR |
1498 | for (i = 0; i < event_count; i++) { |
1499 | int probe_storage_req = 0; | |
1500 | const struct event_list_element *element = (const struct event_list_element *) | |
1501 | lttng_dynamic_pointer_array_get_pointer( | |
1502 | events, i); | |
1503 | const struct lttng_userspace_probe_location *location = NULL; | |
1504 | ||
1505 | location = lttng_event_get_userspace_probe_location( | |
1506 | element->event); | |
1507 | if (location) { | |
1508 | ret = lttng_userspace_probe_location_flatten( | |
1509 | location, NULL); | |
1510 | if (ret < 0) { | |
1511 | ret_code = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
1512 | goto end; | |
1513 | } | |
1514 | ||
1515 | probe_storage_req = ret; | |
1516 | } | |
1517 | ||
8ddd72ef JR |
1518 | if (element->filter_expression) { |
1519 | storage_req += strlen(element->filter_expression) + 1; | |
1520 | } | |
1521 | ||
1522 | if (element->exclusions) { | |
1523 | storage_req += element->exclusions->count * | |
1524 | LTTNG_SYMBOL_NAME_LEN; | |
1525 | } | |
1526 | ||
1527 | /* Padding to ensure the flat probe is aligned. */ | |
1528 | storage_req = lttng_align_ceil(storage_req, sizeof(uint64_t)); | |
1529 | storage_req += probe_storage_req; | |
1530 | } | |
1531 | ||
1532 | *size = storage_req; | |
1533 | ret_code = LTTNG_OK; | |
1534 | ||
1535 | end: | |
1536 | return ret_code; | |
1537 | } | |
1538 | ||
1539 | /* | |
1540 | * Flatten a list of struct lttng_event. | |
1541 | * | |
1542 | * The buffer that is returned to the API client must contain a "flat" version | |
1543 | * of the events that are returned. In other words, all pointers within an | |
1544 | * lttng_event must point to a location within the returned buffer so that the | |
1545 | * user may free everything by simply calling free() on the returned buffer. | |
1546 | * This is needed in order to maintain API compatibility. | |
1547 | * | |
1548 | * A first pass is performed to compute the size of the buffer that must be | |
1549 | * allocated. A second pass is then performed to setup the returned events so | |
1550 | * that their members always point within the buffer. | |
1551 | * | |
1552 | * The layout of the returned buffer is as follows: | |
1553 | * - struct lttng_event[nb_events], | |
1554 | * - nb_events times the following: | |
1555 | * - struct lttng_event_extended, | |
1556 | * - filter_expression | |
1557 | * - exclusions | |
1558 | * - padding to align to 64-bits | |
1559 | * - flattened version of userspace_probe_location | |
1560 | */ | |
1561 | static enum lttng_error_code flatten_lttng_events( | |
1562 | struct lttng_dynamic_pointer_array *events, | |
1563 | struct lttng_event **flattened_events) | |
1564 | { | |
1565 | enum lttng_error_code ret_code; | |
1566 | int ret, i; | |
1567 | size_t storage_req; | |
1568 | struct lttng_dynamic_buffer local_flattened_events; | |
1569 | int nb_events; | |
1570 | ||
1571 | assert(events); | |
1572 | assert(flattened_events); | |
1573 | ||
1574 | lttng_dynamic_buffer_init(&local_flattened_events); | |
1575 | nb_events = lttng_dynamic_pointer_array_get_count(events); | |
1576 | ||
1577 | ret_code = compute_flattened_size(events, &storage_req); | |
1578 | if (ret_code != LTTNG_OK) { | |
1579 | goto end; | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | * We must ensure that "local_flattened_events" is never resized so as | |
1584 | * to preserve the validity of the flattened objects. | |
1585 | */ | |
1586 | ret = lttng_dynamic_buffer_set_capacity( | |
1587 | &local_flattened_events, storage_req); | |
1588 | if (ret) { | |
1589 | ret_code = LTTNG_ERR_NOMEM; | |
1590 | goto end; | |
1591 | } | |
1592 | ||
1593 | /* Start by laying the struct lttng_event */ | |
1594 | for (i = 0; i < nb_events; i++) { | |
1595 | const struct event_list_element *element = (const struct event_list_element *) | |
1596 | lttng_dynamic_pointer_array_get_pointer( | |
1597 | events, i); | |
1598 | ||
1599 | if (!element) { | |
1600 | ret_code = LTTNG_ERR_FATAL; | |
1601 | goto end; | |
1602 | } | |
1603 | ||
1604 | ret = lttng_dynamic_buffer_append(&local_flattened_events, | |
1605 | element->event, sizeof(struct lttng_event)); | |
1606 | if (ret) { | |
1607 | ret_code = LTTNG_ERR_NOMEM; | |
1608 | goto end; | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | for (i = 0; i < nb_events; i++) { | |
1613 | const struct event_list_element *element = (const struct event_list_element *) | |
1614 | lttng_dynamic_pointer_array_get_pointer(events, i); | |
1615 | struct lttng_event *event = (struct lttng_event *) | |
1616 | (local_flattened_events.data + (sizeof(struct lttng_event) * i)); | |
1617 | struct lttng_event_extended *event_extended = | |
1618 | (struct lttng_event_extended *) | |
1619 | (local_flattened_events.data + local_flattened_events.size); | |
1620 | const struct lttng_userspace_probe_location *location = NULL; | |
1621 | ||
1622 | assert(element); | |
1623 | ||
1624 | /* Insert struct lttng_event_extended. */ | |
1625 | ret = lttng_dynamic_buffer_set_size(&local_flattened_events, | |
1626 | local_flattened_events.size + | |
1627 | sizeof(*event_extended)); | |
1628 | if (ret) { | |
1629 | ret_code = LTTNG_ERR_NOMEM; | |
1630 | goto end; | |
1631 | } | |
1632 | event->extended.ptr = event_extended; | |
1633 | ||
1634 | /* Insert filter expression. */ | |
1635 | if (element->filter_expression) { | |
1636 | const size_t len = strlen(element->filter_expression) + 1; | |
1637 | ||
1638 | event_extended->filter_expression = | |
1639 | local_flattened_events.data + | |
1640 | local_flattened_events.size; | |
1641 | ret = lttng_dynamic_buffer_append( | |
1642 | &local_flattened_events, | |
1643 | element->filter_expression, len); | |
1644 | if (ret) { | |
1645 | ret_code = LTTNG_ERR_NOMEM; | |
1646 | goto end; | |
1647 | } | |
1648 | } | |
1649 | ||
1650 | /* Insert exclusions. */ | |
1651 | if (element->exclusions) { | |
1652 | event_extended->exclusions.count = | |
1653 | element->exclusions->count; | |
1654 | event_extended->exclusions.strings = | |
1655 | local_flattened_events.data + | |
1656 | local_flattened_events.size; | |
1657 | ||
1658 | ret = lttng_dynamic_buffer_append( | |
1659 | &local_flattened_events, | |
1660 | element->exclusions->names, | |
1661 | element->exclusions->count * | |
1662 | LTTNG_SYMBOL_NAME_LEN); | |
1663 | if (ret) { | |
1664 | ret_code = LTTNG_ERR_NOMEM; | |
1665 | goto end; | |
1666 | } | |
1667 | } | |
1668 | ||
1669 | /* Insert padding to align to 64-bits. */ | |
1670 | ret = lttng_dynamic_buffer_set_size(&local_flattened_events, | |
1671 | lttng_align_ceil(local_flattened_events.size, | |
1672 | sizeof(uint64_t))); | |
1673 | if (ret) { | |
1674 | ret_code = LTTNG_ERR_NOMEM; | |
1675 | goto end; | |
1676 | } | |
1677 | ||
1678 | location = lttng_event_get_userspace_probe_location( | |
1679 | element->event); | |
1680 | if (location) { | |
1681 | event_extended->probe_location = (struct lttng_userspace_probe_location *) | |
1682 | (local_flattened_events.data + local_flattened_events.size); | |
1683 | ret = lttng_userspace_probe_location_flatten( | |
1684 | location, &local_flattened_events); | |
1685 | if (ret < 0) { | |
1686 | ret_code = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
1687 | goto end; | |
1688 | } | |
1689 | } | |
1690 | } | |
1691 | ||
1692 | /* Don't reset local_flattened_events buffer as we return its content. */ | |
1693 | *flattened_events = (struct lttng_event *) local_flattened_events.data; | |
1694 | lttng_dynamic_buffer_init(&local_flattened_events); | |
1695 | ret_code = LTTNG_OK; | |
1696 | end: | |
1697 | lttng_dynamic_buffer_reset(&local_flattened_events); | |
1698 | return ret_code; | |
1699 | } | |
1700 | ||
1701 | static enum lttng_error_code event_list_create_from_payload( | |
1702 | struct lttng_payload_view *view, | |
1703 | unsigned int count, | |
1704 | struct lttng_dynamic_pointer_array *event_list) | |
1705 | { | |
1706 | enum lttng_error_code ret_code; | |
1707 | int ret; | |
1708 | unsigned int i; | |
1709 | int offset = 0; | |
1710 | ||
1711 | assert(view); | |
1712 | assert(event_list); | |
1713 | ||
1714 | for (i = 0; i < count; i++) { | |
1715 | ssize_t event_size; | |
1716 | struct lttng_payload_view event_view = | |
1717 | lttng_payload_view_from_view(view, offset, -1); | |
1718 | struct event_list_element *element = | |
1719 | (struct event_list_element *) zmalloc(sizeof(*element)); | |
1720 | ||
1721 | if (!element) { | |
1722 | ret_code = LTTNG_ERR_NOMEM; | |
1723 | goto end; | |
1724 | } | |
1725 | ||
1726 | /* | |
1727 | * Lifetime and management of the object is now bound to the | |
1728 | * array. | |
1729 | */ | |
1730 | ret = lttng_dynamic_pointer_array_add_pointer( | |
1731 | event_list, element); | |
1732 | if (ret) { | |
1733 | event_list_destructor(element); | |
1734 | ret_code = LTTNG_ERR_NOMEM; | |
1735 | goto end; | |
1736 | } | |
1737 | ||
1738 | /* | |
1739 | * Bytecode is not transmitted on listing in any case we do not | |
1740 | * care about it. | |
1741 | */ | |
1742 | event_size = lttng_event_create_from_payload(&event_view, | |
1743 | &element->event, | |
1744 | &element->exclusions, | |
1745 | &element->filter_expression, NULL); | |
1746 | if (event_size < 0) { | |
1747 | ret_code = LTTNG_ERR_INVALID; | |
1748 | goto end; | |
1749 | } | |
1750 | ||
1751 | offset += event_size; | |
1752 | } | |
1753 | ||
1754 | if (view->buffer.size != offset) { | |
1755 | ret_code = LTTNG_ERR_INVALID_PROTOCOL; | |
1756 | goto end; | |
1757 | } | |
1758 | ||
1759 | ret_code = LTTNG_OK; | |
1760 | ||
1761 | end: | |
1762 | return ret_code; | |
1763 | } | |
1764 | ||
1765 | enum lttng_error_code lttng_events_create_and_flatten_from_payload( | |
1766 | struct lttng_payload_view *payload, | |
1767 | unsigned int count, | |
1768 | struct lttng_event **events) | |
1769 | { | |
1770 | enum lttng_error_code ret = LTTNG_OK; | |
1771 | struct lttng_dynamic_pointer_array local_events; | |
1772 | ||
1773 | lttng_dynamic_pointer_array_init(&local_events, event_list_destructor); | |
1774 | ||
1775 | /* Deserialize the events. */ | |
1776 | { | |
1777 | struct lttng_payload_view events_view = | |
1778 | lttng_payload_view_from_view(payload, 0, -1); | |
1779 | ||
1780 | ret = event_list_create_from_payload( | |
1781 | &events_view, count, &local_events); | |
1782 | if (ret != LTTNG_OK) { | |
1783 | goto end; | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | ret = flatten_lttng_events(&local_events, events); | |
1788 | if (ret != LTTNG_OK) { | |
1789 | goto end; | |
1790 | } | |
1791 | ||
1792 | end: | |
1793 | lttng_dynamic_pointer_array_reset(&local_events); | |
1794 | return ret; | |
1795 | } | |
b2d68839 JR |
1796 | |
1797 | static enum lttng_error_code flatten_lttng_event_fields( | |
1798 | struct lttng_dynamic_pointer_array *event_fields, | |
1799 | struct lttng_event_field **flattened_event_fields) | |
1800 | { | |
1801 | int ret, i; | |
1802 | enum lttng_error_code ret_code; | |
1803 | size_t storage_req = 0; | |
1804 | struct lttng_dynamic_buffer local_flattened_event_fields; | |
1805 | int nb_event_field; | |
1806 | ||
1807 | assert(event_fields); | |
1808 | assert(flattened_event_fields); | |
1809 | ||
1810 | lttng_dynamic_buffer_init(&local_flattened_event_fields); | |
1811 | nb_event_field = lttng_dynamic_pointer_array_get_count(event_fields); | |
1812 | ||
1813 | /* | |
1814 | * Here even if the event field contains a `struct lttng_event` that | |
1815 | * could contain dynamic data, in reality it is not the case. | |
1816 | * Dynamic data is not present. Here the flattening is mostly a direct | |
1817 | * memcpy. This is less than ideal but this code is still better than | |
1818 | * direct usage of an unpacked lttng_event_field array. | |
1819 | */ | |
1820 | storage_req += sizeof(struct lttng_event_field) * nb_event_field; | |
1821 | ||
1822 | lttng_dynamic_buffer_init(&local_flattened_event_fields); | |
1823 | ||
1824 | /* | |
1825 | * We must ensure that "local_flattened_event_fields" is never resized | |
1826 | * so as to preserve the validity of the flattened objects. | |
1827 | */ | |
1828 | ret = lttng_dynamic_buffer_set_capacity( | |
1829 | &local_flattened_event_fields, storage_req); | |
1830 | if (ret) { | |
1831 | ret_code = LTTNG_ERR_NOMEM; | |
1832 | goto end; | |
1833 | } | |
1834 | ||
1835 | for (i = 0; i < nb_event_field; i++) { | |
1836 | const struct lttng_event_field *element = | |
1837 | (const struct lttng_event_field *) | |
1838 | lttng_dynamic_pointer_array_get_pointer( | |
1839 | event_fields, i); | |
1840 | ||
1841 | if (!element) { | |
1842 | ret_code = LTTNG_ERR_FATAL; | |
1843 | goto end; | |
1844 | } | |
1845 | ret = lttng_dynamic_buffer_append(&local_flattened_event_fields, | |
1846 | element, sizeof(struct lttng_event_field)); | |
1847 | if (ret) { | |
1848 | ret_code = LTTNG_ERR_NOMEM; | |
1849 | goto end; | |
1850 | } | |
1851 | } | |
1852 | ||
1853 | /* Don't reset local_flattened_channels buffer as we return its content. */ | |
1854 | *flattened_event_fields = (struct lttng_event_field *) local_flattened_event_fields.data; | |
1855 | lttng_dynamic_buffer_init(&local_flattened_event_fields); | |
1856 | ret_code = LTTNG_OK; | |
1857 | end: | |
1858 | lttng_dynamic_buffer_reset(&local_flattened_event_fields); | |
1859 | return ret_code; | |
1860 | } | |
1861 | ||
1862 | static enum lttng_error_code event_field_list_create_from_payload( | |
1863 | struct lttng_payload_view *view, | |
1864 | unsigned int count, | |
1865 | struct lttng_dynamic_pointer_array **event_field_list) | |
1866 | { | |
1867 | enum lttng_error_code ret_code; | |
1868 | int ret, offset = 0; | |
1869 | unsigned int i; | |
1870 | struct lttng_dynamic_pointer_array *list = NULL; | |
1871 | ||
1872 | assert(view); | |
1873 | assert(event_field_list); | |
1874 | ||
1875 | list = (struct lttng_dynamic_pointer_array *) zmalloc(sizeof(*list)); | |
1876 | if (!list) { | |
1877 | ret_code = LTTNG_ERR_NOMEM; | |
1878 | goto end; | |
1879 | } | |
1880 | ||
1881 | lttng_dynamic_pointer_array_init(list, free); | |
1882 | ||
1883 | for (i = 0; i < count; i++) { | |
1884 | ssize_t event_field_size; | |
1885 | struct lttng_event_field *field = NULL; | |
1886 | struct lttng_payload_view event_field_view = | |
1887 | lttng_payload_view_from_view(view, offset, -1); | |
1888 | ||
1889 | event_field_size = lttng_event_field_create_from_payload( | |
1890 | &event_field_view, &field); | |
1891 | if (event_field_size < 0) { | |
1892 | ret_code = LTTNG_ERR_INVALID; | |
1893 | goto end; | |
1894 | } | |
1895 | ||
1896 | /* Lifetime and management of the object is now bound to the array. */ | |
1897 | ret = lttng_dynamic_pointer_array_add_pointer(list, field); | |
1898 | if (ret) { | |
1899 | free(field); | |
1900 | ret_code = LTTNG_ERR_NOMEM; | |
1901 | goto end; | |
1902 | } | |
1903 | ||
1904 | offset += event_field_size; | |
1905 | } | |
1906 | ||
1907 | if (view->buffer.size != offset) { | |
1908 | ret_code = LTTNG_ERR_INVALID; | |
1909 | goto end; | |
1910 | } | |
1911 | ||
1912 | *event_field_list = list; | |
1913 | list = NULL; | |
1914 | ret_code = LTTNG_OK; | |
1915 | ||
1916 | end: | |
1917 | if (list) { | |
1918 | lttng_dynamic_pointer_array_reset(list); | |
1919 | free(list); | |
1920 | } | |
1921 | ||
1922 | return ret_code; | |
1923 | } | |
1924 | ||
1925 | enum lttng_error_code lttng_event_fields_create_and_flatten_from_payload( | |
1926 | struct lttng_payload_view *view, | |
1927 | unsigned int count, | |
1928 | struct lttng_event_field **fields) | |
1929 | { | |
1930 | enum lttng_error_code ret_code; | |
1931 | struct lttng_dynamic_pointer_array *local_event_fields = NULL; | |
1932 | ||
1933 | ret_code = event_field_list_create_from_payload( | |
1934 | view, count, &local_event_fields); | |
1935 | if (ret_code != LTTNG_OK) { | |
1936 | goto end; | |
1937 | } | |
1938 | ||
1939 | ret_code = flatten_lttng_event_fields(local_event_fields, fields); | |
1940 | if (ret_code != LTTNG_OK) { | |
1941 | goto end; | |
1942 | } | |
1943 | end: | |
1944 | if (local_event_fields) { | |
1945 | lttng_dynamic_pointer_array_reset(local_event_fields); | |
1946 | free(local_event_fields); | |
1947 | } | |
1948 | ||
1949 | return ret_code; | |
1950 | } |