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808cb744 JR |
1 | /* |
2 | * Copyright (C) 2020 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include "lttng/lttng-error.h" | |
9 | #include <assert.h> | |
10 | #include <common/error.h> | |
11 | #include <common/macros.h> | |
12 | #include <common/payload.h> | |
13 | #include <common/payload-view.h> | |
14 | #include <fcntl.h> | |
15 | #include <lttng/constant.h> | |
16 | #include <lttng/kernel-probe.h> | |
17 | #include <lttng/kernel-probe-internal.h> | |
18 | #include <sys/stat.h> | |
19 | #include <sys/types.h> | |
20 | #include <sys/unistd.h> | |
21 | ||
22 | static | |
23 | int lttng_kernel_probe_location_address_serialize( | |
24 | const struct lttng_kernel_probe_location *location, | |
25 | struct lttng_payload *payload); | |
26 | ||
27 | static | |
28 | int lttng_kernel_probe_location_symbol_serialize( | |
29 | const struct lttng_kernel_probe_location *location, | |
30 | struct lttng_payload *payload); | |
31 | ||
32 | static | |
33 | bool lttng_kernel_probe_location_address_is_equal( | |
34 | const struct lttng_kernel_probe_location *a, | |
35 | const struct lttng_kernel_probe_location *b); | |
36 | ||
37 | static | |
38 | bool lttng_kernel_probe_location_symbol_is_equal( | |
39 | const struct lttng_kernel_probe_location *a, | |
40 | const struct lttng_kernel_probe_location *b); | |
41 | ||
42 | enum lttng_kernel_probe_location_type lttng_kernel_probe_location_get_type( | |
43 | const struct lttng_kernel_probe_location *location) | |
44 | { | |
45 | return location ? location->type : | |
46 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_UNKNOWN; | |
47 | } | |
48 | ||
49 | static | |
50 | void lttng_kernel_probe_location_address_destroy( | |
51 | struct lttng_kernel_probe_location *location) | |
52 | { | |
53 | assert(location); | |
54 | free(location); | |
55 | } | |
56 | ||
57 | static | |
58 | void lttng_kernel_probe_location_symbol_destroy( | |
59 | struct lttng_kernel_probe_location *location) | |
60 | { | |
61 | struct lttng_kernel_probe_location_symbol *location_symbol = NULL; | |
62 | ||
63 | assert(location); | |
64 | ||
65 | location_symbol = container_of(location, | |
66 | struct lttng_kernel_probe_location_symbol, | |
67 | parent); | |
68 | ||
69 | assert(location_symbol); | |
70 | ||
71 | free(location_symbol->symbol_name); | |
72 | free(location); | |
73 | } | |
74 | ||
75 | void lttng_kernel_probe_location_destroy( | |
76 | struct lttng_kernel_probe_location *location) | |
77 | { | |
78 | if (!location) { | |
79 | return; | |
80 | } | |
81 | ||
82 | switch (location->type) { | |
83 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS: | |
84 | lttng_kernel_probe_location_address_destroy(location); | |
85 | break; | |
86 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET: | |
87 | lttng_kernel_probe_location_symbol_destroy(location); | |
88 | break; | |
89 | default: | |
90 | abort(); | |
91 | } | |
92 | } | |
93 | ||
94 | struct lttng_kernel_probe_location * | |
95 | lttng_kernel_probe_location_address_create(uint64_t address) | |
96 | { | |
97 | struct lttng_kernel_probe_location *ret = NULL; | |
98 | struct lttng_kernel_probe_location_address *location; | |
99 | ||
100 | location = zmalloc(sizeof(*location)); | |
101 | if (!location) { | |
077192fd | 102 | PERROR("Error allocating userspace probe location."); |
808cb744 JR |
103 | goto end; |
104 | } | |
105 | ||
106 | location->address = address; | |
107 | ||
108 | ret = &location->parent; | |
109 | ret->type = LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS; | |
110 | ret->equal = lttng_kernel_probe_location_address_is_equal; | |
111 | ret->serialize = lttng_kernel_probe_location_address_serialize; | |
112 | ||
113 | end: | |
114 | return ret; | |
115 | } | |
116 | ||
117 | struct lttng_kernel_probe_location * | |
118 | lttng_kernel_probe_location_symbol_create(const char *symbol_name, | |
119 | uint64_t offset) | |
120 | { | |
121 | char *symbol_name_copy = NULL; | |
122 | struct lttng_kernel_probe_location *ret = NULL; | |
123 | struct lttng_kernel_probe_location_symbol *location; | |
124 | ||
125 | if (!symbol_name || strlen(symbol_name) >= LTTNG_SYMBOL_NAME_LEN) { | |
126 | goto error; | |
127 | } | |
128 | ||
129 | symbol_name_copy = strdup(symbol_name); | |
130 | if (!symbol_name_copy) { | |
131 | PERROR("Failed to copy symbol name '%s'", symbol_name); | |
132 | goto error; | |
133 | } | |
134 | ||
135 | location = zmalloc(sizeof(*location)); | |
136 | if (!location) { | |
137 | PERROR("Failed to allocate kernel symbol probe location"); | |
138 | goto error; | |
139 | } | |
140 | ||
141 | location->symbol_name = symbol_name_copy; | |
142 | location->offset = offset; | |
143 | ||
144 | ret = &location->parent; | |
145 | ret->type = LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET; | |
146 | ret->equal = lttng_kernel_probe_location_symbol_is_equal; | |
147 | ret->serialize = lttng_kernel_probe_location_symbol_serialize; | |
148 | goto end; | |
149 | ||
150 | error: | |
151 | free(symbol_name_copy); | |
152 | end: | |
153 | return ret; | |
154 | } | |
155 | ||
156 | enum lttng_kernel_probe_location_status | |
157 | lttng_kernel_probe_location_address_get_address( | |
158 | const struct lttng_kernel_probe_location *location, | |
159 | uint64_t *offset) | |
160 | { | |
161 | enum lttng_kernel_probe_location_status ret = | |
162 | LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK; | |
163 | struct lttng_kernel_probe_location_address *address_location; | |
164 | ||
165 | assert(offset); | |
166 | ||
167 | if (!location || lttng_kernel_probe_location_get_type(location) != | |
168 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS) { | |
169 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
170 | ret = LTTNG_KERNEL_PROBE_LOCATION_STATUS_INVALID; | |
171 | goto end; | |
172 | } | |
173 | ||
174 | address_location = container_of(location, | |
175 | struct lttng_kernel_probe_location_address, parent); | |
176 | *offset = address_location->address; | |
177 | end: | |
178 | return ret; | |
179 | } | |
180 | ||
181 | const char *lttng_kernel_probe_location_symbol_get_name( | |
182 | const struct lttng_kernel_probe_location *location) | |
183 | { | |
184 | const char *ret = NULL; | |
185 | struct lttng_kernel_probe_location_symbol *symbol_location; | |
186 | ||
187 | if (!location || lttng_kernel_probe_location_get_type(location) != | |
188 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET) { | |
189 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
190 | goto end; | |
191 | } | |
192 | ||
193 | symbol_location = container_of(location, | |
194 | struct lttng_kernel_probe_location_symbol, parent); | |
195 | ret = symbol_location->symbol_name; | |
196 | end: | |
197 | return ret; | |
198 | } | |
199 | ||
200 | enum lttng_kernel_probe_location_status | |
201 | lttng_kernel_probe_location_symbol_get_offset( | |
202 | const struct lttng_kernel_probe_location *location, | |
203 | uint64_t *offset) | |
204 | { | |
205 | enum lttng_kernel_probe_location_status ret = | |
206 | LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK; | |
207 | struct lttng_kernel_probe_location_symbol *symbol_location; | |
208 | ||
209 | assert(offset); | |
210 | ||
211 | if (!location || lttng_kernel_probe_location_get_type(location) != | |
212 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET) { | |
213 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
214 | ret = LTTNG_KERNEL_PROBE_LOCATION_STATUS_INVALID; | |
215 | goto end; | |
216 | } | |
217 | ||
218 | symbol_location = container_of(location, | |
219 | struct lttng_kernel_probe_location_symbol, parent); | |
220 | *offset = symbol_location->offset; | |
221 | end: | |
222 | return ret; | |
223 | } | |
224 | ||
225 | static | |
226 | int lttng_kernel_probe_location_symbol_serialize( | |
227 | const struct lttng_kernel_probe_location *location, | |
228 | struct lttng_payload *payload) | |
229 | { | |
230 | int ret; | |
231 | size_t symbol_name_len; | |
232 | size_t original_payload_size; | |
233 | struct lttng_kernel_probe_location_symbol *location_symbol; | |
234 | struct lttng_kernel_probe_location_symbol_comm location_symbol_comm; | |
235 | ||
236 | if (!location || !payload) { | |
237 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
238 | ret = -LTTNG_ERR_INVALID; | |
239 | goto end; | |
240 | } | |
241 | ||
242 | assert(lttng_kernel_probe_location_get_type(location) == | |
243 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET); | |
244 | ||
245 | original_payload_size = payload->buffer.size; | |
246 | location_symbol = container_of(location, | |
247 | struct lttng_kernel_probe_location_symbol, parent); | |
248 | ||
249 | if (!location_symbol->symbol_name) { | |
250 | ret = -LTTNG_ERR_INVALID; | |
251 | goto end; | |
252 | } | |
253 | ||
254 | symbol_name_len = strlen(location_symbol->symbol_name); | |
255 | if (symbol_name_len == 0) { | |
256 | ret = -LTTNG_ERR_INVALID; | |
257 | goto end; | |
258 | } | |
259 | ||
260 | location_symbol_comm.symbol_len = symbol_name_len + 1; | |
261 | location_symbol_comm.offset = location_symbol->offset; | |
262 | ||
263 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
264 | &location_symbol_comm, sizeof(location_symbol_comm)); | |
265 | if (ret) { | |
266 | ret = -LTTNG_ERR_INVALID; | |
267 | goto end; | |
268 | } | |
269 | ||
270 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
271 | location_symbol->symbol_name, | |
272 | location_symbol_comm.symbol_len); | |
273 | if (ret) { | |
274 | ret = -LTTNG_ERR_INVALID; | |
275 | goto end; | |
276 | } | |
277 | ||
278 | ret = (int) (payload->buffer.size - original_payload_size); | |
279 | end: | |
280 | return ret; | |
281 | } | |
282 | ||
283 | static | |
284 | int lttng_kernel_probe_location_address_serialize( | |
285 | const struct lttng_kernel_probe_location *location, | |
286 | struct lttng_payload *payload) | |
287 | { | |
288 | int ret; | |
289 | size_t original_payload_size; | |
290 | struct lttng_kernel_probe_location_address *location_address; | |
291 | struct lttng_kernel_probe_location_address_comm location_address_comm; | |
292 | ||
293 | assert(location); | |
294 | assert(lttng_kernel_probe_location_get_type(location) == | |
295 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS); | |
296 | ||
297 | original_payload_size = payload->buffer.size; | |
298 | location_address = container_of(location, | |
299 | struct lttng_kernel_probe_location_address, | |
300 | parent); | |
301 | ||
302 | location_address_comm.address = location_address->address; | |
303 | ||
304 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
305 | &location_address_comm, | |
306 | sizeof(location_address_comm)); | |
307 | if (ret) { | |
308 | ret = -LTTNG_ERR_INVALID; | |
309 | goto end; | |
310 | } | |
311 | ||
312 | ret = (int) (payload->buffer.size - original_payload_size); | |
313 | end: | |
314 | return ret; | |
315 | } | |
316 | ||
317 | LTTNG_HIDDEN | |
318 | int lttng_kernel_probe_location_serialize( | |
319 | const struct lttng_kernel_probe_location *location, | |
320 | struct lttng_payload *payload) | |
321 | { | |
322 | int ret; | |
323 | size_t original_payload_size; | |
324 | struct lttng_kernel_probe_location_comm location_generic_comm = {}; | |
325 | ||
326 | if (!location || !payload) { | |
327 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
328 | ret = -LTTNG_ERR_INVALID; | |
329 | goto end; | |
330 | } | |
331 | ||
332 | original_payload_size = payload->buffer.size; | |
333 | location_generic_comm.type = (int8_t) location->type; | |
334 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
335 | &location_generic_comm, | |
336 | sizeof(location_generic_comm)); | |
337 | if (ret) { | |
338 | goto end; | |
339 | } | |
340 | ||
341 | ret = location->serialize(location, payload); | |
342 | if (ret < 0) { | |
343 | goto end; | |
344 | } | |
345 | ||
346 | ret = (int) (payload->buffer.size - original_payload_size); | |
347 | end: | |
348 | return ret; | |
349 | } | |
350 | ||
351 | static | |
352 | int lttng_kernel_probe_location_symbol_create_from_payload( | |
353 | struct lttng_payload_view *view, | |
354 | struct lttng_kernel_probe_location **location) | |
355 | { | |
356 | struct lttng_kernel_probe_location_symbol_comm *location_symbol_comm; | |
357 | const char *symbol_name_src; | |
358 | ssize_t ret = 0; | |
359 | size_t expected_size; | |
360 | ||
361 | assert(location); | |
362 | ||
363 | if (view->buffer.size < sizeof(*location_symbol_comm)) { | |
364 | ret = -LTTNG_ERR_INVALID; | |
365 | goto end; | |
366 | } | |
367 | ||
368 | location_symbol_comm = | |
369 | (typeof(location_symbol_comm)) view->buffer.data; | |
370 | ||
371 | expected_size = sizeof(*location_symbol_comm) + | |
372 | location_symbol_comm->symbol_len; | |
373 | ||
374 | if (view->buffer.size < expected_size) { | |
375 | ret = -LTTNG_ERR_INVALID; | |
376 | goto end; | |
377 | } | |
378 | ||
379 | symbol_name_src = view->buffer.data + sizeof(*location_symbol_comm); | |
380 | ||
381 | if (!lttng_buffer_view_contains_string(&view->buffer, symbol_name_src, | |
382 | location_symbol_comm->symbol_len)) { | |
383 | ret = -LTTNG_ERR_INVALID; | |
384 | goto end; | |
385 | } | |
386 | ||
387 | *location = lttng_kernel_probe_location_symbol_create( | |
388 | symbol_name_src, location_symbol_comm->offset); | |
389 | if (!(*location)) { | |
390 | ret = -LTTNG_ERR_INVALID; | |
391 | goto end; | |
392 | } | |
393 | ||
394 | ret = (ssize_t) expected_size; | |
395 | end: | |
396 | return ret; | |
397 | } | |
398 | ||
399 | static | |
400 | ssize_t lttng_kernel_probe_location_address_create_from_payload( | |
401 | struct lttng_payload_view *view, | |
402 | struct lttng_kernel_probe_location **location) | |
403 | { | |
404 | struct lttng_kernel_probe_location_address_comm *location_address_comm; | |
405 | ssize_t ret = 0; | |
406 | size_t expected_size; | |
407 | ||
408 | assert(location); | |
409 | ||
410 | expected_size = sizeof(*location_address_comm); | |
411 | ||
412 | if (view->buffer.size < expected_size) { | |
413 | ret = -LTTNG_ERR_INVALID; | |
414 | goto end; | |
415 | } | |
416 | ||
417 | location_address_comm = | |
418 | (typeof(location_address_comm)) view->buffer.data; | |
419 | ||
420 | *location = lttng_kernel_probe_location_address_create(location_address_comm->address); | |
421 | if (!(*location)) { | |
422 | ret = -LTTNG_ERR_INVALID; | |
423 | goto end; | |
424 | } | |
425 | ||
426 | ret = (size_t) expected_size; | |
427 | end: | |
428 | return ret; | |
429 | } | |
430 | ||
431 | LTTNG_HIDDEN | |
432 | ssize_t lttng_kernel_probe_location_create_from_payload( | |
433 | struct lttng_payload_view *view, | |
434 | struct lttng_kernel_probe_location **location) | |
435 | { | |
808cb744 JR |
436 | enum lttng_kernel_probe_location_type type; |
437 | ssize_t consumed = 0; | |
438 | ssize_t ret; | |
3e6e0df2 JG |
439 | const struct lttng_kernel_probe_location_comm *probe_location_comm; |
440 | const struct lttng_payload_view probe_location_comm_view = | |
441 | lttng_payload_view_from_view( | |
442 | view, 0, sizeof(*probe_location_comm)); | |
808cb744 JR |
443 | |
444 | assert(view); | |
445 | assert(location); | |
446 | ||
3e6e0df2 | 447 | if (!lttng_payload_view_is_valid(&probe_location_comm_view)) { |
808cb744 JR |
448 | ret = -LTTNG_ERR_INVALID; |
449 | goto end; | |
450 | } | |
451 | ||
3e6e0df2 | 452 | probe_location_comm = (typeof(probe_location_comm)) probe_location_comm_view.buffer.data; |
808cb744 JR |
453 | type = (enum lttng_kernel_probe_location_type) probe_location_comm->type; |
454 | consumed += sizeof(*probe_location_comm); | |
455 | ||
456 | switch (type) { | |
457 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET: | |
458 | { | |
459 | struct lttng_payload_view location_view = | |
460 | lttng_payload_view_from_view( | |
461 | view, consumed, -1); | |
462 | ||
463 | ret = lttng_kernel_probe_location_symbol_create_from_payload( | |
464 | &location_view, location); | |
465 | break; | |
466 | } | |
467 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS: | |
468 | { | |
469 | struct lttng_payload_view location_view = | |
470 | lttng_payload_view_from_view(view, consumed, -1); | |
471 | ||
472 | ret = lttng_kernel_probe_location_address_create_from_payload( | |
473 | &location_view, location); | |
474 | break; | |
475 | } | |
476 | default: | |
477 | ret = -LTTNG_ERR_INVALID; | |
478 | break; | |
479 | } | |
480 | ||
481 | if (ret < 0) { | |
482 | ret = -LTTNG_ERR_INVALID; | |
483 | goto end; | |
484 | } | |
485 | ||
486 | ret += consumed; | |
487 | ||
488 | end: | |
489 | return ret; | |
490 | } | |
491 | ||
492 | static | |
493 | bool lttng_kernel_probe_location_address_is_equal( | |
494 | const struct lttng_kernel_probe_location *_a, | |
495 | const struct lttng_kernel_probe_location *_b) | |
496 | { | |
497 | bool is_equal = false; | |
498 | struct lttng_kernel_probe_location_address *a, *b; | |
499 | ||
500 | a = container_of(_a, struct lttng_kernel_probe_location_address, | |
501 | parent); | |
502 | b = container_of(_b, struct lttng_kernel_probe_location_address, | |
503 | parent); | |
504 | ||
505 | if (a->address != b->address) { | |
506 | goto end; | |
507 | } | |
508 | ||
509 | is_equal = true; | |
510 | ||
511 | end: | |
512 | return is_equal; | |
513 | } | |
514 | ||
515 | static | |
516 | bool lttng_kernel_probe_location_symbol_is_equal( | |
517 | const struct lttng_kernel_probe_location *_a, | |
518 | const struct lttng_kernel_probe_location *_b) | |
519 | { | |
520 | bool is_equal = false; | |
521 | struct lttng_kernel_probe_location_symbol *a, *b; | |
522 | ||
523 | a = container_of(_a, struct lttng_kernel_probe_location_symbol, | |
524 | parent); | |
525 | b = container_of(_b, struct lttng_kernel_probe_location_symbol, | |
526 | parent); | |
527 | ||
528 | assert(a->symbol_name); | |
529 | assert(b->symbol_name); | |
530 | if (strcmp(a->symbol_name, b->symbol_name)) { | |
531 | goto end; | |
532 | } | |
533 | ||
534 | if (a->offset != b->offset) { | |
535 | goto end; | |
536 | } | |
537 | ||
538 | is_equal = true; | |
539 | ||
540 | end: | |
541 | return is_equal; | |
542 | } | |
543 | ||
544 | LTTNG_HIDDEN | |
545 | bool lttng_kernel_probe_location_is_equal( | |
546 | const struct lttng_kernel_probe_location *a, | |
547 | const struct lttng_kernel_probe_location *b) | |
548 | { | |
549 | bool is_equal = false; | |
550 | ||
551 | if (!a || !b) { | |
552 | goto end; | |
553 | } | |
554 | ||
555 | if (a == b) { | |
556 | is_equal = true; | |
557 | goto end; | |
558 | } | |
559 | ||
560 | if (a->type != b->type) { | |
561 | goto end; | |
562 | } | |
563 | ||
564 | is_equal = a->equal ? a->equal(a, b) : true; | |
565 | end: | |
566 | return is_equal; | |
567 | } | |
077192fd JR |
568 | |
569 | static struct lttng_kernel_probe_location * | |
570 | lttng_kernel_probe_location_symbol_copy( | |
571 | const struct lttng_kernel_probe_location *location) | |
572 | { | |
573 | struct lttng_kernel_probe_location *new_location = NULL; | |
574 | struct lttng_kernel_probe_location_symbol *symbol_location; | |
575 | enum lttng_kernel_probe_location_status status; | |
576 | const char *symbol_name = NULL; | |
577 | uint64_t offset; | |
578 | ||
579 | assert(location); | |
580 | assert(location->type == LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET); | |
581 | symbol_location = container_of( | |
582 | location, typeof(*symbol_location), parent); | |
583 | ||
584 | /* Get probe location offset */ | |
585 | status = lttng_kernel_probe_location_symbol_get_offset(location, &offset); | |
586 | if (status != LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK) { | |
587 | ERR("Get kernel probe location offset failed."); | |
588 | goto error; | |
589 | } | |
590 | ||
591 | symbol_name = lttng_kernel_probe_location_symbol_get_name(location); | |
592 | if (!symbol_name) { | |
593 | ERR("Kernel probe symbol name is NULL."); | |
594 | goto error; | |
595 | } | |
596 | ||
597 | /* Create the probe_location */ | |
598 | new_location = lttng_kernel_probe_location_symbol_create( | |
599 | symbol_name, offset); | |
600 | ||
601 | goto end; | |
602 | ||
603 | error: | |
604 | new_location = NULL; | |
605 | end: | |
606 | return new_location; | |
607 | } | |
608 | static struct lttng_kernel_probe_location * | |
609 | lttng_kernel_probe_location_address_copy( | |
610 | const struct lttng_kernel_probe_location *location) | |
611 | { | |
612 | struct lttng_kernel_probe_location *new_location = NULL; | |
613 | struct lttng_kernel_probe_location_address *address_location; | |
614 | enum lttng_kernel_probe_location_status status; | |
615 | uint64_t address; | |
616 | ||
617 | assert(location); | |
618 | assert(location->type == LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS); | |
619 | address_location = container_of( | |
620 | location, typeof(*address_location), parent); | |
621 | ||
622 | ||
623 | /* Get probe location fields */ | |
624 | status = lttng_kernel_probe_location_address_get_address(location, &address); | |
625 | if (status != LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK) { | |
626 | ERR("Get kernel probe address failed."); | |
627 | goto error; | |
628 | } | |
629 | ||
630 | /* Create the probe_location */ | |
631 | new_location = lttng_kernel_probe_location_address_create(address); | |
632 | ||
633 | goto end; | |
634 | ||
635 | error: | |
636 | new_location = NULL; | |
637 | end: | |
638 | return new_location; | |
639 | } | |
640 | ||
641 | LTTNG_HIDDEN | |
642 | struct lttng_kernel_probe_location *lttng_kernel_probe_location_copy( | |
643 | const struct lttng_kernel_probe_location *location) | |
644 | { | |
645 | struct lttng_kernel_probe_location *new_location = NULL; | |
646 | enum lttng_kernel_probe_location_type type; | |
647 | ||
648 | if (!location) { | |
649 | goto err; | |
650 | } | |
651 | ||
652 | type = lttng_kernel_probe_location_get_type(location); | |
653 | switch (type) { | |
654 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS: | |
655 | new_location = | |
656 | lttng_kernel_probe_location_address_copy(location); | |
657 | if (!new_location) { | |
658 | goto err; | |
659 | } | |
660 | break; | |
661 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET: | |
662 | new_location = | |
663 | lttng_kernel_probe_location_symbol_copy(location); | |
664 | if (!new_location) { | |
665 | goto err; | |
666 | } | |
667 | break; | |
668 | default: | |
669 | new_location = NULL; | |
670 | goto err; | |
671 | } | |
672 | err: | |
673 | return new_location; | |
674 | } |