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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> | |
959e3c66 JR |
11 | #include <common/hashtable/hashtable.h> |
12 | #include <common/hashtable/utils.h> | |
0f7c2963 JR |
13 | #include <common/macros.h> |
14 | #include <common/mi-lttng.h> | |
15 | #include <common/payload-view.h> | |
16 | #include <common/payload.h> | |
808cb744 JR |
17 | #include <fcntl.h> |
18 | #include <lttng/constant.h> | |
808cb744 | 19 | #include <lttng/kernel-probe-internal.h> |
0f7c2963 | 20 | #include <lttng/kernel-probe.h> |
808cb744 JR |
21 | #include <sys/stat.h> |
22 | #include <sys/types.h> | |
04db7659 | 23 | #include <unistd.h> |
808cb744 JR |
24 | |
25 | static | |
26 | int lttng_kernel_probe_location_address_serialize( | |
27 | const struct lttng_kernel_probe_location *location, | |
28 | struct lttng_payload *payload); | |
29 | ||
30 | static | |
31 | int lttng_kernel_probe_location_symbol_serialize( | |
32 | const struct lttng_kernel_probe_location *location, | |
33 | struct lttng_payload *payload); | |
34 | ||
35 | static | |
36 | bool lttng_kernel_probe_location_address_is_equal( | |
37 | const struct lttng_kernel_probe_location *a, | |
38 | const struct lttng_kernel_probe_location *b); | |
39 | ||
40 | static | |
41 | bool lttng_kernel_probe_location_symbol_is_equal( | |
42 | const struct lttng_kernel_probe_location *a, | |
43 | const struct lttng_kernel_probe_location *b); | |
44 | ||
959e3c66 JR |
45 | static |
46 | unsigned long lttng_kernel_probe_location_address_hash( | |
47 | const struct lttng_kernel_probe_location *location); | |
48 | ||
49 | static | |
50 | unsigned long lttng_kernel_probe_location_symbol_hash( | |
51 | const struct lttng_kernel_probe_location *location); | |
52 | ||
0f7c2963 JR |
53 | static |
54 | enum lttng_error_code lttng_kernel_probe_location_address_mi_serialize( | |
55 | const struct lttng_kernel_probe_location *location, | |
56 | struct mi_writer *writer); | |
57 | ||
58 | static | |
59 | enum lttng_error_code lttng_kernel_probe_location_symbol_mi_serialize( | |
60 | const struct lttng_kernel_probe_location *location, | |
61 | struct mi_writer *writer); | |
62 | ||
808cb744 JR |
63 | enum lttng_kernel_probe_location_type lttng_kernel_probe_location_get_type( |
64 | const struct lttng_kernel_probe_location *location) | |
65 | { | |
66 | return location ? location->type : | |
67 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_UNKNOWN; | |
68 | } | |
69 | ||
70 | static | |
71 | void lttng_kernel_probe_location_address_destroy( | |
72 | struct lttng_kernel_probe_location *location) | |
73 | { | |
74 | assert(location); | |
75 | free(location); | |
76 | } | |
77 | ||
78 | static | |
79 | void lttng_kernel_probe_location_symbol_destroy( | |
80 | struct lttng_kernel_probe_location *location) | |
81 | { | |
82 | struct lttng_kernel_probe_location_symbol *location_symbol = NULL; | |
83 | ||
84 | assert(location); | |
85 | ||
86 | location_symbol = container_of(location, | |
87 | struct lttng_kernel_probe_location_symbol, | |
88 | parent); | |
89 | ||
90 | assert(location_symbol); | |
91 | ||
92 | free(location_symbol->symbol_name); | |
93 | free(location); | |
94 | } | |
95 | ||
96 | void lttng_kernel_probe_location_destroy( | |
97 | struct lttng_kernel_probe_location *location) | |
98 | { | |
99 | if (!location) { | |
100 | return; | |
101 | } | |
102 | ||
103 | switch (location->type) { | |
104 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS: | |
105 | lttng_kernel_probe_location_address_destroy(location); | |
106 | break; | |
107 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET: | |
108 | lttng_kernel_probe_location_symbol_destroy(location); | |
109 | break; | |
110 | default: | |
111 | abort(); | |
112 | } | |
113 | } | |
114 | ||
115 | struct lttng_kernel_probe_location * | |
116 | lttng_kernel_probe_location_address_create(uint64_t address) | |
117 | { | |
118 | struct lttng_kernel_probe_location *ret = NULL; | |
119 | struct lttng_kernel_probe_location_address *location; | |
120 | ||
121 | location = zmalloc(sizeof(*location)); | |
122 | if (!location) { | |
077192fd | 123 | PERROR("Error allocating userspace probe location."); |
808cb744 JR |
124 | goto end; |
125 | } | |
126 | ||
127 | location->address = address; | |
128 | ||
129 | ret = &location->parent; | |
130 | ret->type = LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS; | |
131 | ret->equal = lttng_kernel_probe_location_address_is_equal; | |
132 | ret->serialize = lttng_kernel_probe_location_address_serialize; | |
959e3c66 | 133 | ret->hash = lttng_kernel_probe_location_address_hash; |
0f7c2963 | 134 | ret->mi_serialize = lttng_kernel_probe_location_address_mi_serialize; |
808cb744 JR |
135 | |
136 | end: | |
137 | return ret; | |
138 | } | |
139 | ||
140 | struct lttng_kernel_probe_location * | |
141 | lttng_kernel_probe_location_symbol_create(const char *symbol_name, | |
142 | uint64_t offset) | |
143 | { | |
144 | char *symbol_name_copy = NULL; | |
145 | struct lttng_kernel_probe_location *ret = NULL; | |
146 | struct lttng_kernel_probe_location_symbol *location; | |
147 | ||
148 | if (!symbol_name || strlen(symbol_name) >= LTTNG_SYMBOL_NAME_LEN) { | |
149 | goto error; | |
150 | } | |
151 | ||
152 | symbol_name_copy = strdup(symbol_name); | |
153 | if (!symbol_name_copy) { | |
154 | PERROR("Failed to copy symbol name '%s'", symbol_name); | |
155 | goto error; | |
156 | } | |
157 | ||
158 | location = zmalloc(sizeof(*location)); | |
159 | if (!location) { | |
160 | PERROR("Failed to allocate kernel symbol probe location"); | |
161 | goto error; | |
162 | } | |
163 | ||
164 | location->symbol_name = symbol_name_copy; | |
165 | location->offset = offset; | |
166 | ||
167 | ret = &location->parent; | |
168 | ret->type = LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET; | |
169 | ret->equal = lttng_kernel_probe_location_symbol_is_equal; | |
170 | ret->serialize = lttng_kernel_probe_location_symbol_serialize; | |
959e3c66 | 171 | ret->hash = lttng_kernel_probe_location_symbol_hash; |
0f7c2963 | 172 | ret->mi_serialize = lttng_kernel_probe_location_symbol_mi_serialize; |
808cb744 JR |
173 | goto end; |
174 | ||
175 | error: | |
176 | free(symbol_name_copy); | |
177 | end: | |
178 | return ret; | |
179 | } | |
180 | ||
181 | enum lttng_kernel_probe_location_status | |
182 | lttng_kernel_probe_location_address_get_address( | |
183 | const struct lttng_kernel_probe_location *location, | |
184 | uint64_t *offset) | |
185 | { | |
186 | enum lttng_kernel_probe_location_status ret = | |
187 | LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK; | |
188 | struct lttng_kernel_probe_location_address *address_location; | |
189 | ||
190 | assert(offset); | |
191 | ||
192 | if (!location || lttng_kernel_probe_location_get_type(location) != | |
193 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS) { | |
194 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
195 | ret = LTTNG_KERNEL_PROBE_LOCATION_STATUS_INVALID; | |
196 | goto end; | |
197 | } | |
198 | ||
199 | address_location = container_of(location, | |
200 | struct lttng_kernel_probe_location_address, parent); | |
201 | *offset = address_location->address; | |
202 | end: | |
203 | return ret; | |
204 | } | |
205 | ||
206 | const char *lttng_kernel_probe_location_symbol_get_name( | |
207 | const struct lttng_kernel_probe_location *location) | |
208 | { | |
209 | const char *ret = NULL; | |
210 | struct lttng_kernel_probe_location_symbol *symbol_location; | |
211 | ||
212 | if (!location || lttng_kernel_probe_location_get_type(location) != | |
213 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET) { | |
214 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
215 | goto end; | |
216 | } | |
217 | ||
218 | symbol_location = container_of(location, | |
219 | struct lttng_kernel_probe_location_symbol, parent); | |
220 | ret = symbol_location->symbol_name; | |
221 | end: | |
222 | return ret; | |
223 | } | |
224 | ||
225 | enum lttng_kernel_probe_location_status | |
226 | lttng_kernel_probe_location_symbol_get_offset( | |
227 | const struct lttng_kernel_probe_location *location, | |
228 | uint64_t *offset) | |
229 | { | |
230 | enum lttng_kernel_probe_location_status ret = | |
231 | LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK; | |
232 | struct lttng_kernel_probe_location_symbol *symbol_location; | |
233 | ||
234 | assert(offset); | |
235 | ||
236 | if (!location || lttng_kernel_probe_location_get_type(location) != | |
237 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET) { | |
238 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
239 | ret = LTTNG_KERNEL_PROBE_LOCATION_STATUS_INVALID; | |
240 | goto end; | |
241 | } | |
242 | ||
243 | symbol_location = container_of(location, | |
244 | struct lttng_kernel_probe_location_symbol, parent); | |
245 | *offset = symbol_location->offset; | |
246 | end: | |
247 | return ret; | |
248 | } | |
249 | ||
250 | static | |
251 | int lttng_kernel_probe_location_symbol_serialize( | |
252 | const struct lttng_kernel_probe_location *location, | |
253 | struct lttng_payload *payload) | |
254 | { | |
255 | int ret; | |
256 | size_t symbol_name_len; | |
257 | size_t original_payload_size; | |
258 | struct lttng_kernel_probe_location_symbol *location_symbol; | |
259 | struct lttng_kernel_probe_location_symbol_comm location_symbol_comm; | |
260 | ||
261 | if (!location || !payload) { | |
262 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
263 | ret = -LTTNG_ERR_INVALID; | |
264 | goto end; | |
265 | } | |
266 | ||
267 | assert(lttng_kernel_probe_location_get_type(location) == | |
268 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET); | |
269 | ||
270 | original_payload_size = payload->buffer.size; | |
271 | location_symbol = container_of(location, | |
272 | struct lttng_kernel_probe_location_symbol, parent); | |
273 | ||
274 | if (!location_symbol->symbol_name) { | |
275 | ret = -LTTNG_ERR_INVALID; | |
276 | goto end; | |
277 | } | |
278 | ||
279 | symbol_name_len = strlen(location_symbol->symbol_name); | |
280 | if (symbol_name_len == 0) { | |
281 | ret = -LTTNG_ERR_INVALID; | |
282 | goto end; | |
283 | } | |
284 | ||
285 | location_symbol_comm.symbol_len = symbol_name_len + 1; | |
286 | location_symbol_comm.offset = location_symbol->offset; | |
287 | ||
288 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
289 | &location_symbol_comm, sizeof(location_symbol_comm)); | |
290 | if (ret) { | |
291 | ret = -LTTNG_ERR_INVALID; | |
292 | goto end; | |
293 | } | |
294 | ||
295 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
296 | location_symbol->symbol_name, | |
297 | location_symbol_comm.symbol_len); | |
298 | if (ret) { | |
299 | ret = -LTTNG_ERR_INVALID; | |
300 | goto end; | |
301 | } | |
302 | ||
303 | ret = (int) (payload->buffer.size - original_payload_size); | |
304 | end: | |
305 | return ret; | |
306 | } | |
307 | ||
308 | static | |
309 | int lttng_kernel_probe_location_address_serialize( | |
310 | const struct lttng_kernel_probe_location *location, | |
311 | struct lttng_payload *payload) | |
312 | { | |
313 | int ret; | |
314 | size_t original_payload_size; | |
315 | struct lttng_kernel_probe_location_address *location_address; | |
316 | struct lttng_kernel_probe_location_address_comm location_address_comm; | |
317 | ||
318 | assert(location); | |
319 | assert(lttng_kernel_probe_location_get_type(location) == | |
320 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS); | |
321 | ||
322 | original_payload_size = payload->buffer.size; | |
323 | location_address = container_of(location, | |
324 | struct lttng_kernel_probe_location_address, | |
325 | parent); | |
326 | ||
327 | location_address_comm.address = location_address->address; | |
328 | ||
329 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
330 | &location_address_comm, | |
331 | sizeof(location_address_comm)); | |
332 | if (ret) { | |
333 | ret = -LTTNG_ERR_INVALID; | |
334 | goto end; | |
335 | } | |
336 | ||
337 | ret = (int) (payload->buffer.size - original_payload_size); | |
338 | end: | |
339 | return ret; | |
340 | } | |
341 | ||
342 | LTTNG_HIDDEN | |
343 | int lttng_kernel_probe_location_serialize( | |
344 | const struct lttng_kernel_probe_location *location, | |
345 | struct lttng_payload *payload) | |
346 | { | |
347 | int ret; | |
348 | size_t original_payload_size; | |
349 | struct lttng_kernel_probe_location_comm location_generic_comm = {}; | |
350 | ||
351 | if (!location || !payload) { | |
352 | ERR("Invalid argument(s) passed to '%s'", __FUNCTION__); | |
353 | ret = -LTTNG_ERR_INVALID; | |
354 | goto end; | |
355 | } | |
356 | ||
357 | original_payload_size = payload->buffer.size; | |
358 | location_generic_comm.type = (int8_t) location->type; | |
359 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
360 | &location_generic_comm, | |
361 | sizeof(location_generic_comm)); | |
362 | if (ret) { | |
363 | goto end; | |
364 | } | |
365 | ||
366 | ret = location->serialize(location, payload); | |
367 | if (ret < 0) { | |
368 | goto end; | |
369 | } | |
370 | ||
371 | ret = (int) (payload->buffer.size - original_payload_size); | |
372 | end: | |
373 | return ret; | |
374 | } | |
375 | ||
376 | static | |
377 | int lttng_kernel_probe_location_symbol_create_from_payload( | |
378 | struct lttng_payload_view *view, | |
379 | struct lttng_kernel_probe_location **location) | |
380 | { | |
381 | struct lttng_kernel_probe_location_symbol_comm *location_symbol_comm; | |
382 | const char *symbol_name_src; | |
383 | ssize_t ret = 0; | |
384 | size_t expected_size; | |
385 | ||
386 | assert(location); | |
387 | ||
388 | if (view->buffer.size < sizeof(*location_symbol_comm)) { | |
389 | ret = -LTTNG_ERR_INVALID; | |
390 | goto end; | |
391 | } | |
392 | ||
393 | location_symbol_comm = | |
394 | (typeof(location_symbol_comm)) view->buffer.data; | |
395 | ||
396 | expected_size = sizeof(*location_symbol_comm) + | |
397 | location_symbol_comm->symbol_len; | |
398 | ||
399 | if (view->buffer.size < expected_size) { | |
400 | ret = -LTTNG_ERR_INVALID; | |
401 | goto end; | |
402 | } | |
403 | ||
404 | symbol_name_src = view->buffer.data + sizeof(*location_symbol_comm); | |
405 | ||
406 | if (!lttng_buffer_view_contains_string(&view->buffer, symbol_name_src, | |
407 | location_symbol_comm->symbol_len)) { | |
408 | ret = -LTTNG_ERR_INVALID; | |
409 | goto end; | |
410 | } | |
411 | ||
412 | *location = lttng_kernel_probe_location_symbol_create( | |
413 | symbol_name_src, location_symbol_comm->offset); | |
414 | if (!(*location)) { | |
415 | ret = -LTTNG_ERR_INVALID; | |
416 | goto end; | |
417 | } | |
418 | ||
419 | ret = (ssize_t) expected_size; | |
420 | end: | |
421 | return ret; | |
422 | } | |
423 | ||
424 | static | |
425 | ssize_t lttng_kernel_probe_location_address_create_from_payload( | |
426 | struct lttng_payload_view *view, | |
427 | struct lttng_kernel_probe_location **location) | |
428 | { | |
429 | struct lttng_kernel_probe_location_address_comm *location_address_comm; | |
430 | ssize_t ret = 0; | |
431 | size_t expected_size; | |
432 | ||
433 | assert(location); | |
434 | ||
435 | expected_size = sizeof(*location_address_comm); | |
436 | ||
437 | if (view->buffer.size < expected_size) { | |
438 | ret = -LTTNG_ERR_INVALID; | |
439 | goto end; | |
440 | } | |
441 | ||
442 | location_address_comm = | |
443 | (typeof(location_address_comm)) view->buffer.data; | |
444 | ||
445 | *location = lttng_kernel_probe_location_address_create(location_address_comm->address); | |
446 | if (!(*location)) { | |
447 | ret = -LTTNG_ERR_INVALID; | |
448 | goto end; | |
449 | } | |
450 | ||
451 | ret = (size_t) expected_size; | |
452 | end: | |
453 | return ret; | |
454 | } | |
455 | ||
456 | LTTNG_HIDDEN | |
457 | ssize_t lttng_kernel_probe_location_create_from_payload( | |
458 | struct lttng_payload_view *view, | |
459 | struct lttng_kernel_probe_location **location) | |
460 | { | |
808cb744 JR |
461 | enum lttng_kernel_probe_location_type type; |
462 | ssize_t consumed = 0; | |
463 | ssize_t ret; | |
3e6e0df2 JG |
464 | const struct lttng_kernel_probe_location_comm *probe_location_comm; |
465 | const struct lttng_payload_view probe_location_comm_view = | |
466 | lttng_payload_view_from_view( | |
467 | view, 0, sizeof(*probe_location_comm)); | |
808cb744 JR |
468 | |
469 | assert(view); | |
470 | assert(location); | |
471 | ||
3e6e0df2 | 472 | if (!lttng_payload_view_is_valid(&probe_location_comm_view)) { |
808cb744 JR |
473 | ret = -LTTNG_ERR_INVALID; |
474 | goto end; | |
475 | } | |
476 | ||
3e6e0df2 | 477 | probe_location_comm = (typeof(probe_location_comm)) probe_location_comm_view.buffer.data; |
808cb744 JR |
478 | type = (enum lttng_kernel_probe_location_type) probe_location_comm->type; |
479 | consumed += sizeof(*probe_location_comm); | |
480 | ||
481 | switch (type) { | |
482 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET: | |
483 | { | |
484 | struct lttng_payload_view location_view = | |
485 | lttng_payload_view_from_view( | |
486 | view, consumed, -1); | |
487 | ||
488 | ret = lttng_kernel_probe_location_symbol_create_from_payload( | |
489 | &location_view, location); | |
490 | break; | |
491 | } | |
492 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS: | |
493 | { | |
494 | struct lttng_payload_view location_view = | |
495 | lttng_payload_view_from_view(view, consumed, -1); | |
496 | ||
497 | ret = lttng_kernel_probe_location_address_create_from_payload( | |
498 | &location_view, location); | |
499 | break; | |
500 | } | |
501 | default: | |
502 | ret = -LTTNG_ERR_INVALID; | |
503 | break; | |
504 | } | |
505 | ||
506 | if (ret < 0) { | |
507 | ret = -LTTNG_ERR_INVALID; | |
508 | goto end; | |
509 | } | |
510 | ||
511 | ret += consumed; | |
512 | ||
513 | end: | |
514 | return ret; | |
515 | } | |
516 | ||
959e3c66 JR |
517 | static |
518 | unsigned long lttng_kernel_probe_location_address_hash( | |
519 | const struct lttng_kernel_probe_location *location) | |
520 | { | |
521 | unsigned long hash = hash_key_ulong( | |
522 | (void *) LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS, | |
523 | lttng_ht_seed); | |
524 | struct lttng_kernel_probe_location_address *address_location = | |
525 | container_of(location, typeof(*address_location), | |
526 | parent); | |
527 | ||
528 | hash ^= hash_key_u64(&address_location->address, lttng_ht_seed); | |
529 | ||
530 | return hash; | |
531 | } | |
532 | ||
808cb744 JR |
533 | static |
534 | bool lttng_kernel_probe_location_address_is_equal( | |
535 | const struct lttng_kernel_probe_location *_a, | |
536 | const struct lttng_kernel_probe_location *_b) | |
537 | { | |
538 | bool is_equal = false; | |
539 | struct lttng_kernel_probe_location_address *a, *b; | |
540 | ||
541 | a = container_of(_a, struct lttng_kernel_probe_location_address, | |
542 | parent); | |
543 | b = container_of(_b, struct lttng_kernel_probe_location_address, | |
544 | parent); | |
545 | ||
546 | if (a->address != b->address) { | |
547 | goto end; | |
548 | } | |
549 | ||
550 | is_equal = true; | |
551 | ||
552 | end: | |
553 | return is_equal; | |
554 | } | |
555 | ||
959e3c66 JR |
556 | static |
557 | unsigned long lttng_kernel_probe_location_symbol_hash( | |
558 | const struct lttng_kernel_probe_location *location) | |
559 | { | |
560 | unsigned long hash = hash_key_ulong( | |
561 | (void *) LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET, | |
562 | lttng_ht_seed); | |
563 | struct lttng_kernel_probe_location_symbol *symbol_location = | |
564 | container_of(location, typeof(*symbol_location), | |
565 | parent); | |
566 | ||
567 | hash ^= hash_key_str(symbol_location->symbol_name, lttng_ht_seed); | |
568 | hash ^= hash_key_u64(&symbol_location->offset, lttng_ht_seed); | |
569 | ||
570 | return hash; | |
571 | } | |
572 | ||
808cb744 JR |
573 | static |
574 | bool lttng_kernel_probe_location_symbol_is_equal( | |
575 | const struct lttng_kernel_probe_location *_a, | |
576 | const struct lttng_kernel_probe_location *_b) | |
577 | { | |
578 | bool is_equal = false; | |
579 | struct lttng_kernel_probe_location_symbol *a, *b; | |
580 | ||
581 | a = container_of(_a, struct lttng_kernel_probe_location_symbol, | |
582 | parent); | |
583 | b = container_of(_b, struct lttng_kernel_probe_location_symbol, | |
584 | parent); | |
585 | ||
586 | assert(a->symbol_name); | |
587 | assert(b->symbol_name); | |
588 | if (strcmp(a->symbol_name, b->symbol_name)) { | |
589 | goto end; | |
590 | } | |
591 | ||
592 | if (a->offset != b->offset) { | |
593 | goto end; | |
594 | } | |
595 | ||
596 | is_equal = true; | |
597 | ||
598 | end: | |
599 | return is_equal; | |
600 | } | |
601 | ||
602 | LTTNG_HIDDEN | |
603 | bool lttng_kernel_probe_location_is_equal( | |
604 | const struct lttng_kernel_probe_location *a, | |
605 | const struct lttng_kernel_probe_location *b) | |
606 | { | |
607 | bool is_equal = false; | |
608 | ||
609 | if (!a || !b) { | |
610 | goto end; | |
611 | } | |
612 | ||
613 | if (a == b) { | |
614 | is_equal = true; | |
615 | goto end; | |
616 | } | |
617 | ||
618 | if (a->type != b->type) { | |
619 | goto end; | |
620 | } | |
621 | ||
622 | is_equal = a->equal ? a->equal(a, b) : true; | |
623 | end: | |
624 | return is_equal; | |
625 | } | |
077192fd JR |
626 | |
627 | static struct lttng_kernel_probe_location * | |
628 | lttng_kernel_probe_location_symbol_copy( | |
629 | const struct lttng_kernel_probe_location *location) | |
630 | { | |
631 | struct lttng_kernel_probe_location *new_location = NULL; | |
632 | struct lttng_kernel_probe_location_symbol *symbol_location; | |
633 | enum lttng_kernel_probe_location_status status; | |
634 | const char *symbol_name = NULL; | |
635 | uint64_t offset; | |
636 | ||
637 | assert(location); | |
638 | assert(location->type == LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET); | |
639 | symbol_location = container_of( | |
640 | location, typeof(*symbol_location), parent); | |
641 | ||
642 | /* Get probe location offset */ | |
643 | status = lttng_kernel_probe_location_symbol_get_offset(location, &offset); | |
644 | if (status != LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK) { | |
645 | ERR("Get kernel probe location offset failed."); | |
646 | goto error; | |
647 | } | |
648 | ||
649 | symbol_name = lttng_kernel_probe_location_symbol_get_name(location); | |
650 | if (!symbol_name) { | |
651 | ERR("Kernel probe symbol name is NULL."); | |
652 | goto error; | |
653 | } | |
654 | ||
655 | /* Create the probe_location */ | |
656 | new_location = lttng_kernel_probe_location_symbol_create( | |
657 | symbol_name, offset); | |
658 | ||
659 | goto end; | |
660 | ||
661 | error: | |
662 | new_location = NULL; | |
663 | end: | |
664 | return new_location; | |
665 | } | |
666 | static struct lttng_kernel_probe_location * | |
667 | lttng_kernel_probe_location_address_copy( | |
668 | const struct lttng_kernel_probe_location *location) | |
669 | { | |
670 | struct lttng_kernel_probe_location *new_location = NULL; | |
671 | struct lttng_kernel_probe_location_address *address_location; | |
672 | enum lttng_kernel_probe_location_status status; | |
673 | uint64_t address; | |
674 | ||
675 | assert(location); | |
676 | assert(location->type == LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS); | |
677 | address_location = container_of( | |
678 | location, typeof(*address_location), parent); | |
679 | ||
680 | ||
681 | /* Get probe location fields */ | |
682 | status = lttng_kernel_probe_location_address_get_address(location, &address); | |
683 | if (status != LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK) { | |
684 | ERR("Get kernel probe address failed."); | |
685 | goto error; | |
686 | } | |
687 | ||
688 | /* Create the probe_location */ | |
689 | new_location = lttng_kernel_probe_location_address_create(address); | |
690 | ||
691 | goto end; | |
692 | ||
693 | error: | |
694 | new_location = NULL; | |
695 | end: | |
696 | return new_location; | |
697 | } | |
698 | ||
699 | LTTNG_HIDDEN | |
700 | struct lttng_kernel_probe_location *lttng_kernel_probe_location_copy( | |
701 | const struct lttng_kernel_probe_location *location) | |
702 | { | |
703 | struct lttng_kernel_probe_location *new_location = NULL; | |
704 | enum lttng_kernel_probe_location_type type; | |
705 | ||
706 | if (!location) { | |
707 | goto err; | |
708 | } | |
709 | ||
710 | type = lttng_kernel_probe_location_get_type(location); | |
711 | switch (type) { | |
712 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS: | |
713 | new_location = | |
714 | lttng_kernel_probe_location_address_copy(location); | |
715 | if (!new_location) { | |
716 | goto err; | |
717 | } | |
718 | break; | |
719 | case LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET: | |
720 | new_location = | |
721 | lttng_kernel_probe_location_symbol_copy(location); | |
722 | if (!new_location) { | |
723 | goto err; | |
724 | } | |
725 | break; | |
726 | default: | |
727 | new_location = NULL; | |
728 | goto err; | |
729 | } | |
730 | err: | |
731 | return new_location; | |
732 | } | |
959e3c66 JR |
733 | |
734 | LTTNG_HIDDEN | |
735 | unsigned long lttng_kernel_probe_location_hash( | |
736 | const struct lttng_kernel_probe_location *location) | |
737 | { | |
738 | return location->hash(location); | |
739 | } | |
0f7c2963 JR |
740 | |
741 | static | |
742 | enum lttng_error_code lttng_kernel_probe_location_address_mi_serialize( | |
743 | const struct lttng_kernel_probe_location *location, | |
744 | struct mi_writer *writer) | |
745 | { | |
746 | int ret; | |
747 | enum lttng_error_code ret_code; | |
748 | enum lttng_kernel_probe_location_status status; | |
749 | uint64_t address; | |
750 | ||
751 | assert(location); | |
752 | assert(writer); | |
753 | assert(location->type == LTTNG_KERNEL_PROBE_LOCATION_TYPE_ADDRESS); | |
754 | ||
755 | status = lttng_kernel_probe_location_address_get_address( | |
756 | location, &address); | |
757 | assert(status == LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK); | |
758 | ||
759 | /* Open kernel probe location address element. */ | |
760 | ret = mi_lttng_writer_open_element( | |
761 | writer, mi_lttng_element_kernel_probe_location_address); | |
762 | if (ret) { | |
763 | goto mi_error; | |
764 | } | |
765 | ||
766 | ret = mi_lttng_writer_write_element_unsigned_int(writer, | |
767 | mi_lttng_element_kernel_probe_location_address_address, | |
768 | address); | |
769 | if (ret) { | |
770 | goto mi_error; | |
771 | } | |
772 | ||
773 | /* Close kernel probe location address element. */ | |
774 | ret = mi_lttng_writer_close_element(writer); | |
775 | if (ret) { | |
776 | goto mi_error; | |
777 | } | |
778 | ||
779 | ret_code = LTTNG_OK; | |
780 | goto end; | |
781 | ||
782 | mi_error: | |
783 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
784 | end: | |
785 | return ret_code; | |
786 | } | |
787 | ||
788 | static | |
789 | enum lttng_error_code lttng_kernel_probe_location_symbol_mi_serialize( | |
790 | const struct lttng_kernel_probe_location *location, | |
791 | struct mi_writer *writer) | |
792 | { | |
793 | int ret; | |
794 | enum lttng_error_code ret_code; | |
795 | enum lttng_kernel_probe_location_status status; | |
796 | const char *name = NULL; | |
797 | uint64_t offset; | |
798 | ||
799 | assert(location); | |
800 | assert(writer); | |
801 | assert(location->type == | |
802 | LTTNG_KERNEL_PROBE_LOCATION_TYPE_SYMBOL_OFFSET); | |
803 | ||
804 | name = lttng_kernel_probe_location_symbol_get_name(location); | |
805 | assert(name); | |
806 | ||
807 | status = lttng_kernel_probe_location_symbol_get_offset( | |
808 | location, &offset); | |
809 | assert(status == LTTNG_KERNEL_PROBE_LOCATION_STATUS_OK); | |
810 | ||
811 | /* Open kernel probe location symbol offset element. */ | |
812 | ret = mi_lttng_writer_open_element(writer, | |
813 | mi_lttng_element_kernel_probe_location_symbol_offset); | |
814 | if (ret) { | |
815 | goto mi_error; | |
816 | } | |
817 | ||
818 | /* Name. */ | |
819 | ret = mi_lttng_writer_write_element_string(writer, | |
820 | mi_lttng_element_kernel_probe_location_symbol_offset_name, | |
821 | name); | |
822 | if (ret) { | |
823 | goto mi_error; | |
824 | } | |
825 | ||
826 | /* Offset. */ | |
827 | ret = mi_lttng_writer_write_element_unsigned_int(writer, | |
828 | mi_lttng_element_kernel_probe_location_symbol_offset_offset, | |
829 | offset); | |
830 | if (ret) { | |
831 | goto mi_error; | |
832 | } | |
833 | ||
834 | /* Close kernel probe location symbol offset element. */ | |
835 | ret = mi_lttng_writer_close_element(writer); | |
836 | if (ret) { | |
837 | goto mi_error; | |
838 | } | |
839 | ||
840 | ret_code = LTTNG_OK; | |
841 | goto end; | |
842 | ||
843 | mi_error: | |
844 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
845 | end: | |
846 | return ret_code; | |
847 | } | |
848 | ||
849 | LTTNG_HIDDEN | |
850 | enum lttng_error_code lttng_kernel_probe_location_mi_serialize( | |
851 | const struct lttng_kernel_probe_location *location, | |
852 | struct mi_writer *writer) | |
853 | { | |
854 | int ret; | |
855 | enum lttng_error_code ret_code; | |
856 | ||
857 | assert(location); | |
858 | assert(writer); | |
859 | ||
860 | /* Open kernel probe location element. */ | |
861 | ret = mi_lttng_writer_open_element( | |
862 | writer, mi_lttng_element_kernel_probe_location); | |
863 | if (ret) { | |
864 | goto mi_error; | |
865 | } | |
866 | ||
867 | /* Serialize the location sub type. */ | |
868 | ret_code = location->mi_serialize(location, writer); | |
869 | if (ret_code != LTTNG_OK) { | |
870 | goto end; | |
871 | } | |
872 | ||
873 | /* Close kernel probe location element. */ | |
874 | ret = mi_lttng_writer_close_element(writer); | |
875 | if (ret) { | |
876 | goto mi_error; | |
877 | } | |
878 | ||
879 | ret_code = LTTNG_OK; | |
880 | goto end; | |
881 | ||
882 | mi_error: | |
883 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
884 | end: | |
885 | return ret_code; | |
886 | } |