Commit | Line | Data |
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1ce46cfe | 1 | /* |
ab5be9fa | 2 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
1ce46cfe | 3 | * |
ab5be9fa | 4 | * SPDX-License-Identifier: LGPL-2.1-only |
1ce46cfe | 5 | * |
1ce46cfe JG |
6 | */ |
7 | ||
8 | #include <assert.h> | |
dfcfa983 | 9 | #include <common/compat/string.h> |
1ce46cfe JG |
10 | #include <common/error.h> |
11 | #include <common/macros.h> | |
9e620ea7 JG |
12 | #include <common/payload.h> |
13 | #include <common/payload-view.h> | |
1ce46cfe JG |
14 | #include <fcntl.h> |
15 | #include <lttng/constant.h> | |
16 | #include <lttng/userspace-probe-internal.h> | |
dfcfa983 JR |
17 | #include <sys/stat.h> |
18 | #include <sys/types.h> | |
19 | #include <sys/unistd.h> | |
1ce46cfe JG |
20 | |
21 | enum lttng_userspace_probe_location_lookup_method_type | |
22 | lttng_userspace_probe_location_lookup_method_get_type( | |
23 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
24 | { | |
25 | return lookup_method ? lookup_method->type : | |
26 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_UNKNOWN; | |
27 | } | |
28 | ||
29 | void lttng_userspace_probe_location_lookup_method_destroy( | |
30 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
31 | { | |
32 | if (!lookup_method){ | |
33 | return; | |
34 | } | |
35 | ||
5d21f143 | 36 | free(lookup_method); |
1ce46cfe JG |
37 | } |
38 | ||
39 | struct lttng_userspace_probe_location_lookup_method * | |
40 | lttng_userspace_probe_location_lookup_method_function_elf_create(void) | |
41 | { | |
42 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
43 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
44 | ||
45 | elf_method = zmalloc(sizeof(*elf_method)); | |
46 | if (!elf_method) { | |
47 | PERROR("zmalloc"); | |
48 | goto end; | |
49 | } | |
50 | ||
51 | ret = &elf_method->parent; | |
52 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
53 | end: | |
54 | return ret; | |
55 | } | |
56 | ||
f4d0bb2e FD |
57 | struct lttng_userspace_probe_location_lookup_method * |
58 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(void) | |
59 | { | |
60 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
61 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
62 | ||
63 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
64 | if (!sdt_method) { | |
65 | PERROR("zmalloc"); | |
66 | goto end; | |
67 | } | |
68 | ||
69 | ret = &sdt_method->parent; | |
70 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
71 | end: | |
72 | return ret; | |
73 | } | |
74 | ||
1ce46cfe JG |
75 | enum lttng_userspace_probe_location_type lttng_userspace_probe_location_get_type( |
76 | const struct lttng_userspace_probe_location *location) | |
77 | { | |
78 | return location ? location->type : | |
79 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN; | |
80 | } | |
81 | ||
82 | static | |
83 | void lttng_userspace_probe_location_function_destroy( | |
84 | struct lttng_userspace_probe_location *location) | |
85 | { | |
86 | struct lttng_userspace_probe_location_function *location_function = NULL; | |
87 | ||
88 | assert(location); | |
89 | ||
90 | location_function = container_of(location, | |
91 | struct lttng_userspace_probe_location_function, parent); | |
92 | ||
93 | assert(location_function); | |
94 | ||
95 | free(location_function->function_name); | |
96 | free(location_function->binary_path); | |
97 | if (location_function->binary_fd >= 0) { | |
98 | if (close(location_function->binary_fd)) { | |
99 | PERROR("close"); | |
100 | } | |
101 | } | |
102 | free(location); | |
103 | } | |
104 | ||
f4d0bb2e FD |
105 | static |
106 | void lttng_userspace_probe_location_tracepoint_destroy( | |
107 | struct lttng_userspace_probe_location *location) | |
108 | { | |
109 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint = NULL; | |
110 | ||
111 | assert(location); | |
112 | ||
113 | location_tracepoint = container_of(location, | |
114 | struct lttng_userspace_probe_location_tracepoint, | |
115 | parent); | |
116 | ||
117 | assert(location_tracepoint); | |
118 | ||
119 | free(location_tracepoint->probe_name); | |
120 | free(location_tracepoint->provider_name); | |
121 | free(location_tracepoint->binary_path); | |
122 | if (location_tracepoint->binary_fd >= 0) { | |
123 | if (close(location_tracepoint->binary_fd)) { | |
124 | PERROR("close"); | |
125 | } | |
126 | } | |
127 | free(location); | |
128 | } | |
129 | ||
1ce46cfe JG |
130 | void lttng_userspace_probe_location_destroy( |
131 | struct lttng_userspace_probe_location *location) | |
132 | { | |
133 | if (!location) { | |
134 | return; | |
135 | } | |
136 | ||
137 | lttng_userspace_probe_location_lookup_method_destroy( | |
138 | location->lookup_method); | |
139 | ||
140 | switch (location->type) { | |
141 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
142 | lttng_userspace_probe_location_function_destroy(location); | |
143 | break; | |
f4d0bb2e FD |
144 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
145 | lttng_userspace_probe_location_tracepoint_destroy(location); | |
146 | break; | |
1ce46cfe | 147 | default: |
adf53c67 | 148 | abort(); |
1ce46cfe JG |
149 | } |
150 | } | |
151 | ||
dfcfa983 JR |
152 | /* Compare two file descriptors based on their inode and device numbers. */ |
153 | static bool fd_is_equal(int a, int b) | |
154 | { | |
155 | int ret; | |
156 | bool is_equal = false; | |
157 | struct stat a_stat, b_stat; | |
158 | ||
159 | if (a < 0 && b >= 0) { | |
160 | goto end; | |
161 | } | |
162 | ||
163 | if (b < 0 && a >= 0) { | |
164 | goto end; | |
165 | } | |
166 | ||
167 | if (a < 0 && b < 0) { | |
168 | if (a == -1 && b == -1) { | |
169 | is_equal = true; | |
170 | goto end; | |
171 | } | |
172 | ||
173 | /* Invalid state, abort. */ | |
174 | abort(); | |
175 | } | |
176 | ||
177 | /* Both are valid file descriptors. */ | |
178 | ret = fstat(a, &a_stat); | |
179 | if (ret) { | |
180 | PERROR("Failed to fstat userspace probe location binary fd %d", | |
181 | a); | |
182 | goto end; | |
183 | } | |
184 | ||
185 | ret = fstat(b, &b_stat); | |
186 | if (ret) { | |
187 | PERROR("Failed to fstat userspace probe location binary fd %d", | |
188 | b); | |
189 | goto end; | |
190 | } | |
191 | ||
192 | is_equal = (a_stat.st_ino == b_stat.st_ino) && | |
193 | (a_stat.st_dev == b_stat.st_dev); | |
194 | ||
195 | end: | |
196 | return is_equal; | |
197 | } | |
198 | ||
199 | static bool lttng_userspace_probe_location_function_is_equal( | |
200 | const struct lttng_userspace_probe_location *_a, | |
201 | const struct lttng_userspace_probe_location *_b) | |
202 | { | |
203 | bool is_equal = false; | |
204 | struct lttng_userspace_probe_location_function *a, *b; | |
205 | ||
206 | a = container_of(_a, struct lttng_userspace_probe_location_function, | |
207 | parent); | |
208 | b = container_of(_b, struct lttng_userspace_probe_location_function, | |
209 | parent); | |
210 | ||
211 | if (a->instrumentation_type != b->instrumentation_type) { | |
212 | goto end; | |
213 | } | |
214 | ||
215 | assert(a->function_name); | |
216 | assert(b->function_name); | |
217 | if (strcmp(a->function_name, b->function_name)) { | |
218 | goto end; | |
219 | } | |
220 | ||
221 | assert(a->binary_path); | |
222 | assert(b->binary_path); | |
223 | if (strcmp(a->binary_path, b->binary_path)) { | |
224 | goto end; | |
225 | } | |
226 | ||
227 | is_equal = fd_is_equal(a->binary_fd, b->binary_fd); | |
228 | end: | |
229 | return is_equal; | |
230 | } | |
231 | ||
1ce46cfe JG |
232 | static struct lttng_userspace_probe_location * |
233 | lttng_userspace_probe_location_function_create_no_check(const char *binary_path, | |
234 | const char *function_name, | |
235 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
236 | bool open_binary) | |
237 | { | |
238 | int binary_fd = -1; | |
239 | char *function_name_copy = NULL, *binary_path_copy = NULL; | |
240 | struct lttng_userspace_probe_location *ret = NULL; | |
241 | struct lttng_userspace_probe_location_function *location; | |
242 | ||
243 | if (open_binary) { | |
244 | binary_fd = open(binary_path, O_RDONLY); | |
245 | if (binary_fd < 0) { | |
246 | PERROR("Error opening the binary"); | |
247 | goto error; | |
248 | } | |
249 | } else { | |
250 | binary_fd = -1; | |
251 | } | |
252 | ||
253 | function_name_copy = lttng_strndup(function_name, LTTNG_SYMBOL_NAME_LEN); | |
254 | if (!function_name_copy) { | |
255 | PERROR("Error duplicating the function name"); | |
256 | goto error; | |
257 | } | |
258 | ||
259 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
260 | if (!binary_path_copy) { | |
261 | PERROR("Error duplicating the function name"); | |
262 | goto error; | |
263 | } | |
264 | ||
265 | location = zmalloc(sizeof(*location)); | |
266 | if (!location) { | |
267 | PERROR("Error allocating userspace probe location"); | |
268 | goto error; | |
269 | } | |
270 | ||
271 | location->function_name = function_name_copy; | |
272 | location->binary_path = binary_path_copy; | |
273 | location->binary_fd = binary_fd; | |
9d3981b5 JG |
274 | location->instrumentation_type = |
275 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY; | |
1ce46cfe JG |
276 | |
277 | ret = &location->parent; | |
278 | ret->lookup_method = lookup_method; | |
279 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION; | |
dfcfa983 | 280 | ret->equal = lttng_userspace_probe_location_function_is_equal; |
1ce46cfe JG |
281 | goto end; |
282 | ||
283 | error: | |
284 | free(function_name_copy); | |
285 | free(binary_path_copy); | |
286 | if (binary_fd >= 0) { | |
287 | if (close(binary_fd)) { | |
288 | PERROR("Error closing binary fd in error path"); | |
289 | } | |
290 | } | |
291 | end: | |
292 | return ret; | |
293 | } | |
294 | ||
dfcfa983 JR |
295 | static bool lttng_userspace_probe_location_tracepoint_is_equal( |
296 | const struct lttng_userspace_probe_location *_a, | |
297 | const struct lttng_userspace_probe_location *_b) | |
298 | { | |
299 | bool is_equal = false; | |
300 | struct lttng_userspace_probe_location_tracepoint *a, *b; | |
301 | ||
302 | a = container_of(_a, struct lttng_userspace_probe_location_tracepoint, | |
303 | parent); | |
304 | b = container_of(_b, struct lttng_userspace_probe_location_tracepoint, | |
305 | parent); | |
306 | ||
307 | assert(a->probe_name); | |
308 | assert(b->probe_name); | |
309 | if (strcmp(a->probe_name, b->probe_name)) { | |
310 | goto end; | |
311 | } | |
312 | ||
313 | assert(a->provider_name); | |
314 | assert(b->provider_name); | |
315 | if (strcmp(a->provider_name, b->provider_name)) { | |
316 | goto end; | |
317 | } | |
318 | ||
319 | assert(a->binary_path); | |
320 | assert(b->binary_path); | |
321 | if (strcmp(a->binary_path, b->binary_path)) { | |
322 | goto end; | |
323 | } | |
324 | ||
325 | is_equal = fd_is_equal(a->binary_fd, b->binary_fd); | |
326 | ||
327 | end: | |
328 | return is_equal; | |
329 | } | |
330 | ||
f4d0bb2e FD |
331 | static struct lttng_userspace_probe_location * |
332 | lttng_userspace_probe_location_tracepoint_create_no_check(const char *binary_path, | |
333 | const char *provider_name, const char *probe_name, | |
334 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
335 | bool open_binary) | |
336 | { | |
337 | int binary_fd = -1; | |
338 | char *probe_name_copy = NULL; | |
339 | char *provider_name_copy = NULL; | |
340 | char *binary_path_copy = NULL; | |
341 | struct lttng_userspace_probe_location *ret = NULL; | |
342 | struct lttng_userspace_probe_location_tracepoint *location; | |
343 | ||
344 | if (open_binary) { | |
345 | binary_fd = open(binary_path, O_RDONLY); | |
346 | if (binary_fd < 0) { | |
347 | PERROR("open"); | |
348 | goto error; | |
349 | } | |
350 | } else { | |
351 | binary_fd = -1; | |
352 | } | |
353 | ||
354 | probe_name_copy = lttng_strndup(probe_name, LTTNG_SYMBOL_NAME_LEN); | |
355 | if (!probe_name_copy) { | |
356 | PERROR("lttng_strndup"); | |
357 | goto error; | |
358 | } | |
359 | ||
360 | provider_name_copy = lttng_strndup(provider_name, LTTNG_SYMBOL_NAME_LEN); | |
361 | if (!provider_name_copy) { | |
362 | PERROR("lttng_strndup"); | |
363 | goto error; | |
364 | } | |
365 | ||
366 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
367 | if (!binary_path_copy) { | |
368 | PERROR("lttng_strndup"); | |
369 | goto error; | |
370 | } | |
371 | ||
372 | location = zmalloc(sizeof(*location)); | |
373 | if (!location) { | |
374 | PERROR("zmalloc"); | |
375 | goto error; | |
376 | } | |
377 | ||
378 | location->probe_name = probe_name_copy; | |
379 | location->provider_name = provider_name_copy; | |
380 | location->binary_path = binary_path_copy; | |
381 | location->binary_fd = binary_fd; | |
382 | ||
383 | ret = &location->parent; | |
384 | ret->lookup_method = lookup_method; | |
385 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT; | |
dfcfa983 | 386 | ret->equal = lttng_userspace_probe_location_tracepoint_is_equal; |
f4d0bb2e FD |
387 | goto end; |
388 | ||
389 | error: | |
390 | free(probe_name_copy); | |
391 | free(provider_name_copy); | |
7c86453b | 392 | free(binary_path_copy); |
f4d0bb2e FD |
393 | if (binary_fd >= 0) { |
394 | if (close(binary_fd)) { | |
395 | PERROR("Error closing binary fd in error path"); | |
396 | } | |
397 | } | |
398 | end: | |
399 | return ret; | |
400 | } | |
401 | ||
1ce46cfe JG |
402 | struct lttng_userspace_probe_location * |
403 | lttng_userspace_probe_location_function_create(const char *binary_path, | |
404 | const char *function_name, | |
405 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
406 | { | |
407 | struct lttng_userspace_probe_location *ret = NULL; | |
408 | ||
409 | if (!binary_path || !function_name) { | |
410 | ERR("Invalid argument(s)"); | |
411 | goto end; | |
412 | } | |
413 | ||
414 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
415 | lookup_method)) { | |
416 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
417 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
418 | break; | |
419 | default: | |
420 | /* Invalid probe location lookup method. */ | |
421 | goto end; | |
422 | } | |
423 | ||
424 | ret = lttng_userspace_probe_location_function_create_no_check( | |
425 | binary_path, function_name, lookup_method, true); | |
426 | end: | |
427 | return ret; | |
428 | } | |
429 | ||
f4d0bb2e FD |
430 | struct lttng_userspace_probe_location * |
431 | lttng_userspace_probe_location_tracepoint_create(const char *binary_path, | |
432 | const char *provider_name, const char *probe_name, | |
433 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
434 | { | |
435 | struct lttng_userspace_probe_location *ret = NULL; | |
436 | ||
437 | if (!binary_path || !probe_name || !provider_name) { | |
438 | ERR("Invalid argument(s)"); | |
439 | goto end; | |
440 | } | |
441 | ||
442 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
443 | lookup_method)) { | |
444 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
445 | break; | |
446 | default: | |
447 | /* Invalid probe location lookup method. */ | |
448 | goto end; | |
449 | } | |
450 | ||
451 | ret = lttng_userspace_probe_location_tracepoint_create_no_check( | |
452 | binary_path, provider_name, probe_name, lookup_method, true); | |
453 | end: | |
454 | return ret; | |
455 | } | |
456 | ||
394357fe FD |
457 | static struct lttng_userspace_probe_location_lookup_method * |
458 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
459 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
460 | { | |
461 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
462 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
463 | ||
464 | assert(lookup_method); | |
465 | assert(lookup_method->type == | |
466 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF); | |
467 | ||
468 | elf_method = zmalloc(sizeof(*elf_method)); | |
469 | if (!elf_method) { | |
470 | PERROR("Error allocating ELF userspace probe lookup method"); | |
471 | goto error; | |
472 | } | |
473 | ||
474 | elf_method->parent.type = lookup_method->type; | |
475 | parent = &elf_method->parent; | |
476 | ||
477 | goto end; | |
478 | error: | |
479 | parent = NULL; | |
480 | end: | |
481 | return parent; | |
482 | } | |
483 | ||
f4d0bb2e FD |
484 | static struct lttng_userspace_probe_location_lookup_method * |
485 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
486 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
487 | { | |
488 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
489 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
490 | ||
491 | assert(lookup_method); | |
492 | assert(lookup_method->type == | |
493 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT); | |
494 | ||
495 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
496 | if (!sdt_method) { | |
497 | PERROR("zmalloc"); | |
498 | goto error; | |
499 | } | |
500 | ||
501 | sdt_method->parent.type = lookup_method->type; | |
502 | parent = &sdt_method->parent; | |
503 | ||
504 | goto end; | |
505 | ||
506 | error: | |
507 | parent = NULL; | |
508 | end: | |
509 | return parent; | |
510 | } | |
511 | ||
394357fe FD |
512 | static struct lttng_userspace_probe_location * |
513 | lttng_userspace_probe_location_function_copy( | |
514 | const struct lttng_userspace_probe_location *location) | |
515 | { | |
516 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
517 | struct lttng_userspace_probe_location *new_location = NULL; | |
518 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
519 | const char *binary_path = NULL; |
520 | const char *function_name = NULL; | |
d7ee7196 | 521 | int fd, new_fd; |
394357fe FD |
522 | |
523 | assert(location); | |
524 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
525 | ||
cc831309 FD |
526 | /* Get probe location fields */ |
527 | binary_path = lttng_userspace_probe_location_function_get_binary_path(location); | |
394357fe | 528 | if (!binary_path) { |
cc831309 | 529 | ERR("Userspace probe binary path is NULL"); |
394357fe FD |
530 | goto error; |
531 | } | |
532 | ||
cc831309 | 533 | function_name = lttng_userspace_probe_location_function_get_function_name(location); |
394357fe | 534 | if (!function_name) { |
cc831309 | 535 | ERR("Userspace probe function name is NULL"); |
394357fe FD |
536 | goto error; |
537 | } | |
538 | ||
539 | /* Duplicate the binary fd */ | |
d7ee7196 | 540 | fd = lttng_userspace_probe_location_function_get_binary_fd(location); |
394357fe | 541 | if (fd == -1) { |
d7ee7196 FD |
542 | ERR("Error getting file descriptor to binary"); |
543 | goto error; | |
544 | } | |
545 | ||
546 | new_fd = dup(fd); | |
547 | if (new_fd == -1) { | |
394357fe FD |
548 | PERROR("Error duplicating file descriptor to binary"); |
549 | goto error; | |
550 | } | |
551 | ||
552 | /* | |
553 | * Duplicate probe location method fields | |
554 | */ | |
555 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
556 | location->lookup_method); | |
557 | switch (lookup_type) { | |
558 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
559 | lookup_method = | |
560 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
561 | location->lookup_method); | |
562 | if (!lookup_method) { | |
563 | goto close_fd; | |
564 | } | |
565 | break; | |
566 | default: | |
567 | /* Invalid probe location lookup method. */ | |
568 | goto close_fd; | |
569 | } | |
570 | ||
571 | /* Create the probe_location */ | |
572 | new_location = lttng_userspace_probe_location_function_create_no_check( | |
cc831309 | 573 | binary_path, function_name, lookup_method, false); |
394357fe FD |
574 | if (!new_location) { |
575 | goto destroy_lookup_method; | |
576 | } | |
577 | ||
578 | /* Set the duplicated fd to the new probe_location */ | |
d7ee7196 | 579 | if (lttng_userspace_probe_location_function_set_binary_fd(new_location, new_fd) < 0) { |
394357fe FD |
580 | goto destroy_probe_location; |
581 | } | |
582 | ||
583 | goto end; | |
584 | ||
585 | destroy_probe_location: | |
586 | lttng_userspace_probe_location_destroy(new_location); | |
587 | destroy_lookup_method: | |
588 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
589 | close_fd: | |
d7ee7196 | 590 | if (close(new_fd) < 0) { |
394357fe FD |
591 | PERROR("Error closing duplicated file descriptor in error path"); |
592 | } | |
593 | error: | |
394357fe FD |
594 | new_location = NULL; |
595 | end: | |
596 | return new_location; | |
597 | } | |
598 | ||
f4d0bb2e FD |
599 | static struct lttng_userspace_probe_location * |
600 | lttng_userspace_probe_location_tracepoint_copy( | |
601 | const struct lttng_userspace_probe_location *location) | |
602 | { | |
603 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
604 | struct lttng_userspace_probe_location *new_location = NULL; | |
605 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
606 | const char *binary_path = NULL; |
607 | const char *probe_name = NULL; | |
608 | const char *provider_name = NULL; | |
d7ee7196 | 609 | int fd, new_fd; |
f4d0bb2e FD |
610 | |
611 | assert(location); | |
612 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
613 | ||
cc831309 FD |
614 | /* Get probe location fields */ |
615 | binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location); | |
f4d0bb2e | 616 | if (!binary_path) { |
cc831309 | 617 | ERR("Userspace probe binary path is NULL"); |
f4d0bb2e FD |
618 | goto error; |
619 | } | |
620 | ||
cc831309 | 621 | probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location); |
f4d0bb2e | 622 | if (!probe_name) { |
cc831309 | 623 | ERR("Userspace probe probe name is NULL"); |
f4d0bb2e FD |
624 | goto error; |
625 | } | |
626 | ||
cc831309 | 627 | provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location); |
f4d0bb2e | 628 | if (!provider_name) { |
cc831309 | 629 | ERR("Userspace probe provider name is NULL"); |
f4d0bb2e FD |
630 | goto error; |
631 | } | |
632 | ||
633 | /* Duplicate the binary fd */ | |
d7ee7196 | 634 | fd = lttng_userspace_probe_location_tracepoint_get_binary_fd(location); |
f4d0bb2e | 635 | if (fd == -1) { |
d7ee7196 FD |
636 | ERR("Error getting file descriptor to binary"); |
637 | goto error; | |
638 | } | |
639 | ||
640 | new_fd = dup(fd); | |
641 | if (new_fd == -1) { | |
cc831309 | 642 | PERROR("Error duplicating file descriptor to binary"); |
f4d0bb2e FD |
643 | goto error; |
644 | } | |
645 | ||
646 | /* | |
647 | * Duplicate probe location method fields | |
648 | */ | |
649 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
650 | location->lookup_method); | |
651 | switch (lookup_type) { | |
652 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
653 | lookup_method = | |
654 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
655 | location->lookup_method); | |
656 | if (!lookup_method) { | |
657 | goto close_fd; | |
658 | } | |
659 | break; | |
660 | default: | |
661 | /* Invalid probe location lookup method. */ | |
662 | goto close_fd; | |
663 | } | |
664 | ||
665 | /* Create the probe_location */ | |
666 | new_location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
cc831309 | 667 | binary_path, provider_name, probe_name, lookup_method, false); |
f4d0bb2e FD |
668 | if (!new_location) { |
669 | goto destroy_lookup_method; | |
670 | } | |
671 | ||
672 | /* Set the duplicated fd to the new probe_location */ | |
d7ee7196 | 673 | if (lttng_userspace_probe_location_tracepoint_set_binary_fd(new_location, new_fd) < 0) { |
f4d0bb2e FD |
674 | goto destroy_probe_location; |
675 | } | |
676 | ||
677 | goto end; | |
678 | ||
679 | destroy_probe_location: | |
680 | lttng_userspace_probe_location_destroy(new_location); | |
681 | destroy_lookup_method: | |
682 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
683 | close_fd: | |
d7ee7196 | 684 | if (close(new_fd) < 0) { |
cc831309 | 685 | PERROR("Error closing duplicated file descriptor in error path"); |
f4d0bb2e FD |
686 | } |
687 | error: | |
f4d0bb2e FD |
688 | new_location = NULL; |
689 | end: | |
690 | return new_location; | |
691 | } | |
692 | ||
1ce46cfe JG |
693 | const char *lttng_userspace_probe_location_function_get_binary_path( |
694 | const struct lttng_userspace_probe_location *location) | |
695 | { | |
696 | const char *ret = NULL; | |
697 | struct lttng_userspace_probe_location_function *function_location; | |
698 | ||
699 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
700 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
701 | ERR("Invalid argument(s)"); | |
702 | goto end; | |
703 | } | |
704 | ||
705 | function_location = container_of(location, | |
706 | struct lttng_userspace_probe_location_function, | |
707 | parent); | |
708 | ret = function_location->binary_path; | |
709 | end: | |
710 | return ret; | |
711 | } | |
712 | ||
f4d0bb2e FD |
713 | const char *lttng_userspace_probe_location_tracepoint_get_binary_path( |
714 | const struct lttng_userspace_probe_location *location) | |
715 | { | |
716 | const char *ret = NULL; | |
717 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
718 | ||
719 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
720 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
721 | ERR("Invalid argument(s)"); | |
722 | goto end; | |
723 | } | |
724 | ||
725 | tracepoint_location = container_of(location, | |
726 | struct lttng_userspace_probe_location_tracepoint, | |
727 | parent); | |
728 | ret = tracepoint_location->binary_path; | |
729 | end: | |
730 | return ret; | |
731 | } | |
732 | ||
1ce46cfe JG |
733 | const char *lttng_userspace_probe_location_function_get_function_name( |
734 | const struct lttng_userspace_probe_location *location) | |
735 | { | |
736 | const char *ret = NULL; | |
737 | struct lttng_userspace_probe_location_function *function_location; | |
738 | ||
739 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
740 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
741 | ERR("Invalid argument(s)"); | |
742 | goto end; | |
743 | } | |
744 | ||
745 | function_location = container_of(location, | |
746 | struct lttng_userspace_probe_location_function, parent); | |
747 | ret = function_location->function_name; | |
748 | end: | |
749 | return ret; | |
750 | } | |
751 | ||
f4d0bb2e FD |
752 | const char *lttng_userspace_probe_location_tracepoint_get_probe_name( |
753 | const struct lttng_userspace_probe_location *location) | |
754 | { | |
755 | const char *ret = NULL; | |
756 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
757 | ||
758 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
759 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
760 | ERR("Invalid argument(s)"); | |
761 | goto end; | |
762 | } | |
763 | ||
764 | tracepoint_location = container_of(location, | |
765 | struct lttng_userspace_probe_location_tracepoint, parent); | |
766 | ret = tracepoint_location->probe_name; | |
767 | end: | |
768 | return ret; | |
769 | } | |
770 | ||
771 | const char *lttng_userspace_probe_location_tracepoint_get_provider_name( | |
772 | const struct lttng_userspace_probe_location *location) | |
773 | { | |
774 | const char *ret = NULL; | |
775 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
776 | ||
777 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
778 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
779 | ERR("Invalid argument(s)"); | |
780 | goto end; | |
781 | } | |
782 | ||
783 | tracepoint_location = container_of(location, | |
784 | struct lttng_userspace_probe_location_tracepoint, parent); | |
785 | ret = tracepoint_location->provider_name; | |
786 | end: | |
787 | return ret; | |
788 | } | |
789 | ||
1ce46cfe JG |
790 | int lttng_userspace_probe_location_function_get_binary_fd( |
791 | const struct lttng_userspace_probe_location *location) | |
792 | { | |
793 | int ret = -1; | |
794 | struct lttng_userspace_probe_location_function *function_location; | |
795 | ||
796 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
797 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
798 | ERR("Invalid argument(s)"); | |
799 | goto end; | |
800 | } | |
801 | ||
802 | function_location = container_of(location, | |
803 | struct lttng_userspace_probe_location_function, parent); | |
804 | ret = function_location->binary_fd; | |
805 | end: | |
806 | return ret; | |
807 | } | |
808 | ||
9d3981b5 JG |
809 | enum lttng_userspace_probe_location_function_instrumentation_type |
810 | lttng_userspace_probe_location_function_get_instrumentation_type( | |
811 | const struct lttng_userspace_probe_location *location) | |
812 | { | |
813 | enum lttng_userspace_probe_location_function_instrumentation_type type; | |
814 | struct lttng_userspace_probe_location_function *function_location; | |
815 | ||
816 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
817 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
818 | ERR("Invalid argument(s)"); | |
819 | type = LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_UNKNOWN; | |
820 | goto end; | |
821 | } | |
822 | ||
823 | function_location = container_of(location, | |
824 | struct lttng_userspace_probe_location_function, parent); | |
825 | type = function_location->instrumentation_type; | |
826 | end: | |
827 | return type; | |
828 | } | |
829 | ||
830 | enum lttng_userspace_probe_location_status | |
831 | lttng_userspace_probe_location_function_set_instrumentation_type( | |
832 | const struct lttng_userspace_probe_location *location, | |
833 | enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type) | |
834 | { | |
835 | enum lttng_userspace_probe_location_status status = | |
836 | LTTNG_USERSPACE_PROBE_LOCATION_STATUS_OK; | |
837 | struct lttng_userspace_probe_location_function *function_location; | |
838 | ||
839 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
840 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION || | |
841 | instrumentation_type != | |
842 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY) { | |
843 | ERR("Invalid argument(s)"); | |
844 | status = LTTNG_USERSPACE_PROBE_LOCATION_STATUS_INVALID; | |
845 | goto end; | |
846 | } | |
847 | ||
848 | function_location = container_of(location, | |
849 | struct lttng_userspace_probe_location_function, parent); | |
850 | function_location->instrumentation_type = instrumentation_type; | |
851 | end: | |
852 | return status; | |
853 | } | |
854 | ||
f4d0bb2e FD |
855 | int lttng_userspace_probe_location_tracepoint_get_binary_fd( |
856 | const struct lttng_userspace_probe_location *location) | |
857 | { | |
858 | int ret = -1; | |
859 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
860 | ||
861 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
862 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
863 | ERR("Invalid argument(s)"); | |
864 | goto end; | |
865 | } | |
866 | ||
867 | tracepoint_location = container_of(location, | |
868 | struct lttng_userspace_probe_location_tracepoint, parent); | |
869 | ret = tracepoint_location->binary_fd; | |
870 | end: | |
871 | return ret; | |
872 | } | |
873 | ||
1ce46cfe JG |
874 | static struct lttng_userspace_probe_location_lookup_method * |
875 | lttng_userspace_probe_location_function_get_lookup_method( | |
876 | const struct lttng_userspace_probe_location *location) | |
877 | { | |
878 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
879 | ||
880 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
881 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
882 | ERR("Invalid argument(s)"); | |
883 | goto end; | |
884 | } | |
885 | ||
886 | ret = location->lookup_method; | |
887 | end: | |
888 | return ret; | |
889 | } | |
890 | ||
f4d0bb2e FD |
891 | static struct lttng_userspace_probe_location_lookup_method * |
892 | lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
893 | const struct lttng_userspace_probe_location *location) | |
894 | { | |
895 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
896 | ||
897 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
898 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
899 | ERR("Invalid argument(s)"); | |
900 | goto end; | |
901 | } | |
902 | ||
903 | ret = location->lookup_method; | |
904 | end: | |
905 | return ret; | |
906 | } | |
907 | ||
87597c2c | 908 | const struct lttng_userspace_probe_location_lookup_method * |
1ce46cfe JG |
909 | lttng_userspace_probe_location_get_lookup_method( |
910 | const struct lttng_userspace_probe_location *location) | |
911 | { | |
912 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
913 | ||
914 | assert(location); | |
915 | switch (location->type) { | |
916 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
917 | ret = lttng_userspace_probe_location_function_get_lookup_method( | |
918 | location); | |
919 | break; | |
f4d0bb2e FD |
920 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
921 | ret = lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
922 | location); | |
923 | break; | |
1ce46cfe JG |
924 | default: |
925 | ERR("Unknowned lookup method."); | |
926 | break; | |
927 | } | |
928 | return ret; | |
929 | } | |
930 | ||
931 | static | |
932 | int lttng_userspace_probe_location_lookup_method_serialize( | |
933 | struct lttng_userspace_probe_location_lookup_method *method, | |
934 | struct lttng_dynamic_buffer *buffer) | |
935 | { | |
936 | int ret; | |
937 | struct lttng_userspace_probe_location_lookup_method_comm | |
938 | lookup_method_comm; | |
939 | ||
940 | lookup_method_comm.type = (int8_t) (method ? method->type : | |
941 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT); | |
942 | if (buffer) { | |
943 | ret = lttng_dynamic_buffer_append(buffer, &lookup_method_comm, | |
944 | sizeof(lookup_method_comm)); | |
945 | if (ret) { | |
946 | goto end; | |
947 | } | |
948 | } | |
f4d0bb2e FD |
949 | ret = sizeof(lookup_method_comm); |
950 | end: | |
951 | return ret; | |
952 | } | |
953 | ||
954 | static | |
955 | int lttng_userspace_probe_location_function_serialize( | |
956 | const struct lttng_userspace_probe_location *location, | |
957 | struct lttng_dynamic_buffer *buffer, | |
958 | int *binary_fd) | |
959 | { | |
960 | int ret; | |
961 | size_t function_name_len, binary_path_len; | |
962 | struct lttng_userspace_probe_location_function *location_function; | |
963 | struct lttng_userspace_probe_location_function_comm location_function_comm; | |
964 | ||
965 | assert(location); | |
966 | assert(lttng_userspace_probe_location_get_type(location) == | |
967 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
968 | ||
969 | location_function = container_of(location, | |
970 | struct lttng_userspace_probe_location_function, | |
971 | parent); | |
972 | if (!location_function->function_name || !location_function->binary_path) { | |
973 | ret = -LTTNG_ERR_INVALID; | |
974 | goto end; | |
975 | } | |
976 | ||
977 | if (binary_fd && location_function->binary_fd < 0) { | |
978 | ret = -LTTNG_ERR_INVALID; | |
979 | goto end; | |
980 | } | |
981 | ||
982 | if (binary_fd) { | |
983 | *binary_fd = location_function->binary_fd; | |
984 | } | |
985 | ||
986 | function_name_len = strlen(location_function->function_name); | |
987 | if (function_name_len == 0) { | |
988 | ret = -LTTNG_ERR_INVALID; | |
989 | goto end; | |
990 | } | |
991 | binary_path_len = strlen(location_function->binary_path); | |
992 | if (binary_path_len == 0) { | |
993 | ret = -LTTNG_ERR_INVALID; | |
994 | goto end; | |
995 | } | |
996 | ||
997 | location_function_comm.function_name_len = function_name_len + 1; | |
998 | location_function_comm.binary_path_len = binary_path_len + 1; | |
999 | ||
1000 | if (buffer) { | |
1001 | ret = lttng_dynamic_buffer_append(buffer, | |
1002 | &location_function_comm, | |
1003 | sizeof(location_function_comm)); | |
1004 | if (ret) { | |
1005 | ret = -LTTNG_ERR_INVALID; | |
1006 | goto end; | |
1007 | } | |
1008 | ret = lttng_dynamic_buffer_append(buffer, | |
1009 | location_function->function_name, | |
1010 | location_function_comm.function_name_len); | |
1011 | if (ret) { | |
1012 | ret = -LTTNG_ERR_INVALID; | |
1013 | goto end; | |
1014 | } | |
1015 | ret = lttng_dynamic_buffer_append(buffer, | |
1016 | location_function->binary_path, | |
1017 | location_function_comm.binary_path_len); | |
1018 | if (ret) { | |
1019 | ret = -LTTNG_ERR_INVALID; | |
1020 | goto end; | |
1021 | } | |
1022 | } | |
1023 | ret = sizeof(location_function_comm) + | |
1024 | location_function_comm.function_name_len + | |
1025 | location_function_comm.binary_path_len; | |
1ce46cfe JG |
1026 | end: |
1027 | return ret; | |
1028 | } | |
1029 | ||
1030 | static | |
f4d0bb2e | 1031 | int lttng_userspace_probe_location_tracepoint_serialize( |
1ce46cfe JG |
1032 | const struct lttng_userspace_probe_location *location, |
1033 | struct lttng_dynamic_buffer *buffer, | |
1034 | int *binary_fd) | |
1035 | { | |
1036 | int ret; | |
f4d0bb2e FD |
1037 | size_t probe_name_len, provider_name_len, binary_path_len; |
1038 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint; | |
1039 | struct lttng_userspace_probe_location_tracepoint_comm location_tracepoint_comm; | |
1ce46cfe JG |
1040 | |
1041 | assert(location); | |
1042 | assert(lttng_userspace_probe_location_get_type(location) == | |
f4d0bb2e | 1043 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
1ce46cfe | 1044 | |
f4d0bb2e FD |
1045 | location_tracepoint = container_of(location, |
1046 | struct lttng_userspace_probe_location_tracepoint, | |
1ce46cfe | 1047 | parent); |
f4d0bb2e FD |
1048 | if (!location_tracepoint->probe_name || |
1049 | !location_tracepoint->provider_name || | |
1050 | !location_tracepoint->binary_path) { | |
1ce46cfe JG |
1051 | ret = -LTTNG_ERR_INVALID; |
1052 | goto end; | |
1053 | } | |
1054 | ||
f4d0bb2e | 1055 | if (binary_fd && location_tracepoint->binary_fd < 0) { |
1ce46cfe JG |
1056 | ret = -LTTNG_ERR_INVALID; |
1057 | goto end; | |
1058 | } | |
1059 | ||
1060 | if (binary_fd) { | |
f4d0bb2e | 1061 | *binary_fd = location_tracepoint->binary_fd; |
1ce46cfe JG |
1062 | } |
1063 | ||
f4d0bb2e FD |
1064 | probe_name_len = strlen(location_tracepoint->probe_name); |
1065 | if (probe_name_len == 0) { | |
1ce46cfe JG |
1066 | ret = -LTTNG_ERR_INVALID; |
1067 | goto end; | |
1068 | } | |
f4d0bb2e FD |
1069 | |
1070 | provider_name_len = strlen(location_tracepoint->provider_name); | |
1071 | if (provider_name_len == 0) { | |
1072 | ret = -LTTNG_ERR_INVALID; | |
1073 | goto end; | |
1074 | } | |
1075 | ||
1076 | binary_path_len = strlen(location_tracepoint->binary_path); | |
1ce46cfe JG |
1077 | if (binary_path_len == 0) { |
1078 | ret = -LTTNG_ERR_INVALID; | |
1079 | goto end; | |
1080 | } | |
1081 | ||
f4d0bb2e FD |
1082 | location_tracepoint_comm.probe_name_len = probe_name_len + 1; |
1083 | location_tracepoint_comm.provider_name_len = provider_name_len + 1; | |
1084 | location_tracepoint_comm.binary_path_len = binary_path_len + 1; | |
1ce46cfe JG |
1085 | |
1086 | if (buffer) { | |
1087 | ret = lttng_dynamic_buffer_append(buffer, | |
f4d0bb2e FD |
1088 | &location_tracepoint_comm, |
1089 | sizeof(location_tracepoint_comm)); | |
1ce46cfe JG |
1090 | if (ret) { |
1091 | ret = -LTTNG_ERR_INVALID; | |
1092 | goto end; | |
1093 | } | |
1094 | ret = lttng_dynamic_buffer_append(buffer, | |
f4d0bb2e FD |
1095 | location_tracepoint->probe_name, |
1096 | location_tracepoint_comm.probe_name_len); | |
1ce46cfe JG |
1097 | if (ret) { |
1098 | ret = -LTTNG_ERR_INVALID; | |
1099 | goto end; | |
1100 | } | |
1101 | ret = lttng_dynamic_buffer_append(buffer, | |
f4d0bb2e FD |
1102 | location_tracepoint->provider_name, |
1103 | location_tracepoint_comm.provider_name_len); | |
1104 | if (ret) { | |
1105 | ret = -LTTNG_ERR_INVALID; | |
1106 | goto end; | |
1107 | } | |
1108 | ret = lttng_dynamic_buffer_append(buffer, | |
1109 | location_tracepoint->binary_path, | |
1110 | location_tracepoint_comm.binary_path_len); | |
1ce46cfe JG |
1111 | if (ret) { |
1112 | ret = -LTTNG_ERR_INVALID; | |
1113 | goto end; | |
1114 | } | |
1115 | } | |
f4d0bb2e FD |
1116 | ret = sizeof(location_tracepoint_comm) + |
1117 | location_tracepoint_comm.probe_name_len + | |
1118 | location_tracepoint_comm.provider_name_len + | |
1119 | location_tracepoint_comm.binary_path_len; | |
1ce46cfe JG |
1120 | end: |
1121 | return ret; | |
1122 | } | |
1123 | ||
1124 | LTTNG_HIDDEN | |
1125 | int lttng_userspace_probe_location_serialize( | |
1126 | const struct lttng_userspace_probe_location *location, | |
1127 | struct lttng_dynamic_buffer *buffer, | |
1128 | int *binary_fd) | |
1129 | { | |
1130 | int ret, buffer_use = 0; | |
1131 | struct lttng_userspace_probe_location_comm location_generic_comm; | |
1132 | ||
1133 | if (!location) { | |
1134 | ERR("Invalid argument(s)"); | |
1135 | ret = -LTTNG_ERR_INVALID; | |
1136 | goto end; | |
1137 | } | |
1138 | ||
56f0bc67 JG |
1139 | memset(&location_generic_comm, 0, sizeof(location_generic_comm)); |
1140 | ||
1ce46cfe JG |
1141 | location_generic_comm.type = (int8_t) location->type; |
1142 | if (buffer) { | |
1143 | ret = lttng_dynamic_buffer_append(buffer, &location_generic_comm, | |
1144 | sizeof(location_generic_comm)); | |
1145 | if (ret) { | |
1146 | goto end; | |
1147 | } | |
1148 | } | |
1149 | buffer_use += sizeof(location_generic_comm); | |
1150 | ||
1151 | switch (lttng_userspace_probe_location_get_type(location)) { | |
1152 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1153 | ret = lttng_userspace_probe_location_function_serialize( | |
1154 | location, buffer, binary_fd); | |
1155 | break; | |
f4d0bb2e FD |
1156 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1157 | ret = lttng_userspace_probe_location_tracepoint_serialize( | |
1158 | location, buffer, binary_fd); | |
1159 | break; | |
1ce46cfe JG |
1160 | default: |
1161 | ERR("Unsupported probe location type"); | |
1162 | ret = -LTTNG_ERR_INVALID; | |
1163 | goto end; | |
1164 | } | |
1165 | if (ret < 0) { | |
1166 | goto end; | |
1167 | } | |
1168 | buffer_use += ret; | |
1169 | ||
1170 | ret = lttng_userspace_probe_location_lookup_method_serialize( | |
1171 | location->lookup_method, buffer); | |
1172 | if (ret < 0) { | |
1173 | goto end; | |
1174 | } | |
1175 | ret += buffer_use; | |
1176 | end: | |
1177 | return ret; | |
1178 | } | |
1179 | ||
1180 | static | |
1181 | int lttng_userspace_probe_location_function_create_from_buffer( | |
1182 | const struct lttng_buffer_view *buffer, | |
1183 | struct lttng_userspace_probe_location **location) | |
1184 | { | |
1185 | struct lttng_userspace_probe_location_function_comm *location_function_comm; | |
1186 | const char *function_name_src, *binary_path_src; | |
1187 | char *function_name = NULL, *binary_path = NULL; | |
1188 | int ret = 0; | |
1189 | ||
1190 | assert(buffer); | |
1191 | assert(buffer->data); | |
1192 | assert(location); | |
1193 | ||
1194 | location_function_comm = | |
1195 | (struct lttng_userspace_probe_location_function_comm *) buffer->data; | |
1196 | ||
1197 | const size_t expected_size = sizeof(*location_function_comm) + | |
1198 | location_function_comm->function_name_len + | |
1199 | location_function_comm->binary_path_len; | |
1200 | ||
1201 | if (buffer->size < expected_size) { | |
1202 | ret = -LTTNG_ERR_INVALID; | |
1203 | goto end; | |
1204 | } | |
1205 | ||
1206 | function_name_src = buffer->data + sizeof(*location_function_comm); | |
1207 | binary_path_src = function_name_src + | |
1208 | location_function_comm->function_name_len; | |
1209 | ||
1210 | if (function_name_src[location_function_comm->function_name_len - 1] != '\0') { | |
1211 | ret = -LTTNG_ERR_INVALID; | |
1212 | goto end; | |
1213 | } | |
1214 | if (binary_path_src[location_function_comm->binary_path_len - 1] != '\0') { | |
1215 | ret = -LTTNG_ERR_INVALID; | |
1216 | goto end; | |
1217 | } | |
1218 | ||
1219 | function_name = lttng_strndup(function_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1220 | if (!function_name) { | |
1221 | PERROR("lttng_strndup"); | |
2aa28610 | 1222 | ret = -LTTNG_ERR_NOMEM; |
1ce46cfe JG |
1223 | goto end; |
1224 | } | |
1225 | ||
1226 | binary_path = lttng_strndup(binary_path_src, LTTNG_PATH_MAX); | |
1227 | if (!binary_path) { | |
1228 | PERROR("lttng_strndup"); | |
2aa28610 | 1229 | ret = -LTTNG_ERR_NOMEM; |
1ce46cfe JG |
1230 | goto end; |
1231 | } | |
1232 | ||
1233 | *location = lttng_userspace_probe_location_function_create_no_check( | |
1234 | binary_path, function_name, NULL, false); | |
1235 | if (!(*location)) { | |
1236 | ret = -LTTNG_ERR_INVALID; | |
1237 | goto end; | |
1238 | } | |
1239 | ||
1240 | ret = (int) expected_size; | |
1241 | end: | |
1242 | free(function_name); | |
1243 | free(binary_path); | |
1244 | return ret; | |
1245 | } | |
1246 | ||
f4d0bb2e FD |
1247 | static |
1248 | int lttng_userspace_probe_location_tracepoint_create_from_buffer( | |
1249 | const struct lttng_buffer_view *buffer, | |
1250 | struct lttng_userspace_probe_location **location) | |
1251 | { | |
1252 | struct lttng_userspace_probe_location_tracepoint_comm *location_tracepoint_comm; | |
1253 | const char *probe_name_src, *provider_name_src, *binary_path_src; | |
1254 | char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL; | |
1255 | int ret = 0; | |
1256 | ||
1257 | assert(buffer); | |
1258 | assert(buffer->data); | |
1259 | assert(location); | |
1260 | ||
1261 | location_tracepoint_comm = | |
1262 | (struct lttng_userspace_probe_location_tracepoint_comm *) buffer->data; | |
1263 | ||
1264 | const size_t expected_size = sizeof(*location_tracepoint_comm) + | |
1265 | location_tracepoint_comm->probe_name_len + | |
1266 | location_tracepoint_comm->provider_name_len + | |
1267 | location_tracepoint_comm->binary_path_len; | |
1268 | ||
1269 | if (buffer->size < expected_size) { | |
1270 | ret = -LTTNG_ERR_INVALID; | |
1271 | goto end; | |
1272 | } | |
1273 | ||
1274 | probe_name_src = buffer->data + sizeof(*location_tracepoint_comm); | |
1275 | provider_name_src = probe_name_src + | |
1276 | location_tracepoint_comm->probe_name_len; | |
1277 | binary_path_src = provider_name_src + | |
1278 | location_tracepoint_comm->provider_name_len; | |
1279 | ||
1280 | if (probe_name_src[location_tracepoint_comm->probe_name_len - 1] != '\0') { | |
1281 | ret = -LTTNG_ERR_INVALID; | |
1282 | goto end; | |
1283 | } | |
1284 | ||
1285 | if (provider_name_src[location_tracepoint_comm->provider_name_len - 1] != '\0') { | |
1286 | ret = -LTTNG_ERR_INVALID; | |
1287 | goto end; | |
1288 | } | |
1289 | ||
1290 | if (binary_path_src[location_tracepoint_comm->binary_path_len - 1] != '\0') { | |
1291 | ret = -LTTNG_ERR_INVALID; | |
1292 | goto end; | |
1293 | } | |
1294 | ||
1295 | probe_name = lttng_strndup(probe_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1296 | if (!probe_name) { | |
1297 | PERROR("lttng_strndup"); | |
1298 | goto end; | |
1299 | } | |
1300 | provider_name = lttng_strndup(provider_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1301 | if (!provider_name) { | |
1302 | PERROR("lttng_strndup"); | |
1303 | goto end; | |
1304 | } | |
1305 | ||
1306 | binary_path = lttng_strndup(binary_path_src, LTTNG_SYMBOL_NAME_LEN); | |
1307 | if (!binary_path) { | |
1308 | PERROR("lttng_strndup"); | |
1309 | goto end; | |
1310 | } | |
1311 | ||
1312 | *location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
1313 | binary_path, provider_name, probe_name, NULL, false); | |
1314 | if (!(*location)) { | |
1315 | ret = -LTTNG_ERR_INVALID; | |
1316 | goto end; | |
1317 | } | |
1318 | ||
1319 | ret = (int) expected_size; | |
1320 | end: | |
1321 | free(probe_name); | |
1322 | free(provider_name); | |
1323 | free(binary_path); | |
1324 | return ret; | |
1325 | } | |
1326 | ||
1ce46cfe JG |
1327 | static |
1328 | int lttng_userspace_probe_location_lookup_method_create_from_buffer( | |
1329 | struct lttng_buffer_view *buffer, | |
1330 | struct lttng_userspace_probe_location_lookup_method **lookup_method) | |
1331 | { | |
1332 | int ret; | |
1333 | struct lttng_userspace_probe_location_lookup_method_comm *lookup_comm; | |
1334 | enum lttng_userspace_probe_location_lookup_method_type type; | |
1335 | ||
1336 | assert(buffer); | |
1337 | assert(buffer->data); | |
1338 | assert(lookup_method); | |
1339 | ||
1340 | if (buffer->size < sizeof(*lookup_comm)) { | |
1341 | ret = -LTTNG_ERR_INVALID; | |
1342 | goto end; | |
1343 | } | |
1344 | ||
1345 | lookup_comm = (struct lttng_userspace_probe_location_lookup_method_comm *) | |
1346 | buffer->data; | |
1347 | type = (enum lttng_userspace_probe_location_lookup_method_type) | |
1348 | lookup_comm->type; | |
1349 | switch (type) { | |
1350 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
1351 | *lookup_method = NULL; | |
1352 | break; | |
1353 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
1354 | *lookup_method = | |
1355 | lttng_userspace_probe_location_lookup_method_function_elf_create(); | |
1356 | if (!(*lookup_method)) { | |
1357 | ret = -LTTNG_ERR_INVALID; | |
1358 | goto end; | |
1359 | } | |
1360 | break; | |
f4d0bb2e FD |
1361 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
1362 | *lookup_method = | |
1363 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); | |
1364 | if (!(*lookup_method)) { | |
1365 | ret = -LTTNG_ERR_INVALID; | |
1366 | goto end; | |
1367 | } | |
1368 | break; | |
1ce46cfe JG |
1369 | default: |
1370 | ret = -LTTNG_ERR_INVALID; | |
1371 | goto end; | |
1372 | } | |
1373 | ||
1374 | ret = sizeof(*lookup_comm); | |
1375 | end: | |
1376 | return ret; | |
1377 | } | |
1378 | ||
1379 | LTTNG_HIDDEN | |
1380 | int lttng_userspace_probe_location_create_from_buffer( | |
1381 | const struct lttng_buffer_view *buffer, | |
1382 | struct lttng_userspace_probe_location **location) | |
1383 | { | |
1384 | struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
1385 | struct lttng_userspace_probe_location_comm *probe_location_comm; | |
1386 | enum lttng_userspace_probe_location_type type; | |
1387 | struct lttng_buffer_view lookup_method_view; | |
1388 | int consumed = 0; | |
1389 | int ret; | |
1390 | ||
1391 | ||
1392 | assert(buffer); | |
1393 | assert(buffer->data); | |
1394 | assert(location); | |
1395 | ||
1396 | lookup_method = NULL; | |
1397 | ||
1398 | if (buffer->size <= sizeof(*probe_location_comm)) { | |
1399 | ret = -LTTNG_ERR_INVALID; | |
1400 | goto end; | |
1401 | } | |
1402 | ||
1403 | probe_location_comm = | |
1404 | (struct lttng_userspace_probe_location_comm *) buffer->data; | |
1405 | type = (enum lttng_userspace_probe_location_type) probe_location_comm->type; | |
1406 | consumed += sizeof(*probe_location_comm); | |
1407 | ||
1408 | switch (type) { | |
1409 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1410 | { | |
1411 | struct lttng_buffer_view view = lttng_buffer_view_from_view( | |
1412 | buffer, consumed, buffer->size - consumed); | |
1413 | ||
1414 | ret = lttng_userspace_probe_location_function_create_from_buffer( | |
1415 | &view, location); | |
1416 | if (ret < 0) { | |
1417 | goto end; | |
1418 | } | |
1419 | break; | |
1420 | } | |
f4d0bb2e FD |
1421 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1422 | { | |
1423 | struct lttng_buffer_view view = lttng_buffer_view_from_view( | |
1424 | buffer, consumed, buffer->size - consumed); | |
1425 | ||
1426 | ret = lttng_userspace_probe_location_tracepoint_create_from_buffer( | |
1427 | &view, location); | |
1428 | if (ret < 0) { | |
1429 | goto end; | |
1430 | } | |
1431 | break; | |
1432 | } | |
1ce46cfe JG |
1433 | default: |
1434 | ret = -LTTNG_ERR_INVALID; | |
1435 | goto end; | |
1436 | } | |
1437 | ||
1438 | consumed += ret; | |
1439 | if (buffer->size <= consumed) { | |
1440 | ret = -LTTNG_ERR_INVALID; | |
1441 | goto end; | |
1442 | } | |
1443 | ||
1444 | lookup_method_view = lttng_buffer_view_from_view(buffer, consumed, | |
1445 | buffer->size - consumed); | |
1446 | ret = lttng_userspace_probe_location_lookup_method_create_from_buffer( | |
1447 | &lookup_method_view, &lookup_method); | |
1448 | if (ret < 0) { | |
1449 | ret = -LTTNG_ERR_INVALID; | |
1450 | goto end; | |
1451 | } | |
1452 | ||
1453 | assert(lookup_method); | |
1454 | (*location)->lookup_method = lookup_method; | |
1455 | lookup_method = NULL; | |
1456 | ret += consumed; | |
1457 | end: | |
1458 | return ret; | |
1459 | } | |
1460 | ||
1461 | LTTNG_HIDDEN | |
1462 | int lttng_userspace_probe_location_function_set_binary_fd( | |
1463 | struct lttng_userspace_probe_location *location, int binary_fd) | |
1464 | { | |
1465 | int ret = 0; | |
1466 | struct lttng_userspace_probe_location_function *function_location; | |
1467 | ||
1468 | assert(location); | |
1469 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
1470 | ||
1471 | function_location = container_of(location, | |
1472 | struct lttng_userspace_probe_location_function, parent); | |
1473 | if (function_location->binary_fd >= 0) { | |
1474 | ret = close(function_location->binary_fd); | |
1475 | if (ret) { | |
1476 | PERROR("close"); | |
1477 | ret = -LTTNG_ERR_INVALID; | |
1478 | goto end; | |
1479 | } | |
1480 | } | |
1481 | ||
1482 | function_location->binary_fd = binary_fd; | |
1483 | end: | |
1484 | return ret; | |
1485 | } | |
1486 | ||
f4d0bb2e FD |
1487 | LTTNG_HIDDEN |
1488 | int lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
1489 | struct lttng_userspace_probe_location *location, int binary_fd) | |
1490 | { | |
1491 | int ret = 0; | |
1492 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
1493 | ||
1494 | assert(location); | |
1495 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
1496 | ||
1497 | tracepoint_location = container_of(location, | |
1498 | struct lttng_userspace_probe_location_tracepoint, parent); | |
1499 | if (tracepoint_location->binary_fd >= 0) { | |
1500 | ret = close(tracepoint_location->binary_fd); | |
1501 | if (ret) { | |
1502 | PERROR("close"); | |
1503 | ret = -LTTNG_ERR_INVALID; | |
1504 | goto end; | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | tracepoint_location->binary_fd = binary_fd; | |
1509 | end: | |
1510 | return ret; | |
1511 | } | |
1512 | ||
1ce46cfe JG |
1513 | static |
1514 | int lttng_userspace_probe_location_function_flatten( | |
1515 | const struct lttng_userspace_probe_location *location, | |
1516 | struct lttng_dynamic_buffer *buffer) | |
1517 | { | |
1518 | struct lttng_userspace_probe_location_lookup_method_elf flat_lookup_method; | |
1519 | struct lttng_userspace_probe_location_function *probe_function; | |
1520 | struct lttng_userspace_probe_location_function flat_probe; | |
1521 | size_t function_name_len, binary_path_len; | |
1522 | size_t padding_needed = 0; | |
1523 | char *flat_probe_start; | |
1524 | int storage_needed = 0; | |
1525 | int ret; | |
1526 | ||
1527 | assert(location); | |
1528 | ||
1529 | if (location->lookup_method && location->lookup_method->type != | |
1530 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF) { | |
1531 | ret = -LTTNG_ERR_INVALID; | |
1532 | goto end; | |
1533 | } | |
1534 | ||
1535 | probe_function = container_of(location, | |
1536 | struct lttng_userspace_probe_location_function, | |
1537 | parent); | |
1538 | assert(probe_function->function_name); | |
1539 | assert(probe_function->binary_path); | |
1540 | ||
1541 | storage_needed += | |
1542 | sizeof(struct lttng_userspace_probe_location_function); | |
1543 | function_name_len = strlen(probe_function->function_name) + 1; | |
1544 | binary_path_len = strlen(probe_function->binary_path) + 1; | |
1545 | storage_needed += function_name_len + binary_path_len; | |
1546 | ||
1547 | /* | |
1548 | * The lookup method is aligned to 64-bit within the buffer. | |
1549 | * This is needed even if there is no lookup method since | |
1550 | * the next structure in the buffer probably needs to be | |
1551 | * aligned too (depending on the arch). | |
1552 | */ | |
1553 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1554 | storage_needed += padding_needed; | |
1555 | ||
1556 | if (location->lookup_method) { | |
1557 | /* NOTE: elf look-up method is assumed here. */ | |
1558 | storage_needed += sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1559 | } | |
1560 | ||
1561 | if (!buffer) { | |
1562 | ret = storage_needed; | |
1563 | goto end; | |
1564 | } | |
1565 | ||
1566 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1567 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1568 | buffer->size + storage_needed); | |
1569 | if (ret) { | |
1570 | goto end; | |
1571 | } | |
1572 | } | |
1573 | ||
1574 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1575 | ||
1576 | flat_probe_start = buffer->data + buffer->size; | |
1577 | flat_probe.parent.type = location->type; | |
1578 | /* | |
1579 | * The lookup method, if present, is the last element in the flat | |
1580 | * representation of the probe. | |
1581 | */ | |
1582 | if (location->lookup_method) { | |
1583 | flat_probe.parent.lookup_method = | |
1584 | (struct lttng_userspace_probe_location_lookup_method *) | |
1585 | (flat_probe_start + sizeof(flat_probe) + | |
1586 | function_name_len + binary_path_len + padding_needed); | |
1587 | } else { | |
1588 | flat_probe.parent.lookup_method = NULL; | |
1589 | } | |
1590 | ||
1591 | flat_probe.function_name = flat_probe_start + sizeof(flat_probe); | |
1592 | flat_probe.binary_path = flat_probe.function_name + function_name_len; | |
1593 | flat_probe.binary_fd = -1; | |
1594 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, | |
1595 | sizeof(flat_probe)); | |
1596 | if (ret) { | |
1597 | goto end; | |
1598 | } | |
1599 | ||
1600 | ret = lttng_dynamic_buffer_append(buffer, | |
1601 | probe_function->function_name, function_name_len); | |
1602 | if (ret) { | |
1603 | goto end; | |
1604 | } | |
1605 | ret = lttng_dynamic_buffer_append(buffer, | |
1606 | probe_function->binary_path, binary_path_len); | |
1607 | if (ret) { | |
1608 | goto end; | |
1609 | } | |
1610 | ||
1611 | /* Insert padding before the lookup method. */ | |
1612 | ret = lttng_dynamic_buffer_set_size(buffer, | |
1613 | buffer->size + padding_needed); | |
1614 | if (ret) { | |
1615 | goto end; | |
1616 | } | |
1617 | ||
1618 | if (!location->lookup_method) { | |
1619 | /* Not an error, the default method is used. */ | |
1620 | ret = storage_needed; | |
1621 | goto end; | |
1622 | } | |
1623 | ||
1624 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1625 | flat_lookup_method.parent.type = | |
1626 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
1627 | ret = lttng_dynamic_buffer_append(buffer, | |
1628 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1629 | if (ret) { | |
1630 | goto end; | |
1631 | } | |
1632 | ret = storage_needed; | |
1633 | end: | |
1634 | return ret; | |
1635 | } | |
1636 | ||
f4d0bb2e FD |
1637 | static |
1638 | int lttng_userspace_probe_location_tracepoint_flatten( | |
1639 | const struct lttng_userspace_probe_location *location, | |
1640 | struct lttng_dynamic_buffer *buffer) | |
1641 | { | |
1642 | struct lttng_userspace_probe_location_lookup_method_sdt flat_lookup_method; | |
1643 | struct lttng_userspace_probe_location_tracepoint *probe_tracepoint; | |
1644 | struct lttng_userspace_probe_location_tracepoint flat_probe; | |
1645 | size_t probe_name_len, provider_name_len, binary_path_len; | |
1646 | size_t padding_needed = 0; | |
1647 | int storage_needed = 0; | |
1648 | char *flat_probe_start; | |
1649 | int ret = 0; | |
1650 | ||
1651 | assert(location); | |
1652 | ||
1653 | /* Only SDT tracepoints are supported at the moment */ | |
1654 | if (location->lookup_method && location->lookup_method->type != | |
1655 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT) { | |
1656 | ret = -LTTNG_ERR_INVALID; | |
1657 | goto end; | |
1658 | } | |
1659 | probe_tracepoint = container_of(location, | |
1660 | struct lttng_userspace_probe_location_tracepoint, | |
1661 | parent); | |
1662 | assert(probe_tracepoint->probe_name); | |
1663 | assert(probe_tracepoint->provider_name); | |
1664 | assert(probe_tracepoint->binary_path); | |
1665 | ||
1666 | /* Compute the storage space needed to flatten the probe location */ | |
1667 | storage_needed += sizeof(struct lttng_userspace_probe_location_tracepoint); | |
1668 | ||
1669 | probe_name_len = strlen(probe_tracepoint->probe_name) + 1; | |
1670 | provider_name_len = strlen(probe_tracepoint->provider_name) + 1; | |
1671 | binary_path_len = strlen(probe_tracepoint->binary_path) + 1; | |
1672 | ||
1673 | storage_needed += probe_name_len + provider_name_len + binary_path_len; | |
1674 | ||
1675 | /* | |
1676 | * The lookup method is aligned to 64-bit within the buffer. | |
1677 | * This is needed even if there is no lookup method since | |
1678 | * the next structure in the buffer probably needs to be | |
1679 | * aligned too (depending on the arch). | |
1680 | */ | |
1681 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1682 | storage_needed += padding_needed; | |
1683 | ||
1684 | if (location->lookup_method) { | |
1685 | /* NOTE: elf look-up method is assumed here. */ | |
1686 | storage_needed += | |
1687 | sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1688 | } | |
1689 | ||
1690 | /* | |
1691 | * If the caller set buffer to NULL, return the size of the needed buffer. | |
1692 | */ | |
1693 | if (!buffer) { | |
1694 | ret = storage_needed; | |
1695 | goto end; | |
1696 | } | |
1697 | ||
1698 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1699 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1700 | buffer->size + storage_needed); | |
1701 | if (ret) { | |
1702 | goto end; | |
1703 | } | |
1704 | } | |
1705 | ||
1706 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1707 | ||
1708 | flat_probe_start = buffer->data + buffer->size; | |
1709 | flat_probe.parent.type = location->type; | |
1710 | ||
1711 | /* | |
1712 | * The lookup method, if present, is the last element in the flat | |
1713 | * representation of the probe. | |
1714 | */ | |
1715 | if (location->lookup_method) { | |
1716 | flat_probe.parent.lookup_method = | |
1717 | (struct lttng_userspace_probe_location_lookup_method *) | |
1718 | (flat_probe_start + sizeof(flat_probe) + | |
1719 | probe_name_len + provider_name_len + | |
1720 | binary_path_len + padding_needed); | |
1721 | } else { | |
1722 | flat_probe.parent.lookup_method = NULL; | |
1723 | } | |
1724 | ||
1725 | flat_probe.probe_name = flat_probe_start + sizeof(flat_probe); | |
1726 | flat_probe.provider_name = flat_probe.probe_name + probe_name_len; | |
1727 | flat_probe.binary_path = flat_probe.provider_name + provider_name_len; | |
1728 | flat_probe.binary_fd = -1; | |
1729 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, sizeof(flat_probe)); | |
1730 | if (ret) { | |
1731 | goto end; | |
1732 | } | |
1733 | ||
1734 | /* Append all the fields to the buffer */ | |
1735 | ret = lttng_dynamic_buffer_append(buffer, | |
1736 | probe_tracepoint->probe_name, probe_name_len); | |
1737 | if (ret) { | |
1738 | goto end; | |
1739 | } | |
1740 | ret = lttng_dynamic_buffer_append(buffer, | |
1741 | probe_tracepoint->provider_name, provider_name_len); | |
1742 | if (ret) { | |
1743 | goto end; | |
1744 | } | |
1745 | ret = lttng_dynamic_buffer_append(buffer, | |
1746 | probe_tracepoint->binary_path, binary_path_len); | |
1747 | if (ret) { | |
1748 | goto end; | |
1749 | } | |
1750 | ||
1751 | /* Insert padding before the lookup method. */ | |
1752 | ret = lttng_dynamic_buffer_set_size(buffer, buffer->size + padding_needed); | |
1753 | if (ret) { | |
1754 | goto end; | |
1755 | } | |
1756 | ||
1757 | if (!location->lookup_method) { | |
1758 | /* Not an error, the default method is used. */ | |
1759 | ret = storage_needed; | |
1760 | goto end; | |
1761 | } | |
1762 | ||
1763 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1764 | ||
1765 | flat_lookup_method.parent.type = | |
1766 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
1767 | ret = lttng_dynamic_buffer_append(buffer, | |
1768 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1769 | if (ret) { | |
1770 | goto end; | |
1771 | } | |
1772 | ret = storage_needed; | |
1773 | end: | |
1774 | return ret; | |
1775 | } | |
1776 | ||
1ce46cfe JG |
1777 | LTTNG_HIDDEN |
1778 | int lttng_userspace_probe_location_flatten( | |
1779 | const struct lttng_userspace_probe_location *location, | |
1780 | struct lttng_dynamic_buffer *buffer) | |
1781 | { | |
1782 | int ret; | |
1783 | if (!location) { | |
1784 | ret = -LTTNG_ERR_INVALID; | |
1785 | goto end; | |
1786 | } | |
1787 | ||
1788 | /* Only types currently supported. */ | |
1789 | switch (location->type) { | |
1790 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1791 | ret = lttng_userspace_probe_location_function_flatten(location, buffer); | |
1792 | break; | |
f4d0bb2e FD |
1793 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1794 | ret = lttng_userspace_probe_location_tracepoint_flatten(location, buffer); | |
1795 | break; | |
1ce46cfe JG |
1796 | default: |
1797 | ret = -LTTNG_ERR_INVALID; | |
1798 | goto end; | |
1799 | } | |
1800 | ||
1801 | end: | |
1802 | return ret; | |
1803 | } | |
394357fe FD |
1804 | |
1805 | LTTNG_HIDDEN | |
1806 | struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy( | |
1807 | const struct lttng_userspace_probe_location *location) | |
1808 | { | |
1809 | struct lttng_userspace_probe_location *new_location = NULL; | |
1810 | enum lttng_userspace_probe_location_type type; | |
1811 | ||
1812 | if (!location) { | |
1813 | goto err; | |
1814 | } | |
1815 | ||
1816 | type = lttng_userspace_probe_location_get_type(location); | |
1817 | switch (type) { | |
1818 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1819 | new_location = | |
1820 | lttng_userspace_probe_location_function_copy(location); | |
1821 | if (!new_location) { | |
1822 | goto err; | |
1823 | } | |
1824 | break; | |
f4d0bb2e FD |
1825 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1826 | new_location = | |
1827 | lttng_userspace_probe_location_tracepoint_copy(location); | |
1828 | if (!new_location) { | |
1829 | goto err; | |
1830 | } | |
1831 | break; | |
394357fe FD |
1832 | default: |
1833 | new_location = NULL; | |
1834 | goto err; | |
1835 | } | |
1836 | err: | |
1837 | return new_location; | |
1838 | } | |
dfcfa983 JR |
1839 | |
1840 | LTTNG_HIDDEN | |
1841 | bool lttng_userspace_probe_location_lookup_method_is_equal( | |
1842 | const struct lttng_userspace_probe_location_lookup_method *a, | |
1843 | const struct lttng_userspace_probe_location_lookup_method *b) | |
1844 | { | |
1845 | bool is_equal = false; | |
1846 | ||
1847 | if (!a || !b) { | |
1848 | goto end; | |
1849 | } | |
1850 | ||
1851 | if (a == b) { | |
1852 | is_equal = true; | |
1853 | goto end; | |
1854 | } | |
1855 | ||
1856 | if (a->type != b->type) { | |
1857 | goto end; | |
1858 | } | |
1859 | ||
1860 | is_equal = true; | |
1861 | end: | |
1862 | return is_equal; | |
1863 | } | |
1864 | ||
1865 | LTTNG_HIDDEN | |
1866 | bool lttng_userspace_probe_location_is_equal( | |
1867 | const struct lttng_userspace_probe_location *a, | |
1868 | const struct lttng_userspace_probe_location *b) | |
1869 | { | |
1870 | bool is_equal = false; | |
1871 | ||
1872 | if (!a || !b) { | |
1873 | goto end; | |
1874 | } | |
1875 | ||
1876 | if (a == b) { | |
1877 | is_equal = true; | |
1878 | goto end; | |
1879 | } | |
1880 | ||
1881 | if (!lttng_userspace_probe_location_lookup_method_is_equal( | |
1882 | a->lookup_method, b->lookup_method)) { | |
1883 | goto end; | |
1884 | } | |
1885 | ||
1886 | if (a->type != b->type) { | |
1887 | goto end; | |
1888 | } | |
1889 | ||
1890 | is_equal = a->equal ? a->equal(a, b) : true; | |
1891 | end: | |
1892 | return is_equal; | |
1893 | } |