Commit | Line | Data |
---|---|---|
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 | ||
e368fb43 | 8 | #include "lttng/lttng-error.h" |
1ce46cfe | 9 | #include <assert.h> |
dfcfa983 | 10 | #include <common/compat/string.h> |
1ce46cfe JG |
11 | #include <common/error.h> |
12 | #include <common/macros.h> | |
9e620ea7 JG |
13 | #include <common/payload.h> |
14 | #include <common/payload-view.h> | |
1ce46cfe JG |
15 | #include <fcntl.h> |
16 | #include <lttng/constant.h> | |
17 | #include <lttng/userspace-probe-internal.h> | |
dfcfa983 JR |
18 | #include <sys/stat.h> |
19 | #include <sys/types.h> | |
20 | #include <sys/unistd.h> | |
1ce46cfe JG |
21 | |
22 | enum lttng_userspace_probe_location_lookup_method_type | |
23 | lttng_userspace_probe_location_lookup_method_get_type( | |
24 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
25 | { | |
26 | return lookup_method ? lookup_method->type : | |
27 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_UNKNOWN; | |
28 | } | |
29 | ||
30 | void lttng_userspace_probe_location_lookup_method_destroy( | |
31 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
32 | { | |
33 | if (!lookup_method){ | |
34 | return; | |
35 | } | |
36 | ||
5d21f143 | 37 | free(lookup_method); |
1ce46cfe JG |
38 | } |
39 | ||
40 | struct lttng_userspace_probe_location_lookup_method * | |
41 | lttng_userspace_probe_location_lookup_method_function_elf_create(void) | |
42 | { | |
43 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
44 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
45 | ||
46 | elf_method = zmalloc(sizeof(*elf_method)); | |
47 | if (!elf_method) { | |
48 | PERROR("zmalloc"); | |
49 | goto end; | |
50 | } | |
51 | ||
52 | ret = &elf_method->parent; | |
53 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
54 | end: | |
55 | return ret; | |
56 | } | |
57 | ||
f4d0bb2e FD |
58 | struct lttng_userspace_probe_location_lookup_method * |
59 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(void) | |
60 | { | |
61 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
62 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
63 | ||
64 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
65 | if (!sdt_method) { | |
66 | PERROR("zmalloc"); | |
67 | goto end; | |
68 | } | |
69 | ||
70 | ret = &sdt_method->parent; | |
71 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
72 | end: | |
73 | return ret; | |
74 | } | |
75 | ||
1ce46cfe JG |
76 | enum lttng_userspace_probe_location_type lttng_userspace_probe_location_get_type( |
77 | const struct lttng_userspace_probe_location *location) | |
78 | { | |
79 | return location ? location->type : | |
80 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN; | |
81 | } | |
82 | ||
83 | static | |
84 | void lttng_userspace_probe_location_function_destroy( | |
85 | struct lttng_userspace_probe_location *location) | |
86 | { | |
87 | struct lttng_userspace_probe_location_function *location_function = NULL; | |
88 | ||
89 | assert(location); | |
90 | ||
91 | location_function = container_of(location, | |
92 | struct lttng_userspace_probe_location_function, parent); | |
93 | ||
94 | assert(location_function); | |
95 | ||
96 | free(location_function->function_name); | |
97 | free(location_function->binary_path); | |
98 | if (location_function->binary_fd >= 0) { | |
99 | if (close(location_function->binary_fd)) { | |
100 | PERROR("close"); | |
101 | } | |
102 | } | |
103 | free(location); | |
104 | } | |
105 | ||
f4d0bb2e FD |
106 | static |
107 | void lttng_userspace_probe_location_tracepoint_destroy( | |
108 | struct lttng_userspace_probe_location *location) | |
109 | { | |
110 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint = NULL; | |
111 | ||
112 | assert(location); | |
113 | ||
114 | location_tracepoint = container_of(location, | |
115 | struct lttng_userspace_probe_location_tracepoint, | |
116 | parent); | |
117 | ||
118 | assert(location_tracepoint); | |
119 | ||
120 | free(location_tracepoint->probe_name); | |
121 | free(location_tracepoint->provider_name); | |
122 | free(location_tracepoint->binary_path); | |
123 | if (location_tracepoint->binary_fd >= 0) { | |
124 | if (close(location_tracepoint->binary_fd)) { | |
125 | PERROR("close"); | |
126 | } | |
127 | } | |
128 | free(location); | |
129 | } | |
130 | ||
1ce46cfe JG |
131 | void lttng_userspace_probe_location_destroy( |
132 | struct lttng_userspace_probe_location *location) | |
133 | { | |
134 | if (!location) { | |
135 | return; | |
136 | } | |
137 | ||
138 | lttng_userspace_probe_location_lookup_method_destroy( | |
139 | location->lookup_method); | |
140 | ||
141 | switch (location->type) { | |
142 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
143 | lttng_userspace_probe_location_function_destroy(location); | |
144 | break; | |
f4d0bb2e FD |
145 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
146 | lttng_userspace_probe_location_tracepoint_destroy(location); | |
147 | break; | |
1ce46cfe | 148 | default: |
adf53c67 | 149 | abort(); |
1ce46cfe JG |
150 | } |
151 | } | |
152 | ||
dfcfa983 JR |
153 | /* Compare two file descriptors based on their inode and device numbers. */ |
154 | static bool fd_is_equal(int a, int b) | |
155 | { | |
156 | int ret; | |
157 | bool is_equal = false; | |
158 | struct stat a_stat, b_stat; | |
159 | ||
160 | if (a < 0 && b >= 0) { | |
161 | goto end; | |
162 | } | |
163 | ||
164 | if (b < 0 && a >= 0) { | |
165 | goto end; | |
166 | } | |
167 | ||
168 | if (a < 0 && b < 0) { | |
169 | if (a == -1 && b == -1) { | |
170 | is_equal = true; | |
171 | goto end; | |
172 | } | |
173 | ||
174 | /* Invalid state, abort. */ | |
175 | abort(); | |
176 | } | |
177 | ||
178 | /* Both are valid file descriptors. */ | |
179 | ret = fstat(a, &a_stat); | |
180 | if (ret) { | |
181 | PERROR("Failed to fstat userspace probe location binary fd %d", | |
182 | a); | |
183 | goto end; | |
184 | } | |
185 | ||
186 | ret = fstat(b, &b_stat); | |
187 | if (ret) { | |
188 | PERROR("Failed to fstat userspace probe location binary fd %d", | |
189 | b); | |
190 | goto end; | |
191 | } | |
192 | ||
193 | is_equal = (a_stat.st_ino == b_stat.st_ino) && | |
194 | (a_stat.st_dev == b_stat.st_dev); | |
195 | ||
196 | end: | |
197 | return is_equal; | |
198 | } | |
199 | ||
200 | static bool lttng_userspace_probe_location_function_is_equal( | |
201 | const struct lttng_userspace_probe_location *_a, | |
202 | const struct lttng_userspace_probe_location *_b) | |
203 | { | |
204 | bool is_equal = false; | |
205 | struct lttng_userspace_probe_location_function *a, *b; | |
206 | ||
207 | a = container_of(_a, struct lttng_userspace_probe_location_function, | |
208 | parent); | |
209 | b = container_of(_b, struct lttng_userspace_probe_location_function, | |
210 | parent); | |
211 | ||
212 | if (a->instrumentation_type != b->instrumentation_type) { | |
213 | goto end; | |
214 | } | |
215 | ||
216 | assert(a->function_name); | |
217 | assert(b->function_name); | |
218 | if (strcmp(a->function_name, b->function_name)) { | |
219 | goto end; | |
220 | } | |
221 | ||
222 | assert(a->binary_path); | |
223 | assert(b->binary_path); | |
224 | if (strcmp(a->binary_path, b->binary_path)) { | |
225 | goto end; | |
226 | } | |
227 | ||
228 | is_equal = fd_is_equal(a->binary_fd, b->binary_fd); | |
229 | end: | |
230 | return is_equal; | |
231 | } | |
232 | ||
1ce46cfe JG |
233 | static struct lttng_userspace_probe_location * |
234 | lttng_userspace_probe_location_function_create_no_check(const char *binary_path, | |
235 | const char *function_name, | |
236 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
237 | bool open_binary) | |
238 | { | |
239 | int binary_fd = -1; | |
240 | char *function_name_copy = NULL, *binary_path_copy = NULL; | |
241 | struct lttng_userspace_probe_location *ret = NULL; | |
242 | struct lttng_userspace_probe_location_function *location; | |
243 | ||
244 | if (open_binary) { | |
245 | binary_fd = open(binary_path, O_RDONLY); | |
246 | if (binary_fd < 0) { | |
247 | PERROR("Error opening the binary"); | |
248 | goto error; | |
249 | } | |
250 | } else { | |
251 | binary_fd = -1; | |
252 | } | |
253 | ||
254 | function_name_copy = lttng_strndup(function_name, LTTNG_SYMBOL_NAME_LEN); | |
255 | if (!function_name_copy) { | |
256 | PERROR("Error duplicating the function name"); | |
257 | goto error; | |
258 | } | |
259 | ||
260 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
261 | if (!binary_path_copy) { | |
262 | PERROR("Error duplicating the function name"); | |
263 | goto error; | |
264 | } | |
265 | ||
266 | location = zmalloc(sizeof(*location)); | |
267 | if (!location) { | |
268 | PERROR("Error allocating userspace probe location"); | |
269 | goto error; | |
270 | } | |
271 | ||
272 | location->function_name = function_name_copy; | |
273 | location->binary_path = binary_path_copy; | |
274 | location->binary_fd = binary_fd; | |
9d3981b5 JG |
275 | location->instrumentation_type = |
276 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY; | |
1ce46cfe JG |
277 | |
278 | ret = &location->parent; | |
279 | ret->lookup_method = lookup_method; | |
280 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION; | |
dfcfa983 | 281 | ret->equal = lttng_userspace_probe_location_function_is_equal; |
1ce46cfe JG |
282 | goto end; |
283 | ||
284 | error: | |
285 | free(function_name_copy); | |
286 | free(binary_path_copy); | |
287 | if (binary_fd >= 0) { | |
288 | if (close(binary_fd)) { | |
289 | PERROR("Error closing binary fd in error path"); | |
290 | } | |
291 | } | |
292 | end: | |
293 | return ret; | |
294 | } | |
295 | ||
dfcfa983 JR |
296 | static bool lttng_userspace_probe_location_tracepoint_is_equal( |
297 | const struct lttng_userspace_probe_location *_a, | |
298 | const struct lttng_userspace_probe_location *_b) | |
299 | { | |
300 | bool is_equal = false; | |
301 | struct lttng_userspace_probe_location_tracepoint *a, *b; | |
302 | ||
303 | a = container_of(_a, struct lttng_userspace_probe_location_tracepoint, | |
304 | parent); | |
305 | b = container_of(_b, struct lttng_userspace_probe_location_tracepoint, | |
306 | parent); | |
307 | ||
308 | assert(a->probe_name); | |
309 | assert(b->probe_name); | |
310 | if (strcmp(a->probe_name, b->probe_name)) { | |
311 | goto end; | |
312 | } | |
313 | ||
314 | assert(a->provider_name); | |
315 | assert(b->provider_name); | |
316 | if (strcmp(a->provider_name, b->provider_name)) { | |
317 | goto end; | |
318 | } | |
319 | ||
320 | assert(a->binary_path); | |
321 | assert(b->binary_path); | |
322 | if (strcmp(a->binary_path, b->binary_path)) { | |
323 | goto end; | |
324 | } | |
325 | ||
326 | is_equal = fd_is_equal(a->binary_fd, b->binary_fd); | |
327 | ||
328 | end: | |
329 | return is_equal; | |
330 | } | |
331 | ||
f4d0bb2e FD |
332 | static struct lttng_userspace_probe_location * |
333 | lttng_userspace_probe_location_tracepoint_create_no_check(const char *binary_path, | |
334 | const char *provider_name, const char *probe_name, | |
335 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
336 | bool open_binary) | |
337 | { | |
338 | int binary_fd = -1; | |
339 | char *probe_name_copy = NULL; | |
340 | char *provider_name_copy = NULL; | |
341 | char *binary_path_copy = NULL; | |
342 | struct lttng_userspace_probe_location *ret = NULL; | |
343 | struct lttng_userspace_probe_location_tracepoint *location; | |
344 | ||
345 | if (open_binary) { | |
346 | binary_fd = open(binary_path, O_RDONLY); | |
347 | if (binary_fd < 0) { | |
348 | PERROR("open"); | |
349 | goto error; | |
350 | } | |
351 | } else { | |
352 | binary_fd = -1; | |
353 | } | |
354 | ||
355 | probe_name_copy = lttng_strndup(probe_name, LTTNG_SYMBOL_NAME_LEN); | |
356 | if (!probe_name_copy) { | |
357 | PERROR("lttng_strndup"); | |
358 | goto error; | |
359 | } | |
360 | ||
361 | provider_name_copy = lttng_strndup(provider_name, LTTNG_SYMBOL_NAME_LEN); | |
362 | if (!provider_name_copy) { | |
363 | PERROR("lttng_strndup"); | |
364 | goto error; | |
365 | } | |
366 | ||
367 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
368 | if (!binary_path_copy) { | |
369 | PERROR("lttng_strndup"); | |
370 | goto error; | |
371 | } | |
372 | ||
373 | location = zmalloc(sizeof(*location)); | |
374 | if (!location) { | |
375 | PERROR("zmalloc"); | |
376 | goto error; | |
377 | } | |
378 | ||
379 | location->probe_name = probe_name_copy; | |
380 | location->provider_name = provider_name_copy; | |
381 | location->binary_path = binary_path_copy; | |
382 | location->binary_fd = binary_fd; | |
383 | ||
384 | ret = &location->parent; | |
385 | ret->lookup_method = lookup_method; | |
386 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT; | |
dfcfa983 | 387 | ret->equal = lttng_userspace_probe_location_tracepoint_is_equal; |
f4d0bb2e FD |
388 | goto end; |
389 | ||
390 | error: | |
391 | free(probe_name_copy); | |
392 | free(provider_name_copy); | |
7c86453b | 393 | free(binary_path_copy); |
f4d0bb2e FD |
394 | if (binary_fd >= 0) { |
395 | if (close(binary_fd)) { | |
396 | PERROR("Error closing binary fd in error path"); | |
397 | } | |
398 | } | |
399 | end: | |
400 | return ret; | |
401 | } | |
402 | ||
1ce46cfe JG |
403 | struct lttng_userspace_probe_location * |
404 | lttng_userspace_probe_location_function_create(const char *binary_path, | |
405 | const char *function_name, | |
406 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
407 | { | |
408 | struct lttng_userspace_probe_location *ret = NULL; | |
409 | ||
410 | if (!binary_path || !function_name) { | |
411 | ERR("Invalid argument(s)"); | |
412 | goto end; | |
413 | } | |
414 | ||
415 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
416 | lookup_method)) { | |
417 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
418 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
419 | break; | |
420 | default: | |
421 | /* Invalid probe location lookup method. */ | |
422 | goto end; | |
423 | } | |
424 | ||
425 | ret = lttng_userspace_probe_location_function_create_no_check( | |
426 | binary_path, function_name, lookup_method, true); | |
427 | end: | |
428 | return ret; | |
429 | } | |
430 | ||
f4d0bb2e FD |
431 | struct lttng_userspace_probe_location * |
432 | lttng_userspace_probe_location_tracepoint_create(const char *binary_path, | |
433 | const char *provider_name, const char *probe_name, | |
434 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
435 | { | |
436 | struct lttng_userspace_probe_location *ret = NULL; | |
437 | ||
438 | if (!binary_path || !probe_name || !provider_name) { | |
439 | ERR("Invalid argument(s)"); | |
440 | goto end; | |
441 | } | |
442 | ||
443 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
444 | lookup_method)) { | |
445 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
446 | break; | |
447 | default: | |
448 | /* Invalid probe location lookup method. */ | |
449 | goto end; | |
450 | } | |
451 | ||
452 | ret = lttng_userspace_probe_location_tracepoint_create_no_check( | |
453 | binary_path, provider_name, probe_name, lookup_method, true); | |
454 | end: | |
455 | return ret; | |
456 | } | |
457 | ||
394357fe FD |
458 | static struct lttng_userspace_probe_location_lookup_method * |
459 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
460 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
461 | { | |
462 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
463 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
464 | ||
465 | assert(lookup_method); | |
466 | assert(lookup_method->type == | |
467 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF); | |
468 | ||
469 | elf_method = zmalloc(sizeof(*elf_method)); | |
470 | if (!elf_method) { | |
471 | PERROR("Error allocating ELF userspace probe lookup method"); | |
472 | goto error; | |
473 | } | |
474 | ||
475 | elf_method->parent.type = lookup_method->type; | |
476 | parent = &elf_method->parent; | |
477 | ||
478 | goto end; | |
479 | error: | |
480 | parent = NULL; | |
481 | end: | |
482 | return parent; | |
483 | } | |
484 | ||
f4d0bb2e FD |
485 | static struct lttng_userspace_probe_location_lookup_method * |
486 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
487 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
488 | { | |
489 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
490 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
491 | ||
492 | assert(lookup_method); | |
493 | assert(lookup_method->type == | |
494 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT); | |
495 | ||
496 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
497 | if (!sdt_method) { | |
498 | PERROR("zmalloc"); | |
499 | goto error; | |
500 | } | |
501 | ||
502 | sdt_method->parent.type = lookup_method->type; | |
503 | parent = &sdt_method->parent; | |
504 | ||
505 | goto end; | |
506 | ||
507 | error: | |
508 | parent = NULL; | |
509 | end: | |
510 | return parent; | |
511 | } | |
512 | ||
394357fe FD |
513 | static struct lttng_userspace_probe_location * |
514 | lttng_userspace_probe_location_function_copy( | |
515 | const struct lttng_userspace_probe_location *location) | |
516 | { | |
517 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
518 | struct lttng_userspace_probe_location *new_location = NULL; | |
519 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
520 | const char *binary_path = NULL; |
521 | const char *function_name = NULL; | |
d7ee7196 | 522 | int fd, new_fd; |
394357fe FD |
523 | |
524 | assert(location); | |
525 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
526 | ||
cc831309 FD |
527 | /* Get probe location fields */ |
528 | binary_path = lttng_userspace_probe_location_function_get_binary_path(location); | |
394357fe | 529 | if (!binary_path) { |
cc831309 | 530 | ERR("Userspace probe binary path is NULL"); |
394357fe FD |
531 | goto error; |
532 | } | |
533 | ||
cc831309 | 534 | function_name = lttng_userspace_probe_location_function_get_function_name(location); |
394357fe | 535 | if (!function_name) { |
cc831309 | 536 | ERR("Userspace probe function name is NULL"); |
394357fe FD |
537 | goto error; |
538 | } | |
539 | ||
540 | /* Duplicate the binary fd */ | |
d7ee7196 | 541 | fd = lttng_userspace_probe_location_function_get_binary_fd(location); |
394357fe | 542 | if (fd == -1) { |
d7ee7196 FD |
543 | ERR("Error getting file descriptor to binary"); |
544 | goto error; | |
545 | } | |
546 | ||
547 | new_fd = dup(fd); | |
548 | if (new_fd == -1) { | |
394357fe FD |
549 | PERROR("Error duplicating file descriptor to binary"); |
550 | goto error; | |
551 | } | |
552 | ||
553 | /* | |
554 | * Duplicate probe location method fields | |
555 | */ | |
556 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
557 | location->lookup_method); | |
558 | switch (lookup_type) { | |
559 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
560 | lookup_method = | |
561 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
562 | location->lookup_method); | |
563 | if (!lookup_method) { | |
564 | goto close_fd; | |
565 | } | |
566 | break; | |
567 | default: | |
568 | /* Invalid probe location lookup method. */ | |
569 | goto close_fd; | |
570 | } | |
571 | ||
572 | /* Create the probe_location */ | |
573 | new_location = lttng_userspace_probe_location_function_create_no_check( | |
cc831309 | 574 | binary_path, function_name, lookup_method, false); |
394357fe FD |
575 | if (!new_location) { |
576 | goto destroy_lookup_method; | |
577 | } | |
578 | ||
579 | /* Set the duplicated fd to the new probe_location */ | |
d7ee7196 | 580 | if (lttng_userspace_probe_location_function_set_binary_fd(new_location, new_fd) < 0) { |
394357fe FD |
581 | goto destroy_probe_location; |
582 | } | |
583 | ||
584 | goto end; | |
585 | ||
586 | destroy_probe_location: | |
587 | lttng_userspace_probe_location_destroy(new_location); | |
588 | destroy_lookup_method: | |
589 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
590 | close_fd: | |
d7ee7196 | 591 | if (close(new_fd) < 0) { |
394357fe FD |
592 | PERROR("Error closing duplicated file descriptor in error path"); |
593 | } | |
594 | error: | |
394357fe FD |
595 | new_location = NULL; |
596 | end: | |
597 | return new_location; | |
598 | } | |
599 | ||
f4d0bb2e FD |
600 | static struct lttng_userspace_probe_location * |
601 | lttng_userspace_probe_location_tracepoint_copy( | |
602 | const struct lttng_userspace_probe_location *location) | |
603 | { | |
604 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
605 | struct lttng_userspace_probe_location *new_location = NULL; | |
606 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
607 | const char *binary_path = NULL; |
608 | const char *probe_name = NULL; | |
609 | const char *provider_name = NULL; | |
d7ee7196 | 610 | int fd, new_fd; |
f4d0bb2e FD |
611 | |
612 | assert(location); | |
613 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
614 | ||
cc831309 FD |
615 | /* Get probe location fields */ |
616 | binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location); | |
f4d0bb2e | 617 | if (!binary_path) { |
cc831309 | 618 | ERR("Userspace probe binary path is NULL"); |
f4d0bb2e FD |
619 | goto error; |
620 | } | |
621 | ||
cc831309 | 622 | probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location); |
f4d0bb2e | 623 | if (!probe_name) { |
cc831309 | 624 | ERR("Userspace probe probe name is NULL"); |
f4d0bb2e FD |
625 | goto error; |
626 | } | |
627 | ||
cc831309 | 628 | provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location); |
f4d0bb2e | 629 | if (!provider_name) { |
cc831309 | 630 | ERR("Userspace probe provider name is NULL"); |
f4d0bb2e FD |
631 | goto error; |
632 | } | |
633 | ||
634 | /* Duplicate the binary fd */ | |
d7ee7196 | 635 | fd = lttng_userspace_probe_location_tracepoint_get_binary_fd(location); |
f4d0bb2e | 636 | if (fd == -1) { |
d7ee7196 FD |
637 | ERR("Error getting file descriptor to binary"); |
638 | goto error; | |
639 | } | |
640 | ||
641 | new_fd = dup(fd); | |
642 | if (new_fd == -1) { | |
cc831309 | 643 | PERROR("Error duplicating file descriptor to binary"); |
f4d0bb2e FD |
644 | goto error; |
645 | } | |
646 | ||
647 | /* | |
648 | * Duplicate probe location method fields | |
649 | */ | |
650 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
651 | location->lookup_method); | |
652 | switch (lookup_type) { | |
653 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
654 | lookup_method = | |
655 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
656 | location->lookup_method); | |
657 | if (!lookup_method) { | |
658 | goto close_fd; | |
659 | } | |
660 | break; | |
661 | default: | |
662 | /* Invalid probe location lookup method. */ | |
663 | goto close_fd; | |
664 | } | |
665 | ||
666 | /* Create the probe_location */ | |
667 | new_location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
cc831309 | 668 | binary_path, provider_name, probe_name, lookup_method, false); |
f4d0bb2e FD |
669 | if (!new_location) { |
670 | goto destroy_lookup_method; | |
671 | } | |
672 | ||
673 | /* Set the duplicated fd to the new probe_location */ | |
d7ee7196 | 674 | if (lttng_userspace_probe_location_tracepoint_set_binary_fd(new_location, new_fd) < 0) { |
f4d0bb2e FD |
675 | goto destroy_probe_location; |
676 | } | |
677 | ||
678 | goto end; | |
679 | ||
680 | destroy_probe_location: | |
681 | lttng_userspace_probe_location_destroy(new_location); | |
682 | destroy_lookup_method: | |
683 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
684 | close_fd: | |
d7ee7196 | 685 | if (close(new_fd) < 0) { |
cc831309 | 686 | PERROR("Error closing duplicated file descriptor in error path"); |
f4d0bb2e FD |
687 | } |
688 | error: | |
f4d0bb2e FD |
689 | new_location = NULL; |
690 | end: | |
691 | return new_location; | |
692 | } | |
693 | ||
1ce46cfe JG |
694 | const char *lttng_userspace_probe_location_function_get_binary_path( |
695 | const struct lttng_userspace_probe_location *location) | |
696 | { | |
697 | const char *ret = NULL; | |
698 | struct lttng_userspace_probe_location_function *function_location; | |
699 | ||
700 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
701 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
702 | ERR("Invalid argument(s)"); | |
703 | goto end; | |
704 | } | |
705 | ||
706 | function_location = container_of(location, | |
707 | struct lttng_userspace_probe_location_function, | |
708 | parent); | |
709 | ret = function_location->binary_path; | |
710 | end: | |
711 | return ret; | |
712 | } | |
713 | ||
f4d0bb2e FD |
714 | const char *lttng_userspace_probe_location_tracepoint_get_binary_path( |
715 | const struct lttng_userspace_probe_location *location) | |
716 | { | |
717 | const char *ret = NULL; | |
718 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
719 | ||
720 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
721 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
722 | ERR("Invalid argument(s)"); | |
723 | goto end; | |
724 | } | |
725 | ||
726 | tracepoint_location = container_of(location, | |
727 | struct lttng_userspace_probe_location_tracepoint, | |
728 | parent); | |
729 | ret = tracepoint_location->binary_path; | |
730 | end: | |
731 | return ret; | |
732 | } | |
733 | ||
1ce46cfe JG |
734 | const char *lttng_userspace_probe_location_function_get_function_name( |
735 | const struct lttng_userspace_probe_location *location) | |
736 | { | |
737 | const char *ret = NULL; | |
738 | struct lttng_userspace_probe_location_function *function_location; | |
739 | ||
740 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
741 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
742 | ERR("Invalid argument(s)"); | |
743 | goto end; | |
744 | } | |
745 | ||
746 | function_location = container_of(location, | |
747 | struct lttng_userspace_probe_location_function, parent); | |
748 | ret = function_location->function_name; | |
749 | end: | |
750 | return ret; | |
751 | } | |
752 | ||
f4d0bb2e FD |
753 | const char *lttng_userspace_probe_location_tracepoint_get_probe_name( |
754 | const struct lttng_userspace_probe_location *location) | |
755 | { | |
756 | const char *ret = NULL; | |
757 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
758 | ||
759 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
760 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
761 | ERR("Invalid argument(s)"); | |
762 | goto end; | |
763 | } | |
764 | ||
765 | tracepoint_location = container_of(location, | |
766 | struct lttng_userspace_probe_location_tracepoint, parent); | |
767 | ret = tracepoint_location->probe_name; | |
768 | end: | |
769 | return ret; | |
770 | } | |
771 | ||
772 | const char *lttng_userspace_probe_location_tracepoint_get_provider_name( | |
773 | const struct lttng_userspace_probe_location *location) | |
774 | { | |
775 | const char *ret = NULL; | |
776 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
777 | ||
778 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
779 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
780 | ERR("Invalid argument(s)"); | |
781 | goto end; | |
782 | } | |
783 | ||
784 | tracepoint_location = container_of(location, | |
785 | struct lttng_userspace_probe_location_tracepoint, parent); | |
786 | ret = tracepoint_location->provider_name; | |
787 | end: | |
788 | return ret; | |
789 | } | |
790 | ||
1ce46cfe JG |
791 | int lttng_userspace_probe_location_function_get_binary_fd( |
792 | const struct lttng_userspace_probe_location *location) | |
793 | { | |
794 | int ret = -1; | |
795 | struct lttng_userspace_probe_location_function *function_location; | |
796 | ||
797 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
798 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
799 | ERR("Invalid argument(s)"); | |
800 | goto end; | |
801 | } | |
802 | ||
803 | function_location = container_of(location, | |
804 | struct lttng_userspace_probe_location_function, parent); | |
805 | ret = function_location->binary_fd; | |
806 | end: | |
807 | return ret; | |
808 | } | |
809 | ||
9d3981b5 JG |
810 | enum lttng_userspace_probe_location_function_instrumentation_type |
811 | lttng_userspace_probe_location_function_get_instrumentation_type( | |
812 | const struct lttng_userspace_probe_location *location) | |
813 | { | |
814 | enum lttng_userspace_probe_location_function_instrumentation_type type; | |
815 | struct lttng_userspace_probe_location_function *function_location; | |
816 | ||
817 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
818 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
819 | ERR("Invalid argument(s)"); | |
820 | type = LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_UNKNOWN; | |
821 | goto end; | |
822 | } | |
823 | ||
824 | function_location = container_of(location, | |
825 | struct lttng_userspace_probe_location_function, parent); | |
826 | type = function_location->instrumentation_type; | |
827 | end: | |
828 | return type; | |
829 | } | |
830 | ||
831 | enum lttng_userspace_probe_location_status | |
832 | lttng_userspace_probe_location_function_set_instrumentation_type( | |
833 | const struct lttng_userspace_probe_location *location, | |
834 | enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type) | |
835 | { | |
836 | enum lttng_userspace_probe_location_status status = | |
837 | LTTNG_USERSPACE_PROBE_LOCATION_STATUS_OK; | |
838 | struct lttng_userspace_probe_location_function *function_location; | |
839 | ||
840 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
841 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION || | |
842 | instrumentation_type != | |
843 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY) { | |
844 | ERR("Invalid argument(s)"); | |
845 | status = LTTNG_USERSPACE_PROBE_LOCATION_STATUS_INVALID; | |
846 | goto end; | |
847 | } | |
848 | ||
849 | function_location = container_of(location, | |
850 | struct lttng_userspace_probe_location_function, parent); | |
851 | function_location->instrumentation_type = instrumentation_type; | |
852 | end: | |
853 | return status; | |
854 | } | |
855 | ||
f4d0bb2e FD |
856 | int lttng_userspace_probe_location_tracepoint_get_binary_fd( |
857 | const struct lttng_userspace_probe_location *location) | |
858 | { | |
859 | int ret = -1; | |
860 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
861 | ||
862 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
863 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
864 | ERR("Invalid argument(s)"); | |
865 | goto end; | |
866 | } | |
867 | ||
868 | tracepoint_location = container_of(location, | |
869 | struct lttng_userspace_probe_location_tracepoint, parent); | |
870 | ret = tracepoint_location->binary_fd; | |
871 | end: | |
872 | return ret; | |
873 | } | |
874 | ||
1ce46cfe JG |
875 | static struct lttng_userspace_probe_location_lookup_method * |
876 | lttng_userspace_probe_location_function_get_lookup_method( | |
877 | const struct lttng_userspace_probe_location *location) | |
878 | { | |
879 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
880 | ||
881 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
882 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
883 | ERR("Invalid argument(s)"); | |
884 | goto end; | |
885 | } | |
886 | ||
887 | ret = location->lookup_method; | |
888 | end: | |
889 | return ret; | |
890 | } | |
891 | ||
f4d0bb2e FD |
892 | static struct lttng_userspace_probe_location_lookup_method * |
893 | lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
894 | const struct lttng_userspace_probe_location *location) | |
895 | { | |
896 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
897 | ||
898 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
899 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
900 | ERR("Invalid argument(s)"); | |
901 | goto end; | |
902 | } | |
903 | ||
904 | ret = location->lookup_method; | |
905 | end: | |
906 | return ret; | |
907 | } | |
908 | ||
87597c2c | 909 | const struct lttng_userspace_probe_location_lookup_method * |
1ce46cfe JG |
910 | lttng_userspace_probe_location_get_lookup_method( |
911 | const struct lttng_userspace_probe_location *location) | |
912 | { | |
913 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
914 | ||
915 | assert(location); | |
916 | switch (location->type) { | |
917 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
918 | ret = lttng_userspace_probe_location_function_get_lookup_method( | |
919 | location); | |
920 | break; | |
f4d0bb2e FD |
921 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
922 | ret = lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
923 | location); | |
924 | break; | |
1ce46cfe JG |
925 | default: |
926 | ERR("Unknowned lookup method."); | |
927 | break; | |
928 | } | |
929 | return ret; | |
930 | } | |
931 | ||
932 | static | |
933 | int lttng_userspace_probe_location_lookup_method_serialize( | |
934 | struct lttng_userspace_probe_location_lookup_method *method, | |
e368fb43 | 935 | struct lttng_payload *payload) |
1ce46cfe JG |
936 | { |
937 | int ret; | |
938 | struct lttng_userspace_probe_location_lookup_method_comm | |
939 | lookup_method_comm; | |
940 | ||
941 | lookup_method_comm.type = (int8_t) (method ? method->type : | |
942 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT); | |
e368fb43 JG |
943 | if (payload) { |
944 | ret = lttng_dynamic_buffer_append(&payload->buffer, &lookup_method_comm, | |
1ce46cfe JG |
945 | sizeof(lookup_method_comm)); |
946 | if (ret) { | |
947 | goto end; | |
948 | } | |
949 | } | |
f4d0bb2e FD |
950 | ret = sizeof(lookup_method_comm); |
951 | end: | |
952 | return ret; | |
953 | } | |
954 | ||
955 | static | |
956 | int lttng_userspace_probe_location_function_serialize( | |
957 | const struct lttng_userspace_probe_location *location, | |
e368fb43 | 958 | struct lttng_payload *payload) |
f4d0bb2e 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 | ||
e368fb43 | 977 | if (payload && location_function->binary_fd < 0) { |
f4d0bb2e FD |
978 | ret = -LTTNG_ERR_INVALID; |
979 | goto end; | |
980 | } | |
981 | ||
f4d0bb2e FD |
982 | function_name_len = strlen(location_function->function_name); |
983 | if (function_name_len == 0) { | |
984 | ret = -LTTNG_ERR_INVALID; | |
985 | goto end; | |
986 | } | |
987 | binary_path_len = strlen(location_function->binary_path); | |
988 | if (binary_path_len == 0) { | |
989 | ret = -LTTNG_ERR_INVALID; | |
990 | goto end; | |
991 | } | |
992 | ||
993 | location_function_comm.function_name_len = function_name_len + 1; | |
994 | location_function_comm.binary_path_len = binary_path_len + 1; | |
995 | ||
e368fb43 JG |
996 | if (payload) { |
997 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
f4d0bb2e FD |
998 | &location_function_comm, |
999 | sizeof(location_function_comm)); | |
1000 | if (ret) { | |
1001 | ret = -LTTNG_ERR_INVALID; | |
1002 | goto end; | |
1003 | } | |
e368fb43 | 1004 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1005 | location_function->function_name, |
1006 | location_function_comm.function_name_len); | |
1007 | if (ret) { | |
1008 | ret = -LTTNG_ERR_INVALID; | |
1009 | goto end; | |
1010 | } | |
e368fb43 | 1011 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1012 | location_function->binary_path, |
1013 | location_function_comm.binary_path_len); | |
1014 | if (ret) { | |
1015 | ret = -LTTNG_ERR_INVALID; | |
1016 | goto end; | |
1017 | } | |
e368fb43 JG |
1018 | ret = lttng_payload_push_fd( |
1019 | payload, location_function->binary_fd); | |
1020 | if (ret) { | |
1021 | ret = -LTTNG_ERR_INVALID; | |
1022 | goto end; | |
1023 | } | |
f4d0bb2e FD |
1024 | } |
1025 | ret = sizeof(location_function_comm) + | |
1026 | location_function_comm.function_name_len + | |
1027 | location_function_comm.binary_path_len; | |
1ce46cfe JG |
1028 | end: |
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | static | |
f4d0bb2e | 1033 | int lttng_userspace_probe_location_tracepoint_serialize( |
1ce46cfe | 1034 | const struct lttng_userspace_probe_location *location, |
e368fb43 | 1035 | struct lttng_payload *payload) |
1ce46cfe JG |
1036 | { |
1037 | int ret; | |
f4d0bb2e FD |
1038 | size_t probe_name_len, provider_name_len, binary_path_len; |
1039 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint; | |
1040 | struct lttng_userspace_probe_location_tracepoint_comm location_tracepoint_comm; | |
1ce46cfe JG |
1041 | |
1042 | assert(location); | |
1043 | assert(lttng_userspace_probe_location_get_type(location) == | |
f4d0bb2e | 1044 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
1ce46cfe | 1045 | |
f4d0bb2e FD |
1046 | location_tracepoint = container_of(location, |
1047 | struct lttng_userspace_probe_location_tracepoint, | |
1ce46cfe | 1048 | parent); |
f4d0bb2e FD |
1049 | if (!location_tracepoint->probe_name || |
1050 | !location_tracepoint->provider_name || | |
1051 | !location_tracepoint->binary_path) { | |
1ce46cfe JG |
1052 | ret = -LTTNG_ERR_INVALID; |
1053 | goto end; | |
1054 | } | |
1055 | ||
e368fb43 | 1056 | if (payload && location_tracepoint->binary_fd < 0) { |
1ce46cfe JG |
1057 | ret = -LTTNG_ERR_INVALID; |
1058 | goto end; | |
1059 | } | |
1060 | ||
f4d0bb2e FD |
1061 | probe_name_len = strlen(location_tracepoint->probe_name); |
1062 | if (probe_name_len == 0) { | |
1ce46cfe JG |
1063 | ret = -LTTNG_ERR_INVALID; |
1064 | goto end; | |
1065 | } | |
f4d0bb2e FD |
1066 | |
1067 | provider_name_len = strlen(location_tracepoint->provider_name); | |
1068 | if (provider_name_len == 0) { | |
1069 | ret = -LTTNG_ERR_INVALID; | |
1070 | goto end; | |
1071 | } | |
1072 | ||
1073 | binary_path_len = strlen(location_tracepoint->binary_path); | |
1ce46cfe JG |
1074 | if (binary_path_len == 0) { |
1075 | ret = -LTTNG_ERR_INVALID; | |
1076 | goto end; | |
1077 | } | |
1078 | ||
f4d0bb2e FD |
1079 | location_tracepoint_comm.probe_name_len = probe_name_len + 1; |
1080 | location_tracepoint_comm.provider_name_len = provider_name_len + 1; | |
1081 | location_tracepoint_comm.binary_path_len = binary_path_len + 1; | |
1ce46cfe | 1082 | |
e368fb43 JG |
1083 | if (payload) { |
1084 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
f4d0bb2e FD |
1085 | &location_tracepoint_comm, |
1086 | sizeof(location_tracepoint_comm)); | |
1ce46cfe JG |
1087 | if (ret) { |
1088 | ret = -LTTNG_ERR_INVALID; | |
1089 | goto end; | |
1090 | } | |
e368fb43 | 1091 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1092 | location_tracepoint->probe_name, |
1093 | location_tracepoint_comm.probe_name_len); | |
1ce46cfe JG |
1094 | if (ret) { |
1095 | ret = -LTTNG_ERR_INVALID; | |
1096 | goto end; | |
1097 | } | |
e368fb43 | 1098 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1099 | location_tracepoint->provider_name, |
1100 | location_tracepoint_comm.provider_name_len); | |
1101 | if (ret) { | |
1102 | ret = -LTTNG_ERR_INVALID; | |
1103 | goto end; | |
1104 | } | |
e368fb43 | 1105 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1106 | location_tracepoint->binary_path, |
1107 | location_tracepoint_comm.binary_path_len); | |
1ce46cfe JG |
1108 | if (ret) { |
1109 | ret = -LTTNG_ERR_INVALID; | |
1110 | goto end; | |
1111 | } | |
e368fb43 JG |
1112 | ret = lttng_payload_push_fd( |
1113 | payload, location_tracepoint->binary_fd); | |
1114 | if (ret) { | |
1115 | ret = -LTTNG_ERR_INVALID; | |
1116 | goto end; | |
1117 | } | |
1ce46cfe | 1118 | } |
e368fb43 | 1119 | |
f4d0bb2e FD |
1120 | ret = sizeof(location_tracepoint_comm) + |
1121 | location_tracepoint_comm.probe_name_len + | |
1122 | location_tracepoint_comm.provider_name_len + | |
1123 | location_tracepoint_comm.binary_path_len; | |
1ce46cfe JG |
1124 | end: |
1125 | return ret; | |
1126 | } | |
1127 | ||
1128 | LTTNG_HIDDEN | |
1129 | int lttng_userspace_probe_location_serialize( | |
1130 | const struct lttng_userspace_probe_location *location, | |
e368fb43 | 1131 | struct lttng_payload *payload) |
1ce46cfe JG |
1132 | { |
1133 | int ret, buffer_use = 0; | |
1134 | struct lttng_userspace_probe_location_comm location_generic_comm; | |
1135 | ||
1136 | if (!location) { | |
1137 | ERR("Invalid argument(s)"); | |
1138 | ret = -LTTNG_ERR_INVALID; | |
1139 | goto end; | |
1140 | } | |
1141 | ||
56f0bc67 JG |
1142 | memset(&location_generic_comm, 0, sizeof(location_generic_comm)); |
1143 | ||
1ce46cfe | 1144 | location_generic_comm.type = (int8_t) location->type; |
e368fb43 JG |
1145 | if (payload) { |
1146 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
1147 | &location_generic_comm, | |
1ce46cfe JG |
1148 | sizeof(location_generic_comm)); |
1149 | if (ret) { | |
1150 | goto end; | |
1151 | } | |
1152 | } | |
1153 | buffer_use += sizeof(location_generic_comm); | |
1154 | ||
1155 | switch (lttng_userspace_probe_location_get_type(location)) { | |
1156 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1157 | ret = lttng_userspace_probe_location_function_serialize( | |
e368fb43 | 1158 | location, payload); |
1ce46cfe | 1159 | break; |
f4d0bb2e FD |
1160 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1161 | ret = lttng_userspace_probe_location_tracepoint_serialize( | |
e368fb43 | 1162 | location, payload); |
f4d0bb2e | 1163 | break; |
1ce46cfe JG |
1164 | default: |
1165 | ERR("Unsupported probe location type"); | |
1166 | ret = -LTTNG_ERR_INVALID; | |
1167 | goto end; | |
1168 | } | |
1169 | if (ret < 0) { | |
1170 | goto end; | |
1171 | } | |
1172 | buffer_use += ret; | |
1173 | ||
1174 | ret = lttng_userspace_probe_location_lookup_method_serialize( | |
e368fb43 | 1175 | location->lookup_method, payload); |
1ce46cfe JG |
1176 | if (ret < 0) { |
1177 | goto end; | |
1178 | } | |
1179 | ret += buffer_use; | |
1180 | end: | |
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | static | |
e368fb43 JG |
1185 | int lttng_userspace_probe_location_function_create_from_payload( |
1186 | struct lttng_payload_view *view, | |
1ce46cfe JG |
1187 | struct lttng_userspace_probe_location **location) |
1188 | { | |
1189 | struct lttng_userspace_probe_location_function_comm *location_function_comm; | |
1190 | const char *function_name_src, *binary_path_src; | |
1191 | char *function_name = NULL, *binary_path = NULL; | |
1192 | int ret = 0; | |
e368fb43 JG |
1193 | size_t expected_size; |
1194 | const int binary_fd = lttng_payload_view_pop_fd(view); | |
1ce46cfe | 1195 | |
1ce46cfe JG |
1196 | assert(location); |
1197 | ||
e368fb43 JG |
1198 | if (binary_fd < 0) { |
1199 | ret = -LTTNG_ERR_INVALID; | |
1200 | goto end; | |
1201 | } | |
1202 | ||
1203 | if (view->buffer.size < sizeof(*location_function_comm)) { | |
1204 | ret = -LTTNG_ERR_INVALID; | |
1205 | goto end; | |
1206 | } | |
1207 | ||
1ce46cfe | 1208 | location_function_comm = |
e368fb43 | 1209 | (typeof(location_function_comm)) view->buffer.data; |
1ce46cfe | 1210 | |
e368fb43 | 1211 | expected_size = sizeof(*location_function_comm) + |
1ce46cfe JG |
1212 | location_function_comm->function_name_len + |
1213 | location_function_comm->binary_path_len; | |
1214 | ||
e368fb43 | 1215 | if (view->buffer.size < expected_size) { |
1ce46cfe JG |
1216 | ret = -LTTNG_ERR_INVALID; |
1217 | goto end; | |
1218 | } | |
1219 | ||
e368fb43 | 1220 | function_name_src = view->buffer.data + sizeof(*location_function_comm); |
1ce46cfe JG |
1221 | binary_path_src = function_name_src + |
1222 | location_function_comm->function_name_len; | |
1223 | ||
1224 | if (function_name_src[location_function_comm->function_name_len - 1] != '\0') { | |
1225 | ret = -LTTNG_ERR_INVALID; | |
1226 | goto end; | |
1227 | } | |
1228 | if (binary_path_src[location_function_comm->binary_path_len - 1] != '\0') { | |
1229 | ret = -LTTNG_ERR_INVALID; | |
1230 | goto end; | |
1231 | } | |
1232 | ||
1233 | function_name = lttng_strndup(function_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1234 | if (!function_name) { | |
1235 | PERROR("lttng_strndup"); | |
2aa28610 | 1236 | ret = -LTTNG_ERR_NOMEM; |
1ce46cfe JG |
1237 | goto end; |
1238 | } | |
1239 | ||
1240 | binary_path = lttng_strndup(binary_path_src, LTTNG_PATH_MAX); | |
1241 | if (!binary_path) { | |
1242 | PERROR("lttng_strndup"); | |
2aa28610 | 1243 | ret = -LTTNG_ERR_NOMEM; |
1ce46cfe JG |
1244 | goto end; |
1245 | } | |
1246 | ||
1247 | *location = lttng_userspace_probe_location_function_create_no_check( | |
1248 | binary_path, function_name, NULL, false); | |
1249 | if (!(*location)) { | |
1250 | ret = -LTTNG_ERR_INVALID; | |
1251 | goto end; | |
1252 | } | |
1253 | ||
e368fb43 JG |
1254 | ret = lttng_userspace_probe_location_function_set_binary_fd( |
1255 | *location, binary_fd); | |
1256 | if (ret) { | |
1257 | const int close_ret = close(binary_fd); | |
1258 | ||
1259 | if (close_ret) { | |
1260 | PERROR("Failed to close userspace probe function binary fd"); | |
1261 | } | |
1262 | ret = -LTTNG_ERR_INVALID; | |
1263 | goto end; | |
1264 | } | |
1265 | ||
1ce46cfe JG |
1266 | ret = (int) expected_size; |
1267 | end: | |
1268 | free(function_name); | |
1269 | free(binary_path); | |
1270 | return ret; | |
1271 | } | |
1272 | ||
f4d0bb2e | 1273 | static |
e368fb43 JG |
1274 | int lttng_userspace_probe_location_tracepoint_create_from_payload( |
1275 | struct lttng_payload_view *view, | |
f4d0bb2e FD |
1276 | struct lttng_userspace_probe_location **location) |
1277 | { | |
1278 | struct lttng_userspace_probe_location_tracepoint_comm *location_tracepoint_comm; | |
1279 | const char *probe_name_src, *provider_name_src, *binary_path_src; | |
1280 | char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL; | |
1281 | int ret = 0; | |
e368fb43 JG |
1282 | size_t expected_size; |
1283 | const int binary_fd = lttng_payload_view_pop_fd(view); | |
f4d0bb2e | 1284 | |
f4d0bb2e FD |
1285 | assert(location); |
1286 | ||
e368fb43 JG |
1287 | if (binary_fd < 0) { |
1288 | ret = -LTTNG_ERR_INVALID; | |
1289 | goto end; | |
1290 | } | |
1291 | ||
1292 | if (view->buffer.size < sizeof(*location_tracepoint_comm)) { | |
1293 | ret = -LTTNG_ERR_INVALID; | |
1294 | goto end; | |
1295 | } | |
1296 | ||
f4d0bb2e | 1297 | location_tracepoint_comm = |
e368fb43 | 1298 | (typeof(location_tracepoint_comm)) view->buffer.data; |
f4d0bb2e | 1299 | |
e368fb43 | 1300 | expected_size = sizeof(*location_tracepoint_comm) + |
f4d0bb2e FD |
1301 | location_tracepoint_comm->probe_name_len + |
1302 | location_tracepoint_comm->provider_name_len + | |
1303 | location_tracepoint_comm->binary_path_len; | |
1304 | ||
e368fb43 | 1305 | if (view->buffer.size < expected_size) { |
f4d0bb2e FD |
1306 | ret = -LTTNG_ERR_INVALID; |
1307 | goto end; | |
1308 | } | |
1309 | ||
e368fb43 | 1310 | probe_name_src = view->buffer.data + sizeof(*location_tracepoint_comm); |
f4d0bb2e FD |
1311 | provider_name_src = probe_name_src + |
1312 | location_tracepoint_comm->probe_name_len; | |
1313 | binary_path_src = provider_name_src + | |
1314 | location_tracepoint_comm->provider_name_len; | |
1315 | ||
1316 | if (probe_name_src[location_tracepoint_comm->probe_name_len - 1] != '\0') { | |
1317 | ret = -LTTNG_ERR_INVALID; | |
1318 | goto end; | |
1319 | } | |
1320 | ||
1321 | if (provider_name_src[location_tracepoint_comm->provider_name_len - 1] != '\0') { | |
1322 | ret = -LTTNG_ERR_INVALID; | |
1323 | goto end; | |
1324 | } | |
1325 | ||
1326 | if (binary_path_src[location_tracepoint_comm->binary_path_len - 1] != '\0') { | |
1327 | ret = -LTTNG_ERR_INVALID; | |
1328 | goto end; | |
1329 | } | |
1330 | ||
1331 | probe_name = lttng_strndup(probe_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1332 | if (!probe_name) { | |
1333 | PERROR("lttng_strndup"); | |
1334 | goto end; | |
1335 | } | |
1336 | provider_name = lttng_strndup(provider_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1337 | if (!provider_name) { | |
1338 | PERROR("lttng_strndup"); | |
1339 | goto end; | |
1340 | } | |
1341 | ||
1342 | binary_path = lttng_strndup(binary_path_src, LTTNG_SYMBOL_NAME_LEN); | |
1343 | if (!binary_path) { | |
1344 | PERROR("lttng_strndup"); | |
1345 | goto end; | |
1346 | } | |
1347 | ||
1348 | *location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
1349 | binary_path, provider_name, probe_name, NULL, false); | |
1350 | if (!(*location)) { | |
1351 | ret = -LTTNG_ERR_INVALID; | |
1352 | goto end; | |
1353 | } | |
1354 | ||
e368fb43 JG |
1355 | ret = lttng_userspace_probe_location_tracepoint_set_binary_fd( |
1356 | *location, binary_fd); | |
1357 | if (ret) { | |
1358 | const int close_ret = close(binary_fd); | |
1359 | ||
1360 | if (close_ret) { | |
1361 | PERROR("Failed to close userspace probe tracepoint binary fd"); | |
1362 | } | |
1363 | ret = -LTTNG_ERR_INVALID; | |
1364 | goto end; | |
1365 | } | |
1366 | ||
f4d0bb2e FD |
1367 | ret = (int) expected_size; |
1368 | end: | |
1369 | free(probe_name); | |
1370 | free(provider_name); | |
1371 | free(binary_path); | |
1372 | return ret; | |
1373 | } | |
1374 | ||
1ce46cfe | 1375 | static |
e368fb43 JG |
1376 | int lttng_userspace_probe_location_lookup_method_create_from_payload( |
1377 | struct lttng_payload_view *view, | |
1ce46cfe JG |
1378 | struct lttng_userspace_probe_location_lookup_method **lookup_method) |
1379 | { | |
1380 | int ret; | |
1381 | struct lttng_userspace_probe_location_lookup_method_comm *lookup_comm; | |
1382 | enum lttng_userspace_probe_location_lookup_method_type type; | |
1383 | ||
e368fb43 | 1384 | assert(view); |
1ce46cfe JG |
1385 | assert(lookup_method); |
1386 | ||
e368fb43 | 1387 | if (view->buffer.size < sizeof(*lookup_comm)) { |
1ce46cfe JG |
1388 | ret = -LTTNG_ERR_INVALID; |
1389 | goto end; | |
1390 | } | |
1391 | ||
e368fb43 | 1392 | lookup_comm = (typeof(lookup_comm)) view->buffer.data; |
1ce46cfe JG |
1393 | type = (enum lttng_userspace_probe_location_lookup_method_type) |
1394 | lookup_comm->type; | |
1395 | switch (type) { | |
1396 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
1397 | *lookup_method = NULL; | |
1398 | break; | |
1399 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
1400 | *lookup_method = | |
1401 | lttng_userspace_probe_location_lookup_method_function_elf_create(); | |
1402 | if (!(*lookup_method)) { | |
1403 | ret = -LTTNG_ERR_INVALID; | |
1404 | goto end; | |
1405 | } | |
1406 | break; | |
f4d0bb2e FD |
1407 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
1408 | *lookup_method = | |
1409 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); | |
1410 | if (!(*lookup_method)) { | |
1411 | ret = -LTTNG_ERR_INVALID; | |
1412 | goto end; | |
1413 | } | |
1414 | break; | |
1ce46cfe JG |
1415 | default: |
1416 | ret = -LTTNG_ERR_INVALID; | |
1417 | goto end; | |
1418 | } | |
1419 | ||
1420 | ret = sizeof(*lookup_comm); | |
1421 | end: | |
1422 | return ret; | |
1423 | } | |
1424 | ||
1425 | LTTNG_HIDDEN | |
e368fb43 JG |
1426 | int lttng_userspace_probe_location_create_from_payload( |
1427 | struct lttng_payload_view *view, | |
1ce46cfe JG |
1428 | struct lttng_userspace_probe_location **location) |
1429 | { | |
1430 | struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
1431 | struct lttng_userspace_probe_location_comm *probe_location_comm; | |
1432 | enum lttng_userspace_probe_location_type type; | |
1ce46cfe JG |
1433 | int consumed = 0; |
1434 | int ret; | |
1435 | ||
e368fb43 | 1436 | assert(view); |
1ce46cfe JG |
1437 | assert(location); |
1438 | ||
1439 | lookup_method = NULL; | |
1440 | ||
e368fb43 | 1441 | if (view->buffer.size <= sizeof(*probe_location_comm)) { |
1ce46cfe JG |
1442 | ret = -LTTNG_ERR_INVALID; |
1443 | goto end; | |
1444 | } | |
1445 | ||
e368fb43 | 1446 | probe_location_comm = (typeof(probe_location_comm)) view->buffer.data; |
1ce46cfe JG |
1447 | type = (enum lttng_userspace_probe_location_type) probe_location_comm->type; |
1448 | consumed += sizeof(*probe_location_comm); | |
1449 | ||
1450 | switch (type) { | |
1451 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1452 | { | |
e368fb43 JG |
1453 | struct lttng_payload_view location_view = |
1454 | lttng_payload_view_from_view( | |
1455 | view, consumed, -1); | |
1ce46cfe | 1456 | |
e368fb43 JG |
1457 | ret = lttng_userspace_probe_location_function_create_from_payload( |
1458 | &location_view, location); | |
1ce46cfe JG |
1459 | if (ret < 0) { |
1460 | goto end; | |
1461 | } | |
1462 | break; | |
1463 | } | |
f4d0bb2e FD |
1464 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1465 | { | |
e368fb43 JG |
1466 | struct lttng_payload_view location_view = |
1467 | lttng_payload_view_from_view(view, consumed, -1); | |
f4d0bb2e | 1468 | |
e368fb43 JG |
1469 | ret = lttng_userspace_probe_location_tracepoint_create_from_payload( |
1470 | &location_view, location); | |
f4d0bb2e FD |
1471 | if (ret < 0) { |
1472 | goto end; | |
1473 | } | |
1474 | break; | |
1475 | } | |
1ce46cfe JG |
1476 | default: |
1477 | ret = -LTTNG_ERR_INVALID; | |
1478 | goto end; | |
1479 | } | |
1480 | ||
1481 | consumed += ret; | |
e368fb43 | 1482 | if (view->buffer.size <= consumed) { |
1ce46cfe JG |
1483 | ret = -LTTNG_ERR_INVALID; |
1484 | goto end; | |
1485 | } | |
1486 | ||
e368fb43 JG |
1487 | { |
1488 | struct lttng_payload_view lookup_method_view = | |
1489 | lttng_payload_view_from_view( | |
1490 | view, consumed, -1); | |
1491 | ||
1492 | ret = lttng_userspace_probe_location_lookup_method_create_from_payload( | |
1493 | &lookup_method_view, &lookup_method); | |
1494 | } | |
1ce46cfe JG |
1495 | if (ret < 0) { |
1496 | ret = -LTTNG_ERR_INVALID; | |
1497 | goto end; | |
1498 | } | |
1499 | ||
1500 | assert(lookup_method); | |
1501 | (*location)->lookup_method = lookup_method; | |
1502 | lookup_method = NULL; | |
1503 | ret += consumed; | |
1504 | end: | |
1505 | return ret; | |
1506 | } | |
1507 | ||
1508 | LTTNG_HIDDEN | |
1509 | int lttng_userspace_probe_location_function_set_binary_fd( | |
1510 | struct lttng_userspace_probe_location *location, int binary_fd) | |
1511 | { | |
1512 | int ret = 0; | |
1513 | struct lttng_userspace_probe_location_function *function_location; | |
1514 | ||
1515 | assert(location); | |
1516 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
1517 | ||
1518 | function_location = container_of(location, | |
1519 | struct lttng_userspace_probe_location_function, parent); | |
1520 | if (function_location->binary_fd >= 0) { | |
1521 | ret = close(function_location->binary_fd); | |
1522 | if (ret) { | |
1523 | PERROR("close"); | |
1524 | ret = -LTTNG_ERR_INVALID; | |
1525 | goto end; | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | function_location->binary_fd = binary_fd; | |
1530 | end: | |
1531 | return ret; | |
1532 | } | |
1533 | ||
f4d0bb2e FD |
1534 | LTTNG_HIDDEN |
1535 | int lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
1536 | struct lttng_userspace_probe_location *location, int binary_fd) | |
1537 | { | |
1538 | int ret = 0; | |
1539 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
1540 | ||
1541 | assert(location); | |
1542 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
1543 | ||
1544 | tracepoint_location = container_of(location, | |
1545 | struct lttng_userspace_probe_location_tracepoint, parent); | |
1546 | if (tracepoint_location->binary_fd >= 0) { | |
1547 | ret = close(tracepoint_location->binary_fd); | |
1548 | if (ret) { | |
1549 | PERROR("close"); | |
1550 | ret = -LTTNG_ERR_INVALID; | |
1551 | goto end; | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | tracepoint_location->binary_fd = binary_fd; | |
1556 | end: | |
1557 | return ret; | |
1558 | } | |
1559 | ||
1ce46cfe JG |
1560 | static |
1561 | int lttng_userspace_probe_location_function_flatten( | |
1562 | const struct lttng_userspace_probe_location *location, | |
1563 | struct lttng_dynamic_buffer *buffer) | |
1564 | { | |
1565 | struct lttng_userspace_probe_location_lookup_method_elf flat_lookup_method; | |
1566 | struct lttng_userspace_probe_location_function *probe_function; | |
1567 | struct lttng_userspace_probe_location_function flat_probe; | |
1568 | size_t function_name_len, binary_path_len; | |
1569 | size_t padding_needed = 0; | |
1570 | char *flat_probe_start; | |
1571 | int storage_needed = 0; | |
1572 | int ret; | |
1573 | ||
1574 | assert(location); | |
1575 | ||
1576 | if (location->lookup_method && location->lookup_method->type != | |
1577 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF) { | |
1578 | ret = -LTTNG_ERR_INVALID; | |
1579 | goto end; | |
1580 | } | |
1581 | ||
1582 | probe_function = container_of(location, | |
1583 | struct lttng_userspace_probe_location_function, | |
1584 | parent); | |
1585 | assert(probe_function->function_name); | |
1586 | assert(probe_function->binary_path); | |
1587 | ||
1588 | storage_needed += | |
1589 | sizeof(struct lttng_userspace_probe_location_function); | |
1590 | function_name_len = strlen(probe_function->function_name) + 1; | |
1591 | binary_path_len = strlen(probe_function->binary_path) + 1; | |
1592 | storage_needed += function_name_len + binary_path_len; | |
1593 | ||
1594 | /* | |
1595 | * The lookup method is aligned to 64-bit within the buffer. | |
1596 | * This is needed even if there is no lookup method since | |
1597 | * the next structure in the buffer probably needs to be | |
1598 | * aligned too (depending on the arch). | |
1599 | */ | |
1600 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1601 | storage_needed += padding_needed; | |
1602 | ||
1603 | if (location->lookup_method) { | |
1604 | /* NOTE: elf look-up method is assumed here. */ | |
1605 | storage_needed += sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1606 | } | |
1607 | ||
1608 | if (!buffer) { | |
1609 | ret = storage_needed; | |
1610 | goto end; | |
1611 | } | |
1612 | ||
1613 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1614 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1615 | buffer->size + storage_needed); | |
1616 | if (ret) { | |
1617 | goto end; | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1622 | ||
1623 | flat_probe_start = buffer->data + buffer->size; | |
1624 | flat_probe.parent.type = location->type; | |
1625 | /* | |
1626 | * The lookup method, if present, is the last element in the flat | |
1627 | * representation of the probe. | |
1628 | */ | |
1629 | if (location->lookup_method) { | |
1630 | flat_probe.parent.lookup_method = | |
1631 | (struct lttng_userspace_probe_location_lookup_method *) | |
1632 | (flat_probe_start + sizeof(flat_probe) + | |
1633 | function_name_len + binary_path_len + padding_needed); | |
1634 | } else { | |
1635 | flat_probe.parent.lookup_method = NULL; | |
1636 | } | |
1637 | ||
1638 | flat_probe.function_name = flat_probe_start + sizeof(flat_probe); | |
1639 | flat_probe.binary_path = flat_probe.function_name + function_name_len; | |
1640 | flat_probe.binary_fd = -1; | |
1641 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, | |
1642 | sizeof(flat_probe)); | |
1643 | if (ret) { | |
1644 | goto end; | |
1645 | } | |
1646 | ||
1647 | ret = lttng_dynamic_buffer_append(buffer, | |
1648 | probe_function->function_name, function_name_len); | |
1649 | if (ret) { | |
1650 | goto end; | |
1651 | } | |
1652 | ret = lttng_dynamic_buffer_append(buffer, | |
1653 | probe_function->binary_path, binary_path_len); | |
1654 | if (ret) { | |
1655 | goto end; | |
1656 | } | |
1657 | ||
1658 | /* Insert padding before the lookup method. */ | |
1659 | ret = lttng_dynamic_buffer_set_size(buffer, | |
1660 | buffer->size + padding_needed); | |
1661 | if (ret) { | |
1662 | goto end; | |
1663 | } | |
1664 | ||
1665 | if (!location->lookup_method) { | |
1666 | /* Not an error, the default method is used. */ | |
1667 | ret = storage_needed; | |
1668 | goto end; | |
1669 | } | |
1670 | ||
1671 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1672 | flat_lookup_method.parent.type = | |
1673 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
1674 | ret = lttng_dynamic_buffer_append(buffer, | |
1675 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1676 | if (ret) { | |
1677 | goto end; | |
1678 | } | |
1679 | ret = storage_needed; | |
1680 | end: | |
1681 | return ret; | |
1682 | } | |
1683 | ||
f4d0bb2e FD |
1684 | static |
1685 | int lttng_userspace_probe_location_tracepoint_flatten( | |
1686 | const struct lttng_userspace_probe_location *location, | |
1687 | struct lttng_dynamic_buffer *buffer) | |
1688 | { | |
1689 | struct lttng_userspace_probe_location_lookup_method_sdt flat_lookup_method; | |
1690 | struct lttng_userspace_probe_location_tracepoint *probe_tracepoint; | |
1691 | struct lttng_userspace_probe_location_tracepoint flat_probe; | |
1692 | size_t probe_name_len, provider_name_len, binary_path_len; | |
1693 | size_t padding_needed = 0; | |
1694 | int storage_needed = 0; | |
1695 | char *flat_probe_start; | |
1696 | int ret = 0; | |
1697 | ||
1698 | assert(location); | |
1699 | ||
1700 | /* Only SDT tracepoints are supported at the moment */ | |
1701 | if (location->lookup_method && location->lookup_method->type != | |
1702 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT) { | |
1703 | ret = -LTTNG_ERR_INVALID; | |
1704 | goto end; | |
1705 | } | |
1706 | probe_tracepoint = container_of(location, | |
1707 | struct lttng_userspace_probe_location_tracepoint, | |
1708 | parent); | |
1709 | assert(probe_tracepoint->probe_name); | |
1710 | assert(probe_tracepoint->provider_name); | |
1711 | assert(probe_tracepoint->binary_path); | |
1712 | ||
1713 | /* Compute the storage space needed to flatten the probe location */ | |
1714 | storage_needed += sizeof(struct lttng_userspace_probe_location_tracepoint); | |
1715 | ||
1716 | probe_name_len = strlen(probe_tracepoint->probe_name) + 1; | |
1717 | provider_name_len = strlen(probe_tracepoint->provider_name) + 1; | |
1718 | binary_path_len = strlen(probe_tracepoint->binary_path) + 1; | |
1719 | ||
1720 | storage_needed += probe_name_len + provider_name_len + binary_path_len; | |
1721 | ||
1722 | /* | |
1723 | * The lookup method is aligned to 64-bit within the buffer. | |
1724 | * This is needed even if there is no lookup method since | |
1725 | * the next structure in the buffer probably needs to be | |
1726 | * aligned too (depending on the arch). | |
1727 | */ | |
1728 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1729 | storage_needed += padding_needed; | |
1730 | ||
1731 | if (location->lookup_method) { | |
1732 | /* NOTE: elf look-up method is assumed here. */ | |
1733 | storage_needed += | |
1734 | sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1735 | } | |
1736 | ||
1737 | /* | |
1738 | * If the caller set buffer to NULL, return the size of the needed buffer. | |
1739 | */ | |
1740 | if (!buffer) { | |
1741 | ret = storage_needed; | |
1742 | goto end; | |
1743 | } | |
1744 | ||
1745 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1746 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1747 | buffer->size + storage_needed); | |
1748 | if (ret) { | |
1749 | goto end; | |
1750 | } | |
1751 | } | |
1752 | ||
1753 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1754 | ||
1755 | flat_probe_start = buffer->data + buffer->size; | |
1756 | flat_probe.parent.type = location->type; | |
1757 | ||
1758 | /* | |
1759 | * The lookup method, if present, is the last element in the flat | |
1760 | * representation of the probe. | |
1761 | */ | |
1762 | if (location->lookup_method) { | |
1763 | flat_probe.parent.lookup_method = | |
1764 | (struct lttng_userspace_probe_location_lookup_method *) | |
1765 | (flat_probe_start + sizeof(flat_probe) + | |
1766 | probe_name_len + provider_name_len + | |
1767 | binary_path_len + padding_needed); | |
1768 | } else { | |
1769 | flat_probe.parent.lookup_method = NULL; | |
1770 | } | |
1771 | ||
1772 | flat_probe.probe_name = flat_probe_start + sizeof(flat_probe); | |
1773 | flat_probe.provider_name = flat_probe.probe_name + probe_name_len; | |
1774 | flat_probe.binary_path = flat_probe.provider_name + provider_name_len; | |
1775 | flat_probe.binary_fd = -1; | |
1776 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, sizeof(flat_probe)); | |
1777 | if (ret) { | |
1778 | goto end; | |
1779 | } | |
1780 | ||
1781 | /* Append all the fields to the buffer */ | |
1782 | ret = lttng_dynamic_buffer_append(buffer, | |
1783 | probe_tracepoint->probe_name, probe_name_len); | |
1784 | if (ret) { | |
1785 | goto end; | |
1786 | } | |
1787 | ret = lttng_dynamic_buffer_append(buffer, | |
1788 | probe_tracepoint->provider_name, provider_name_len); | |
1789 | if (ret) { | |
1790 | goto end; | |
1791 | } | |
1792 | ret = lttng_dynamic_buffer_append(buffer, | |
1793 | probe_tracepoint->binary_path, binary_path_len); | |
1794 | if (ret) { | |
1795 | goto end; | |
1796 | } | |
1797 | ||
1798 | /* Insert padding before the lookup method. */ | |
1799 | ret = lttng_dynamic_buffer_set_size(buffer, buffer->size + padding_needed); | |
1800 | if (ret) { | |
1801 | goto end; | |
1802 | } | |
1803 | ||
1804 | if (!location->lookup_method) { | |
1805 | /* Not an error, the default method is used. */ | |
1806 | ret = storage_needed; | |
1807 | goto end; | |
1808 | } | |
1809 | ||
1810 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1811 | ||
1812 | flat_lookup_method.parent.type = | |
1813 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
1814 | ret = lttng_dynamic_buffer_append(buffer, | |
1815 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1816 | if (ret) { | |
1817 | goto end; | |
1818 | } | |
1819 | ret = storage_needed; | |
1820 | end: | |
1821 | return ret; | |
1822 | } | |
1823 | ||
1ce46cfe JG |
1824 | LTTNG_HIDDEN |
1825 | int lttng_userspace_probe_location_flatten( | |
1826 | const struct lttng_userspace_probe_location *location, | |
1827 | struct lttng_dynamic_buffer *buffer) | |
1828 | { | |
1829 | int ret; | |
1830 | if (!location) { | |
1831 | ret = -LTTNG_ERR_INVALID; | |
1832 | goto end; | |
1833 | } | |
1834 | ||
1835 | /* Only types currently supported. */ | |
1836 | switch (location->type) { | |
1837 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1838 | ret = lttng_userspace_probe_location_function_flatten(location, buffer); | |
1839 | break; | |
f4d0bb2e FD |
1840 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1841 | ret = lttng_userspace_probe_location_tracepoint_flatten(location, buffer); | |
1842 | break; | |
1ce46cfe JG |
1843 | default: |
1844 | ret = -LTTNG_ERR_INVALID; | |
1845 | goto end; | |
1846 | } | |
1847 | ||
1848 | end: | |
1849 | return ret; | |
1850 | } | |
394357fe FD |
1851 | |
1852 | LTTNG_HIDDEN | |
1853 | struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy( | |
1854 | const struct lttng_userspace_probe_location *location) | |
1855 | { | |
1856 | struct lttng_userspace_probe_location *new_location = NULL; | |
1857 | enum lttng_userspace_probe_location_type type; | |
1858 | ||
1859 | if (!location) { | |
1860 | goto err; | |
1861 | } | |
1862 | ||
1863 | type = lttng_userspace_probe_location_get_type(location); | |
1864 | switch (type) { | |
1865 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1866 | new_location = | |
1867 | lttng_userspace_probe_location_function_copy(location); | |
1868 | if (!new_location) { | |
1869 | goto err; | |
1870 | } | |
1871 | break; | |
f4d0bb2e FD |
1872 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1873 | new_location = | |
1874 | lttng_userspace_probe_location_tracepoint_copy(location); | |
1875 | if (!new_location) { | |
1876 | goto err; | |
1877 | } | |
1878 | break; | |
394357fe FD |
1879 | default: |
1880 | new_location = NULL; | |
1881 | goto err; | |
1882 | } | |
1883 | err: | |
1884 | return new_location; | |
1885 | } | |
dfcfa983 JR |
1886 | |
1887 | LTTNG_HIDDEN | |
1888 | bool lttng_userspace_probe_location_lookup_method_is_equal( | |
1889 | const struct lttng_userspace_probe_location_lookup_method *a, | |
1890 | const struct lttng_userspace_probe_location_lookup_method *b) | |
1891 | { | |
1892 | bool is_equal = false; | |
1893 | ||
1894 | if (!a || !b) { | |
1895 | goto end; | |
1896 | } | |
1897 | ||
1898 | if (a == b) { | |
1899 | is_equal = true; | |
1900 | goto end; | |
1901 | } | |
1902 | ||
1903 | if (a->type != b->type) { | |
1904 | goto end; | |
1905 | } | |
1906 | ||
1907 | is_equal = true; | |
1908 | end: | |
1909 | return is_equal; | |
1910 | } | |
1911 | ||
1912 | LTTNG_HIDDEN | |
1913 | bool lttng_userspace_probe_location_is_equal( | |
1914 | const struct lttng_userspace_probe_location *a, | |
1915 | const struct lttng_userspace_probe_location *b) | |
1916 | { | |
1917 | bool is_equal = false; | |
1918 | ||
1919 | if (!a || !b) { | |
1920 | goto end; | |
1921 | } | |
1922 | ||
1923 | if (a == b) { | |
1924 | is_equal = true; | |
1925 | goto end; | |
1926 | } | |
1927 | ||
1928 | if (!lttng_userspace_probe_location_lookup_method_is_equal( | |
1929 | a->lookup_method, b->lookup_method)) { | |
1930 | goto end; | |
1931 | } | |
1932 | ||
1933 | if (a->type != b->type) { | |
1934 | goto end; | |
1935 | } | |
1936 | ||
1937 | is_equal = a->equal ? a->equal(a, b) : true; | |
1938 | end: | |
1939 | return is_equal; | |
1940 | } |