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> | |
9 | #include <common/error.h> | |
10 | #include <common/macros.h> | |
11 | #include <common/compat/string.h> | |
12 | #include <fcntl.h> | |
13 | #include <lttng/constant.h> | |
14 | #include <lttng/userspace-probe-internal.h> | |
15 | ||
16 | enum lttng_userspace_probe_location_lookup_method_type | |
17 | lttng_userspace_probe_location_lookup_method_get_type( | |
18 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
19 | { | |
20 | return lookup_method ? lookup_method->type : | |
21 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_UNKNOWN; | |
22 | } | |
23 | ||
24 | void lttng_userspace_probe_location_lookup_method_destroy( | |
25 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
26 | { | |
27 | if (!lookup_method){ | |
28 | return; | |
29 | } | |
30 | ||
5d21f143 | 31 | free(lookup_method); |
1ce46cfe JG |
32 | } |
33 | ||
34 | struct lttng_userspace_probe_location_lookup_method * | |
35 | lttng_userspace_probe_location_lookup_method_function_elf_create(void) | |
36 | { | |
37 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
38 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
39 | ||
40 | elf_method = zmalloc(sizeof(*elf_method)); | |
41 | if (!elf_method) { | |
42 | PERROR("zmalloc"); | |
43 | goto end; | |
44 | } | |
45 | ||
46 | ret = &elf_method->parent; | |
47 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
48 | end: | |
49 | return ret; | |
50 | } | |
51 | ||
f4d0bb2e FD |
52 | struct lttng_userspace_probe_location_lookup_method * |
53 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(void) | |
54 | { | |
55 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
56 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
57 | ||
58 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
59 | if (!sdt_method) { | |
60 | PERROR("zmalloc"); | |
61 | goto end; | |
62 | } | |
63 | ||
64 | ret = &sdt_method->parent; | |
65 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
66 | end: | |
67 | return ret; | |
68 | } | |
69 | ||
1ce46cfe JG |
70 | enum lttng_userspace_probe_location_type lttng_userspace_probe_location_get_type( |
71 | const struct lttng_userspace_probe_location *location) | |
72 | { | |
73 | return location ? location->type : | |
74 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN; | |
75 | } | |
76 | ||
77 | static | |
78 | void lttng_userspace_probe_location_function_destroy( | |
79 | struct lttng_userspace_probe_location *location) | |
80 | { | |
81 | struct lttng_userspace_probe_location_function *location_function = NULL; | |
82 | ||
83 | assert(location); | |
84 | ||
85 | location_function = container_of(location, | |
86 | struct lttng_userspace_probe_location_function, parent); | |
87 | ||
88 | assert(location_function); | |
89 | ||
90 | free(location_function->function_name); | |
91 | free(location_function->binary_path); | |
92 | if (location_function->binary_fd >= 0) { | |
93 | if (close(location_function->binary_fd)) { | |
94 | PERROR("close"); | |
95 | } | |
96 | } | |
97 | free(location); | |
98 | } | |
99 | ||
f4d0bb2e FD |
100 | static |
101 | void lttng_userspace_probe_location_tracepoint_destroy( | |
102 | struct lttng_userspace_probe_location *location) | |
103 | { | |
104 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint = NULL; | |
105 | ||
106 | assert(location); | |
107 | ||
108 | location_tracepoint = container_of(location, | |
109 | struct lttng_userspace_probe_location_tracepoint, | |
110 | parent); | |
111 | ||
112 | assert(location_tracepoint); | |
113 | ||
114 | free(location_tracepoint->probe_name); | |
115 | free(location_tracepoint->provider_name); | |
116 | free(location_tracepoint->binary_path); | |
117 | if (location_tracepoint->binary_fd >= 0) { | |
118 | if (close(location_tracepoint->binary_fd)) { | |
119 | PERROR("close"); | |
120 | } | |
121 | } | |
122 | free(location); | |
123 | } | |
124 | ||
1ce46cfe JG |
125 | void lttng_userspace_probe_location_destroy( |
126 | struct lttng_userspace_probe_location *location) | |
127 | { | |
128 | if (!location) { | |
129 | return; | |
130 | } | |
131 | ||
132 | lttng_userspace_probe_location_lookup_method_destroy( | |
133 | location->lookup_method); | |
134 | ||
135 | switch (location->type) { | |
136 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
137 | lttng_userspace_probe_location_function_destroy(location); | |
138 | break; | |
f4d0bb2e FD |
139 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
140 | lttng_userspace_probe_location_tracepoint_destroy(location); | |
141 | break; | |
1ce46cfe | 142 | default: |
adf53c67 | 143 | abort(); |
1ce46cfe JG |
144 | } |
145 | } | |
146 | ||
d3a684ee JR |
147 | static |
148 | bool lttng_userspace_probe_location_function_is_equal(const struct lttng_userspace_probe_location *_a, | |
149 | const struct lttng_userspace_probe_location *_b) | |
150 | { | |
151 | bool is_equal = false; | |
152 | struct lttng_userspace_probe_location_function *a, *b; | |
153 | ||
154 | a = container_of(_a, struct lttng_userspace_probe_location_function, parent); | |
155 | b = container_of(_b, struct lttng_userspace_probe_location_function, parent); | |
156 | ||
157 | /* The binary_fd is not checked since it does not hold "immutable" | |
158 | * information. | |
159 | */ | |
160 | ||
161 | if (a->instrumentation_type != b->instrumentation_type) { | |
162 | goto end; | |
163 | } | |
164 | ||
165 | assert(a->function_name); | |
166 | assert(b->function_name); | |
167 | if (strcmp(a->function_name, b->function_name)) { | |
168 | goto end; | |
169 | } | |
170 | ||
171 | assert(a->binary_path); | |
172 | assert(b->binary_path); | |
173 | if (strcmp(a->binary_path, b->binary_path)) { | |
174 | goto end; | |
175 | } | |
176 | ||
177 | is_equal = true; | |
178 | end: | |
179 | return is_equal; | |
180 | } | |
181 | ||
1ce46cfe JG |
182 | static struct lttng_userspace_probe_location * |
183 | lttng_userspace_probe_location_function_create_no_check(const char *binary_path, | |
184 | const char *function_name, | |
185 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
186 | bool open_binary) | |
187 | { | |
188 | int binary_fd = -1; | |
189 | char *function_name_copy = NULL, *binary_path_copy = NULL; | |
190 | struct lttng_userspace_probe_location *ret = NULL; | |
191 | struct lttng_userspace_probe_location_function *location; | |
192 | ||
193 | if (open_binary) { | |
194 | binary_fd = open(binary_path, O_RDONLY); | |
195 | if (binary_fd < 0) { | |
196 | PERROR("Error opening the binary"); | |
197 | goto error; | |
198 | } | |
199 | } else { | |
200 | binary_fd = -1; | |
201 | } | |
202 | ||
203 | function_name_copy = lttng_strndup(function_name, LTTNG_SYMBOL_NAME_LEN); | |
204 | if (!function_name_copy) { | |
205 | PERROR("Error duplicating the function name"); | |
206 | goto error; | |
207 | } | |
208 | ||
209 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
210 | if (!binary_path_copy) { | |
211 | PERROR("Error duplicating the function name"); | |
212 | goto error; | |
213 | } | |
214 | ||
215 | location = zmalloc(sizeof(*location)); | |
216 | if (!location) { | |
217 | PERROR("Error allocating userspace probe location"); | |
218 | goto error; | |
219 | } | |
220 | ||
221 | location->function_name = function_name_copy; | |
222 | location->binary_path = binary_path_copy; | |
223 | location->binary_fd = binary_fd; | |
9d3981b5 JG |
224 | location->instrumentation_type = |
225 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY; | |
1ce46cfe JG |
226 | |
227 | ret = &location->parent; | |
228 | ret->lookup_method = lookup_method; | |
229 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION; | |
d3a684ee | 230 | ret->equal = lttng_userspace_probe_location_function_is_equal; |
1ce46cfe JG |
231 | goto end; |
232 | ||
233 | error: | |
234 | free(function_name_copy); | |
235 | free(binary_path_copy); | |
236 | if (binary_fd >= 0) { | |
237 | if (close(binary_fd)) { | |
238 | PERROR("Error closing binary fd in error path"); | |
239 | } | |
240 | } | |
241 | end: | |
242 | return ret; | |
243 | } | |
244 | ||
d3a684ee JR |
245 | static |
246 | bool lttng_userspace_probe_location_tracepoint_is_equal(const struct lttng_userspace_probe_location *_a, | |
247 | const struct lttng_userspace_probe_location *_b) | |
248 | { | |
249 | bool is_equal = false; | |
250 | struct lttng_userspace_probe_location_tracepoint *a, *b; | |
251 | ||
252 | a = container_of(_a, struct lttng_userspace_probe_location_tracepoint, parent); | |
253 | b = container_of(_b, struct lttng_userspace_probe_location_tracepoint, parent); | |
254 | ||
255 | /* The binary_fd is not checked since it does not hold "immutable" | |
256 | * information. | |
257 | */ | |
258 | ||
259 | assert(a->probe_name); | |
260 | assert(b->probe_name); | |
261 | if (strcmp(a->probe_name, b->probe_name)) { | |
262 | goto end; | |
263 | } | |
264 | ||
265 | assert(a->provider_name); | |
266 | assert(b->provider_name); | |
267 | if (strcmp(a->provider_name, b->provider_name)) { | |
268 | goto end; | |
269 | } | |
270 | ||
271 | assert(a->binary_path); | |
272 | assert(b->binary_path); | |
273 | if (strcmp(a->binary_path, b->binary_path)) { | |
274 | goto end; | |
275 | } | |
276 | ||
277 | is_equal = true; | |
278 | end: | |
279 | return is_equal; | |
280 | } | |
281 | ||
f4d0bb2e FD |
282 | static struct lttng_userspace_probe_location * |
283 | lttng_userspace_probe_location_tracepoint_create_no_check(const char *binary_path, | |
284 | const char *provider_name, const char *probe_name, | |
285 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
286 | bool open_binary) | |
287 | { | |
288 | int binary_fd = -1; | |
289 | char *probe_name_copy = NULL; | |
290 | char *provider_name_copy = NULL; | |
291 | char *binary_path_copy = NULL; | |
292 | struct lttng_userspace_probe_location *ret = NULL; | |
293 | struct lttng_userspace_probe_location_tracepoint *location; | |
294 | ||
295 | if (open_binary) { | |
296 | binary_fd = open(binary_path, O_RDONLY); | |
297 | if (binary_fd < 0) { | |
298 | PERROR("open"); | |
299 | goto error; | |
300 | } | |
301 | } else { | |
302 | binary_fd = -1; | |
303 | } | |
304 | ||
305 | probe_name_copy = lttng_strndup(probe_name, LTTNG_SYMBOL_NAME_LEN); | |
306 | if (!probe_name_copy) { | |
307 | PERROR("lttng_strndup"); | |
308 | goto error; | |
309 | } | |
310 | ||
311 | provider_name_copy = lttng_strndup(provider_name, LTTNG_SYMBOL_NAME_LEN); | |
312 | if (!provider_name_copy) { | |
313 | PERROR("lttng_strndup"); | |
314 | goto error; | |
315 | } | |
316 | ||
317 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
318 | if (!binary_path_copy) { | |
319 | PERROR("lttng_strndup"); | |
320 | goto error; | |
321 | } | |
322 | ||
323 | location = zmalloc(sizeof(*location)); | |
324 | if (!location) { | |
325 | PERROR("zmalloc"); | |
326 | goto error; | |
327 | } | |
328 | ||
329 | location->probe_name = probe_name_copy; | |
330 | location->provider_name = provider_name_copy; | |
331 | location->binary_path = binary_path_copy; | |
332 | location->binary_fd = binary_fd; | |
333 | ||
334 | ret = &location->parent; | |
335 | ret->lookup_method = lookup_method; | |
336 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT; | |
d3a684ee | 337 | ret->equal = lttng_userspace_probe_location_tracepoint_is_equal; |
f4d0bb2e FD |
338 | goto end; |
339 | ||
340 | error: | |
341 | free(probe_name_copy); | |
342 | free(provider_name_copy); | |
7c86453b | 343 | free(binary_path_copy); |
f4d0bb2e FD |
344 | if (binary_fd >= 0) { |
345 | if (close(binary_fd)) { | |
346 | PERROR("Error closing binary fd in error path"); | |
347 | } | |
348 | } | |
349 | end: | |
350 | return ret; | |
351 | } | |
352 | ||
1ce46cfe JG |
353 | struct lttng_userspace_probe_location * |
354 | lttng_userspace_probe_location_function_create(const char *binary_path, | |
355 | const char *function_name, | |
356 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
357 | { | |
358 | struct lttng_userspace_probe_location *ret = NULL; | |
359 | ||
360 | if (!binary_path || !function_name) { | |
361 | ERR("Invalid argument(s)"); | |
362 | goto end; | |
363 | } | |
364 | ||
365 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
366 | lookup_method)) { | |
367 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
368 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
369 | break; | |
370 | default: | |
371 | /* Invalid probe location lookup method. */ | |
372 | goto end; | |
373 | } | |
374 | ||
375 | ret = lttng_userspace_probe_location_function_create_no_check( | |
376 | binary_path, function_name, lookup_method, true); | |
377 | end: | |
378 | return ret; | |
379 | } | |
380 | ||
f4d0bb2e FD |
381 | struct lttng_userspace_probe_location * |
382 | lttng_userspace_probe_location_tracepoint_create(const char *binary_path, | |
383 | const char *provider_name, const char *probe_name, | |
384 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
385 | { | |
386 | struct lttng_userspace_probe_location *ret = NULL; | |
387 | ||
388 | if (!binary_path || !probe_name || !provider_name) { | |
389 | ERR("Invalid argument(s)"); | |
390 | goto end; | |
391 | } | |
392 | ||
393 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
394 | lookup_method)) { | |
395 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
396 | break; | |
397 | default: | |
398 | /* Invalid probe location lookup method. */ | |
399 | goto end; | |
400 | } | |
401 | ||
402 | ret = lttng_userspace_probe_location_tracepoint_create_no_check( | |
403 | binary_path, provider_name, probe_name, lookup_method, true); | |
404 | end: | |
405 | return ret; | |
406 | } | |
407 | ||
394357fe FD |
408 | static struct lttng_userspace_probe_location_lookup_method * |
409 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
410 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
411 | { | |
412 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
413 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
414 | ||
415 | assert(lookup_method); | |
416 | assert(lookup_method->type == | |
417 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF); | |
418 | ||
419 | elf_method = zmalloc(sizeof(*elf_method)); | |
420 | if (!elf_method) { | |
421 | PERROR("Error allocating ELF userspace probe lookup method"); | |
422 | goto error; | |
423 | } | |
424 | ||
425 | elf_method->parent.type = lookup_method->type; | |
426 | parent = &elf_method->parent; | |
427 | ||
428 | goto end; | |
429 | error: | |
430 | parent = NULL; | |
431 | end: | |
432 | return parent; | |
433 | } | |
434 | ||
f4d0bb2e FD |
435 | static struct lttng_userspace_probe_location_lookup_method * |
436 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
437 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
438 | { | |
439 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
440 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
441 | ||
442 | assert(lookup_method); | |
443 | assert(lookup_method->type == | |
444 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT); | |
445 | ||
446 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
447 | if (!sdt_method) { | |
448 | PERROR("zmalloc"); | |
449 | goto error; | |
450 | } | |
451 | ||
452 | sdt_method->parent.type = lookup_method->type; | |
453 | parent = &sdt_method->parent; | |
454 | ||
455 | goto end; | |
456 | ||
457 | error: | |
458 | parent = NULL; | |
459 | end: | |
460 | return parent; | |
461 | } | |
462 | ||
394357fe FD |
463 | static struct lttng_userspace_probe_location * |
464 | lttng_userspace_probe_location_function_copy( | |
465 | const struct lttng_userspace_probe_location *location) | |
466 | { | |
467 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
468 | struct lttng_userspace_probe_location *new_location = NULL; | |
469 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
470 | const char *binary_path = NULL; |
471 | const char *function_name = NULL; | |
d7ee7196 | 472 | int fd, new_fd; |
394357fe FD |
473 | |
474 | assert(location); | |
475 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
476 | ||
cc831309 FD |
477 | /* Get probe location fields */ |
478 | binary_path = lttng_userspace_probe_location_function_get_binary_path(location); | |
394357fe | 479 | if (!binary_path) { |
cc831309 | 480 | ERR("Userspace probe binary path is NULL"); |
394357fe FD |
481 | goto error; |
482 | } | |
483 | ||
cc831309 | 484 | function_name = lttng_userspace_probe_location_function_get_function_name(location); |
394357fe | 485 | if (!function_name) { |
cc831309 | 486 | ERR("Userspace probe function name is NULL"); |
394357fe FD |
487 | goto error; |
488 | } | |
489 | ||
490 | /* Duplicate the binary fd */ | |
d7ee7196 | 491 | fd = lttng_userspace_probe_location_function_get_binary_fd(location); |
394357fe | 492 | if (fd == -1) { |
d7ee7196 FD |
493 | ERR("Error getting file descriptor to binary"); |
494 | goto error; | |
495 | } | |
496 | ||
497 | new_fd = dup(fd); | |
498 | if (new_fd == -1) { | |
394357fe FD |
499 | PERROR("Error duplicating file descriptor to binary"); |
500 | goto error; | |
501 | } | |
502 | ||
503 | /* | |
504 | * Duplicate probe location method fields | |
505 | */ | |
506 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
507 | location->lookup_method); | |
508 | switch (lookup_type) { | |
509 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
510 | lookup_method = | |
511 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
512 | location->lookup_method); | |
513 | if (!lookup_method) { | |
514 | goto close_fd; | |
515 | } | |
516 | break; | |
517 | default: | |
518 | /* Invalid probe location lookup method. */ | |
519 | goto close_fd; | |
520 | } | |
521 | ||
522 | /* Create the probe_location */ | |
523 | new_location = lttng_userspace_probe_location_function_create_no_check( | |
cc831309 | 524 | binary_path, function_name, lookup_method, false); |
394357fe FD |
525 | if (!new_location) { |
526 | goto destroy_lookup_method; | |
527 | } | |
528 | ||
529 | /* Set the duplicated fd to the new probe_location */ | |
d7ee7196 | 530 | if (lttng_userspace_probe_location_function_set_binary_fd(new_location, new_fd) < 0) { |
394357fe FD |
531 | goto destroy_probe_location; |
532 | } | |
533 | ||
534 | goto end; | |
535 | ||
536 | destroy_probe_location: | |
537 | lttng_userspace_probe_location_destroy(new_location); | |
538 | destroy_lookup_method: | |
539 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
540 | close_fd: | |
d7ee7196 | 541 | if (close(new_fd) < 0) { |
394357fe FD |
542 | PERROR("Error closing duplicated file descriptor in error path"); |
543 | } | |
544 | error: | |
394357fe FD |
545 | new_location = NULL; |
546 | end: | |
547 | return new_location; | |
548 | } | |
549 | ||
f4d0bb2e FD |
550 | static struct lttng_userspace_probe_location * |
551 | lttng_userspace_probe_location_tracepoint_copy( | |
552 | const struct lttng_userspace_probe_location *location) | |
553 | { | |
554 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
555 | struct lttng_userspace_probe_location *new_location = NULL; | |
556 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
557 | const char *binary_path = NULL; |
558 | const char *probe_name = NULL; | |
559 | const char *provider_name = NULL; | |
d7ee7196 | 560 | int fd, new_fd; |
f4d0bb2e FD |
561 | |
562 | assert(location); | |
563 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
564 | ||
cc831309 FD |
565 | /* Get probe location fields */ |
566 | binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location); | |
f4d0bb2e | 567 | if (!binary_path) { |
cc831309 | 568 | ERR("Userspace probe binary path is NULL"); |
f4d0bb2e FD |
569 | goto error; |
570 | } | |
571 | ||
cc831309 | 572 | probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location); |
f4d0bb2e | 573 | if (!probe_name) { |
cc831309 | 574 | ERR("Userspace probe probe name is NULL"); |
f4d0bb2e FD |
575 | goto error; |
576 | } | |
577 | ||
cc831309 | 578 | provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location); |
f4d0bb2e | 579 | if (!provider_name) { |
cc831309 | 580 | ERR("Userspace probe provider name is NULL"); |
f4d0bb2e FD |
581 | goto error; |
582 | } | |
583 | ||
584 | /* Duplicate the binary fd */ | |
d7ee7196 | 585 | fd = lttng_userspace_probe_location_tracepoint_get_binary_fd(location); |
f4d0bb2e | 586 | if (fd == -1) { |
d7ee7196 FD |
587 | ERR("Error getting file descriptor to binary"); |
588 | goto error; | |
589 | } | |
590 | ||
591 | new_fd = dup(fd); | |
592 | if (new_fd == -1) { | |
cc831309 | 593 | PERROR("Error duplicating file descriptor to binary"); |
f4d0bb2e FD |
594 | goto error; |
595 | } | |
596 | ||
597 | /* | |
598 | * Duplicate probe location method fields | |
599 | */ | |
600 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
601 | location->lookup_method); | |
602 | switch (lookup_type) { | |
603 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
604 | lookup_method = | |
605 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
606 | location->lookup_method); | |
607 | if (!lookup_method) { | |
608 | goto close_fd; | |
609 | } | |
610 | break; | |
611 | default: | |
612 | /* Invalid probe location lookup method. */ | |
613 | goto close_fd; | |
614 | } | |
615 | ||
616 | /* Create the probe_location */ | |
617 | new_location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
cc831309 | 618 | binary_path, provider_name, probe_name, lookup_method, false); |
f4d0bb2e FD |
619 | if (!new_location) { |
620 | goto destroy_lookup_method; | |
621 | } | |
622 | ||
623 | /* Set the duplicated fd to the new probe_location */ | |
d7ee7196 | 624 | if (lttng_userspace_probe_location_tracepoint_set_binary_fd(new_location, new_fd) < 0) { |
f4d0bb2e FD |
625 | goto destroy_probe_location; |
626 | } | |
627 | ||
628 | goto end; | |
629 | ||
630 | destroy_probe_location: | |
631 | lttng_userspace_probe_location_destroy(new_location); | |
632 | destroy_lookup_method: | |
633 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
634 | close_fd: | |
d7ee7196 | 635 | if (close(new_fd) < 0) { |
cc831309 | 636 | PERROR("Error closing duplicated file descriptor in error path"); |
f4d0bb2e FD |
637 | } |
638 | error: | |
f4d0bb2e FD |
639 | new_location = NULL; |
640 | end: | |
641 | return new_location; | |
642 | } | |
643 | ||
1ce46cfe JG |
644 | const char *lttng_userspace_probe_location_function_get_binary_path( |
645 | const struct lttng_userspace_probe_location *location) | |
646 | { | |
647 | const char *ret = NULL; | |
648 | struct lttng_userspace_probe_location_function *function_location; | |
649 | ||
650 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
651 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
652 | ERR("Invalid argument(s)"); | |
653 | goto end; | |
654 | } | |
655 | ||
656 | function_location = container_of(location, | |
657 | struct lttng_userspace_probe_location_function, | |
658 | parent); | |
659 | ret = function_location->binary_path; | |
660 | end: | |
661 | return ret; | |
662 | } | |
663 | ||
f4d0bb2e FD |
664 | const char *lttng_userspace_probe_location_tracepoint_get_binary_path( |
665 | const struct lttng_userspace_probe_location *location) | |
666 | { | |
667 | const char *ret = NULL; | |
668 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
669 | ||
670 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
671 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
672 | ERR("Invalid argument(s)"); | |
673 | goto end; | |
674 | } | |
675 | ||
676 | tracepoint_location = container_of(location, | |
677 | struct lttng_userspace_probe_location_tracepoint, | |
678 | parent); | |
679 | ret = tracepoint_location->binary_path; | |
680 | end: | |
681 | return ret; | |
682 | } | |
683 | ||
1ce46cfe JG |
684 | const char *lttng_userspace_probe_location_function_get_function_name( |
685 | const struct lttng_userspace_probe_location *location) | |
686 | { | |
687 | const char *ret = NULL; | |
688 | struct lttng_userspace_probe_location_function *function_location; | |
689 | ||
690 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
691 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
692 | ERR("Invalid argument(s)"); | |
693 | goto end; | |
694 | } | |
695 | ||
696 | function_location = container_of(location, | |
697 | struct lttng_userspace_probe_location_function, parent); | |
698 | ret = function_location->function_name; | |
699 | end: | |
700 | return ret; | |
701 | } | |
702 | ||
f4d0bb2e FD |
703 | const char *lttng_userspace_probe_location_tracepoint_get_probe_name( |
704 | const struct lttng_userspace_probe_location *location) | |
705 | { | |
706 | const char *ret = NULL; | |
707 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
708 | ||
709 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
710 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
711 | ERR("Invalid argument(s)"); | |
712 | goto end; | |
713 | } | |
714 | ||
715 | tracepoint_location = container_of(location, | |
716 | struct lttng_userspace_probe_location_tracepoint, parent); | |
717 | ret = tracepoint_location->probe_name; | |
718 | end: | |
719 | return ret; | |
720 | } | |
721 | ||
722 | const char *lttng_userspace_probe_location_tracepoint_get_provider_name( | |
723 | const struct lttng_userspace_probe_location *location) | |
724 | { | |
725 | const char *ret = NULL; | |
726 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
727 | ||
728 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
729 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
730 | ERR("Invalid argument(s)"); | |
731 | goto end; | |
732 | } | |
733 | ||
734 | tracepoint_location = container_of(location, | |
735 | struct lttng_userspace_probe_location_tracepoint, parent); | |
736 | ret = tracepoint_location->provider_name; | |
737 | end: | |
738 | return ret; | |
739 | } | |
740 | ||
1ce46cfe JG |
741 | int lttng_userspace_probe_location_function_get_binary_fd( |
742 | const struct lttng_userspace_probe_location *location) | |
743 | { | |
744 | int ret = -1; | |
745 | struct lttng_userspace_probe_location_function *function_location; | |
746 | ||
747 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
748 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
749 | ERR("Invalid argument(s)"); | |
750 | goto end; | |
751 | } | |
752 | ||
753 | function_location = container_of(location, | |
754 | struct lttng_userspace_probe_location_function, parent); | |
755 | ret = function_location->binary_fd; | |
756 | end: | |
757 | return ret; | |
758 | } | |
759 | ||
9d3981b5 JG |
760 | enum lttng_userspace_probe_location_function_instrumentation_type |
761 | lttng_userspace_probe_location_function_get_instrumentation_type( | |
762 | const struct lttng_userspace_probe_location *location) | |
763 | { | |
764 | enum lttng_userspace_probe_location_function_instrumentation_type type; | |
765 | struct lttng_userspace_probe_location_function *function_location; | |
766 | ||
767 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
768 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
769 | ERR("Invalid argument(s)"); | |
770 | type = LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_UNKNOWN; | |
771 | goto end; | |
772 | } | |
773 | ||
774 | function_location = container_of(location, | |
775 | struct lttng_userspace_probe_location_function, parent); | |
776 | type = function_location->instrumentation_type; | |
777 | end: | |
778 | return type; | |
779 | } | |
780 | ||
781 | enum lttng_userspace_probe_location_status | |
782 | lttng_userspace_probe_location_function_set_instrumentation_type( | |
783 | const struct lttng_userspace_probe_location *location, | |
784 | enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type) | |
785 | { | |
786 | enum lttng_userspace_probe_location_status status = | |
787 | LTTNG_USERSPACE_PROBE_LOCATION_STATUS_OK; | |
788 | struct lttng_userspace_probe_location_function *function_location; | |
789 | ||
790 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
791 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION || | |
792 | instrumentation_type != | |
793 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY) { | |
794 | ERR("Invalid argument(s)"); | |
795 | status = LTTNG_USERSPACE_PROBE_LOCATION_STATUS_INVALID; | |
796 | goto end; | |
797 | } | |
798 | ||
799 | function_location = container_of(location, | |
800 | struct lttng_userspace_probe_location_function, parent); | |
801 | function_location->instrumentation_type = instrumentation_type; | |
802 | end: | |
803 | return status; | |
804 | } | |
805 | ||
f4d0bb2e FD |
806 | int lttng_userspace_probe_location_tracepoint_get_binary_fd( |
807 | const struct lttng_userspace_probe_location *location) | |
808 | { | |
809 | int ret = -1; | |
810 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
811 | ||
812 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
813 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
814 | ERR("Invalid argument(s)"); | |
815 | goto end; | |
816 | } | |
817 | ||
818 | tracepoint_location = container_of(location, | |
819 | struct lttng_userspace_probe_location_tracepoint, parent); | |
820 | ret = tracepoint_location->binary_fd; | |
821 | end: | |
822 | return ret; | |
823 | } | |
824 | ||
1ce46cfe JG |
825 | static struct lttng_userspace_probe_location_lookup_method * |
826 | lttng_userspace_probe_location_function_get_lookup_method( | |
827 | const struct lttng_userspace_probe_location *location) | |
828 | { | |
829 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
830 | ||
831 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
832 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
833 | ERR("Invalid argument(s)"); | |
834 | goto end; | |
835 | } | |
836 | ||
837 | ret = location->lookup_method; | |
838 | end: | |
839 | return ret; | |
840 | } | |
841 | ||
f4d0bb2e FD |
842 | static struct lttng_userspace_probe_location_lookup_method * |
843 | lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
844 | const struct lttng_userspace_probe_location *location) | |
845 | { | |
846 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
847 | ||
848 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
849 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
850 | ERR("Invalid argument(s)"); | |
851 | goto end; | |
852 | } | |
853 | ||
854 | ret = location->lookup_method; | |
855 | end: | |
856 | return ret; | |
857 | } | |
858 | ||
87597c2c | 859 | const struct lttng_userspace_probe_location_lookup_method * |
1ce46cfe JG |
860 | lttng_userspace_probe_location_get_lookup_method( |
861 | const struct lttng_userspace_probe_location *location) | |
862 | { | |
863 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
864 | ||
865 | assert(location); | |
866 | switch (location->type) { | |
867 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
868 | ret = lttng_userspace_probe_location_function_get_lookup_method( | |
869 | location); | |
870 | break; | |
f4d0bb2e FD |
871 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
872 | ret = lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
873 | location); | |
874 | break; | |
1ce46cfe JG |
875 | default: |
876 | ERR("Unknowned lookup method."); | |
877 | break; | |
878 | } | |
879 | return ret; | |
880 | } | |
881 | ||
882 | static | |
883 | int lttng_userspace_probe_location_lookup_method_serialize( | |
884 | struct lttng_userspace_probe_location_lookup_method *method, | |
885 | struct lttng_dynamic_buffer *buffer) | |
886 | { | |
887 | int ret; | |
888 | struct lttng_userspace_probe_location_lookup_method_comm | |
889 | lookup_method_comm; | |
890 | ||
891 | lookup_method_comm.type = (int8_t) (method ? method->type : | |
892 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT); | |
893 | if (buffer) { | |
894 | ret = lttng_dynamic_buffer_append(buffer, &lookup_method_comm, | |
895 | sizeof(lookup_method_comm)); | |
896 | if (ret) { | |
897 | goto end; | |
898 | } | |
899 | } | |
f4d0bb2e FD |
900 | ret = sizeof(lookup_method_comm); |
901 | end: | |
902 | return ret; | |
903 | } | |
904 | ||
905 | static | |
906 | int lttng_userspace_probe_location_function_serialize( | |
907 | const struct lttng_userspace_probe_location *location, | |
908 | struct lttng_dynamic_buffer *buffer, | |
909 | int *binary_fd) | |
910 | { | |
911 | int ret; | |
912 | size_t function_name_len, binary_path_len; | |
913 | struct lttng_userspace_probe_location_function *location_function; | |
914 | struct lttng_userspace_probe_location_function_comm location_function_comm; | |
915 | ||
916 | assert(location); | |
917 | assert(lttng_userspace_probe_location_get_type(location) == | |
918 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
919 | ||
920 | location_function = container_of(location, | |
921 | struct lttng_userspace_probe_location_function, | |
922 | parent); | |
923 | if (!location_function->function_name || !location_function->binary_path) { | |
924 | ret = -LTTNG_ERR_INVALID; | |
925 | goto end; | |
926 | } | |
927 | ||
928 | if (binary_fd && location_function->binary_fd < 0) { | |
929 | ret = -LTTNG_ERR_INVALID; | |
930 | goto end; | |
931 | } | |
932 | ||
933 | if (binary_fd) { | |
934 | *binary_fd = location_function->binary_fd; | |
935 | } | |
936 | ||
937 | function_name_len = strlen(location_function->function_name); | |
938 | if (function_name_len == 0) { | |
939 | ret = -LTTNG_ERR_INVALID; | |
940 | goto end; | |
941 | } | |
942 | binary_path_len = strlen(location_function->binary_path); | |
943 | if (binary_path_len == 0) { | |
944 | ret = -LTTNG_ERR_INVALID; | |
945 | goto end; | |
946 | } | |
947 | ||
948 | location_function_comm.function_name_len = function_name_len + 1; | |
949 | location_function_comm.binary_path_len = binary_path_len + 1; | |
950 | ||
951 | if (buffer) { | |
952 | ret = lttng_dynamic_buffer_append(buffer, | |
953 | &location_function_comm, | |
954 | sizeof(location_function_comm)); | |
955 | if (ret) { | |
956 | ret = -LTTNG_ERR_INVALID; | |
957 | goto end; | |
958 | } | |
959 | ret = lttng_dynamic_buffer_append(buffer, | |
960 | location_function->function_name, | |
961 | location_function_comm.function_name_len); | |
962 | if (ret) { | |
963 | ret = -LTTNG_ERR_INVALID; | |
964 | goto end; | |
965 | } | |
966 | ret = lttng_dynamic_buffer_append(buffer, | |
967 | location_function->binary_path, | |
968 | location_function_comm.binary_path_len); | |
969 | if (ret) { | |
970 | ret = -LTTNG_ERR_INVALID; | |
971 | goto end; | |
972 | } | |
973 | } | |
974 | ret = sizeof(location_function_comm) + | |
975 | location_function_comm.function_name_len + | |
976 | location_function_comm.binary_path_len; | |
1ce46cfe JG |
977 | end: |
978 | return ret; | |
979 | } | |
980 | ||
981 | static | |
f4d0bb2e | 982 | int lttng_userspace_probe_location_tracepoint_serialize( |
1ce46cfe JG |
983 | const struct lttng_userspace_probe_location *location, |
984 | struct lttng_dynamic_buffer *buffer, | |
985 | int *binary_fd) | |
986 | { | |
987 | int ret; | |
f4d0bb2e FD |
988 | size_t probe_name_len, provider_name_len, binary_path_len; |
989 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint; | |
990 | struct lttng_userspace_probe_location_tracepoint_comm location_tracepoint_comm; | |
1ce46cfe JG |
991 | |
992 | assert(location); | |
993 | assert(lttng_userspace_probe_location_get_type(location) == | |
f4d0bb2e | 994 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
1ce46cfe | 995 | |
f4d0bb2e FD |
996 | location_tracepoint = container_of(location, |
997 | struct lttng_userspace_probe_location_tracepoint, | |
1ce46cfe | 998 | parent); |
f4d0bb2e FD |
999 | if (!location_tracepoint->probe_name || |
1000 | !location_tracepoint->provider_name || | |
1001 | !location_tracepoint->binary_path) { | |
1ce46cfe JG |
1002 | ret = -LTTNG_ERR_INVALID; |
1003 | goto end; | |
1004 | } | |
1005 | ||
f4d0bb2e | 1006 | if (binary_fd && location_tracepoint->binary_fd < 0) { |
1ce46cfe JG |
1007 | ret = -LTTNG_ERR_INVALID; |
1008 | goto end; | |
1009 | } | |
1010 | ||
1011 | if (binary_fd) { | |
f4d0bb2e | 1012 | *binary_fd = location_tracepoint->binary_fd; |
1ce46cfe JG |
1013 | } |
1014 | ||
f4d0bb2e FD |
1015 | probe_name_len = strlen(location_tracepoint->probe_name); |
1016 | if (probe_name_len == 0) { | |
1ce46cfe JG |
1017 | ret = -LTTNG_ERR_INVALID; |
1018 | goto end; | |
1019 | } | |
f4d0bb2e FD |
1020 | |
1021 | provider_name_len = strlen(location_tracepoint->provider_name); | |
1022 | if (provider_name_len == 0) { | |
1023 | ret = -LTTNG_ERR_INVALID; | |
1024 | goto end; | |
1025 | } | |
1026 | ||
1027 | binary_path_len = strlen(location_tracepoint->binary_path); | |
1ce46cfe JG |
1028 | if (binary_path_len == 0) { |
1029 | ret = -LTTNG_ERR_INVALID; | |
1030 | goto end; | |
1031 | } | |
1032 | ||
f4d0bb2e FD |
1033 | location_tracepoint_comm.probe_name_len = probe_name_len + 1; |
1034 | location_tracepoint_comm.provider_name_len = provider_name_len + 1; | |
1035 | location_tracepoint_comm.binary_path_len = binary_path_len + 1; | |
1ce46cfe JG |
1036 | |
1037 | if (buffer) { | |
1038 | ret = lttng_dynamic_buffer_append(buffer, | |
f4d0bb2e FD |
1039 | &location_tracepoint_comm, |
1040 | sizeof(location_tracepoint_comm)); | |
1ce46cfe JG |
1041 | if (ret) { |
1042 | ret = -LTTNG_ERR_INVALID; | |
1043 | goto end; | |
1044 | } | |
1045 | ret = lttng_dynamic_buffer_append(buffer, | |
f4d0bb2e FD |
1046 | location_tracepoint->probe_name, |
1047 | location_tracepoint_comm.probe_name_len); | |
1ce46cfe JG |
1048 | if (ret) { |
1049 | ret = -LTTNG_ERR_INVALID; | |
1050 | goto end; | |
1051 | } | |
1052 | ret = lttng_dynamic_buffer_append(buffer, | |
f4d0bb2e FD |
1053 | location_tracepoint->provider_name, |
1054 | location_tracepoint_comm.provider_name_len); | |
1055 | if (ret) { | |
1056 | ret = -LTTNG_ERR_INVALID; | |
1057 | goto end; | |
1058 | } | |
1059 | ret = lttng_dynamic_buffer_append(buffer, | |
1060 | location_tracepoint->binary_path, | |
1061 | location_tracepoint_comm.binary_path_len); | |
1ce46cfe JG |
1062 | if (ret) { |
1063 | ret = -LTTNG_ERR_INVALID; | |
1064 | goto end; | |
1065 | } | |
1066 | } | |
f4d0bb2e FD |
1067 | ret = sizeof(location_tracepoint_comm) + |
1068 | location_tracepoint_comm.probe_name_len + | |
1069 | location_tracepoint_comm.provider_name_len + | |
1070 | location_tracepoint_comm.binary_path_len; | |
1ce46cfe JG |
1071 | end: |
1072 | return ret; | |
1073 | } | |
1074 | ||
1075 | LTTNG_HIDDEN | |
1076 | int lttng_userspace_probe_location_serialize( | |
1077 | const struct lttng_userspace_probe_location *location, | |
1078 | struct lttng_dynamic_buffer *buffer, | |
1079 | int *binary_fd) | |
1080 | { | |
1081 | int ret, buffer_use = 0; | |
1082 | struct lttng_userspace_probe_location_comm location_generic_comm; | |
1083 | ||
1084 | if (!location) { | |
1085 | ERR("Invalid argument(s)"); | |
1086 | ret = -LTTNG_ERR_INVALID; | |
1087 | goto end; | |
1088 | } | |
1089 | ||
56f0bc67 JG |
1090 | memset(&location_generic_comm, 0, sizeof(location_generic_comm)); |
1091 | ||
1ce46cfe JG |
1092 | location_generic_comm.type = (int8_t) location->type; |
1093 | if (buffer) { | |
1094 | ret = lttng_dynamic_buffer_append(buffer, &location_generic_comm, | |
1095 | sizeof(location_generic_comm)); | |
1096 | if (ret) { | |
1097 | goto end; | |
1098 | } | |
1099 | } | |
1100 | buffer_use += sizeof(location_generic_comm); | |
1101 | ||
1102 | switch (lttng_userspace_probe_location_get_type(location)) { | |
1103 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1104 | ret = lttng_userspace_probe_location_function_serialize( | |
1105 | location, buffer, binary_fd); | |
1106 | break; | |
f4d0bb2e FD |
1107 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1108 | ret = lttng_userspace_probe_location_tracepoint_serialize( | |
1109 | location, buffer, binary_fd); | |
1110 | break; | |
1ce46cfe JG |
1111 | default: |
1112 | ERR("Unsupported probe location type"); | |
1113 | ret = -LTTNG_ERR_INVALID; | |
1114 | goto end; | |
1115 | } | |
1116 | if (ret < 0) { | |
1117 | goto end; | |
1118 | } | |
1119 | buffer_use += ret; | |
1120 | ||
1121 | ret = lttng_userspace_probe_location_lookup_method_serialize( | |
1122 | location->lookup_method, buffer); | |
1123 | if (ret < 0) { | |
1124 | goto end; | |
1125 | } | |
1126 | ret += buffer_use; | |
1127 | end: | |
1128 | return ret; | |
1129 | } | |
1130 | ||
1131 | static | |
1132 | int lttng_userspace_probe_location_function_create_from_buffer( | |
1133 | const struct lttng_buffer_view *buffer, | |
1134 | struct lttng_userspace_probe_location **location) | |
1135 | { | |
1136 | struct lttng_userspace_probe_location_function_comm *location_function_comm; | |
1137 | const char *function_name_src, *binary_path_src; | |
1138 | char *function_name = NULL, *binary_path = NULL; | |
1139 | int ret = 0; | |
1140 | ||
1141 | assert(buffer); | |
1142 | assert(buffer->data); | |
1143 | assert(location); | |
1144 | ||
1145 | location_function_comm = | |
1146 | (struct lttng_userspace_probe_location_function_comm *) buffer->data; | |
1147 | ||
1148 | const size_t expected_size = sizeof(*location_function_comm) + | |
1149 | location_function_comm->function_name_len + | |
1150 | location_function_comm->binary_path_len; | |
1151 | ||
1152 | if (buffer->size < expected_size) { | |
1153 | ret = -LTTNG_ERR_INVALID; | |
1154 | goto end; | |
1155 | } | |
1156 | ||
1157 | function_name_src = buffer->data + sizeof(*location_function_comm); | |
1158 | binary_path_src = function_name_src + | |
1159 | location_function_comm->function_name_len; | |
1160 | ||
1161 | if (function_name_src[location_function_comm->function_name_len - 1] != '\0') { | |
1162 | ret = -LTTNG_ERR_INVALID; | |
1163 | goto end; | |
1164 | } | |
1165 | if (binary_path_src[location_function_comm->binary_path_len - 1] != '\0') { | |
1166 | ret = -LTTNG_ERR_INVALID; | |
1167 | goto end; | |
1168 | } | |
1169 | ||
1170 | function_name = lttng_strndup(function_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1171 | if (!function_name) { | |
1172 | PERROR("lttng_strndup"); | |
1173 | goto end; | |
1174 | } | |
1175 | ||
1176 | binary_path = lttng_strndup(binary_path_src, LTTNG_PATH_MAX); | |
1177 | if (!binary_path) { | |
1178 | PERROR("lttng_strndup"); | |
1179 | goto end; | |
1180 | } | |
1181 | ||
1182 | *location = lttng_userspace_probe_location_function_create_no_check( | |
1183 | binary_path, function_name, NULL, false); | |
1184 | if (!(*location)) { | |
1185 | ret = -LTTNG_ERR_INVALID; | |
1186 | goto end; | |
1187 | } | |
1188 | ||
1189 | ret = (int) expected_size; | |
1190 | end: | |
1191 | free(function_name); | |
1192 | free(binary_path); | |
1193 | return ret; | |
1194 | } | |
1195 | ||
f4d0bb2e FD |
1196 | static |
1197 | int lttng_userspace_probe_location_tracepoint_create_from_buffer( | |
1198 | const struct lttng_buffer_view *buffer, | |
1199 | struct lttng_userspace_probe_location **location) | |
1200 | { | |
1201 | struct lttng_userspace_probe_location_tracepoint_comm *location_tracepoint_comm; | |
1202 | const char *probe_name_src, *provider_name_src, *binary_path_src; | |
1203 | char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL; | |
1204 | int ret = 0; | |
1205 | ||
1206 | assert(buffer); | |
1207 | assert(buffer->data); | |
1208 | assert(location); | |
1209 | ||
1210 | location_tracepoint_comm = | |
1211 | (struct lttng_userspace_probe_location_tracepoint_comm *) buffer->data; | |
1212 | ||
1213 | const size_t expected_size = sizeof(*location_tracepoint_comm) + | |
1214 | location_tracepoint_comm->probe_name_len + | |
1215 | location_tracepoint_comm->provider_name_len + | |
1216 | location_tracepoint_comm->binary_path_len; | |
1217 | ||
1218 | if (buffer->size < expected_size) { | |
1219 | ret = -LTTNG_ERR_INVALID; | |
1220 | goto end; | |
1221 | } | |
1222 | ||
1223 | probe_name_src = buffer->data + sizeof(*location_tracepoint_comm); | |
1224 | provider_name_src = probe_name_src + | |
1225 | location_tracepoint_comm->probe_name_len; | |
1226 | binary_path_src = provider_name_src + | |
1227 | location_tracepoint_comm->provider_name_len; | |
1228 | ||
1229 | if (probe_name_src[location_tracepoint_comm->probe_name_len - 1] != '\0') { | |
1230 | ret = -LTTNG_ERR_INVALID; | |
1231 | goto end; | |
1232 | } | |
1233 | ||
1234 | if (provider_name_src[location_tracepoint_comm->provider_name_len - 1] != '\0') { | |
1235 | ret = -LTTNG_ERR_INVALID; | |
1236 | goto end; | |
1237 | } | |
1238 | ||
1239 | if (binary_path_src[location_tracepoint_comm->binary_path_len - 1] != '\0') { | |
1240 | ret = -LTTNG_ERR_INVALID; | |
1241 | goto end; | |
1242 | } | |
1243 | ||
1244 | probe_name = lttng_strndup(probe_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1245 | if (!probe_name) { | |
1246 | PERROR("lttng_strndup"); | |
1247 | goto end; | |
1248 | } | |
1249 | provider_name = lttng_strndup(provider_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1250 | if (!provider_name) { | |
1251 | PERROR("lttng_strndup"); | |
1252 | goto end; | |
1253 | } | |
1254 | ||
1255 | binary_path = lttng_strndup(binary_path_src, LTTNG_SYMBOL_NAME_LEN); | |
1256 | if (!binary_path) { | |
1257 | PERROR("lttng_strndup"); | |
1258 | goto end; | |
1259 | } | |
1260 | ||
1261 | *location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
1262 | binary_path, provider_name, probe_name, NULL, false); | |
1263 | if (!(*location)) { | |
1264 | ret = -LTTNG_ERR_INVALID; | |
1265 | goto end; | |
1266 | } | |
1267 | ||
1268 | ret = (int) expected_size; | |
1269 | end: | |
1270 | free(probe_name); | |
1271 | free(provider_name); | |
1272 | free(binary_path); | |
1273 | return ret; | |
1274 | } | |
1275 | ||
1ce46cfe JG |
1276 | static |
1277 | int lttng_userspace_probe_location_lookup_method_create_from_buffer( | |
1278 | struct lttng_buffer_view *buffer, | |
1279 | struct lttng_userspace_probe_location_lookup_method **lookup_method) | |
1280 | { | |
1281 | int ret; | |
1282 | struct lttng_userspace_probe_location_lookup_method_comm *lookup_comm; | |
1283 | enum lttng_userspace_probe_location_lookup_method_type type; | |
1284 | ||
1285 | assert(buffer); | |
1286 | assert(buffer->data); | |
1287 | assert(lookup_method); | |
1288 | ||
1289 | if (buffer->size < sizeof(*lookup_comm)) { | |
1290 | ret = -LTTNG_ERR_INVALID; | |
1291 | goto end; | |
1292 | } | |
1293 | ||
1294 | lookup_comm = (struct lttng_userspace_probe_location_lookup_method_comm *) | |
1295 | buffer->data; | |
1296 | type = (enum lttng_userspace_probe_location_lookup_method_type) | |
1297 | lookup_comm->type; | |
1298 | switch (type) { | |
1299 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
1300 | *lookup_method = NULL; | |
1301 | break; | |
1302 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
1303 | *lookup_method = | |
1304 | lttng_userspace_probe_location_lookup_method_function_elf_create(); | |
1305 | if (!(*lookup_method)) { | |
1306 | ret = -LTTNG_ERR_INVALID; | |
1307 | goto end; | |
1308 | } | |
1309 | break; | |
f4d0bb2e FD |
1310 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
1311 | *lookup_method = | |
1312 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); | |
1313 | if (!(*lookup_method)) { | |
1314 | ret = -LTTNG_ERR_INVALID; | |
1315 | goto end; | |
1316 | } | |
1317 | break; | |
1ce46cfe JG |
1318 | default: |
1319 | ret = -LTTNG_ERR_INVALID; | |
1320 | goto end; | |
1321 | } | |
1322 | ||
1323 | ret = sizeof(*lookup_comm); | |
1324 | end: | |
1325 | return ret; | |
1326 | } | |
1327 | ||
1328 | LTTNG_HIDDEN | |
1329 | int lttng_userspace_probe_location_create_from_buffer( | |
1330 | const struct lttng_buffer_view *buffer, | |
1331 | struct lttng_userspace_probe_location **location) | |
1332 | { | |
1333 | struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
1334 | struct lttng_userspace_probe_location_comm *probe_location_comm; | |
1335 | enum lttng_userspace_probe_location_type type; | |
1336 | struct lttng_buffer_view lookup_method_view; | |
1337 | int consumed = 0; | |
1338 | int ret; | |
1339 | ||
1340 | ||
1341 | assert(buffer); | |
1342 | assert(buffer->data); | |
1343 | assert(location); | |
1344 | ||
1345 | lookup_method = NULL; | |
1346 | ||
1347 | if (buffer->size <= sizeof(*probe_location_comm)) { | |
1348 | ret = -LTTNG_ERR_INVALID; | |
1349 | goto end; | |
1350 | } | |
1351 | ||
1352 | probe_location_comm = | |
1353 | (struct lttng_userspace_probe_location_comm *) buffer->data; | |
1354 | type = (enum lttng_userspace_probe_location_type) probe_location_comm->type; | |
1355 | consumed += sizeof(*probe_location_comm); | |
1356 | ||
1357 | switch (type) { | |
1358 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1359 | { | |
1360 | struct lttng_buffer_view view = lttng_buffer_view_from_view( | |
1361 | buffer, consumed, buffer->size - consumed); | |
1362 | ||
1363 | ret = lttng_userspace_probe_location_function_create_from_buffer( | |
1364 | &view, location); | |
1365 | if (ret < 0) { | |
1366 | goto end; | |
1367 | } | |
1368 | break; | |
1369 | } | |
f4d0bb2e FD |
1370 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1371 | { | |
1372 | struct lttng_buffer_view view = lttng_buffer_view_from_view( | |
1373 | buffer, consumed, buffer->size - consumed); | |
1374 | ||
1375 | ret = lttng_userspace_probe_location_tracepoint_create_from_buffer( | |
1376 | &view, location); | |
1377 | if (ret < 0) { | |
1378 | goto end; | |
1379 | } | |
1380 | break; | |
1381 | } | |
1ce46cfe JG |
1382 | default: |
1383 | ret = -LTTNG_ERR_INVALID; | |
1384 | goto end; | |
1385 | } | |
1386 | ||
1387 | consumed += ret; | |
1388 | if (buffer->size <= consumed) { | |
1389 | ret = -LTTNG_ERR_INVALID; | |
1390 | goto end; | |
1391 | } | |
1392 | ||
1393 | lookup_method_view = lttng_buffer_view_from_view(buffer, consumed, | |
1394 | buffer->size - consumed); | |
1395 | ret = lttng_userspace_probe_location_lookup_method_create_from_buffer( | |
1396 | &lookup_method_view, &lookup_method); | |
1397 | if (ret < 0) { | |
1398 | ret = -LTTNG_ERR_INVALID; | |
1399 | goto end; | |
1400 | } | |
1401 | ||
1402 | assert(lookup_method); | |
1403 | (*location)->lookup_method = lookup_method; | |
1404 | lookup_method = NULL; | |
1405 | ret += consumed; | |
1406 | end: | |
1407 | return ret; | |
1408 | } | |
1409 | ||
1410 | LTTNG_HIDDEN | |
1411 | int lttng_userspace_probe_location_function_set_binary_fd( | |
1412 | struct lttng_userspace_probe_location *location, int binary_fd) | |
1413 | { | |
1414 | int ret = 0; | |
1415 | struct lttng_userspace_probe_location_function *function_location; | |
1416 | ||
1417 | assert(location); | |
1418 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
1419 | ||
1420 | function_location = container_of(location, | |
1421 | struct lttng_userspace_probe_location_function, parent); | |
1422 | if (function_location->binary_fd >= 0) { | |
1423 | ret = close(function_location->binary_fd); | |
1424 | if (ret) { | |
1425 | PERROR("close"); | |
1426 | ret = -LTTNG_ERR_INVALID; | |
1427 | goto end; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | function_location->binary_fd = binary_fd; | |
1432 | end: | |
1433 | return ret; | |
1434 | } | |
1435 | ||
f4d0bb2e FD |
1436 | LTTNG_HIDDEN |
1437 | int lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
1438 | struct lttng_userspace_probe_location *location, int binary_fd) | |
1439 | { | |
1440 | int ret = 0; | |
1441 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
1442 | ||
1443 | assert(location); | |
1444 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
1445 | ||
1446 | tracepoint_location = container_of(location, | |
1447 | struct lttng_userspace_probe_location_tracepoint, parent); | |
1448 | if (tracepoint_location->binary_fd >= 0) { | |
1449 | ret = close(tracepoint_location->binary_fd); | |
1450 | if (ret) { | |
1451 | PERROR("close"); | |
1452 | ret = -LTTNG_ERR_INVALID; | |
1453 | goto end; | |
1454 | } | |
1455 | } | |
1456 | ||
1457 | tracepoint_location->binary_fd = binary_fd; | |
1458 | end: | |
1459 | return ret; | |
1460 | } | |
1461 | ||
1ce46cfe JG |
1462 | static |
1463 | int lttng_userspace_probe_location_function_flatten( | |
1464 | const struct lttng_userspace_probe_location *location, | |
1465 | struct lttng_dynamic_buffer *buffer) | |
1466 | { | |
1467 | struct lttng_userspace_probe_location_lookup_method_elf flat_lookup_method; | |
1468 | struct lttng_userspace_probe_location_function *probe_function; | |
1469 | struct lttng_userspace_probe_location_function flat_probe; | |
1470 | size_t function_name_len, binary_path_len; | |
1471 | size_t padding_needed = 0; | |
1472 | char *flat_probe_start; | |
1473 | int storage_needed = 0; | |
1474 | int ret; | |
1475 | ||
1476 | assert(location); | |
1477 | ||
1478 | if (location->lookup_method && location->lookup_method->type != | |
1479 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF) { | |
1480 | ret = -LTTNG_ERR_INVALID; | |
1481 | goto end; | |
1482 | } | |
1483 | ||
1484 | probe_function = container_of(location, | |
1485 | struct lttng_userspace_probe_location_function, | |
1486 | parent); | |
1487 | assert(probe_function->function_name); | |
1488 | assert(probe_function->binary_path); | |
1489 | ||
1490 | storage_needed += | |
1491 | sizeof(struct lttng_userspace_probe_location_function); | |
1492 | function_name_len = strlen(probe_function->function_name) + 1; | |
1493 | binary_path_len = strlen(probe_function->binary_path) + 1; | |
1494 | storage_needed += function_name_len + binary_path_len; | |
1495 | ||
1496 | /* | |
1497 | * The lookup method is aligned to 64-bit within the buffer. | |
1498 | * This is needed even if there is no lookup method since | |
1499 | * the next structure in the buffer probably needs to be | |
1500 | * aligned too (depending on the arch). | |
1501 | */ | |
1502 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1503 | storage_needed += padding_needed; | |
1504 | ||
1505 | if (location->lookup_method) { | |
1506 | /* NOTE: elf look-up method is assumed here. */ | |
1507 | storage_needed += sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1508 | } | |
1509 | ||
1510 | if (!buffer) { | |
1511 | ret = storage_needed; | |
1512 | goto end; | |
1513 | } | |
1514 | ||
1515 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1516 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1517 | buffer->size + storage_needed); | |
1518 | if (ret) { | |
1519 | goto end; | |
1520 | } | |
1521 | } | |
1522 | ||
1523 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1524 | ||
1525 | flat_probe_start = buffer->data + buffer->size; | |
1526 | flat_probe.parent.type = location->type; | |
1527 | /* | |
1528 | * The lookup method, if present, is the last element in the flat | |
1529 | * representation of the probe. | |
1530 | */ | |
1531 | if (location->lookup_method) { | |
1532 | flat_probe.parent.lookup_method = | |
1533 | (struct lttng_userspace_probe_location_lookup_method *) | |
1534 | (flat_probe_start + sizeof(flat_probe) + | |
1535 | function_name_len + binary_path_len + padding_needed); | |
1536 | } else { | |
1537 | flat_probe.parent.lookup_method = NULL; | |
1538 | } | |
1539 | ||
1540 | flat_probe.function_name = flat_probe_start + sizeof(flat_probe); | |
1541 | flat_probe.binary_path = flat_probe.function_name + function_name_len; | |
1542 | flat_probe.binary_fd = -1; | |
1543 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, | |
1544 | sizeof(flat_probe)); | |
1545 | if (ret) { | |
1546 | goto end; | |
1547 | } | |
1548 | ||
1549 | ret = lttng_dynamic_buffer_append(buffer, | |
1550 | probe_function->function_name, function_name_len); | |
1551 | if (ret) { | |
1552 | goto end; | |
1553 | } | |
1554 | ret = lttng_dynamic_buffer_append(buffer, | |
1555 | probe_function->binary_path, binary_path_len); | |
1556 | if (ret) { | |
1557 | goto end; | |
1558 | } | |
1559 | ||
1560 | /* Insert padding before the lookup method. */ | |
1561 | ret = lttng_dynamic_buffer_set_size(buffer, | |
1562 | buffer->size + padding_needed); | |
1563 | if (ret) { | |
1564 | goto end; | |
1565 | } | |
1566 | ||
1567 | if (!location->lookup_method) { | |
1568 | /* Not an error, the default method is used. */ | |
1569 | ret = storage_needed; | |
1570 | goto end; | |
1571 | } | |
1572 | ||
1573 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1574 | flat_lookup_method.parent.type = | |
1575 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
1576 | ret = lttng_dynamic_buffer_append(buffer, | |
1577 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1578 | if (ret) { | |
1579 | goto end; | |
1580 | } | |
1581 | ret = storage_needed; | |
1582 | end: | |
1583 | return ret; | |
1584 | } | |
1585 | ||
f4d0bb2e FD |
1586 | static |
1587 | int lttng_userspace_probe_location_tracepoint_flatten( | |
1588 | const struct lttng_userspace_probe_location *location, | |
1589 | struct lttng_dynamic_buffer *buffer) | |
1590 | { | |
1591 | struct lttng_userspace_probe_location_lookup_method_sdt flat_lookup_method; | |
1592 | struct lttng_userspace_probe_location_tracepoint *probe_tracepoint; | |
1593 | struct lttng_userspace_probe_location_tracepoint flat_probe; | |
1594 | size_t probe_name_len, provider_name_len, binary_path_len; | |
1595 | size_t padding_needed = 0; | |
1596 | int storage_needed = 0; | |
1597 | char *flat_probe_start; | |
1598 | int ret = 0; | |
1599 | ||
1600 | assert(location); | |
1601 | ||
1602 | /* Only SDT tracepoints are supported at the moment */ | |
1603 | if (location->lookup_method && location->lookup_method->type != | |
1604 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT) { | |
1605 | ret = -LTTNG_ERR_INVALID; | |
1606 | goto end; | |
1607 | } | |
1608 | probe_tracepoint = container_of(location, | |
1609 | struct lttng_userspace_probe_location_tracepoint, | |
1610 | parent); | |
1611 | assert(probe_tracepoint->probe_name); | |
1612 | assert(probe_tracepoint->provider_name); | |
1613 | assert(probe_tracepoint->binary_path); | |
1614 | ||
1615 | /* Compute the storage space needed to flatten the probe location */ | |
1616 | storage_needed += sizeof(struct lttng_userspace_probe_location_tracepoint); | |
1617 | ||
1618 | probe_name_len = strlen(probe_tracepoint->probe_name) + 1; | |
1619 | provider_name_len = strlen(probe_tracepoint->provider_name) + 1; | |
1620 | binary_path_len = strlen(probe_tracepoint->binary_path) + 1; | |
1621 | ||
1622 | storage_needed += probe_name_len + provider_name_len + binary_path_len; | |
1623 | ||
1624 | /* | |
1625 | * The lookup method is aligned to 64-bit within the buffer. | |
1626 | * This is needed even if there is no lookup method since | |
1627 | * the next structure in the buffer probably needs to be | |
1628 | * aligned too (depending on the arch). | |
1629 | */ | |
1630 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1631 | storage_needed += padding_needed; | |
1632 | ||
1633 | if (location->lookup_method) { | |
1634 | /* NOTE: elf look-up method is assumed here. */ | |
1635 | storage_needed += | |
1636 | sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1637 | } | |
1638 | ||
1639 | /* | |
1640 | * If the caller set buffer to NULL, return the size of the needed buffer. | |
1641 | */ | |
1642 | if (!buffer) { | |
1643 | ret = storage_needed; | |
1644 | goto end; | |
1645 | } | |
1646 | ||
1647 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1648 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1649 | buffer->size + storage_needed); | |
1650 | if (ret) { | |
1651 | goto end; | |
1652 | } | |
1653 | } | |
1654 | ||
1655 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1656 | ||
1657 | flat_probe_start = buffer->data + buffer->size; | |
1658 | flat_probe.parent.type = location->type; | |
1659 | ||
1660 | /* | |
1661 | * The lookup method, if present, is the last element in the flat | |
1662 | * representation of the probe. | |
1663 | */ | |
1664 | if (location->lookup_method) { | |
1665 | flat_probe.parent.lookup_method = | |
1666 | (struct lttng_userspace_probe_location_lookup_method *) | |
1667 | (flat_probe_start + sizeof(flat_probe) + | |
1668 | probe_name_len + provider_name_len + | |
1669 | binary_path_len + padding_needed); | |
1670 | } else { | |
1671 | flat_probe.parent.lookup_method = NULL; | |
1672 | } | |
1673 | ||
1674 | flat_probe.probe_name = flat_probe_start + sizeof(flat_probe); | |
1675 | flat_probe.provider_name = flat_probe.probe_name + probe_name_len; | |
1676 | flat_probe.binary_path = flat_probe.provider_name + provider_name_len; | |
1677 | flat_probe.binary_fd = -1; | |
1678 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, sizeof(flat_probe)); | |
1679 | if (ret) { | |
1680 | goto end; | |
1681 | } | |
1682 | ||
1683 | /* Append all the fields to the buffer */ | |
1684 | ret = lttng_dynamic_buffer_append(buffer, | |
1685 | probe_tracepoint->probe_name, probe_name_len); | |
1686 | if (ret) { | |
1687 | goto end; | |
1688 | } | |
1689 | ret = lttng_dynamic_buffer_append(buffer, | |
1690 | probe_tracepoint->provider_name, provider_name_len); | |
1691 | if (ret) { | |
1692 | goto end; | |
1693 | } | |
1694 | ret = lttng_dynamic_buffer_append(buffer, | |
1695 | probe_tracepoint->binary_path, binary_path_len); | |
1696 | if (ret) { | |
1697 | goto end; | |
1698 | } | |
1699 | ||
1700 | /* Insert padding before the lookup method. */ | |
1701 | ret = lttng_dynamic_buffer_set_size(buffer, buffer->size + padding_needed); | |
1702 | if (ret) { | |
1703 | goto end; | |
1704 | } | |
1705 | ||
1706 | if (!location->lookup_method) { | |
1707 | /* Not an error, the default method is used. */ | |
1708 | ret = storage_needed; | |
1709 | goto end; | |
1710 | } | |
1711 | ||
1712 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1713 | ||
1714 | flat_lookup_method.parent.type = | |
1715 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
1716 | ret = lttng_dynamic_buffer_append(buffer, | |
1717 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1718 | if (ret) { | |
1719 | goto end; | |
1720 | } | |
1721 | ret = storage_needed; | |
1722 | end: | |
1723 | return ret; | |
1724 | } | |
1725 | ||
1ce46cfe JG |
1726 | LTTNG_HIDDEN |
1727 | int lttng_userspace_probe_location_flatten( | |
1728 | const struct lttng_userspace_probe_location *location, | |
1729 | struct lttng_dynamic_buffer *buffer) | |
1730 | { | |
1731 | int ret; | |
1732 | if (!location) { | |
1733 | ret = -LTTNG_ERR_INVALID; | |
1734 | goto end; | |
1735 | } | |
1736 | ||
1737 | /* Only types currently supported. */ | |
1738 | switch (location->type) { | |
1739 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1740 | ret = lttng_userspace_probe_location_function_flatten(location, buffer); | |
1741 | break; | |
f4d0bb2e FD |
1742 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1743 | ret = lttng_userspace_probe_location_tracepoint_flatten(location, buffer); | |
1744 | break; | |
1ce46cfe JG |
1745 | default: |
1746 | ret = -LTTNG_ERR_INVALID; | |
1747 | goto end; | |
1748 | } | |
1749 | ||
1750 | end: | |
1751 | return ret; | |
1752 | } | |
394357fe FD |
1753 | |
1754 | LTTNG_HIDDEN | |
1755 | struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy( | |
1756 | const struct lttng_userspace_probe_location *location) | |
1757 | { | |
1758 | struct lttng_userspace_probe_location *new_location = NULL; | |
1759 | enum lttng_userspace_probe_location_type type; | |
1760 | ||
1761 | if (!location) { | |
1762 | goto err; | |
1763 | } | |
1764 | ||
1765 | type = lttng_userspace_probe_location_get_type(location); | |
1766 | switch (type) { | |
1767 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1768 | new_location = | |
1769 | lttng_userspace_probe_location_function_copy(location); | |
1770 | if (!new_location) { | |
1771 | goto err; | |
1772 | } | |
1773 | break; | |
f4d0bb2e FD |
1774 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1775 | new_location = | |
1776 | lttng_userspace_probe_location_tracepoint_copy(location); | |
1777 | if (!new_location) { | |
1778 | goto err; | |
1779 | } | |
1780 | break; | |
394357fe FD |
1781 | default: |
1782 | new_location = NULL; | |
1783 | goto err; | |
1784 | } | |
1785 | err: | |
1786 | return new_location; | |
1787 | } | |
d3a684ee JR |
1788 | |
1789 | LTTNG_HIDDEN | |
1790 | bool lttng_userspace_probe_location_is_equal( | |
1791 | const struct lttng_userspace_probe_location *a, | |
1792 | const struct lttng_userspace_probe_location *b) | |
1793 | { | |
1794 | bool is_equal = false; | |
1795 | ||
1796 | if (!a || !b) { | |
1797 | goto end; | |
1798 | } | |
1799 | ||
1800 | if (a->type != b->type) { | |
1801 | goto end; | |
1802 | } | |
1803 | ||
1804 | if (a == b) { | |
1805 | is_equal = true; | |
1806 | goto end; | |
1807 | } | |
1808 | ||
1809 | is_equal = a->equal ? a->equal(a, b) : true; | |
1810 | end: | |
1811 | return is_equal; | |
1812 | } | |
1813 | ||
1814 | LTTNG_HIDDEN | |
1815 | int lttng_userspace_probe_location_set_binary_fd( | |
1816 | struct lttng_userspace_probe_location *location, int fd) | |
1817 | { | |
1818 | int ret = 0; | |
1819 | const struct lttng_userspace_probe_location_lookup_method *lookup = NULL; | |
1820 | /* | |
1821 | * Set the file descriptor received from the client through the unix | |
1822 | * socket in the probe location. | |
1823 | */ | |
1824 | lookup = lttng_userspace_probe_location_get_lookup_method(location); | |
1825 | if (!lookup) { | |
1826 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
1827 | goto end; | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | * From the kernel tracer's perspective, all userspace probe event types | |
1832 | * are all the same: a file and an offset. | |
1833 | */ | |
1834 | switch (lttng_userspace_probe_location_lookup_method_get_type(lookup)) { | |
1835 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
1836 | ret = lttng_userspace_probe_location_function_set_binary_fd( | |
1837 | location, fd); | |
1838 | break; | |
1839 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
1840 | ret = lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
1841 | location, fd); | |
1842 | break; | |
1843 | default: | |
1844 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
1845 | goto end; | |
1846 | } | |
1847 | ||
1848 | if (ret) { | |
1849 | ret = LTTNG_ERR_PROBE_LOCATION_INVAL; | |
1850 | goto end; | |
1851 | } | |
1852 | end: | |
1853 | return ret; | |
1854 | } |