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 | 21 | |
fe489250 JG |
22 | static |
23 | int lttng_userspace_probe_location_function_set_binary_fd( | |
24 | struct lttng_userspace_probe_location *location, | |
25 | struct fd_handle *binary_fd); | |
26 | ||
27 | static | |
28 | int lttng_userspace_probe_location_tracepoint_set_binary_fd( | |
29 | struct lttng_userspace_probe_location *location, | |
30 | struct fd_handle *binary_fd); | |
31 | ||
1ce46cfe JG |
32 | enum lttng_userspace_probe_location_lookup_method_type |
33 | lttng_userspace_probe_location_lookup_method_get_type( | |
34 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
35 | { | |
36 | return lookup_method ? lookup_method->type : | |
37 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_UNKNOWN; | |
38 | } | |
39 | ||
40 | void lttng_userspace_probe_location_lookup_method_destroy( | |
41 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
42 | { | |
43 | if (!lookup_method){ | |
44 | return; | |
45 | } | |
46 | ||
5d21f143 | 47 | free(lookup_method); |
1ce46cfe JG |
48 | } |
49 | ||
50 | struct lttng_userspace_probe_location_lookup_method * | |
51 | lttng_userspace_probe_location_lookup_method_function_elf_create(void) | |
52 | { | |
53 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
54 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
55 | ||
56 | elf_method = zmalloc(sizeof(*elf_method)); | |
57 | if (!elf_method) { | |
58 | PERROR("zmalloc"); | |
59 | goto end; | |
60 | } | |
61 | ||
62 | ret = &elf_method->parent; | |
63 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
64 | end: | |
65 | return ret; | |
66 | } | |
67 | ||
f4d0bb2e FD |
68 | struct lttng_userspace_probe_location_lookup_method * |
69 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(void) | |
70 | { | |
71 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
72 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
73 | ||
74 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
75 | if (!sdt_method) { | |
76 | PERROR("zmalloc"); | |
77 | goto end; | |
78 | } | |
79 | ||
80 | ret = &sdt_method->parent; | |
81 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
82 | end: | |
83 | return ret; | |
84 | } | |
85 | ||
1ce46cfe JG |
86 | enum lttng_userspace_probe_location_type lttng_userspace_probe_location_get_type( |
87 | const struct lttng_userspace_probe_location *location) | |
88 | { | |
89 | return location ? location->type : | |
90 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_UNKNOWN; | |
91 | } | |
92 | ||
93 | static | |
94 | void lttng_userspace_probe_location_function_destroy( | |
95 | struct lttng_userspace_probe_location *location) | |
96 | { | |
97 | struct lttng_userspace_probe_location_function *location_function = NULL; | |
98 | ||
99 | assert(location); | |
100 | ||
101 | location_function = container_of(location, | |
102 | struct lttng_userspace_probe_location_function, parent); | |
103 | ||
104 | assert(location_function); | |
105 | ||
106 | free(location_function->function_name); | |
107 | free(location_function->binary_path); | |
fe489250 | 108 | fd_handle_put(location_function->binary_fd); |
1ce46cfe JG |
109 | free(location); |
110 | } | |
111 | ||
f4d0bb2e FD |
112 | static |
113 | void lttng_userspace_probe_location_tracepoint_destroy( | |
114 | struct lttng_userspace_probe_location *location) | |
115 | { | |
116 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint = NULL; | |
117 | ||
118 | assert(location); | |
119 | ||
120 | location_tracepoint = container_of(location, | |
121 | struct lttng_userspace_probe_location_tracepoint, | |
122 | parent); | |
123 | ||
124 | assert(location_tracepoint); | |
125 | ||
126 | free(location_tracepoint->probe_name); | |
127 | free(location_tracepoint->provider_name); | |
128 | free(location_tracepoint->binary_path); | |
fe489250 | 129 | fd_handle_put(location_tracepoint->binary_fd); |
f4d0bb2e FD |
130 | free(location); |
131 | } | |
132 | ||
1ce46cfe JG |
133 | void lttng_userspace_probe_location_destroy( |
134 | struct lttng_userspace_probe_location *location) | |
135 | { | |
136 | if (!location) { | |
137 | return; | |
138 | } | |
139 | ||
140 | lttng_userspace_probe_location_lookup_method_destroy( | |
141 | location->lookup_method); | |
142 | ||
143 | switch (location->type) { | |
144 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
145 | lttng_userspace_probe_location_function_destroy(location); | |
146 | break; | |
f4d0bb2e FD |
147 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
148 | lttng_userspace_probe_location_tracepoint_destroy(location); | |
149 | break; | |
1ce46cfe | 150 | default: |
adf53c67 | 151 | abort(); |
1ce46cfe JG |
152 | } |
153 | } | |
154 | ||
dfcfa983 JR |
155 | /* Compare two file descriptors based on their inode and device numbers. */ |
156 | static bool fd_is_equal(int a, int b) | |
157 | { | |
158 | int ret; | |
159 | bool is_equal = false; | |
160 | struct stat a_stat, b_stat; | |
161 | ||
162 | if (a < 0 && b >= 0) { | |
163 | goto end; | |
164 | } | |
165 | ||
166 | if (b < 0 && a >= 0) { | |
167 | goto end; | |
168 | } | |
169 | ||
170 | if (a < 0 && b < 0) { | |
171 | if (a == -1 && b == -1) { | |
172 | is_equal = true; | |
173 | goto end; | |
174 | } | |
175 | ||
176 | /* Invalid state, abort. */ | |
177 | abort(); | |
178 | } | |
179 | ||
180 | /* Both are valid file descriptors. */ | |
181 | ret = fstat(a, &a_stat); | |
182 | if (ret) { | |
183 | PERROR("Failed to fstat userspace probe location binary fd %d", | |
184 | a); | |
185 | goto end; | |
186 | } | |
187 | ||
188 | ret = fstat(b, &b_stat); | |
189 | if (ret) { | |
190 | PERROR("Failed to fstat userspace probe location binary fd %d", | |
191 | b); | |
192 | goto end; | |
193 | } | |
194 | ||
195 | is_equal = (a_stat.st_ino == b_stat.st_ino) && | |
196 | (a_stat.st_dev == b_stat.st_dev); | |
197 | ||
198 | end: | |
199 | return is_equal; | |
200 | } | |
201 | ||
202 | static bool lttng_userspace_probe_location_function_is_equal( | |
203 | const struct lttng_userspace_probe_location *_a, | |
204 | const struct lttng_userspace_probe_location *_b) | |
205 | { | |
206 | bool is_equal = false; | |
207 | struct lttng_userspace_probe_location_function *a, *b; | |
208 | ||
209 | a = container_of(_a, struct lttng_userspace_probe_location_function, | |
210 | parent); | |
211 | b = container_of(_b, struct lttng_userspace_probe_location_function, | |
212 | parent); | |
213 | ||
214 | if (a->instrumentation_type != b->instrumentation_type) { | |
215 | goto end; | |
216 | } | |
217 | ||
218 | assert(a->function_name); | |
219 | assert(b->function_name); | |
220 | if (strcmp(a->function_name, b->function_name)) { | |
221 | goto end; | |
222 | } | |
223 | ||
224 | assert(a->binary_path); | |
225 | assert(b->binary_path); | |
226 | if (strcmp(a->binary_path, b->binary_path)) { | |
227 | goto end; | |
228 | } | |
229 | ||
fe489250 JG |
230 | is_equal = fd_is_equal(a->binary_fd ? fd_handle_get_fd(a->binary_fd) : -1, |
231 | b->binary_fd ? fd_handle_get_fd(b->binary_fd) : -1); | |
dfcfa983 JR |
232 | end: |
233 | return is_equal; | |
234 | } | |
235 | ||
1ce46cfe JG |
236 | static struct lttng_userspace_probe_location * |
237 | lttng_userspace_probe_location_function_create_no_check(const char *binary_path, | |
238 | const char *function_name, | |
239 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
240 | bool open_binary) | |
241 | { | |
242 | int binary_fd = -1; | |
fe489250 | 243 | struct fd_handle *binary_fd_handle = NULL; |
1ce46cfe JG |
244 | char *function_name_copy = NULL, *binary_path_copy = NULL; |
245 | struct lttng_userspace_probe_location *ret = NULL; | |
246 | struct lttng_userspace_probe_location_function *location; | |
247 | ||
248 | if (open_binary) { | |
249 | binary_fd = open(binary_path, O_RDONLY); | |
250 | if (binary_fd < 0) { | |
251 | PERROR("Error opening the binary"); | |
252 | goto error; | |
253 | } | |
fe489250 JG |
254 | |
255 | binary_fd_handle = fd_handle_create(binary_fd); | |
256 | if (!binary_fd) { | |
257 | goto error; | |
258 | } | |
259 | ||
260 | /* Ownership transferred to fd_handle. */ | |
1ce46cfe JG |
261 | binary_fd = -1; |
262 | } | |
263 | ||
264 | function_name_copy = lttng_strndup(function_name, LTTNG_SYMBOL_NAME_LEN); | |
265 | if (!function_name_copy) { | |
266 | PERROR("Error duplicating the function name"); | |
267 | goto error; | |
268 | } | |
269 | ||
270 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
271 | if (!binary_path_copy) { | |
272 | PERROR("Error duplicating the function name"); | |
273 | goto error; | |
274 | } | |
275 | ||
276 | location = zmalloc(sizeof(*location)); | |
277 | if (!location) { | |
278 | PERROR("Error allocating userspace probe location"); | |
279 | goto error; | |
280 | } | |
281 | ||
282 | location->function_name = function_name_copy; | |
283 | location->binary_path = binary_path_copy; | |
fe489250 JG |
284 | location->binary_fd = binary_fd_handle; |
285 | binary_fd_handle = NULL; | |
9d3981b5 JG |
286 | location->instrumentation_type = |
287 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY; | |
1ce46cfe JG |
288 | |
289 | ret = &location->parent; | |
290 | ret->lookup_method = lookup_method; | |
291 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION; | |
dfcfa983 | 292 | ret->equal = lttng_userspace_probe_location_function_is_equal; |
1ce46cfe JG |
293 | goto end; |
294 | ||
295 | error: | |
296 | free(function_name_copy); | |
297 | free(binary_path_copy); | |
298 | if (binary_fd >= 0) { | |
299 | if (close(binary_fd)) { | |
300 | PERROR("Error closing binary fd in error path"); | |
301 | } | |
302 | } | |
fe489250 | 303 | fd_handle_put(binary_fd_handle); |
1ce46cfe JG |
304 | end: |
305 | return ret; | |
306 | } | |
307 | ||
dfcfa983 JR |
308 | static bool lttng_userspace_probe_location_tracepoint_is_equal( |
309 | const struct lttng_userspace_probe_location *_a, | |
310 | const struct lttng_userspace_probe_location *_b) | |
311 | { | |
312 | bool is_equal = false; | |
313 | struct lttng_userspace_probe_location_tracepoint *a, *b; | |
314 | ||
315 | a = container_of(_a, struct lttng_userspace_probe_location_tracepoint, | |
316 | parent); | |
317 | b = container_of(_b, struct lttng_userspace_probe_location_tracepoint, | |
318 | parent); | |
319 | ||
320 | assert(a->probe_name); | |
321 | assert(b->probe_name); | |
322 | if (strcmp(a->probe_name, b->probe_name)) { | |
323 | goto end; | |
324 | } | |
325 | ||
326 | assert(a->provider_name); | |
327 | assert(b->provider_name); | |
328 | if (strcmp(a->provider_name, b->provider_name)) { | |
329 | goto end; | |
330 | } | |
331 | ||
332 | assert(a->binary_path); | |
333 | assert(b->binary_path); | |
334 | if (strcmp(a->binary_path, b->binary_path)) { | |
335 | goto end; | |
336 | } | |
337 | ||
fe489250 JG |
338 | is_equal = fd_is_equal(a->binary_fd ? fd_handle_get_fd(a->binary_fd) : -1, |
339 | b->binary_fd ? fd_handle_get_fd(b->binary_fd) : -1); | |
dfcfa983 JR |
340 | |
341 | end: | |
342 | return is_equal; | |
343 | } | |
344 | ||
f4d0bb2e FD |
345 | static struct lttng_userspace_probe_location * |
346 | lttng_userspace_probe_location_tracepoint_create_no_check(const char *binary_path, | |
347 | const char *provider_name, const char *probe_name, | |
348 | struct lttng_userspace_probe_location_lookup_method *lookup_method, | |
349 | bool open_binary) | |
350 | { | |
351 | int binary_fd = -1; | |
fe489250 | 352 | struct fd_handle *binary_fd_handle = NULL; |
f4d0bb2e FD |
353 | char *probe_name_copy = NULL; |
354 | char *provider_name_copy = NULL; | |
355 | char *binary_path_copy = NULL; | |
356 | struct lttng_userspace_probe_location *ret = NULL; | |
357 | struct lttng_userspace_probe_location_tracepoint *location; | |
358 | ||
359 | if (open_binary) { | |
360 | binary_fd = open(binary_path, O_RDONLY); | |
361 | if (binary_fd < 0) { | |
362 | PERROR("open"); | |
363 | goto error; | |
364 | } | |
fe489250 JG |
365 | |
366 | binary_fd_handle = fd_handle_create(binary_fd); | |
367 | if (!binary_fd) { | |
368 | goto error; | |
369 | } | |
370 | ||
371 | /* Ownership transferred to fd_handle. */ | |
f4d0bb2e FD |
372 | binary_fd = -1; |
373 | } | |
374 | ||
375 | probe_name_copy = lttng_strndup(probe_name, LTTNG_SYMBOL_NAME_LEN); | |
376 | if (!probe_name_copy) { | |
377 | PERROR("lttng_strndup"); | |
378 | goto error; | |
379 | } | |
380 | ||
381 | provider_name_copy = lttng_strndup(provider_name, LTTNG_SYMBOL_NAME_LEN); | |
382 | if (!provider_name_copy) { | |
383 | PERROR("lttng_strndup"); | |
384 | goto error; | |
385 | } | |
386 | ||
387 | binary_path_copy = lttng_strndup(binary_path, LTTNG_PATH_MAX); | |
388 | if (!binary_path_copy) { | |
389 | PERROR("lttng_strndup"); | |
390 | goto error; | |
391 | } | |
392 | ||
393 | location = zmalloc(sizeof(*location)); | |
394 | if (!location) { | |
395 | PERROR("zmalloc"); | |
396 | goto error; | |
397 | } | |
398 | ||
399 | location->probe_name = probe_name_copy; | |
400 | location->provider_name = provider_name_copy; | |
401 | location->binary_path = binary_path_copy; | |
fe489250 JG |
402 | location->binary_fd = binary_fd_handle; |
403 | binary_fd_handle = NULL; | |
f4d0bb2e FD |
404 | |
405 | ret = &location->parent; | |
406 | ret->lookup_method = lookup_method; | |
407 | ret->type = LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT; | |
dfcfa983 | 408 | ret->equal = lttng_userspace_probe_location_tracepoint_is_equal; |
f4d0bb2e FD |
409 | goto end; |
410 | ||
411 | error: | |
412 | free(probe_name_copy); | |
413 | free(provider_name_copy); | |
7c86453b | 414 | free(binary_path_copy); |
f4d0bb2e FD |
415 | if (binary_fd >= 0) { |
416 | if (close(binary_fd)) { | |
417 | PERROR("Error closing binary fd in error path"); | |
418 | } | |
419 | } | |
fe489250 | 420 | fd_handle_put(binary_fd_handle); |
f4d0bb2e FD |
421 | end: |
422 | return ret; | |
423 | } | |
424 | ||
1ce46cfe JG |
425 | struct lttng_userspace_probe_location * |
426 | lttng_userspace_probe_location_function_create(const char *binary_path, | |
427 | const char *function_name, | |
428 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
429 | { | |
430 | struct lttng_userspace_probe_location *ret = NULL; | |
431 | ||
432 | if (!binary_path || !function_name) { | |
433 | ERR("Invalid argument(s)"); | |
434 | goto end; | |
435 | } | |
436 | ||
437 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
438 | lookup_method)) { | |
439 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
440 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
441 | break; | |
442 | default: | |
443 | /* Invalid probe location lookup method. */ | |
444 | goto end; | |
445 | } | |
446 | ||
447 | ret = lttng_userspace_probe_location_function_create_no_check( | |
448 | binary_path, function_name, lookup_method, true); | |
449 | end: | |
450 | return ret; | |
451 | } | |
452 | ||
f4d0bb2e FD |
453 | struct lttng_userspace_probe_location * |
454 | lttng_userspace_probe_location_tracepoint_create(const char *binary_path, | |
455 | const char *provider_name, const char *probe_name, | |
456 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
457 | { | |
458 | struct lttng_userspace_probe_location *ret = NULL; | |
459 | ||
460 | if (!binary_path || !probe_name || !provider_name) { | |
461 | ERR("Invalid argument(s)"); | |
462 | goto end; | |
463 | } | |
464 | ||
465 | switch (lttng_userspace_probe_location_lookup_method_get_type( | |
466 | lookup_method)) { | |
467 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
468 | break; | |
469 | default: | |
470 | /* Invalid probe location lookup method. */ | |
471 | goto end; | |
472 | } | |
473 | ||
474 | ret = lttng_userspace_probe_location_tracepoint_create_no_check( | |
475 | binary_path, provider_name, probe_name, lookup_method, true); | |
476 | end: | |
477 | return ret; | |
478 | } | |
479 | ||
394357fe FD |
480 | static struct lttng_userspace_probe_location_lookup_method * |
481 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
482 | const struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
483 | { | |
484 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
485 | struct lttng_userspace_probe_location_lookup_method_elf *elf_method; | |
486 | ||
487 | assert(lookup_method); | |
488 | assert(lookup_method->type == | |
489 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF); | |
490 | ||
491 | elf_method = zmalloc(sizeof(*elf_method)); | |
492 | if (!elf_method) { | |
493 | PERROR("Error allocating ELF userspace probe lookup method"); | |
494 | goto error; | |
495 | } | |
496 | ||
497 | elf_method->parent.type = lookup_method->type; | |
498 | parent = &elf_method->parent; | |
499 | ||
500 | goto end; | |
501 | error: | |
502 | parent = NULL; | |
503 | end: | |
504 | return parent; | |
505 | } | |
506 | ||
f4d0bb2e FD |
507 | static struct lttng_userspace_probe_location_lookup_method * |
508 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
509 | struct lttng_userspace_probe_location_lookup_method *lookup_method) | |
510 | { | |
511 | struct lttng_userspace_probe_location_lookup_method *parent = NULL; | |
512 | struct lttng_userspace_probe_location_lookup_method_sdt *sdt_method; | |
513 | ||
514 | assert(lookup_method); | |
515 | assert(lookup_method->type == | |
516 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT); | |
517 | ||
518 | sdt_method = zmalloc(sizeof(*sdt_method)); | |
519 | if (!sdt_method) { | |
520 | PERROR("zmalloc"); | |
521 | goto error; | |
522 | } | |
523 | ||
524 | sdt_method->parent.type = lookup_method->type; | |
525 | parent = &sdt_method->parent; | |
526 | ||
527 | goto end; | |
528 | ||
529 | error: | |
530 | parent = NULL; | |
531 | end: | |
532 | return parent; | |
533 | } | |
534 | ||
394357fe FD |
535 | static struct lttng_userspace_probe_location * |
536 | lttng_userspace_probe_location_function_copy( | |
537 | const struct lttng_userspace_probe_location *location) | |
538 | { | |
539 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
540 | struct lttng_userspace_probe_location *new_location = NULL; | |
541 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
542 | const char *binary_path = NULL; |
543 | const char *function_name = NULL; | |
fe489250 | 544 | struct lttng_userspace_probe_location_function *function_location; |
394357fe FD |
545 | |
546 | assert(location); | |
547 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
fe489250 JG |
548 | function_location = container_of( |
549 | location, typeof(*function_location), parent); | |
394357fe | 550 | |
cc831309 FD |
551 | /* Get probe location fields */ |
552 | binary_path = lttng_userspace_probe_location_function_get_binary_path(location); | |
394357fe | 553 | if (!binary_path) { |
cc831309 | 554 | ERR("Userspace probe binary path is NULL"); |
394357fe FD |
555 | goto error; |
556 | } | |
557 | ||
cc831309 | 558 | function_name = lttng_userspace_probe_location_function_get_function_name(location); |
394357fe | 559 | if (!function_name) { |
cc831309 | 560 | ERR("Userspace probe function name is NULL"); |
394357fe FD |
561 | goto error; |
562 | } | |
563 | ||
394357fe FD |
564 | /* |
565 | * Duplicate probe location method fields | |
566 | */ | |
567 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
568 | location->lookup_method); | |
569 | switch (lookup_type) { | |
570 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
571 | lookup_method = | |
572 | lttng_userspace_probe_location_lookup_method_function_elf_copy( | |
573 | location->lookup_method); | |
574 | if (!lookup_method) { | |
fe489250 | 575 | goto error; |
394357fe FD |
576 | } |
577 | break; | |
578 | default: | |
579 | /* Invalid probe location lookup method. */ | |
fe489250 | 580 | goto error; |
394357fe FD |
581 | } |
582 | ||
583 | /* Create the probe_location */ | |
584 | new_location = lttng_userspace_probe_location_function_create_no_check( | |
cc831309 | 585 | binary_path, function_name, lookup_method, false); |
394357fe FD |
586 | if (!new_location) { |
587 | goto destroy_lookup_method; | |
588 | } | |
589 | ||
590 | /* Set the duplicated fd to the new probe_location */ | |
fe489250 JG |
591 | if (lttng_userspace_probe_location_function_set_binary_fd(new_location, |
592 | function_location->binary_fd) < 0) { | |
394357fe FD |
593 | goto destroy_probe_location; |
594 | } | |
595 | ||
596 | goto end; | |
597 | ||
598 | destroy_probe_location: | |
599 | lttng_userspace_probe_location_destroy(new_location); | |
600 | destroy_lookup_method: | |
601 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
394357fe | 602 | error: |
394357fe FD |
603 | new_location = NULL; |
604 | end: | |
605 | return new_location; | |
606 | } | |
607 | ||
f4d0bb2e FD |
608 | static struct lttng_userspace_probe_location * |
609 | lttng_userspace_probe_location_tracepoint_copy( | |
610 | const struct lttng_userspace_probe_location *location) | |
611 | { | |
612 | enum lttng_userspace_probe_location_lookup_method_type lookup_type; | |
613 | struct lttng_userspace_probe_location *new_location = NULL; | |
614 | struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; | |
cc831309 FD |
615 | const char *binary_path = NULL; |
616 | const char *probe_name = NULL; | |
617 | const char *provider_name = NULL; | |
fe489250 | 618 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; |
f4d0bb2e FD |
619 | |
620 | assert(location); | |
621 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
fe489250 JG |
622 | tracepoint_location = container_of( |
623 | location, typeof(*tracepoint_location), parent); | |
f4d0bb2e | 624 | |
fe489250 | 625 | /* Get probe location fields */ |
cc831309 | 626 | binary_path = lttng_userspace_probe_location_tracepoint_get_binary_path(location); |
f4d0bb2e | 627 | if (!binary_path) { |
cc831309 | 628 | ERR("Userspace probe binary path is NULL"); |
f4d0bb2e FD |
629 | goto error; |
630 | } | |
631 | ||
cc831309 | 632 | probe_name = lttng_userspace_probe_location_tracepoint_get_probe_name(location); |
f4d0bb2e | 633 | if (!probe_name) { |
cc831309 | 634 | ERR("Userspace probe probe name is NULL"); |
f4d0bb2e FD |
635 | goto error; |
636 | } | |
637 | ||
cc831309 | 638 | provider_name = lttng_userspace_probe_location_tracepoint_get_provider_name(location); |
f4d0bb2e | 639 | if (!provider_name) { |
cc831309 | 640 | ERR("Userspace probe provider name is NULL"); |
f4d0bb2e FD |
641 | goto error; |
642 | } | |
643 | ||
f4d0bb2e FD |
644 | /* |
645 | * Duplicate probe location method fields | |
646 | */ | |
647 | lookup_type = lttng_userspace_probe_location_lookup_method_get_type( | |
648 | location->lookup_method); | |
649 | switch (lookup_type) { | |
650 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: | |
651 | lookup_method = | |
652 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_copy( | |
653 | location->lookup_method); | |
654 | if (!lookup_method) { | |
fe489250 | 655 | goto error; |
f4d0bb2e FD |
656 | } |
657 | break; | |
658 | default: | |
659 | /* Invalid probe location lookup method. */ | |
fe489250 | 660 | goto error; |
f4d0bb2e FD |
661 | } |
662 | ||
663 | /* Create the probe_location */ | |
664 | new_location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
cc831309 | 665 | binary_path, provider_name, probe_name, lookup_method, false); |
f4d0bb2e FD |
666 | if (!new_location) { |
667 | goto destroy_lookup_method; | |
668 | } | |
669 | ||
670 | /* Set the duplicated fd to the new probe_location */ | |
fe489250 JG |
671 | if (lttng_userspace_probe_location_tracepoint_set_binary_fd(new_location, |
672 | tracepoint_location->binary_fd) < 0) { | |
f4d0bb2e FD |
673 | goto destroy_probe_location; |
674 | } | |
675 | ||
676 | goto end; | |
677 | ||
678 | destroy_probe_location: | |
679 | lttng_userspace_probe_location_destroy(new_location); | |
680 | destroy_lookup_method: | |
681 | lttng_userspace_probe_location_lookup_method_destroy(lookup_method); | |
f4d0bb2e | 682 | error: |
f4d0bb2e FD |
683 | new_location = NULL; |
684 | end: | |
685 | return new_location; | |
686 | } | |
687 | ||
1ce46cfe JG |
688 | const char *lttng_userspace_probe_location_function_get_binary_path( |
689 | const struct lttng_userspace_probe_location *location) | |
690 | { | |
691 | const char *ret = NULL; | |
692 | struct lttng_userspace_probe_location_function *function_location; | |
693 | ||
694 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
695 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
696 | ERR("Invalid argument(s)"); | |
697 | goto end; | |
698 | } | |
699 | ||
700 | function_location = container_of(location, | |
701 | struct lttng_userspace_probe_location_function, | |
702 | parent); | |
703 | ret = function_location->binary_path; | |
704 | end: | |
705 | return ret; | |
706 | } | |
707 | ||
f4d0bb2e FD |
708 | const char *lttng_userspace_probe_location_tracepoint_get_binary_path( |
709 | const struct lttng_userspace_probe_location *location) | |
710 | { | |
711 | const char *ret = NULL; | |
712 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
713 | ||
714 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
715 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
716 | ERR("Invalid argument(s)"); | |
717 | goto end; | |
718 | } | |
719 | ||
720 | tracepoint_location = container_of(location, | |
721 | struct lttng_userspace_probe_location_tracepoint, | |
722 | parent); | |
723 | ret = tracepoint_location->binary_path; | |
724 | end: | |
725 | return ret; | |
726 | } | |
727 | ||
1ce46cfe JG |
728 | const char *lttng_userspace_probe_location_function_get_function_name( |
729 | const struct lttng_userspace_probe_location *location) | |
730 | { | |
731 | const char *ret = NULL; | |
732 | struct lttng_userspace_probe_location_function *function_location; | |
733 | ||
734 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
735 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
736 | ERR("Invalid argument(s)"); | |
737 | goto end; | |
738 | } | |
739 | ||
740 | function_location = container_of(location, | |
741 | struct lttng_userspace_probe_location_function, parent); | |
742 | ret = function_location->function_name; | |
743 | end: | |
744 | return ret; | |
745 | } | |
746 | ||
f4d0bb2e FD |
747 | const char *lttng_userspace_probe_location_tracepoint_get_probe_name( |
748 | const struct lttng_userspace_probe_location *location) | |
749 | { | |
750 | const char *ret = NULL; | |
751 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
752 | ||
753 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
754 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
755 | ERR("Invalid argument(s)"); | |
756 | goto end; | |
757 | } | |
758 | ||
759 | tracepoint_location = container_of(location, | |
760 | struct lttng_userspace_probe_location_tracepoint, parent); | |
761 | ret = tracepoint_location->probe_name; | |
762 | end: | |
763 | return ret; | |
764 | } | |
765 | ||
766 | const char *lttng_userspace_probe_location_tracepoint_get_provider_name( | |
767 | const struct lttng_userspace_probe_location *location) | |
768 | { | |
769 | const char *ret = NULL; | |
770 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
771 | ||
772 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
773 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
774 | ERR("Invalid argument(s)"); | |
775 | goto end; | |
776 | } | |
777 | ||
778 | tracepoint_location = container_of(location, | |
779 | struct lttng_userspace_probe_location_tracepoint, parent); | |
780 | ret = tracepoint_location->provider_name; | |
781 | end: | |
782 | return ret; | |
783 | } | |
784 | ||
1ce46cfe JG |
785 | int lttng_userspace_probe_location_function_get_binary_fd( |
786 | const struct lttng_userspace_probe_location *location) | |
787 | { | |
788 | int ret = -1; | |
789 | struct lttng_userspace_probe_location_function *function_location; | |
790 | ||
791 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
792 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
793 | ERR("Invalid argument(s)"); | |
794 | goto end; | |
795 | } | |
796 | ||
797 | function_location = container_of(location, | |
798 | struct lttng_userspace_probe_location_function, parent); | |
fe489250 JG |
799 | ret = function_location->binary_fd ? |
800 | fd_handle_get_fd(function_location->binary_fd) : -1; | |
1ce46cfe JG |
801 | end: |
802 | return ret; | |
803 | } | |
804 | ||
9d3981b5 JG |
805 | enum lttng_userspace_probe_location_function_instrumentation_type |
806 | lttng_userspace_probe_location_function_get_instrumentation_type( | |
807 | const struct lttng_userspace_probe_location *location) | |
808 | { | |
809 | enum lttng_userspace_probe_location_function_instrumentation_type type; | |
810 | struct lttng_userspace_probe_location_function *function_location; | |
811 | ||
812 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
813 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
814 | ERR("Invalid argument(s)"); | |
815 | type = LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_UNKNOWN; | |
816 | goto end; | |
817 | } | |
818 | ||
819 | function_location = container_of(location, | |
820 | struct lttng_userspace_probe_location_function, parent); | |
821 | type = function_location->instrumentation_type; | |
822 | end: | |
823 | return type; | |
824 | } | |
825 | ||
826 | enum lttng_userspace_probe_location_status | |
827 | lttng_userspace_probe_location_function_set_instrumentation_type( | |
828 | const struct lttng_userspace_probe_location *location, | |
829 | enum lttng_userspace_probe_location_function_instrumentation_type instrumentation_type) | |
830 | { | |
831 | enum lttng_userspace_probe_location_status status = | |
832 | LTTNG_USERSPACE_PROBE_LOCATION_STATUS_OK; | |
833 | struct lttng_userspace_probe_location_function *function_location; | |
834 | ||
835 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
836 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION || | |
837 | instrumentation_type != | |
838 | LTTNG_USERSPACE_PROBE_LOCATION_FUNCTION_INSTRUMENTATION_TYPE_ENTRY) { | |
839 | ERR("Invalid argument(s)"); | |
840 | status = LTTNG_USERSPACE_PROBE_LOCATION_STATUS_INVALID; | |
841 | goto end; | |
842 | } | |
843 | ||
844 | function_location = container_of(location, | |
845 | struct lttng_userspace_probe_location_function, parent); | |
846 | function_location->instrumentation_type = instrumentation_type; | |
847 | end: | |
848 | return status; | |
849 | } | |
850 | ||
f4d0bb2e FD |
851 | int lttng_userspace_probe_location_tracepoint_get_binary_fd( |
852 | const struct lttng_userspace_probe_location *location) | |
853 | { | |
854 | int ret = -1; | |
855 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
856 | ||
857 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
858 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
859 | ERR("Invalid argument(s)"); | |
860 | goto end; | |
861 | } | |
862 | ||
863 | tracepoint_location = container_of(location, | |
864 | struct lttng_userspace_probe_location_tracepoint, parent); | |
fe489250 JG |
865 | ret = tracepoint_location->binary_fd ? |
866 | fd_handle_get_fd(tracepoint_location->binary_fd) : -1; | |
f4d0bb2e FD |
867 | end: |
868 | return ret; | |
869 | } | |
870 | ||
1ce46cfe JG |
871 | static struct lttng_userspace_probe_location_lookup_method * |
872 | lttng_userspace_probe_location_function_get_lookup_method( | |
873 | const struct lttng_userspace_probe_location *location) | |
874 | { | |
875 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
876 | ||
877 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
878 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION) { | |
879 | ERR("Invalid argument(s)"); | |
880 | goto end; | |
881 | } | |
882 | ||
883 | ret = location->lookup_method; | |
884 | end: | |
885 | return ret; | |
886 | } | |
887 | ||
f4d0bb2e FD |
888 | static struct lttng_userspace_probe_location_lookup_method * |
889 | lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
890 | const struct lttng_userspace_probe_location *location) | |
891 | { | |
892 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
893 | ||
894 | if (!location || lttng_userspace_probe_location_get_type(location) != | |
895 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT) { | |
896 | ERR("Invalid argument(s)"); | |
897 | goto end; | |
898 | } | |
899 | ||
900 | ret = location->lookup_method; | |
901 | end: | |
902 | return ret; | |
903 | } | |
904 | ||
87597c2c | 905 | const struct lttng_userspace_probe_location_lookup_method * |
1ce46cfe JG |
906 | lttng_userspace_probe_location_get_lookup_method( |
907 | const struct lttng_userspace_probe_location *location) | |
908 | { | |
909 | struct lttng_userspace_probe_location_lookup_method *ret = NULL; | |
910 | ||
911 | assert(location); | |
912 | switch (location->type) { | |
913 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
914 | ret = lttng_userspace_probe_location_function_get_lookup_method( | |
915 | location); | |
916 | break; | |
f4d0bb2e FD |
917 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
918 | ret = lttng_userspace_probe_location_tracepoint_get_lookup_method( | |
919 | location); | |
920 | break; | |
1ce46cfe JG |
921 | default: |
922 | ERR("Unknowned lookup method."); | |
923 | break; | |
924 | } | |
925 | return ret; | |
926 | } | |
927 | ||
928 | static | |
929 | int lttng_userspace_probe_location_lookup_method_serialize( | |
930 | struct lttng_userspace_probe_location_lookup_method *method, | |
e368fb43 | 931 | struct lttng_payload *payload) |
1ce46cfe JG |
932 | { |
933 | int ret; | |
934 | struct lttng_userspace_probe_location_lookup_method_comm | |
935 | lookup_method_comm; | |
936 | ||
937 | lookup_method_comm.type = (int8_t) (method ? method->type : | |
938 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT); | |
e368fb43 JG |
939 | if (payload) { |
940 | ret = lttng_dynamic_buffer_append(&payload->buffer, &lookup_method_comm, | |
1ce46cfe JG |
941 | sizeof(lookup_method_comm)); |
942 | if (ret) { | |
943 | goto end; | |
944 | } | |
945 | } | |
f4d0bb2e FD |
946 | ret = sizeof(lookup_method_comm); |
947 | end: | |
948 | return ret; | |
949 | } | |
950 | ||
951 | static | |
952 | int lttng_userspace_probe_location_function_serialize( | |
953 | const struct lttng_userspace_probe_location *location, | |
e368fb43 | 954 | struct lttng_payload *payload) |
f4d0bb2e FD |
955 | { |
956 | int ret; | |
957 | size_t function_name_len, binary_path_len; | |
958 | struct lttng_userspace_probe_location_function *location_function; | |
959 | struct lttng_userspace_probe_location_function_comm location_function_comm; | |
960 | ||
961 | assert(location); | |
962 | assert(lttng_userspace_probe_location_get_type(location) == | |
963 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
964 | ||
965 | location_function = container_of(location, | |
966 | struct lttng_userspace_probe_location_function, | |
967 | parent); | |
968 | if (!location_function->function_name || !location_function->binary_path) { | |
969 | ret = -LTTNG_ERR_INVALID; | |
970 | goto end; | |
971 | } | |
972 | ||
e368fb43 | 973 | if (payload && location_function->binary_fd < 0) { |
f4d0bb2e FD |
974 | ret = -LTTNG_ERR_INVALID; |
975 | goto end; | |
976 | } | |
977 | ||
f4d0bb2e FD |
978 | function_name_len = strlen(location_function->function_name); |
979 | if (function_name_len == 0) { | |
980 | ret = -LTTNG_ERR_INVALID; | |
981 | goto end; | |
982 | } | |
983 | binary_path_len = strlen(location_function->binary_path); | |
984 | if (binary_path_len == 0) { | |
985 | ret = -LTTNG_ERR_INVALID; | |
986 | goto end; | |
987 | } | |
988 | ||
989 | location_function_comm.function_name_len = function_name_len + 1; | |
990 | location_function_comm.binary_path_len = binary_path_len + 1; | |
991 | ||
e368fb43 JG |
992 | if (payload) { |
993 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
f4d0bb2e FD |
994 | &location_function_comm, |
995 | sizeof(location_function_comm)); | |
996 | if (ret) { | |
997 | ret = -LTTNG_ERR_INVALID; | |
998 | goto end; | |
999 | } | |
e368fb43 | 1000 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1001 | location_function->function_name, |
1002 | location_function_comm.function_name_len); | |
1003 | if (ret) { | |
1004 | ret = -LTTNG_ERR_INVALID; | |
1005 | goto end; | |
1006 | } | |
e368fb43 | 1007 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1008 | location_function->binary_path, |
1009 | location_function_comm.binary_path_len); | |
1010 | if (ret) { | |
1011 | ret = -LTTNG_ERR_INVALID; | |
1012 | goto end; | |
1013 | } | |
fe489250 | 1014 | ret = lttng_payload_push_fd_handle( |
e368fb43 JG |
1015 | payload, location_function->binary_fd); |
1016 | if (ret) { | |
1017 | ret = -LTTNG_ERR_INVALID; | |
1018 | goto end; | |
1019 | } | |
f4d0bb2e FD |
1020 | } |
1021 | ret = sizeof(location_function_comm) + | |
1022 | location_function_comm.function_name_len + | |
1023 | location_function_comm.binary_path_len; | |
1ce46cfe JG |
1024 | end: |
1025 | return ret; | |
1026 | } | |
1027 | ||
1028 | static | |
f4d0bb2e | 1029 | int lttng_userspace_probe_location_tracepoint_serialize( |
1ce46cfe | 1030 | const struct lttng_userspace_probe_location *location, |
e368fb43 | 1031 | struct lttng_payload *payload) |
1ce46cfe JG |
1032 | { |
1033 | int ret; | |
f4d0bb2e FD |
1034 | size_t probe_name_len, provider_name_len, binary_path_len; |
1035 | struct lttng_userspace_probe_location_tracepoint *location_tracepoint; | |
1036 | struct lttng_userspace_probe_location_tracepoint_comm location_tracepoint_comm; | |
1ce46cfe JG |
1037 | |
1038 | assert(location); | |
1039 | assert(lttng_userspace_probe_location_get_type(location) == | |
f4d0bb2e | 1040 | LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); |
1ce46cfe | 1041 | |
f4d0bb2e FD |
1042 | location_tracepoint = container_of(location, |
1043 | struct lttng_userspace_probe_location_tracepoint, | |
1ce46cfe | 1044 | parent); |
f4d0bb2e FD |
1045 | if (!location_tracepoint->probe_name || |
1046 | !location_tracepoint->provider_name || | |
1047 | !location_tracepoint->binary_path) { | |
1ce46cfe JG |
1048 | ret = -LTTNG_ERR_INVALID; |
1049 | goto end; | |
1050 | } | |
1051 | ||
e368fb43 | 1052 | if (payload && location_tracepoint->binary_fd < 0) { |
1ce46cfe JG |
1053 | ret = -LTTNG_ERR_INVALID; |
1054 | goto end; | |
1055 | } | |
1056 | ||
f4d0bb2e FD |
1057 | probe_name_len = strlen(location_tracepoint->probe_name); |
1058 | if (probe_name_len == 0) { | |
1ce46cfe JG |
1059 | ret = -LTTNG_ERR_INVALID; |
1060 | goto end; | |
1061 | } | |
f4d0bb2e FD |
1062 | |
1063 | provider_name_len = strlen(location_tracepoint->provider_name); | |
1064 | if (provider_name_len == 0) { | |
1065 | ret = -LTTNG_ERR_INVALID; | |
1066 | goto end; | |
1067 | } | |
1068 | ||
1069 | binary_path_len = strlen(location_tracepoint->binary_path); | |
1ce46cfe JG |
1070 | if (binary_path_len == 0) { |
1071 | ret = -LTTNG_ERR_INVALID; | |
1072 | goto end; | |
1073 | } | |
1074 | ||
f4d0bb2e FD |
1075 | location_tracepoint_comm.probe_name_len = probe_name_len + 1; |
1076 | location_tracepoint_comm.provider_name_len = provider_name_len + 1; | |
1077 | location_tracepoint_comm.binary_path_len = binary_path_len + 1; | |
1ce46cfe | 1078 | |
e368fb43 JG |
1079 | if (payload) { |
1080 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
f4d0bb2e FD |
1081 | &location_tracepoint_comm, |
1082 | sizeof(location_tracepoint_comm)); | |
1ce46cfe JG |
1083 | if (ret) { |
1084 | ret = -LTTNG_ERR_INVALID; | |
1085 | goto end; | |
1086 | } | |
e368fb43 | 1087 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1088 | location_tracepoint->probe_name, |
1089 | location_tracepoint_comm.probe_name_len); | |
1ce46cfe JG |
1090 | if (ret) { |
1091 | ret = -LTTNG_ERR_INVALID; | |
1092 | goto end; | |
1093 | } | |
e368fb43 | 1094 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1095 | location_tracepoint->provider_name, |
1096 | location_tracepoint_comm.provider_name_len); | |
1097 | if (ret) { | |
1098 | ret = -LTTNG_ERR_INVALID; | |
1099 | goto end; | |
1100 | } | |
e368fb43 | 1101 | ret = lttng_dynamic_buffer_append(&payload->buffer, |
f4d0bb2e FD |
1102 | location_tracepoint->binary_path, |
1103 | location_tracepoint_comm.binary_path_len); | |
1ce46cfe JG |
1104 | if (ret) { |
1105 | ret = -LTTNG_ERR_INVALID; | |
1106 | goto end; | |
1107 | } | |
fe489250 | 1108 | ret = lttng_payload_push_fd_handle( |
e368fb43 JG |
1109 | payload, location_tracepoint->binary_fd); |
1110 | if (ret) { | |
1111 | ret = -LTTNG_ERR_INVALID; | |
1112 | goto end; | |
1113 | } | |
1ce46cfe | 1114 | } |
e368fb43 | 1115 | |
f4d0bb2e FD |
1116 | ret = sizeof(location_tracepoint_comm) + |
1117 | location_tracepoint_comm.probe_name_len + | |
1118 | location_tracepoint_comm.provider_name_len + | |
1119 | location_tracepoint_comm.binary_path_len; | |
1ce46cfe JG |
1120 | end: |
1121 | return ret; | |
1122 | } | |
1123 | ||
1124 | LTTNG_HIDDEN | |
1125 | int lttng_userspace_probe_location_serialize( | |
1126 | const struct lttng_userspace_probe_location *location, | |
e368fb43 | 1127 | struct lttng_payload *payload) |
1ce46cfe JG |
1128 | { |
1129 | int ret, buffer_use = 0; | |
1130 | struct lttng_userspace_probe_location_comm location_generic_comm; | |
1131 | ||
1132 | if (!location) { | |
1133 | ERR("Invalid argument(s)"); | |
1134 | ret = -LTTNG_ERR_INVALID; | |
1135 | goto end; | |
1136 | } | |
1137 | ||
56f0bc67 JG |
1138 | memset(&location_generic_comm, 0, sizeof(location_generic_comm)); |
1139 | ||
1ce46cfe | 1140 | location_generic_comm.type = (int8_t) location->type; |
e368fb43 JG |
1141 | if (payload) { |
1142 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
1143 | &location_generic_comm, | |
1ce46cfe JG |
1144 | sizeof(location_generic_comm)); |
1145 | if (ret) { | |
1146 | goto end; | |
1147 | } | |
1148 | } | |
1149 | buffer_use += sizeof(location_generic_comm); | |
1150 | ||
1151 | switch (lttng_userspace_probe_location_get_type(location)) { | |
1152 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1153 | ret = lttng_userspace_probe_location_function_serialize( | |
e368fb43 | 1154 | location, payload); |
1ce46cfe | 1155 | break; |
f4d0bb2e FD |
1156 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1157 | ret = lttng_userspace_probe_location_tracepoint_serialize( | |
e368fb43 | 1158 | location, payload); |
f4d0bb2e | 1159 | break; |
1ce46cfe JG |
1160 | default: |
1161 | ERR("Unsupported probe location type"); | |
1162 | ret = -LTTNG_ERR_INVALID; | |
1163 | goto end; | |
1164 | } | |
1165 | if (ret < 0) { | |
1166 | goto end; | |
1167 | } | |
1168 | buffer_use += ret; | |
1169 | ||
1170 | ret = lttng_userspace_probe_location_lookup_method_serialize( | |
e368fb43 | 1171 | location->lookup_method, payload); |
1ce46cfe JG |
1172 | if (ret < 0) { |
1173 | goto end; | |
1174 | } | |
1175 | ret += buffer_use; | |
1176 | end: | |
1177 | return ret; | |
1178 | } | |
1179 | ||
1180 | static | |
e368fb43 JG |
1181 | int lttng_userspace_probe_location_function_create_from_payload( |
1182 | struct lttng_payload_view *view, | |
1ce46cfe JG |
1183 | struct lttng_userspace_probe_location **location) |
1184 | { | |
1185 | struct lttng_userspace_probe_location_function_comm *location_function_comm; | |
1186 | const char *function_name_src, *binary_path_src; | |
1187 | char *function_name = NULL, *binary_path = NULL; | |
1188 | int ret = 0; | |
e368fb43 | 1189 | size_t expected_size; |
fe489250 | 1190 | struct fd_handle *binary_fd = lttng_payload_view_pop_fd_handle(view); |
1ce46cfe | 1191 | |
1ce46cfe JG |
1192 | assert(location); |
1193 | ||
e368fb43 JG |
1194 | if (view->buffer.size < sizeof(*location_function_comm)) { |
1195 | ret = -LTTNG_ERR_INVALID; | |
1196 | goto end; | |
1197 | } | |
1198 | ||
1ce46cfe | 1199 | location_function_comm = |
e368fb43 | 1200 | (typeof(location_function_comm)) view->buffer.data; |
1ce46cfe | 1201 | |
e368fb43 | 1202 | expected_size = sizeof(*location_function_comm) + |
1ce46cfe JG |
1203 | location_function_comm->function_name_len + |
1204 | location_function_comm->binary_path_len; | |
1205 | ||
e368fb43 | 1206 | if (view->buffer.size < expected_size) { |
1ce46cfe JG |
1207 | ret = -LTTNG_ERR_INVALID; |
1208 | goto end; | |
1209 | } | |
1210 | ||
e368fb43 | 1211 | function_name_src = view->buffer.data + sizeof(*location_function_comm); |
1ce46cfe JG |
1212 | binary_path_src = function_name_src + |
1213 | location_function_comm->function_name_len; | |
1214 | ||
1215 | if (function_name_src[location_function_comm->function_name_len - 1] != '\0') { | |
1216 | ret = -LTTNG_ERR_INVALID; | |
1217 | goto end; | |
1218 | } | |
1219 | if (binary_path_src[location_function_comm->binary_path_len - 1] != '\0') { | |
1220 | ret = -LTTNG_ERR_INVALID; | |
1221 | goto end; | |
1222 | } | |
1223 | ||
1224 | function_name = lttng_strndup(function_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1225 | if (!function_name) { | |
1226 | PERROR("lttng_strndup"); | |
2aa28610 | 1227 | ret = -LTTNG_ERR_NOMEM; |
1ce46cfe JG |
1228 | goto end; |
1229 | } | |
1230 | ||
1231 | binary_path = lttng_strndup(binary_path_src, LTTNG_PATH_MAX); | |
1232 | if (!binary_path) { | |
1233 | PERROR("lttng_strndup"); | |
2aa28610 | 1234 | ret = -LTTNG_ERR_NOMEM; |
1ce46cfe JG |
1235 | goto end; |
1236 | } | |
1237 | ||
1238 | *location = lttng_userspace_probe_location_function_create_no_check( | |
1239 | binary_path, function_name, NULL, false); | |
1240 | if (!(*location)) { | |
1241 | ret = -LTTNG_ERR_INVALID; | |
1242 | goto end; | |
1243 | } | |
1244 | ||
e368fb43 JG |
1245 | ret = lttng_userspace_probe_location_function_set_binary_fd( |
1246 | *location, binary_fd); | |
1247 | if (ret) { | |
e368fb43 JG |
1248 | ret = -LTTNG_ERR_INVALID; |
1249 | goto end; | |
1250 | } | |
1251 | ||
1ce46cfe JG |
1252 | ret = (int) expected_size; |
1253 | end: | |
fe489250 | 1254 | fd_handle_put(binary_fd); |
1ce46cfe JG |
1255 | free(function_name); |
1256 | free(binary_path); | |
1257 | return ret; | |
1258 | } | |
1259 | ||
f4d0bb2e | 1260 | static |
e368fb43 JG |
1261 | int lttng_userspace_probe_location_tracepoint_create_from_payload( |
1262 | struct lttng_payload_view *view, | |
f4d0bb2e FD |
1263 | struct lttng_userspace_probe_location **location) |
1264 | { | |
1265 | struct lttng_userspace_probe_location_tracepoint_comm *location_tracepoint_comm; | |
1266 | const char *probe_name_src, *provider_name_src, *binary_path_src; | |
1267 | char *probe_name = NULL, *provider_name = NULL, *binary_path = NULL; | |
1268 | int ret = 0; | |
e368fb43 | 1269 | size_t expected_size; |
fe489250 | 1270 | struct fd_handle *binary_fd = lttng_payload_view_pop_fd_handle(view); |
f4d0bb2e | 1271 | |
f4d0bb2e FD |
1272 | assert(location); |
1273 | ||
e368fb43 JG |
1274 | if (binary_fd < 0) { |
1275 | ret = -LTTNG_ERR_INVALID; | |
1276 | goto end; | |
1277 | } | |
1278 | ||
1279 | if (view->buffer.size < sizeof(*location_tracepoint_comm)) { | |
1280 | ret = -LTTNG_ERR_INVALID; | |
1281 | goto end; | |
1282 | } | |
1283 | ||
f4d0bb2e | 1284 | location_tracepoint_comm = |
e368fb43 | 1285 | (typeof(location_tracepoint_comm)) view->buffer.data; |
f4d0bb2e | 1286 | |
e368fb43 | 1287 | expected_size = sizeof(*location_tracepoint_comm) + |
f4d0bb2e FD |
1288 | location_tracepoint_comm->probe_name_len + |
1289 | location_tracepoint_comm->provider_name_len + | |
1290 | location_tracepoint_comm->binary_path_len; | |
1291 | ||
e368fb43 | 1292 | if (view->buffer.size < expected_size) { |
f4d0bb2e FD |
1293 | ret = -LTTNG_ERR_INVALID; |
1294 | goto end; | |
1295 | } | |
1296 | ||
e368fb43 | 1297 | probe_name_src = view->buffer.data + sizeof(*location_tracepoint_comm); |
f4d0bb2e FD |
1298 | provider_name_src = probe_name_src + |
1299 | location_tracepoint_comm->probe_name_len; | |
1300 | binary_path_src = provider_name_src + | |
1301 | location_tracepoint_comm->provider_name_len; | |
1302 | ||
1303 | if (probe_name_src[location_tracepoint_comm->probe_name_len - 1] != '\0') { | |
1304 | ret = -LTTNG_ERR_INVALID; | |
1305 | goto end; | |
1306 | } | |
1307 | ||
1308 | if (provider_name_src[location_tracepoint_comm->provider_name_len - 1] != '\0') { | |
1309 | ret = -LTTNG_ERR_INVALID; | |
1310 | goto end; | |
1311 | } | |
1312 | ||
1313 | if (binary_path_src[location_tracepoint_comm->binary_path_len - 1] != '\0') { | |
1314 | ret = -LTTNG_ERR_INVALID; | |
1315 | goto end; | |
1316 | } | |
1317 | ||
1318 | probe_name = lttng_strndup(probe_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1319 | if (!probe_name) { | |
1320 | PERROR("lttng_strndup"); | |
1321 | goto end; | |
1322 | } | |
1323 | provider_name = lttng_strndup(provider_name_src, LTTNG_SYMBOL_NAME_LEN); | |
1324 | if (!provider_name) { | |
1325 | PERROR("lttng_strndup"); | |
1326 | goto end; | |
1327 | } | |
1328 | ||
1329 | binary_path = lttng_strndup(binary_path_src, LTTNG_SYMBOL_NAME_LEN); | |
1330 | if (!binary_path) { | |
1331 | PERROR("lttng_strndup"); | |
1332 | goto end; | |
1333 | } | |
1334 | ||
1335 | *location = lttng_userspace_probe_location_tracepoint_create_no_check( | |
1336 | binary_path, provider_name, probe_name, NULL, false); | |
1337 | if (!(*location)) { | |
1338 | ret = -LTTNG_ERR_INVALID; | |
1339 | goto end; | |
1340 | } | |
1341 | ||
e368fb43 JG |
1342 | ret = lttng_userspace_probe_location_tracepoint_set_binary_fd( |
1343 | *location, binary_fd); | |
1344 | if (ret) { | |
e368fb43 JG |
1345 | ret = -LTTNG_ERR_INVALID; |
1346 | goto end; | |
1347 | } | |
1348 | ||
f4d0bb2e FD |
1349 | ret = (int) expected_size; |
1350 | end: | |
fe489250 | 1351 | fd_handle_put(binary_fd); |
f4d0bb2e FD |
1352 | free(probe_name); |
1353 | free(provider_name); | |
1354 | free(binary_path); | |
1355 | return ret; | |
1356 | } | |
1357 | ||
1ce46cfe | 1358 | static |
e368fb43 JG |
1359 | int lttng_userspace_probe_location_lookup_method_create_from_payload( |
1360 | struct lttng_payload_view *view, | |
1ce46cfe JG |
1361 | struct lttng_userspace_probe_location_lookup_method **lookup_method) |
1362 | { | |
1363 | int ret; | |
1364 | struct lttng_userspace_probe_location_lookup_method_comm *lookup_comm; | |
1365 | enum lttng_userspace_probe_location_lookup_method_type type; | |
1366 | ||
e368fb43 | 1367 | assert(view); |
1ce46cfe JG |
1368 | assert(lookup_method); |
1369 | ||
e368fb43 | 1370 | if (view->buffer.size < sizeof(*lookup_comm)) { |
1ce46cfe JG |
1371 | ret = -LTTNG_ERR_INVALID; |
1372 | goto end; | |
1373 | } | |
1374 | ||
e368fb43 | 1375 | lookup_comm = (typeof(lookup_comm)) view->buffer.data; |
1ce46cfe JG |
1376 | type = (enum lttng_userspace_probe_location_lookup_method_type) |
1377 | lookup_comm->type; | |
1378 | switch (type) { | |
1379 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_DEFAULT: | |
1380 | *lookup_method = NULL; | |
1381 | break; | |
1382 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF: | |
1383 | *lookup_method = | |
1384 | lttng_userspace_probe_location_lookup_method_function_elf_create(); | |
1385 | if (!(*lookup_method)) { | |
1386 | ret = -LTTNG_ERR_INVALID; | |
1387 | goto end; | |
1388 | } | |
1389 | break; | |
f4d0bb2e FD |
1390 | case LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT: |
1391 | *lookup_method = | |
1392 | lttng_userspace_probe_location_lookup_method_tracepoint_sdt_create(); | |
1393 | if (!(*lookup_method)) { | |
1394 | ret = -LTTNG_ERR_INVALID; | |
1395 | goto end; | |
1396 | } | |
1397 | break; | |
1ce46cfe JG |
1398 | default: |
1399 | ret = -LTTNG_ERR_INVALID; | |
1400 | goto end; | |
1401 | } | |
1402 | ||
1403 | ret = sizeof(*lookup_comm); | |
1404 | end: | |
1405 | return ret; | |
1406 | } | |
1407 | ||
1408 | LTTNG_HIDDEN | |
e368fb43 JG |
1409 | int lttng_userspace_probe_location_create_from_payload( |
1410 | struct lttng_payload_view *view, | |
1ce46cfe JG |
1411 | struct lttng_userspace_probe_location **location) |
1412 | { | |
1413 | struct lttng_userspace_probe_location_lookup_method *lookup_method; | |
1414 | struct lttng_userspace_probe_location_comm *probe_location_comm; | |
1415 | enum lttng_userspace_probe_location_type type; | |
1ce46cfe JG |
1416 | int consumed = 0; |
1417 | int ret; | |
1418 | ||
e368fb43 | 1419 | assert(view); |
1ce46cfe JG |
1420 | assert(location); |
1421 | ||
1422 | lookup_method = NULL; | |
1423 | ||
e368fb43 | 1424 | if (view->buffer.size <= sizeof(*probe_location_comm)) { |
1ce46cfe JG |
1425 | ret = -LTTNG_ERR_INVALID; |
1426 | goto end; | |
1427 | } | |
1428 | ||
e368fb43 | 1429 | probe_location_comm = (typeof(probe_location_comm)) view->buffer.data; |
1ce46cfe JG |
1430 | type = (enum lttng_userspace_probe_location_type) probe_location_comm->type; |
1431 | consumed += sizeof(*probe_location_comm); | |
1432 | ||
1433 | switch (type) { | |
1434 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1435 | { | |
e368fb43 JG |
1436 | struct lttng_payload_view location_view = |
1437 | lttng_payload_view_from_view( | |
1438 | view, consumed, -1); | |
1ce46cfe | 1439 | |
e368fb43 JG |
1440 | ret = lttng_userspace_probe_location_function_create_from_payload( |
1441 | &location_view, location); | |
1ce46cfe JG |
1442 | if (ret < 0) { |
1443 | goto end; | |
1444 | } | |
1445 | break; | |
1446 | } | |
f4d0bb2e FD |
1447 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1448 | { | |
e368fb43 JG |
1449 | struct lttng_payload_view location_view = |
1450 | lttng_payload_view_from_view(view, consumed, -1); | |
f4d0bb2e | 1451 | |
e368fb43 JG |
1452 | ret = lttng_userspace_probe_location_tracepoint_create_from_payload( |
1453 | &location_view, location); | |
f4d0bb2e FD |
1454 | if (ret < 0) { |
1455 | goto end; | |
1456 | } | |
1457 | break; | |
1458 | } | |
1ce46cfe JG |
1459 | default: |
1460 | ret = -LTTNG_ERR_INVALID; | |
1461 | goto end; | |
1462 | } | |
1463 | ||
1464 | consumed += ret; | |
e368fb43 | 1465 | if (view->buffer.size <= consumed) { |
1ce46cfe JG |
1466 | ret = -LTTNG_ERR_INVALID; |
1467 | goto end; | |
1468 | } | |
1469 | ||
e368fb43 JG |
1470 | { |
1471 | struct lttng_payload_view lookup_method_view = | |
1472 | lttng_payload_view_from_view( | |
1473 | view, consumed, -1); | |
1474 | ||
1475 | ret = lttng_userspace_probe_location_lookup_method_create_from_payload( | |
1476 | &lookup_method_view, &lookup_method); | |
1477 | } | |
1ce46cfe JG |
1478 | if (ret < 0) { |
1479 | ret = -LTTNG_ERR_INVALID; | |
1480 | goto end; | |
1481 | } | |
1482 | ||
1483 | assert(lookup_method); | |
1484 | (*location)->lookup_method = lookup_method; | |
1485 | lookup_method = NULL; | |
1486 | ret += consumed; | |
1487 | end: | |
1488 | return ret; | |
1489 | } | |
1490 | ||
fe489250 | 1491 | static |
1ce46cfe | 1492 | int lttng_userspace_probe_location_function_set_binary_fd( |
fe489250 JG |
1493 | struct lttng_userspace_probe_location *location, |
1494 | struct fd_handle *binary_fd) | |
1ce46cfe JG |
1495 | { |
1496 | int ret = 0; | |
1497 | struct lttng_userspace_probe_location_function *function_location; | |
1498 | ||
1499 | assert(location); | |
1500 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); | |
1501 | ||
1502 | function_location = container_of(location, | |
1503 | struct lttng_userspace_probe_location_function, parent); | |
fe489250 JG |
1504 | fd_handle_put(function_location->binary_fd); |
1505 | fd_handle_get(binary_fd); | |
1ce46cfe | 1506 | function_location->binary_fd = binary_fd; |
1ce46cfe JG |
1507 | return ret; |
1508 | } | |
1509 | ||
fe489250 | 1510 | static |
f4d0bb2e | 1511 | int lttng_userspace_probe_location_tracepoint_set_binary_fd( |
fe489250 JG |
1512 | struct lttng_userspace_probe_location *location, |
1513 | struct fd_handle *binary_fd) | |
f4d0bb2e FD |
1514 | { |
1515 | int ret = 0; | |
1516 | struct lttng_userspace_probe_location_tracepoint *tracepoint_location; | |
1517 | ||
1518 | assert(location); | |
1519 | assert(location->type == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT); | |
1520 | ||
1521 | tracepoint_location = container_of(location, | |
1522 | struct lttng_userspace_probe_location_tracepoint, parent); | |
fe489250 JG |
1523 | fd_handle_put(tracepoint_location->binary_fd); |
1524 | fd_handle_get(binary_fd); | |
f4d0bb2e | 1525 | tracepoint_location->binary_fd = binary_fd; |
f4d0bb2e FD |
1526 | return ret; |
1527 | } | |
1528 | ||
1ce46cfe JG |
1529 | static |
1530 | int lttng_userspace_probe_location_function_flatten( | |
1531 | const struct lttng_userspace_probe_location *location, | |
1532 | struct lttng_dynamic_buffer *buffer) | |
1533 | { | |
1534 | struct lttng_userspace_probe_location_lookup_method_elf flat_lookup_method; | |
1535 | struct lttng_userspace_probe_location_function *probe_function; | |
1536 | struct lttng_userspace_probe_location_function flat_probe; | |
1537 | size_t function_name_len, binary_path_len; | |
1538 | size_t padding_needed = 0; | |
1539 | char *flat_probe_start; | |
1540 | int storage_needed = 0; | |
1541 | int ret; | |
1542 | ||
1543 | assert(location); | |
1544 | ||
1545 | if (location->lookup_method && location->lookup_method->type != | |
1546 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF) { | |
1547 | ret = -LTTNG_ERR_INVALID; | |
1548 | goto end; | |
1549 | } | |
1550 | ||
1551 | probe_function = container_of(location, | |
1552 | struct lttng_userspace_probe_location_function, | |
1553 | parent); | |
1554 | assert(probe_function->function_name); | |
1555 | assert(probe_function->binary_path); | |
1556 | ||
1557 | storage_needed += | |
1558 | sizeof(struct lttng_userspace_probe_location_function); | |
1559 | function_name_len = strlen(probe_function->function_name) + 1; | |
1560 | binary_path_len = strlen(probe_function->binary_path) + 1; | |
1561 | storage_needed += function_name_len + binary_path_len; | |
1562 | ||
1563 | /* | |
1564 | * The lookup method is aligned to 64-bit within the buffer. | |
1565 | * This is needed even if there is no lookup method since | |
1566 | * the next structure in the buffer probably needs to be | |
1567 | * aligned too (depending on the arch). | |
1568 | */ | |
1569 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1570 | storage_needed += padding_needed; | |
1571 | ||
1572 | if (location->lookup_method) { | |
1573 | /* NOTE: elf look-up method is assumed here. */ | |
1574 | storage_needed += sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1575 | } | |
1576 | ||
1577 | if (!buffer) { | |
1578 | ret = storage_needed; | |
1579 | goto end; | |
1580 | } | |
1581 | ||
1582 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1583 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1584 | buffer->size + storage_needed); | |
1585 | if (ret) { | |
1586 | goto end; | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1591 | ||
1592 | flat_probe_start = buffer->data + buffer->size; | |
1593 | flat_probe.parent.type = location->type; | |
1594 | /* | |
1595 | * The lookup method, if present, is the last element in the flat | |
1596 | * representation of the probe. | |
1597 | */ | |
1598 | if (location->lookup_method) { | |
1599 | flat_probe.parent.lookup_method = | |
1600 | (struct lttng_userspace_probe_location_lookup_method *) | |
1601 | (flat_probe_start + sizeof(flat_probe) + | |
1602 | function_name_len + binary_path_len + padding_needed); | |
1603 | } else { | |
1604 | flat_probe.parent.lookup_method = NULL; | |
1605 | } | |
1606 | ||
1607 | flat_probe.function_name = flat_probe_start + sizeof(flat_probe); | |
1608 | flat_probe.binary_path = flat_probe.function_name + function_name_len; | |
fe489250 | 1609 | flat_probe.binary_fd = NULL; |
1ce46cfe JG |
1610 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, |
1611 | sizeof(flat_probe)); | |
1612 | if (ret) { | |
1613 | goto end; | |
1614 | } | |
1615 | ||
1616 | ret = lttng_dynamic_buffer_append(buffer, | |
1617 | probe_function->function_name, function_name_len); | |
1618 | if (ret) { | |
1619 | goto end; | |
1620 | } | |
1621 | ret = lttng_dynamic_buffer_append(buffer, | |
1622 | probe_function->binary_path, binary_path_len); | |
1623 | if (ret) { | |
1624 | goto end; | |
1625 | } | |
1626 | ||
1627 | /* Insert padding before the lookup method. */ | |
1628 | ret = lttng_dynamic_buffer_set_size(buffer, | |
1629 | buffer->size + padding_needed); | |
1630 | if (ret) { | |
1631 | goto end; | |
1632 | } | |
1633 | ||
1634 | if (!location->lookup_method) { | |
1635 | /* Not an error, the default method is used. */ | |
1636 | ret = storage_needed; | |
1637 | goto end; | |
1638 | } | |
1639 | ||
1640 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1641 | flat_lookup_method.parent.type = | |
1642 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_FUNCTION_ELF; | |
1643 | ret = lttng_dynamic_buffer_append(buffer, | |
1644 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1645 | if (ret) { | |
1646 | goto end; | |
1647 | } | |
1648 | ret = storage_needed; | |
1649 | end: | |
1650 | return ret; | |
1651 | } | |
1652 | ||
f4d0bb2e FD |
1653 | static |
1654 | int lttng_userspace_probe_location_tracepoint_flatten( | |
1655 | const struct lttng_userspace_probe_location *location, | |
1656 | struct lttng_dynamic_buffer *buffer) | |
1657 | { | |
1658 | struct lttng_userspace_probe_location_lookup_method_sdt flat_lookup_method; | |
1659 | struct lttng_userspace_probe_location_tracepoint *probe_tracepoint; | |
1660 | struct lttng_userspace_probe_location_tracepoint flat_probe; | |
1661 | size_t probe_name_len, provider_name_len, binary_path_len; | |
1662 | size_t padding_needed = 0; | |
1663 | int storage_needed = 0; | |
1664 | char *flat_probe_start; | |
1665 | int ret = 0; | |
1666 | ||
1667 | assert(location); | |
1668 | ||
1669 | /* Only SDT tracepoints are supported at the moment */ | |
1670 | if (location->lookup_method && location->lookup_method->type != | |
1671 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT) { | |
1672 | ret = -LTTNG_ERR_INVALID; | |
1673 | goto end; | |
1674 | } | |
1675 | probe_tracepoint = container_of(location, | |
1676 | struct lttng_userspace_probe_location_tracepoint, | |
1677 | parent); | |
1678 | assert(probe_tracepoint->probe_name); | |
1679 | assert(probe_tracepoint->provider_name); | |
1680 | assert(probe_tracepoint->binary_path); | |
1681 | ||
1682 | /* Compute the storage space needed to flatten the probe location */ | |
1683 | storage_needed += sizeof(struct lttng_userspace_probe_location_tracepoint); | |
1684 | ||
1685 | probe_name_len = strlen(probe_tracepoint->probe_name) + 1; | |
1686 | provider_name_len = strlen(probe_tracepoint->provider_name) + 1; | |
1687 | binary_path_len = strlen(probe_tracepoint->binary_path) + 1; | |
1688 | ||
1689 | storage_needed += probe_name_len + provider_name_len + binary_path_len; | |
1690 | ||
1691 | /* | |
1692 | * The lookup method is aligned to 64-bit within the buffer. | |
1693 | * This is needed even if there is no lookup method since | |
1694 | * the next structure in the buffer probably needs to be | |
1695 | * aligned too (depending on the arch). | |
1696 | */ | |
1697 | padding_needed = ALIGN_TO(storage_needed, sizeof(uint64_t)) - storage_needed; | |
1698 | storage_needed += padding_needed; | |
1699 | ||
1700 | if (location->lookup_method) { | |
1701 | /* NOTE: elf look-up method is assumed here. */ | |
1702 | storage_needed += | |
1703 | sizeof(struct lttng_userspace_probe_location_lookup_method_elf); | |
1704 | } | |
1705 | ||
1706 | /* | |
1707 | * If the caller set buffer to NULL, return the size of the needed buffer. | |
1708 | */ | |
1709 | if (!buffer) { | |
1710 | ret = storage_needed; | |
1711 | goto end; | |
1712 | } | |
1713 | ||
1714 | if (lttng_dynamic_buffer_get_capacity_left(buffer) < storage_needed) { | |
1715 | ret = lttng_dynamic_buffer_set_capacity(buffer, | |
1716 | buffer->size + storage_needed); | |
1717 | if (ret) { | |
1718 | goto end; | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | memset(&flat_probe, 0, sizeof(flat_probe)); | |
1723 | ||
1724 | flat_probe_start = buffer->data + buffer->size; | |
1725 | flat_probe.parent.type = location->type; | |
1726 | ||
1727 | /* | |
1728 | * The lookup method, if present, is the last element in the flat | |
1729 | * representation of the probe. | |
1730 | */ | |
1731 | if (location->lookup_method) { | |
1732 | flat_probe.parent.lookup_method = | |
1733 | (struct lttng_userspace_probe_location_lookup_method *) | |
1734 | (flat_probe_start + sizeof(flat_probe) + | |
1735 | probe_name_len + provider_name_len + | |
1736 | binary_path_len + padding_needed); | |
1737 | } else { | |
1738 | flat_probe.parent.lookup_method = NULL; | |
1739 | } | |
1740 | ||
1741 | flat_probe.probe_name = flat_probe_start + sizeof(flat_probe); | |
1742 | flat_probe.provider_name = flat_probe.probe_name + probe_name_len; | |
1743 | flat_probe.binary_path = flat_probe.provider_name + provider_name_len; | |
fe489250 | 1744 | flat_probe.binary_fd = NULL; |
f4d0bb2e FD |
1745 | ret = lttng_dynamic_buffer_append(buffer, &flat_probe, sizeof(flat_probe)); |
1746 | if (ret) { | |
1747 | goto end; | |
1748 | } | |
1749 | ||
1750 | /* Append all the fields to the buffer */ | |
1751 | ret = lttng_dynamic_buffer_append(buffer, | |
1752 | probe_tracepoint->probe_name, probe_name_len); | |
1753 | if (ret) { | |
1754 | goto end; | |
1755 | } | |
1756 | ret = lttng_dynamic_buffer_append(buffer, | |
1757 | probe_tracepoint->provider_name, provider_name_len); | |
1758 | if (ret) { | |
1759 | goto end; | |
1760 | } | |
1761 | ret = lttng_dynamic_buffer_append(buffer, | |
1762 | probe_tracepoint->binary_path, binary_path_len); | |
1763 | if (ret) { | |
1764 | goto end; | |
1765 | } | |
1766 | ||
1767 | /* Insert padding before the lookup method. */ | |
1768 | ret = lttng_dynamic_buffer_set_size(buffer, buffer->size + padding_needed); | |
1769 | if (ret) { | |
1770 | goto end; | |
1771 | } | |
1772 | ||
1773 | if (!location->lookup_method) { | |
1774 | /* Not an error, the default method is used. */ | |
1775 | ret = storage_needed; | |
1776 | goto end; | |
1777 | } | |
1778 | ||
1779 | memset(&flat_lookup_method, 0, sizeof(flat_lookup_method)); | |
1780 | ||
1781 | flat_lookup_method.parent.type = | |
1782 | LTTNG_USERSPACE_PROBE_LOCATION_LOOKUP_METHOD_TYPE_TRACEPOINT_SDT; | |
1783 | ret = lttng_dynamic_buffer_append(buffer, | |
1784 | &flat_lookup_method, sizeof(flat_lookup_method)); | |
1785 | if (ret) { | |
1786 | goto end; | |
1787 | } | |
1788 | ret = storage_needed; | |
1789 | end: | |
1790 | return ret; | |
1791 | } | |
1792 | ||
1ce46cfe JG |
1793 | LTTNG_HIDDEN |
1794 | int lttng_userspace_probe_location_flatten( | |
1795 | const struct lttng_userspace_probe_location *location, | |
1796 | struct lttng_dynamic_buffer *buffer) | |
1797 | { | |
1798 | int ret; | |
1799 | if (!location) { | |
1800 | ret = -LTTNG_ERR_INVALID; | |
1801 | goto end; | |
1802 | } | |
1803 | ||
1804 | /* Only types currently supported. */ | |
1805 | switch (location->type) { | |
1806 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1807 | ret = lttng_userspace_probe_location_function_flatten(location, buffer); | |
1808 | break; | |
f4d0bb2e FD |
1809 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1810 | ret = lttng_userspace_probe_location_tracepoint_flatten(location, buffer); | |
1811 | break; | |
1ce46cfe JG |
1812 | default: |
1813 | ret = -LTTNG_ERR_INVALID; | |
1814 | goto end; | |
1815 | } | |
1816 | ||
1817 | end: | |
1818 | return ret; | |
1819 | } | |
394357fe FD |
1820 | |
1821 | LTTNG_HIDDEN | |
1822 | struct lttng_userspace_probe_location *lttng_userspace_probe_location_copy( | |
1823 | const struct lttng_userspace_probe_location *location) | |
1824 | { | |
1825 | struct lttng_userspace_probe_location *new_location = NULL; | |
1826 | enum lttng_userspace_probe_location_type type; | |
1827 | ||
1828 | if (!location) { | |
1829 | goto err; | |
1830 | } | |
1831 | ||
1832 | type = lttng_userspace_probe_location_get_type(location); | |
1833 | switch (type) { | |
1834 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION: | |
1835 | new_location = | |
1836 | lttng_userspace_probe_location_function_copy(location); | |
1837 | if (!new_location) { | |
1838 | goto err; | |
1839 | } | |
1840 | break; | |
f4d0bb2e FD |
1841 | case LTTNG_USERSPACE_PROBE_LOCATION_TYPE_TRACEPOINT: |
1842 | new_location = | |
1843 | lttng_userspace_probe_location_tracepoint_copy(location); | |
1844 | if (!new_location) { | |
1845 | goto err; | |
1846 | } | |
1847 | break; | |
394357fe FD |
1848 | default: |
1849 | new_location = NULL; | |
1850 | goto err; | |
1851 | } | |
1852 | err: | |
1853 | return new_location; | |
1854 | } | |
dfcfa983 JR |
1855 | |
1856 | LTTNG_HIDDEN | |
1857 | bool lttng_userspace_probe_location_lookup_method_is_equal( | |
1858 | const struct lttng_userspace_probe_location_lookup_method *a, | |
1859 | const struct lttng_userspace_probe_location_lookup_method *b) | |
1860 | { | |
1861 | bool is_equal = false; | |
1862 | ||
1863 | if (!a || !b) { | |
1864 | goto end; | |
1865 | } | |
1866 | ||
1867 | if (a == b) { | |
1868 | is_equal = true; | |
1869 | goto end; | |
1870 | } | |
1871 | ||
1872 | if (a->type != b->type) { | |
1873 | goto end; | |
1874 | } | |
1875 | ||
1876 | is_equal = true; | |
1877 | end: | |
1878 | return is_equal; | |
1879 | } | |
1880 | ||
1881 | LTTNG_HIDDEN | |
1882 | bool lttng_userspace_probe_location_is_equal( | |
1883 | const struct lttng_userspace_probe_location *a, | |
1884 | const struct lttng_userspace_probe_location *b) | |
1885 | { | |
1886 | bool is_equal = false; | |
1887 | ||
1888 | if (!a || !b) { | |
1889 | goto end; | |
1890 | } | |
1891 | ||
1892 | if (a == b) { | |
1893 | is_equal = true; | |
1894 | goto end; | |
1895 | } | |
1896 | ||
1897 | if (!lttng_userspace_probe_location_lookup_method_is_equal( | |
1898 | a->lookup_method, b->lookup_method)) { | |
1899 | goto end; | |
1900 | } | |
1901 | ||
1902 | if (a->type != b->type) { | |
1903 | goto end; | |
1904 | } | |
1905 | ||
1906 | is_equal = a->equal ? a->equal(a, b) : true; | |
1907 | end: | |
1908 | return is_equal; | |
1909 | } |