Commit | Line | Data |
---|---|---|
d0b96690 | 1 | /* |
d0b96690 DG |
2 | * Copyright (C) 2010-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
3 | * | |
ab5be9fa | 4 | * SPDX-License-Identifier: GPL-2.0-only |
d0b96690 | 5 | * |
d0b96690 DG |
6 | */ |
7 | ||
6c1c0768 | 8 | #define _LGPL_SOURCE |
d0b96690 DG |
9 | #include <stdint.h> |
10 | #include <string.h> | |
11 | #include <stdarg.h> | |
12 | #include <stdio.h> | |
13 | #include <limits.h> | |
14 | #include <unistd.h> | |
15 | #include <inttypes.h> | |
16 | #include <common/common.h> | |
395d6b02 | 17 | #include <common/time.h> |
d0b96690 DG |
18 | |
19 | #include "ust-registry.h" | |
20 | #include "ust-clock.h" | |
21 | #include "ust-app.h" | |
22 | ||
23 | #ifndef max_t | |
24 | #define max_t(type, a, b) ((type) ((a) > (b) ? (a) : (b))) | |
25 | #endif | |
26 | ||
8c645bb0 MD |
27 | #define NR_CLOCK_OFFSET_SAMPLES 10 |
28 | ||
29 | struct offset_sample { | |
c2636b57 | 30 | int64_t offset; /* correlation offset */ |
8c645bb0 MD |
31 | uint64_t measure_delta; /* lower is better */ |
32 | }; | |
33 | ||
da860cab MD |
34 | static |
35 | int _lttng_field_statedump(struct ust_registry_session *session, | |
b623cb6a | 36 | const struct lttng_ust_ctl_field *fields, size_t nr_fields, |
da860cab MD |
37 | size_t *iter_field, size_t nesting); |
38 | ||
d0b96690 DG |
39 | static inline |
40 | int get_count_order(unsigned int count) | |
41 | { | |
42 | int order; | |
43 | ||
78ddfe55 | 44 | order = lttng_fls(count) - 1; |
46b4dda6 | 45 | if (count & (count - 1)) { |
d0b96690 | 46 | order++; |
46b4dda6 JG |
47 | } |
48 | assert(order >= 0); | |
d0b96690 DG |
49 | return order; |
50 | } | |
51 | ||
52 | /* | |
53 | * Returns offset where to write in metadata array, or negative error value on error. | |
54 | */ | |
55 | static | |
56 | ssize_t metadata_reserve(struct ust_registry_session *session, size_t len) | |
57 | { | |
58 | size_t new_len = session->metadata_len + len; | |
59 | size_t new_alloc_len = new_len; | |
60 | size_t old_alloc_len = session->metadata_alloc_len; | |
61 | ssize_t ret; | |
62 | ||
63 | if (new_alloc_len > (UINT32_MAX >> 1)) | |
64 | return -EINVAL; | |
65 | if ((old_alloc_len << 1) > (UINT32_MAX >> 1)) | |
66 | return -EINVAL; | |
67 | ||
68 | if (new_alloc_len > old_alloc_len) { | |
69 | char *newptr; | |
70 | ||
71 | new_alloc_len = | |
72 | max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1); | |
73 | newptr = realloc(session->metadata, new_alloc_len); | |
74 | if (!newptr) | |
75 | return -ENOMEM; | |
76 | session->metadata = newptr; | |
77 | /* We zero directly the memory from start of allocation. */ | |
78 | memset(&session->metadata[old_alloc_len], 0, new_alloc_len - old_alloc_len); | |
79 | session->metadata_alloc_len = new_alloc_len; | |
80 | } | |
81 | ret = session->metadata_len; | |
82 | session->metadata_len += len; | |
83 | return ret; | |
84 | } | |
85 | ||
d7ba1388 MD |
86 | static |
87 | int metadata_file_append(struct ust_registry_session *session, | |
88 | const char *str, size_t len) | |
89 | { | |
90 | ssize_t written; | |
91 | ||
92 | if (session->metadata_fd < 0) { | |
93 | return 0; | |
94 | } | |
95 | /* Write to metadata file */ | |
96 | written = lttng_write(session->metadata_fd, str, len); | |
97 | if (written != len) { | |
98 | return -1; | |
99 | } | |
100 | return 0; | |
101 | } | |
102 | ||
d0b96690 DG |
103 | /* |
104 | * We have exclusive access to our metadata buffer (protected by the | |
105 | * ust_lock), so we can do racy operations such as looking for | |
106 | * remaining space left in packet and write, since mutual exclusion | |
107 | * protects us from concurrent writes. | |
108 | */ | |
109 | static | |
110 | int lttng_metadata_printf(struct ust_registry_session *session, | |
111 | const char *fmt, ...) | |
112 | { | |
113 | char *str = NULL; | |
114 | size_t len; | |
115 | va_list ap; | |
116 | ssize_t offset; | |
117 | int ret; | |
118 | ||
119 | va_start(ap, fmt); | |
120 | ret = vasprintf(&str, fmt, ap); | |
121 | va_end(ap); | |
122 | if (ret < 0) | |
123 | return -ENOMEM; | |
124 | ||
125 | len = strlen(str); | |
126 | offset = metadata_reserve(session, len); | |
127 | if (offset < 0) { | |
128 | ret = offset; | |
129 | goto end; | |
130 | } | |
131 | memcpy(&session->metadata[offset], str, len); | |
d7ba1388 MD |
132 | ret = metadata_file_append(session, str, len); |
133 | if (ret) { | |
134 | PERROR("Error appending to metadata file"); | |
135 | goto end; | |
136 | } | |
d0b96690 DG |
137 | DBG3("Append to metadata: \"%s\"", str); |
138 | ret = 0; | |
139 | ||
140 | end: | |
141 | free(str); | |
142 | return ret; | |
143 | } | |
144 | ||
da860cab MD |
145 | static |
146 | int print_tabs(struct ust_registry_session *session, size_t nesting) | |
147 | { | |
148 | size_t i; | |
149 | ||
150 | for (i = 0; i < nesting; i++) { | |
151 | int ret; | |
152 | ||
153 | ret = lttng_metadata_printf(session, " "); | |
154 | if (ret) { | |
155 | return ret; | |
156 | } | |
157 | } | |
158 | return 0; | |
159 | } | |
160 | ||
a1f68b22 MD |
161 | static |
162 | void sanitize_ctf_identifier(char *out, const char *in) | |
163 | { | |
164 | size_t i; | |
165 | ||
fc4b93fa | 166 | for (i = 0; i < LTTNG_UST_ABI_SYM_NAME_LEN; i++) { |
a1f68b22 MD |
167 | switch (in[i]) { |
168 | case '.': | |
169 | case '$': | |
170 | case ':': | |
171 | out[i] = '_'; | |
172 | break; | |
173 | default: | |
174 | out[i] = in[i]; | |
175 | } | |
176 | } | |
177 | } | |
178 | ||
8de88061 JR |
179 | static |
180 | int print_escaped_ctf_string(struct ust_registry_session *session, const char *string) | |
181 | { | |
35c829f8 | 182 | int ret = 0; |
8de88061 JR |
183 | size_t i; |
184 | char cur; | |
185 | ||
186 | i = 0; | |
187 | cur = string[i]; | |
188 | while (cur != '\0') { | |
189 | switch (cur) { | |
190 | case '\n': | |
191 | ret = lttng_metadata_printf(session, "%s", "\\n"); | |
192 | break; | |
193 | case '\\': | |
194 | case '"': | |
195 | ret = lttng_metadata_printf(session, "%c", '\\'); | |
196 | if (ret) { | |
197 | goto error; | |
198 | } | |
199 | /* We still print the current char */ | |
200 | /* Fallthrough */ | |
201 | default: | |
202 | ret = lttng_metadata_printf(session, "%c", cur); | |
203 | break; | |
204 | } | |
205 | ||
206 | if (ret) { | |
207 | goto error; | |
208 | } | |
209 | ||
210 | cur = string[++i]; | |
211 | } | |
212 | error: | |
213 | return ret; | |
214 | } | |
215 | ||
10b56aef MD |
216 | /* Called with session registry mutex held. */ |
217 | static | |
218 | int ust_metadata_enum_statedump(struct ust_registry_session *session, | |
219 | const char *enum_name, | |
220 | uint64_t enum_id, | |
b623cb6a | 221 | const struct lttng_ust_ctl_integer_type *container_type, |
da860cab | 222 | const char *field_name, size_t *iter_field, size_t nesting) |
10b56aef MD |
223 | { |
224 | struct ust_registry_enum *reg_enum; | |
b623cb6a | 225 | const struct lttng_ust_ctl_enum_entry *entries; |
10b56aef MD |
226 | size_t nr_entries; |
227 | int ret = 0; | |
228 | size_t i; | |
fc4b93fa | 229 | char identifier[LTTNG_UST_ABI_SYM_NAME_LEN]; |
10b56aef MD |
230 | |
231 | rcu_read_lock(); | |
232 | reg_enum = ust_registry_lookup_enum_by_id(session, enum_name, enum_id); | |
233 | rcu_read_unlock(); | |
234 | /* reg_enum can still be used because session registry mutex is held. */ | |
235 | if (!reg_enum) { | |
236 | ret = -ENOENT; | |
237 | goto end; | |
238 | } | |
239 | entries = reg_enum->entries; | |
240 | nr_entries = reg_enum->nr_entries; | |
241 | ||
da860cab MD |
242 | ret = print_tabs(session, nesting); |
243 | if (ret) { | |
244 | goto end; | |
245 | } | |
10b56aef | 246 | ret = lttng_metadata_printf(session, |
da860cab | 247 | "enum : integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u; } {\n", |
10b56aef MD |
248 | container_type->size, |
249 | container_type->alignment, | |
250 | container_type->signedness, | |
b623cb6a | 251 | (container_type->encoding == lttng_ust_ctl_encode_none) |
10b56aef | 252 | ? "none" |
b623cb6a | 253 | : (container_type->encoding == lttng_ust_ctl_encode_UTF8) |
10b56aef MD |
254 | ? "UTF8" |
255 | : "ASCII", | |
256 | container_type->base); | |
257 | if (ret) { | |
258 | goto end; | |
259 | } | |
1ddb0e8a | 260 | nesting++; |
10b56aef MD |
261 | /* Dump all entries */ |
262 | for (i = 0; i < nr_entries; i++) { | |
b623cb6a | 263 | const struct lttng_ust_ctl_enum_entry *entry = &entries[i]; |
10b56aef MD |
264 | int j, len; |
265 | ||
a1f68b22 MD |
266 | ret = print_tabs(session, nesting); |
267 | if (ret) { | |
268 | goto end; | |
269 | } | |
10b56aef | 270 | ret = lttng_metadata_printf(session, |
a1f68b22 | 271 | "\""); |
10b56aef MD |
272 | if (ret) { |
273 | goto end; | |
274 | } | |
275 | len = strlen(entry->string); | |
276 | /* Escape the character '"' */ | |
277 | for (j = 0; j < len; j++) { | |
278 | char c = entry->string[j]; | |
279 | ||
280 | switch (c) { | |
281 | case '"': | |
282 | ret = lttng_metadata_printf(session, | |
283 | "\\\""); | |
284 | break; | |
285 | case '\\': | |
286 | ret = lttng_metadata_printf(session, | |
287 | "\\\\"); | |
288 | break; | |
289 | default: | |
290 | ret = lttng_metadata_printf(session, | |
291 | "%c", c); | |
292 | break; | |
293 | } | |
294 | if (ret) { | |
295 | goto end; | |
296 | } | |
297 | } | |
e85e3723 | 298 | ret = lttng_metadata_printf(session, "\""); |
10b56aef MD |
299 | if (ret) { |
300 | goto end; | |
301 | } | |
3b016e58 | 302 | |
9d27cec7 | 303 | if (entry->u.extra.options & |
b623cb6a | 304 | LTTNG_UST_CTL_UST_ENUM_ENTRY_OPTION_IS_AUTO) { |
e85e3723 PP |
305 | ret = lttng_metadata_printf(session, ",\n"); |
306 | if (ret) { | |
307 | goto end; | |
308 | } | |
10b56aef MD |
309 | } else { |
310 | ret = lttng_metadata_printf(session, | |
e85e3723 PP |
311 | " = "); |
312 | if (ret) { | |
313 | goto end; | |
314 | } | |
3b016e58 | 315 | |
e85e3723 | 316 | if (entry->start.signedness) { |
3b016e58 | 317 | ret = lttng_metadata_printf(session, |
e85e3723 | 318 | "%lld", (long long) entry->start.value); |
3b016e58 MD |
319 | } else { |
320 | ret = lttng_metadata_printf(session, | |
e85e3723 PP |
321 | "%llu", entry->start.value); |
322 | } | |
323 | if (ret) { | |
324 | goto end; | |
325 | } | |
326 | ||
327 | if (entry->start.signedness == entry->end.signedness && | |
328 | entry->start.value == | |
329 | entry->end.value) { | |
330 | ret = lttng_metadata_printf(session, ",\n"); | |
331 | } else { | |
332 | if (entry->end.signedness) { | |
333 | ret = lttng_metadata_printf(session, | |
334 | " ... %lld,\n", | |
335 | (long long) entry->end.value); | |
336 | } else { | |
337 | ret = lttng_metadata_printf(session, | |
338 | " ... %llu,\n", | |
339 | entry->end.value); | |
340 | } | |
341 | } | |
342 | if (ret) { | |
343 | goto end; | |
3b016e58 | 344 | } |
10b56aef MD |
345 | } |
346 | } | |
1ddb0e8a | 347 | nesting--; |
a1f68b22 MD |
348 | sanitize_ctf_identifier(identifier, field_name); |
349 | ret = print_tabs(session, nesting); | |
350 | if (ret) { | |
351 | goto end; | |
352 | } | |
353 | ret = lttng_metadata_printf(session, "} _%s;\n", | |
354 | identifier); | |
da860cab MD |
355 | end: |
356 | (*iter_field)++; | |
357 | return ret; | |
358 | } | |
359 | ||
da860cab MD |
360 | static |
361 | int _lttng_variant_statedump(struct ust_registry_session *session, | |
0d32d1a9 MD |
362 | uint32_t nr_choices, const char *tag_name, |
363 | uint32_t alignment, | |
b623cb6a | 364 | const struct lttng_ust_ctl_field *fields, size_t nr_fields, |
da860cab MD |
365 | size_t *iter_field, size_t nesting) |
366 | { | |
b623cb6a | 367 | const struct lttng_ust_ctl_field *variant = &fields[*iter_field]; |
0d32d1a9 | 368 | uint32_t i; |
da860cab | 369 | int ret; |
fc4b93fa | 370 | char identifier[LTTNG_UST_ABI_SYM_NAME_LEN]; |
da860cab | 371 | |
da860cab | 372 | (*iter_field)++; |
0d32d1a9 MD |
373 | sanitize_ctf_identifier(identifier, tag_name); |
374 | if (alignment) { | |
375 | ret = print_tabs(session, nesting); | |
376 | if (ret) { | |
377 | goto end; | |
378 | } | |
379 | ret = lttng_metadata_printf(session, | |
380 | "struct { } align(%u) _%s_padding;\n", | |
381 | alignment * CHAR_BIT, | |
382 | variant->name); | |
383 | if (ret) { | |
384 | goto end; | |
385 | } | |
386 | } | |
a1f68b22 MD |
387 | ret = print_tabs(session, nesting); |
388 | if (ret) { | |
389 | goto end; | |
390 | } | |
da860cab | 391 | ret = lttng_metadata_printf(session, |
a1f68b22 MD |
392 | "variant <_%s> {\n", |
393 | identifier); | |
da860cab MD |
394 | if (ret) { |
395 | goto end; | |
396 | } | |
397 | ||
398 | for (i = 0; i < nr_choices; i++) { | |
399 | if (*iter_field >= nr_fields) { | |
400 | ret = -EOVERFLOW; | |
401 | goto end; | |
402 | } | |
403 | ret = _lttng_field_statedump(session, | |
404 | fields, nr_fields, | |
405 | iter_field, nesting + 1); | |
dc6403f3 JG |
406 | if (ret) { |
407 | goto end; | |
408 | } | |
da860cab | 409 | } |
a1f68b22 MD |
410 | sanitize_ctf_identifier(identifier, variant->name); |
411 | ret = print_tabs(session, nesting); | |
850c5d4a JR |
412 | if (ret) { |
413 | goto end; | |
414 | } | |
da860cab | 415 | ret = lttng_metadata_printf(session, |
a1f68b22 MD |
416 | "} _%s;\n", |
417 | identifier); | |
da860cab MD |
418 | if (ret) { |
419 | goto end; | |
420 | } | |
10b56aef MD |
421 | end: |
422 | return ret; | |
423 | } | |
424 | ||
d0b96690 DG |
425 | static |
426 | int _lttng_field_statedump(struct ust_registry_session *session, | |
b623cb6a | 427 | const struct lttng_ust_ctl_field *fields, size_t nr_fields, |
da860cab | 428 | size_t *iter_field, size_t nesting) |
d0b96690 DG |
429 | { |
430 | int ret = 0; | |
431 | const char *bo_be = " byte_order = be;"; | |
432 | const char *bo_le = " byte_order = le;"; | |
433 | const char *bo_native = ""; | |
434 | const char *bo_reverse; | |
b623cb6a | 435 | const struct lttng_ust_ctl_field *field; |
d0b96690 | 436 | |
da860cab MD |
437 | if (*iter_field >= nr_fields) { |
438 | ret = -EOVERFLOW; | |
439 | goto end; | |
440 | } | |
441 | field = &fields[*iter_field]; | |
442 | ||
443 | if (session->byte_order == BIG_ENDIAN) { | |
d0b96690 | 444 | bo_reverse = bo_le; |
da860cab | 445 | } else { |
d0b96690 | 446 | bo_reverse = bo_be; |
da860cab | 447 | } |
d0b96690 DG |
448 | |
449 | switch (field->type.atype) { | |
b623cb6a | 450 | case lttng_ust_ctl_atype_integer: |
da860cab MD |
451 | ret = print_tabs(session, nesting); |
452 | if (ret) { | |
453 | goto end; | |
454 | } | |
d0b96690 | 455 | ret = lttng_metadata_printf(session, |
da860cab | 456 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s;\n", |
0d32d1a9 MD |
457 | field->type.u.integer.size, |
458 | field->type.u.integer.alignment, | |
459 | field->type.u.integer.signedness, | |
b623cb6a | 460 | (field->type.u.integer.encoding == lttng_ust_ctl_encode_none) |
d0b96690 | 461 | ? "none" |
b623cb6a | 462 | : (field->type.u.integer.encoding == lttng_ust_ctl_encode_UTF8) |
d0b96690 DG |
463 | ? "UTF8" |
464 | : "ASCII", | |
0d32d1a9 MD |
465 | field->type.u.integer.base, |
466 | field->type.u.integer.reverse_byte_order ? bo_reverse : bo_native, | |
d0b96690 | 467 | field->name); |
da860cab | 468 | (*iter_field)++; |
d0b96690 | 469 | break; |
b623cb6a | 470 | case lttng_ust_ctl_atype_enum: |
10b56aef | 471 | ret = ust_metadata_enum_statedump(session, |
0d32d1a9 MD |
472 | field->type.u.legacy.basic.enumeration.name, |
473 | field->type.u.legacy.basic.enumeration.id, | |
474 | &field->type.u.legacy.basic.enumeration.container_type, | |
da860cab | 475 | field->name, iter_field, nesting); |
10b56aef | 476 | break; |
b623cb6a | 477 | case lttng_ust_ctl_atype_float: |
da860cab MD |
478 | ret = print_tabs(session, nesting); |
479 | if (ret) { | |
480 | goto end; | |
481 | } | |
d0b96690 | 482 | ret = lttng_metadata_printf(session, |
da860cab | 483 | "floating_point { exp_dig = %u; mant_dig = %u; align = %u;%s } _%s;\n", |
0d32d1a9 MD |
484 | field->type.u._float.exp_dig, |
485 | field->type.u._float.mant_dig, | |
486 | field->type.u._float.alignment, | |
487 | field->type.u._float.reverse_byte_order ? bo_reverse : bo_native, | |
d0b96690 | 488 | field->name); |
da860cab | 489 | (*iter_field)++; |
d0b96690 | 490 | break; |
b623cb6a | 491 | case lttng_ust_ctl_atype_array: |
d0b96690 | 492 | { |
b623cb6a | 493 | const struct lttng_ust_ctl_basic_type *elem_type; |
d0b96690 | 494 | |
da860cab MD |
495 | ret = print_tabs(session, nesting); |
496 | if (ret) { | |
497 | goto end; | |
498 | } | |
0d32d1a9 MD |
499 | elem_type = &field->type.u.legacy.array.elem_type; |
500 | /* Only integers are currently supported in arrays. */ | |
b623cb6a | 501 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
0d32d1a9 MD |
502 | ret = -EINVAL; |
503 | goto end; | |
504 | } | |
d0b96690 | 505 | ret = lttng_metadata_printf(session, |
da860cab | 506 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n", |
d0b96690 DG |
507 | elem_type->u.basic.integer.size, |
508 | elem_type->u.basic.integer.alignment, | |
509 | elem_type->u.basic.integer.signedness, | |
b623cb6a | 510 | (elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_none) |
d0b96690 | 511 | ? "none" |
b623cb6a | 512 | : (elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_UTF8) |
d0b96690 DG |
513 | ? "UTF8" |
514 | : "ASCII", | |
515 | elem_type->u.basic.integer.base, | |
516 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
0d32d1a9 MD |
517 | field->name, field->type.u.legacy.array.length); |
518 | (*iter_field)++; | |
519 | break; | |
520 | } | |
b623cb6a | 521 | case lttng_ust_ctl_atype_array_nestable: |
0d32d1a9 MD |
522 | { |
523 | uint32_t array_length; | |
b623cb6a MJ |
524 | const struct lttng_ust_ctl_field *array_nestable; |
525 | const struct lttng_ust_ctl_type *elem_type; | |
0d32d1a9 MD |
526 | |
527 | array_length = field->type.u.array_nestable.length; | |
528 | (*iter_field)++; | |
529 | ||
530 | if (*iter_field >= nr_fields) { | |
531 | ret = -EOVERFLOW; | |
532 | goto end; | |
533 | } | |
534 | array_nestable = &fields[*iter_field]; | |
535 | elem_type = &array_nestable->type; | |
536 | ||
537 | /* Only integers are currently supported in arrays. */ | |
b623cb6a | 538 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
0d32d1a9 MD |
539 | ret = -EINVAL; |
540 | goto end; | |
541 | } | |
542 | ||
543 | if (field->type.u.array_nestable.alignment) { | |
544 | ret = print_tabs(session, nesting); | |
545 | if (ret) { | |
546 | goto end; | |
547 | } | |
548 | ret = lttng_metadata_printf(session, | |
549 | "struct { } align(%u) _%s_padding;\n", | |
550 | field->type.u.array_nestable.alignment * CHAR_BIT, | |
551 | field->name); | |
552 | if (ret) { | |
553 | goto end; | |
554 | } | |
555 | } | |
556 | ||
557 | ret = print_tabs(session, nesting); | |
558 | if (ret) { | |
559 | goto end; | |
560 | } | |
561 | ret = lttng_metadata_printf(session, | |
562 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[%u];\n", | |
563 | elem_type->u.integer.size, | |
564 | elem_type->u.integer.alignment, | |
565 | elem_type->u.integer.signedness, | |
b623cb6a | 566 | (elem_type->u.integer.encoding == lttng_ust_ctl_encode_none) |
0d32d1a9 | 567 | ? "none" |
b623cb6a | 568 | : (elem_type->u.integer.encoding == lttng_ust_ctl_encode_UTF8) |
0d32d1a9 MD |
569 | ? "UTF8" |
570 | : "ASCII", | |
571 | elem_type->u.integer.base, | |
572 | elem_type->u.integer.reverse_byte_order ? bo_reverse : bo_native, | |
573 | field->name, array_length); | |
da860cab | 574 | (*iter_field)++; |
d0b96690 DG |
575 | break; |
576 | } | |
b623cb6a | 577 | case lttng_ust_ctl_atype_sequence: |
d0b96690 | 578 | { |
b623cb6a MJ |
579 | const struct lttng_ust_ctl_basic_type *elem_type; |
580 | const struct lttng_ust_ctl_basic_type *length_type; | |
d0b96690 | 581 | |
0d32d1a9 MD |
582 | elem_type = &field->type.u.legacy.sequence.elem_type; |
583 | length_type = &field->type.u.legacy.sequence.length_type; | |
da860cab MD |
584 | ret = print_tabs(session, nesting); |
585 | if (ret) { | |
586 | goto end; | |
587 | } | |
0d32d1a9 MD |
588 | |
589 | /* Only integers are currently supported in sequences. */ | |
b623cb6a | 590 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
0d32d1a9 MD |
591 | ret = -EINVAL; |
592 | goto end; | |
593 | } | |
594 | ||
d0b96690 | 595 | ret = lttng_metadata_printf(session, |
da860cab | 596 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } __%s_length;\n", |
d0b96690 DG |
597 | length_type->u.basic.integer.size, |
598 | (unsigned int) length_type->u.basic.integer.alignment, | |
599 | length_type->u.basic.integer.signedness, | |
b623cb6a | 600 | (length_type->u.basic.integer.encoding == lttng_ust_ctl_encode_none) |
d0b96690 | 601 | ? "none" |
b623cb6a | 602 | : ((length_type->u.basic.integer.encoding == lttng_ust_ctl_encode_UTF8) |
d0b96690 DG |
603 | ? "UTF8" |
604 | : "ASCII"), | |
605 | length_type->u.basic.integer.base, | |
606 | length_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
607 | field->name); | |
da860cab MD |
608 | if (ret) { |
609 | goto end; | |
610 | } | |
d0b96690 | 611 | |
da860cab MD |
612 | ret = print_tabs(session, nesting); |
613 | if (ret) { | |
614 | goto end; | |
615 | } | |
d0b96690 | 616 | ret = lttng_metadata_printf(session, |
da860cab | 617 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ __%s_length ];\n", |
d0b96690 DG |
618 | elem_type->u.basic.integer.size, |
619 | (unsigned int) elem_type->u.basic.integer.alignment, | |
620 | elem_type->u.basic.integer.signedness, | |
b623cb6a | 621 | (elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_none) |
d0b96690 | 622 | ? "none" |
b623cb6a | 623 | : ((elem_type->u.basic.integer.encoding == lttng_ust_ctl_encode_UTF8) |
d0b96690 DG |
624 | ? "UTF8" |
625 | : "ASCII"), | |
626 | elem_type->u.basic.integer.base, | |
627 | elem_type->u.basic.integer.reverse_byte_order ? bo_reverse : bo_native, | |
628 | field->name, | |
629 | field->name); | |
da860cab | 630 | (*iter_field)++; |
d0b96690 DG |
631 | break; |
632 | } | |
b623cb6a | 633 | case lttng_ust_ctl_atype_sequence_nestable: |
0d32d1a9 | 634 | { |
b623cb6a MJ |
635 | const struct lttng_ust_ctl_field *sequence_nestable; |
636 | const struct lttng_ust_ctl_type *elem_type; | |
0d32d1a9 MD |
637 | |
638 | (*iter_field)++; | |
639 | if (*iter_field >= nr_fields) { | |
640 | ret = -EOVERFLOW; | |
641 | goto end; | |
642 | } | |
643 | sequence_nestable = &fields[*iter_field]; | |
644 | elem_type = &sequence_nestable->type; | |
645 | ||
646 | /* Only integers are currently supported in sequences. */ | |
b623cb6a | 647 | if (elem_type->atype != lttng_ust_ctl_atype_integer) { |
0d32d1a9 MD |
648 | ret = -EINVAL; |
649 | goto end; | |
650 | } | |
651 | ||
652 | if (field->type.u.sequence_nestable.alignment) { | |
653 | ret = print_tabs(session, nesting); | |
654 | if (ret) { | |
655 | goto end; | |
656 | } | |
657 | ret = lttng_metadata_printf(session, | |
658 | "struct { } align(%u) _%s_padding;\n", | |
659 | field->type.u.sequence_nestable.alignment * CHAR_BIT, | |
660 | field->name); | |
661 | if (ret) { | |
662 | goto end; | |
663 | } | |
664 | } | |
d0b96690 | 665 | |
0d32d1a9 MD |
666 | ret = print_tabs(session, nesting); |
667 | if (ret) { | |
668 | goto end; | |
669 | } | |
670 | ret = lttng_metadata_printf(session, | |
671 | "integer { size = %u; align = %u; signed = %u; encoding = %s; base = %u;%s } _%s[ _%s ];\n", | |
672 | elem_type->u.integer.size, | |
673 | (unsigned int) elem_type->u.integer.alignment, | |
674 | elem_type->u.integer.signedness, | |
b623cb6a | 675 | (elem_type->u.integer.encoding == lttng_ust_ctl_encode_none) |
0d32d1a9 | 676 | ? "none" |
b623cb6a | 677 | : ((elem_type->u.integer.encoding == lttng_ust_ctl_encode_UTF8) |
0d32d1a9 MD |
678 | ? "UTF8" |
679 | : "ASCII"), | |
680 | elem_type->u.integer.base, | |
681 | elem_type->u.integer.reverse_byte_order ? bo_reverse : bo_native, | |
682 | field->name, | |
683 | field->type.u.sequence_nestable.length_name); | |
684 | (*iter_field)++; | |
685 | break; | |
686 | } | |
b623cb6a | 687 | case lttng_ust_ctl_atype_string: |
d0b96690 | 688 | /* Default encoding is UTF8 */ |
da860cab MD |
689 | ret = print_tabs(session, nesting); |
690 | if (ret) { | |
691 | goto end; | |
692 | } | |
d0b96690 | 693 | ret = lttng_metadata_printf(session, |
da860cab | 694 | "string%s _%s;\n", |
b623cb6a | 695 | field->type.u.string.encoding == lttng_ust_ctl_encode_ASCII ? |
d0b96690 DG |
696 | " { encoding = ASCII; }" : "", |
697 | field->name); | |
da860cab MD |
698 | (*iter_field)++; |
699 | break; | |
b623cb6a | 700 | case lttng_ust_ctl_atype_variant: |
0d32d1a9 MD |
701 | ret = _lttng_variant_statedump(session, |
702 | field->type.u.legacy.variant.nr_choices, | |
703 | field->type.u.legacy.variant.tag_name, | |
704 | 0, | |
705 | fields, nr_fields, iter_field, nesting); | |
706 | if (ret) { | |
707 | goto end; | |
708 | } | |
709 | break; | |
b623cb6a | 710 | case lttng_ust_ctl_atype_variant_nestable: |
0d32d1a9 MD |
711 | ret = _lttng_variant_statedump(session, |
712 | field->type.u.variant_nestable.nr_choices, | |
713 | field->type.u.variant_nestable.tag_name, | |
714 | field->type.u.variant_nestable.alignment, | |
715 | fields, nr_fields, iter_field, nesting); | |
da860cab MD |
716 | if (ret) { |
717 | goto end; | |
718 | } | |
719 | break; | |
b623cb6a | 720 | case lttng_ust_ctl_atype_struct: |
0d32d1a9 MD |
721 | if (field->type.u.legacy._struct.nr_fields != 0) { |
722 | /* Currently only 0-length structures are supported. */ | |
723 | ret = -EINVAL; | |
724 | goto end; | |
725 | } | |
da860cab MD |
726 | ret = print_tabs(session, nesting); |
727 | if (ret) { | |
728 | goto end; | |
729 | } | |
730 | ret = lttng_metadata_printf(session, | |
731 | "struct {} _%s;\n", | |
732 | field->name); | |
733 | (*iter_field)++; | |
d0b96690 | 734 | break; |
b623cb6a | 735 | case lttng_ust_ctl_atype_struct_nestable: |
0d32d1a9 MD |
736 | if (field->type.u.struct_nestable.nr_fields != 0) { |
737 | /* Currently only 0-length structures are supported. */ | |
738 | ret = -EINVAL; | |
739 | goto end; | |
740 | } | |
741 | ret = print_tabs(session, nesting); | |
742 | if (ret) { | |
743 | goto end; | |
744 | } | |
745 | if (field->type.u.struct_nestable.alignment) { | |
746 | ret = lttng_metadata_printf(session, | |
747 | "struct {} align(%u) _%s;\n", | |
748 | field->type.u.struct_nestable.alignment * CHAR_BIT, | |
749 | field->name); | |
750 | if (ret) { | |
751 | goto end; | |
752 | } | |
753 | } else { | |
754 | ret = lttng_metadata_printf(session, | |
755 | "struct {} _%s;\n", | |
756 | field->name); | |
757 | } | |
758 | (*iter_field)++; | |
759 | break; | |
b623cb6a | 760 | case lttng_ust_ctl_atype_enum_nestable: |
0d32d1a9 | 761 | { |
b623cb6a MJ |
762 | const struct lttng_ust_ctl_field *container_field; |
763 | const struct lttng_ust_ctl_type *container_type; | |
0d32d1a9 MD |
764 | |
765 | (*iter_field)++; | |
766 | if (*iter_field >= nr_fields) { | |
767 | ret = -EOVERFLOW; | |
768 | goto end; | |
769 | } | |
770 | container_field = &fields[*iter_field]; | |
771 | container_type = &container_field->type; | |
772 | ||
773 | /* Only integers are supported as container types. */ | |
b623cb6a | 774 | if (container_type->atype != lttng_ust_ctl_atype_integer) { |
0d32d1a9 MD |
775 | ret = -EINVAL; |
776 | goto end; | |
777 | } | |
778 | ret = ust_metadata_enum_statedump(session, | |
779 | field->type.u.enum_nestable.name, | |
780 | field->type.u.enum_nestable.id, | |
781 | &container_type->u.integer, | |
782 | field->name, iter_field, nesting); | |
783 | break; | |
784 | } | |
d0b96690 | 785 | default: |
da860cab | 786 | ret = -EINVAL; |
d0b96690 | 787 | } |
da860cab | 788 | end: |
d0b96690 DG |
789 | return ret; |
790 | } | |
791 | ||
792 | static | |
793 | int _lttng_context_metadata_statedump(struct ust_registry_session *session, | |
794 | size_t nr_ctx_fields, | |
b623cb6a | 795 | struct lttng_ust_ctl_field *ctx) |
d0b96690 DG |
796 | { |
797 | int ret = 0; | |
da860cab | 798 | size_t i = 0; |
d0b96690 DG |
799 | |
800 | if (!ctx) | |
801 | return 0; | |
da860cab MD |
802 | for (;;) { |
803 | if (i >= nr_ctx_fields) { | |
804 | break; | |
805 | } | |
806 | ret = _lttng_field_statedump(session, ctx, | |
807 | nr_ctx_fields, &i, 2); | |
808 | if (ret) { | |
809 | break; | |
810 | } | |
d0b96690 DG |
811 | } |
812 | return ret; | |
813 | } | |
814 | ||
815 | static | |
816 | int _lttng_fields_metadata_statedump(struct ust_registry_session *session, | |
817 | struct ust_registry_event *event) | |
818 | { | |
819 | int ret = 0; | |
da860cab | 820 | size_t i = 0; |
d0b96690 | 821 | |
da860cab MD |
822 | for (;;) { |
823 | if (i >= event->nr_fields) { | |
824 | break; | |
825 | } | |
826 | ret = _lttng_field_statedump(session, event->fields, | |
827 | event->nr_fields, &i, 2); | |
828 | if (ret) { | |
829 | break; | |
830 | } | |
d0b96690 DG |
831 | } |
832 | return ret; | |
833 | } | |
834 | ||
835 | /* | |
836 | * Should be called with session registry mutex held. | |
837 | */ | |
838 | int ust_metadata_event_statedump(struct ust_registry_session *session, | |
839 | struct ust_registry_channel *chan, | |
840 | struct ust_registry_event *event) | |
841 | { | |
842 | int ret = 0; | |
843 | ||
844 | /* Don't dump metadata events */ | |
845 | if (chan->chan_id == -1U) | |
846 | return 0; | |
847 | ||
848 | ret = lttng_metadata_printf(session, | |
849 | "event {\n" | |
850 | " name = \"%s\";\n" | |
851 | " id = %u;\n" | |
852 | " stream_id = %u;\n", | |
853 | event->name, | |
854 | event->id, | |
855 | chan->chan_id); | |
0d32d1a9 | 856 | if (ret) { |
d0b96690 | 857 | goto end; |
0d32d1a9 | 858 | } |
d0b96690 DG |
859 | |
860 | ret = lttng_metadata_printf(session, | |
861 | " loglevel = %d;\n", | |
2106efa0 | 862 | event->loglevel_value); |
0d32d1a9 | 863 | if (ret) { |
d0b96690 | 864 | goto end; |
0d32d1a9 | 865 | } |
d0b96690 DG |
866 | |
867 | if (event->model_emf_uri) { | |
868 | ret = lttng_metadata_printf(session, | |
869 | " model.emf.uri = \"%s\";\n", | |
870 | event->model_emf_uri); | |
0d32d1a9 | 871 | if (ret) { |
d0b96690 | 872 | goto end; |
0d32d1a9 | 873 | } |
d0b96690 DG |
874 | } |
875 | ||
d0b96690 DG |
876 | ret = lttng_metadata_printf(session, |
877 | " fields := struct {\n" | |
878 | ); | |
0d32d1a9 | 879 | if (ret) { |
d0b96690 | 880 | goto end; |
0d32d1a9 | 881 | } |
d0b96690 DG |
882 | |
883 | ret = _lttng_fields_metadata_statedump(session, event); | |
0d32d1a9 | 884 | if (ret) { |
d0b96690 | 885 | goto end; |
0d32d1a9 | 886 | } |
d0b96690 DG |
887 | |
888 | ret = lttng_metadata_printf(session, | |
889 | " };\n" | |
890 | "};\n\n"); | |
0d32d1a9 | 891 | if (ret) { |
d0b96690 | 892 | goto end; |
0d32d1a9 | 893 | } |
7972aab2 | 894 | event->metadata_dumped = 1; |
d0b96690 DG |
895 | |
896 | end: | |
897 | return ret; | |
898 | } | |
899 | ||
900 | /* | |
901 | * Should be called with session registry mutex held. | |
902 | */ | |
903 | int ust_metadata_channel_statedump(struct ust_registry_session *session, | |
904 | struct ust_registry_channel *chan) | |
905 | { | |
906 | int ret = 0; | |
907 | ||
908 | /* Don't dump metadata events */ | |
909 | if (chan->chan_id == -1U) | |
910 | return 0; | |
911 | ||
912 | if (!chan->header_type) | |
913 | return -EINVAL; | |
914 | ||
915 | ret = lttng_metadata_printf(session, | |
916 | "stream {\n" | |
917 | " id = %u;\n" | |
918 | " event.header := %s;\n" | |
919 | " packet.context := struct packet_context;\n", | |
920 | chan->chan_id, | |
b623cb6a | 921 | chan->header_type == LTTNG_UST_CTL_CHANNEL_HEADER_COMPACT ? |
d0b96690 DG |
922 | "struct event_header_compact" : |
923 | "struct event_header_large"); | |
0d32d1a9 | 924 | if (ret) { |
d0b96690 | 925 | goto end; |
0d32d1a9 | 926 | } |
d0b96690 DG |
927 | |
928 | if (chan->ctx_fields) { | |
929 | ret = lttng_metadata_printf(session, | |
930 | " event.context := struct {\n"); | |
0d32d1a9 | 931 | if (ret) { |
d0b96690 | 932 | goto end; |
0d32d1a9 | 933 | } |
d0b96690 DG |
934 | } |
935 | ret = _lttng_context_metadata_statedump(session, | |
936 | chan->nr_ctx_fields, | |
937 | chan->ctx_fields); | |
0d32d1a9 | 938 | if (ret) { |
d0b96690 | 939 | goto end; |
0d32d1a9 | 940 | } |
d0b96690 DG |
941 | if (chan->ctx_fields) { |
942 | ret = lttng_metadata_printf(session, | |
943 | " };\n"); | |
0d32d1a9 | 944 | if (ret) { |
d0b96690 | 945 | goto end; |
0d32d1a9 | 946 | } |
d0b96690 DG |
947 | } |
948 | ||
949 | ret = lttng_metadata_printf(session, | |
950 | "};\n\n"); | |
7972aab2 DG |
951 | /* Flag success of metadata dump. */ |
952 | chan->metadata_dumped = 1; | |
d0b96690 DG |
953 | |
954 | end: | |
955 | return ret; | |
956 | } | |
957 | ||
958 | static | |
959 | int _lttng_stream_packet_context_declare(struct ust_registry_session *session) | |
960 | { | |
961 | return lttng_metadata_printf(session, | |
962 | "struct packet_context {\n" | |
963 | " uint64_clock_monotonic_t timestamp_begin;\n" | |
964 | " uint64_clock_monotonic_t timestamp_end;\n" | |
965 | " uint64_t content_size;\n" | |
966 | " uint64_t packet_size;\n" | |
0793bcc6 | 967 | " uint64_t packet_seq_num;\n" |
d0b96690 DG |
968 | " unsigned long events_discarded;\n" |
969 | " uint32_t cpu_id;\n" | |
970 | "};\n\n" | |
971 | ); | |
972 | } | |
973 | ||
974 | /* | |
975 | * Compact header: | |
976 | * id: range: 0 - 30. | |
977 | * id 31 is reserved to indicate an extended header. | |
978 | * | |
979 | * Large header: | |
980 | * id: range: 0 - 65534. | |
981 | * id 65535 is reserved to indicate an extended header. | |
982 | */ | |
983 | static | |
984 | int _lttng_event_header_declare(struct ust_registry_session *session) | |
985 | { | |
986 | return lttng_metadata_printf(session, | |
987 | "struct event_header_compact {\n" | |
988 | " enum : uint5_t { compact = 0 ... 30, extended = 31 } id;\n" | |
989 | " variant <id> {\n" | |
990 | " struct {\n" | |
991 | " uint27_clock_monotonic_t timestamp;\n" | |
992 | " } compact;\n" | |
993 | " struct {\n" | |
994 | " uint32_t id;\n" | |
995 | " uint64_clock_monotonic_t timestamp;\n" | |
996 | " } extended;\n" | |
997 | " } v;\n" | |
998 | "} align(%u);\n" | |
999 | "\n" | |
1000 | "struct event_header_large {\n" | |
1001 | " enum : uint16_t { compact = 0 ... 65534, extended = 65535 } id;\n" | |
1002 | " variant <id> {\n" | |
1003 | " struct {\n" | |
1004 | " uint32_clock_monotonic_t timestamp;\n" | |
1005 | " } compact;\n" | |
1006 | " struct {\n" | |
1007 | " uint32_t id;\n" | |
1008 | " uint64_clock_monotonic_t timestamp;\n" | |
1009 | " } extended;\n" | |
1010 | " } v;\n" | |
1011 | "} align(%u);\n\n", | |
1012 | session->uint32_t_alignment, | |
1013 | session->uint16_t_alignment | |
1014 | ); | |
1015 | } | |
1016 | ||
dc113ec7 MD |
1017 | /* |
1018 | * The offset between monotonic and realtime clock can be negative if | |
1019 | * the system sets the REALTIME clock to 0 after boot. | |
dc113ec7 | 1020 | */ |
d0b96690 | 1021 | static |
8c645bb0 | 1022 | int measure_single_clock_offset(struct offset_sample *sample) |
d0b96690 | 1023 | { |
dc113ec7 | 1024 | uint64_t monotonic_avg, monotonic[2], measure_delta, realtime; |
fc0bb9fa | 1025 | uint64_t tcf = trace_clock_freq(); |
d0b96690 DG |
1026 | struct timespec rts = { 0, 0 }; |
1027 | int ret; | |
1028 | ||
1029 | monotonic[0] = trace_clock_read64(); | |
389fbf04 | 1030 | ret = lttng_clock_gettime(CLOCK_REALTIME, &rts); |
8c645bb0 MD |
1031 | if (ret < 0) { |
1032 | return ret; | |
1033 | } | |
d0b96690 | 1034 | monotonic[1] = trace_clock_read64(); |
8c645bb0 MD |
1035 | measure_delta = monotonic[1] - monotonic[0]; |
1036 | if (measure_delta > sample->measure_delta) { | |
1037 | /* | |
1038 | * Discard value if it took longer to read than the best | |
1039 | * sample so far. | |
1040 | */ | |
1041 | return 0; | |
1042 | } | |
dc113ec7 | 1043 | monotonic_avg = (monotonic[0] + monotonic[1]) >> 1; |
6e1b0543 MD |
1044 | realtime = (uint64_t) rts.tv_sec * tcf; |
1045 | if (tcf == NSEC_PER_SEC) { | |
1046 | realtime += rts.tv_nsec; | |
1047 | } else { | |
1048 | realtime += (uint64_t) rts.tv_nsec * tcf / NSEC_PER_SEC; | |
fc0bb9fa | 1049 | } |
c2636b57 | 1050 | sample->offset = (int64_t) realtime - monotonic_avg; |
8c645bb0 MD |
1051 | sample->measure_delta = measure_delta; |
1052 | return 0; | |
d0b96690 DG |
1053 | } |
1054 | ||
8c645bb0 MD |
1055 | /* |
1056 | * Approximation of NTP time of day to clock monotonic correlation, | |
1057 | * taken at start of trace. Keep the measurement that took the less time | |
1058 | * to complete, thus removing imprecision caused by preemption. | |
c2636b57 | 1059 | * May return a negative offset. |
8c645bb0 MD |
1060 | */ |
1061 | static | |
c2636b57 | 1062 | int64_t measure_clock_offset(void) |
8c645bb0 MD |
1063 | { |
1064 | int i; | |
1065 | struct offset_sample offset_best_sample = { | |
1066 | .offset = 0, | |
1067 | .measure_delta = UINT64_MAX, | |
1068 | }; | |
1069 | ||
1070 | for (i = 0; i < NR_CLOCK_OFFSET_SAMPLES; i++) { | |
1071 | if (measure_single_clock_offset(&offset_best_sample)) { | |
1072 | return 0; | |
1073 | } | |
1074 | } | |
1075 | return offset_best_sample.offset; | |
1076 | } | |
d0b96690 | 1077 | |
8de88061 JR |
1078 | static |
1079 | int print_metadata_session_information(struct ust_registry_session *registry) | |
1080 | { | |
1081 | int ret; | |
1082 | struct ltt_session *session = NULL; | |
1083 | char creation_datetime[ISO8601_STR_LEN]; | |
1084 | ||
1085 | rcu_read_lock(); | |
1086 | session = session_find_by_id(registry->tracing_id); | |
1087 | if (!session) { | |
1088 | ret = -1; | |
1089 | goto error; | |
1090 | } | |
1091 | ||
1092 | /* Print the trace name */ | |
1093 | ret = lttng_metadata_printf(registry, " trace_name = \""); | |
1094 | if (ret) { | |
1095 | goto error; | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * This is necessary since the creation time is present in the session | |
1100 | * name when it is generated. | |
1101 | */ | |
1102 | if (session->has_auto_generated_name) { | |
1103 | ret = print_escaped_ctf_string(registry, DEFAULT_SESSION_NAME); | |
1104 | } else { | |
1105 | ret = print_escaped_ctf_string(registry, session->name); | |
1106 | } | |
1107 | if (ret) { | |
1108 | goto error; | |
1109 | } | |
1110 | ||
1111 | ret = lttng_metadata_printf(registry, "\";\n"); | |
1112 | if (ret) { | |
1113 | goto error; | |
1114 | } | |
1115 | ||
1116 | /* Prepare creation time */ | |
1117 | ret = time_to_iso8601_str(session->creation_time, creation_datetime, | |
1118 | sizeof(creation_datetime)); | |
1119 | if (ret) { | |
1120 | goto error; | |
1121 | } | |
1122 | ||
1123 | /* Output the reste of the information */ | |
1124 | ret = lttng_metadata_printf(registry, | |
1125 | " trace_creation_datetime = \"%s\";\n" | |
1126 | " hostname = \"%s\";\n", | |
1127 | creation_datetime, session->hostname); | |
1128 | if (ret) { | |
1129 | goto error; | |
1130 | } | |
1131 | ||
1132 | error: | |
1133 | if (session) { | |
1134 | session_put(session); | |
1135 | } | |
1136 | rcu_read_unlock(); | |
1137 | return ret; | |
1138 | } | |
1139 | ||
1140 | static | |
1141 | int print_metadata_app_information(struct ust_registry_session *registry, | |
1142 | struct ust_app *app) | |
1143 | { | |
1144 | int ret; | |
1145 | char datetime[ISO8601_STR_LEN]; | |
1146 | ||
1147 | if (!app) { | |
1148 | ret = 0; | |
1149 | goto end; | |
1150 | } | |
1151 | ||
1152 | ret = time_to_iso8601_str( | |
1153 | app->registration_time, datetime, sizeof(datetime)); | |
1154 | if (ret) { | |
1155 | goto end; | |
1156 | } | |
1157 | ||
1158 | ret = lttng_metadata_printf(registry, | |
1159 | " tracer_patchlevel = %u;\n" | |
1160 | " vpid = %d;\n" | |
1161 | " procname = \"%s\";\n" | |
1162 | " vpid_datetime = \"%s\";\n", | |
1163 | app->version.patchlevel, (int) app->pid, app->name, | |
1164 | datetime); | |
1165 | ||
1166 | end: | |
1167 | return ret; | |
1168 | } | |
1169 | ||
d0b96690 DG |
1170 | /* |
1171 | * Should be called with session registry mutex held. | |
1172 | */ | |
1173 | int ust_metadata_session_statedump(struct ust_registry_session *session, | |
af6142cf MD |
1174 | struct ust_app *app, |
1175 | uint32_t major, | |
1176 | uint32_t minor) | |
d0b96690 | 1177 | { |
c70636a7 MJ |
1178 | char uuid_s[LTTNG_UUID_STR_LEN], |
1179 | clock_uuid_s[LTTNG_UUID_STR_LEN]; | |
d0b96690 | 1180 | int ret = 0; |
d0b96690 | 1181 | |
7972aab2 | 1182 | assert(session); |
7972aab2 | 1183 | |
c8e0c5f5 | 1184 | lttng_uuid_to_str(session->uuid, uuid_s); |
d0b96690 | 1185 | |
d7ba1388 MD |
1186 | /* For crash ABI */ |
1187 | ret = lttng_metadata_printf(session, | |
1188 | "/* CTF %u.%u */\n\n", | |
1189 | CTF_SPEC_MAJOR, | |
1190 | CTF_SPEC_MINOR); | |
1191 | if (ret) { | |
1192 | goto end; | |
1193 | } | |
1194 | ||
d0b96690 DG |
1195 | ret = lttng_metadata_printf(session, |
1196 | "typealias integer { size = 8; align = %u; signed = false; } := uint8_t;\n" | |
1197 | "typealias integer { size = 16; align = %u; signed = false; } := uint16_t;\n" | |
1198 | "typealias integer { size = 32; align = %u; signed = false; } := uint32_t;\n" | |
1199 | "typealias integer { size = 64; align = %u; signed = false; } := uint64_t;\n" | |
1200 | "typealias integer { size = %u; align = %u; signed = false; } := unsigned long;\n" | |
1201 | "typealias integer { size = 5; align = 1; signed = false; } := uint5_t;\n" | |
1202 | "typealias integer { size = 27; align = 1; signed = false; } := uint27_t;\n" | |
1203 | "\n" | |
1204 | "trace {\n" | |
1205 | " major = %u;\n" | |
1206 | " minor = %u;\n" | |
1207 | " uuid = \"%s\";\n" | |
1208 | " byte_order = %s;\n" | |
1209 | " packet.header := struct {\n" | |
1210 | " uint32_t magic;\n" | |
1211 | " uint8_t uuid[16];\n" | |
1212 | " uint32_t stream_id;\n" | |
0793bcc6 | 1213 | " uint64_t stream_instance_id;\n" |
d0b96690 DG |
1214 | " };\n" |
1215 | "};\n\n", | |
1216 | session->uint8_t_alignment, | |
1217 | session->uint16_t_alignment, | |
1218 | session->uint32_t_alignment, | |
1219 | session->uint64_t_alignment, | |
1220 | session->bits_per_long, | |
1221 | session->long_alignment, | |
1222 | CTF_SPEC_MAJOR, | |
1223 | CTF_SPEC_MINOR, | |
1224 | uuid_s, | |
1225 | session->byte_order == BIG_ENDIAN ? "be" : "le" | |
1226 | ); | |
0d32d1a9 | 1227 | if (ret) { |
d0b96690 | 1228 | goto end; |
0d32d1a9 | 1229 | } |
d0b96690 | 1230 | |
d0b96690 DG |
1231 | ret = lttng_metadata_printf(session, |
1232 | "env {\n" | |
d0b96690 DG |
1233 | " domain = \"ust\";\n" |
1234 | " tracer_name = \"lttng-ust\";\n" | |
1235 | " tracer_major = %u;\n" | |
8de88061 JR |
1236 | " tracer_minor = %u;\n" |
1237 | " tracer_buffering_scheme = \"%s\";\n" | |
1238 | " tracer_buffering_id = %u;\n" | |
1239 | " architecture_bit_width = %u;\n", | |
af6142cf | 1240 | major, |
8de88061 JR |
1241 | minor, |
1242 | app ? "pid" : "uid", | |
1243 | app ? (int) app->pid : (int) session->tracing_uid, | |
1244 | session->bits_per_long); | |
1245 | if (ret) { | |
1246 | goto end; | |
1247 | } | |
1248 | ||
1249 | ret = print_metadata_session_information(session); | |
1250 | if (ret) { | |
d0b96690 | 1251 | goto end; |
8de88061 | 1252 | } |
d0b96690 DG |
1253 | |
1254 | /* | |
1255 | * If per-application registry, we can output extra information | |
1256 | * about the application. | |
1257 | */ | |
8de88061 JR |
1258 | ret = print_metadata_app_information(session, app); |
1259 | if (ret) { | |
1260 | goto end; | |
d0b96690 DG |
1261 | } |
1262 | ||
1263 | ret = lttng_metadata_printf(session, | |
1264 | "};\n\n" | |
1265 | ); | |
0d32d1a9 | 1266 | if (ret) { |
d0b96690 | 1267 | goto end; |
0d32d1a9 | 1268 | } |
d0b96690 DG |
1269 | |
1270 | ret = lttng_metadata_printf(session, | |
1271 | "clock {\n" | |
fc0bb9fa MD |
1272 | " name = \"%s\";\n", |
1273 | trace_clock_name() | |
d0b96690 | 1274 | ); |
0d32d1a9 | 1275 | if (ret) { |
d0b96690 | 1276 | goto end; |
0d32d1a9 | 1277 | } |
d0b96690 DG |
1278 | |
1279 | if (!trace_clock_uuid(clock_uuid_s)) { | |
1280 | ret = lttng_metadata_printf(session, | |
1281 | " uuid = \"%s\";\n", | |
1282 | clock_uuid_s | |
1283 | ); | |
0d32d1a9 | 1284 | if (ret) { |
d0b96690 | 1285 | goto end; |
0d32d1a9 | 1286 | } |
d0b96690 DG |
1287 | } |
1288 | ||
1289 | ret = lttng_metadata_printf(session, | |
fc0bb9fa | 1290 | " description = \"%s\";\n" |
d0b96690 DG |
1291 | " freq = %" PRIu64 "; /* Frequency, in Hz */\n" |
1292 | " /* clock value offset from Epoch is: offset * (1/freq) */\n" | |
c2636b57 | 1293 | " offset = %" PRId64 ";\n" |
d0b96690 | 1294 | "};\n\n", |
fc0bb9fa | 1295 | trace_clock_description(), |
d0b96690 DG |
1296 | trace_clock_freq(), |
1297 | measure_clock_offset() | |
1298 | ); | |
0d32d1a9 | 1299 | if (ret) { |
d0b96690 | 1300 | goto end; |
0d32d1a9 | 1301 | } |
d0b96690 DG |
1302 | |
1303 | ret = lttng_metadata_printf(session, | |
1304 | "typealias integer {\n" | |
1305 | " size = 27; align = 1; signed = false;\n" | |
fc0bb9fa | 1306 | " map = clock.%s.value;\n" |
d0b96690 DG |
1307 | "} := uint27_clock_monotonic_t;\n" |
1308 | "\n" | |
1309 | "typealias integer {\n" | |
1310 | " size = 32; align = %u; signed = false;\n" | |
fc0bb9fa | 1311 | " map = clock.%s.value;\n" |
d0b96690 DG |
1312 | "} := uint32_clock_monotonic_t;\n" |
1313 | "\n" | |
1314 | "typealias integer {\n" | |
1315 | " size = 64; align = %u; signed = false;\n" | |
fc0bb9fa | 1316 | " map = clock.%s.value;\n" |
d0b96690 | 1317 | "} := uint64_clock_monotonic_t;\n\n", |
fc0bb9fa | 1318 | trace_clock_name(), |
d0b96690 | 1319 | session->uint32_t_alignment, |
fc0bb9fa MD |
1320 | trace_clock_name(), |
1321 | session->uint64_t_alignment, | |
1322 | trace_clock_name() | |
d0b96690 | 1323 | ); |
0d32d1a9 | 1324 | if (ret) { |
d0b96690 | 1325 | goto end; |
0d32d1a9 | 1326 | } |
d0b96690 DG |
1327 | |
1328 | ret = _lttng_stream_packet_context_declare(session); | |
0d32d1a9 | 1329 | if (ret) { |
d0b96690 | 1330 | goto end; |
0d32d1a9 | 1331 | } |
d0b96690 DG |
1332 | |
1333 | ret = _lttng_event_header_declare(session); | |
0d32d1a9 | 1334 | if (ret) { |
d0b96690 | 1335 | goto end; |
0d32d1a9 | 1336 | } |
d0b96690 DG |
1337 | |
1338 | end: | |
1339 | return ret; | |
1340 | } |