Commit | Line | Data |
---|---|---|
273b65be JG |
1 | /* |
2 | * writer.c | |
3 | * | |
4 | * Babeltrace CTF Writer | |
5 | * | |
6 | * Copyright 2013 EfficiOS Inc. | |
7 | * | |
8 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
9 | * | |
10 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
11 | * of this software and associated documentation files (the "Software"), to deal | |
12 | * in the Software without restriction, including without limitation the rights | |
13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
14 | * copies of the Software, and to permit persons to whom the Software is | |
15 | * furnished to do so, subject to the following conditions: | |
16 | * | |
17 | * The above copyright notice and this permission notice shall be included in | |
18 | * all copies or substantial portions of the Software. | |
19 | * | |
20 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
21 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
23 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
24 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
25 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
26 | * SOFTWARE. | |
27 | */ | |
28 | ||
29 | #include <babeltrace/ctf-writer/writer.h> | |
30 | #include <babeltrace/ctf-writer/clock.h> | |
31 | #include <babeltrace/ctf-writer/clock-internal.h> | |
32 | #include <babeltrace/ctf-writer/writer-internal.h> | |
33 | #include <babeltrace/ctf-writer/event-types-internal.h> | |
34 | #include <babeltrace/ctf-writer/event-fields-internal.h> | |
35 | #include <babeltrace/ctf-writer/functor-internal.h> | |
36 | #include <babeltrace/ctf-writer/stream-internal.h> | |
37 | #include <babeltrace/ctf-writer/stream.h> | |
38 | #include <babeltrace/compiler.h> | |
f6afb94e | 39 | #include <babeltrace/endian.h> |
273b65be JG |
40 | #include <stdio.h> |
41 | #include <stdlib.h> | |
42 | #include <sys/stat.h> | |
43 | #include <errno.h> | |
44 | #include <unistd.h> | |
45 | #include <fcntl.h> | |
46 | #include <inttypes.h> | |
47 | ||
48 | #define DEFAULT_IDENTIFIER_SIZE 128 | |
49 | #define DEFAULT_METADATA_STRING_SIZE 4096 | |
50 | ||
51 | static | |
52 | void environment_variable_destroy(struct environment_variable *var); | |
53 | static | |
54 | void bt_ctf_writer_destroy(struct bt_ctf_ref *ref); | |
55 | static | |
56 | int init_trace_packet_header(struct bt_ctf_writer *writer); | |
57 | static | |
58 | int create_stream_file(struct bt_ctf_writer *writer, | |
59 | struct bt_ctf_stream *stream); | |
60 | static | |
61 | void stream_flush_cb(struct bt_ctf_stream *stream, | |
62 | struct bt_ctf_writer *writer); | |
63 | ||
64 | static | |
65 | const char * const reserved_keywords_str[] = {"align", "callsite", | |
66 | "const", "char", "clock", "double", "enum", "env", "event", | |
67 | "floating_point", "float", "integer", "int", "long", "short", "signed", | |
68 | "stream", "string", "struct", "trace", "typealias", "typedef", | |
69 | "unsigned", "variant", "void" "_Bool", "_Complex", "_Imaginary"}; | |
70 | ||
71 | static | |
72 | const unsigned int field_type_aliases_alignments[] = { | |
73 | [FIELD_TYPE_ALIAS_UINT5_T] = 1, | |
74 | [FIELD_TYPE_ALIAS_UINT8_T ... FIELD_TYPE_ALIAS_UINT16_T] = 8, | |
75 | [FIELD_TYPE_ALIAS_UINT27_T] = 1, | |
76 | [FIELD_TYPE_ALIAS_UINT32_T ... FIELD_TYPE_ALIAS_UINT64_T] = 8, | |
77 | }; | |
78 | ||
79 | static | |
80 | const unsigned int field_type_aliases_sizes[] = { | |
81 | [FIELD_TYPE_ALIAS_UINT5_T] = 5, | |
82 | [FIELD_TYPE_ALIAS_UINT8_T] = 8, | |
83 | [FIELD_TYPE_ALIAS_UINT16_T] = 16, | |
84 | [FIELD_TYPE_ALIAS_UINT27_T] = 27, | |
85 | [FIELD_TYPE_ALIAS_UINT32_T] = 32, | |
86 | [FIELD_TYPE_ALIAS_UINT64_T] = 64, | |
87 | }; | |
88 | ||
89 | static GHashTable *reserved_keywords_set; | |
90 | static int init_done; | |
91 | static int global_data_refcount; | |
92 | ||
93 | struct bt_ctf_writer *bt_ctf_writer_create(const char *path) | |
94 | { | |
95 | struct bt_ctf_writer *writer = NULL; | |
96 | ||
97 | if (!path) { | |
98 | goto error; | |
99 | } | |
100 | ||
101 | writer = g_new0(struct bt_ctf_writer, 1); | |
102 | if (!writer) { | |
103 | goto error; | |
104 | } | |
105 | ||
106 | bt_ctf_writer_set_byte_order(writer, BT_CTF_BYTE_ORDER_NATIVE); | |
107 | bt_ctf_ref_init(&writer->ref_count); | |
108 | writer->path = g_string_new(path); | |
109 | if (!writer->path) { | |
110 | goto error_destroy; | |
111 | } | |
112 | ||
113 | /* Create trace directory if necessary and open a metadata file */ | |
114 | if (g_mkdir_with_parents(path, S_IRWXU | S_IRWXG)) { | |
115 | perror("g_mkdir_with_parents"); | |
116 | goto error_destroy; | |
117 | } | |
118 | ||
1b8180b9 | 119 | writer->trace_dir_fd = open(path, O_RDONLY, S_IRWXU | S_IRWXG); |
273b65be JG |
120 | if (writer->trace_dir_fd < 0) { |
121 | perror("open"); | |
122 | goto error_destroy; | |
123 | } | |
124 | ||
125 | writer->metadata_fd = openat(writer->trace_dir_fd, "metadata", | |
126 | O_WRONLY | O_CREAT | O_TRUNC, | |
127 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
128 | writer->environment = g_ptr_array_new_with_free_func( | |
129 | (GDestroyNotify)environment_variable_destroy); | |
130 | writer->clocks = g_ptr_array_new_with_free_func( | |
131 | (GDestroyNotify)bt_ctf_clock_put); | |
132 | writer->streams = g_ptr_array_new_with_free_func( | |
133 | (GDestroyNotify)bt_ctf_stream_put); | |
134 | writer->stream_classes = g_ptr_array_new_with_free_func( | |
135 | (GDestroyNotify)bt_ctf_stream_class_put); | |
136 | if (!writer->environment || !writer->clocks || | |
137 | !writer->stream_classes || !writer->streams) { | |
138 | goto error_destroy; | |
139 | } | |
140 | ||
141 | /* Generate a trace UUID */ | |
142 | uuid_generate(writer->uuid); | |
143 | if (init_trace_packet_header(writer)) { | |
144 | goto error_destroy; | |
145 | } | |
146 | ||
147 | return writer; | |
148 | error_destroy: | |
149 | unlinkat(writer->trace_dir_fd, "metadata", 0); | |
150 | bt_ctf_writer_destroy(&writer->ref_count); | |
151 | writer = NULL; | |
152 | error: | |
153 | return writer; | |
154 | } | |
155 | ||
156 | void bt_ctf_writer_destroy(struct bt_ctf_ref *ref) | |
157 | { | |
158 | struct bt_ctf_writer *writer; | |
159 | ||
160 | if (!ref) { | |
161 | return; | |
162 | } | |
163 | ||
164 | writer = container_of(ref, struct bt_ctf_writer, ref_count); | |
165 | bt_ctf_writer_flush_metadata(writer); | |
166 | if (writer->path) { | |
167 | g_string_free(writer->path, TRUE); | |
168 | } | |
169 | ||
170 | if (writer->trace_dir_fd > 0) { | |
9bb7e58b MD |
171 | if (close(writer->trace_dir_fd)) { |
172 | perror("close"); | |
173 | abort(); | |
174 | } | |
273b65be JG |
175 | } |
176 | ||
177 | if (writer->metadata_fd > 0) { | |
9bb7e58b MD |
178 | if (close(writer->metadata_fd)) { |
179 | perror("close"); | |
180 | abort(); | |
181 | } | |
273b65be JG |
182 | } |
183 | ||
184 | if (writer->environment) { | |
185 | g_ptr_array_free(writer->environment, TRUE); | |
186 | } | |
187 | ||
188 | if (writer->clocks) { | |
189 | g_ptr_array_free(writer->clocks, TRUE); | |
190 | } | |
191 | ||
192 | if (writer->streams) { | |
193 | g_ptr_array_free(writer->streams, TRUE); | |
194 | } | |
195 | ||
196 | if (writer->stream_classes) { | |
197 | g_ptr_array_free(writer->stream_classes, TRUE); | |
198 | } | |
199 | ||
200 | bt_ctf_field_type_put(writer->trace_packet_header_type); | |
201 | bt_ctf_field_put(writer->trace_packet_header); | |
202 | g_free(writer); | |
203 | } | |
204 | ||
205 | struct bt_ctf_stream *bt_ctf_writer_create_stream(struct bt_ctf_writer *writer, | |
206 | struct bt_ctf_stream_class *stream_class) | |
207 | { | |
208 | int ret; | |
209 | int stream_class_found = 0; | |
210 | size_t i; | |
211 | int stream_fd; | |
212 | struct bt_ctf_stream *stream = NULL; | |
213 | ||
214 | if (!writer || !stream_class) { | |
215 | goto error; | |
216 | } | |
217 | ||
218 | stream = bt_ctf_stream_create(stream_class); | |
219 | if (!stream) { | |
220 | goto error; | |
221 | } | |
222 | ||
223 | stream_fd = create_stream_file(writer, stream); | |
224 | if (stream_fd < 0 || bt_ctf_stream_set_fd(stream, stream_fd)) { | |
225 | goto error; | |
226 | } | |
227 | ||
228 | bt_ctf_stream_set_flush_callback(stream, (flush_func)stream_flush_cb, | |
229 | writer); | |
230 | ret = bt_ctf_stream_class_set_byte_order(stream->stream_class, | |
231 | writer->byte_order == LITTLE_ENDIAN ? | |
232 | BT_CTF_BYTE_ORDER_LITTLE_ENDIAN : BT_CTF_BYTE_ORDER_BIG_ENDIAN); | |
233 | if (ret) { | |
234 | goto error; | |
235 | } | |
236 | ||
237 | for (i = 0; i < writer->stream_classes->len; i++) { | |
238 | if (writer->stream_classes->pdata[i] == stream->stream_class) { | |
239 | stream_class_found = 1; | |
240 | } | |
241 | } | |
242 | ||
243 | if (!stream_class_found) { | |
244 | if (bt_ctf_stream_class_set_id(stream->stream_class, | |
245 | writer->next_stream_id++)) { | |
246 | goto error; | |
247 | } | |
248 | ||
249 | bt_ctf_stream_class_get(stream->stream_class); | |
250 | g_ptr_array_add(writer->stream_classes, stream->stream_class); | |
251 | } | |
252 | ||
253 | bt_ctf_stream_get(stream); | |
254 | g_ptr_array_add(writer->streams, stream); | |
255 | writer->frozen = 1; | |
256 | return stream; | |
257 | error: | |
258 | bt_ctf_stream_put(stream); | |
259 | return NULL; | |
260 | } | |
261 | ||
262 | int bt_ctf_writer_add_environment_field(struct bt_ctf_writer *writer, | |
263 | const char *name, | |
264 | const char *value) | |
265 | { | |
266 | struct environment_variable *var = NULL; | |
267 | char *escaped_value = NULL; | |
268 | int ret = 0; | |
269 | ||
270 | if (!writer || !name || !value || validate_identifier(name)) { | |
271 | ret = -1; | |
272 | goto error; | |
273 | } | |
274 | ||
275 | if (strchr(name, ' ')) { | |
276 | ret = -1; | |
277 | goto error; | |
278 | } | |
279 | ||
280 | var = g_new0(struct environment_variable, 1); | |
281 | if (!var) { | |
282 | ret = -1; | |
283 | goto error; | |
284 | } | |
285 | ||
286 | escaped_value = g_strescape(value, NULL); | |
287 | if (!escaped_value) { | |
288 | ret = -1; | |
289 | goto error; | |
290 | } | |
291 | ||
292 | var->name = g_string_new(name); | |
293 | var->value = g_string_new(escaped_value); | |
294 | g_free(escaped_value); | |
295 | if (!var->name || !var->value) { | |
296 | ret = -1; | |
297 | goto error; | |
298 | } | |
299 | ||
300 | g_ptr_array_add(writer->environment, var); | |
301 | return ret; | |
302 | ||
303 | error: | |
304 | if (var && var->name) { | |
305 | g_string_free(var->name, TRUE); | |
306 | } | |
307 | ||
308 | if (var && var->value) { | |
309 | g_string_free(var->value, TRUE); | |
310 | } | |
311 | ||
312 | g_free(var); | |
313 | return ret; | |
314 | } | |
315 | ||
316 | int bt_ctf_writer_add_clock(struct bt_ctf_writer *writer, | |
317 | struct bt_ctf_clock *clock) | |
318 | { | |
319 | int ret = 0; | |
320 | struct search_query query = { .value = clock, .found = 0 }; | |
321 | ||
322 | if (!writer || !clock) { | |
323 | ret = -1; | |
324 | goto end; | |
325 | } | |
326 | ||
327 | /* Check for duplicate clocks */ | |
328 | g_ptr_array_foreach(writer->clocks, value_exists, &query); | |
329 | if (query.found) { | |
330 | ret = -1; | |
331 | goto end; | |
332 | } | |
333 | ||
334 | bt_ctf_clock_get(clock); | |
335 | g_ptr_array_add(writer->clocks, clock); | |
336 | end: | |
337 | return ret; | |
338 | } | |
339 | ||
340 | BT_HIDDEN | |
341 | const char *get_byte_order_string(int byte_order) | |
342 | { | |
343 | const char *string; | |
344 | ||
345 | switch (byte_order) { | |
346 | case LITTLE_ENDIAN: | |
347 | string = "le"; | |
348 | break; | |
349 | case BIG_ENDIAN: | |
350 | string = "be"; | |
351 | break; | |
352 | default: | |
353 | string = "unknown"; | |
354 | break; | |
355 | } | |
356 | ||
357 | return string; | |
358 | } | |
359 | ||
360 | static | |
12af6048 | 361 | int append_trace_metadata(struct bt_ctf_writer *writer, |
273b65be JG |
362 | struct metadata_context *context) |
363 | { | |
e32ff703 | 364 | unsigned char *uuid = writer->uuid; |
c4e511df | 365 | int ret; |
e32ff703 | 366 | |
273b65be JG |
367 | g_string_append(context->string, "trace {\n"); |
368 | ||
369 | g_string_append(context->string, "\tmajor = 1;\n"); | |
370 | g_string_append(context->string, "\tminor = 8;\n"); | |
371 | ||
273b65be JG |
372 | g_string_append_printf(context->string, |
373 | "\tuuid = \"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\";\n", | |
374 | uuid[0], uuid[1], uuid[2], uuid[3], | |
375 | uuid[4], uuid[5], uuid[6], uuid[7], | |
376 | uuid[8], uuid[9], uuid[10], uuid[11], | |
377 | uuid[12], uuid[13], uuid[14], uuid[15]); | |
378 | g_string_append_printf(context->string, "\tbyte_order = %s;\n", | |
379 | get_byte_order_string(writer->byte_order)); | |
380 | ||
381 | g_string_append(context->string, "\tpacket.header := "); | |
382 | context->current_indentation_level++; | |
383 | g_string_assign(context->field_name, ""); | |
c4e511df MD |
384 | ret = bt_ctf_field_type_serialize(writer->trace_packet_header_type, |
385 | context); | |
12af6048 JG |
386 | if (ret) { |
387 | goto end; | |
388 | } | |
273b65be JG |
389 | context->current_indentation_level--; |
390 | ||
391 | g_string_append(context->string, ";\n};\n\n"); | |
12af6048 JG |
392 | end: |
393 | return ret; | |
273b65be JG |
394 | } |
395 | ||
396 | static | |
397 | void append_env_field_metadata(struct environment_variable *var, | |
398 | struct metadata_context *context) | |
399 | { | |
400 | g_string_append_printf(context->string, "\t%s = \"%s\";\n", | |
401 | var->name->str, var->value->str); | |
402 | } | |
403 | ||
404 | static | |
405 | void append_env_metadata(struct bt_ctf_writer *writer, | |
406 | struct metadata_context *context) | |
407 | { | |
408 | if (writer->environment->len == 0) { | |
409 | return; | |
410 | } | |
411 | ||
412 | g_string_append(context->string, "env {\n"); | |
413 | g_ptr_array_foreach(writer->environment, | |
414 | (GFunc)append_env_field_metadata, context); | |
415 | g_string_append(context->string, "};\n\n"); | |
416 | } | |
417 | ||
418 | char *bt_ctf_writer_get_metadata_string(struct bt_ctf_writer *writer) | |
419 | { | |
420 | char *metadata = NULL; | |
421 | struct metadata_context *context = NULL; | |
422 | int err = 0; | |
423 | size_t i; | |
424 | ||
425 | if (!writer) { | |
426 | goto end; | |
427 | } | |
428 | ||
429 | context = g_new0(struct metadata_context, 1); | |
430 | if (!context) { | |
431 | goto end; | |
432 | } | |
433 | ||
434 | context->field_name = g_string_sized_new(DEFAULT_IDENTIFIER_SIZE); | |
435 | context->string = g_string_sized_new(DEFAULT_METADATA_STRING_SIZE); | |
436 | g_string_append(context->string, "/* CTF 1.8 */\n\n"); | |
12af6048 JG |
437 | if (append_trace_metadata(writer, context)) { |
438 | goto error; | |
439 | } | |
273b65be JG |
440 | append_env_metadata(writer, context); |
441 | g_ptr_array_foreach(writer->clocks, | |
442 | (GFunc)bt_ctf_clock_serialize, context); | |
443 | ||
444 | for (i = 0; i < writer->stream_classes->len; i++) { | |
445 | err = bt_ctf_stream_class_serialize( | |
446 | writer->stream_classes->pdata[i], context); | |
447 | if (err) { | |
448 | goto error; | |
449 | } | |
450 | } | |
451 | ||
452 | metadata = context->string->str; | |
453 | error: | |
454 | g_string_free(context->string, err ? TRUE : FALSE); | |
455 | g_string_free(context->field_name, TRUE); | |
456 | g_free(context); | |
457 | end: | |
458 | return metadata; | |
459 | } | |
460 | ||
461 | void bt_ctf_writer_flush_metadata(struct bt_ctf_writer *writer) | |
462 | { | |
463 | int ret; | |
464 | char *metadata_string = NULL; | |
465 | ||
466 | if (!writer) { | |
467 | goto end; | |
468 | } | |
469 | ||
470 | metadata_string = bt_ctf_writer_get_metadata_string(writer); | |
471 | if (!metadata_string) { | |
472 | goto end; | |
473 | } | |
474 | ||
475 | if (lseek(writer->metadata_fd, 0, SEEK_SET) == (off_t)-1) { | |
476 | perror("lseek"); | |
477 | goto end; | |
478 | } | |
479 | ||
480 | if (ftruncate(writer->metadata_fd, 0)) { | |
481 | perror("ftruncate"); | |
482 | goto end; | |
483 | } | |
484 | ||
485 | ret = write(writer->metadata_fd, metadata_string, | |
486 | strlen(metadata_string)); | |
487 | if (ret < 0) { | |
488 | perror("write"); | |
489 | goto end; | |
490 | } | |
491 | end: | |
492 | g_free(metadata_string); | |
493 | } | |
494 | ||
495 | int bt_ctf_writer_set_byte_order(struct bt_ctf_writer *writer, | |
496 | enum bt_ctf_byte_order byte_order) | |
497 | { | |
498 | int ret = 0; | |
499 | int internal_byte_order; | |
500 | ||
501 | if (!writer || writer->frozen) { | |
502 | ret = -1; | |
503 | goto end; | |
504 | } | |
505 | ||
506 | switch (byte_order) { | |
507 | case BT_CTF_BYTE_ORDER_NATIVE: | |
508 | internal_byte_order = (G_BYTE_ORDER == G_LITTLE_ENDIAN) ? | |
509 | LITTLE_ENDIAN : BIG_ENDIAN; | |
510 | break; | |
511 | case BT_CTF_BYTE_ORDER_LITTLE_ENDIAN: | |
512 | internal_byte_order = LITTLE_ENDIAN; | |
513 | break; | |
514 | case BT_CTF_BYTE_ORDER_BIG_ENDIAN: | |
515 | case BT_CTF_BYTE_ORDER_NETWORK: | |
516 | internal_byte_order = BIG_ENDIAN; | |
517 | break; | |
518 | default: | |
519 | ret = -1; | |
520 | goto end; | |
521 | } | |
522 | ||
523 | writer->byte_order = internal_byte_order; | |
524 | if (writer->trace_packet_header_type || | |
525 | writer->trace_packet_header) { | |
526 | init_trace_packet_header(writer); | |
527 | } | |
528 | end: | |
529 | return ret; | |
530 | } | |
531 | ||
532 | void bt_ctf_writer_get(struct bt_ctf_writer *writer) | |
533 | { | |
534 | if (!writer) { | |
535 | return; | |
536 | } | |
537 | ||
538 | bt_ctf_ref_get(&writer->ref_count); | |
539 | } | |
540 | ||
541 | void bt_ctf_writer_put(struct bt_ctf_writer *writer) | |
542 | { | |
543 | if (!writer) { | |
544 | return; | |
545 | } | |
546 | ||
547 | bt_ctf_ref_put(&writer->ref_count, bt_ctf_writer_destroy); | |
548 | } | |
549 | ||
550 | BT_HIDDEN | |
551 | int validate_identifier(const char *input_string) | |
552 | { | |
553 | int ret = 0; | |
554 | char *string = NULL; | |
555 | char *save_ptr, *token; | |
556 | ||
557 | if (!input_string || input_string[0] == '\0') { | |
558 | ret = -1; | |
559 | goto end; | |
560 | } | |
561 | ||
562 | string = strdup(input_string); | |
563 | if (!string) { | |
564 | ret = -1; | |
565 | goto end; | |
566 | } | |
567 | ||
568 | token = strtok_r(string, " ", &save_ptr); | |
569 | while (token) { | |
fe0fe95c JG |
570 | if (g_hash_table_lookup_extended(reserved_keywords_set, |
571 | GINT_TO_POINTER(g_quark_from_string(token)), | |
572 | NULL, NULL)) { | |
273b65be JG |
573 | ret = -1; |
574 | goto end; | |
575 | } | |
576 | ||
577 | token = strtok_r(NULL, " ", &save_ptr); | |
578 | } | |
579 | end: | |
580 | free(string); | |
581 | return ret; | |
582 | } | |
583 | ||
584 | BT_HIDDEN | |
585 | struct bt_ctf_field_type *get_field_type(enum field_type_alias alias) | |
586 | { | |
587 | unsigned int alignment, size; | |
588 | struct bt_ctf_field_type *field_type; | |
589 | ||
590 | if (alias >= NR_FIELD_TYPE_ALIAS) { | |
591 | return NULL; | |
592 | } | |
593 | ||
594 | alignment = field_type_aliases_alignments[alias]; | |
595 | size = field_type_aliases_sizes[alias]; | |
596 | field_type = bt_ctf_field_type_integer_create(size); | |
597 | bt_ctf_field_type_set_alignment(field_type, alignment); | |
598 | return field_type; | |
599 | } | |
600 | ||
601 | static | |
602 | int init_trace_packet_header(struct bt_ctf_writer *writer) | |
603 | { | |
604 | size_t i; | |
605 | int ret = 0; | |
606 | struct bt_ctf_field *trace_packet_header = NULL, | |
607 | *magic = NULL, *uuid_array = NULL; | |
608 | struct bt_ctf_field_type *_uint32_t = | |
609 | get_field_type(FIELD_TYPE_ALIAS_UINT32_T); | |
610 | struct bt_ctf_field_type *_uint8_t = | |
611 | get_field_type(FIELD_TYPE_ALIAS_UINT8_T); | |
612 | struct bt_ctf_field_type *trace_packet_header_type = | |
613 | bt_ctf_field_type_structure_create(); | |
614 | struct bt_ctf_field_type *uuid_array_type = | |
615 | bt_ctf_field_type_array_create(_uint8_t, 16); | |
616 | ||
617 | if (!trace_packet_header_type || !uuid_array_type) { | |
618 | ret = -1; | |
619 | goto end; | |
620 | } | |
621 | ||
622 | ret = bt_ctf_field_type_set_byte_order(_uint32_t, | |
623 | (writer->byte_order == LITTLE_ENDIAN ? | |
624 | BT_CTF_BYTE_ORDER_LITTLE_ENDIAN : | |
625 | BT_CTF_BYTE_ORDER_BIG_ENDIAN)); | |
626 | if (ret) { | |
627 | goto end; | |
628 | } | |
629 | ||
630 | ret = bt_ctf_field_type_structure_add_field(trace_packet_header_type, | |
631 | _uint32_t, "magic"); | |
632 | if (ret) { | |
633 | goto end; | |
634 | } | |
635 | ||
636 | ret = bt_ctf_field_type_structure_add_field(trace_packet_header_type, | |
637 | uuid_array_type, "uuid"); | |
638 | if (ret) { | |
639 | goto end; | |
640 | } | |
641 | ||
642 | ret = bt_ctf_field_type_structure_add_field(trace_packet_header_type, | |
643 | _uint32_t, "stream_id"); | |
644 | if (ret) { | |
645 | goto end; | |
646 | } | |
647 | ||
648 | trace_packet_header = bt_ctf_field_create(trace_packet_header_type); | |
649 | if (!trace_packet_header) { | |
650 | ret = -1; | |
651 | goto end; | |
652 | } | |
653 | ||
654 | magic = bt_ctf_field_structure_get_field(trace_packet_header, "magic"); | |
655 | ret = bt_ctf_field_unsigned_integer_set_value(magic, 0xC1FC1FC1); | |
656 | if (ret) { | |
657 | goto end; | |
658 | } | |
659 | ||
660 | uuid_array = bt_ctf_field_structure_get_field(trace_packet_header, | |
661 | "uuid"); | |
662 | for (i = 0; i < 16; i++) { | |
663 | struct bt_ctf_field *uuid_element = | |
664 | bt_ctf_field_array_get_field(uuid_array, i); | |
665 | ret = bt_ctf_field_unsigned_integer_set_value(uuid_element, | |
666 | writer->uuid[i]); | |
667 | bt_ctf_field_put(uuid_element); | |
668 | if (ret) { | |
669 | goto end; | |
670 | } | |
671 | } | |
672 | ||
673 | bt_ctf_field_type_put(writer->trace_packet_header_type); | |
674 | bt_ctf_field_put(writer->trace_packet_header); | |
675 | writer->trace_packet_header_type = trace_packet_header_type; | |
676 | writer->trace_packet_header = trace_packet_header; | |
677 | end: | |
678 | bt_ctf_field_type_put(uuid_array_type); | |
679 | bt_ctf_field_type_put(_uint32_t); | |
680 | bt_ctf_field_type_put(_uint8_t); | |
681 | bt_ctf_field_put(magic); | |
682 | bt_ctf_field_put(uuid_array); | |
683 | if (ret) { | |
684 | bt_ctf_field_type_put(trace_packet_header_type); | |
685 | bt_ctf_field_put(trace_packet_header); | |
686 | } | |
687 | ||
688 | return ret; | |
689 | } | |
690 | ||
691 | static | |
692 | void environment_variable_destroy(struct environment_variable *var) | |
693 | { | |
694 | g_string_free(var->name, TRUE); | |
695 | g_string_free(var->value, TRUE); | |
696 | g_free(var); | |
697 | } | |
698 | ||
699 | static | |
700 | int create_stream_file(struct bt_ctf_writer *writer, | |
701 | struct bt_ctf_stream *stream) | |
702 | { | |
703 | int fd; | |
704 | GString *filename = g_string_new(stream->stream_class->name->str); | |
705 | ||
706 | g_string_append_printf(filename, "_%" PRIu32, stream->id); | |
707 | fd = openat(writer->trace_dir_fd, filename->str, | |
708 | O_RDWR | O_CREAT | O_TRUNC, | |
709 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
710 | g_string_free(filename, TRUE); | |
711 | return fd; | |
712 | } | |
713 | ||
714 | static | |
715 | void stream_flush_cb(struct bt_ctf_stream *stream, struct bt_ctf_writer *writer) | |
716 | { | |
717 | struct bt_ctf_field *stream_id; | |
718 | ||
719 | /* Start a new packet in the stream */ | |
720 | if (stream->flushed_packet_count) { | |
721 | /* ctf_init_pos has already initialized the first packet */ | |
722 | ctf_packet_seek(&stream->pos.parent, 0, SEEK_CUR); | |
723 | } | |
724 | ||
725 | stream_id = bt_ctf_field_structure_get_field( | |
726 | writer->trace_packet_header, "stream_id"); | |
66a12737 JG |
727 | bt_ctf_field_unsigned_integer_set_value(stream_id, |
728 | stream->stream_class->id); | |
273b65be JG |
729 | bt_ctf_field_put(stream_id); |
730 | ||
731 | /* Write the trace_packet_header */ | |
732 | bt_ctf_field_serialize(writer->trace_packet_header, &stream->pos); | |
733 | } | |
734 | ||
735 | static __attribute__((constructor)) | |
736 | void writer_init(void) | |
737 | { | |
738 | size_t i; | |
739 | const size_t reserved_keywords_count = | |
740 | sizeof(reserved_keywords_str) / sizeof(char *); | |
741 | ||
742 | global_data_refcount++; | |
743 | if (init_done) { | |
744 | return; | |
745 | } | |
746 | ||
747 | reserved_keywords_set = g_hash_table_new(g_direct_hash, g_direct_equal); | |
748 | for (i = 0; i < reserved_keywords_count; i++) { | |
fe0fe95c JG |
749 | gpointer quark = GINT_TO_POINTER(g_quark_from_string( |
750 | reserved_keywords_str[i])); | |
751 | ||
752 | g_hash_table_insert(reserved_keywords_set, quark, quark); | |
273b65be JG |
753 | } |
754 | ||
755 | init_done = 1; | |
756 | } | |
757 | ||
758 | static __attribute__((destructor)) | |
759 | void writer_finalize(void) | |
760 | { | |
761 | if (--global_data_refcount == 0) { | |
762 | g_hash_table_destroy(reserved_keywords_set); | |
763 | } | |
764 | } |