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bc37ae52 JG |
1 | /* |
2 | * trace.c | |
3 | * | |
4 | * Babeltrace CTF IR - Trace | |
5 | * | |
6 | * Copyright 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
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-ir/trace-internal.h> | |
30 | #include <babeltrace/ctf-ir/clock-internal.h> | |
31 | #include <babeltrace/ctf-ir/stream-internal.h> | |
32 | #include <babeltrace/ctf-ir/stream-class-internal.h> | |
33 | #include <babeltrace/ctf-writer/functor-internal.h> | |
34 | #include <babeltrace/ctf-ir/event-types-internal.h> | |
35 | #include <babeltrace/compiler.h> | |
36 | ||
37 | #define DEFAULT_IDENTIFIER_SIZE 128 | |
38 | #define DEFAULT_METADATA_STRING_SIZE 4096 | |
39 | ||
40 | static | |
41 | void environment_variable_destroy(struct environment_variable *var); | |
42 | static | |
43 | void bt_ctf_trace_destroy(struct bt_ctf_ref *ref); | |
44 | static | |
45 | int init_trace_packet_header(struct bt_ctf_trace *trace); | |
46 | ||
47 | static | |
48 | const char * const reserved_keywords_str[] = {"align", "callsite", | |
49 | "const", "char", "clock", "double", "enum", "env", "event", | |
50 | "floating_point", "float", "integer", "int", "long", "short", "signed", | |
51 | "stream", "string", "struct", "trace", "typealias", "typedef", | |
52 | "unsigned", "variant", "void" "_Bool", "_Complex", "_Imaginary"}; | |
53 | ||
54 | static | |
55 | const unsigned int field_type_aliases_alignments[] = { | |
56 | [FIELD_TYPE_ALIAS_UINT5_T] = 1, | |
57 | [FIELD_TYPE_ALIAS_UINT8_T ... FIELD_TYPE_ALIAS_UINT16_T] = 8, | |
58 | [FIELD_TYPE_ALIAS_UINT27_T] = 1, | |
59 | [FIELD_TYPE_ALIAS_UINT32_T ... FIELD_TYPE_ALIAS_UINT64_T] = 8, | |
60 | }; | |
61 | ||
62 | static | |
63 | const unsigned int field_type_aliases_sizes[] = { | |
64 | [FIELD_TYPE_ALIAS_UINT5_T] = 5, | |
65 | [FIELD_TYPE_ALIAS_UINT8_T] = 8, | |
66 | [FIELD_TYPE_ALIAS_UINT16_T] = 16, | |
67 | [FIELD_TYPE_ALIAS_UINT27_T] = 27, | |
68 | [FIELD_TYPE_ALIAS_UINT32_T] = 32, | |
69 | [FIELD_TYPE_ALIAS_UINT64_T] = 64, | |
70 | }; | |
71 | ||
72 | static GHashTable *reserved_keywords_set; | |
73 | static int init_done; | |
74 | static int global_data_refcount; | |
75 | ||
76 | struct bt_ctf_trace *bt_ctf_trace_create(void) | |
77 | { | |
78 | struct bt_ctf_trace *trace = NULL; | |
79 | ||
80 | trace = g_new0(struct bt_ctf_trace, 1); | |
81 | if (!trace) { | |
82 | goto error; | |
83 | } | |
84 | ||
85 | bt_ctf_trace_set_byte_order(trace, BT_CTF_BYTE_ORDER_NATIVE); | |
86 | bt_ctf_ref_init(&trace->ref_count); | |
87 | trace->environment = g_ptr_array_new_with_free_func( | |
88 | (GDestroyNotify)environment_variable_destroy); | |
89 | trace->clocks = g_ptr_array_new_with_free_func( | |
90 | (GDestroyNotify)bt_ctf_clock_put); | |
91 | trace->streams = g_ptr_array_new_with_free_func( | |
92 | (GDestroyNotify)bt_ctf_stream_put); | |
93 | trace->stream_classes = g_ptr_array_new_with_free_func( | |
94 | (GDestroyNotify)bt_ctf_stream_class_put); | |
95 | if (!trace->environment || !trace->clocks || | |
96 | !trace->stream_classes || !trace->streams) { | |
97 | goto error_destroy; | |
98 | } | |
99 | ||
100 | /* Generate a trace UUID */ | |
101 | uuid_generate(trace->uuid); | |
102 | if (init_trace_packet_header(trace)) { | |
103 | goto error_destroy; | |
104 | } | |
105 | ||
106 | return trace; | |
107 | ||
108 | error_destroy: | |
109 | bt_ctf_trace_destroy(&trace->ref_count); | |
110 | trace = NULL; | |
111 | error: | |
112 | return trace; | |
113 | } | |
114 | ||
115 | void bt_ctf_trace_destroy(struct bt_ctf_ref *ref) | |
116 | { | |
117 | struct bt_ctf_trace *trace; | |
118 | ||
119 | if (!ref) { | |
120 | return; | |
121 | } | |
122 | ||
123 | trace = container_of(ref, struct bt_ctf_trace, ref_count); | |
124 | if (trace->environment) { | |
125 | g_ptr_array_free(trace->environment, TRUE); | |
126 | } | |
127 | ||
128 | if (trace->clocks) { | |
129 | g_ptr_array_free(trace->clocks, TRUE); | |
130 | } | |
131 | ||
132 | if (trace->streams) { | |
133 | g_ptr_array_free(trace->streams, TRUE); | |
134 | } | |
135 | ||
136 | if (trace->stream_classes) { | |
137 | g_ptr_array_free(trace->stream_classes, TRUE); | |
138 | } | |
139 | ||
140 | bt_ctf_field_type_put(trace->trace_packet_header_type); | |
141 | bt_ctf_field_put(trace->trace_packet_header); | |
142 | g_free(trace); | |
143 | } | |
144 | ||
145 | struct bt_ctf_stream *bt_ctf_trace_create_stream(struct bt_ctf_trace *trace, | |
146 | struct bt_ctf_stream_class *stream_class) | |
147 | { | |
148 | int ret; | |
149 | int stream_class_found = 0; | |
150 | size_t i; | |
151 | struct bt_ctf_stream *stream = NULL; | |
152 | ||
153 | if (!trace || !stream_class) { | |
154 | goto error; | |
155 | } | |
156 | ||
157 | ret = bt_ctf_stream_class_set_byte_order(stream_class, | |
158 | trace->byte_order == LITTLE_ENDIAN ? | |
159 | BT_CTF_BYTE_ORDER_LITTLE_ENDIAN : BT_CTF_BYTE_ORDER_BIG_ENDIAN); | |
160 | if (ret) { | |
161 | goto error; | |
162 | } | |
163 | ||
164 | stream = bt_ctf_stream_create(stream_class); | |
165 | if (!stream) { | |
166 | goto error; | |
167 | } | |
168 | ||
169 | for (i = 0; i < trace->stream_classes->len; i++) { | |
170 | if (trace->stream_classes->pdata[i] == stream_class) { | |
171 | stream_class_found = 1; | |
172 | } | |
173 | } | |
174 | ||
175 | if (!stream_class_found) { | |
176 | int64_t stream_id = bt_ctf_stream_class_get_id(stream_class); | |
177 | ||
178 | if (stream_id < 0) { | |
179 | /* Try to assign a new stream id */ | |
180 | if (bt_ctf_stream_class_set_id(stream->stream_class, | |
181 | trace->next_stream_id++)) { | |
182 | goto error; | |
183 | } | |
184 | } | |
185 | ||
186 | for (i = 0; i < trace->stream_classes->len; i++) { | |
187 | if (stream_id == bt_ctf_stream_class_get_id( | |
188 | trace->stream_classes->pdata[i])) { | |
189 | /* Duplicate stream id found */ | |
190 | goto error; | |
191 | } | |
192 | } | |
193 | bt_ctf_stream_class_get(stream->stream_class); | |
194 | g_ptr_array_add(trace->stream_classes, stream->stream_class); | |
195 | } | |
196 | ||
197 | bt_ctf_stream_get(stream); | |
198 | g_ptr_array_add(trace->streams, stream); | |
199 | trace->frozen = 1; | |
200 | return stream; | |
201 | ||
202 | error: | |
203 | bt_ctf_stream_put(stream); | |
204 | return NULL; | |
205 | } | |
206 | ||
207 | int bt_ctf_trace_add_environment_field(struct bt_ctf_trace *trace, | |
208 | const char *name, | |
209 | const char *value) | |
210 | { | |
211 | struct environment_variable *var = NULL; | |
212 | char *escaped_value = NULL; | |
213 | int ret = 0; | |
214 | ||
215 | if (!trace || !name || !value || validate_identifier(name)) { | |
216 | ret = -1; | |
217 | goto error; | |
218 | } | |
219 | ||
220 | if (strchr(name, ' ')) { | |
221 | ret = -1; | |
222 | goto error; | |
223 | } | |
224 | ||
225 | var = g_new0(struct environment_variable, 1); | |
226 | if (!var) { | |
227 | ret = -1; | |
228 | goto error; | |
229 | } | |
230 | ||
231 | escaped_value = g_strescape(value, NULL); | |
232 | if (!escaped_value) { | |
233 | ret = -1; | |
234 | goto error; | |
235 | } | |
236 | ||
237 | var->name = g_string_new(name); | |
238 | var->value = g_string_new(escaped_value); | |
239 | g_free(escaped_value); | |
240 | if (!var->name || !var->value) { | |
241 | ret = -1; | |
242 | goto error; | |
243 | } | |
244 | ||
245 | g_ptr_array_add(trace->environment, var); | |
246 | return ret; | |
247 | ||
248 | error: | |
249 | if (var && var->name) { | |
250 | g_string_free(var->name, TRUE); | |
251 | } | |
252 | ||
253 | if (var && var->value) { | |
254 | g_string_free(var->value, TRUE); | |
255 | } | |
256 | ||
257 | g_free(var); | |
258 | return ret; | |
259 | } | |
260 | ||
261 | int bt_ctf_trace_add_clock(struct bt_ctf_trace *trace, | |
262 | struct bt_ctf_clock *clock) | |
263 | { | |
264 | int ret = 0; | |
265 | struct search_query query = { .value = clock, .found = 0 }; | |
266 | ||
267 | if (!trace || !clock) { | |
268 | ret = -1; | |
269 | goto end; | |
270 | } | |
271 | ||
272 | /* Check for duplicate clocks */ | |
273 | g_ptr_array_foreach(trace->clocks, value_exists, &query); | |
274 | if (query.found) { | |
275 | ret = -1; | |
276 | goto end; | |
277 | } | |
278 | ||
279 | bt_ctf_clock_get(clock); | |
280 | g_ptr_array_add(trace->clocks, clock); | |
281 | end: | |
282 | return ret; | |
283 | } | |
284 | ||
285 | BT_HIDDEN | |
286 | const char *get_byte_order_string(int byte_order) | |
287 | { | |
288 | const char *string; | |
289 | ||
290 | switch (byte_order) { | |
291 | case LITTLE_ENDIAN: | |
292 | string = "le"; | |
293 | break; | |
294 | case BIG_ENDIAN: | |
295 | string = "be"; | |
296 | break; | |
297 | default: | |
298 | string = "unknown"; | |
299 | break; | |
300 | } | |
301 | ||
302 | return string; | |
303 | } | |
304 | ||
305 | static | |
306 | int append_trace_metadata(struct bt_ctf_trace *trace, | |
307 | struct metadata_context *context) | |
308 | { | |
309 | unsigned char *uuid = trace->uuid; | |
310 | int ret; | |
311 | ||
312 | g_string_append(context->string, "trace {\n"); | |
313 | ||
314 | g_string_append(context->string, "\tmajor = 1;\n"); | |
315 | g_string_append(context->string, "\tminor = 8;\n"); | |
316 | ||
317 | g_string_append_printf(context->string, | |
318 | "\tuuid = \"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\";\n", | |
319 | uuid[0], uuid[1], uuid[2], uuid[3], | |
320 | uuid[4], uuid[5], uuid[6], uuid[7], | |
321 | uuid[8], uuid[9], uuid[10], uuid[11], | |
322 | uuid[12], uuid[13], uuid[14], uuid[15]); | |
323 | g_string_append_printf(context->string, "\tbyte_order = %s;\n", | |
324 | get_byte_order_string(trace->byte_order)); | |
325 | ||
326 | g_string_append(context->string, "\tpacket.header := "); | |
327 | context->current_indentation_level++; | |
328 | g_string_assign(context->field_name, ""); | |
329 | ret = bt_ctf_field_type_serialize(trace->trace_packet_header_type, | |
330 | context); | |
331 | if (ret) { | |
332 | goto end; | |
333 | } | |
334 | context->current_indentation_level--; | |
335 | ||
336 | g_string_append(context->string, ";\n};\n\n"); | |
337 | end: | |
338 | return ret; | |
339 | } | |
340 | ||
341 | static | |
342 | void append_env_field_metadata(struct environment_variable *var, | |
343 | struct metadata_context *context) | |
344 | { | |
345 | g_string_append_printf(context->string, "\t%s = \"%s\";\n", | |
346 | var->name->str, var->value->str); | |
347 | } | |
348 | ||
349 | static | |
350 | void append_env_metadata(struct bt_ctf_trace *trace, | |
351 | struct metadata_context *context) | |
352 | { | |
353 | if (trace->environment->len == 0) { | |
354 | return; | |
355 | } | |
356 | ||
357 | g_string_append(context->string, "env {\n"); | |
358 | g_ptr_array_foreach(trace->environment, | |
359 | (GFunc)append_env_field_metadata, context); | |
360 | g_string_append(context->string, "};\n\n"); | |
361 | } | |
362 | ||
363 | char *bt_ctf_trace_get_metadata_string(struct bt_ctf_trace *trace) | |
364 | { | |
365 | char *metadata = NULL; | |
366 | struct metadata_context *context = NULL; | |
367 | int err = 0; | |
368 | size_t i; | |
369 | ||
370 | if (!trace) { | |
371 | goto end; | |
372 | } | |
373 | ||
374 | context = g_new0(struct metadata_context, 1); | |
375 | if (!context) { | |
376 | goto end; | |
377 | } | |
378 | ||
379 | context->field_name = g_string_sized_new(DEFAULT_IDENTIFIER_SIZE); | |
380 | context->string = g_string_sized_new(DEFAULT_METADATA_STRING_SIZE); | |
381 | g_string_append(context->string, "/* CTF 1.8 */\n\n"); | |
382 | if (append_trace_metadata(trace, context)) { | |
383 | goto error; | |
384 | } | |
385 | append_env_metadata(trace, context); | |
386 | g_ptr_array_foreach(trace->clocks, | |
387 | (GFunc)bt_ctf_clock_serialize, context); | |
388 | ||
389 | for (i = 0; i < trace->stream_classes->len; i++) { | |
390 | err = bt_ctf_stream_class_serialize( | |
391 | trace->stream_classes->pdata[i], context); | |
392 | if (err) { | |
393 | goto error; | |
394 | } | |
395 | } | |
396 | ||
397 | metadata = context->string->str; | |
398 | error: | |
399 | g_string_free(context->string, err ? TRUE : FALSE); | |
400 | g_string_free(context->field_name, TRUE); | |
401 | g_free(context); | |
402 | end: | |
403 | return metadata; | |
404 | } | |
405 | ||
406 | int bt_ctf_trace_set_byte_order(struct bt_ctf_trace *trace, | |
407 | enum bt_ctf_byte_order byte_order) | |
408 | { | |
409 | int ret = 0; | |
410 | int internal_byte_order; | |
411 | ||
412 | if (!trace || trace->frozen) { | |
413 | ret = -1; | |
414 | goto end; | |
415 | } | |
416 | ||
417 | switch (byte_order) { | |
418 | case BT_CTF_BYTE_ORDER_NATIVE: | |
419 | internal_byte_order = (G_BYTE_ORDER == G_LITTLE_ENDIAN) ? | |
420 | LITTLE_ENDIAN : BIG_ENDIAN; | |
421 | break; | |
422 | case BT_CTF_BYTE_ORDER_LITTLE_ENDIAN: | |
423 | internal_byte_order = LITTLE_ENDIAN; | |
424 | break; | |
425 | case BT_CTF_BYTE_ORDER_BIG_ENDIAN: | |
426 | case BT_CTF_BYTE_ORDER_NETWORK: | |
427 | internal_byte_order = BIG_ENDIAN; | |
428 | break; | |
429 | default: | |
430 | ret = -1; | |
431 | goto end; | |
432 | } | |
433 | ||
434 | trace->byte_order = internal_byte_order; | |
435 | if (trace->trace_packet_header_type || | |
436 | trace->trace_packet_header) { | |
437 | init_trace_packet_header(trace); | |
438 | } | |
439 | end: | |
440 | return ret; | |
441 | } | |
442 | ||
443 | void bt_ctf_trace_get(struct bt_ctf_trace *trace) | |
444 | { | |
445 | if (!trace) { | |
446 | return; | |
447 | } | |
448 | ||
449 | bt_ctf_ref_get(&trace->ref_count); | |
450 | } | |
451 | ||
452 | void bt_ctf_trace_put(struct bt_ctf_trace *trace) | |
453 | { | |
454 | if (!trace) { | |
455 | return; | |
456 | } | |
457 | ||
458 | bt_ctf_ref_put(&trace->ref_count, bt_ctf_trace_destroy); | |
459 | } | |
460 | ||
461 | BT_HIDDEN | |
462 | int validate_identifier(const char *input_string) | |
463 | { | |
464 | int ret = 0; | |
465 | char *string = NULL; | |
466 | char *save_ptr, *token; | |
467 | ||
468 | if (!input_string || input_string[0] == '\0') { | |
469 | ret = -1; | |
470 | goto end; | |
471 | } | |
472 | ||
473 | string = strdup(input_string); | |
474 | if (!string) { | |
475 | ret = -1; | |
476 | goto end; | |
477 | } | |
478 | ||
479 | token = strtok_r(string, " ", &save_ptr); | |
480 | while (token) { | |
481 | if (g_hash_table_lookup_extended(reserved_keywords_set, | |
482 | GINT_TO_POINTER(g_quark_from_string(token)), | |
483 | NULL, NULL)) { | |
484 | ret = -1; | |
485 | goto end; | |
486 | } | |
487 | ||
488 | token = strtok_r(NULL, " ", &save_ptr); | |
489 | } | |
490 | end: | |
491 | free(string); | |
492 | return ret; | |
493 | } | |
494 | ||
495 | BT_HIDDEN | |
496 | struct bt_ctf_field_type *get_field_type(enum field_type_alias alias) | |
497 | { | |
498 | unsigned int alignment, size; | |
499 | struct bt_ctf_field_type *field_type; | |
500 | ||
501 | if (alias >= NR_FIELD_TYPE_ALIAS) { | |
502 | return NULL; | |
503 | } | |
504 | ||
505 | alignment = field_type_aliases_alignments[alias]; | |
506 | size = field_type_aliases_sizes[alias]; | |
507 | field_type = bt_ctf_field_type_integer_create(size); | |
508 | bt_ctf_field_type_set_alignment(field_type, alignment); | |
509 | return field_type; | |
510 | } | |
511 | ||
512 | static | |
513 | int init_trace_packet_header(struct bt_ctf_trace *trace) | |
514 | { | |
515 | size_t i; | |
516 | int ret = 0; | |
517 | struct bt_ctf_field *trace_packet_header = NULL, | |
518 | *magic = NULL, *uuid_array = NULL; | |
519 | struct bt_ctf_field_type *_uint32_t = | |
520 | get_field_type(FIELD_TYPE_ALIAS_UINT32_T); | |
521 | struct bt_ctf_field_type *_uint8_t = | |
522 | get_field_type(FIELD_TYPE_ALIAS_UINT8_T); | |
523 | struct bt_ctf_field_type *trace_packet_header_type = | |
524 | bt_ctf_field_type_structure_create(); | |
525 | struct bt_ctf_field_type *uuid_array_type = | |
526 | bt_ctf_field_type_array_create(_uint8_t, 16); | |
527 | ||
528 | if (!trace_packet_header_type || !uuid_array_type) { | |
529 | ret = -1; | |
530 | goto end; | |
531 | } | |
532 | ||
533 | ret = bt_ctf_field_type_set_byte_order(_uint32_t, | |
534 | (trace->byte_order == LITTLE_ENDIAN ? | |
535 | BT_CTF_BYTE_ORDER_LITTLE_ENDIAN : | |
536 | BT_CTF_BYTE_ORDER_BIG_ENDIAN)); | |
537 | if (ret) { | |
538 | goto end; | |
539 | } | |
540 | ||
541 | ret = bt_ctf_field_type_structure_add_field(trace_packet_header_type, | |
542 | _uint32_t, "magic"); | |
543 | if (ret) { | |
544 | goto end; | |
545 | } | |
546 | ||
547 | ret = bt_ctf_field_type_structure_add_field(trace_packet_header_type, | |
548 | uuid_array_type, "uuid"); | |
549 | if (ret) { | |
550 | goto end; | |
551 | } | |
552 | ||
553 | ret = bt_ctf_field_type_structure_add_field(trace_packet_header_type, | |
554 | _uint32_t, "stream_id"); | |
555 | if (ret) { | |
556 | goto end; | |
557 | } | |
558 | ||
559 | trace_packet_header = bt_ctf_field_create(trace_packet_header_type); | |
560 | if (!trace_packet_header) { | |
561 | ret = -1; | |
562 | goto end; | |
563 | } | |
564 | ||
565 | magic = bt_ctf_field_structure_get_field(trace_packet_header, "magic"); | |
566 | ret = bt_ctf_field_unsigned_integer_set_value(magic, 0xC1FC1FC1); | |
567 | if (ret) { | |
568 | goto end; | |
569 | } | |
570 | ||
571 | uuid_array = bt_ctf_field_structure_get_field(trace_packet_header, | |
572 | "uuid"); | |
573 | for (i = 0; i < 16; i++) { | |
574 | struct bt_ctf_field *uuid_element = | |
575 | bt_ctf_field_array_get_field(uuid_array, i); | |
576 | ret = bt_ctf_field_unsigned_integer_set_value(uuid_element, | |
577 | trace->uuid[i]); | |
578 | bt_ctf_field_put(uuid_element); | |
579 | if (ret) { | |
580 | goto end; | |
581 | } | |
582 | } | |
583 | ||
584 | bt_ctf_field_type_put(trace->trace_packet_header_type); | |
585 | bt_ctf_field_put(trace->trace_packet_header); | |
586 | trace->trace_packet_header_type = trace_packet_header_type; | |
587 | trace->trace_packet_header = trace_packet_header; | |
588 | end: | |
589 | bt_ctf_field_type_put(uuid_array_type); | |
590 | bt_ctf_field_type_put(_uint32_t); | |
591 | bt_ctf_field_type_put(_uint8_t); | |
592 | bt_ctf_field_put(magic); | |
593 | bt_ctf_field_put(uuid_array); | |
594 | if (ret) { | |
595 | bt_ctf_field_type_put(trace_packet_header_type); | |
596 | bt_ctf_field_put(trace_packet_header); | |
597 | } | |
598 | ||
599 | return ret; | |
600 | } | |
601 | ||
602 | static | |
603 | void environment_variable_destroy(struct environment_variable *var) | |
604 | { | |
605 | g_string_free(var->name, TRUE); | |
606 | g_string_free(var->value, TRUE); | |
607 | g_free(var); | |
608 | } | |
609 | ||
610 | static __attribute__((constructor)) | |
611 | void trace_init(void) | |
612 | { | |
613 | size_t i; | |
614 | const size_t reserved_keywords_count = | |
615 | sizeof(reserved_keywords_str) / sizeof(char *); | |
616 | ||
617 | global_data_refcount++; | |
618 | if (init_done) { | |
619 | return; | |
620 | } | |
621 | ||
622 | reserved_keywords_set = g_hash_table_new(g_direct_hash, g_direct_equal); | |
623 | for (i = 0; i < reserved_keywords_count; i++) { | |
624 | gpointer quark = GINT_TO_POINTER(g_quark_from_string( | |
625 | reserved_keywords_str[i])); | |
626 | ||
627 | g_hash_table_insert(reserved_keywords_set, quark, quark); | |
628 | } | |
629 | ||
630 | init_done = 1; | |
631 | } | |
632 | ||
633 | static __attribute__((destructor)) | |
634 | void trace_finalize(void) | |
635 | { | |
636 | if (--global_data_refcount == 0) { | |
637 | g_hash_table_destroy(reserved_keywords_set); | |
638 | } | |
639 | } |