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