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genevent for userspace generic
[lttv.git] / genevent-new / genevent.c
1 /******************************************************************************
2 * Genevent
3 *
4 * Event generator. XML to logging C code converter.
5 *
6 * Program parameters :
7 * ./genevent name.xml
8 *
9 * Will generate ltt-facility-name.h, ltt-facility-id-name.h
10 * ltt-facility-loader-name.c, ltt-facility-loader-name.h
11 * in the current directory.
12 *
13 * Supports :
14 * - C Alignment
15 * - C types : struct, union, enum, basic types.
16 * - Architectures : LP32, ILP32, ILP64, LLP64, LP64.
17 *
18 * Additionnal structures supported :
19 * - embedded variable size strings
20 * - embedded variable size arrays
21 * - embedded variable size sequences
22 *
23 * Notes :
24 * (1)
25 * enums are limited to integer type, as this is what is used in C. Note,
26 * however, that ISO/IEC 9899:TC2 specify that the type of enum can be char,
27 * unsigned int or int. This is implementation defined (compiler). That's why we
28 * add a check for sizeof enum.
29 *
30 * (2)
31 * Because of archtecture defined type sizes, we need to ask for ltt_align
32 * (which gives the alignment) by passing basic types, not their actual sizes.
33 * It's up to ltt_align to determine sizes of types.
34 *
35 * Note that, from
36 * http://www.usenix.org/publications/login/standards/10.data.html
37 * (Andrew Josey <a.josey@opengroup.org>) :
38 *
39 * Data Type LP32 ILP32 ILP64 LLP64 LP64
40 * char 8 8 8 8 8
41 * short 16 16 16 16 16
42 * int32 32
43 * int 16 32 64 32 32
44 * long 32 32 64 32 64
45 * long long (int64) 64
46 * pointer 32 32 64 64 64
47 *
48 * With these constraints :
49 * sizeof(char) <= sizeof(short) <= sizeof(int)
50 * <= sizeof(long) = sizeof(size_t)
51 *
52 * and therefore sizeof(long) <= sizeof(pointer) <= sizeof(size_t)
53 *
54 * Which means we only have to remember which is the biggest type in a structure
55 * to know the structure's alignment.
56 */
57
58 #define _GNU_SOURCE
59 #include <limits.h>
60 #include <stdlib.h>
61 #include <errno.h>
62 #include <sys/types.h>
63 #include <sys/stat.h>
64 #include <fcntl.h>
65 #include <stdio.h>
66 #include <string.h>
67 #include <unistd.h>
68 #include <assert.h>
69
70 #include "genevent.h"
71 #include "parser.h"
72
73
74 #define TRUE 1
75 #define FALSE (!TRUE)
76
77 /* Debugging printf */
78 #ifdef DEBUG
79 #define dprintf(...) \
80 do {\
81 printf(__FILE__ ",%u,%s: ",\
82 __LINE__, __func__);\
83 printf(__VA_ARGS__);\
84 } while(0)
85 #else
86 #define dprintf(...)
87 #endif
88
89 /* Code printing */
90
91 void print_tabs(unsigned int tabs, FILE *fd)
92 {
93 for(unsigned int i = 0; i<tabs;i++)
94 fprintf(fd, "\t");
95 }
96
97 /* print type.
98 *
99 * Copied from construct_types_and_fields in LTTV facility.c */
100
101 int print_type(type_descriptor_t * td, FILE *fd, unsigned int tabs,
102 char *nest_name, char *field_name)
103 {
104 char basename[PATH_MAX];
105 unsigned int basename_len = 0;
106
107 strcpy(basename, nest_name);
108 basename_len = strlen(basename);
109
110 /* For a named type, we use the type_name directly */
111 if(td->type_name != NULL) {
112 strncpy(basename, td->type_name, PATH_MAX);
113 basename_len = strlen(basename);
114 } else {
115 /* For a unnamed type, there must be a field name */
116 if((basename_len != 0)
117 && (basename[basename_len-1] != '_')
118 && (field_name[0] != '\0')) {
119 strncat(basename, "_", PATH_MAX - basename_len);
120 basename_len = strlen(basename);
121 }
122 strncat(basename, field_name, PATH_MAX - basename_len);
123 }
124
125 switch(td->type) {
126 case INT_FIXED:
127 fprintf(fd, "%s", intOutputTypes[getSizeindex(td->size)]);
128 break;
129 case UINT_FIXED:
130 fprintf(fd, "%s", uintOutputTypes[getSizeindex(td->size)]);
131 break;
132 case CHAR:
133 fprintf(fd, "signed char");
134 break;
135 case UCHAR:
136 fprintf(fd, "unsigned char");
137 break;
138 case SHORT:
139 fprintf(fd, "short");
140 break;
141 case USHORT:
142 fprintf(fd, "unsigned short");
143 break;
144 case INT:
145 fprintf(fd, "int");
146 break;
147 case UINT:
148 fprintf(fd, "unsigned int");
149 break;
150 case FLOAT:
151 fprintf(fd, "%s", floatOutputTypes[getSizeindex(td->size)]);
152 break;
153 case POINTER:
154 fprintf(fd, "const void *");
155 break;
156 case LONG:
157 fprintf(fd, "long");
158 break;
159 case ULONG:
160 fprintf(fd, "unsigned long");
161 break;
162 case SIZE_T:
163 fprintf(fd, "size_t");
164 break;
165 case SSIZE_T:
166 fprintf(fd, "ssize_t");
167 break;
168 case OFF_T:
169 fprintf(fd, "off_t");
170 break;
171 case STRING:
172 fprintf(fd, "const char *");
173 break;
174 case ENUM:
175 fprintf(fd, "enum lttng_%s", basename);
176 break;
177 case ARRAY:
178 fprintf(fd, "lttng_array_%s", basename);
179 break;
180 case SEQUENCE:
181 fprintf(fd, "lttng_sequence_%s", basename);
182 break;
183 case STRUCT:
184 fprintf(fd, "struct lttng_%s", basename);
185 break;
186 case UNION:
187 fprintf(fd, "union lttng_%s", basename);
188 break;
189 default:
190 printf("print_type : unknown type\n");
191 return 1;
192 }
193
194 return 0;
195 }
196
197 /* Print logging function argument */
198 int print_arg(type_descriptor_t * td, FILE *fd, unsigned int tabs,
199 char *nest_name, char *field_name)
200 {
201 char basename[PATH_MAX];
202 unsigned int basename_len = 0;
203
204 strcpy(basename, nest_name);
205 basename_len = strlen(basename);
206
207 /* For a named type, we use the type_name directly */
208 if(td->type_name != NULL) {
209 strncpy(basename, td->type_name, PATH_MAX);
210 basename_len = strlen(basename);
211 } else {
212 /* For a unnamed type, there must be a field name */
213 if((basename_len != 0)
214 && (basename[basename_len-1] != '_')
215 && (field_name[0] != '\0')) {
216 strncat(basename, "_", PATH_MAX - basename_len);
217 basename_len = strlen(basename);
218 }
219 strncat(basename, field_name, PATH_MAX - basename_len);
220 }
221
222 print_tabs(tabs, fd);
223
224 switch(td->type) {
225 case INT_FIXED:
226 fprintf(fd, "%s", intOutputTypes[getSizeindex(td->size)]);
227 fprintf(fd, "lttng_param_%s", field_name);
228 break;
229 case UINT_FIXED:
230 fprintf(fd, "%s", uintOutputTypes[getSizeindex(td->size)]);
231 fprintf(fd, "lttng_param_%s", field_name);
232 break;
233 case CHAR:
234 fprintf(fd, "signed char");
235 fprintf(fd, " lttng_param_%s", field_name);
236 break;
237 case UCHAR:
238 fprintf(fd, "unsigned char");
239 fprintf(fd, " lttng_param_%s", field_name);
240 break;
241 case SHORT:
242 fprintf(fd, "short");
243 fprintf(fd, " lttng_param_%s", field_name);
244 break;
245 case USHORT:
246 fprintf(fd, "unsigned short");
247 fprintf(fd, " lttng_param_%s", field_name);
248 break;
249 case INT:
250 fprintf(fd, "int");
251 fprintf(fd, " lttng_param_%s", field_name);
252 break;
253 case UINT:
254 fprintf(fd, "unsigned int");
255 fprintf(fd, " lttng_param_%s", field_name);
256 break;
257 case FLOAT:
258 fprintf(fd, "%s", floatOutputTypes[getSizeindex(td->size)]);
259 fprintf(fd, " lttng_param_%s", field_name);
260 break;
261 case POINTER:
262 fprintf(fd, "const void *");
263 fprintf(fd, " lttng_param_%s", field_name);
264 break;
265 case LONG:
266 fprintf(fd, "long");
267 fprintf(fd, " lttng_param_%s", field_name);
268 break;
269 case ULONG:
270 fprintf(fd, "unsigned long");
271 fprintf(fd, " lttng_param_%s", field_name);
272 break;
273 case SIZE_T:
274 fprintf(fd, "size_t");
275 fprintf(fd, " lttng_param_%s", field_name);
276 break;
277 case SSIZE_T:
278 fprintf(fd, "ssize_t");
279 fprintf(fd, " lttng_param_%s", field_name);
280 break;
281 case OFF_T:
282 fprintf(fd, "off_t");
283 fprintf(fd, " lttng_param_%s", field_name);
284 break;
285 case STRING:
286 fprintf(fd, "const char *");
287 fprintf(fd, " lttng_param_%s", field_name);
288 break;
289 case ENUM:
290 fprintf(fd, "enum lttng_%s", basename);
291 fprintf(fd, " lttng_param_%s", field_name);
292 break;
293 case ARRAY:
294 fprintf(fd, "lttng_array_%s", basename);
295 fprintf(fd, " lttng_param_%s", field_name);
296 break;
297 case SEQUENCE:
298 fprintf(fd, "lttng_sequence_%s *", basename);
299 fprintf(fd, " lttng_param_%s", field_name);
300 break;
301 case STRUCT:
302 fprintf(fd, "struct lttng_%s *", basename);
303 fprintf(fd, " lttng_param_%s", field_name);
304 break;
305 case UNION:
306 fprintf(fd, "union lttng_%s *", basename);
307 fprintf(fd, " lttng_param_%s", field_name);
308 break;
309 default:
310 printf("print_type : unknown type\n");
311 return 1;
312 }
313
314 return 0;
315 }
316
317
318 /* Does the type has a fixed size ? (as know from the compiler)
319 *
320 * 1 : fixed size
321 * 0 : variable length
322 */
323 int has_type_fixed_size(type_descriptor_t *td)
324 {
325 switch(td->type) {
326 case INT_FIXED:
327 case UINT_FIXED:
328 case CHAR:
329 case UCHAR:
330 case SHORT:
331 case USHORT:
332 case INT:
333 case UINT:
334 case FLOAT:
335 case POINTER:
336 case LONG:
337 case ULONG:
338 case SIZE_T:
339 case SSIZE_T:
340 case OFF_T:
341 case ENUM:
342 case UNION: /* The union must have fixed size children. Must be checked by
343 the parser */
344 return 1;
345 break;
346 case STRING:
347 case SEQUENCE:
348 return 0;
349 break;
350 case STRUCT:
351 {
352 int has_type_fixed = 0;
353 for(unsigned int i=0;i<td->fields.position;i++){
354 field_t *field = (field_t*)(td->fields.array[i]);
355 type_descriptor_t *type = field->type;
356
357 has_type_fixed = has_type_fixed_size(type);
358 if(!has_type_fixed) return 0;
359 }
360 return 1;
361 }
362 break;
363 case ARRAY:
364 assert(td->size >= 0);
365 return has_type_fixed_size(((field_t*)td->fields.array[0])->type);
366 break;
367 case NONE:
368 printf("There is a type defined to NONE : bad.\n");
369 assert(0);
370 break;
371 }
372 return 0; //make gcc happy.
373 }
374
375
376
377
378
379 /* print type declaration.
380 *
381 * Copied from construct_types_and_fields in LTTV facility.c */
382
383 int print_type_declaration(type_descriptor_t * td, FILE *fd, unsigned int tabs,
384 char *nest_name, char *field_name)
385 {
386 char basename[PATH_MAX];
387 unsigned int basename_len = 0;
388
389 if(td->custom_write) return 0; /* Does print custom type */
390
391 strncpy(basename, nest_name, PATH_MAX);
392 basename_len = strlen(basename);
393
394 /* For a named type, we use the type_name directly */
395 if(td->type_name != NULL) {
396 strncpy(basename, td->type_name, PATH_MAX);
397 basename_len = strlen(basename);
398 } else {
399 /* For a unnamed type, there must be a field name, except for
400 * the array. */
401 if((basename_len != 0)
402 && (basename[basename_len-1] != '_'
403 && (field_name[0] != '\0'))) {
404 strncat(basename, "_", PATH_MAX - basename_len);
405 basename_len = strlen(basename);
406 }
407 strncat(basename, field_name, PATH_MAX - basename_len);
408 }
409
410 switch(td->type) {
411 case ENUM:
412 fprintf(fd, "enum lttng_%s", basename);
413 fprintf(fd, " {\n");
414 for(unsigned int i=0;i<td->labels.position;i++){
415 print_tabs(1, fd);
416 fprintf(fd, "LTTNG_%s = %d", ((char*)td->labels.array[i]),
417 (*(int*)td->labels_values.array[i]));
418 fprintf(fd, ",\n");
419 }
420 fprintf(fd, "};\n");
421 fprintf(fd, "\n");
422 break;
423
424 case ARRAY:
425 dprintf("%s\n", basename);
426 assert(td->size >= 0);
427 if(((field_t*)td->fields.array[0])->type->type_name == NULL) {
428 /* Not a named nested type : we must print its declaration first */
429 if(print_type_declaration(((field_t*)td->fields.array[0])->type,
430 fd, 0, basename, "")) return 1;
431 }
432 fprintf(fd, "#define LTTNG_ARRAY_SIZE_%s %zu\n", basename,
433 td->size);
434 fprintf(fd, "typedef ");
435 if(print_type(((field_t*)td->fields.array[0])->type,
436 fd, tabs, basename, "")) return 1;
437 fprintf(fd, " lttng_array_%s[LTTNG_ARRAY_SIZE_%s];\n", basename,
438 basename);
439 fprintf(fd, "\n");
440 break;
441 case SEQUENCE:
442 /* We assume that the sequence length type does not need to be declared.
443 */
444 if(((field_t*)td->fields.array[1])->type->type_name == NULL) {
445 /* Not a named nested type : we must print its declaration first */
446 if(print_type_declaration(((field_t*)td->fields.array[1])->type,
447 fd, 0, basename, "")) return 1;
448 }
449 fprintf(fd, "typedef struct lttng_sequence_%s lttng_sequence_%s;\n",
450 basename,
451 basename);
452 fprintf(fd, "struct lttng_sequence_%s", basename);
453 fprintf(fd, " {\n");
454 print_tabs(1, fd);
455 if(print_type(((field_t*)td->fields.array[0])->type,
456 fd, tabs, basename, "")) return 1;
457 fprintf(fd, " len;\n");
458 print_tabs(1, fd);
459 fprintf(fd, "const ");
460 if(print_type(((field_t*)td->fields.array[1])->type,
461 fd, tabs, basename, "")) return 1;
462 fprintf(fd, " *array;\n");
463 fprintf(fd, "};\n"); /* We do not LTT_ALIGN, because we never copy
464 it to the buffer directly. */
465 fprintf(fd, "\n");
466 break;
467
468 case STRUCT:
469 for(unsigned int i=0;i<td->fields.position;i++){
470 field_t *field = (field_t*)(td->fields.array[i]);
471 type_descriptor_t *type = field->type;
472 if(type->type_name == NULL) {
473 /* Not a named nested type : we must print its declaration first */
474 if(print_type_declaration(type,
475 fd, 0, basename, field->name)) return 1;
476 }
477 }
478 fprintf(fd, "struct lttng_%s", basename);
479 fprintf(fd, " {\n");
480 for(unsigned int i=0;i<td->fields.position;i++){
481 field_t *field = (field_t*)(td->fields.array[i]);
482 type_descriptor_t *type = field->type;
483 print_tabs(1, fd);
484 if(print_type(type, fd, tabs, basename, field->name)) return 1;
485 fprintf(fd, " ");
486 fprintf(fd, "%s", field->name);
487 fprintf(fd, ";\n");
488 }
489 fprintf(fd, "} LTT_ALIGN;\n");
490 fprintf(fd, "\n");
491 break;
492 case UNION:
493 for(unsigned int i=0;i<td->fields.position;i++){
494 field_t *field = (field_t*)(td->fields.array[i]);
495 type_descriptor_t *type = field->type;
496 if(type->type_name == NULL) {
497 /* Not a named nested type : we must print its declaration first */
498 if(print_type_declaration(type,
499 fd, 0, basename, field->name)) return 1;
500 }
501 }
502 fprintf(fd, "union lttng_%s", basename);
503 fprintf(fd, " {\n");
504 for(unsigned i=0;i<td->fields.position;i++){
505 field_t *field = (field_t*)(td->fields.array[i]);
506 type_descriptor_t *type = field->type;
507 print_tabs(1, fd);
508 if(print_type(type, fd, tabs, basename, field->name)) return 1;
509 fprintf(fd, " ");
510 fprintf(fd, "%s", field->name);
511 fprintf(fd, ";\n");
512 }
513 fprintf(fd, "} LTT_ALIGN;\n");
514 fprintf(fd, "\n");
515 break;
516 default:
517 dprintf("print_type_declaration : unknown type or nothing to declare.\n");
518 break;
519 }
520
521 return 0;
522 }
523
524
525 /* print type alignment.
526 *
527 * Copied from construct_types_and_fields in LTTV facility.c
528 *
529 * basename is the name which identifies the type (along with a prefix
530 * (possibly)). */
531
532 int print_type_alignment(type_descriptor_t * td, FILE *fd, unsigned int tabs,
533 char *nest_name, char *field_name, char *obj_prefix)
534 {
535 char basename[PATH_MAX];
536 unsigned int basename_len = 0;
537
538 strncpy(basename, nest_name, PATH_MAX);
539 basename_len = strlen(basename);
540
541 /* For a named type, we use the type_name directly */
542 if(td->type_name != NULL) {
543 strncpy(basename, td->type_name, PATH_MAX);
544 basename_len = strlen(basename);
545 } else {
546 /* For a unnamed type, there must be a field name, except for
547 * the array. */
548 if((basename_len != 0)
549 && (basename[basename_len-1] != '_'
550 && field_name != NULL
551 && (field_name[0] != '\0'))) {
552 strncat(basename, "_", PATH_MAX - basename_len);
553 basename_len = strlen(basename);
554 }
555 if(field_name != NULL)
556 strncat(basename, field_name, PATH_MAX - basename_len);
557 }
558
559 if(field_name[0] == '\0') {
560 /* We are in a write function : it's the obj that we must align. */
561 switch(td->type) {
562 case SEQUENCE:
563 fprintf(fd, "lttng_get_alignment_sequence_%s(%s)", basename,
564 obj_prefix);
565 break;
566 case STRUCT:
567 fprintf(fd, "lttng_get_alignment_struct_%s(%s)", basename,
568 obj_prefix);
569 break;
570 case UNION:
571 fprintf(fd, "lttng_get_alignment_union_%s(%s)", basename,
572 obj_prefix);
573 break;
574 case ARRAY:
575 fprintf(fd, "lttng_get_alignment_array_%s(%s)", basename,
576 obj_prefix);
577 case STRING:
578 fprintf(fd, "sizeof(char)");
579 break;
580 case INT_FIXED:
581 case UINT_FIXED:
582 case CHAR:
583 case UCHAR:
584 case SHORT:
585 case USHORT:
586 case INT:
587 case UINT:
588 case FLOAT:
589 case POINTER:
590 case LONG:
591 case ULONG:
592 case SIZE_T:
593 case SSIZE_T:
594 case OFF_T:
595 case ENUM:
596 fprintf(fd, "sizeof(");
597 if(print_type(td, fd, 0, basename, "")) return 1;
598 fprintf(fd, ")");
599 break;
600
601 default:
602 printf("error : type unexpected\n");
603 return 1;
604 break;
605 }
606 } else {
607
608 switch(td->type) {
609 case INT_FIXED:
610 case UINT_FIXED:
611 case CHAR:
612 case UCHAR:
613 case SHORT:
614 case USHORT:
615 case INT:
616 case UINT:
617 case FLOAT:
618 case POINTER:
619 case LONG:
620 case ULONG:
621 case SIZE_T:
622 case SSIZE_T:
623 case OFF_T:
624 case ENUM:
625 fprintf(fd, "sizeof(");
626 if(print_type(td, fd, 0, basename, "")) return 1;
627 fprintf(fd, ")");
628 break;
629 case STRING:
630 fprintf(fd, "sizeof(char)");
631 break;
632 case SEQUENCE:
633 fprintf(fd, "lttng_get_alignment_sequence_%s(&%s%s)", basename,
634 obj_prefix, field_name);
635 break;
636 case STRUCT:
637 fprintf(fd, "lttng_get_alignment_struct_%s(&%s%s)", basename,
638 obj_prefix, field_name);
639 break;
640 case UNION:
641 fprintf(fd, "lttng_get_alignment_union_%s(&%s%s)", basename,
642 obj_prefix, field_name);
643 break;
644 case ARRAY:
645 fprintf(fd, "lttng_get_alignment_array_%s(%s%s)", basename,
646 obj_prefix, field_name);
647 break;
648 case NONE:
649 printf("error : type NONE unexpected\n");
650 return 1;
651 break;
652 }
653 }
654
655 return 0;
656 }
657
658 /* print type write.
659 *
660 * Copied from construct_types_and_fields in LTTV facility.c
661 *
662 * basename is the name which identifies the type (along with a prefix
663 * (possibly)). */
664
665 int print_type_write(type_descriptor_t * td, FILE *fd, unsigned int tabs,
666 char *nest_name, char *field_name, char *obj_prefix, int get_ptr)
667 {
668 char basename[PATH_MAX];
669 unsigned int basename_len = 0;
670 char get_ptr_char[2] = "";
671 char custom[PATH_MAX] = "";
672
673 strncpy(basename, nest_name, PATH_MAX);
674 basename_len = strlen(basename);
675
676 /* For a named type, we use the type_name directly */
677 if(td->type_name != NULL) {
678 strncpy(basename, td->type_name, PATH_MAX);
679 basename_len = strlen(basename);
680 } else {
681 /* For a unnamed type, there must be a field name, except for
682 * the array. */
683 if((basename_len != 0)
684 && (basename[basename_len-1] != '_'
685 && (field_name[0] != '\0'))) {
686 strncat(basename, "_", PATH_MAX - basename_len);
687 basename_len = strlen(basename);
688 }
689 strncat(basename, field_name, PATH_MAX - basename_len);
690 }
691
692 if(get_ptr) {
693 strcpy(get_ptr_char, "&");
694 }
695
696 if(td->custom_write) {
697 strcpy(custom, "_custom");
698 }
699
700 switch(td->type) {
701 case INT_FIXED:
702 case UINT_FIXED:
703 case CHAR:
704 case UCHAR:
705 case SHORT:
706 case USHORT:
707 case INT:
708 case UINT:
709 case FLOAT:
710 case POINTER:
711 case LONG:
712 case ULONG:
713 case SIZE_T:
714 case SSIZE_T:
715 case OFF_T:
716 case ENUM:
717 print_tabs(tabs, fd);
718 fprintf(fd, "align = ");
719 if(print_type_alignment(td, fd, 0, basename, "", "obj")) return 1;
720 fprintf(fd, ";\n");
721 fprintf(fd, "\n");
722 print_tabs(tabs, fd);
723 fprintf(fd, "if(*len == 0) {\n");
724 print_tabs(tabs+1, fd);
725 fprintf(fd, "*to += ltt_align(*to, align); /* align output */\n");
726 print_tabs(tabs, fd);
727 fprintf(fd, "} else {\n");
728 print_tabs(tabs+1, fd);
729 fprintf(fd, "*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */\n");
730 print_tabs(tabs, fd);
731 fprintf(fd, "}\n");
732 fprintf(fd, "\n");
733
734 print_tabs(tabs, fd);
735 fprintf(fd, "*len += ");
736 fprintf(fd, "sizeof(");
737 if(print_type(td, fd, 0, basename, "")) return 1;
738 fprintf(fd, ");\n");
739
740 break;
741 case STRING:
742 print_tabs(tabs, fd);
743 fprintf(fd,
744 "lttng_write%s_string_%s(buffer, to_base, to, from, len, %s%s);\n",
745 custom, basename, obj_prefix, field_name);
746 break;
747 case SEQUENCE:
748 print_tabs(tabs, fd);
749 fprintf(fd,
750 "lttng_write%s_sequence_%s(buffer, to_base, to, from, len, %s%s%s);",
751 custom, basename, get_ptr_char, obj_prefix, field_name);
752 break;
753 case STRUCT:
754 print_tabs(tabs, fd);
755 fprintf(fd,
756 "lttng_write%s_struct_%s(buffer, to_base, to, from, len, %s%s%s);",
757 custom, basename, get_ptr_char, obj_prefix, field_name);
758 break;
759 case UNION:
760 print_tabs(tabs, fd);
761 fprintf(fd,
762 "lttng_write%s_union_%s(buffer, to_base, to, from, len, %s%s%s);",
763 custom, basename, get_ptr_char, obj_prefix, field_name);
764 break;
765 case ARRAY:
766 print_tabs(tabs, fd);
767 fprintf(fd,
768 "lttng_write%s_array_%s(buffer, to_base, to, from, len, %s%s);",
769 custom, basename, obj_prefix, field_name);
770 break;
771 case NONE:
772 printf("Error : type NONE unexpected\n");
773 return 1;
774 break;
775 }
776
777 return 0;
778 }
779
780 /* print need local vars ?.
781 *
782 * Copied from print_type_write
783 *
784 * Does the type_write call needs local size and from variables ?
785 * return value : 1 yes, 0 no.
786 */
787
788 int has_type_local(type_descriptor_t * td)
789 {
790 switch(td->type) {
791 case INT_FIXED:
792 case UINT_FIXED:
793 case CHAR:
794 case UCHAR:
795 case SHORT:
796 case USHORT:
797 case INT:
798 case UINT:
799 case FLOAT:
800 case POINTER:
801 case LONG:
802 case ULONG:
803 case SIZE_T:
804 case SSIZE_T:
805 case OFF_T:
806 case ENUM:
807 return 1;
808 break;
809 case STRING:
810 case SEQUENCE:
811 case STRUCT:
812 case UNION:
813 case ARRAY:
814 return 0;
815 break;
816 case NONE:
817 printf("Error : type NONE unexpected\n");
818 return 1;
819 break;
820 }
821
822 return 0;
823 }
824
825
826
827 /* print type alignment function.
828 *
829 * Copied from construct_types_and_fields in LTTV facility.c
830 *
831 * basename is the name which identifies the type (along with a prefix
832 * (possibly)). */
833
834 int print_type_alignment_fct(type_descriptor_t * td, FILE *fd,
835 unsigned int tabs,
836 char *nest_name, char *field_name)
837 {
838 char basename[PATH_MAX];
839 unsigned int basename_len = 0;
840
841 if(td->custom_write) return 0; /* Does print custom type */
842
843 strncpy(basename, nest_name, PATH_MAX);
844 basename_len = strlen(basename);
845
846 /* For a named type, we use the type_name directly */
847 if(td->type_name != NULL) {
848 strncpy(basename, td->type_name, PATH_MAX);
849 basename_len = strlen(basename);
850 } else {
851 /* For a unnamed type, there must be a field name, except for
852 * the array. */
853 if((basename_len != 0)
854 && (basename[basename_len-1] != '_'
855 && (field_name[0] != '\0'))) {
856 strncat(basename, "_", PATH_MAX - basename_len);
857 basename_len = strlen(basename);
858 }
859 strncat(basename, field_name, PATH_MAX - basename_len);
860 }
861
862 switch(td->type) {
863 case SEQUENCE:
864 /* Function header */
865 fprintf(fd, "static inline size_t lttng_get_alignment_sequence_%s(\n",
866 basename);
867 print_tabs(2, fd);
868 if(print_type(td, fd, 0, basename, "")) return 1;
869 fprintf(fd, " *obj)\n");
870 fprintf(fd, "{\n");
871 print_tabs(1, fd);
872 fprintf(fd, "size_t align=0, localign;");
873 fprintf(fd, "\n");
874 print_tabs(1, fd);
875 fprintf(fd, "localign = ");
876 if(print_type_alignment(((field_t*)td->fields.array[0])->type,
877 fd, 0, basename, "len", "obj->")) return 1;
878 fprintf(fd, ";\n");
879 print_tabs(1, fd);
880 fprintf(fd, "align = max(align, localign);\n");
881 fprintf(fd, "\n");
882 print_tabs(1, fd);
883 fprintf(fd, "localign = ");
884 if(print_type_alignment(((field_t*)td->fields.array[1])->type,
885 fd, 0, basename, "array[0]", "obj->")) return 1;
886 fprintf(fd, ";\n");
887 print_tabs(1, fd);
888 fprintf(fd, "align = max(align, localign);\n");
889 fprintf(fd, "\n");
890 print_tabs(1, fd);
891 fprintf(fd, "return align;\n");
892 break;
893 case STRUCT:
894 /* Function header */
895 fprintf(fd, "static inline size_t lttng_get_alignment_struct_%s(\n",
896 basename);
897 print_tabs(2, fd);
898 if(print_type(td, fd, 0, basename, "")) return 1;
899 fprintf(fd, " *obj)\n");
900 fprintf(fd, "{\n");
901 print_tabs(1, fd);
902 fprintf(fd, "size_t align=0, localign;");
903 fprintf(fd, "\n");
904 for(unsigned int i=0;i<td->fields.position;i++){
905 field_t *field = (field_t*)(td->fields.array[i]);
906 type_descriptor_t *type = field->type;
907 print_tabs(1, fd);
908 fprintf(fd, "localign = ");
909 if(print_type_alignment(type, fd, 0, basename, field->name, "obj->"))
910 return 1;
911 fprintf(fd, ";\n");
912 print_tabs(1, fd);
913 fprintf(fd, "align = max(align, localign);\n");
914 fprintf(fd, "\n");
915 }
916 print_tabs(1, fd);
917 fprintf(fd, "return align;\n");
918
919 break;
920 case UNION:
921 /* Function header */
922 fprintf(fd, "static inline size_t lttng_get_alignment_union_%s(\n",
923 basename);
924 print_tabs(2, fd);
925 if(print_type(td, fd, 0, basename, "")) return 1;
926 fprintf(fd, " *obj)\n");
927 fprintf(fd, "{\n");
928 print_tabs(1, fd);
929 fprintf(fd, "size_t align=0, localign;");
930 fprintf(fd, "\n");
931 for(unsigned int i=0;i<td->fields.position;i++){
932 field_t *field = (field_t*)(td->fields.array[i]);
933 type_descriptor_t *type = field->type;
934 print_tabs(1, fd);
935 fprintf(fd, "localign = ");
936 if(print_type_alignment(type, fd, 0, basename, field->name, "obj->"))
937 return 1;
938 fprintf(fd, ";\n");
939 print_tabs(1, fd);
940 fprintf(fd, "align = max(align, localign);\n");
941 fprintf(fd, "\n");
942 }
943 print_tabs(1, fd);
944 fprintf(fd, "return align;\n");
945
946 break;
947 case ARRAY:
948 /* Function header */
949 fprintf(fd, "static inline size_t lttng_get_alignment_array_%s(\n",
950 basename);
951 print_tabs(2, fd);
952 if(print_type(td, fd, 0, basename, "")) return 1;
953 fprintf(fd, " obj)\n");
954 fprintf(fd, "{\n");
955 print_tabs(1, fd);
956 fprintf(fd, "return \n");
957 if(print_type_alignment(((field_t*)td->fields.array[0])->type,
958 fd, 0, basename, "", "obj[0]"))
959 return 1;
960 fprintf(fd, ";\n");
961 break;
962 default:
963 dprintf("print_type_alignment_fct : type has no alignment function.\n");
964 return 0;
965 break;
966 }
967
968
969 /* Function footer */
970 fprintf(fd, "}\n");
971 fprintf(fd, "\n");
972
973 return 0;
974 }
975
976 /* print type write function.
977 *
978 * Copied from construct_types_and_fields in LTTV facility.c
979 *
980 * basename is the name which identifies the type (along with a prefix
981 * (possibly)). */
982
983 int print_type_write_fct(type_descriptor_t * td, FILE *fd, unsigned int tabs,
984 char *nest_name, char *field_name)
985 {
986 char basename[PATH_MAX];
987 unsigned int basename_len = 0;
988
989 if(td->custom_write) return 0; /* Does print custom type */
990
991 strncpy(basename, nest_name, PATH_MAX);
992 basename_len = strlen(basename);
993
994 /* For a named type, we use the type_name directly */
995 if(td->type_name != NULL) {
996 strncpy(basename, td->type_name, PATH_MAX);
997 basename_len = strlen(basename);
998 } else {
999 /* For a unnamed type, there must be a field name, except for
1000 * the array. */
1001 if((basename_len != 0)
1002 && (basename[basename_len-1] != '_'
1003 && (field_name[0] != '\0'))) {
1004 strncat(basename, "_", PATH_MAX - basename_len);
1005 basename_len = strlen(basename);
1006 }
1007 strncat(basename, field_name, PATH_MAX - basename_len);
1008 }
1009
1010 switch(td->type) {
1011 case SEQUENCE:
1012 case STRUCT:
1013 case UNION:
1014 case ARRAY:
1015 case STRING:
1016 break;
1017 default:
1018 dprintf("print_type_write_fct : type has no write function.\n");
1019 return 0;
1020 break;
1021 }
1022
1023 /* Print header */
1024 switch(td->type) {
1025 case SEQUENCE:
1026 fprintf(fd, "static inline void lttng_write_sequence_%s(\n",
1027 basename);
1028 break;
1029 case STRUCT:
1030 fprintf(fd, "static inline void lttng_write_struct_%s(\n", basename);
1031 break;
1032 case UNION:
1033 fprintf(fd, "static inline void lttng_write_union_%s(\n", basename);
1034 break;
1035 case ARRAY:
1036 fprintf(fd, "static inline void lttng_write_array_%s(\n", basename);
1037 break;
1038 case STRING:
1039 fprintf(fd, "static inline void lttng_write_string_%s(\n", basename);
1040 break;
1041 default:
1042 printf("print_type_write_fct : type has no write function.\n");
1043 break;
1044 }
1045
1046 print_tabs(2, fd);
1047 fprintf(fd, "void *buffer,\n");
1048 print_tabs(2, fd);
1049 fprintf(fd, "size_t *to_base,\n");
1050 print_tabs(2, fd);
1051 fprintf(fd, "size_t *to,\n");
1052 print_tabs(2, fd);
1053 fprintf(fd, "const void **from,\n");
1054 print_tabs(2, fd);
1055 fprintf(fd, "size_t *len,\n");
1056 print_tabs(2, fd);
1057 if(print_type(td, fd, 0, basename, "")) return 1;
1058
1059 switch(td->type) {
1060 case SEQUENCE:
1061 fprintf(fd, " *obj)\n");
1062 break;
1063 case STRUCT:
1064 fprintf(fd, " *obj)\n");
1065 break;
1066 case UNION:
1067 fprintf(fd, " *obj)\n");
1068 break;
1069 case ARRAY:
1070 fprintf(fd, " obj)\n");
1071 break;
1072 case STRING:
1073 fprintf(fd, " obj)\n");
1074 break;
1075 default:
1076 printf("print_type_write_fct : type has no write function.\n");
1077 break;
1078 }
1079
1080 fprintf(fd, "{\n");
1081
1082 switch(td->type) {
1083 case STRING:
1084 print_tabs(1, fd);
1085 fprintf(fd, "size_t size;\n");
1086 break;
1087 default:
1088 break;
1089 }
1090
1091 print_tabs(1, fd);
1092 fprintf(fd, "size_t align;\n");
1093 fprintf(fd, "\n");
1094
1095 switch(td->type) {
1096 case SEQUENCE:
1097 case STRING:
1098 print_tabs(1, fd);
1099 fprintf(fd, "/* Flush pending memcpy */\n");
1100 print_tabs(1, fd);
1101 fprintf(fd, "if(*len != 0) {\n");
1102 print_tabs(2, fd);
1103 fprintf(fd, "if(buffer != NULL)\n");
1104 print_tabs(3, fd);
1105 fprintf(fd, "memcpy(buffer+*to_base+*to, *from, *len);\n");
1106 print_tabs(1, fd);
1107 fprintf(fd, "}\n");
1108 print_tabs(1, fd);
1109 fprintf(fd, "*to += *len;\n");
1110 print_tabs(1, fd);
1111 fprintf(fd, "*len = 0;\n");
1112 fprintf(fd, "\n");
1113 break;
1114 case STRUCT:
1115 case UNION:
1116 case ARRAY:
1117 break;
1118 default:
1119 printf("print_type_write_fct : type has no write function.\n");
1120 break;
1121 }
1122
1123 print_tabs(1, fd);
1124 fprintf(fd, "align = ");
1125 if(print_type_alignment(td, fd, 0, basename, "", "obj")) return 1;
1126 fprintf(fd, ";\n");
1127 fprintf(fd, "\n");
1128 print_tabs(1, fd);
1129 fprintf(fd, "if(*len == 0) {\n");
1130 print_tabs(2, fd);
1131 fprintf(fd, "*to += ltt_align(*to, align); /* align output */\n");
1132 print_tabs(1, fd);
1133 fprintf(fd, "} else {\n");
1134 print_tabs(2, fd);
1135 fprintf(fd, "*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */\n");
1136 print_tabs(1, fd);
1137 fprintf(fd, "}\n");
1138 fprintf(fd, "\n");
1139
1140 /* First, check if the type has a fixed size. If it is the case, then the size
1141 * to write is know by the compiler : simply use a sizeof() */
1142 if(has_type_fixed_size(td)) {
1143 print_tabs(1, fd);
1144 fprintf(fd, "/* Contains only fixed size fields : use compiler sizeof() */\n");
1145 fprintf(fd, "\n");
1146 print_tabs(1, fd);
1147 fprintf(fd, "*len += sizeof(");
1148 if(print_type(td, fd, 0, basename, field_name)) return 1;
1149 fprintf(fd, ");\n");
1150 } else {
1151 /* The type contains nested variable size subtypes :
1152 * we must write field by field. */
1153 print_tabs(1, fd);
1154 fprintf(fd, "/* Contains variable sized fields : must explode the structure */\n");
1155 fprintf(fd, "\n");
1156
1157 switch(td->type) {
1158 case SEQUENCE:
1159 print_tabs(1, fd);
1160 fprintf(fd, "/* Copy members */\n");
1161 // print_tabs(1, fd);
1162 // fprintf(fd, "size = sizeof(\n");
1163 if(print_type_write(((field_t*)td->fields.array[0])->type,
1164 fd, 1, basename, "len", "obj->", 1)) return 1;
1165 fprintf(fd, "\n");
1166 // fprintf(fd, ");\n");
1167 // print_tabs(1, fd);
1168 // fprintf(fd, "*to += ltt_align(*to, size);\n");
1169 print_tabs(1, fd);
1170 fprintf(fd, "if(buffer != NULL)\n");
1171 print_tabs(2, fd);
1172 fprintf(fd, "memcpy(buffer+*to_base+*to, &obj->len, *len);\n");
1173 print_tabs(1, fd);
1174 fprintf(fd, "*to += *len;\n");
1175 print_tabs(1, fd);
1176 fprintf(fd, "*len = 0;\n");
1177 fprintf(fd, "\n");
1178
1179 /* Write the child : varlen child or not ? */
1180 if(has_type_fixed_size(((field_t*)td->fields.array[1])->type)) {
1181 /* Fixed size len child : use a multiplication of its size */
1182 // print_tabs(1, fd);
1183 // fprintf(fd, "size = sizeof(\n");
1184
1185 //print_tabs(1, fd);
1186 /* We know that *len does not contain alignment because of the
1187 * previous align output. len is always 0 here. */
1188 if(print_type_write(((field_t*)td->fields.array[1])->type,
1189 fd, 1, basename, "array[0]", "obj->", 1))
1190 return 1;
1191 // fprintf(fd, ");\n");
1192 fprintf(fd, "\n");
1193 print_tabs(1, fd);
1194 fprintf(fd, "*len = obj->len * (*len);\n");
1195 print_tabs(1, fd);
1196 fprintf(fd, "if(buffer != NULL)\n");
1197 print_tabs(2, fd);
1198 fprintf(fd, "memcpy(buffer+*to_base+*to, obj->array, *len);\n");
1199 print_tabs(1, fd);
1200 fprintf(fd, "*to += *len;\n");
1201 print_tabs(1, fd);
1202 fprintf(fd, "*len = 0;\n");
1203 fprintf(fd, "\n");
1204 } else {
1205 print_tabs(1, fd);
1206 fprintf(fd, "/* Variable length child : iter. */\n");
1207 print_tabs(1, fd);
1208 fprintf(fd, "for(unsigned int i=0; i<obj->len; i++) {\n");
1209 if(print_type_write(((field_t*)td->fields.array[1])->type,
1210 fd, 2, basename, "array[i]", "obj->", 1)) return 1;
1211 print_tabs(1, fd);
1212 fprintf(fd, "}\n");
1213 }
1214 fprintf(fd, "\n");
1215 print_tabs(1, fd);
1216 fprintf(fd, "/* Realign the *to_base on arch size, set *to to 0 */\n");
1217 print_tabs(1, fd);
1218 fprintf(fd, "*to += ltt_align(*to, sizeof(void *));\n");
1219 print_tabs(1, fd);
1220 fprintf(fd, "*to_base = *to_base+*to;\n");
1221 print_tabs(1, fd);
1222 fprintf(fd, "*to = 0;\n");
1223 fprintf(fd, "\n");
1224 print_tabs(1, fd);
1225 fprintf(fd, "/* Put source *from just after the C sequence */\n");
1226 print_tabs(1, fd);
1227 fprintf(fd, "*from = obj+1;\n");
1228 break;
1229 case STRING:
1230 print_tabs(1, fd);
1231 fprintf(fd, "size = strlen(obj) + 1; /* Include final NULL char. */\n");
1232 print_tabs(1, fd);
1233 fprintf(fd, "if(buffer != NULL)\n");
1234 print_tabs(2, fd);
1235 fprintf(fd, "memcpy(buffer+*to_base+*to, obj, size);\n");
1236 print_tabs(1, fd);
1237 fprintf(fd, "*to += size;\n");
1238 fprintf(fd, "\n");
1239 print_tabs(1, fd);
1240 fprintf(fd, "/* Realign the *to_base on arch size, set *to to 0 */\n");
1241 print_tabs(1, fd);
1242 fprintf(fd, "*to += ltt_align(*to, sizeof(void *));\n");
1243 print_tabs(1, fd);
1244 fprintf(fd, "*to_base = *to_base+*to;\n");
1245 print_tabs(1, fd);
1246 fprintf(fd, "*to = 0;\n");
1247 fprintf(fd, "\n");
1248 print_tabs(1, fd);
1249 fprintf(fd, "/* Put source *from just after the C string */\n");
1250 print_tabs(1, fd);
1251 fprintf(fd, "*from += size;\n");
1252 break;
1253 case STRUCT:
1254 for(unsigned int i=0;i<td->fields.position;i++){
1255 field_t *field = (field_t*)(td->fields.array[i]);
1256 type_descriptor_t *type = field->type;
1257 if(print_type_write(type,
1258 fd, 1, basename, field->name, "obj->", 1)) return 1;
1259 fprintf(fd, "\n");
1260 }
1261 break;
1262 case UNION:
1263 printf("ERROR : A union CANNOT contain a variable size child.\n");
1264 return 1;
1265 break;
1266 case ARRAY:
1267 /* Write the child : varlen child or not ? */
1268 if(has_type_fixed_size(((field_t*)td->fields.array[0])->type)) {
1269 /* Error : if an array has a variable size, then its child must also
1270 * have a variable size. */
1271 assert(0);
1272 } else {
1273 print_tabs(1, fd);
1274 fprintf(fd, "/* Variable length child : iter. */\n");
1275 print_tabs(1, fd);
1276 fprintf(fd, "for(unsigned int i=0; i<LTTNG_ARRAY_SIZE_%s; i++) {\n", basename);
1277 if(print_type_write(((field_t*)td->fields.array[0])->type,
1278 fd, 2, basename, "", "obj->array[i]", 1)) return 1;
1279 print_tabs(1, fd);
1280 fprintf(fd, "}\n");
1281 }
1282 break;
1283 default:
1284 printf("print_type_write_fct : type has no write function.\n");
1285 break;
1286 }
1287
1288
1289 }
1290
1291
1292 /* Function footer */
1293 fprintf(fd, "}\n");
1294 fprintf(fd, "\n");
1295 return 0;
1296 }
1297
1298
1299
1300 /* Print the logging function of an event. This is the core of genevent */
1301 int print_event_logging_function(char *basename, facility_t *fac,
1302 event_t *event, FILE *fd)
1303 {
1304 fprintf(fd, "static inline void trace_%s(\n", basename);
1305 int has_argument = 0;
1306 int has_type_fixed = 0;
1307
1308 /* Does it support per trace tracing ? */
1309 if(event->per_trace) {
1310 print_tabs(2, fd);
1311 fprintf(fd, "struct ltt_trace_struct *dest_trace");
1312 has_argument = 1;
1313 }
1314
1315 /* Does it support per tracefile tracing ? */
1316 if(event->per_tracefile) {
1317 if(has_argument) {
1318 fprintf(fd, ",");
1319 fprintf(fd, "\n");
1320 }
1321 fprintf(fd, "unsigned int tracefile_index");
1322 has_argument = 1;
1323 }
1324
1325 for(unsigned int j = 0; j < event->fields.position; j++) {
1326 /* For each field, print the function argument */
1327 field_t *f = (field_t*)event->fields.array[j];
1328 type_descriptor_t *t = f->type;
1329 if(has_argument) {
1330 fprintf(fd, ",");
1331 fprintf(fd, "\n");
1332 }
1333 if(print_arg(t, fd, 2, basename, f->name)) return 1;
1334 has_argument = 1;
1335 }
1336 if(!has_argument) {
1337 print_tabs(2, fd);
1338 fprintf(fd, "void");
1339 }
1340 fprintf(fd,")\n");
1341 fprintf(fd,
1342 "#if (!defined(CONFIG_LTT) || !defined(CONFIG_LTT_FACILITY_%s))\n",
1343 fac->capname);
1344 fprintf(fd, "{\n");
1345 fprintf(fd, "}\n");
1346 fprintf(fd,"#else\n");
1347 fprintf(fd, "{\n");
1348 /* Print the function variables */
1349 print_tabs(1, fd);
1350 fprintf(fd, "unsigned int index;\n");
1351 print_tabs(1, fd);
1352 fprintf(fd, "struct ltt_channel_struct *channel;\n");
1353 print_tabs(1, fd);
1354 fprintf(fd, "struct ltt_trace_struct *trace;\n");
1355 print_tabs(1, fd);
1356 fprintf(fd, "struct rchan_buf *relayfs_buf;\n");
1357 print_tabs(1, fd);
1358 fprintf(fd, "void *buffer = NULL;\n");
1359 print_tabs(1, fd);
1360 fprintf(fd, "size_t real_to_base = 0; /* The buffer is allocated on arch_size alignment */\n");
1361 print_tabs(1, fd);
1362 fprintf(fd, "size_t *to_base = &real_to_base;\n");
1363 print_tabs(1, fd);
1364 fprintf(fd, "size_t real_to = 0;\n");
1365 print_tabs(1, fd);
1366 fprintf(fd, "size_t *to = &real_to;\n");
1367 print_tabs(1, fd);
1368 fprintf(fd, "size_t real_len = 0;\n");
1369 print_tabs(1, fd);
1370 fprintf(fd, "size_t *len = &real_len;\n");
1371 print_tabs(1, fd);
1372 fprintf(fd, "size_t reserve_size;\n");
1373 print_tabs(1, fd);
1374 fprintf(fd, "size_t slot_size;\n");
1375 print_tabs(1, fd);
1376
1377 if(event->fields.position > 0) {
1378 for(unsigned int i=0;i<event->fields.position;i++){
1379 /* Search for at least one child with fixed size. It means
1380 * we need local variables.*/
1381 field_t *field = (field_t*)(event->fields.array[i]);
1382 type_descriptor_t *type = field->type;
1383 has_type_fixed = has_type_local(type);
1384 if(has_type_fixed) break;
1385 }
1386
1387 if(has_type_fixed) {
1388 fprintf(fd, "size_t align;\n");
1389 print_tabs(1, fd);
1390 }
1391
1392 fprintf(fd, "const void *real_from;\n");
1393 print_tabs(1, fd);
1394 fprintf(fd, "const void **from = &real_from;\n");
1395 print_tabs(1, fd);
1396 }
1397 fprintf(fd, "u64 tsc;\n");
1398 print_tabs(1, fd);
1399 fprintf(fd, "size_t before_hdr_pad, after_hdr_pad, header_size;\n");
1400 fprintf(fd, "\n");
1401
1402 print_tabs(1, fd);
1403 fprintf(fd, "if(ltt_traces.num_active_traces == 0) return;\n");
1404 fprintf(fd, "\n");
1405
1406 /* Calculate event variable len + event data alignment offset.
1407 * Assume that the padding for alignment starts at a void*
1408 * address.
1409 * This excludes the header size and alignment. */
1410
1411 print_tabs(1, fd);
1412 fprintf(fd, "/* For each field, calculate the field size. */\n");
1413 print_tabs(1, fd);
1414 fprintf(fd, "/* size = *to_base + *to + *len */\n");
1415 print_tabs(1, fd);
1416 fprintf(fd, "/* Assume that the padding for alignment starts at a\n");
1417 print_tabs(1, fd);
1418 fprintf(fd, " * sizeof(void *) address. */\n");
1419 fprintf(fd, "\n");
1420
1421 for(unsigned int i=0;i<event->fields.position;i++){
1422 field_t *field = (field_t*)(event->fields.array[i]);
1423 type_descriptor_t *type = field->type;
1424 /* Set from */
1425 print_tabs(1, fd);
1426 switch(type->type) {
1427 case SEQUENCE:
1428 case UNION:
1429 case ARRAY:
1430 case STRUCT:
1431 case STRING:
1432 fprintf(fd, "*from = lttng_param_%s;\n", field->name);
1433 break;
1434 default:
1435 fprintf(fd, "*from = &lttng_param_%s;\n", field->name);
1436 break;
1437 }
1438
1439 if(print_type_write(type,
1440 fd, 1, basename, field->name, "lttng_param_", 0)) return 1;
1441 fprintf(fd, "\n");
1442 }
1443 print_tabs(1, fd);
1444 fprintf(fd, "reserve_size = *to_base + *to + *len;\n");
1445
1446 /* Take locks : make sure the trace does not vanish while we write on
1447 * it. A simple preemption disabling is enough (using rcu traces). */
1448 print_tabs(1, fd);
1449 fprintf(fd, "preempt_disable();\n");
1450 print_tabs(1, fd);
1451 fprintf(fd, "ltt_nesting[smp_processor_id()]++;\n");
1452
1453 /* Get facility index */
1454
1455 if(event->per_tracefile) {
1456 print_tabs(1, fd);
1457 fprintf(fd, "index = tracefile_index;\n");
1458 } else {
1459 print_tabs(1, fd);
1460 fprintf(fd,
1461 "index = ltt_get_index_from_facility(ltt_facility_%s_%X,\n"\
1462 "\t\t\t\t\t\tevent_%s_%s);\n",
1463 fac->name, fac->checksum, fac->name, event->name);
1464 }
1465 fprintf(fd,"\n");
1466
1467
1468 /* For each trace */
1469 print_tabs(1, fd);
1470 fprintf(fd, "list_for_each_entry_rcu(trace, &ltt_traces.head, list) {\n");
1471 print_tabs(2, fd);
1472 fprintf(fd, "if(!trace->active) continue;\n\n");
1473
1474 if(event->per_trace) {
1475 print_tabs(2, fd);
1476 fprintf(fd, "if(dest_trace != trace) continue;\n\n");
1477 }
1478
1479 print_tabs(2, fd);
1480 fprintf(fd, "channel = ltt_get_channel_from_index(trace, index);\n");
1481 print_tabs(2, fd);
1482 fprintf(fd, "relayfs_buf = channel->rchan->buf[smp_processor_id()];\n");
1483 fprintf(fd, "\n");
1484
1485
1486 /* Relay reserve */
1487 /* If error, increment event lost counter (done by ltt_reserve_slot) and
1488 * return */
1489 print_tabs(2, fd);
1490 fprintf(fd, "slot_size = 0;\n");
1491 print_tabs(2, fd);
1492 fprintf(fd, "buffer = ltt_reserve_slot(trace, relayfs_buf,\n");
1493 print_tabs(3, fd);
1494 fprintf(fd, "reserve_size, &slot_size, &tsc,\n");
1495 print_tabs(3, fd);
1496 fprintf(fd, "&before_hdr_pad, &after_hdr_pad, &header_size);\n");
1497 /* If error, return */
1498 print_tabs(2, fd);
1499 fprintf(fd, "if(!buffer) continue; /* buffer full */\n\n");
1500 //print_tabs(2, fd);
1501 // for DEBUG only
1502 // fprintf(fd, "goto commit; /* DEBUG : never actually write. */\n\n");
1503 print_tabs(2, fd);
1504 fprintf(fd, "*to_base = *to = *len = 0;\n");
1505 fprintf(fd, "\n");
1506
1507 /* Write event header */
1508 print_tabs(2, fd);
1509 fprintf(fd, "ltt_write_event_header(trace, channel, buffer,\n");
1510 print_tabs(3, fd);
1511 fprintf(fd, "ltt_facility_%s_%X, event_%s_%s,\n", fac->name, fac->checksum,
1512 fac->name, event->name);
1513 print_tabs(3, fd);
1514 fprintf(fd, "reserve_size, before_hdr_pad, tsc);\n");
1515 print_tabs(2, fd);
1516 fprintf(fd, "*to_base += before_hdr_pad + after_hdr_pad + header_size;\n");
1517 fprintf(fd, "\n");
1518
1519 /* write data. */
1520
1521 for(unsigned int i=0;i<event->fields.position;i++){
1522 field_t *field = (field_t*)(event->fields.array[i]);
1523 type_descriptor_t *type = field->type;
1524
1525 /* Set from */
1526 print_tabs(2, fd);
1527 switch(type->type) {
1528 case SEQUENCE:
1529 case UNION:
1530 case ARRAY:
1531 case STRUCT:
1532 case STRING:
1533 fprintf(fd, "*from = lttng_param_%s;\n", field->name);
1534 break;
1535 default:
1536 fprintf(fd, "*from = &lttng_param_%s;\n", field->name);
1537 break;
1538 }
1539
1540
1541 if(print_type_write(type,
1542 fd, 2, basename, field->name, "lttng_param_", 0)) return 1;
1543 fprintf(fd, "\n");
1544
1545 /* Don't forget to flush pending memcpy */
1546 print_tabs(2, fd);
1547 fprintf(fd, "/* Flush pending memcpy */\n");
1548 print_tabs(2, fd);
1549 fprintf(fd, "if(*len != 0) {\n");
1550 print_tabs(3, fd);
1551 fprintf(fd, "memcpy(buffer+*to_base+*to, *from, *len);\n");
1552 print_tabs(3, fd);
1553 fprintf(fd, "*to += *len;\n");
1554 //print_tabs(3, fd);
1555 //fprintf(fd, "from += len;\n");
1556 print_tabs(3, fd);
1557 fprintf(fd, "*len = 0;\n");
1558 print_tabs(2, fd);
1559 fprintf(fd, "}\n");
1560 fprintf(fd, "\n");
1561 }
1562
1563
1564 /* commit */
1565 // for DEBUG only.
1566 //fprintf(fd, "commit:\n"); /* DEBUG! */
1567 print_tabs(2, fd);
1568 fprintf(fd, "ltt_commit_slot(relayfs_buf, buffer, slot_size);\n\n");
1569
1570 print_tabs(1, fd);
1571 fprintf(fd, "}\n\n");
1572
1573 /* Release locks */
1574 print_tabs(1, fd);
1575 fprintf(fd, "ltt_nesting[smp_processor_id()]--;\n");
1576 print_tabs(1, fd);
1577 fprintf(fd, "preempt_enable_no_resched();\n");
1578
1579 fprintf(fd, "}\n");
1580 fprintf(fd, "#endif //(!defined(CONFIG_LTT) || !defined(CONFIG_LTT_FACILITY_%s))\n\n",
1581 fac->capname);
1582 return 0;
1583 }
1584
1585 /* print_event_logging_function_user
1586 * Print the logging function of an event for userspace tracing. This is the
1587 * core of genevent */
1588 int print_event_logging_function_user(char *basename, facility_t *fac,
1589 event_t *event, FILE *fd)
1590 {
1591 fprintf(fd, "static inline int trace_%s(\n", basename);
1592 int has_argument = 0;
1593 int has_type_fixed = 0;
1594
1595 for(unsigned int j = 0; j < event->fields.position; j++) {
1596 /* For each field, print the function argument */
1597 field_t *f = (field_t*)event->fields.array[j];
1598 type_descriptor_t *t = f->type;
1599 if(has_argument) {
1600 fprintf(fd, ",");
1601 fprintf(fd, "\n");
1602 }
1603 if(print_arg(t, fd, 2, basename, f->name)) return 1;
1604 has_argument = 1;
1605 }
1606 if(!has_argument) {
1607 print_tabs(2, fd);
1608 fprintf(fd, "void");
1609 }
1610 fprintf(fd,")\n");
1611 fprintf(fd,
1612 "#ifndef LTT_TRACE\n");
1613 fprintf(fd, "{\n");
1614 fprintf(fd, "}\n");
1615 fprintf(fd,"#else\n");
1616 fprintf(fd, "{\n");
1617 /* Print the function variables */
1618 print_tabs(1, fd);
1619 fprintf(fd, "void *buffer = NULL;\n");
1620 print_tabs(1, fd);
1621 fprintf(fd, "size_t real_to_base = 0; /* The buffer is allocated on arch_size alignment */\n");
1622 print_tabs(1, fd);
1623 fprintf(fd, "size_t *to_base = &real_to_base;\n");
1624 print_tabs(1, fd);
1625 fprintf(fd, "size_t real_to = 0;\n");
1626 print_tabs(1, fd);
1627 fprintf(fd, "size_t *to = &real_to;\n");
1628 print_tabs(1, fd);
1629 fprintf(fd, "size_t real_len = 0;\n");
1630 print_tabs(1, fd);
1631 fprintf(fd, "size_t *len = &real_len;\n");
1632 print_tabs(1, fd);
1633 fprintf(fd, "size_t reserve_size;\n");
1634 print_tabs(1, fd);
1635 fprintf(fd, "size_t slot_size;\n");
1636 print_tabs(1, fd);
1637 fprintf(fd, "int ret = 0;\n");
1638 print_tabs(1, fd);
1639
1640 if(event->fields.position > 0) {
1641 for(unsigned int i=0;i<event->fields.position;i++){
1642 /* Search for at least one child with fixed size. It means
1643 * we need local variables.*/
1644 field_t *field = (field_t*)(event->fields.array[i]);
1645 type_descriptor_t *type = field->type;
1646 has_type_fixed = has_type_local(type);
1647 if(has_type_fixed) break;
1648 }
1649
1650 if(has_type_fixed) {
1651 fprintf(fd, "size_t align;\n");
1652 print_tabs(1, fd);
1653 }
1654
1655 fprintf(fd, "const void *real_from;\n");
1656 print_tabs(1, fd);
1657 fprintf(fd, "const void **from = &real_from;\n");
1658 print_tabs(1, fd);
1659 }
1660
1661 /* Calculate event variable len + event data alignment offset.
1662 * Assume that the padding for alignment starts at a void*
1663 * address.
1664 * This excludes the header size and alignment. */
1665
1666 print_tabs(1, fd);
1667 fprintf(fd, "/* For each field, calculate the field size. */\n");
1668 print_tabs(1, fd);
1669 fprintf(fd, "/* size = *to_base + *to + *len */\n");
1670 print_tabs(1, fd);
1671 fprintf(fd, "/* Assume that the padding for alignment starts at a\n");
1672 print_tabs(1, fd);
1673 fprintf(fd, " * sizeof(void *) address. */\n");
1674 fprintf(fd, "\n");
1675
1676 for(unsigned int i=0;i<event->fields.position;i++){
1677 field_t *field = (field_t*)(event->fields.array[i]);
1678 type_descriptor_t *type = field->type;
1679 /* Set from */
1680 print_tabs(1, fd);
1681 switch(type->type) {
1682 case SEQUENCE:
1683 case UNION:
1684 case ARRAY:
1685 case STRUCT:
1686 case STRING:
1687 fprintf(fd, "*from = lttng_param_%s;\n", field->name);
1688 break;
1689 default:
1690 fprintf(fd, "*from = &lttng_param_%s;\n", field->name);
1691 break;
1692 }
1693
1694 if(print_type_write(type,
1695 fd, 1, basename, field->name, "lttng_param_", 0)) return 1;
1696 fprintf(fd, "\n");
1697 }
1698 print_tabs(1, fd);
1699 fprintf(fd, "reserve_size = *to_base + *to + *len;\n");
1700
1701 print_tabs(1, fd);
1702 fprintf(fd, "{\n");
1703 print_tabs(2, fd);
1704 fprintf(fd, "char stack_buffer[reserve_size];\n");
1705 print_tabs(2, fd);
1706 fprintf(fd, "buffer = stack_buffer;\n");
1707 fprintf(fd, "\n");
1708
1709
1710 //print_tabs(2, fd);
1711 // for DEBUG only
1712 // fprintf(fd, "goto commit; /* DEBUG : never actually write. */\n\n");
1713 print_tabs(2, fd);
1714 fprintf(fd, "*to_base = *to = *len = 0;\n");
1715 fprintf(fd, "\n");
1716
1717 /* write data. */
1718
1719 for(unsigned int i=0;i<event->fields.position;i++){
1720 field_t *field = (field_t*)(event->fields.array[i]);
1721 type_descriptor_t *type = field->type;
1722
1723 /* Set from */
1724 print_tabs(2, fd);
1725 switch(type->type) {
1726 case SEQUENCE:
1727 case UNION:
1728 case ARRAY:
1729 case STRUCT:
1730 case STRING:
1731 fprintf(fd, "*from = lttng_param_%s;\n", field->name);
1732 break;
1733 default:
1734 fprintf(fd, "*from = &lttng_param_%s;\n", field->name);
1735 break;
1736 }
1737
1738
1739 if(print_type_write(type,
1740 fd, 2, basename, field->name, "lttng_param_", 0)) return 1;
1741 fprintf(fd, "\n");
1742
1743 /* Don't forget to flush pending memcpy */
1744 print_tabs(2, fd);
1745 fprintf(fd, "/* Flush pending memcpy */\n");
1746 print_tabs(2, fd);
1747 fprintf(fd, "if(*len != 0) {\n");
1748 print_tabs(3, fd);
1749 fprintf(fd, "memcpy(buffer+*to_base+*to, *from, *len);\n");
1750 print_tabs(3, fd);
1751 fprintf(fd, "*to += *len;\n");
1752 //print_tabs(3, fd);
1753 //fprintf(fd, "from += len;\n");
1754 print_tabs(3, fd);
1755 fprintf(fd, "*len = 0;\n");
1756 print_tabs(2, fd);
1757 fprintf(fd, "}\n");
1758 fprintf(fd, "\n");
1759 }
1760
1761
1762 print_tabs(2, fd);
1763 fprintf(fd, "ret = ltt_trace_generic(ltt_facility_%s_%X, event_%s_%s, stack_buffer, sizeof(stack_buffer));\n", fac->name, fac->checksum, fac->name, event->name);
1764
1765 print_tabs(1, fd);
1766 fprintf(fd, "}\n\n");
1767
1768 print_tabs(1, fd);
1769 fprintf(fd, "return ret;\n\n");
1770
1771 fprintf(fd, "}\n");
1772 fprintf(fd,
1773 "#endif //LTT_TRACE\n");
1774
1775 return 0;
1776 }
1777
1778 /* ltt-facility-name.h : main logging header.
1779 * log_header */
1780
1781 void print_log_header_head(facility_t *fac, FILE *fd)
1782 {
1783 fprintf(fd, "#ifndef _LTT_FACILITY_%s_H_\n", fac->capname);
1784 fprintf(fd, "#define _LTT_FACILITY_%s_H_\n\n", fac->capname);
1785 fprintf(fd, "#include <linux/types.h>\n");
1786 if(!fac->arch)
1787 fprintf(fd, "#include <linux/ltt/ltt-facility-id-%s.h>\n", fac->name);
1788 else
1789 fprintf(fd, "#include <asm/ltt/ltt-facility-id-%s_%s.h>\n",
1790 fac->name,
1791 fac->arch);
1792 fprintf(fd, "#include <linux/ltt-core.h>\n");
1793 fprintf(fd, "\n");
1794 }
1795
1796 /* ltt-facility-name.h : main logging header.
1797 * log_header */
1798
1799 void print_log_header_head_user(facility_t *fac, FILE *fd)
1800 {
1801 fprintf(fd, "#ifndef _LTT_FACILITY_%s_H_\n", fac->capname);
1802 fprintf(fd, "#define _LTT_FACILITY_%s_H_\n\n", fac->capname);
1803 fprintf(fd, "#include <sys/types.h>\n");
1804 if(!fac->arch)
1805 fprintf(fd, "#include <ltt/ltt-facility-id-%s.h>\n", fac->name);
1806 else
1807 fprintf(fd, "#include <asm/ltt/ltt-facility-id-%s_%s.h>\n",
1808 fac->name,
1809 fac->arch);
1810 fprintf(fd, "#include <ltt/ltt-generic.h>\n");
1811 fprintf(fd, "\n");
1812 }
1813
1814
1815 int print_log_header_types(facility_t *fac, FILE *fd)
1816 {
1817 sequence_t *types = &fac->named_types.values;
1818 fprintf(fd, "/* Named types */\n");
1819 fprintf(fd, "\n");
1820
1821 for(unsigned int i = 0; i < types->position; i++) {
1822 /* For each named type, print the definition */
1823 if(print_type_declaration(types->array[i], fd,
1824 0, "", "")) return 1;
1825 /* Print also the align function */
1826 if(print_type_alignment_fct(types->array[i], fd,
1827 0, "", "")) return 1;
1828 /* Print also the write function */
1829 if(print_type_write_fct(types->array[i], fd,
1830 0, "", "")) return 1;
1831 }
1832 return 0;
1833 }
1834
1835 int print_log_header_events(facility_t *fac, FILE *fd)
1836 {
1837 sequence_t *events = &fac->events;
1838 char basename[PATH_MAX];
1839 unsigned int facname_len;
1840
1841 strncpy(basename, fac->name, PATH_MAX);
1842 facname_len = strlen(basename);
1843 strncat(basename, "_", PATH_MAX-facname_len);
1844 facname_len = strlen(basename);
1845
1846 for(unsigned int i = 0; i < events->position; i++) {
1847 event_t *event = (event_t*)events->array[i];
1848 strncpy(&basename[facname_len], event->name, PATH_MAX-facname_len);
1849
1850 /* For each event, print structure, and then logging function */
1851 fprintf(fd, "/* Event %s structures */\n",
1852 event->name);
1853 for(unsigned int j = 0; j < event->fields.position; j++) {
1854 /* For each unnamed type, print the definition */
1855 field_t *f = (field_t*)event->fields.array[j];
1856 type_descriptor_t *t = f->type;
1857 if(t->type_name == NULL) {
1858 if((print_type_declaration(t, fd, 0, basename, f->name))) return 1;
1859 /* Print also the align function */
1860 if((print_type_alignment_fct(t, fd, 0, basename, f->name))) return 1;
1861 /* Print also the write function */
1862 if((print_type_write_fct(t, fd, 0, basename, f->name))) return 1;
1863 }
1864 }
1865
1866 fprintf(fd, "\n");
1867
1868 fprintf(fd, "/* Event %s logging function */\n",
1869 event->name);
1870
1871 if(!fac->user) {
1872 if(print_event_logging_function(basename, fac, event, fd)) return 1;
1873 } else {
1874 if(print_event_logging_function_user(basename, fac, event, fd)) return 1;
1875 }
1876
1877 fprintf(fd, "\n");
1878 }
1879
1880 return 0;
1881 }
1882
1883
1884 void print_log_header_tail(facility_t *fac, FILE *fd)
1885 {
1886 fprintf(fd, "#endif //_LTT_FACILITY_%s_H_\n",fac->capname);
1887 }
1888
1889 void print_log_header_tail_user(facility_t *fac, FILE *fd)
1890 {
1891 fprintf(fd, "#endif //_LTT_FACILITY_%s_H_\n",fac->capname);
1892 }
1893
1894 int print_log_header(facility_t *fac)
1895 {
1896 char filename[PATH_MAX];
1897 unsigned int filename_size = 0;
1898 FILE *fd;
1899 dprintf("%s\n", fac->name);
1900
1901 strcpy(filename, "ltt-facility-");
1902 filename_size = strlen(filename);
1903
1904 strncat(filename, fac->name, PATH_MAX - filename_size);
1905 filename_size = strlen(filename);
1906
1907 if(fac->arch) {
1908 strncat(filename, "_", PATH_MAX - filename_size);
1909 filename_size = strlen(filename);
1910
1911 strncat(filename, fac->arch, PATH_MAX - filename_size);
1912 filename_size = strlen(filename);
1913 }
1914
1915 strncat(filename, ".h", PATH_MAX - filename_size);
1916 filename_size = strlen(filename);
1917
1918
1919 fd = fopen(filename, "w");
1920 if(fd == NULL) {
1921 printf("Error opening file %s for writing : %s\n",
1922 filename, strerror(errno));
1923 return errno;
1924 }
1925
1926 /* Print file head */
1927 if(!fac->user)
1928 print_log_header_head(fac, fd);
1929 else
1930 print_log_header_head_user(fac, fd);
1931
1932 /* print named types in declaration order */
1933 if(print_log_header_types(fac, fd)) return 1;
1934
1935 /* Print events */
1936 if(print_log_header_events(fac, fd)) return 1;
1937
1938 /* Print file tail */
1939 if(!fac->user)
1940 print_log_header_tail(fac, fd);
1941 else
1942 print_log_header_tail_user(fac, fd);
1943
1944
1945
1946 fclose(fd);
1947
1948 return 0;
1949 }
1950
1951
1952 /* ltt-facility-id-name.h : facility id.
1953 * log_id_header */
1954 int print_id_header(facility_t *fac)
1955 {
1956 char filename[PATH_MAX];
1957 unsigned int filename_size = 0;
1958 FILE *fd;
1959 char basename[PATH_MAX];
1960 char basename_len = 0;
1961
1962 dprintf("%s\n", fac->name);
1963
1964 strcpy(filename, "ltt-facility-id-");
1965 filename_size = strlen(filename);
1966
1967 strncat(filename, fac->name, PATH_MAX - filename_size);
1968 filename_size = strlen(filename);
1969
1970 if(fac->arch) {
1971 strncat(filename, "_", PATH_MAX - filename_size);
1972 filename_size = strlen(filename);
1973
1974 strncat(filename, fac->arch, PATH_MAX - filename_size);
1975 filename_size = strlen(filename);
1976 }
1977
1978 strncat(filename, ".h", PATH_MAX - filename_size);
1979 filename_size = strlen(filename);
1980
1981
1982 fd = fopen(filename, "w");
1983 if(fd == NULL) {
1984 printf("Error opening file %s for writing : %s\n",
1985 filename, strerror(errno));
1986 return errno;
1987 }
1988
1989 if(!fac->user) {
1990 fprintf(fd, "#ifndef _LTT_FACILITY_ID_%s_H_\n",fac->capname);
1991 fprintf(fd, "#define _LTT_FACILITY_ID_%s_H_\n\n",fac->capname);
1992 fprintf(fd, "#ifdef CONFIG_LTT\n");
1993
1994 fprintf(fd,"#include <linux/ltt-facilities.h>\n\n");
1995
1996 fprintf(fd,"/**** facility handle ****/\n\n");
1997 fprintf(fd,"extern ltt_facility_t ltt_facility_%s_%X;\n",
1998 fac->name, fac->checksum);
1999 fprintf(fd,"extern ltt_facility_t ltt_facility_%s;\n\n\n",fac->name);
2000
2001 strncpy(basename, fac->name, PATH_MAX);
2002 basename_len = strlen(basename);
2003 strncat(basename, "_", PATH_MAX - basename_len);
2004 basename_len++;
2005
2006 fprintf(fd,"/**** event index ****/\n\n");
2007 fprintf(fd,"enum %s_event {\n",fac->name);
2008
2009 for(unsigned int i = 0; i < fac->events.position; i++) {
2010 event_t *event = (event_t*)fac->events.array[i];
2011 strncpy(basename+basename_len, event->name, PATH_MAX-basename_len);
2012 print_tabs(1, fd);
2013 fprintf(fd, "event_%s,\n", basename);
2014 }
2015 print_tabs(1, fd);
2016 fprintf(fd, "facility_%s_num_events\n", fac->name);
2017 fprintf(fd, "};\n");
2018 fprintf(fd, "\n");
2019
2020
2021 fprintf(fd, "#endif //CONFIG_LTT\n");
2022 fprintf(fd, "#endif //_LTT_FACILITY_ID_%s_H_\n",fac->capname);
2023 } else {
2024 fprintf(fd, "#ifndef _LTT_FACILITY_ID_%s_H_\n",fac->capname);
2025 fprintf(fd, "#define _LTT_FACILITY_ID_%s_H_\n\n",fac->capname);
2026 fprintf(fd, "#ifdef LTT_TRACE\n");
2027
2028 fprintf(fd,"#include <ltt/ltt-generic.h>\n\n");
2029
2030 fprintf(fd,"/**** facility handle ****/\n\n");
2031 fprintf(fd,"extern ltt_facility_t ltt_facility_%s_%X;\n",
2032 fac->name, fac->checksum);
2033 fprintf(fd,"extern ltt_facility_t ltt_facility_%s;\n\n\n",fac->name);
2034
2035 strncpy(basename, fac->name, PATH_MAX);
2036 basename_len = strlen(basename);
2037 strncat(basename, "_", PATH_MAX - basename_len);
2038 basename_len++;
2039
2040 fprintf(fd,"/**** event index ****/\n\n");
2041 fprintf(fd,"enum %s_event {\n",fac->name);
2042
2043 for(unsigned int i = 0; i < fac->events.position; i++) {
2044 event_t *event = (event_t*)fac->events.array[i];
2045 strncpy(basename+basename_len, event->name, PATH_MAX-basename_len);
2046 print_tabs(1, fd);
2047 fprintf(fd, "event_%s,\n", basename);
2048 }
2049 print_tabs(1, fd);
2050 fprintf(fd, "facility_%s_num_events\n", fac->name);
2051 fprintf(fd, "};\n");
2052 fprintf(fd, "\n");
2053
2054
2055 fprintf(fd, "#endif //LTT_TRACE\n");
2056 fprintf(fd, "#endif //_LTT_FACILITY_ID_%s_H_\n",fac->capname);
2057 }
2058
2059
2060 fclose(fd);
2061
2062 return 0;
2063 }
2064
2065
2066 /* ltt-facility-loader-name.h : facility specific loader info.
2067 * loader_header */
2068 int print_loader_header(facility_t *fac)
2069 {
2070 char filename[PATH_MAX];
2071 unsigned int filename_size = 0;
2072 FILE *fd;
2073 dprintf("%s\n", fac->name);
2074
2075 strcpy(filename, "ltt-facility-loader-");
2076 filename_size = strlen(filename);
2077
2078 strncat(filename, fac->name, PATH_MAX - filename_size);
2079 filename_size = strlen(filename);
2080
2081 if(fac->arch) {
2082 strncat(filename, "_", PATH_MAX - filename_size);
2083 filename_size = strlen(filename);
2084
2085 strncat(filename, fac->arch, PATH_MAX - filename_size);
2086 filename_size = strlen(filename);
2087 }
2088
2089 strncat(filename, ".h", PATH_MAX - filename_size);
2090 filename_size = strlen(filename);
2091
2092
2093 fd = fopen(filename, "w");
2094 if(fd == NULL) {
2095 printf("Error opening file %s for writing : %s\n",
2096 filename, strerror(errno));
2097 return errno;
2098 }
2099
2100 fprintf(fd, "#ifndef _LTT_FACILITY_LOADER_%s_H_\n", fac->capname);
2101 fprintf(fd, "#define _LTT_FACILITY_LOADER_%s_H_\n\n", fac->capname);
2102 fprintf(fd, "#ifdef CONFIG_LTT\n\n");
2103 fprintf(fd,"#include <linux/ltt-facilities.h>\n");
2104 if(!fac->arch)
2105 fprintf(fd,"#include <linux/ltt/ltt-facility-id-%s.h>\n\n",
2106 fac->name);
2107 else
2108 fprintf(fd,"#include <asm/ltt/ltt-facility-id-%s_%s.h>\n\n",
2109 fac->name,
2110 fac->arch);
2111 fprintf(fd,"ltt_facility_t\tltt_facility_%s;\n", fac->name);
2112 fprintf(fd,"ltt_facility_t\tltt_facility_%s_%X;\n\n",
2113 fac->name, fac->checksum);
2114
2115 fprintf(fd,"#define LTT_FACILITY_SYMBOL\t\t\t\t\t\t\tltt_facility_%s\n",
2116 fac->name);
2117 fprintf(fd,"#define LTT_FACILITY_CHECKSUM_SYMBOL\t\tltt_facility_%s_%X\n",
2118 fac->name, fac->checksum);
2119 fprintf(fd,"#define LTT_FACILITY_CHECKSUM\t\t\t\t\t\t0x%X\n", fac->checksum);
2120 fprintf(fd,"#define LTT_FACILITY_NAME\t\t\t\t\t\t\t\t\"%s\"\n", fac->name);
2121 fprintf(fd,"#define LTT_FACILITY_NUM_EVENTS\t\t\t\t\tfacility_%s_num_events\n\n",
2122 fac->name);
2123 fprintf(fd, "#endif //CONFIG_LTT\n\n");
2124 fprintf(fd, "#endif //_LTT_FACILITY_LOADER_%s_H_\n", fac->capname);
2125
2126 fclose(fd);
2127
2128 return 0;
2129 }
2130
2131 int print_loader_header_user(facility_t *fac)
2132 {
2133 char filename[PATH_MAX];
2134 unsigned int filename_size = 0;
2135 FILE *fd;
2136 dprintf("%s\n", fac->name);
2137
2138 strcpy(filename, "ltt-facility-loader-");
2139 filename_size = strlen(filename);
2140
2141 strncat(filename, fac->name, PATH_MAX - filename_size);
2142 filename_size = strlen(filename);
2143
2144 if(fac->arch) {
2145 strncat(filename, "_", PATH_MAX - filename_size);
2146 filename_size = strlen(filename);
2147
2148 strncat(filename, fac->arch, PATH_MAX - filename_size);
2149 filename_size = strlen(filename);
2150 }
2151
2152 strncat(filename, ".h", PATH_MAX - filename_size);
2153 filename_size = strlen(filename);
2154
2155
2156 fd = fopen(filename, "w");
2157 if(fd == NULL) {
2158 printf("Error opening file %s for writing : %s\n",
2159 filename, strerror(errno));
2160 return errno;
2161 }
2162
2163 fprintf(fd, "#ifndef _LTT_FACILITY_LOADER_%s_H_\n", fac->capname);
2164 fprintf(fd, "#define _LTT_FACILITY_LOADER_%s_H_\n\n", fac->capname);
2165 fprintf(fd,"#include <ltt/ltt-generic.h>\n");
2166 if(!fac->arch)
2167 fprintf(fd,"#include <ltt/ltt-facility-id-%s.h>\n\n",
2168 fac->name);
2169 else
2170 fprintf(fd,"#include <asm/ltt/ltt-facility-id-%s_%s.h>\n\n",
2171 fac->name,
2172 fac->arch);
2173 fprintf(fd,"ltt_facility_t\tltt_facility_%s;\n", fac->name);
2174 fprintf(fd,"ltt_facility_t\tltt_facility_%s_%X;\n\n",
2175 fac->name, fac->checksum);
2176
2177 fprintf(fd,"#define LTT_FACILITY_SYMBOL\t\t\t\t\t\t\tltt_facility_%s\n",
2178 fac->name);
2179 fprintf(fd,"#define LTT_FACILITY_CHECKSUM_SYMBOL\t\tltt_facility_%s_%X\n",
2180 fac->name, fac->checksum);
2181 fprintf(fd,"#define LTT_FACILITY_CHECKSUM\t\t\t\t\t\t0x%X\n", fac->checksum);
2182 fprintf(fd,"#define LTT_FACILITY_NAME\t\t\t\t\t\t\t\t\"%s\"\n", fac->name);
2183 fprintf(fd,"#define LTT_FACILITY_NUM_EVENTS\t\t\t\t\tfacility_%s_num_events\n\n",
2184 fac->name);
2185 fprintf(fd, "#endif //_LTT_FACILITY_LOADER_%s_H_\n", fac->capname);
2186
2187 fclose(fd);
2188
2189 return 0;
2190 }
2191
2192
2193
2194 /* ltt-facility-loader-name.c : generic facility loader
2195 * loader_c */
2196 int print_loader_c(facility_t *fac)
2197 {
2198 char filename[PATH_MAX];
2199 unsigned int filename_size = 0;
2200 FILE *fd;
2201 dprintf("%s\n", fac->name);
2202
2203 strcpy(filename, "ltt-facility-loader-");
2204 filename_size = strlen(filename);
2205
2206 strncat(filename, fac->name, PATH_MAX - filename_size);
2207 filename_size = strlen(filename);
2208
2209 if(fac->arch) {
2210 strncat(filename, "_", PATH_MAX - filename_size);
2211 filename_size = strlen(filename);
2212
2213 strncat(filename, fac->arch, PATH_MAX - filename_size);
2214 filename_size = strlen(filename);
2215 }
2216
2217 strncat(filename, ".c", PATH_MAX - filename_size);
2218 filename_size = strlen(filename);
2219
2220
2221 fd = fopen(filename, "w");
2222 if(fd == NULL) {
2223 printf("Error opening file %s for writing : %s\n",
2224 filename, strerror(errno));
2225 return errno;
2226 }
2227
2228 fprintf(fd, "/*\n");
2229 if(!fac->arch)
2230 fprintf(fd, " * ltt-facility-loader-%s.c\n", fac->name);
2231 else
2232 fprintf(fd, " * ltt-facility-loader-%s_%s.c\n", fac->name, fac->arch);
2233 fprintf(fd, " *\n");
2234 fprintf(fd, " * (C) Copyright 2005 - \n");
2235 fprintf(fd, " * Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)\n");
2236 fprintf(fd, " *\n");
2237 fprintf(fd, " * Contains the LTT facility loader.\n");
2238 fprintf(fd, " *\n");
2239 fprintf(fd, " */\n");
2240 fprintf(fd, "\n");
2241 fprintf(fd, "\n");
2242 fprintf(fd, "#include <linux/ltt-facilities.h>\n");
2243 fprintf(fd, "#include <linux/module.h>\n");
2244 fprintf(fd, "#include <linux/init.h>\n");
2245 fprintf(fd, "#include <linux/config.h>\n");
2246 if(!fac->arch)
2247 fprintf(fd, "#include \"ltt-facility-loader-%s.h\"\n", fac->name);
2248 else
2249 fprintf(fd, "#include \"ltt-facility-loader-%s_%s.h\"\n",
2250 fac->name, fac->arch);
2251 fprintf(fd, "\n");
2252 fprintf(fd, "\n");
2253 fprintf(fd, "#ifdef CONFIG_LTT\n");
2254 fprintf(fd, "\n");
2255 fprintf(fd, "EXPORT_SYMBOL(LTT_FACILITY_SYMBOL);\n");
2256 fprintf(fd, "EXPORT_SYMBOL(LTT_FACILITY_CHECKSUM_SYMBOL);\n");
2257 fprintf(fd, "\n");
2258 fprintf(fd, "static const char ltt_facility_name[] = LTT_FACILITY_NAME;\n");
2259 fprintf(fd, "\n");
2260 fprintf(fd, "#define SYMBOL_STRING(sym) #sym\n");
2261 fprintf(fd, "\n");
2262 fprintf(fd, "static struct ltt_facility facility = {\n");
2263 fprintf(fd, "\t.name = ltt_facility_name,\n");
2264 fprintf(fd, "\t.num_events = LTT_FACILITY_NUM_EVENTS,\n");
2265 fprintf(fd, "\t.checksum = LTT_FACILITY_CHECKSUM,\n");
2266 fprintf(fd, "\t.symbol = SYMBOL_STRING(LTT_FACILITY_SYMBOL),\n");
2267 fprintf(fd, "};\n");
2268 fprintf(fd, "\n");
2269 fprintf(fd, "static int __init facility_init(void)\n");
2270 fprintf(fd, "{\n");
2271 fprintf(fd, "\tprintk(KERN_INFO \"LTT : ltt-facility-%s init in kernel\\n\");\n", fac->name);
2272 fprintf(fd, "\n");
2273 fprintf(fd, "\tLTT_FACILITY_SYMBOL = ltt_facility_kernel_register(&facility);\n");
2274 fprintf(fd, "\tLTT_FACILITY_CHECKSUM_SYMBOL = LTT_FACILITY_SYMBOL;\n");
2275 fprintf(fd, "\t\n");
2276 fprintf(fd, "\treturn LTT_FACILITY_SYMBOL;\n");
2277 fprintf(fd, "}\n");
2278 fprintf(fd, "__initcall(facility_init);\n");
2279 fprintf(fd, "\n");
2280 fprintf(fd, "\n");
2281 fprintf(fd, "#ifndef MODULE\n");
2282 fprintf(fd, "\n");
2283 fprintf(fd, "static void __exit facility_exit(void)\n");
2284 fprintf(fd, "{\n");
2285 fprintf(fd, "\tint err;\n");
2286 fprintf(fd, "\n");
2287 fprintf(fd, "\terr = ltt_facility_unregister(LTT_FACILITY_SYMBOL);\n");
2288 fprintf(fd, "\tif(err != 0)\n");
2289 fprintf(fd, "\t\tprintk(KERN_ERR \"LTT : Error in unregistering facility.\\n\");\n");
2290 fprintf(fd, "\n");
2291 fprintf(fd, "}\n");
2292 fprintf(fd, "\n");
2293 fprintf(fd, "module_exit(facility_exit)\n");
2294 fprintf(fd, "\n");
2295 fprintf(fd, "\n");
2296 fprintf(fd, "MODULE_LICENSE(\"GPL\");\n");
2297 fprintf(fd, "MODULE_AUTHOR(\"Mathieu Desnoyers\");\n");
2298 fprintf(fd, "MODULE_DESCRIPTION(\"Linux Trace Toolkit Facility\");\n");
2299 fprintf(fd, "\n");
2300 fprintf(fd, "#endif //MODULE\n");
2301 fprintf(fd, "\n");
2302 fprintf(fd, "#endif //CONFIG_LTT\n");
2303
2304 fclose(fd);
2305
2306 return 0;
2307 }
2308
2309 int print_loader_c_user(facility_t *fac)
2310 {
2311 char filename[PATH_MAX];
2312 unsigned int filename_size = 0;
2313 FILE *fd;
2314 dprintf("%s\n", fac->name);
2315
2316 strcpy(filename, "ltt-facility-loader-");
2317 filename_size = strlen(filename);
2318
2319 strncat(filename, fac->name, PATH_MAX - filename_size);
2320 filename_size = strlen(filename);
2321
2322 if(fac->arch) {
2323 strncat(filename, "_", PATH_MAX - filename_size);
2324 filename_size = strlen(filename);
2325
2326 strncat(filename, fac->arch, PATH_MAX - filename_size);
2327 filename_size = strlen(filename);
2328 }
2329
2330 strncat(filename, ".c", PATH_MAX - filename_size);
2331 filename_size = strlen(filename);
2332
2333
2334 fd = fopen(filename, "w");
2335 if(fd == NULL) {
2336 printf("Error opening file %s for writing : %s\n",
2337 filename, strerror(errno));
2338 return errno;
2339 }
2340
2341 fprintf(fd, "/*\n");
2342 if(!fac->arch)
2343 fprintf(fd, " * ltt-facility-loader-%s.c\n", fac->name);
2344 else
2345 fprintf(fd, " * ltt-facility-loader-%s_%s.c\n", fac->name, fac->arch);
2346 fprintf(fd, " *\n");
2347 fprintf(fd, " * (C) Copyright 2005 - \n");
2348 fprintf(fd, " * Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)\n");
2349 fprintf(fd, " *\n");
2350 fprintf(fd, " * Contains the LTT user space facility loader.\n");
2351 fprintf(fd, " *\n");
2352 fprintf(fd, " */\n");
2353 fprintf(fd, "\n");
2354 fprintf(fd, "\n");
2355 fprintf(fd, "#define LTT_TRACE\n");
2356 fprintf(fd, "#include <error.h>\n");
2357 fprintf(fd, "#include <stdio.h>\n");
2358 fprintf(fd, "#include <ltt/ltt-generic.h>\n");
2359 if(!fac->arch)
2360 fprintf(fd, "#include \"ltt-facility-loader-%s.h\"\n", fac->name);
2361 else
2362 fprintf(fd, "#include \"ltt-facility-loader-%s_%s.h\"\n",
2363 fac->name, fac->arch);
2364 fprintf(fd, "\n");
2365 fprintf(fd, "static struct user_facility_info facility = {\n");
2366 fprintf(fd, "\t.name = LTT_FACILITY_NAME,\n");
2367 fprintf(fd, "\t.num_events = LTT_FACILITY_NUM_EVENTS,\n");
2368 fprintf(fd, "#ifndef LTT_PACK\n");
2369 fprintf(fd, "\t.alignment = sizeof(void*),\n");
2370 fprintf(fd, "#else\n");
2371 fprintf(fd, "\t.alignment = 0,\n");
2372 fprintf(fd, "#endif //LTT_PACK\n");
2373 fprintf(fd, "\t.checksum = LTT_FACILITY_CHECKSUM,\n");
2374 fprintf(fd, "\t.int_size = sizeof(int),\n");
2375 fprintf(fd, "\t.long_size = sizeof(long),\n");
2376 fprintf(fd, "\t.pointer_size = sizeof(void*),\n");
2377 fprintf(fd, "\t.size_t_size = sizeof(size_t)\n");
2378 fprintf(fd, "};\n");
2379 fprintf(fd, "\n");
2380 fprintf(fd, "static void __attribute__((constructor)) __ltt_user_init(void)\n");
2381 fprintf(fd, "{\n");
2382 fprintf(fd, "\tint err;\n");
2383 fprintf(fd, "\tprintf(\"LTT : ltt-facility-%s init in userspace\\n\");\n", fac->name);
2384 fprintf(fd, "\n");
2385 fprintf(fd, "\terr = ltt_register_generic(&LTT_FACILITY_SYMBOL, &facility);\n");
2386 fprintf(fd, "\tLTT_FACILITY_CHECKSUM_SYMBOL = LTT_FACILITY_SYMBOL;\n");
2387 fprintf(fd, "\t\n");
2388 fprintf(fd, "\tif(err) {\n");
2389 fprintf(fd, "\t\tperror(\"Error in ltt_register_generic\");\n");
2390 fprintf(fd, "\t}\n");
2391 fprintf(fd, "}\n");
2392 fprintf(fd, "\n");
2393
2394 fclose(fd);
2395
2396 return 0;
2397 }
2398
2399
2400
2401 /* open facility */
2402 /* code taken from ltt_facility_open in ltt/facility.c in lttv */
2403
2404 /*****************************************************************************
2405 *Function name
2406 * ltt_facility_open : open facilities
2407 *Input params
2408 * pathname : the path name of the facility
2409 *
2410 * Open the facility corresponding to the right checksum.
2411 *
2412 *returns the facility on success, NULL on error.
2413 ****************************************************************************/
2414 facility_t *ltt_facility_open(char * pathname)
2415 {
2416 int ret = 0;
2417 char *token;
2418 parse_file_t in;
2419 facility_t * fac = NULL;
2420 char buffer[BUFFER_SIZE];
2421 int generated = FALSE;
2422
2423 in.buffer = &(buffer[0]);
2424 in.lineno = 0;
2425 in.error = error_callback;
2426 in.name = pathname;
2427 in.unget = 0;
2428
2429 in.fp = fopen(in.name, "r");
2430 if(in.fp == NULL) {
2431 ret = 1;
2432 goto open_error;
2433 }
2434
2435 while(1){
2436 token = getToken(&in);
2437 if(in.type == ENDFILE) break;
2438
2439 if(generated) {
2440 printf("More than one facility in the file. Only using the first one.\n");
2441 break;
2442 }
2443
2444 if(strcmp(token, "<")) in.error(&in,"not a facility file");
2445 token = getName(&in);
2446
2447 if(strcmp("facility",token) == 0) {
2448 fac = malloc(sizeof(facility_t));
2449 fac->name = NULL;
2450 fac->description = NULL;
2451 sequence_init(&(fac->events));
2452 table_init(&(fac->named_types));
2453 sequence_init(&(fac->unnamed_types));
2454
2455 parseFacility(&in, fac);
2456
2457 //check if any namedType is not defined
2458 checkNamedTypesImplemented(&fac->named_types);
2459
2460 generateChecksum(fac->name, &fac->checksum, &fac->events);
2461
2462 generated = TRUE;
2463 }
2464 else {
2465 printf("facility token was expected in file %s\n", in.name);
2466 ret = 1;
2467 goto parse_error;
2468 }
2469 }
2470
2471 parse_error:
2472 fclose(in.fp);
2473 open_error:
2474
2475 if(!generated) {
2476 printf("Cannot find facility %s\n", pathname);
2477 fac = NULL;
2478 }
2479
2480 return fac;
2481 }
2482
2483 /* Close the facility */
2484 void ltt_facility_close(facility_t *fac)
2485 {
2486 free(fac->name);
2487 free(fac->capname);
2488 free(fac->description);
2489 freeEvents(&fac->events);
2490 sequence_dispose(&fac->events);
2491 freeNamedType(&fac->named_types);
2492 table_dispose(&fac->named_types);
2493 freeTypes(&fac->unnamed_types);
2494 sequence_dispose(&fac->unnamed_types);
2495 free(fac);
2496 }
2497
2498
2499 /* Show help */
2500 void show_help(int argc, char ** argv)
2501 {
2502 printf("Genevent help : \n");
2503 printf("\n");
2504 printf("Use %s name.xml\n", argv[0]);
2505 printf("to create :\n");
2506 printf("ltt-facility-name.h\n");
2507 printf("ltt-facility-id-name.h\n");
2508 printf("ltt-facility-loader-name.h\n");
2509 printf("ltt-facility-loader-name.c\n");
2510 printf("In the current directory.\n");
2511 printf("\n");
2512 }
2513
2514 /* Parse program arguments */
2515 /* Return values :
2516 * 0 : continue program
2517 * -1 : stop program, return 0
2518 * > 0 : stop program, return value as exit.
2519 */
2520 int check_args(int argc, char **argv)
2521 {
2522 if(argc < 2) {
2523 printf("Not enough arguments\n");
2524 show_help(argc, argv);
2525 return EINVAL;
2526 }
2527
2528 if(strcmp(argv[1], "-h") == 0) {
2529 show_help(argc, argv);
2530 return -1;
2531 }
2532
2533 return 0;
2534 }
2535
2536 int main(int argc, char **argv)
2537 {
2538 int err = 0;
2539 facility_t *fac;
2540
2541 err = check_args(argc, argv);
2542 if(err > 0) return err;
2543 else if(err < 0) return 0;
2544
2545 /* open the facility */
2546 fac = ltt_facility_open(argv[1]);
2547 if(fac == NULL) {
2548 printf("Error opening file %s for reading : %s\n",
2549 argv[1], strerror(errno));
2550 return errno;
2551 }
2552
2553 /* generate the output C files */
2554
2555
2556 /* ltt-facility-name.h : main logging header.
2557 * log_header */
2558 err = print_log_header(fac);
2559 if(err) return err;
2560
2561 /* ltt-facility-id-name.h : facility id.
2562 * log_id_header */
2563 err = print_id_header(fac);
2564 if(err) return err;
2565
2566 /* ltt-facility-loader-name.h : facility specific loader info.
2567 * loader_header */
2568 if(!fac->user)
2569 err = print_loader_header(fac);
2570 else
2571 err = print_loader_header_user(fac);
2572 if(err) return err;
2573
2574 /* ltt-facility-loader-name.c : generic faciilty loader
2575 * loader_c */
2576 if(!fac->user)
2577 err = print_loader_c(fac);
2578 else
2579 err = print_loader_c_user(fac);
2580 if(err) return err;
2581
2582 /* close the facility */
2583 ltt_facility_close(fac);
2584
2585 return 0;
2586 }
2587
2588
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