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adding compact data
[lttv.git] / genevent / 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
90 enum user_fct_types { USER_FCT_PROTO, USER_FCT_DECLARATION } ;
91
92 /* Code printing */
93
94 void print_tabs(unsigned int tabs, FILE *fd)
95 {
96 for(unsigned int i = 0; i<tabs;i++)
97 fprintf(fd, "\t");
98 }
99
100 /* print type.
101 *
102 * Copied from construct_types_and_fields in LTTV facility.c */
103
104 int print_type(type_descriptor_t * td, FILE *fd, unsigned int tabs,
105 char *nest_name, char *field_name)
106 {
107 char basename[PATH_MAX];
108 unsigned int basename_len = 0;
109
110 strcpy(basename, nest_name);
111 basename_len = strlen(basename);
112
113 /* For a named type, we use the type_name directly */
114 if(td->type_name != NULL) {
115 strncpy(basename, td->type_name, PATH_MAX);
116 basename_len = strlen(basename);
117 } else {
118 /* For a unnamed type, there must be a field name */
119 if((basename_len != 0)
120 && (basename[basename_len-1] != '_')
121 && (field_name[0] != '\0')) {
122 strncat(basename, "_", PATH_MAX - basename_len);
123 basename_len = strlen(basename);
124 }
125 strncat(basename, field_name, PATH_MAX - basename_len);
126 }
127
128 switch(td->type) {
129 case INT_FIXED:
130 fprintf(fd, "%s", intOutputTypes[getSizeindex(td->size)]);
131 break;
132 case UINT_FIXED:
133 fprintf(fd, "%s", uintOutputTypes[getSizeindex(td->size)]);
134 break;
135 case CHAR:
136 fprintf(fd, "signed char");
137 break;
138 case UCHAR:
139 fprintf(fd, "unsigned char");
140 break;
141 case SHORT:
142 fprintf(fd, "short");
143 break;
144 case USHORT:
145 fprintf(fd, "unsigned short");
146 break;
147 case INT:
148 fprintf(fd, "int");
149 break;
150 case UINT:
151 fprintf(fd, "unsigned int");
152 break;
153 case FLOAT:
154 fprintf(fd, "%s", floatOutputTypes[getSizeindex(td->size)]);
155 break;
156 case POINTER:
157 fprintf(fd, "const void *");
158 break;
159 case LONG:
160 fprintf(fd, "long");
161 break;
162 case ULONG:
163 fprintf(fd, "unsigned long");
164 break;
165 case SIZE_T:
166 fprintf(fd, "size_t");
167 break;
168 case SSIZE_T:
169 fprintf(fd, "ssize_t");
170 break;
171 case OFF_T:
172 fprintf(fd, "off_t");
173 break;
174 case STRING:
175 fprintf(fd, "const char *");
176 break;
177 case ENUM:
178 fprintf(fd, "enum lttng_%s", basename);
179 break;
180 case ARRAY:
181 fprintf(fd, "lttng_array_%s", basename);
182 break;
183 case SEQUENCE:
184 fprintf(fd, "lttng_sequence_%s", basename);
185 break;
186 case STRUCT:
187 fprintf(fd, "struct lttng_%s", basename);
188 break;
189 case UNION:
190 fprintf(fd, "union lttng_%s", basename);
191 break;
192 default:
193 printf("print_type : unknown type\n");
194 return 1;
195 }
196
197 return 0;
198 }
199
200 /* Print logging function argument */
201 int print_arg(type_descriptor_t * td, FILE *fd, unsigned int tabs,
202 char *nest_name, char *field_name)
203 {
204 char basename[PATH_MAX];
205 unsigned int basename_len = 0;
206
207 strcpy(basename, nest_name);
208 basename_len = strlen(basename);
209
210 /* For a named type, we use the type_name directly */
211 if(td->type_name != NULL) {
212 strncpy(basename, td->type_name, PATH_MAX);
213 basename_len = strlen(basename);
214 } else {
215 /* For a unnamed type, there must be a field name */
216 if((basename_len != 0)
217 && (basename[basename_len-1] != '_')
218 && (field_name[0] != '\0')) {
219 strncat(basename, "_", PATH_MAX - basename_len);
220 basename_len = strlen(basename);
221 }
222 strncat(basename, field_name, PATH_MAX - basename_len);
223 }
224
225 print_tabs(tabs, fd);
226
227 switch(td->type) {
228 case INT_FIXED:
229 fprintf(fd, "%s", intOutputTypes[getSizeindex(td->size)]);
230 fprintf(fd, " lttng_param_%s", field_name);
231 break;
232 case UINT_FIXED:
233 fprintf(fd, "%s", uintOutputTypes[getSizeindex(td->size)]);
234 fprintf(fd, " lttng_param_%s", field_name);
235 break;
236 case CHAR:
237 fprintf(fd, "signed char");
238 fprintf(fd, " lttng_param_%s", field_name);
239 break;
240 case UCHAR:
241 fprintf(fd, "unsigned char");
242 fprintf(fd, " lttng_param_%s", field_name);
243 break;
244 case SHORT:
245 fprintf(fd, "short");
246 fprintf(fd, " lttng_param_%s", field_name);
247 break;
248 case USHORT:
249 fprintf(fd, "unsigned short");
250 fprintf(fd, " lttng_param_%s", field_name);
251 break;
252 case INT:
253 fprintf(fd, "int");
254 fprintf(fd, " lttng_param_%s", field_name);
255 break;
256 case UINT:
257 fprintf(fd, "unsigned int");
258 fprintf(fd, " lttng_param_%s", field_name);
259 break;
260 case FLOAT:
261 fprintf(fd, "%s", floatOutputTypes[getSizeindex(td->size)]);
262 fprintf(fd, " lttng_param_%s", field_name);
263 break;
264 case POINTER:
265 fprintf(fd, "const void *");
266 fprintf(fd, " lttng_param_%s", field_name);
267 break;
268 case LONG:
269 fprintf(fd, "long");
270 fprintf(fd, " lttng_param_%s", field_name);
271 break;
272 case ULONG:
273 fprintf(fd, "unsigned long");
274 fprintf(fd, " lttng_param_%s", field_name);
275 break;
276 case SIZE_T:
277 fprintf(fd, "size_t");
278 fprintf(fd, " lttng_param_%s", field_name);
279 break;
280 case SSIZE_T:
281 fprintf(fd, "ssize_t");
282 fprintf(fd, " lttng_param_%s", field_name);
283 break;
284 case OFF_T:
285 fprintf(fd, "off_t");
286 fprintf(fd, " lttng_param_%s", field_name);
287 break;
288 case STRING:
289 fprintf(fd, "const char *");
290 fprintf(fd, " lttng_param_%s", field_name);
291 break;
292 case ENUM:
293 fprintf(fd, "enum lttng_%s", basename);
294 fprintf(fd, " lttng_param_%s", field_name);
295 break;
296 case ARRAY:
297 fprintf(fd, "lttng_array_%s", basename);
298 fprintf(fd, " lttng_param_%s", field_name);
299 break;
300 case SEQUENCE:
301 fprintf(fd, "lttng_sequence_%s *", basename);
302 fprintf(fd, " lttng_param_%s", field_name);
303 break;
304 case STRUCT:
305 fprintf(fd, "struct lttng_%s *", basename);
306 fprintf(fd, " lttng_param_%s", field_name);
307 break;
308 case UNION:
309 fprintf(fd, "union lttng_%s *", basename);
310 fprintf(fd, " lttng_param_%s", field_name);
311 break;
312 default:
313 printf("print_type : unknown type\n");
314 return 1;
315 }
316
317 return 0;
318 }
319
320
321 /* Does the type has a fixed size ? (as know from the compiler)
322 *
323 * 1 : fixed size
324 * 0 : variable length
325 */
326 int has_type_fixed_size(type_descriptor_t *td)
327 {
328 switch(td->type) {
329 case INT_FIXED:
330 case UINT_FIXED:
331 case CHAR:
332 case UCHAR:
333 case SHORT:
334 case USHORT:
335 case INT:
336 case UINT:
337 case FLOAT:
338 case POINTER:
339 case LONG:
340 case ULONG:
341 case SIZE_T:
342 case SSIZE_T:
343 case OFF_T:
344 case ENUM:
345 case UNION: /* The union must have fixed size children. Must be checked by
346 the parser */
347 return 1;
348 break;
349 case STRING:
350 case SEQUENCE:
351 return 0;
352 break;
353 case STRUCT:
354 {
355 int has_type_fixed = 0;
356 for(unsigned int i=0;i<td->fields.position;i++){
357 field_t *field = (field_t*)(td->fields.array[i]);
358 type_descriptor_t *type = field->type;
359
360 has_type_fixed = has_type_fixed_size(type);
361 if(!has_type_fixed) return 0;
362 }
363 return 1;
364 }
365 break;
366 case ARRAY:
367 assert(td->size >= 0);
368 return has_type_fixed_size(((field_t*)td->fields.array[0])->type);
369 break;
370 case NONE:
371 printf("There is a type defined to NONE : bad.\n");
372 assert(0);
373 break;
374 }
375 return 0; //make gcc happy.
376 }
377
378
379
380
381
382 /* print type declaration.
383 *
384 * Copied from construct_types_and_fields in LTTV facility.c */
385
386 int print_type_declaration(type_descriptor_t * td, FILE *fd, unsigned int tabs,
387 char *nest_name, char *field_name)
388 {
389 char basename[PATH_MAX];
390 unsigned int basename_len = 0;
391
392 if(td->custom_write) return 0; /* Does print custom type */
393
394 strncpy(basename, nest_name, PATH_MAX);
395 basename_len = strlen(basename);
396
397 /* For a named type, we use the type_name directly */
398 if(td->type_name != NULL) {
399 strncpy(basename, td->type_name, PATH_MAX);
400 basename_len = strlen(basename);
401 } else {
402 /* For a unnamed type, there must be a field name, except for
403 * the array. */
404 if((basename_len != 0)
405 && (basename[basename_len-1] != '_'
406 && (field_name[0] != '\0'))) {
407 strncat(basename, "_", PATH_MAX - basename_len);
408 basename_len = strlen(basename);
409 }
410 strncat(basename, field_name, PATH_MAX - basename_len);
411 }
412
413 switch(td->type) {
414 case ENUM:
415 fprintf(fd, "enum lttng_%s", basename);
416 fprintf(fd, " {\n");
417 for(unsigned int i=0;i<td->labels.position;i++){
418 print_tabs(1, fd);
419 fprintf(fd, "LTTNG_%s = %d", ((char*)td->labels.array[i]),
420 (*(int*)td->labels_values.array[i]));
421 fprintf(fd, ",\n");
422 }
423 fprintf(fd, "};\n");
424 fprintf(fd, "\n");
425 break;
426
427 case ARRAY:
428 dprintf("%s\n", basename);
429 assert(td->size >= 0);
430 if(((field_t*)td->fields.array[0])->type->type_name == NULL) {
431 /* Not a named nested type : we must print its declaration first */
432 if(print_type_declaration(((field_t*)td->fields.array[0])->type,
433 fd, 0, basename, "")) return 1;
434 }
435 fprintf(fd, "#define LTTNG_ARRAY_SIZE_%s %zu\n", basename,
436 td->size);
437 fprintf(fd, "typedef ");
438 if(print_type(((field_t*)td->fields.array[0])->type,
439 fd, tabs, basename, "")) return 1;
440 fprintf(fd, " lttng_array_%s[LTTNG_ARRAY_SIZE_%s];\n", basename,
441 basename);
442 fprintf(fd, "\n");
443 break;
444 case SEQUENCE:
445 /* We assume that the sequence length type does not need to be declared.
446 */
447 if(((field_t*)td->fields.array[1])->type->type_name == NULL) {
448 /* Not a named nested type : we must print its declaration first */
449 if(print_type_declaration(((field_t*)td->fields.array[1])->type,
450 fd, 0, basename, "")) return 1;
451 }
452 fprintf(fd, "typedef struct lttng_sequence_%s lttng_sequence_%s;\n",
453 basename,
454 basename);
455 fprintf(fd, "struct lttng_sequence_%s", basename);
456 fprintf(fd, " {\n");
457 print_tabs(1, fd);
458 if(print_type(((field_t*)td->fields.array[0])->type,
459 fd, tabs, basename, "")) return 1;
460 fprintf(fd, " len;\n");
461 print_tabs(1, fd);
462 fprintf(fd, "const ");
463 if(print_type(((field_t*)td->fields.array[1])->type,
464 fd, tabs, basename, "")) return 1;
465 fprintf(fd, " *array;\n");
466 fprintf(fd, "};\n"); /* We do not LTT_ALIGN, because we never copy
467 it to the buffer directly. */
468 fprintf(fd, "\n");
469 break;
470
471 case STRUCT:
472 for(unsigned int i=0;i<td->fields.position;i++){
473 field_t *field = (field_t*)(td->fields.array[i]);
474 type_descriptor_t *type = field->type;
475 if(type->type_name == NULL) {
476 /* Not a named nested type : we must print its declaration first */
477 if(print_type_declaration(type,
478 fd, 0, basename, field->name)) return 1;
479 }
480 }
481 fprintf(fd, "struct lttng_%s", basename);
482 fprintf(fd, " {\n");
483 for(unsigned int i=0;i<td->fields.position;i++){
484 field_t *field = (field_t*)(td->fields.array[i]);
485 type_descriptor_t *type = field->type;
486 print_tabs(1, fd);
487 if(print_type(type, fd, tabs, basename, field->name)) return 1;
488 fprintf(fd, " ");
489 fprintf(fd, "%s", field->name);
490 fprintf(fd, ";\n");
491 }
492 if(td->fac->align)
493 fprintf(fd, "} LTT_ALIGN;\n");
494 else
495 fprintf(fd, "};\n");
496 fprintf(fd, "\n");
497 break;
498 case UNION:
499 for(unsigned int i=0;i<td->fields.position;i++){
500 field_t *field = (field_t*)(td->fields.array[i]);
501 type_descriptor_t *type = field->type;
502 if(type->type_name == NULL) {
503 /* Not a named nested type : we must print its declaration first */
504 if(print_type_declaration(type,
505 fd, 0, basename, field->name)) return 1;
506 }
507 }
508 fprintf(fd, "union lttng_%s", basename);
509 fprintf(fd, " {\n");
510 for(unsigned i=0;i<td->fields.position;i++){
511 field_t *field = (field_t*)(td->fields.array[i]);
512 type_descriptor_t *type = field->type;
513 print_tabs(1, fd);
514 if(print_type(type, fd, tabs, basename, field->name)) return 1;
515 fprintf(fd, " ");
516 fprintf(fd, "%s", field->name);
517 fprintf(fd, ";\n");
518 }
519 if(td->fac->align)
520 fprintf(fd, "} LTT_ALIGN;\n");
521 else
522 fprintf(fd, "};\n");
523 fprintf(fd, "\n");
524 break;
525 default:
526 dprintf("print_type_declaration : unknown type or nothing to declare.\n");
527 break;
528 }
529
530 return 0;
531 }
532
533
534 /* print type alignment.
535 *
536 * Copied from construct_types_and_fields in LTTV facility.c
537 *
538 * basename is the name which identifies the type (along with a prefix
539 * (possibly)). */
540
541 int print_type_alignment(type_descriptor_t * td, FILE *fd, unsigned int tabs,
542 char *nest_name, char *field_name, char *obj_prefix)
543 {
544 char basename[PATH_MAX];
545 unsigned int basename_len = 0;
546
547 strncpy(basename, nest_name, PATH_MAX);
548 basename_len = strlen(basename);
549
550 /* For a named type, we use the type_name directly */
551 if(td->type_name != NULL) {
552 strncpy(basename, td->type_name, PATH_MAX);
553 basename_len = strlen(basename);
554 } else {
555 /* For a unnamed type, there must be a field name, except for
556 * the array. */
557 if((basename_len != 0)
558 && (basename[basename_len-1] != '_'
559 && field_name != NULL
560 && (field_name[0] != '\0'))) {
561 strncat(basename, "_", PATH_MAX - basename_len);
562 basename_len = strlen(basename);
563 }
564 if(field_name != NULL)
565 strncat(basename, field_name, PATH_MAX - basename_len);
566 }
567
568 if(field_name[0] == '\0') {
569 /* We are in a write function : it's the obj that we must align. */
570 switch(td->type) {
571 case SEQUENCE:
572 fprintf(fd, "lttng_get_alignment_sequence_%s(%s)", basename,
573 obj_prefix);
574 break;
575 case STRUCT:
576 fprintf(fd, "lttng_get_alignment_struct_%s(%s)", basename,
577 obj_prefix);
578 break;
579 case UNION:
580 fprintf(fd, "lttng_get_alignment_union_%s(%s)", basename,
581 obj_prefix);
582 break;
583 case ARRAY:
584 fprintf(fd, "lttng_get_alignment_array_%s(%s)", basename,
585 obj_prefix);
586 case STRING:
587 fprintf(fd, "sizeof(char)");
588 break;
589 case INT_FIXED:
590 case UINT_FIXED:
591 case CHAR:
592 case UCHAR:
593 case SHORT:
594 case USHORT:
595 case INT:
596 case UINT:
597 case FLOAT:
598 case POINTER:
599 case LONG:
600 case ULONG:
601 case SIZE_T:
602 case SSIZE_T:
603 case OFF_T:
604 case ENUM:
605 fprintf(fd, "sizeof(");
606 if(print_type(td, fd, 0, basename, "")) return 1;
607 fprintf(fd, ")");
608 break;
609
610 default:
611 printf("error : type unexpected\n");
612 return 1;
613 break;
614 }
615 } else {
616
617 switch(td->type) {
618 case INT_FIXED:
619 case UINT_FIXED:
620 case CHAR:
621 case UCHAR:
622 case SHORT:
623 case USHORT:
624 case INT:
625 case UINT:
626 case FLOAT:
627 case POINTER:
628 case LONG:
629 case ULONG:
630 case SIZE_T:
631 case SSIZE_T:
632 case OFF_T:
633 case ENUM:
634 fprintf(fd, "sizeof(");
635 if(print_type(td, fd, 0, basename, "")) return 1;
636 fprintf(fd, ")");
637 break;
638 case STRING:
639 fprintf(fd, "sizeof(char)");
640 break;
641 case SEQUENCE:
642 fprintf(fd, "lttng_get_alignment_sequence_%s(&%s%s)", basename,
643 obj_prefix, field_name);
644 break;
645 case STRUCT:
646 fprintf(fd, "lttng_get_alignment_struct_%s(&%s%s)", basename,
647 obj_prefix, field_name);
648 break;
649 case UNION:
650 fprintf(fd, "lttng_get_alignment_union_%s(&%s%s)", basename,
651 obj_prefix, field_name);
652 break;
653 case ARRAY:
654 fprintf(fd, "lttng_get_alignment_array_%s(%s%s)", basename,
655 obj_prefix, field_name);
656 break;
657 case NONE:
658 printf("error : type NONE unexpected\n");
659 return 1;
660 break;
661 }
662 }
663
664 return 0;
665 }
666
667 /* print type write.
668 *
669 * Copied from construct_types_and_fields in LTTV facility.c
670 *
671 * basename is the name which identifies the type (along with a prefix
672 * (possibly)). */
673
674 int print_type_write(type_descriptor_t * td, FILE *fd, unsigned int tabs,
675 char *nest_name, char *field_name, char *obj_prefix, int get_ptr)
676 {
677 char basename[PATH_MAX];
678 unsigned int basename_len = 0;
679 char get_ptr_char[2] = "";
680 char custom[PATH_MAX] = "";
681
682 strncpy(basename, nest_name, PATH_MAX);
683 basename_len = strlen(basename);
684
685 /* For a named type, we use the type_name directly */
686 if(td->type_name != NULL) {
687 strncpy(basename, td->type_name, PATH_MAX);
688 basename_len = strlen(basename);
689 } else {
690 /* For a unnamed type, there must be a field name, except for
691 * the array. */
692 if((basename_len != 0)
693 && (basename[basename_len-1] != '_'
694 && (field_name[0] != '\0'))) {
695 strncat(basename, "_", PATH_MAX - basename_len);
696 basename_len = strlen(basename);
697 }
698 strncat(basename, field_name, PATH_MAX - basename_len);
699 }
700
701 if(get_ptr) {
702 strcpy(get_ptr_char, "&");
703 }
704
705 if(td->custom_write) {
706 strcpy(custom, "_custom");
707 }
708
709 switch(td->type) {
710 case INT_FIXED:
711 case UINT_FIXED:
712 case CHAR:
713 case UCHAR:
714 case SHORT:
715 case USHORT:
716 case INT:
717 case UINT:
718 case FLOAT:
719 case POINTER:
720 case LONG:
721 case ULONG:
722 case SIZE_T:
723 case SSIZE_T:
724 case OFF_T:
725 case ENUM:
726 print_tabs(tabs, fd);
727 fprintf(fd, "align = ");
728 if(td->fac->align) {
729 if(print_type_alignment(td, fd, 0, basename, "", "obj")) return 1;
730 } else
731 fprintf(fd, "0");
732 fprintf(fd, ";\n");
733 fprintf(fd, "\n");
734 print_tabs(tabs, fd);
735 fprintf(fd, "if (*len == 0) {\n");
736 print_tabs(tabs+1, fd);
737 fprintf(fd, "*to += ltt_align(*to, align); /* align output */\n");
738 print_tabs(tabs, fd);
739 fprintf(fd, "} else {\n");
740 print_tabs(tabs+1, fd);
741 fprintf(fd, "*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */\n");
742 print_tabs(tabs, fd);
743 fprintf(fd, "}\n");
744 fprintf(fd, "\n");
745
746 print_tabs(tabs, fd);
747 fprintf(fd, "*len += ");
748 fprintf(fd, "sizeof(");
749 if(print_type(td, fd, 0, basename, "")) return 1;
750 fprintf(fd, ");\n");
751
752 break;
753 case STRING:
754 print_tabs(tabs, fd);
755 fprintf(fd,
756 "lttng_write%s_string_%s(buffer, to_base, to, from, len, %s%s);\n",
757 custom, basename, obj_prefix, field_name);
758 break;
759 case SEQUENCE:
760 print_tabs(tabs, fd);
761 fprintf(fd,
762 "lttng_write%s_sequence_%s(buffer, to_base, to, from, len, %s%s%s);",
763 custom, basename, get_ptr_char, obj_prefix, field_name);
764 break;
765 case STRUCT:
766 print_tabs(tabs, fd);
767 fprintf(fd,
768 "lttng_write%s_struct_%s(buffer, to_base, to, from, len, %s%s%s);",
769 custom, basename, get_ptr_char, obj_prefix, field_name);
770 break;
771 case UNION:
772 print_tabs(tabs, fd);
773 fprintf(fd,
774 "lttng_write%s_union_%s(buffer, to_base, to, from, len, %s%s%s);",
775 custom, basename, get_ptr_char, obj_prefix, field_name);
776 break;
777 case ARRAY:
778 print_tabs(tabs, fd);
779 fprintf(fd,
780 "lttng_write%s_array_%s(buffer, to_base, to, from, len, %s%s);",
781 custom, basename, obj_prefix, field_name);
782 break;
783 case NONE:
784 printf("Error : type NONE unexpected\n");
785 return 1;
786 break;
787 }
788
789 return 0;
790 }
791
792 /* print need local vars ?.
793 *
794 * Copied from print_type_write
795 *
796 * Does the type_write call needs local size and from variables ?
797 * return value : 1 yes, 0 no.
798 */
799
800 int has_type_local(type_descriptor_t * td)
801 {
802 switch(td->type) {
803 case INT_FIXED:
804 case UINT_FIXED:
805 case CHAR:
806 case UCHAR:
807 case SHORT:
808 case USHORT:
809 case INT:
810 case UINT:
811 case FLOAT:
812 case POINTER:
813 case LONG:
814 case ULONG:
815 case SIZE_T:
816 case SSIZE_T:
817 case OFF_T:
818 case ENUM:
819 return 1;
820 break;
821 case STRING:
822 case SEQUENCE:
823 case STRUCT:
824 case UNION:
825 case ARRAY:
826 return 0;
827 break;
828 case NONE:
829 printf("Error : type NONE unexpected\n");
830 return 1;
831 break;
832 }
833
834 return 0;
835 }
836
837
838
839 /* print type alignment function.
840 *
841 * Copied from construct_types_and_fields in LTTV facility.c
842 *
843 * basename is the name which identifies the type (along with a prefix
844 * (possibly)). */
845
846 int print_type_alignment_fct(type_descriptor_t * td, FILE *fd,
847 unsigned int tabs,
848 char *nest_name, char *field_name)
849 {
850 char basename[PATH_MAX];
851 unsigned int basename_len = 0;
852
853 if(td->custom_write) return 0; /* Does print custom type */
854 if(td->fac->align == 0) return 0;
855
856 strncpy(basename, nest_name, PATH_MAX);
857 basename_len = strlen(basename);
858
859 /* For a named type, we use the type_name directly */
860 if(td->type_name != NULL) {
861 strncpy(basename, td->type_name, PATH_MAX);
862 basename_len = strlen(basename);
863 } else {
864 /* For a unnamed type, there must be a field name, except for
865 * the array. */
866 if((basename_len != 0)
867 && (basename[basename_len-1] != '_'
868 && (field_name[0] != '\0'))) {
869 strncat(basename, "_", PATH_MAX - basename_len);
870 basename_len = strlen(basename);
871 }
872 strncat(basename, field_name, PATH_MAX - basename_len);
873 }
874
875 switch(td->type) {
876 case SEQUENCE:
877 if(((field_t*)td->fields.array[1])->type->type_name == NULL) {
878 /* Not a named nested type : we must print its align fct */
879 if(print_type_alignment_fct(((field_t*)td->fields.array[1])->type, fd,
880 0, basename, "")) return 1;
881 }
882 /* Function header */
883 fprintf(fd, "static inline size_t lttng_get_alignment_sequence_%s(\n",
884 basename);
885 print_tabs(2, fd);
886 if(print_type(td, fd, 0, basename, "")) return 1;
887 fprintf(fd, " *obj)\n");
888 fprintf(fd, "{\n");
889 print_tabs(1, fd);
890 fprintf(fd, "size_t align=0, localign;");
891 fprintf(fd, "\n");
892 print_tabs(1, fd);
893 fprintf(fd, "localign = ");
894 if(print_type_alignment(((field_t*)td->fields.array[0])->type,
895 fd, 0, basename, "len", "obj->")) return 1;
896 fprintf(fd, ";\n");
897 print_tabs(1, fd);
898 fprintf(fd, "align = max(align, localign);\n");
899 fprintf(fd, "\n");
900 print_tabs(1, fd);
901 fprintf(fd, "localign = ");
902 if(print_type_alignment(((field_t*)td->fields.array[1])->type,
903 fd, 0, basename, "array[0]", "obj->")) return 1;
904 fprintf(fd, ";\n");
905 print_tabs(1, fd);
906 fprintf(fd, "align = max(align, localign);\n");
907 fprintf(fd, "\n");
908 print_tabs(1, fd);
909 fprintf(fd, "return align;\n");
910 break;
911 case STRUCT:
912 for(unsigned int i=0;i<td->fields.position;i++){
913 field_t *field = (field_t*)(td->fields.array[i]);
914 type_descriptor_t *type = field->type;
915 if(type->type_name == NULL) {
916 /* Not a named nested type : we must print its align fct */
917 if(print_type_alignment_fct(type, fd,
918 0, basename, field->name)) return 1;
919 }
920 }
921 /* Function header */
922 fprintf(fd, "static inline size_t lttng_get_alignment_struct_%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 UNION:
948 for(unsigned int i=0;i<td->fields.position;i++){
949 field_t *field = (field_t*)(td->fields.array[i]);
950 type_descriptor_t *type = field->type;
951 if(type->type_name == NULL) {
952 /* Not a named nested type : we must print its align fct */
953 if(print_type_alignment_fct(type, fd,
954 0, basename, field->name)) return 1;
955 }
956 }
957 /* Function header */
958 fprintf(fd, "static inline size_t lttng_get_alignment_union_%s(\n",
959 basename);
960 print_tabs(2, fd);
961 if(print_type(td, fd, 0, basename, "")) return 1;
962 fprintf(fd, " *obj)\n");
963 fprintf(fd, "{\n");
964 print_tabs(1, fd);
965 fprintf(fd, "size_t align=0, localign;");
966 fprintf(fd, "\n");
967 for(unsigned int i=0;i<td->fields.position;i++){
968 field_t *field = (field_t*)(td->fields.array[i]);
969 type_descriptor_t *type = field->type;
970 print_tabs(1, fd);
971 fprintf(fd, "localign = ");
972 if(print_type_alignment(type, fd, 0, basename, field->name, "obj->"))
973 return 1;
974 fprintf(fd, ";\n");
975 print_tabs(1, fd);
976 fprintf(fd, "align = max(align, localign);\n");
977 fprintf(fd, "\n");
978 }
979 print_tabs(1, fd);
980 fprintf(fd, "return align;\n");
981
982 break;
983 case ARRAY:
984 if(((field_t*)td->fields.array[0])->type->type_name == NULL) {
985 /* Not a named nested type : we must print its align fct */
986 if(print_type_alignment_fct(((field_t*)td->fields.array[0])->type, fd,
987 0, basename, "")) return 1;
988 }
989 /* Function header */
990 fprintf(fd, "static inline size_t lttng_get_alignment_array_%s(\n",
991 basename);
992 print_tabs(2, fd);
993 if(print_type(td, fd, 0, basename, "")) return 1;
994 fprintf(fd, " obj)\n");
995 fprintf(fd, "{\n");
996 print_tabs(1, fd);
997 fprintf(fd, "return \n");
998 if(print_type_alignment(((field_t*)td->fields.array[0])->type,
999 fd, 0, basename, "", "obj[0]"))
1000 return 1;
1001 fprintf(fd, ";\n");
1002 break;
1003 default:
1004 dprintf("print_type_alignment_fct : type has no alignment function.\n");
1005 return 0;
1006 break;
1007 }
1008
1009
1010 /* Function footer */
1011 fprintf(fd, "}\n");
1012 fprintf(fd, "\n");
1013
1014 return 0;
1015 }
1016
1017 /* print type write function.
1018 *
1019 * Copied from construct_types_and_fields in LTTV facility.c
1020 *
1021 * basename is the name which identifies the type (along with a prefix
1022 * (possibly)). */
1023
1024 int print_type_write_fct(type_descriptor_t * td, FILE *fd, unsigned int tabs,
1025 char *nest_name, char *field_name)
1026 {
1027 char basename[PATH_MAX];
1028 unsigned int basename_len = 0;
1029
1030 if(td->custom_write) return 0; /* Does print custom type */
1031
1032 strncpy(basename, nest_name, PATH_MAX);
1033 basename_len = strlen(basename);
1034
1035 /* For a named type, we use the type_name directly */
1036 if(td->type_name != NULL) {
1037 strncpy(basename, td->type_name, PATH_MAX);
1038 basename_len = strlen(basename);
1039 } else {
1040 /* For a unnamed type, there must be a field name, except for
1041 * the array. */
1042 if((basename_len != 0)
1043 && (basename[basename_len-1] != '_'
1044 && (field_name[0] != '\0'))) {
1045 strncat(basename, "_", PATH_MAX - basename_len);
1046 basename_len = strlen(basename);
1047 }
1048 strncat(basename, field_name, PATH_MAX - basename_len);
1049 }
1050
1051 switch(td->type) {
1052 case SEQUENCE:
1053 if(((field_t*)td->fields.array[1])->type->type_name == NULL) {
1054 /* Not a named nested type : we must print its write fct */
1055 if(print_type_write_fct(((field_t*)td->fields.array[1])->type, fd,
1056 0, basename, "")) return 1;
1057 }
1058 break;
1059 case STRUCT:
1060 for(unsigned int i=0;i<td->fields.position;i++){
1061 field_t *field = (field_t*)(td->fields.array[i]);
1062 type_descriptor_t *type = field->type;
1063 if(type->type_name == NULL) {
1064 /* Not a named nested type : we must print its write fct */
1065 if(print_type_write_fct(type, fd,
1066 0, basename, field->name)) return 1;
1067 }
1068 }
1069 break;
1070 case UNION:
1071 for(unsigned int i=0;i<td->fields.position;i++){
1072 field_t *field = (field_t*)(td->fields.array[i]);
1073 type_descriptor_t *type = field->type;
1074 if(type->type_name == NULL) {
1075 /* Not a named nested type : we must print its write fct */
1076 if(print_type_write_fct(type, fd,
1077 0, basename, field->name)) return 1;
1078 }
1079 }
1080 break;
1081 case ARRAY:
1082 if(((field_t*)td->fields.array[0])->type->type_name == NULL) {
1083 /* Not a named nested type : we must print its write fct */
1084 if(print_type_write_fct(((field_t*)td->fields.array[0])->type, fd,
1085 0, basename, "")) return 1;
1086 }
1087 break;
1088 case STRING:
1089 break;
1090 default:
1091 dprintf("print_type_write_fct : type has no write function.\n");
1092 return 0;
1093 break;
1094 }
1095
1096 /* Print header */
1097 switch(td->type) {
1098 case SEQUENCE:
1099 fprintf(fd, "static inline void lttng_write_sequence_%s(\n",
1100 basename);
1101 break;
1102 case STRUCT:
1103 fprintf(fd, "static inline void lttng_write_struct_%s(\n", basename);
1104 break;
1105 case UNION:
1106 fprintf(fd, "static inline void lttng_write_union_%s(\n", basename);
1107 break;
1108 case ARRAY:
1109 fprintf(fd, "static inline void lttng_write_array_%s(\n", basename);
1110 break;
1111 case STRING:
1112 fprintf(fd, "static inline void lttng_write_string_%s(\n", basename);
1113 break;
1114 default:
1115 printf("print_type_write_fct : type has no write function.\n");
1116 break;
1117 }
1118
1119 print_tabs(2, fd);
1120 fprintf(fd, "char *buffer,\n");
1121 print_tabs(2, fd);
1122 fprintf(fd, "size_t *to_base,\n");
1123 print_tabs(2, fd);
1124 fprintf(fd, "size_t *to,\n");
1125 print_tabs(2, fd);
1126 fprintf(fd, "const char **from,\n");
1127 print_tabs(2, fd);
1128 fprintf(fd, "size_t *len,\n");
1129 print_tabs(2, fd);
1130 if(print_type(td, fd, 0, basename, "")) return 1;
1131
1132 switch(td->type) {
1133 case SEQUENCE:
1134 fprintf(fd, " *obj)\n");
1135 break;
1136 case STRUCT:
1137 fprintf(fd, " *obj)\n");
1138 break;
1139 case UNION:
1140 fprintf(fd, " *obj)\n");
1141 break;
1142 case ARRAY:
1143 fprintf(fd, " obj)\n");
1144 break;
1145 case STRING:
1146 fprintf(fd, " obj)\n");
1147 break;
1148 default:
1149 printf("print_type_write_fct : type has no write function.\n");
1150 break;
1151 }
1152
1153 fprintf(fd, "{\n");
1154
1155 switch(td->type) {
1156 case STRING:
1157 print_tabs(1, fd);
1158 fprintf(fd, "size_t size;\n");
1159 break;
1160 default:
1161 break;
1162 }
1163
1164 print_tabs(1, fd);
1165 fprintf(fd, "size_t align;\n");
1166 fprintf(fd, "\n");
1167
1168 switch(td->type) {
1169 case SEQUENCE:
1170 case STRING:
1171 print_tabs(1, fd);
1172 fprintf(fd, "/* Flush pending memcpy */\n");
1173 print_tabs(1, fd);
1174 fprintf(fd, "if (*len != 0) {\n");
1175 print_tabs(2, fd);
1176 fprintf(fd, "if (buffer != NULL)\n");
1177 print_tabs(3, fd);
1178 fprintf(fd, "memcpy(buffer+*to_base+*to, *from, *len);\n");
1179 print_tabs(1, fd);
1180 fprintf(fd, "}\n");
1181 print_tabs(1, fd);
1182 fprintf(fd, "*to += *len;\n");
1183 print_tabs(1, fd);
1184 fprintf(fd, "*len = 0;\n");
1185 fprintf(fd, "\n");
1186 break;
1187 case STRUCT:
1188 case UNION:
1189 case ARRAY:
1190 break;
1191 default:
1192 printf("print_type_write_fct : type has no write function.\n");
1193 break;
1194 }
1195
1196 print_tabs(1, fd);
1197 fprintf(fd, "align = ");
1198 if(td->fac->align) {
1199 if(print_type_alignment(td, fd, 0, basename, "", "obj")) return 1;
1200 } else
1201 fprintf(fd, "0");
1202 fprintf(fd, ";\n");
1203 fprintf(fd, "\n");
1204 print_tabs(1, fd);
1205 fprintf(fd, "if (*len == 0) {\n");
1206 print_tabs(2, fd);
1207 fprintf(fd, "*to += ltt_align(*to, align); /* align output */\n");
1208 print_tabs(1, fd);
1209 fprintf(fd, "} else {\n");
1210 print_tabs(2, fd);
1211 fprintf(fd, "*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */\n");
1212 print_tabs(1, fd);
1213 fprintf(fd, "}\n");
1214 fprintf(fd, "\n");
1215
1216 /* First, check if the type has a fixed size. If it is the case, then the size
1217 * to write is know by the compiler : simply use a sizeof() */
1218 if(has_type_fixed_size(td)) {
1219 print_tabs(1, fd);
1220 fprintf(fd, "/* Contains only fixed size fields : use compiler sizeof() */\n");
1221 fprintf(fd, "\n");
1222 print_tabs(1, fd);
1223 fprintf(fd, "*len += sizeof(");
1224 if(print_type(td, fd, 0, basename, field_name)) return 1;
1225 fprintf(fd, ");\n");
1226 } else {
1227 /* The type contains nested variable size subtypes :
1228 * we must write field by field. */
1229 print_tabs(1, fd);
1230 fprintf(fd, "/* Contains variable sized fields : must explode the structure */\n");
1231 fprintf(fd, "\n");
1232
1233 switch(td->type) {
1234 case SEQUENCE:
1235 print_tabs(1, fd);
1236 fprintf(fd, "/* Copy members */\n");
1237 // print_tabs(1, fd);
1238 // fprintf(fd, "size = sizeof(\n");
1239 if(print_type_write(((field_t*)td->fields.array[0])->type,
1240 fd, 1, basename, "len", "obj->", 1)) return 1;
1241 fprintf(fd, "\n");
1242 // fprintf(fd, ");\n");
1243 // print_tabs(1, fd);
1244 // fprintf(fd, "*to += ltt_align(*to, size);\n");
1245 print_tabs(1, fd);
1246 fprintf(fd, "if (buffer != NULL)\n");
1247 print_tabs(2, fd);
1248 fprintf(fd, "memcpy(buffer+*to_base+*to, &obj->len, *len);\n");
1249 print_tabs(1, fd);
1250 fprintf(fd, "*to += *len;\n");
1251 print_tabs(1, fd);
1252 fprintf(fd, "*len = 0;\n");
1253 fprintf(fd, "\n");
1254
1255 /* Write the child : varlen child or not ? */
1256 if(has_type_fixed_size(((field_t*)td->fields.array[1])->type)) {
1257 /* Fixed size len child : use a multiplication of its size */
1258 // print_tabs(1, fd);
1259 // fprintf(fd, "size = sizeof(\n");
1260
1261 //print_tabs(1, fd);
1262 /* We know that *len does not contain alignment because of the
1263 * previous align output. len is always 0 here. */
1264 if(print_type_write(((field_t*)td->fields.array[1])->type,
1265 fd, 1, basename, "array[0]", "obj->", 1))
1266 return 1;
1267 // fprintf(fd, ");\n");
1268 fprintf(fd, "\n");
1269 print_tabs(1, fd);
1270 fprintf(fd, "*len = obj->len * (*len);\n");
1271 print_tabs(1, fd);
1272 fprintf(fd, "if (buffer != NULL)\n");
1273 print_tabs(2, fd);
1274 fprintf(fd, "memcpy(buffer+*to_base+*to, obj->array, *len);\n");
1275 print_tabs(1, fd);
1276 fprintf(fd, "*to += *len;\n");
1277 print_tabs(1, fd);
1278 fprintf(fd, "*len = 0;\n");
1279 fprintf(fd, "\n");
1280 } else {
1281 print_tabs(1, fd);
1282 fprintf(fd, "/* Variable length child : iter. */\n");
1283 print_tabs(1, fd);
1284 fprintf(fd, "for (unsigned int i = 0; i < obj->len; i++) {\n");
1285 if(print_type_write(((field_t*)td->fields.array[1])->type,
1286 fd, 2, basename, "array[i]", "obj->", 1)) return 1;
1287 print_tabs(1, fd);
1288 fprintf(fd, "}\n");
1289 }
1290 fprintf(fd, "\n");
1291 print_tabs(1, fd);
1292 fprintf(fd, "/* Realign the *to_base on arch size, set *to to 0 */\n");
1293 print_tabs(1, fd);
1294 if(td->fac->align)
1295 fprintf(fd, "*to += ltt_align(*to, sizeof(void *));\n");
1296 print_tabs(1, fd);
1297 fprintf(fd, "*to_base = *to_base+*to;\n");
1298 print_tabs(1, fd);
1299 fprintf(fd, "*to = 0;\n");
1300 fprintf(fd, "\n");
1301 print_tabs(1, fd);
1302 fprintf(fd, "/* Put source *from just after the C sequence */\n");
1303 print_tabs(1, fd);
1304 fprintf(fd, "*from = (const char*)(obj+1);\n");
1305 break;
1306 case STRING:
1307 print_tabs(1, fd);
1308 fprintf(fd, "size = strlen(obj) + 1; /* Include final NULL char. */\n");
1309 print_tabs(1, fd);
1310 fprintf(fd, "if (buffer != NULL)\n");
1311 print_tabs(2, fd);
1312 fprintf(fd, "memcpy(buffer+*to_base+*to, obj, size);\n");
1313 print_tabs(1, fd);
1314 fprintf(fd, "*to += size;\n");
1315 fprintf(fd, "\n");
1316 print_tabs(1, fd);
1317 fprintf(fd, "/* Realign the *to_base on arch size, set *to to 0 */\n");
1318 print_tabs(1, fd);
1319 if(td->fac->align)
1320 fprintf(fd, "*to += ltt_align(*to, sizeof(void *));\n");
1321 print_tabs(1, fd);
1322 fprintf(fd, "*to_base = *to_base+*to;\n");
1323 print_tabs(1, fd);
1324 fprintf(fd, "*to = 0;\n");
1325 fprintf(fd, "\n");
1326 print_tabs(1, fd);
1327 fprintf(fd, "/* Put source *from just after the C string */\n");
1328 print_tabs(1, fd);
1329 fprintf(fd, "*from += size;\n");
1330 break;
1331 case STRUCT:
1332 for(unsigned int i=0;i<td->fields.position;i++){
1333 field_t *field = (field_t*)(td->fields.array[i]);
1334 type_descriptor_t *type = field->type;
1335 if(print_type_write(type,
1336 fd, 1, basename, field->name, "obj->", 1)) return 1;
1337 fprintf(fd, "\n");
1338 }
1339 break;
1340 case UNION:
1341 printf("ERROR : A union CANNOT contain a variable size child.\n");
1342 return 1;
1343 break;
1344 case ARRAY:
1345 /* Write the child : varlen child or not ? */
1346 if(has_type_fixed_size(((field_t*)td->fields.array[0])->type)) {
1347 /* Error : if an array has a variable size, then its child must also
1348 * have a variable size. */
1349 assert(0);
1350 } else {
1351 print_tabs(1, fd);
1352 fprintf(fd, "/* Variable length child : iter. */\n");
1353 print_tabs(1, fd);
1354 fprintf(fd, "for (unsigned int i = 0; i < LTTNG_ARRAY_SIZE_%s; i++) {\n", basename);
1355 if(print_type_write(((field_t*)td->fields.array[0])->type,
1356 fd, 2, basename, "", "obj->array[i]", 1)) return 1;
1357 print_tabs(1, fd);
1358 fprintf(fd, "}\n");
1359 }
1360 break;
1361 default:
1362 printf("print_type_write_fct : type has no write function.\n");
1363 break;
1364 }
1365
1366
1367 }
1368
1369
1370 /* Function footer */
1371 fprintf(fd, "}\n");
1372 fprintf(fd, "\n");
1373 return 0;
1374 }
1375
1376
1377
1378 /* Print the logging function of an event. This is the core of genevent */
1379 int print_event_logging_function(char *basename, facility_t *fac,
1380 event_t *event, FILE *fd)
1381 {
1382 fprintf(fd, "static inline void trace_%s(\n", basename);
1383 int has_argument = 0;
1384 int has_type_fixed = 0;
1385
1386 /* Does it support per trace tracing ? */
1387 if(event->per_trace) {
1388 print_tabs(2, fd);
1389 fprintf(fd, "struct ltt_trace_struct *dest_trace");
1390 has_argument = 1;
1391 }
1392
1393 /* Does it support per tracefile tracing ? */
1394 if(event->per_tracefile) {
1395 if(has_argument) {
1396 fprintf(fd, ",");
1397 fprintf(fd, "\n");
1398 }
1399 fprintf(fd, "unsigned int tracefile_index");
1400 has_argument = 1;
1401 }
1402
1403 for(unsigned int j = 0; j < event->fields.position; j++) {
1404 /* For each field, print the function argument */
1405 field_t *f = (field_t*)event->fields.array[j];
1406 type_descriptor_t *t = f->type;
1407 if(has_argument) {
1408 fprintf(fd, ",");
1409 fprintf(fd, "\n");
1410 }
1411 if(print_arg(t, fd, 2, basename, f->name)) return 1;
1412 has_argument = 1;
1413 }
1414 if(!has_argument) {
1415 print_tabs(2, fd);
1416 fprintf(fd, "void");
1417 }
1418 fprintf(fd,")\n");
1419 #if 0
1420 fprintf(fd,
1421 "#if (!defined(CONFIG_LTT) || (!defined(CONFIG_LTT_FACILITY_%s) && !defined(CONFIG_LTT_FACILITY_%s_MODULE)))\n",
1422 fac->capname, fac->capname);
1423 fprintf(fd, "{\n");
1424 fprintf(fd, "}\n");
1425 fprintf(fd,"#else\n");
1426 #endif //0
1427 fprintf(fd, "{\n");
1428 /* Print the function variables */
1429 print_tabs(1, fd);
1430 fprintf(fd, "unsigned int index;\n");
1431 print_tabs(1, fd);
1432 fprintf(fd, "struct ltt_channel_struct *channel;\n");
1433 print_tabs(1, fd);
1434 fprintf(fd, "struct ltt_trace_struct *trace;\n");
1435 print_tabs(1, fd);
1436 fprintf(fd, "void *transport_data;\n");
1437 print_tabs(1, fd);
1438 fprintf(fd, "char *buffer = NULL;\n");
1439 print_tabs(1, fd);
1440 fprintf(fd, "size_t real_to_base = 0; /* The buffer is allocated on arch_size alignment */\n");
1441 print_tabs(1, fd);
1442 fprintf(fd, "size_t *to_base = &real_to_base;\n");
1443 print_tabs(1, fd);
1444 fprintf(fd, "size_t real_to = 0;\n");
1445 print_tabs(1, fd);
1446 fprintf(fd, "size_t *to = &real_to;\n");
1447 print_tabs(1, fd);
1448 fprintf(fd, "size_t real_len = 0;\n");
1449 print_tabs(1, fd);
1450 fprintf(fd, "size_t *len = &real_len;\n");
1451 print_tabs(1, fd);
1452 fprintf(fd, "size_t reserve_size;\n");
1453 print_tabs(1, fd);
1454 fprintf(fd, "size_t slot_size;\n");
1455 print_tabs(1, fd);
1456
1457 if(event->fields.position > 0) {
1458 for(unsigned int i=0;i<event->fields.position;i++){
1459 /* Search for at least one child with fixed size. It means
1460 * we need local variables.*/
1461 field_t *field = (field_t*)(event->fields.array[i]);
1462 type_descriptor_t *type = field->type;
1463 has_type_fixed = has_type_local(type);
1464 if(has_type_fixed) break;
1465 }
1466
1467 if(has_type_fixed) {
1468 fprintf(fd, "size_t align;\n");
1469 print_tabs(1, fd);
1470 }
1471
1472 fprintf(fd, "const char *real_from;\n");
1473 print_tabs(1, fd);
1474 fprintf(fd, "const char **from = &real_from;\n");
1475 print_tabs(1, fd);
1476 }
1477 fprintf(fd, "u64 tsc;\n");
1478 print_tabs(1, fd);
1479 fprintf(fd, "size_t before_hdr_pad, after_hdr_pad, header_size;\n");
1480 fprintf(fd, "\n");
1481
1482 if(!event->force) {
1483 print_tabs(1, fd);
1484 fprintf(fd, "if (ltt_traces.num_active_traces == 0)\n");
1485 print_tabs(2, fd);
1486 fprintf(fd, "return;\n");
1487 fprintf(fd, "\n");
1488 }
1489
1490 /* Calculate event variable len + event data alignment offset.
1491 * Assume that the padding for alignment starts at a void*
1492 * address.
1493 * This excludes the header size and alignment. */
1494
1495 print_tabs(1, fd);
1496 fprintf(fd, "/* For each field, calculate the field size. */\n");
1497 print_tabs(1, fd);
1498 fprintf(fd, "/* size = *to_base + *to + *len */\n");
1499 print_tabs(1, fd);
1500 fprintf(fd, "/* Assume that the padding for alignment starts at a\n");
1501 print_tabs(1, fd);
1502 fprintf(fd, " * sizeof(void *) address. */\n");
1503 fprintf(fd, "\n");
1504
1505 for(unsigned int i=0;i<event->fields.position;i++){
1506 field_t *field = (field_t*)(event->fields.array[i]);
1507 type_descriptor_t *type = field->type;
1508 /* Set from */
1509 print_tabs(1, fd);
1510 switch(type->type) {
1511 case SEQUENCE:
1512 case UNION:
1513 case ARRAY:
1514 case STRUCT:
1515 case STRING:
1516 fprintf(fd, "*from = (const char*)lttng_param_%s;\n", field->name);
1517 break;
1518 default:
1519 fprintf(fd, "*from = (const char*)&lttng_param_%s;\n", field->name);
1520 break;
1521 }
1522
1523 if(print_type_write(type,
1524 fd, 1, basename, field->name, "lttng_param_", 0)) return 1;
1525 fprintf(fd, "\n");
1526 }
1527 print_tabs(1, fd);
1528 fprintf(fd, "reserve_size = *to_base + *to + *len;\n");
1529
1530 /* Take locks : make sure the trace does not vanish while we write on
1531 * it. A simple preemption disabling is enough (using rcu traces). */
1532 print_tabs(1, fd);
1533 fprintf(fd, "preempt_disable();\n");
1534 print_tabs(1, fd);
1535 fprintf(fd, "ltt_nesting[smp_processor_id()]++;\n");
1536
1537 /* Get facility index */
1538
1539 if(event->per_tracefile) {
1540 print_tabs(1, fd);
1541 fprintf(fd, "index = tracefile_index;\n");
1542 } else {
1543 print_tabs(1, fd);
1544 fprintf(fd,
1545 "index = ltt_get_index_from_facility_%s(" \
1546 "\t\t\t\t\t\tevent_%s_%s);\n",
1547 fac->name, fac->name, event->name);
1548 }
1549 fprintf(fd,"\n");
1550
1551
1552 /* For each trace */
1553 print_tabs(1, fd);
1554 fprintf(fd, "list_for_each_entry_rcu(trace, &ltt_traces.head, list) {\n");
1555 if(!event->force) {
1556 print_tabs(2, fd);
1557 fprintf(fd, "if (!trace->active)\n");
1558 print_tabs(3, fd);
1559 fprintf(fd, "continue;\n\n");
1560 }
1561
1562 if(event->per_trace) {
1563 print_tabs(2, fd);
1564 fprintf(fd, "if (dest_trace != trace)\n");
1565 print_tabs(3, fd);
1566 fprintf(fd, "continue;\n\n");
1567 }
1568
1569 print_tabs(2, fd);
1570 fprintf(fd, "channel = ltt_get_channel_from_index(trace, index);\n");
1571 fprintf(fd, "\n");
1572
1573
1574 /* Relay reserve */
1575 /* If error, increment event lost counter (done by ltt_reserve_slot) and
1576 * return */
1577 print_tabs(2, fd);
1578 fprintf(fd, "slot_size = 0;\n");
1579 print_tabs(2, fd);
1580 fprintf(fd, "buffer = ltt_reserve_slot(trace, channel, &transport_data,\n");
1581 print_tabs(3, fd);
1582 fprintf(fd, "reserve_size, &slot_size, &tsc,\n");
1583 print_tabs(3, fd);
1584 fprintf(fd, "&before_hdr_pad, &after_hdr_pad, &header_size);\n");
1585 /* If error, return */
1586 print_tabs(2, fd);
1587 fprintf(fd, "if (!buffer)\n");
1588 print_tabs(3, fd);
1589 fprintf(fd, "continue; /* buffer full */\n\n");
1590 //print_tabs(2, fd);
1591 // for DEBUG only
1592 // fprintf(fd, "goto commit; /* DEBUG : never actually write. */\n\n");
1593 print_tabs(2, fd);
1594 fprintf(fd, "*to_base = *to = *len = 0;\n");
1595 fprintf(fd, "\n");
1596
1597 /* Write event header */
1598 if(strcmp("compact", fac->name) != 0) {
1599 print_tabs(2, fd);
1600 fprintf(fd, "ltt_write_event_header(trace, channel, buffer,\n");
1601 print_tabs(3, fd);
1602 fprintf(fd, "ltt_facility_%s_%X, event_%s_%s,\n", fac->name, fac->checksum,
1603 fac->name, event->name);
1604 print_tabs(3, fd);
1605 fprintf(fd, "reserve_size, before_hdr_pad, tsc);\n");
1606 } else {
1607 print_tabs(2, fd);
1608 fprintf(fd, "ltt_write_compact_header(trace, channel, buffer,\n");
1609 print_tabs(3, fd);
1610 fprintf(fd, "ltt_facility_%s_%X, event_%s_%s,\n", fac->name, fac->checksum,
1611 fac->name, event->name);
1612 print_tabs(3, fd);
1613 fprintf(fd, "reserve_size, before_hdr_pad, tsc, compact_data);\n");
1614 }
1615 print_tabs(2, fd);
1616 fprintf(fd, "*to_base += before_hdr_pad + after_hdr_pad + header_size;\n");
1617 fprintf(fd, "\n");
1618
1619 /* write data. */
1620
1621 for(unsigned int i=0;i<event->fields.position;i++){
1622 field_t *field = (field_t*)(event->fields.array[i]);
1623 type_descriptor_t *type = field->type;
1624
1625 /* Set from */
1626 print_tabs(2, fd);
1627 switch(type->type) {
1628 case SEQUENCE:
1629 case UNION:
1630 case ARRAY:
1631 case STRUCT:
1632 case STRING:
1633 fprintf(fd, "*from = (const char*)lttng_param_%s;\n", field->name);
1634 break;
1635 default:
1636 fprintf(fd, "*from = (const char*)&lttng_param_%s;\n", field->name);
1637 break;
1638 }
1639
1640
1641 if(print_type_write(type,
1642 fd, 2, basename, field->name, "lttng_param_", 0)) return 1;
1643 fprintf(fd, "\n");
1644
1645 /* Don't forget to flush pending memcpy */
1646 print_tabs(2, fd);
1647 fprintf(fd, "/* Flush pending memcpy */\n");
1648 print_tabs(2, fd);
1649 fprintf(fd, "if (*len != 0) {\n");
1650 print_tabs(3, fd);
1651 fprintf(fd, "memcpy(buffer+*to_base+*to, *from, *len);\n");
1652 print_tabs(3, fd);
1653 fprintf(fd, "*to += *len;\n");
1654 //print_tabs(3, fd);
1655 //fprintf(fd, "from += len;\n");
1656 print_tabs(3, fd);
1657 fprintf(fd, "*len = 0;\n");
1658 print_tabs(2, fd);
1659 fprintf(fd, "}\n");
1660 fprintf(fd, "\n");
1661 }
1662
1663
1664 /* commit */
1665 // for DEBUG only.
1666 //fprintf(fd, "commit:\n"); /* DEBUG! */
1667 print_tabs(2, fd);
1668 fprintf(fd, "ltt_commit_slot(channel, &transport_data, buffer, slot_size);\n\n");
1669
1670 print_tabs(1, fd);
1671 fprintf(fd, "}\n\n");
1672
1673 /* Release locks */
1674 print_tabs(1, fd);
1675 fprintf(fd, "ltt_nesting[smp_processor_id()]--;\n");
1676 print_tabs(1, fd);
1677 fprintf(fd, "preempt_enable();\n");
1678
1679 fprintf(fd, "}\n");
1680 #if 0
1681 fprintf(fd, "#endif //(!defined(CONFIG_LTT) || (!defined(CONFIG_LTT_FACILITY_%s) && !defined(CONFIG_LTT_FACILITY_%s_MODULE)))\n\n",
1682 fac->capname, fac->capname);
1683 #endif //0
1684 return 0;
1685 }
1686
1687 int print_event_logging_function_header_user_generic(char *basename, facility_t *fac,
1688 event_t *event, FILE *fd, enum user_fct_types fct_type)
1689 {
1690 char *attrib;
1691
1692 if(event->no_instrument_function && fct_type == USER_FCT_PROTO) {
1693 attrib = "__attribute__((no_instrument_function)) ";
1694 } else {
1695 attrib = "";
1696 }
1697 if(event->param_buffer) {
1698 fprintf(fd, "static inline %sint trace_%s_param_buffer(\n", attrib, basename);
1699 } else {
1700 fprintf(fd, "static inline %sint trace_%s(\n",attrib, basename);
1701 }
1702 int has_argument = 0;
1703
1704 if(event->param_buffer) {
1705 if(has_argument) {
1706 fprintf(fd, ",");
1707 fprintf(fd, "\n");
1708 }
1709 print_tabs(2, fd);
1710 fprintf(fd, "char *buffer");
1711 has_argument = 1;
1712 fprintf(fd, ",");
1713 fprintf(fd, "\n");
1714 print_tabs(2, fd);
1715 fprintf(fd, "size_t reserve_size");
1716 } else {
1717 for(unsigned int j = 0; j < event->fields.position; j++) {
1718 /* For each field, print the function argument */
1719 field_t *f = (field_t*)event->fields.array[j];
1720 type_descriptor_t *t = f->type;
1721 if(has_argument) {
1722 fprintf(fd, ",");
1723 fprintf(fd, "\n");
1724 }
1725 if(print_arg(t, fd, 2, basename, f->name)) return 1;
1726 has_argument = 1;
1727 }
1728 }
1729 if(!has_argument) {
1730 print_tabs(2, fd);
1731 fprintf(fd, "void");
1732 }
1733 fprintf(fd,")");
1734 return 0;
1735 }
1736
1737
1738 /* print_event_logging_function_user_generic
1739 * Print the logging function of an event for userspace tracing. This is the
1740 * core of genevent */
1741 int print_event_logging_function_user_generic(char *basename, facility_t *fac,
1742 event_t *event, FILE *fd)
1743 {
1744 int has_type_fixed = 0;
1745
1746 if(print_event_logging_function_header_user_generic(basename, fac, event, fd, USER_FCT_PROTO)) return 1;
1747 fprintf(fd,";\n");
1748 fprintf(fd,"\n");
1749 fprintf(fd, "#ifndef LTT_TRACE_FAST\n");
1750 if(print_event_logging_function_header_user_generic(basename, fac, event, fd, USER_FCT_DECLARATION)) return 1;
1751 fprintf(fd,"\n");
1752 fprintf(fd,
1753 "#ifndef LTT_TRACE\n");
1754 fprintf(fd, "{\n");
1755 fprintf(fd, "}\n");
1756 fprintf(fd,"#else\n");
1757 fprintf(fd, "{\n");
1758 /* Print the function variables */
1759 print_tabs(1, fd);
1760 fprintf(fd, "int ret = 0;\n");
1761 if(event->param_buffer) {
1762 //FIX print_tabs(1, fd);
1763 //fprintf(fd, "reserve_size = ltt_align(reserve_size, sizeof(void *));\n");
1764 print_tabs(1, fd);
1765 fprintf(fd, "{\n");
1766 goto do_syscall;
1767 }
1768 print_tabs(1, fd);
1769 fprintf(fd, "char *buffer = NULL;\n");
1770 print_tabs(1, fd);
1771 fprintf(fd, "size_t real_to_base = 0; /* The buffer is allocated on arch_size alignment */\n");
1772 print_tabs(1, fd);
1773 fprintf(fd, "size_t *to_base = &real_to_base;\n");
1774 print_tabs(1, fd);
1775 fprintf(fd, "size_t real_to = 0;\n");
1776 print_tabs(1, fd);
1777 fprintf(fd, "size_t *to = &real_to;\n");
1778 print_tabs(1, fd);
1779 fprintf(fd, "size_t real_len = 0;\n");
1780 print_tabs(1, fd);
1781 fprintf(fd, "size_t *len = &real_len;\n");
1782 print_tabs(1, fd);
1783 fprintf(fd, "size_t reserve_size;\n");
1784 print_tabs(1, fd);
1785 fprintf(fd, "size_t slot_size;\n");
1786 print_tabs(1, fd);
1787
1788 if(event->fields.position > 0) {
1789 for(unsigned int i=0;i<event->fields.position;i++){
1790 /* Search for at least one child with fixed size. It means
1791 * we need local variables.*/
1792 field_t *field = (field_t*)(event->fields.array[i]);
1793 type_descriptor_t *type = field->type;
1794 has_type_fixed = has_type_local(type);
1795 if(has_type_fixed) break;
1796 }
1797
1798 if(has_type_fixed) {
1799 fprintf(fd, "size_t align;\n");
1800 print_tabs(1, fd);
1801 }
1802
1803 fprintf(fd, "const char *real_from;\n");
1804 print_tabs(1, fd);
1805 fprintf(fd, "const char **from = &real_from;\n");
1806 print_tabs(1, fd);
1807 }
1808
1809 /* Calculate event variable len + event data alignment offset.
1810 * Assume that the padding for alignment starts at a void*
1811 * address.
1812 * This excludes the header size and alignment. */
1813
1814 print_tabs(1, fd);
1815 fprintf(fd, "/* For each field, calculate the field size. */\n");
1816 print_tabs(1, fd);
1817 fprintf(fd, "/* size = *to_base + *to + *len */\n");
1818 print_tabs(1, fd);
1819 fprintf(fd, "/* Assume that the padding for alignment starts at a\n");
1820 print_tabs(1, fd);
1821 fprintf(fd, " * sizeof(void *) address. */\n");
1822 fprintf(fd, "\n");
1823
1824 for(unsigned int i=0;i<event->fields.position;i++){
1825 field_t *field = (field_t*)(event->fields.array[i]);
1826 type_descriptor_t *type = field->type;
1827 /* Set from */
1828 print_tabs(1, fd);
1829 switch(type->type) {
1830 case SEQUENCE:
1831 case UNION:
1832 case ARRAY:
1833 case STRUCT:
1834 case STRING:
1835 fprintf(fd, "*from = (const char*)lttng_param_%s;\n", field->name);
1836 break;
1837 default:
1838 fprintf(fd, "*from = (const char*)&lttng_param_%s;\n", field->name);
1839 break;
1840 }
1841
1842 if(print_type_write(type,
1843 fd, 1, basename, field->name, "lttng_param_", 0)) return 1;
1844 fprintf(fd, "\n");
1845 }
1846 print_tabs(1, fd);
1847 fprintf(fd, "reserve_size = *to_base + *to + *len;\n");
1848
1849 print_tabs(1, fd);
1850 fprintf(fd, "{\n");
1851 print_tabs(2, fd);
1852 fprintf(fd, "char stack_buffer[reserve_size];\n");
1853 print_tabs(2, fd);
1854 fprintf(fd, "buffer = stack_buffer;\n");
1855 fprintf(fd, "\n");
1856
1857
1858 //print_tabs(2, fd);
1859 // for DEBUG only
1860 // fprintf(fd, "goto commit; /* DEBUG : never actually write. */\n\n");
1861 print_tabs(2, fd);
1862 fprintf(fd, "*to_base = *to = *len = 0;\n");
1863 fprintf(fd, "\n");
1864
1865 /* write data. */
1866
1867 for(unsigned int i=0;i<event->fields.position;i++){
1868 field_t *field = (field_t*)(event->fields.array[i]);
1869 type_descriptor_t *type = field->type;
1870
1871 /* Set from */
1872 print_tabs(2, fd);
1873 switch(type->type) {
1874 case SEQUENCE:
1875 case UNION:
1876 case ARRAY:
1877 case STRUCT:
1878 case STRING:
1879 fprintf(fd, "*from = (const char*)lttng_param_%s;\n", field->name);
1880 break;
1881 default:
1882 fprintf(fd, "*from = (const char*)&lttng_param_%s;\n", field->name);
1883 break;
1884 }
1885
1886
1887 if(print_type_write(type,
1888 fd, 2, basename, field->name, "lttng_param_", 0)) return 1;
1889 fprintf(fd, "\n");
1890
1891 /* Don't forget to flush pending memcpy */
1892 print_tabs(2, fd);
1893 fprintf(fd, "/* Flush pending memcpy */\n");
1894 print_tabs(2, fd);
1895 fprintf(fd, "if (*len != 0) {\n");
1896 print_tabs(3, fd);
1897 fprintf(fd, "memcpy(buffer+*to_base+*to, *from, *len);\n");
1898 print_tabs(3, fd);
1899 fprintf(fd, "*to += *len;\n");
1900 //print_tabs(3, fd);
1901 //fprintf(fd, "from += len;\n");
1902 print_tabs(3, fd);
1903 fprintf(fd, "*len = 0;\n");
1904 print_tabs(2, fd);
1905 fprintf(fd, "}\n");
1906 fprintf(fd, "\n");
1907 }
1908
1909 do_syscall:
1910 print_tabs(2, fd);
1911 fprintf(fd, "ret = ltt_trace_generic(ltt_facility_%s_%X, event_%s_%s, buffer, reserve_size, LTT_BLOCKING, %u);\n", fac->name, fac->checksum, fac->name, event->name, event->high_priority);
1912
1913 print_tabs(1, fd);
1914 fprintf(fd, "}\n\n");
1915
1916 print_tabs(1, fd);
1917 fprintf(fd, "return ret;\n\n");
1918
1919 fprintf(fd, "}\n");
1920 fprintf(fd,
1921 "#endif //LTT_TRACE\n");
1922 fprintf(fd, "#endif //!LTT_TRACE_FAST\n\n");
1923
1924 return 0;
1925 }
1926
1927 /* print_event_logging_function_user_fast
1928 * Print the logging function of an event for userspace tracing. This is the
1929 * core of genevent */
1930 int print_event_logging_function_user_fast(char *basename, facility_t *fac,
1931 event_t *event, FILE *fd)
1932 {
1933 char *attrib;
1934
1935 fprintf(fd, "#ifdef LTT_TRACE_FAST\n");
1936
1937 if(event->no_instrument_function) {
1938 attrib = "__attribute__((no_instrument_function)) ";
1939 } else {
1940 attrib = "";
1941 }
1942 fprintf(fd, "static inline %sint trace_%s(\n",attrib, basename);
1943
1944 int has_argument = 0;
1945 int has_type_fixed = 0;
1946
1947 for(unsigned int j = 0; j < event->fields.position; j++) {
1948 /* For each field, print the function argument */
1949 field_t *f = (field_t*)event->fields.array[j];
1950 type_descriptor_t *t = f->type;
1951 if(has_argument) {
1952 fprintf(fd, ",");
1953 fprintf(fd, "\n");
1954 }
1955 if(print_arg(t, fd, 2, basename, f->name)) return 1;
1956 has_argument = 1;
1957 }
1958 if(!has_argument) {
1959 print_tabs(2, fd);
1960 fprintf(fd, "void");
1961 }
1962 fprintf(fd,")\n");
1963 fprintf(fd,
1964 "#ifndef LTT_TRACE\n");
1965 fprintf(fd, "{\n");
1966 fprintf(fd, "}\n");
1967 fprintf(fd,"#else\n");
1968 fprintf(fd, "{\n");
1969 /* Print the function variables */
1970 print_tabs(1, fd);
1971 fprintf(fd, "unsigned int index;\n");
1972 print_tabs(1, fd);
1973 fprintf(fd, "struct ltt_trace_info *trace = thread_trace_info;\n");
1974 print_tabs(1, fd);
1975 fprintf(fd, "struct ltt_buf *ltt_buf;\n");
1976 print_tabs(1, fd);
1977 fprintf(fd, "char *buffer = NULL;\n");
1978 print_tabs(1, fd);
1979 fprintf(fd, "size_t real_to_base = 0; /* The buffer is allocated on arch_size alignment */\n");
1980 print_tabs(1, fd);
1981 fprintf(fd, "size_t *to_base = &real_to_base;\n");
1982 print_tabs(1, fd);
1983 fprintf(fd, "size_t real_to = 0;\n");
1984 print_tabs(1, fd);
1985 fprintf(fd, "size_t *to = &real_to;\n");
1986 print_tabs(1, fd);
1987 fprintf(fd, "size_t real_len = 0;\n");
1988 print_tabs(1, fd);
1989 fprintf(fd, "size_t *len = &real_len;\n");
1990 print_tabs(1, fd);
1991 fprintf(fd, "size_t reserve_size;\n");
1992 print_tabs(1, fd);
1993 fprintf(fd, "size_t slot_size;\n");
1994 print_tabs(1, fd);
1995
1996 if(event->fields.position > 0) {
1997 for(unsigned int i=0;i<event->fields.position;i++){
1998 /* Search for at least one child with fixed size. It means
1999 * we need local variables.*/
2000 field_t *field = (field_t*)(event->fields.array[i]);
2001 type_descriptor_t *type = field->type;
2002 has_type_fixed = has_type_local(type);
2003 if(has_type_fixed) break;
2004 }
2005
2006 if(has_type_fixed) {
2007 fprintf(fd, "size_t align;\n");
2008 print_tabs(1, fd);
2009 }
2010
2011 fprintf(fd, "const char *real_from;\n");
2012 print_tabs(1, fd);
2013 fprintf(fd, "const char **from = &real_from;\n");
2014 print_tabs(1, fd);
2015 }
2016 fprintf(fd, "uint64_t tsc;\n");
2017 print_tabs(1, fd);
2018 fprintf(fd, "size_t before_hdr_pad, after_hdr_pad, header_size;\n");
2019 fprintf(fd, "\n");
2020
2021 print_tabs(1, fd);
2022 fprintf(fd, "if (!trace) {\n");
2023 print_tabs(2, fd);
2024 fprintf(fd, "ltt_thread_init();\n");
2025 print_tabs(2, fd);
2026 fprintf(fd, "trace = thread_trace_info;\n");
2027 print_tabs(1, fd);
2028 fprintf(fd, "}\n\n");
2029 fprintf(fd, "\n");
2030
2031 /* Calculate event variable len + event data alignment offset.
2032 * Assume that the padding for alignment starts at a void*
2033 * address.
2034 * This excludes the header size and alignment. */
2035
2036 print_tabs(1, fd);
2037 fprintf(fd, "/* For each field, calculate the field size. */\n");
2038 print_tabs(1, fd);
2039 fprintf(fd, "/* size = *to_base + *to + *len */\n");
2040 print_tabs(1, fd);
2041 fprintf(fd, "/* Assume that the padding for alignment starts at a\n");
2042 print_tabs(1, fd);
2043 fprintf(fd, " * sizeof(void *) address. */\n");
2044 fprintf(fd, "\n");
2045
2046 for(unsigned int i=0;i<event->fields.position;i++){
2047 field_t *field = (field_t*)(event->fields.array[i]);
2048 type_descriptor_t *type = field->type;
2049 /* Set from */
2050 print_tabs(1, fd);
2051 switch(type->type) {
2052 case SEQUENCE:
2053 case UNION:
2054 case ARRAY:
2055 case STRUCT:
2056 case STRING:
2057 fprintf(fd, "*from = (const char*)lttng_param_%s;\n", field->name);
2058 break;
2059 default:
2060 fprintf(fd, "*from = (const char*)&lttng_param_%s;\n", field->name);
2061 break;
2062 }
2063
2064 if(print_type_write(type,
2065 fd, 1, basename, field->name, "lttng_param_", 0)) return 1;
2066 fprintf(fd, "\n");
2067 }
2068 print_tabs(1, fd);
2069 fprintf(fd, "reserve_size = *to_base + *to + *len;\n");
2070
2071 print_tabs(1, fd);
2072 fprintf(fd, "trace->nesting++;\n");
2073
2074 /* Get facility index */
2075
2076 print_tabs(1, fd);
2077 fprintf(fd,
2078 "index = ltt_get_index_from_facility(ltt_facility_%s_%X,\n"\
2079 "\t\t\t\t\t\tevent_%s_%s);\n",
2080 fac->name, fac->checksum, fac->name, event->name);
2081 fprintf(fd,"\n");
2082
2083
2084 print_tabs(1, fd);
2085 fprintf(fd, "{\n");
2086
2087 if(event->per_trace) {
2088 print_tabs(2, fd);
2089 fprintf(fd, "if (dest_trace != trace) continue;\n\n");
2090 }
2091
2092 print_tabs(2, fd);
2093 fprintf(fd, "ltt_buf = ltt_get_channel_from_index(trace, index);\n");
2094 print_tabs(2, fd);
2095
2096
2097 /* Relay reserve */
2098 /* If error, increment event lost counter (done by ltt_reserve_slot) and
2099 * return */
2100 print_tabs(2, fd);
2101 fprintf(fd, "slot_size = 0;\n");
2102 print_tabs(2, fd);
2103 fprintf(fd, "buffer = ltt_reserve_slot(trace, ltt_buf,\n");
2104 print_tabs(3, fd);
2105 fprintf(fd, "reserve_size, &slot_size, &tsc,\n");
2106 print_tabs(3, fd);
2107 fprintf(fd, "&before_hdr_pad, &after_hdr_pad, &header_size);\n");
2108 /* If error, return */
2109 print_tabs(2, fd);
2110 fprintf(fd, "if (!buffer)\n");
2111 print_tabs(3, fd);
2112 fprintf(fd, "goto end; /* buffer full */\n\n");
2113 //print_tabs(2, fd);
2114 // for DEBUG only
2115 // fprintf(fd, "goto commit; /* DEBUG : never actually write. */\n\n");
2116 print_tabs(2, fd);
2117 fprintf(fd, "*to_base = *to = *len = 0;\n");
2118 fprintf(fd, "\n");
2119
2120 /* Write event header */
2121 print_tabs(2, fd);
2122 fprintf(fd, "ltt_write_event_header(trace, ltt_buf, buffer,\n");
2123 print_tabs(3, fd);
2124 fprintf(fd, "ltt_facility_%s_%X, event_%s_%s,\n", fac->name, fac->checksum,
2125 fac->name, event->name);
2126 print_tabs(3, fd);
2127 fprintf(fd, "reserve_size, before_hdr_pad, tsc);\n");
2128 print_tabs(2, fd);
2129 fprintf(fd, "*to_base += before_hdr_pad + after_hdr_pad + header_size;\n");
2130 fprintf(fd, "\n");
2131
2132 /* write data. */
2133
2134 for(unsigned int i=0;i<event->fields.position;i++){
2135 field_t *field = (field_t*)(event->fields.array[i]);
2136 type_descriptor_t *type = field->type;
2137
2138 /* Set from */
2139 print_tabs(2, fd);
2140 switch(type->type) {
2141 case SEQUENCE:
2142 case UNION:
2143 case ARRAY:
2144 case STRUCT:
2145 case STRING:
2146 fprintf(fd, "*from = (const char*)lttng_param_%s;\n", field->name);
2147 break;
2148 default:
2149 fprintf(fd, "*from = (const char*)&lttng_param_%s;\n", field->name);
2150 break;
2151 }
2152
2153
2154 if(print_type_write(type,
2155 fd, 2, basename, field->name, "lttng_param_", 0)) return 1;
2156 fprintf(fd, "\n");
2157
2158 /* Don't forget to flush pending memcpy */
2159 print_tabs(2, fd);
2160 fprintf(fd, "/* Flush pending memcpy */\n");
2161 print_tabs(2, fd);
2162 fprintf(fd, "if (*len != 0) {\n");
2163 print_tabs(3, fd);
2164 fprintf(fd, "memcpy(buffer+*to_base+*to, *from, *len);\n");
2165 print_tabs(3, fd);
2166 fprintf(fd, "*to += *len;\n");
2167 //print_tabs(3, fd);
2168 //fprintf(fd, "from += len;\n");
2169 print_tabs(3, fd);
2170 fprintf(fd, "*len = 0;\n");
2171 print_tabs(2, fd);
2172 fprintf(fd, "}\n");
2173 fprintf(fd, "\n");
2174 }
2175
2176
2177 /* commit */
2178 // for DEBUG only.
2179 //fprintf(fd, "commit:\n"); /* DEBUG! */
2180 print_tabs(2, fd);
2181 fprintf(fd, "ltt_commit_slot(ltt_buf, buffer, slot_size);\n\n");
2182
2183 fprintf(fd, "}\n\n");
2184
2185 fprintf(fd, "end:\n");
2186 /* Release locks */
2187 print_tabs(1, fd);
2188 fprintf(fd, "trace->nesting--;\n");
2189
2190
2191 fprintf(fd, "}\n");
2192 fprintf(fd,
2193 "#endif //LTT_TRACE\n");
2194 fprintf(fd, "#endif //LTT_TRACE_FAST\n");
2195
2196 return 0;
2197 }
2198
2199
2200
2201
2202
2203
2204 /* ltt-facility-name.h : main logging header.
2205 * log_header */
2206
2207 void print_log_header_head(facility_t *fac, FILE *fd)
2208 {
2209 fprintf(fd, "#ifndef _LTT_FACILITY_%s_H_\n", fac->capname);
2210 fprintf(fd, "#define _LTT_FACILITY_%s_H_\n\n", fac->capname);
2211 fprintf(fd, "#include <linux/types.h>\n");
2212 if(!fac->arch)
2213 fprintf(fd, "#include <ltt/ltt-facility-id-%s.h>\n", fac->name);
2214 else
2215 fprintf(fd, "#include <ltt/ltt-facility-id-%s_%s.h>\n",
2216 fac->name,
2217 fac->arch);
2218 fprintf(fd, "#include <ltt/ltt-tracer.h>\n");
2219 fprintf(fd, "\n");
2220 }
2221
2222 /* ltt-facility-name.h : main logging header.
2223 * log_header */
2224
2225 void print_log_header_head_user(facility_t *fac, FILE *fd)
2226 {
2227 fprintf(fd, "#ifndef _LTT_FACILITY_%s_H_\n", fac->capname);
2228 fprintf(fd, "#define _LTT_FACILITY_%s_H_\n\n", fac->capname);
2229 fprintf(fd, "#include <sys/types.h>\n");
2230 if(!fac->arch)
2231 fprintf(fd, "#include <ltt/ltt-facility-id-%s.h>\n", fac->name);
2232 else
2233 fprintf(fd, "#include <asm/ltt/ltt-facility-id-%s_%s.h>\n",
2234 fac->name,
2235 fac->arch);
2236 fprintf(fd, "#include <ltt/ltt-usertrace.h>\n");
2237 fprintf(fd, "\n");
2238 fprintf(fd, "#ifdef __cplusplus\n");
2239 fprintf(fd, "extern \"C\" {\n");
2240 fprintf(fd, "#endif\n");
2241 fprintf(fd, "\n");
2242 }
2243
2244
2245 int print_log_header_types(facility_t *fac, FILE *fd)
2246 {
2247 sequence_t *types = &fac->named_types.values;
2248 fprintf(fd, "/* Named types */\n");
2249 fprintf(fd, "\n");
2250
2251 for(unsigned int i = 0; i < types->position; i++) {
2252 /* For each named type, print the definition */
2253 if(print_type_declaration(types->array[i], fd,
2254 0, "", "")) return 1;
2255 /* Print also the align function */
2256 if(((type_descriptor_t*)types->array[i])->fac->align)
2257 if(print_type_alignment_fct(types->array[i], fd,
2258 0, "", "")) return 1;
2259 /* Print also the write function */
2260 if(print_type_write_fct(types->array[i], fd,
2261 0, "", "")) return 1;
2262 }
2263 return 0;
2264 }
2265
2266 int print_log_header_events(facility_t *fac, FILE *fd)
2267 {
2268 sequence_t *events = &fac->events;
2269 char basename[PATH_MAX];
2270 unsigned int facname_len;
2271
2272 strncpy(basename, fac->name, PATH_MAX);
2273 facname_len = strlen(basename);
2274 strncat(basename, "_", PATH_MAX-facname_len);
2275 facname_len = strlen(basename);
2276
2277 for(unsigned int i = 0; i < events->position; i++) {
2278 event_t *event = (event_t*)events->array[i];
2279 strncpy(&basename[facname_len], event->name, PATH_MAX-facname_len);
2280
2281 /* For each event, print structure, and then logging function */
2282 fprintf(fd, "/* Event %s structures */\n",
2283 event->name);
2284 for(unsigned int j = 0; j < event->fields.position; j++) {
2285 /* For each unnamed type, print the definition */
2286 field_t *f = (field_t*)event->fields.array[j];
2287 type_descriptor_t *t = f->type;
2288 if(t->type_name == NULL) {
2289 if((print_type_declaration(t, fd, 0, basename, f->name))) return 1;
2290 /* Print also the align function */
2291 if(fac->align) {
2292 if((print_type_alignment_fct(t, fd, 0, basename, f->name))) return 1;
2293 }
2294 /* Print also the write function */
2295 if((print_type_write_fct(t, fd, 0, basename, f->name))) return 1;
2296 }
2297 }
2298
2299 fprintf(fd, "\n");
2300
2301 fprintf(fd, "/* Event %s logging function */\n",
2302 event->name);
2303
2304 if(!fac->user) {
2305 if(print_event_logging_function(basename, fac, event, fd)) return 1;
2306 } else {
2307 if(print_event_logging_function_user_generic(basename, fac, event, fd))
2308 return 1;
2309 if(print_event_logging_function_user_fast(basename, fac, event, fd))
2310 return 1;
2311 }
2312
2313 fprintf(fd, "\n");
2314 }
2315
2316 return 0;
2317 }
2318
2319
2320 void print_log_header_tail(facility_t *fac, FILE *fd)
2321 {
2322 fprintf(fd, "#endif //_LTT_FACILITY_%s_H_\n",fac->capname);
2323 }
2324
2325 void print_log_header_tail_user(facility_t *fac, FILE *fd)
2326 {
2327 fprintf(fd, "#ifdef __cplusplus\n");
2328 fprintf(fd, "} /* end of extern \"C\" */\n");
2329 fprintf(fd, "#endif\n");
2330 fprintf(fd, "\n");
2331 fprintf(fd, "#endif //_LTT_FACILITY_%s_H_\n",fac->capname);
2332 }
2333
2334 int print_log_header(facility_t *fac)
2335 {
2336 char filename[PATH_MAX];
2337 unsigned int filename_size = 0;
2338 FILE *fd;
2339 dprintf("%s\n", fac->name);
2340
2341 strcpy(filename, "ltt-facility-");
2342 filename_size = strlen(filename);
2343
2344 strncat(filename, fac->name, PATH_MAX - filename_size);
2345 filename_size = strlen(filename);
2346
2347 if(fac->arch) {
2348 strncat(filename, "_", PATH_MAX - filename_size);
2349 filename_size = strlen(filename);
2350
2351 strncat(filename, fac->arch, PATH_MAX - filename_size);
2352 filename_size = strlen(filename);
2353 }
2354
2355 strncat(filename, ".h", PATH_MAX - filename_size);
2356 filename_size = strlen(filename);
2357
2358
2359 fd = fopen(filename, "w");
2360 if(fd == NULL) {
2361 printf("Error opening file %s for writing : %s\n",
2362 filename, strerror(errno));
2363 return errno;
2364 }
2365
2366 /* Print file head */
2367 if(!fac->user)
2368 print_log_header_head(fac, fd);
2369 else
2370 print_log_header_head_user(fac, fd);
2371
2372 /* print named types in declaration order */
2373 if(print_log_header_types(fac, fd)) return 1;
2374
2375 /* Print events */
2376 if(print_log_header_events(fac, fd)) return 1;
2377
2378 /* Print file tail */
2379 if(!fac->user)
2380 print_log_header_tail(fac, fd);
2381 else
2382 print_log_header_tail_user(fac, fd);
2383
2384
2385
2386 fclose(fd);
2387
2388 return 0;
2389 }
2390
2391
2392 /* ltt-facility-id-name.h : facility id.
2393 * log_id_header */
2394 int print_id_header(facility_t *fac)
2395 {
2396 char filename[PATH_MAX];
2397 unsigned int filename_size = 0;
2398 FILE *fd;
2399 char basename[PATH_MAX];
2400 char basename_len = 0;
2401
2402 dprintf("%s\n", fac->name);
2403
2404 strcpy(filename, "ltt-facility-id-");
2405 filename_size = strlen(filename);
2406
2407 strncat(filename, fac->name, PATH_MAX - filename_size);
2408 filename_size = strlen(filename);
2409
2410 if(fac->arch) {
2411 strncat(filename, "_", PATH_MAX - filename_size);
2412 filename_size = strlen(filename);
2413
2414 strncat(filename, fac->arch, PATH_MAX - filename_size);
2415 filename_size = strlen(filename);
2416 }
2417
2418 strncat(filename, ".h", PATH_MAX - filename_size);
2419 filename_size = strlen(filename);
2420
2421
2422 fd = fopen(filename, "w");
2423 if(fd == NULL) {
2424 printf("Error opening file %s for writing : %s\n",
2425 filename, strerror(errno));
2426 return errno;
2427 }
2428
2429 if(!fac->user) {
2430 fprintf(fd, "#ifndef _LTT_FACILITY_ID_%s_H_\n",fac->capname);
2431 fprintf(fd, "#define _LTT_FACILITY_ID_%s_H_\n\n",fac->capname);
2432 fprintf(fd, "#ifdef CONFIG_LTT\n");
2433
2434 fprintf(fd,"#include <linux/ltt-facilities.h>\n\n");
2435
2436 fprintf(fd,"/**** facility handle ****/\n\n");
2437 fprintf(fd,"extern ltt_facility_t ltt_facility_%s_%X;\n",
2438 fac->name, fac->checksum);
2439 fprintf(fd,"extern ltt_facility_t ltt_facility_%s;\n\n\n",fac->name);
2440
2441 strncpy(basename, fac->name, PATH_MAX);
2442 basename_len = strlen(basename);
2443 strncat(basename, "_", PATH_MAX - basename_len);
2444 basename_len++;
2445
2446 fprintf(fd,"/**** event index ****/\n\n");
2447 fprintf(fd,"enum %s_event {\n",fac->name);
2448
2449 for(unsigned int i = 0; i < fac->events.position; i++) {
2450 event_t *event = (event_t*)fac->events.array[i];
2451 strncpy(basename+basename_len, event->name, PATH_MAX-basename_len);
2452 print_tabs(1, fd);
2453 fprintf(fd, "event_%s,\n", basename);
2454 }
2455 print_tabs(1, fd);
2456 fprintf(fd, "facility_%s_num_events\n", fac->name);
2457 fprintf(fd, "};\n");
2458 fprintf(fd, "\n");
2459
2460
2461 fprintf(fd, "#endif //CONFIG_LTT\n");
2462 fprintf(fd, "#endif //_LTT_FACILITY_ID_%s_H_\n",fac->capname);
2463 } else {
2464 fprintf(fd, "#ifndef _LTT_FACILITY_ID_%s_H_\n",fac->capname);
2465 fprintf(fd, "#define _LTT_FACILITY_ID_%s_H_\n\n",fac->capname);
2466 fprintf(fd, "#ifdef LTT_TRACE\n");
2467
2468 fprintf(fd,"#include <ltt/ltt-usertrace.h>\n\n");
2469
2470 fprintf(fd,"/**** facility handle ****/\n\n");
2471 fprintf(fd,"extern ltt_facility_t ltt_facility_%s_%X;\n",
2472 fac->name, fac->checksum);
2473 fprintf(fd,"extern ltt_facility_t ltt_facility_%s;\n\n\n",fac->name);
2474
2475 strncpy(basename, fac->name, PATH_MAX);
2476 basename_len = strlen(basename);
2477 strncat(basename, "_", PATH_MAX - basename_len);
2478 basename_len++;
2479
2480 fprintf(fd,"/**** event index ****/\n\n");
2481 fprintf(fd,"enum %s_event {\n",fac->name);
2482
2483 for(unsigned int i = 0; i < fac->events.position; i++) {
2484 event_t *event = (event_t*)fac->events.array[i];
2485 strncpy(basename+basename_len, event->name, PATH_MAX-basename_len);
2486 print_tabs(1, fd);
2487 fprintf(fd, "event_%s,\n", basename);
2488 }
2489 print_tabs(1, fd);
2490 fprintf(fd, "facility_%s_num_events\n", fac->name);
2491 fprintf(fd, "};\n");
2492 fprintf(fd, "\n");
2493
2494
2495 fprintf(fd, "#endif //LTT_TRACE\n");
2496 fprintf(fd, "#endif //_LTT_FACILITY_ID_%s_H_\n",fac->capname);
2497 }
2498
2499
2500 fclose(fd);
2501
2502 return 0;
2503 }
2504
2505
2506 /* ltt-facility-loader-name.h : facility specific loader info.
2507 * loader_header */
2508 int print_loader_header(facility_t *fac)
2509 {
2510 char filename[PATH_MAX];
2511 unsigned int filename_size = 0;
2512 FILE *fd;
2513 dprintf("%s\n", fac->name);
2514
2515 strcpy(filename, "ltt-facility-loader-");
2516 filename_size = strlen(filename);
2517
2518 strncat(filename, fac->name, PATH_MAX - filename_size);
2519 filename_size = strlen(filename);
2520
2521 if(fac->arch) {
2522 strncat(filename, "_", PATH_MAX - filename_size);
2523 filename_size = strlen(filename);
2524
2525 strncat(filename, fac->arch, PATH_MAX - filename_size);
2526 filename_size = strlen(filename);
2527 }
2528
2529 strncat(filename, ".h", PATH_MAX - filename_size);
2530 filename_size = strlen(filename);
2531
2532
2533 fd = fopen(filename, "w");
2534 if(fd == NULL) {
2535 printf("Error opening file %s for writing : %s\n",
2536 filename, strerror(errno));
2537 return errno;
2538 }
2539
2540 fprintf(fd, "#ifndef _LTT_FACILITY_LOADER_%s_H_\n", fac->capname);
2541 fprintf(fd, "#define _LTT_FACILITY_LOADER_%s_H_\n\n", fac->capname);
2542 fprintf(fd, "#ifdef CONFIG_LTT\n\n");
2543 fprintf(fd,"#include <linux/ltt-facilities.h>\n");
2544 if(!fac->arch)
2545 fprintf(fd,"#include <ltt/ltt-facility-id-%s.h>\n\n",
2546 fac->name);
2547 else
2548 fprintf(fd,"#include <ltt/ltt-facility-id-%s_%s.h>\n\n",
2549 fac->name,
2550 fac->arch);
2551 fprintf(fd,"ltt_facility_t\tltt_facility_%s;\n", fac->name);
2552 fprintf(fd,"ltt_facility_t\tltt_facility_%s_%X;\n\n",
2553 fac->name, fac->checksum);
2554
2555 fprintf(fd,"#define LTT_FACILITY_SYMBOL\t\tltt_facility_%s\n",
2556 fac->name);
2557 fprintf(fd,"#define LTT_FACILITY_CHECKSUM_SYMBOL\tltt_facility_%s_%X\n",
2558 fac->name, fac->checksum);
2559 fprintf(fd,"#define LTT_FACILITY_CHECKSUM\t\t0x%X\n", fac->checksum);
2560 fprintf(fd,"#define LTT_FACILITY_NAME\t\t\"%s\"\n", fac->name);
2561 fprintf(fd,"#define LTT_FACILITY_NUM_EVENTS\tfacility_%s_num_events\n\n",
2562 fac->name);
2563 fprintf(fd,"#define LTT_FACILITY_ALIGNMENT\t\t%u\n\n",
2564 fac->align);
2565 fprintf(fd, "#endif //CONFIG_LTT\n\n");
2566 fprintf(fd, "#endif //_LTT_FACILITY_LOADER_%s_H_\n", fac->capname);
2567
2568 fclose(fd);
2569
2570 return 0;
2571 }
2572
2573 int print_loader_header_user(facility_t *fac)
2574 {
2575 char filename[PATH_MAX];
2576 unsigned int filename_size = 0;
2577 FILE *fd;
2578 dprintf("%s\n", fac->name);
2579
2580 strcpy(filename, "ltt-facility-loader-");
2581 filename_size = strlen(filename);
2582
2583 strncat(filename, fac->name, PATH_MAX - filename_size);
2584 filename_size = strlen(filename);
2585
2586 if(fac->arch) {
2587 strncat(filename, "_", PATH_MAX - filename_size);
2588 filename_size = strlen(filename);
2589
2590 strncat(filename, fac->arch, PATH_MAX - filename_size);
2591 filename_size = strlen(filename);
2592 }
2593
2594 strncat(filename, ".h", PATH_MAX - filename_size);
2595 filename_size = strlen(filename);
2596
2597
2598 fd = fopen(filename, "w");
2599 if(fd == NULL) {
2600 printf("Error opening file %s for writing : %s\n",
2601 filename, strerror(errno));
2602 return errno;
2603 }
2604
2605 fprintf(fd, "#ifndef _LTT_FACILITY_LOADER_%s_H_\n", fac->capname);
2606 fprintf(fd, "#define _LTT_FACILITY_LOADER_%s_H_\n\n", fac->capname);
2607 fprintf(fd,"#include <ltt/ltt-usertrace.h>\n");
2608 if(!fac->arch)
2609 fprintf(fd,"#include <ltt/ltt-facility-id-%s.h>\n\n",
2610 fac->name);
2611 else
2612 fprintf(fd,"#include <ltt/ltt-facility-id-%s_%s.h>\n\n",
2613 fac->name,
2614 fac->arch);
2615 fprintf(fd,"ltt_facility_t\tltt_facility_%s;\n", fac->name);
2616 fprintf(fd,"ltt_facility_t\tltt_facility_%s_%X;\n\n",
2617 fac->name, fac->checksum);
2618
2619 fprintf(fd,"#define LTT_FACILITY_SYMBOL\t\t\t\t\t\t\tltt_facility_%s\n",
2620 fac->name);
2621 fprintf(fd,"#define LTT_FACILITY_CHECKSUM_SYMBOL\t\tltt_facility_%s_%X\n",
2622 fac->name, fac->checksum);
2623 fprintf(fd,"#define LTT_FACILITY_CHECKSUM\t\t\t\t\t\t0x%X\n", fac->checksum);
2624 fprintf(fd,"#define LTT_FACILITY_NAME\t\t\t\t\t\t\t\t\"%s\"\n", fac->name);
2625 fprintf(fd,"#define LTT_FACILITY_NUM_EVENTS\t\t\t\t\tfacility_%s_num_events\n\n",
2626 fac->name);
2627 fprintf(fd,"#define LTT_FACILITY_ALIGNMENT\t\t\t\t\t%u\n\n",
2628 fac->align);
2629 fprintf(fd, "#endif //_LTT_FACILITY_LOADER_%s_H_\n", fac->capname);
2630
2631 fclose(fd);
2632
2633 return 0;
2634 }
2635
2636
2637
2638 /* ltt-facility-loader-name.c : generic facility loader
2639 * loader_c */
2640 int print_loader_c(facility_t *fac)
2641 {
2642 char filename[PATH_MAX];
2643 unsigned int filename_size = 0;
2644 FILE *fd;
2645 dprintf("%s\n", fac->name);
2646
2647 strcpy(filename, "ltt-facility-loader-");
2648 filename_size = strlen(filename);
2649
2650 strncat(filename, fac->name, PATH_MAX - filename_size);
2651 filename_size = strlen(filename);
2652
2653 if(fac->arch) {
2654 strncat(filename, "_", PATH_MAX - filename_size);
2655 filename_size = strlen(filename);
2656
2657 strncat(filename, fac->arch, PATH_MAX - filename_size);
2658 filename_size = strlen(filename);
2659 }
2660
2661 strncat(filename, ".c", PATH_MAX - filename_size);
2662 filename_size = strlen(filename);
2663
2664
2665 fd = fopen(filename, "w");
2666 if(fd == NULL) {
2667 printf("Error opening file %s for writing : %s\n",
2668 filename, strerror(errno));
2669 return errno;
2670 }
2671
2672 fprintf(fd, "/*\n");
2673 if(!fac->arch)
2674 fprintf(fd, " * ltt-facility-loader-%s.c\n", fac->name);
2675 else
2676 fprintf(fd, " * ltt-facility-loader-%s_%s.c\n", fac->name, fac->arch);
2677 fprintf(fd, " *\n");
2678 fprintf(fd, " * (C) Copyright 2005 - \n");
2679 fprintf(fd, " * Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)\n");
2680 fprintf(fd, " *\n");
2681 fprintf(fd, " * Contains the LTT facility loader.\n");
2682 fprintf(fd, " *\n");
2683 fprintf(fd, " */\n");
2684 fprintf(fd, "\n");
2685 fprintf(fd, "\n");
2686 fprintf(fd, "#include <linux/ltt-facilities.h>\n");
2687 fprintf(fd, "#include <linux/module.h>\n");
2688 fprintf(fd, "#include <linux/init.h>\n");
2689 if(!fac->arch)
2690 fprintf(fd, "#include \"ltt-facility-loader-%s.h\"\n", fac->name);
2691 else
2692 fprintf(fd, "#include \"ltt-facility-loader-%s_%s.h\"\n",
2693 fac->name, fac->arch);
2694 fprintf(fd, "\n");
2695 fprintf(fd, "\n");
2696 fprintf(fd, "#ifdef CONFIG_LTT\n");
2697 fprintf(fd, "\n");
2698 fprintf(fd, "EXPORT_SYMBOL(LTT_FACILITY_SYMBOL);\n");
2699 fprintf(fd, "EXPORT_SYMBOL(LTT_FACILITY_CHECKSUM_SYMBOL);\n");
2700 fprintf(fd, "\n");
2701 fprintf(fd, "static const char ltt_facility_name[] = LTT_FACILITY_NAME;\n");
2702 fprintf(fd, "\n");
2703 fprintf(fd, "#define SYMBOL_STRING(sym) #sym\n");
2704 fprintf(fd, "\n");
2705 fprintf(fd, "static struct ltt_facility facility = {\n");
2706 fprintf(fd, "\t.name = ltt_facility_name,\n");
2707 fprintf(fd, "\t.num_events = LTT_FACILITY_NUM_EVENTS,\n");
2708 fprintf(fd, "\t.checksum = LTT_FACILITY_CHECKSUM,\n");
2709 fprintf(fd, "\t.symbol = SYMBOL_STRING(LTT_FACILITY_SYMBOL),\n");
2710 fprintf(fd, "\t.alignment = LTT_FACILITY_ALIGNMENT,\n");
2711 fprintf(fd, "};\n");
2712 fprintf(fd, "\n");
2713 fprintf(fd, "static int __init facility_init(void)\n");
2714 fprintf(fd, "{\n");
2715 fprintf(fd, "\tprintk(KERN_INFO \"LTT : ltt-facility-%s init in kernel\\n\");\n", fac->name);
2716 fprintf(fd, "\n");
2717 fprintf(fd, "\tLTT_FACILITY_SYMBOL = ltt_facility_kernel_register(&facility);\n");
2718 fprintf(fd, "\tLTT_FACILITY_CHECKSUM_SYMBOL = LTT_FACILITY_SYMBOL;\n");
2719 fprintf(fd, "\t\n");
2720 fprintf(fd, "\treturn LTT_FACILITY_SYMBOL;\n");
2721 fprintf(fd, "}\n");
2722 fprintf(fd, "\n");
2723 fprintf(fd, "#ifndef MODULE\n");
2724 fprintf(fd, "__initcall(facility_init);\n");
2725 fprintf(fd, "#else\n");
2726 fprintf(fd, "module_init(facility_init);\n");
2727 fprintf(fd, "static void __exit facility_exit(void)\n");
2728 fprintf(fd, "{\n");
2729 fprintf(fd, "\tint err;\n");
2730 fprintf(fd, "\n");
2731 fprintf(fd, "\terr = ltt_facility_unregister(LTT_FACILITY_SYMBOL);\n");
2732 fprintf(fd, "\tif (err != 0)\n");
2733 fprintf(fd, "\t\tprintk(KERN_ERR \"LTT : Error in unregistering facility.\\n\");\n");
2734 fprintf(fd, "\n");
2735 fprintf(fd, "}\n");
2736 fprintf(fd, "module_exit(facility_exit)\n");
2737 fprintf(fd, "\n");
2738 fprintf(fd, "MODULE_LICENSE(\"GPL\");\n");
2739 fprintf(fd, "MODULE_AUTHOR(\"Mathieu Desnoyers\");\n");
2740 fprintf(fd, "MODULE_DESCRIPTION(\"Linux Trace Toolkit Facility\");\n");
2741 fprintf(fd, "\n");
2742 fprintf(fd, "#endif //MODULE\n");
2743 fprintf(fd, "\n");
2744 fprintf(fd, "#endif //CONFIG_LTT\n");
2745
2746 fclose(fd);
2747
2748 return 0;
2749 }
2750
2751 int print_loader_c_user(facility_t *fac)
2752 {
2753 char filename[PATH_MAX];
2754 unsigned int filename_size = 0;
2755 FILE *fd;
2756 dprintf("%s\n", fac->name);
2757
2758 strcpy(filename, "ltt-facility-loader-");
2759 filename_size = strlen(filename);
2760
2761 strncat(filename, fac->name, PATH_MAX - filename_size);
2762 filename_size = strlen(filename);
2763
2764 if(fac->arch) {
2765 strncat(filename, "_", PATH_MAX - filename_size);
2766 filename_size = strlen(filename);
2767
2768 strncat(filename, fac->arch, PATH_MAX - filename_size);
2769 filename_size = strlen(filename);
2770 }
2771
2772 strncat(filename, ".c", PATH_MAX - filename_size);
2773 filename_size = strlen(filename);
2774
2775
2776 fd = fopen(filename, "w");
2777 if(fd == NULL) {
2778 printf("Error opening file %s for writing : %s\n",
2779 filename, strerror(errno));
2780 return errno;
2781 }
2782
2783 fprintf(fd, "/*\n");
2784 if(!fac->arch)
2785 fprintf(fd, " * ltt-facility-loader-%s.c\n", fac->name);
2786 else
2787 fprintf(fd, " * ltt-facility-loader-%s_%s.c\n", fac->name, fac->arch);
2788 fprintf(fd, " *\n");
2789 fprintf(fd, " * (C) Copyright 2005 - \n");
2790 fprintf(fd, " * Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)\n");
2791 fprintf(fd, " *\n");
2792 fprintf(fd, " * Contains the LTT user space facility loader.\n");
2793 fprintf(fd, " *\n");
2794 fprintf(fd, " */\n");
2795 fprintf(fd, "\n");
2796 fprintf(fd, "\n");
2797 fprintf(fd, "#define LTT_TRACE\n");
2798 fprintf(fd, "#include <error.h>\n");
2799 fprintf(fd, "#include <stdio.h>\n");
2800 fprintf(fd, "#include <ltt/ltt-usertrace.h>\n");
2801 if(!fac->arch)
2802 fprintf(fd, "#include \"ltt-facility-loader-%s.h\"\n", fac->name);
2803 else
2804 fprintf(fd, "#include \"ltt-facility-loader-%s_%s.h\"\n",
2805 fac->name, fac->arch);
2806 fprintf(fd, "\n");
2807 fprintf(fd, "static struct user_facility_info facility = {\n");
2808 fprintf(fd, "\t.name = LTT_FACILITY_NAME,\n");
2809 fprintf(fd, "\t.num_events = LTT_FACILITY_NUM_EVENTS,\n");
2810 fprintf(fd, "#ifndef LTT_PACK\n");
2811 fprintf(fd, "\t.alignment = LTT_FACILITY_ALIGNMENT?sizeof(void*):0,\n");
2812 fprintf(fd, "#else\n");
2813 fprintf(fd, "\t.alignment = 0,\n");
2814 fprintf(fd, "#endif //LTT_PACK\n");
2815 fprintf(fd, "\t.checksum = LTT_FACILITY_CHECKSUM,\n");
2816 fprintf(fd, "\t.int_size = sizeof(int),\n");
2817 fprintf(fd, "\t.long_size = sizeof(long),\n");
2818 fprintf(fd, "\t.pointer_size = sizeof(void*),\n");
2819 fprintf(fd, "\t.size_t_size = sizeof(size_t)\n");
2820 fprintf(fd, "};\n");
2821 fprintf(fd, "\n");
2822 fprintf(fd, "static void __attribute__((constructor)) __ltt_user_init(void)\n");
2823 fprintf(fd, "{\n");
2824 fprintf(fd, "\tint err;\n");
2825 fprintf(fd, "#ifdef LTT_SHOW_DEBUG\n");
2826 fprintf(fd, "\tprintf(\"LTT : ltt-facility-%s init in userspace\\n\");\n", fac->name);
2827 fprintf(fd, "#endif //LTT_SHOW_DEBUG\n");
2828 fprintf(fd, "\n");
2829 fprintf(fd, "\terr = ltt_register_generic(&LTT_FACILITY_SYMBOL, &facility);\n");
2830 fprintf(fd, "\tLTT_FACILITY_CHECKSUM_SYMBOL = LTT_FACILITY_SYMBOL;\n");
2831 fprintf(fd, "\t\n");
2832 fprintf(fd, "\tif (err) {\n");
2833 fprintf(fd, "#ifdef LTT_SHOW_DEBUG\n");
2834 fprintf(fd, "\t\tperror(\"Error in ltt_register_generic\");\n");
2835 fprintf(fd, "#endif //LTT_SHOW_DEBUG\n");
2836 fprintf(fd, "\t}\n");
2837 fprintf(fd, "}\n");
2838 fprintf(fd, "\n");
2839
2840 fclose(fd);
2841
2842 return 0;
2843 }
2844
2845
2846
2847 /* open facility */
2848 /* code taken from ltt_facility_open in ltt/facility.c in lttv */
2849
2850 /*****************************************************************************
2851 *Function name
2852 * ltt_facility_open : open facilities
2853 *Input params
2854 * pathname : the path name of the facility
2855 *
2856 * Open the facility corresponding to the right checksum.
2857 *
2858 *returns the facility on success, NULL on error.
2859 ****************************************************************************/
2860 facility_t *ltt_facility_open(char * pathname)
2861 {
2862 int ret = 0;
2863 char *token;
2864 parse_file_t in;
2865 facility_t * fac = NULL;
2866 char buffer[BUFFER_SIZE];
2867 int generated = FALSE;
2868
2869 in.buffer = &(buffer[0]);
2870 in.lineno = 0;
2871 in.error = error_callback;
2872 in.name = pathname;
2873 in.unget = 0;
2874
2875 in.fp = fopen(in.name, "r");
2876 if(in.fp == NULL) {
2877 ret = 1;
2878 goto open_error;
2879 }
2880
2881 while(1){
2882 token = getToken(&in);
2883 if(in.type == ENDFILE) break;
2884
2885 if(generated) {
2886 printf("More than one facility in the file. Only using the first one.\n");
2887 break;
2888 }
2889
2890 if(strcmp(token, "<")) in.error(&in,"not a facility file");
2891 token = getName(&in);
2892 if(strcmp(token, "?")) in.error(&in,"not a facility file");
2893 token = getName(&in);
2894 if(strcmp(token, "xml")) in.error(&in,"not a facility file");
2895 token = getName(&in);
2896 if(strcmp(token, "version")) in.error(&in,"not a facility file");
2897 token = getName(&in);
2898 if(strcmp(token, "=")) in.error(&in,"not a facility file");
2899 token = getQuotedString(&in);
2900 if(strcmp(token, "1.0")) in.error(&in,"not a facility file");
2901 token = getName(&in);
2902 if(strcmp(token, "?")) in.error(&in,"not a facility file");
2903 token = getToken(&in);
2904 if(strcmp(token, ">")) in.error(&in,"not a facility file");
2905
2906 token = getName(&in);
2907 if(strcmp(token, "<")) in.error(&in,"not a facility file");
2908 token = getName(&in);
2909 if(strcmp("facility",token) == 0) {
2910 fac = malloc(sizeof(facility_t));
2911 fac->name = NULL;
2912 fac->description = NULL;
2913 sequence_init(&(fac->events));
2914 table_init(&(fac->named_types));
2915 sequence_init(&(fac->unnamed_types));
2916
2917 parseFacility(&in, fac);
2918
2919 //check if any namedType is not defined
2920 checkNamedTypesImplemented(&fac->named_types);
2921
2922 generateChecksum(fac->name, &fac->checksum, &fac->events);
2923
2924 generated = TRUE;
2925 }
2926 else {
2927 printf("facility token was expected in file %s\n", in.name);
2928 ret = 1;
2929 goto parse_error;
2930 }
2931 }
2932
2933 parse_error:
2934 fclose(in.fp);
2935 open_error:
2936
2937 if(!generated) {
2938 printf("Cannot find facility %s\n", pathname);
2939 fac = NULL;
2940 }
2941
2942 return fac;
2943 }
2944
2945 /* Close the facility */
2946 void ltt_facility_close(facility_t *fac)
2947 {
2948 free(fac->name);
2949 free(fac->capname);
2950 free(fac->description);
2951 freeEvents(&fac->events);
2952 sequence_dispose(&fac->events);
2953 freeNamedType(&fac->named_types);
2954 table_dispose(&fac->named_types);
2955 freeTypes(&fac->unnamed_types);
2956 sequence_dispose(&fac->unnamed_types);
2957 free(fac);
2958 }
2959
2960
2961 /* Show help */
2962 void show_help(int argc, char ** argv)
2963 {
2964 printf("Genevent help : \n");
2965 printf("\n");
2966 printf("Use %s name.xml\n", argv[0]);
2967 printf("to create :\n");
2968 printf("ltt-facility-name.h\n");
2969 printf("ltt-facility-id-name.h\n");
2970 printf("ltt-facility-loader-name.h\n");
2971 printf("ltt-facility-loader-name.c\n");
2972 printf("In the current directory.\n");
2973 printf("\n");
2974 }
2975
2976 /* Parse program arguments */
2977 /* Return values :
2978 * 0 : continue program
2979 * -1 : stop program, return 0
2980 * > 0 : stop program, return value as exit.
2981 */
2982 int check_args(int argc, char **argv)
2983 {
2984 if(argc < 2) {
2985 printf("Not enough arguments\n");
2986 show_help(argc, argv);
2987 return EINVAL;
2988 }
2989
2990 if(strcmp(argv[1], "-h") == 0) {
2991 show_help(argc, argv);
2992 return -1;
2993 }
2994
2995 return 0;
2996 }
2997
2998 int main(int argc, char **argv)
2999 {
3000 int err = 0;
3001 facility_t *fac;
3002
3003 err = check_args(argc, argv);
3004 if(err > 0) return err;
3005 else if(err < 0) return 0;
3006
3007 /* open the facility */
3008 fac = ltt_facility_open(argv[1]);
3009 if(fac == NULL) {
3010 printf("Error opening file %s for reading : %s\n",
3011 argv[1], strerror(errno));
3012 return errno;
3013 }
3014
3015 /* generate the output C files */
3016
3017
3018 /* ltt-facility-name.h : main logging header.
3019 * log_header */
3020 err = print_log_header(fac);
3021 if(err) return err;
3022
3023 /* ltt-facility-id-name.h : facility id.
3024 * log_id_header */
3025 err = print_id_header(fac);
3026 if(err) return err;
3027
3028 /* ltt-facility-loader-name.h : facility specific loader info.
3029 * loader_header */
3030 if(!fac->user)
3031 err = print_loader_header(fac);
3032 else
3033 err = print_loader_header_user(fac);
3034 if(err) return err;
3035
3036 /* ltt-facility-loader-name.c : generic faciilty loader
3037 * loader_c */
3038 if(!fac->user)
3039 err = print_loader_c(fac);
3040 else
3041 err = print_loader_c_user(fac);
3042 if(err) return err;
3043
3044 /* close the facility */
3045 ltt_facility_close(fac);
3046
3047 return 0;
3048 }
3049
3050
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