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45e2d987efba15185e435cae228ae99b3fef9d3d
[m6w6/ext-psi] / src / context_validate.c
1 #ifdef HAVE_CONFIG_H
2 # include "config.h"
3 #endif
4
5 #include "php.h"
6
7 #include <sys/param.h>
8 #include <dlfcn.h>
9
10 #include "php_psi.h"
11 #include "php_psi_stdinc.h"
12 #include "php_psi_stdtypes.h"
13 #include "php_psi_macros.h"
14 #include "php_psi_redirs.h"
15
16 #include "calc.h"
17 #include "marshal.h"
18 #include "engine.h"
19
20 static int validate_lib(PSI_Data *data, void **dlopened) {
21 char lib[MAXPATHLEN];
22 const char *ptr = data->psi.file.ln;
23 size_t len;
24
25 if (!ptr) {
26 /* FIXME: assume stdlib */
27 return 1;
28 } else if (!strchr(ptr, '/')) {
29 len = snprintf(lib, MAXPATHLEN, "lib%s.%s", ptr, PHP_PSI_SHLIB_SUFFIX);
30 if (MAXPATHLEN == len) {
31 data->error(data, NULL, PSI_WARNING, "Library name too long: '%s'", ptr);
32 }
33 lib[len] = 0;
34 ptr = lib;
35 }
36 if (!(*dlopened = dlopen(ptr, RTLD_LAZY|RTLD_LOCAL))) {
37 data->error(data, NULL, PSI_WARNING, "Could not open library '%s': %s.",
38 data->psi.file.ln, dlerror());
39 return 0;
40 }
41 return 1;
42 }
43
44 static inline int locate_decl_type_alias(decl_typedefs *defs, decl_type *type) {
45 size_t i;
46 struct psi_std_type *stdtyp;
47
48 if (type->real) {
49 return 1;
50 }
51 if (defs) for (i = 0; i < defs->count; ++i) {
52 decl_arg *def = defs->list[i];
53
54 if (def->type->type != type->type && !strcmp(def->var->name, type->name)) {
55 type->real = def->type;
56 return 1;
57 }
58 }
59 for (stdtyp = &psi_std_types[0]; stdtyp->type_tag; ++stdtyp) {
60 if (!strcmp(type->name, stdtyp->alias ?: stdtyp->type_name)) {
61 type->type = stdtyp->type_tag;
62 return 1;
63 }
64 }
65
66 return 0;
67 }
68
69 static inline int locate_decl_type_struct(decl_structs *structs, decl_type *type) {
70 size_t i;
71
72 if (type->strct) {
73 return 1;
74 }
75 if (structs) for (i = 0; i < structs->count; ++i) {
76 if (!strcmp(structs->list[i]->name, type->name)) {
77 type->strct = structs->list[i];
78 return 1;
79 }
80 }
81 return 0;
82 }
83
84 static inline int locate_decl_type_union(decl_unions *unions, decl_type *type) {
85 size_t i;
86
87 if (type->unn) {
88 return 1;
89 }
90 if (unions) for (i = 0; i < unions->count; ++i) {
91 if (!strcmp(unions->list[i]->name, type->name)) {
92 type->unn = unions->list[i];
93 return 1;
94 }
95 }
96 return 0;
97 }
98
99 static inline int locate_decl_type_enum(decl_enums *enums, decl_type *type) {
100 size_t i;
101
102 if (type->enm) {
103 return 1;
104 }
105 if (enums) for (i = 0; i < enums->count; ++i) {
106 if (!strcmp(enums->list[i]->name, type->name)) {
107 type->enm = enums->list[i];
108 return 1;
109 }
110 }
111 return 0;
112 }
113
114 static inline int validate_decl_struct(PSI_Data *data, decl_struct *s);
115 static inline int validate_decl_union(PSI_Data *data, decl_union *u);
116 static inline int validate_decl_enum(PSI_Data *data, decl_enum *e);
117
118 static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
119 switch (type->type) {
120 case PSI_T_CHAR:
121 case PSI_T_SHORT:
122 case PSI_T_INT:
123 case PSI_T_LONG:
124 case PSI_T_NAME:
125 if (!locate_decl_type_alias(data->defs, type)) {
126 return 0;
127 }
128 if (type->real) {
129 return validate_decl_type(data, type->real);
130 }
131 return 1;
132 case PSI_T_STRUCT:
133 if (!locate_decl_type_struct(data->structs, type)) {
134 return 0;
135 }
136 break;
137 case PSI_T_UNION:
138 if (!locate_decl_type_union(data->unions, type)) {
139 return 0;
140 }
141 break;
142 case PSI_T_ENUM:
143 if (!locate_decl_type_enum(data->enums, type)) {
144 return 0;
145 }
146 }
147 return 1;
148 }
149 static inline int validate_decl_typedef(PSI_Data *data, decl_arg *def) {
150 if (!validate_decl_type(data, def->type)) {
151 data->error(data, def->token, PSI_WARNING,
152 "Type '%s' cannot be aliased to %s'%s'",
153 def->type->name, def->type->type == PSI_T_STRUCT?"struct ":"",
154 def->var->name);
155 return 0;
156 }
157 if (def->type->type == PSI_T_VOID && def->var->pointer_level) {
158 def->type->type = PSI_T_POINTER;
159 }
160 return 1;
161 }
162
163 static inline int validate_constant(PSI_Data *data, constant *c) {
164 /* FIXME */
165 return 1;
166 }
167
168 static inline int validate_decl_arg(PSI_Data *data, decl_arg *arg) {
169 if (!validate_decl_type(data, arg->type)) {
170 data->error(data, arg->type->token, PSI_WARNING,
171 "Cannot use '%s' as type for '%s'",
172 arg->type->name, arg->var->name);
173 return 0;
174 }
175 return 1;
176 }
177
178 static int psi_sort_struct_arg_cmp(const void *_a, const void *_b) {
179 decl_arg *a = *(decl_arg **)_a, *b = *(decl_arg **)_b;
180
181 if (a->layout->pos == b->layout->pos) {
182 if (a->layout->len == b->layout->len) {
183 return 0;
184 } else if (a->layout->len > b->layout->len) {
185 return -1;
186 } else {
187 return 1;
188 }
189 } else if (a->layout->pos > b->layout->pos) {
190 return 1;
191 } else {
192 return -1;
193 }
194 }
195 static void psi_sort_struct_arg_swp(void *a, void *b) {
196 decl_arg **_a = a, **_b = b, *_c;
197
198 _c = *_b;
199 *_b = *_a;
200 *_a = _c;
201 }
202 static inline void psi_sort_struct_args(void **args, size_t count) {
203 zend_insert_sort(args, count, sizeof(*args),
204 psi_sort_struct_arg_cmp, psi_sort_struct_arg_swp);
205 }
206
207 static inline int validate_decl_struct_darg(PSI_Data *data, decl_arg *darg, void *current) {
208 decl_type *real = real_decl_type(darg->type);
209
210 /* pre-validate any structs/unions/enums */
211 switch (real->type) {
212 case PSI_T_STRUCT:
213 if (current && current == real->strct) {
214 return 1;
215 }
216 if (!validate_decl_struct(data, real->strct)) {
217 return 0;
218 }
219 break;
220 case PSI_T_UNION:
221 if (current && current == real->unn) {
222 return 1;
223 }
224 if (!validate_decl_union(data, real->unn)) {
225 return 0;
226 }
227 break;
228 case PSI_T_ENUM:
229 if (current && current == real->enm) {
230 return 1;
231 }
232 if (!validate_decl_enum(data, real->enm)) {
233 return 0;
234 }
235 break;
236 }
237
238 return 1;
239 }
240
241 static inline size_t sizeof_decl_arg(decl_arg *darg) {
242 size_t size;
243 decl_type *real = real_decl_type(darg->type);
244
245 if (darg->var->array_size) {
246 if (darg->var->pointer_level > 2) {
247 size = psi_t_size(PSI_T_POINTER) * darg->var->array_size;
248 } else {
249 size = psi_t_size(real->type) * darg->var->array_size;
250 }
251 } else if (darg->var->pointer_level) {
252 size = psi_t_size(PSI_T_POINTER);
253 } else {
254 switch (real->type) {
255 case PSI_T_UNION:
256 size = real->unn->size;
257 break;
258 case PSI_T_STRUCT:
259 size = real->strct->size;
260 break;
261 case PSI_T_ENUM:
262 default:
263 size = psi_t_size(real->type);
264 break;
265 }
266 }
267
268 ZEND_ASSERT(size);
269
270 return size;
271 }
272
273 static inline size_t alignof_decl_type(decl_type *t);
274 static inline size_t alignof_decl_arg(decl_arg *darg);
275 static inline size_t alignof_decl_union(decl_union *u);
276 static inline size_t alignof_decl_struct(decl_struct *s);
277
278 static inline size_t alignof_decl_args(decl_args *args) {
279 size_t i, maxalign = 0;
280
281 for (i = 0; i < args->count; ++i) {
282 decl_arg *darg = args->args[i];
283 size_t align = alignof_decl_arg(darg);
284
285 if (align > maxalign) {
286 maxalign = align;
287 }
288 }
289
290 return maxalign;
291 }
292
293 static inline size_t alignof_decl_struct(decl_struct *s) {
294 if (!s->align) {
295 s->align = alignof_decl_args(s->args);
296 }
297 return s->align;
298 }
299
300 static inline size_t alignof_decl_union(decl_union *u) {
301 if (!u->align) {
302 u->align = alignof_decl_args(u->args);
303 }
304 return u->align;
305 }
306
307 static inline size_t alignof_decl_type(decl_type *t) {
308 decl_type *real = real_decl_type(t);
309 size_t align;
310
311 switch (real->type) {
312 case PSI_T_STRUCT:
313 align = alignof_decl_struct(real->strct);
314 break;
315 case PSI_T_UNION:
316 align = alignof_decl_union(real->unn);
317 break;
318 case PSI_T_ENUM:
319 default:
320 align = psi_t_alignment(real->type);
321 }
322
323 return align;
324 }
325
326 static inline size_t alignof_decl_arg(decl_arg *darg) {
327 size_t align;
328
329 if (darg->var->pointer_level && (!darg->var->array_size || darg->var->pointer_level > 2)) {
330 align = psi_t_alignment(PSI_T_POINTER);
331 } else {
332 align = alignof_decl_type(darg->type);
333 }
334
335 return align;
336 }
337
338 static inline size_t align_decl_arg(decl_arg *darg, size_t *pos, size_t *len) {
339 size_t align = alignof_decl_arg(darg);
340
341 ZEND_ASSERT(align);
342
343 *len = sizeof_decl_arg(darg);
344 *pos = psi_align(align, *pos);
345
346 return align;
347 }
348
349 static inline int validate_decl_struct(PSI_Data *data, decl_struct *s) {
350 size_t i, pos, len, size, align;
351
352 if (!s->size && !s->args->count) {
353 data->error(data, s->token, PSI_WARNING,
354 "Cannot compute size of empty struct %s",
355 s->name);
356 return 0;
357 }
358
359 for (i = 0; i < s->args->count; ++i) {
360 decl_arg *darg = s->args->args[i];
361
362 if (!validate_decl_arg(data, darg)) {
363 return 0;
364 }
365
366 ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
367 darg->var->arg = darg;
368
369 if (!validate_decl_struct_darg(data, darg, s)) {
370 return 0;
371 } else if (darg->layout) {
372 pos = darg->layout->pos;
373
374 align = align_decl_arg(darg, &pos, &len);
375
376 if (darg->layout->len != len) {
377 data->error(data, darg->token, PSI_WARNING,
378 "Computed size %zu of %s.%s does not match"
379 " pre-defined size %zu of type '%s'",
380 len, s->name, darg->var->name, darg->layout->len,
381 darg->type->name);
382 }
383 if (darg->layout->pos != pos) {
384 data->error(data, darg->token, PSI_WARNING,
385 "Computed offset %zu of %s.%s does not match"
386 " pre-defined offset %zu",
387 pos, s->name, darg->var->name, darg->layout->pos);
388 }
389 } else {
390 if (i) {
391 pos = s->args->args[i-1]->layout->pos +
392 s->args->args[i-1]->layout->len;
393 } else {
394 pos = 0;
395 }
396
397 align = align_decl_arg(darg, &pos, &len);
398 darg->layout = init_decl_struct_layout(pos, len);
399 }
400
401 if (align > s->align) {
402 s->align = align;
403 }
404 }
405
406 psi_sort_struct_args((void **) s->args->args, s->args->count);
407
408 if (s->args->count) {
409 decl_arg *darg = s->args->args[s->args->count-1];
410
411 size = darg->layout->pos + darg->layout->len;
412 if (s->size < size) {
413 s->size = psi_align(size, s->align);
414 }
415 }
416
417 return 1;
418 }
419
420 static inline int validate_decl_union(PSI_Data *data, decl_union *u) {
421 size_t i, pos, len, size = 0, align;
422
423 if (!u->size && !u->args->count) {
424 data->error(data, u->token, PSI_WARNING,
425 "Cannot compute size of empty union %s",
426 u->name);
427 return 0;
428 }
429
430 for (i = 0; i < u->args->count; ++i) {
431 decl_arg *darg = u->args->args[i];
432
433 if (!validate_decl_arg(data, darg)) {
434 return 0;
435 }
436
437 ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
438 darg->var->arg = darg;
439
440 if (!validate_decl_struct_darg(data, darg, u)) {
441 return 0;
442 } else if (darg->layout) {
443 pos = darg->layout->pos;
444
445 align = align_decl_arg(darg, &pos, &len);
446
447 if (darg->layout->pos != 0) {
448 data->error(data, darg->token, PSI_WARNING,
449 "Offset of %s.%s should be 0",
450 u->name, darg->var->name);
451 darg->layout->pos = 0;
452 }
453 if (darg->layout->len != len) {
454 data->error(data, darg->token, PSI_WARNING,
455 "Computed size %zu of %s.%s does not match"
456 " pre-defined size %zu of type '%s'",
457 len, u->name, darg->var->name, darg->layout->len,
458 darg->type->name);
459 }
460 } else {
461 pos = 0;
462
463 align = align_decl_arg(darg, &pos, &len);
464 darg->layout = init_decl_struct_layout(pos, len);
465
466 }
467 if (len > size) {
468 size = len;
469 }
470 if (align > u->align) {
471 u->align = align;
472 }
473 }
474
475 psi_sort_struct_args((void **) u->args->args, u->args->count);
476
477 if (u->size < size) {
478 u->size = psi_align(size, u->align);
479 }
480
481 return 1;
482 }
483
484 static const char * const abi_ccs[] = {
485 "default", /* \ */
486 "extern", /* > - all the same */
487 "cdecl", /* / */
488 "mscdecl",
489 "stdcall",
490 "fastcall",
491 };
492 static inline int validate_decl_abi(PSI_Data *data, decl_abi *abi) {
493 size_t i;
494
495 for (i = 0; i < sizeof(abi_ccs)/sizeof(char*); ++i) {
496 if (strcasecmp(abi->convention, abi_ccs[i])) {
497 return 1;
498 }
499 }
500 return 0;
501 }
502 static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_arg *func)
503 {
504 struct psi_func_redir *redir;
505
506 if (!strcmp(func->var->name, "dlsym")) {
507 data->error(data, func->token, PSI_WARNING, "Cannot dlsym dlsym (sic!)");
508 return 0;
509 }
510
511 if (!validate_decl_arg(data, func)) {
512 return 0;
513 }
514 for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
515 if (!strcmp(func->var->name, redir->name)) {
516 decl->call.sym = redir->func;
517 }
518 }
519 if (!decl->call.sym) {
520 #ifndef RTLD_NEXT
521 # define RTLD_NEXT ((void *) -1l)
522 #endif
523 decl->call.sym = dlsym(dl ?: RTLD_NEXT, func->var->name);
524 if (!decl->call.sym) {
525 data->error(data, func->token, PSI_WARNING,
526 "Failed to locate symbol '%s': %s",
527 func->var->name, dlerror() ?: "not found");
528 }
529 }
530 return 1;
531 }
532
533 static inline int validate_decl(PSI_Data *data, void *dl, decl *decl) {
534 if (!validate_decl_abi(data, decl->abi)) {
535 data->error(data, decl->abi->token, PSI_WARNING,
536 "Invalid calling convention: '%s'", decl->abi->token->text);
537 return 0;
538 }
539 if (!validate_decl_func(data, dl, decl, decl->func)) {
540 return 0;
541 }
542 if (decl->args) {
543 size_t i;
544
545 for (i = 0; i < decl->args->count; ++i) {
546 if (!validate_decl_arg(data, decl->args->args[i])) {
547 return 0;
548 }
549 }
550 }
551 return 1;
552 }
553 static inline decl_arg *locate_decl_var_arg(decl_var *var, decl_args *args, decl_arg *func) {
554 size_t i;
555
556 if (args) for (i = 0; i < args->count; ++i) {
557 decl_arg *arg = args->args[i];
558
559 if (!strcmp(var->name, arg->var->name)) {
560 ZEND_ASSERT(!var->arg || var->arg == arg);
561 return var->arg = arg;
562 }
563 }
564 if (func && !strcmp(var->name, func->var->name)) {
565 return var->arg = func;
566 }
567
568 return NULL;
569 }
570 static inline decl_arg *locate_struct_member(decl_struct *s, decl_var *var) {
571 if (s->args) {
572 return locate_decl_var_arg(var, s->args, NULL);
573 }
574
575 return NULL;
576 }
577 static inline constant *locate_num_exp_constant(num_exp *exp, constants *consts) {
578 size_t i;
579
580 for (i = 0; i < consts->count; ++i) {
581 constant *cnst = consts->list[i];
582
583 if (!strcmp(cnst->name, exp->u.numb)) {
584 free(exp->u.numb);
585 return exp->u.cnst = cnst;
586 }
587 }
588
589 return NULL;
590 }
591 static inline decl_enum_item *locate_num_exp_enum_item_ex(num_exp *exp, decl_enum *e) {
592 size_t k;
593
594 if (e) for (k = 0; k < e->items->count; ++k) {
595 decl_enum_item *i = e->items->list[k];
596
597 if (!strcmp(i->name, exp->u.dvar->name)) {
598 free_decl_var(exp->u.dvar);
599 exp->t = PSI_T_ENUM;
600 exp->u.enm = i;
601 return i;
602 }
603 }
604 return NULL;
605 }
606 static inline decl_enum_item *locate_num_exp_enum_item(num_exp *exp, decl_enums *enums) {
607 size_t j;
608
609 if (enums) for (j = 0; j < enums->count; ++j) {
610 decl_enum *e = enums->list[j];
611 decl_enum_item *i = locate_num_exp_enum_item_ex(exp, e);
612
613 if (i) {
614 return i;
615 }
616 }
617 return NULL;
618 }
619 static inline int validate_num_exp(PSI_Data *data, num_exp *exp, decl_args *dargs, decl_arg *func, decl_enum *enm) {
620 if (exp->operand) {
621 switch (exp->operator) {
622 case PSI_T_PLUS:
623 exp->calculator = psi_calc_add;
624 break;
625 case PSI_T_MINUS:
626 exp->calculator = psi_calc_sub;
627 break;
628 case PSI_T_ASTERISK:
629 exp->calculator = psi_calc_mul;
630 break;
631 case PSI_T_SLASH:
632 exp->calculator = psi_calc_div;
633 break;
634 EMPTY_SWITCH_DEFAULT_CASE();
635 }
636 if (!validate_num_exp(data, exp->operand, dargs, func, enm)) {
637 return 0;
638 }
639 }
640 switch (exp->t) {
641 case PSI_T_NAME:
642 if (!locate_decl_var_arg(exp->u.dvar, dargs, func)) {
643 if (!locate_num_exp_enum_item(exp, data->enums) && !locate_num_exp_enum_item_ex(exp, enm)) {
644 data->error(data, exp->token, PSI_WARNING, "Unknown variable '%s' in numeric expression",
645 exp->u.dvar->name);
646 return 0;
647 }
648 }
649 return 1;
650 case PSI_T_NSNAME:
651 if (!locate_num_exp_constant(exp, data->consts)) {
652 data->error(data, exp->token, PSI_WARNING, "Unknown constant '%s' in numeric expression",
653 exp->u.numb);
654 return 0;
655 }
656 return 1;
657 case PSI_T_NUMBER:
658 case PSI_T_ENUM:
659 return 1;
660 default:
661 return 0;
662 }
663 }
664
665 static inline int validate_decl_enum(PSI_Data *data, decl_enum *e) {
666 size_t j;
667
668 if (!e->items || !e->items->count) {
669 data->error(data, e->token, PSI_WARNING, "Empty enum '%s'", e->name);
670 return 0;
671 }
672
673 for (j = 0; j < e->items->count; ++j) {
674 decl_enum_item *i = e->items->list[j];
675
676 if (!i->num) {
677 if (j) {
678 i->inc.t = PSI_T_NUMBER;
679 i->inc.u.numb = "1";
680 i->inc.operator = PSI_T_PLUS;
681 i->inc.operand = i->prev->num ?: &i->prev->inc;
682 i->num = &i->inc;
683 } else {
684 i->inc.t = PSI_T_NUMBER;
685 i->inc.u.numb = "0";
686 i->num = &i->inc;
687 }
688 }
689 if (!validate_num_exp(data, i->num, NULL, NULL, e)) {
690 return 0;
691 }
692 }
693
694 return 1;
695 }
696
697 static inline int validate_set_value_handler(set_value *set) {
698 switch (set->func->type) {
699 case PSI_T_TO_BOOL:
700 set->func->handler = psi_to_bool;
701 break;
702 case PSI_T_TO_INT:
703 set->func->handler = psi_to_int;
704 break;
705 case PSI_T_TO_FLOAT:
706 set->func->handler = psi_to_double;
707 break;
708 case PSI_T_TO_STRING:
709 set->func->handler = psi_to_string;
710 break;
711 case PSI_T_TO_ARRAY:
712 set->func->handler = psi_to_array;
713 break;
714 case PSI_T_TO_OBJECT:
715 set->func->handler = psi_to_object;
716 break;
717 case PSI_T_VOID:
718 set->func->handler = psi_to_void;
719 break;
720 case PSI_T_ELLIPSIS:
721 if (set->outer.set && set->outer.set->func->type == PSI_T_TO_ARRAY) {
722 set->func->handler = psi_to_recursive;
723 set->inner = set->outer.set->inner;
724 set->count = set->outer.set->count;
725 break;
726 }
727 /* no break */
728 default:
729 return 0;
730 }
731 return 1;
732 }
733 static inline void decl_var_arg_v(decl_args *args, va_list argp) {
734 int argc;
735 decl_arg **argv;
736
737 memset(args, 0, sizeof(*args));
738
739 while ((argc = va_arg(argp, int))) {
740 argv = va_arg(argp, decl_arg **);
741 while (argc--) {
742 add_decl_arg(args, *argv++);
743 }
744 }
745 }
746 static inline int validate_set_value_ex(PSI_Data *data, set_value *set, decl_arg *ref, decl_args *ref_list) {
747 size_t i;
748 decl_type *ref_type;
749 decl_var *set_var = set->vars->vars[0];
750
751 if (!validate_set_value_handler(set)) {
752 data->error(data, set->func->token, PSI_WARNING, "Invalid cast '%s' in `set` statement", set->func->name);
753 return 0;
754 }
755
756 for (i = 0; i < set->vars->count; ++i) {
757 decl_var *svar = set->vars->vars[i];
758 if (!svar->arg && !locate_decl_var_arg(svar, ref_list, NULL)) {
759 data->error(data, svar->token, PSI_WARNING, "Unknown variable '%s' in `set` statement", svar->name);
760 return 0;
761 }
762 }
763
764 if (!ref) {
765 ref = set_var->arg;
766 }
767 ref_type = real_decl_type(ref->type);
768
769 if (set->count) {
770 int is_to_array = (set->func->type == PSI_T_TO_ARRAY);
771 int is_pointer_to_struct = (ref_type->type == PSI_T_STRUCT && ref->var->pointer_level);
772
773 if (!is_to_array && !is_pointer_to_struct) {
774 data->error(data, set->func->token, E_WARNING, "Inner `set` statement casts only work with "
775 "to_array() casts on structs or pointers: %s(%s...", set->func->name, set->vars->vars[0]->name);
776 return 0;
777 }
778 }
779 if (set->num) {
780 if (!validate_num_exp(data, set->num, ref_list, ref, NULL)) {
781 return 0;
782 }
783 }
784
785 if (ref_type->type == PSI_T_STRUCT) {
786 /* to_array(struct, to_...) */
787 if (!set->outer.set || set->outer.set->inner != set->inner) {
788 for (i = 0; i < set->count; ++i) {
789 decl_var *sub_var = set->inner[i]->vars->vars[0];
790 decl_arg *sub_ref = locate_struct_member(ref_type->strct, sub_var);
791
792 if (sub_ref) {
793 if (!validate_set_value_ex(data, set->inner[i], sub_ref, ref_type->strct->args)) {
794 return 0;
795 }
796 }
797 }
798 }
799 } else if (set->count == 1) {
800 /* to_array(ptr, to_string(*ptr)) */
801 decl_var *sub_var = set->inner[0]->vars->vars[0];
802 decl_arg *sub_ref = locate_decl_var_arg(sub_var, ref_list, ref);
803
804 if (sub_ref) {
805 if (strcmp(sub_var->name, set_var->name)) {
806 data->error(data, sub_var->token, E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
807 return 0;
808 }
809 if (!validate_set_value_ex(data, set->inner[0], sub_ref, ref_list)) {
810 return 0;
811 }
812 }
813 } else if (set->count > 1) {
814 data->error(data, set->func->token, E_WARNING, "Inner `set` statement casts on pointers may only occur once");
815 return 0;
816 }
817
818 return 1;
819 }
820 static inline int validate_set_value(PSI_Data *data, set_value *set, ...) {
821 va_list argp;
822 decl_args args = {0};
823 int check;
824
825 va_start(argp, set);
826 decl_var_arg_v(&args, argp);
827 va_end(argp);
828
829 check = validate_set_value_ex(data, set, NULL, &args);
830 if (args.args) {
831 free(args.args);
832 }
833 return check;
834 }
835 static inline decl *locate_impl_decl(decls *decls, return_stmt *ret) {
836 if (decls) {
837 size_t i;
838
839 for (i = 0; i < decls->count; ++i) {
840 if (!strcmp(decls->list[i]->func->var->name, ret->set->vars->vars[0]->name)) {
841 ret->decl = decls->list[i]->func;
842 return decls->list[i];
843 }
844 }
845 }
846
847 return NULL;
848 }
849 static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
850 return_stmt *ret;
851
852 /* we must have exactly one ret stmt delcaring the native func to call */
853 /* and which type cast to apply */
854 if (impl->stmts->ret.count != 1) {
855 if (impl->stmts->ret.count > 1) {
856 data->error(data, impl->stmts->ret.list[1]->token, PSI_WARNING,
857 "Too many `return` statements for implmentation %s;"
858 " found %zu, exactly one is needed",
859 impl->func->name, impl->stmts->ret.count);
860 } else {
861 data->error(data, impl->func->token, PSI_WARNING,
862 "Missing `return` statement for implementation %s",
863 impl->func->name);
864 }
865 return 0;
866 }
867
868 ret = impl->stmts->ret.list[0];
869
870 if (!(impl->decl = locate_impl_decl(data->decls, ret))) {
871 data->error(data, ret->token, PSI_WARNING,
872 "Missing declaration '%s' for `return` statment for implementation %s",
873 ret->set->vars->vars[0]->name, impl->func->name);
874 return 0;
875 }
876
877 if (!validate_set_value(data, ret->set, 1, &ret->decl, impl->decl->args ? (int) impl->decl->args->count : 0, impl->decl->args ? impl->decl->args->args : NULL, 0)) {
878 return 0;
879 }
880
881 impl->decl->impl = impl;
882
883 return 1;
884 }
885
886 static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
887 size_t i, j;
888 /* we can have multiple let stmts */
889
890 /* check that we have a decl arg for every let stmt */
891 for (i = 0; i < impl->stmts->let.count; ++i) {
892 let_stmt *let = impl->stmts->let.list[i];
893 decl_var *let_var;
894 int check = 0;
895
896 if (let->val && let->val->kind == PSI_LET_TMP) {
897 let_var = let->val->data.var;
898 } else {
899 let_var = let->var;
900 }
901
902 if (!locate_decl_var_arg(let_var, impl->decl->args, impl->decl->func)) {
903 data->error(data, let_var->token, PSI_WARNING, "Unknown variable '%s' in `let` statement"
904 " of implementation '%s'", let_var->name, impl->func->name);
905 return 0;
906 }
907
908 switch (let->val->kind) {
909 case PSI_LET_NULL:
910 break;
911 case PSI_LET_TMP:
912 /* e.g. let bar = &strval($bar); // decl_arg(char **bar) */
913 /* e.g. let foo = *bar; */
914 let->var->pointer_level = let->val->data.var->pointer_level;
915 let->var->arg = init_decl_arg(
916 init_decl_type(
917 real_decl_type(let->val->data.var->arg->type)->type,
918 real_decl_type(let->val->data.var->arg->type)->name),
919 init_decl_var(
920 let->var->name,
921 let->var->pointer_level,
922 let->var->array_size));
923 break;
924 case PSI_LET_NUMEXP:
925 if (!validate_num_exp(data, let->val->data.num, impl->decl->args, impl->decl->func, NULL)) {
926 return 0;
927 }
928 break;
929 case PSI_LET_CALLOC:
930 if (!validate_num_exp(data, let->val->data.alloc->nmemb, impl->decl->args, impl->decl->func, NULL)) {
931 return 0;
932 }
933 if (!validate_num_exp(data, let->val->data.alloc->size, impl->decl->args, impl->decl->func, NULL)) {
934 return 0;
935 }
936 break;
937 case PSI_LET_FUNC:
938 if (impl->func->args) {
939 for (j = 0; j < impl->func->args->count; ++j) {
940 impl_arg *iarg = impl->func->args->args[j];
941
942 if (!strcmp(let->val->data.func->var->name, iarg->var->name)) {
943 let->val->data.func->arg = iarg;
944 check = 1;
945 break;
946 }
947 }
948 }
949 if (!check) {
950 data->error(data, let->var->token, PSI_WARNING, "Unknown value '$%s' of `let` statement"
951 " for variable '%s' of implementation '%s'",
952 let->val->data.func->var->name, let->var->name, impl->func->name);
953 return 0;
954 }
955 break;
956 }
957 }
958
959 /* check that we have a let stmt for every decl arg */
960 if (impl->decl->args) for (i = 0; i < impl->decl->args->count; ++i) {
961 decl_arg *darg = impl->decl->args->args[i];
962 int check = 0;
963
964 for (j = 0; j < impl->stmts->let.count; ++j) {
965 let_stmt *let = impl->stmts->let.list[j];
966
967 if (!strcmp(let->var->name, darg->var->name)) {
968 darg->let = let;
969 check = 1;
970 break;
971 }
972 }
973 if (!check) {
974 data->error(data, impl->func->token, PSI_WARNING,
975 "Missing `let` statement for arg '%s %.*s%s'"
976 " of declaration '%s' for implementation '%s'",
977 darg->type->name, (int) darg->var->pointer_level, "*****",
978 darg->var->name, impl->decl->func->var->name, impl->func->name);
979 return 0;
980 }
981 }
982
983 return 1;
984 }
985 static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
986 size_t i, j, k;
987 /* we can have any count of set stmts; processing out vars */
988 /* check that set stmts reference known variables */
989 for (i = 0; i < impl->stmts->set.count; ++i) {
990 set_stmt *set = impl->stmts->set.list[i];
991 int check = 0;
992
993 if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
994 impl_arg *iarg = impl->func->args->args[j];
995
996 if (!strcmp(set->var->name, iarg->var->name)) {
997 set->arg = iarg;
998 check = 1;
999 break;
1000 }
1001 }
1002 if (!check) {
1003 data->error(data, set->var->token, PSI_WARNING, "Unknown variable '$%s' of `set` statement"
1004 " of implementation '%s'",
1005 set->var->name, impl->func->name);
1006 return 0;
1007 }
1008
1009 for (j = 0; j < set->val->vars->count; ++j) {
1010 decl_var *set_var = set->val->vars->vars[j];
1011
1012 check = 0;
1013 if (impl->decl->args) {
1014 for (k = 0; k < impl->decl->args->count; ++k) {
1015 decl_arg *set_arg = impl->decl->args->args[k];
1016
1017 if (!strcmp(set_var->name, set_arg->var->name)) {
1018 check = 1;
1019 set_var->arg = set_arg;
1020 if (!validate_set_value(data, set->val, 1, &set_arg, 1, &impl->decl->func, impl->decl->args->count, impl->decl->args->args, 0)) {
1021 return 0;
1022 }
1023 break;
1024 }
1025 }
1026 }
1027 if (!check) {
1028 for (k = 0; k < impl->stmts->let.count; ++k) {
1029 let_stmt *let = impl->stmts->let.list[k];
1030
1031 /* check temp vars */
1032 if (let->val && let->val->kind == PSI_LET_TMP) {
1033 if (!strcmp(set_var->name, let->var->name)) {
1034 check = 1;
1035 set_var->arg = let->var->arg;
1036 if (!validate_set_value(data, set->val, 1, &set_var->arg, 1, &impl->decl->func, impl->decl->args->count, impl->decl->args->args, 0)) {
1037 return 0;
1038 }
1039 break;
1040 }
1041 }
1042 }
1043 }
1044
1045 if (!check) {
1046 data->error(data, set_var->token, PSI_WARNING, "Unknown value '%s' of `set` statement"
1047 " for variable '$%s' of implementation '%s'",
1048 set_var->name, set->arg->var->name, impl->func->name);
1049 return 0;
1050 }
1051 }
1052 }
1053 return 1;
1054 }
1055 static inline decl *locate_free_decl(decls *decls, free_call *f) {
1056 if (decls) {
1057 size_t i;
1058
1059 for (i = 0; i < decls->count; ++i) {
1060 if (!strcmp(decls->list[i]->func->var->name, f->func)) {
1061 f->decl = decls->list[i];
1062 return decls->list[i];
1063 }
1064 }
1065 }
1066
1067 return NULL;
1068 }
1069 static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
1070 size_t i, j, k, l;
1071 /* we can have any count of free stmts; freeing any out vars */
1072 for (i = 0; i < impl->stmts->fre.count; ++i) {
1073 free_stmt *fre = impl->stmts->fre.list[i];
1074
1075 for (j = 0; j < fre->calls->count; ++j) {
1076 free_call *free_call = fre->calls->list[j];
1077
1078 /* first find the decl of the free func */
1079 if (!locate_free_decl(data->decls, free_call)) {
1080 data->error(data, free_call->token, PSI_WARNING,
1081 "Missing declaration '%s' in `free` statement"
1082 " of implementation '%s'",
1083 free_call->func, impl->func->name);
1084 return 0;
1085 }
1086
1087
1088
1089 /* now check for known vars */
1090 for (l = 0; l < free_call->vars->count; ++l) {
1091 int check = 0;
1092 decl_var *free_var = free_call->vars->vars[l];
1093
1094 if (!strcmp(free_var->name, impl->decl->func->var->name)) {
1095 check = 1;
1096 free_var->arg = impl->decl->func;
1097 } else if (impl->decl->args) {
1098 for (k = 0; k < impl->decl->args->count; ++k) {
1099 decl_arg *free_arg = impl->decl->args->args[k];
1100
1101 if (!strcmp(free_var->name, free_arg->var->name)) {
1102 check = 1;
1103 free_var->arg = free_arg;
1104 break;
1105 }
1106 }
1107 }
1108
1109 if (!check) {
1110 data->error(data, free_var->token, PSI_WARNING,
1111 "Unknown variable '%s' of `free` statement"
1112 " of implementation '%s'",
1113 free_var->name, impl->func->name);
1114 return 0;
1115 }
1116 }
1117 }
1118 }
1119 return 1;
1120 }
1121 static inline int validate_impl_stmts(PSI_Data *data, impl *impl) {
1122 if (!impl->stmts) {
1123 data->error(data, impl->func->token, PSI_WARNING,
1124 "Missing body for implementation %s!",
1125 impl->func->name);
1126 return 0;
1127 }
1128
1129 if (!validate_impl_ret_stmt(data, impl)) {
1130 return 0;
1131 }
1132
1133 if (!validate_impl_let_stmts(data, impl)) {
1134 return 0;
1135 }
1136 if (!validate_impl_set_stmts(data, impl)) {
1137 return 0;
1138 }
1139 if (!validate_impl_free_stmts(data, impl)) {
1140 return 0;
1141 }
1142
1143 return 1;
1144 }
1145
1146 static inline int validate_impl_args(PSI_Data *data, impl *impl) {
1147 int def = 0;
1148 size_t i;
1149
1150 for (i = 0; i < impl->func->args->count; ++i) {
1151 impl_arg *iarg = impl->func->args->args[i];
1152
1153 if (iarg->def) {
1154 def = 1;
1155 } else if (def) {
1156 data->error(data, impl->func->token, PSI_WARNING,
1157 "Non-optional argument %zu '$%s' of implementation '%s'"
1158 " follows optional argument",
1159 i+1, iarg->var->name, impl->func->name);
1160 return 0;
1161 }
1162 }
1163
1164 return 1;
1165 }
1166
1167 static inline int validate_impl(PSI_Data *data, impl *impl) {
1168 if (!validate_impl_args(data, impl)) {
1169 return 0;
1170 }
1171 return validate_impl_stmts(data, impl);
1172 }
1173
1174
1175 int PSI_ContextValidate(PSI_Context *C, PSI_Parser *P)
1176 {
1177 PSI_Data *D;
1178 void *dlopened = NULL;
1179 size_t i, count = C->count++, check_round, check_count;
1180 decl_typedefs *check_defs = P->defs;
1181 decl_structs *check_structs = P->structs;
1182 decl_unions *check_unions = P->unions;
1183 decl_enums *check_enums = P->enums;
1184 unsigned silent = C->flags & PSI_PARSER_SILENT;
1185
1186 C->data = realloc(C->data, C->count * sizeof(*C->data));
1187 D = PSI_DataExchange(&C->data[count], PSI_DATA(P));
1188
1189 #define REVALIDATE(what) do { \
1190 if (check_round && check_ ##what) { \
1191 free(check_ ##what->list); \
1192 free(check_ ##what); \
1193 } \
1194 check_ ##what = recheck_ ##what; \
1195 } while (0)
1196 #define CHECK_TOTAL (CHECK_COUNT(defs) + CHECK_COUNT(structs) + CHECK_COUNT(enums))
1197 #define CHECK_COUNT(of) (check_ ##of ? check_ ##of->count : 0)
1198
1199 if (!silent) {
1200 /* no warnings on first round */
1201 C->flags |= PSI_PARSER_SILENT;
1202 }
1203 for (check_round = 0, check_count = 0; CHECK_TOTAL && check_count != CHECK_TOTAL; ++check_round) {
1204 decl_typedefs *recheck_defs = NULL;
1205 decl_structs *recheck_structs = NULL;
1206 decl_unions *recheck_unions = NULL;
1207 decl_enums *recheck_enums = NULL;
1208
1209 check_count = CHECK_TOTAL;
1210
1211 for (i = 0; i < CHECK_COUNT(defs); ++i) {
1212 if (validate_decl_typedef(PSI_DATA(C), check_defs->list[i])) {
1213 C->defs = add_decl_typedef(C->defs, check_defs->list[i]);
1214 } else {
1215 recheck_defs = add_decl_typedef(recheck_defs, check_defs->list[i]);
1216 }
1217 }
1218 for (i = 0; i < CHECK_COUNT(structs); ++i) {
1219 if (validate_decl_struct(PSI_DATA(C), check_structs->list[i])) {
1220 C->structs = add_decl_struct(C->structs, check_structs->list[i]);
1221 } else {
1222 recheck_structs = add_decl_struct(recheck_structs, check_structs->list[i]);
1223 }
1224 }
1225 for (i = 0; i < CHECK_COUNT(unions); ++i) {
1226 if (validate_decl_union(PSI_DATA(C), check_unions->list[i])) {
1227 C->unions = add_decl_union(C->unions, check_unions->list[i]);
1228 } else {
1229 recheck_unions = add_decl_union(recheck_unions, check_unions->list[i]);
1230 }
1231 }
1232 for (i = 0; i < CHECK_COUNT(enums); ++i) {
1233 if (validate_decl_enum(PSI_DATA(C), check_enums->list[i])) {
1234 C->enums = add_decl_enum(C->enums, check_enums->list[i]);
1235 } else {
1236 recheck_enums = add_decl_enum(recheck_enums, check_enums->list[i]);
1237 }
1238 }
1239
1240 REVALIDATE(defs);
1241 REVALIDATE(structs);
1242 REVALIDATE(unions);
1243 REVALIDATE(enums);
1244
1245 if (check_round == 0 && !silent) {
1246 C->flags &= ~PSI_PARSER_SILENT;
1247 }
1248 }
1249
1250
1251 if (D->consts) {
1252 for (i = 0; i < D->consts->count; ++i) {
1253 if (validate_constant(PSI_DATA(C), D->consts->list[i])) {
1254 C->consts = add_constant(C->consts, D->consts->list[i]);
1255 }
1256 }
1257 }
1258
1259 if (!validate_lib(D, &dlopened)) {
1260 return 0;
1261 }
1262
1263 add_decl_lib(&C->psi.libs, dlopened);
1264
1265 if (D->decls) {
1266 for (i = 0; i < D->decls->count; ++i) {
1267 if (validate_decl(PSI_DATA(C), dlopened, D->decls->list[i])) {
1268 C->decls = add_decl(C->decls, D->decls->list[i]);
1269 }
1270 }
1271 }
1272 if (D->impls) {
1273 for (i = 0; i < D->impls->count; ++i) {
1274 if (validate_impl(PSI_DATA(C), D->impls->list[i])) {
1275 C->impls = add_impl(C->impls, D->impls->list[i]);
1276 }
1277 }
1278 }
1279
1280 return 1;
1281 }
1282
1283 int PSI_ContextValidateData(PSI_Data *dest, PSI_Data *source)
1284 {
1285 size_t i;
1286 int errors = 0;
1287
1288 if (source->defs) for (i = 0; i < source->defs->count; ++i) {
1289 decl_arg *def = source->defs->list[i];
1290
1291 if (validate_decl_typedef(source, def)) {
1292 if (dest) {
1293 dest->defs = add_decl_typedef(dest->defs, def);
1294 }
1295 } else {
1296 ++errors;
1297 }
1298 }
1299
1300 if (source->consts) for (i = 0; i < source->consts->count; ++i) {
1301 constant *constant = source->consts->list[i];
1302
1303 if (validate_constant(source, constant)) {
1304 if (dest) {
1305 dest->consts = add_constant(dest->consts, constant);
1306 }
1307 } else {
1308 ++errors;
1309 }
1310 }
1311
1312 if (source->structs) for (i = 0; i < source->structs->count; ++i) {
1313 decl_struct *dstruct = source->structs->list[i];
1314
1315 if (validate_decl_struct(source, dstruct)) {
1316 if (dest) {
1317 dest->structs = add_decl_struct(dest->structs, dstruct);
1318 }
1319 } else {
1320 ++errors;
1321 }
1322 }
1323
1324 if (source->unions) for (i = 0; i < source->unions->count; ++i) {
1325 decl_union *dunion = source->unions->list[i];
1326
1327 if (validate_decl_union(source, dunion)) {
1328 if (dest) {
1329 dest->unions = add_decl_union(dest->unions, dunion);
1330 }
1331 } else {
1332 ++errors;
1333 }
1334 }
1335
1336 if (source->enums) for (i = 0; i < source->enums->count; ++i) {
1337 decl_enum *denum = source->enums->list[i];
1338
1339 if (validate_decl_enum(source, denum)) {
1340 if (dest) {
1341 dest->enums = add_decl_enum(dest->enums, denum);
1342 }
1343 } else {
1344 ++errors;
1345 }
1346 }
1347
1348 if (source->decls) for (i = 0; i < source->decls->count; ++i) {
1349 decl *decl = source->decls->list[i];
1350
1351 if (validate_decl(source, NULL, decl)) {
1352 if (dest) {
1353 dest->decls = add_decl(dest->decls, decl);
1354 }
1355 } else {
1356 ++errors;
1357 }
1358 }
1359
1360 if (source->impls) for (i = 0; i < source->impls->count; ++i) {
1361 impl *impl = source->impls->list[i];
1362
1363 if (validate_impl(source, impl)) {
1364 if (dest) {
1365 dest->impls = add_impl(dest->impls, impl);
1366 }
1367 } else {
1368 ++errors;
1369 }
1370 }
1371
1372 return errors;
1373 }
PHP System Interface / POSIX Standard Interface