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7f491b86fdc51d9cb208331fe09628ce93774dd3
[m6w6/ext-psi] / src / context.c
1 #ifdef HAVE_CONFIG_H
2 # include "config.h"
3 #endif
4
5 #include "php.h"
6
7 #include <stdio.h>
8 #ifdef HAVE_SYS_TYPES_H
9 # include <sys/types.h>
10 #endif
11 #ifdef HAVE_SYS_STAT_H
12 # include <sys/stat.h>
13 #endif
14 #ifdef STDC_HEADERS
15 # include <stdlib.h>
16 # include <stddef.h>
17 #else
18 # ifdef HAVE_STDLIB_H
19 # include <stdlib.h>
20 # endif
21 #endif
22 #ifdef HAVE_STRING_H
23 # if !defined STDC_HEADERS && defined HAVE_MEMORY_H
24 # include <memory.h>
25 # endif
26 # include <string.h>
27 #endif
28 #ifdef HAVE_STRINGS_H
29 # include <strings.h>
30 #endif
31 #ifdef HAVE_INTTYPES_H
32 # include <inttypes.h>
33 #endif
34 #ifdef HAVE_STDINT_H
35 # include <stdint.h>
36 #endif
37 #ifdef HAVE_UNISTD_H
38 # include <unistd.h>
39 #endif
40
41 #ifdef HAVE_ERRNO_H
42 # include <errno.h>
43 #endif
44 #ifdef HAVE_GLOB_H
45 # include <glob.h>
46 #endif
47 #ifdef HAVE_NETINET_IN_H
48 # include <netinet/in.h>
49 #endif
50 #ifdef HAVE_ARPA_NAMESER_H
51 # include <arpa/nameser.h>
52 #endif
53 #ifdef HAVE_NETDB_H
54 # include <netdb.h>
55 #endif
56 #ifdef HAVE_RESOLV_H
57 # include <resolv.h>
58 #endif
59 #ifdef HAVE_SYS_SELECT_H
60 # include <sys/select.h>
61 #endif
62 #ifdef HAVE_SYS_SOCKET_H
63 # include <sys/socket.h>
64 #endif
65 #ifdef HAVE_SYS_TIME_H
66 # include <sys/time.h>
67 #endif
68 #ifdef HAVE_SYS_TIMES_H
69 # include <sys/times.h>
70 #endif
71 #ifdef HAVE_SYS_UIO_H
72 # include <sys/uio.h>
73 #endif
74 #ifdef HAVE_SYS_UTSNAME_H
75 # include <sys/utsname.h>
76 #endif
77 #ifdef HAVE_TIME_H
78 # include <time.h>
79 #endif
80 #ifdef HAVE_WCHAR_H
81 # include <wchar.h>
82 #endif
83
84 #ifdef HAVE_DIRENT_H
85 # include <dirent.h>
86 # define NAMLEN(dirent) strlen ((dirent)->d_name)
87 #else
88 # define dirent direct
89 # define NAMLEN(dirent) ((dirent)->d_namlen)
90 # ifdef HAVE_SYS_NDIR_H
91 # include <sys/ndir.h>
92 # endif
93 # ifdef HAVE_SYS_DIR_H
94 # include <sys/dir.h>
95 # endif
96 # ifdef HAVE_NDIR_H
97 # include <ndir.h>
98 # endif
99 #endif
100
101 #include <sys/param.h>
102 #include <dlfcn.h>
103 #include <fnmatch.h>
104
105 #include "php.h"
106 #include "php_scandir.h"
107 #include "php_psi.h"
108 #include "context.h"
109 #include "parser.h"
110
111 #include "libjit.h"
112 #include "libffi.h"
113
114 static struct psi_std_type {
115 token_t type_tag;
116 const char *type_name;
117 } psi_std_types[] = {
118 {PSI_T_FLOAT, "float"},
119 {PSI_T_DOUBLE, "double"},
120 {PSI_T_INT8, "int8_t"},
121 {PSI_T_INT16, "int16_t"},
122 {PSI_T_INT32, "int32_t"},
123 {PSI_T_INT64, "int64_t"},
124 {PSI_T_UINT8, "uint8_t"},
125 {PSI_T_UINT16, "uint16_t"},
126 {PSI_T_UINT32, "uint32_t"},
127 {PSI_T_UINT64, "uint64_t"},
128 {0}
129 };
130
131 static struct psi_predef_type {
132 token_t type_tag;
133 const char *type_name;
134 const char *alias;
135 } psi_predef_types[] = {
136 PSI_TYPES
137 {0}
138 };
139
140 static struct psi_predef_const {
141 token_t type_tag;
142 const char *type_name;
143 const char *var_name;
144 const char *val_text;
145 token_t val_type_tag;
146 } psi_predef_consts[] = {
147 PSI_CONSTS
148 {0}
149 };
150
151 PSI_MACROS
152
153 static struct psi_func_redir {
154 const char *name;
155 void (*func)(void);
156 } psi_func_redirs[] = {
157 PSI_REDIRS
158 {0}
159 };
160
161 static struct psi_predef_decl {
162 token_t type_tag;
163 const char *type_name;
164 const char *var_name;
165 size_t pointer_level;
166 size_t array_size;
167 } psi_predef_decls[] = {
168 PSI_DECLS
169 {0}
170 };
171
172 static struct psi_predef_struct {
173 token_t type_tag;
174 const char *type_name;
175 const char *var_name;
176 size_t offset;
177 size_t size;
178 size_t pointer_level;
179 size_t array_size;
180 } psi_predef_structs[] = {
181 PSI_STRUCTS
182 {0}
183 };
184
185 static int validate_lib(PSI_Data *data, void **dlopened) {
186 char lib[MAXPATHLEN];
187 const char *ptr = data->psi.file.ln;
188 size_t len;
189
190 if (!ptr) {
191 /* FIXME: assume stdlib */
192 return 1;
193 } else if (!strchr(ptr, '/')) {
194 len = snprintf(lib, MAXPATHLEN, "lib%s.%s", ptr, PHP_PSI_SHLIB_SUFFIX);
195 if (MAXPATHLEN == len) {
196 data->error(PSI_WARNING, "Library name too long: '%s'", ptr);
197 }
198 lib[len] = 0;
199 ptr = lib;
200 }
201 if (!(*dlopened = dlopen(ptr, RTLD_LAZY|RTLD_LOCAL))) {
202 data->error(PSI_WARNING, "Could not open library '%s': %s.",
203 data->psi.file.ln, dlerror());
204 return 0;
205 }
206 return 1;
207 }
208
209 static inline int locate_decl_type_alias(decl_typedefs *defs, decl_type *type) {
210 size_t i;
211 struct psi_std_type *stdtyp;
212
213 if (type->real) {
214 return 1;
215 }
216 for (i = 0; i < defs->count; ++i) {
217 decl_typedef *def = defs->list[i];
218
219 if (def->type->type != type->type && !strcmp(def->alias, type->name)) {
220 type->real = def->type;
221 return 1;
222 }
223 }
224 for (stdtyp = &psi_std_types[0]; stdtyp->type_tag; ++stdtyp) {
225 if (!strcmp(type->name, stdtyp->type_name)) {
226 type->type = stdtyp->type_tag;
227 return 1;
228 }
229 }
230
231 return 0;
232 }
233 static inline int locate_decl_type_struct(decl_structs *structs, decl_type *type) {
234 size_t i;
235
236 if (type->strct) {
237 return 1;
238 }
239 for (i = 0; i < structs->count; ++i) {
240 if (!strcmp(structs->list[i]->name, type->name)) {
241 type->strct = structs->list[i];
242 return 1;
243 }
244 }
245 return 0;
246 }
247
248 static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
249 switch (type->type) {
250 case PSI_T_NAME:
251 if (!data->defs || !locate_decl_type_alias(data->defs, type)) {
252 return 0;
253 }
254 if (type->real) {
255 return validate_decl_type(data, type->real);
256 }
257 return 1;
258 case PSI_T_STRUCT:
259 if (!data->structs || !locate_decl_type_struct(data->structs, type)) {
260 return 0;
261 }
262 break;
263 }
264 return 1;
265 }
266 static inline int validate_decl_typedef(PSI_Data *data, decl_typedef *def) {
267 if (!validate_decl_type(data, def->type)) {
268 data->error(PSI_WARNING, "Type '%s' cannot be aliased to %s'%s'",
269 def->type->name, def->type->type == PSI_T_STRUCT?"struct ":"",def->alias);
270 return 0;
271 }
272 /* FIXME: check def->alias */
273 return 1;
274 }
275
276 static inline int validate_constant(PSI_Data *data, constant *c) {
277 /* FIXME */
278 return 1;
279 }
280
281 static inline int validate_decl_arg(PSI_Data *data, decl_arg *arg) {
282 if (!validate_decl_type(data, arg->type)) {
283 data->error(PSI_WARNING, "Cannot use '%s'(%d) as type for '%s'",
284 arg->type->name, arg->type->type, arg->var->name);
285 return 0;
286 }
287 return 1;
288 }
289
290 static inline int validate_decl_struct(PSI_Data *data, decl_struct *s) {
291 size_t i;
292
293 for (i = 0; i < s->args->count; ++i) {
294 if (!validate_decl_arg(data, s->args->args[i])) {
295 return 0;
296 }
297 }
298
299 for (i = 0; i < s->args->count; ++i) {
300 decl_arg *darg = s->args->args[i];
301
302 if (!validate_decl_arg(data, darg)) {
303 return 0;
304 }
305
306 ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
307 darg->var->arg = darg;
308
309 if (!darg->layout) {
310 token_t t;
311
312 if (darg->var->pointer_level && (!darg->var->array_size || darg->var->pointer_level == 1)) {
313 t = PSI_T_POINTER;
314 } else {
315 t = real_decl_type(darg->type)->type;
316 }
317
318 if (i) {
319 decl_arg *last = s->args->args[i-1];
320 darg->layout = init_decl_struct_layout(
321 psi_t_align(t, last->layout->pos + last->layout->len),
322 psi_t_size(t) * darg->var->array_size);
323 } else {
324 darg->layout = init_decl_struct_layout(0, psi_t_size(t));
325 }
326 }
327 if (s->size < darg->layout->pos + darg->layout->len) {
328 s->size = darg->layout->pos + darg->layout->len;
329 }
330 }
331 return 1;
332 }
333
334 static const char * const abi_ccs[] = {
335 "default", /* \ */
336 "extern", /* > - all the same */
337 "cdecl", /* / */
338 "stdcall",
339 "fastcall",
340 };
341 static inline int validate_decl_abi(PSI_Data *data, decl_abi *abi) {
342 size_t i;
343
344 for (i = 0; i < sizeof(abi_ccs)/sizeof(char*); ++i) {
345 if (strcasecmp(abi->convention, abi_ccs[i])) {
346 return 1;
347 }
348 }
349 data->error(PSI_WARNING, "Invalid calling convention: '%s'", abi->convention);
350 return 0;
351 }
352 static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_arg *func)
353 {
354 struct psi_func_redir *redir;
355
356 if (!strcmp(func->var->name, "dlsym")) {
357 data->error(PSI_WARNING, "Cannot dlsym dlsym (sic!)");
358 return 0;
359 }
360
361 if (!validate_decl_arg(data, func)) {
362 return 0;
363 }
364 for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
365 if (!strcmp(func->var->name, redir->name)) {
366 decl->call.sym = redir->func;
367 }
368 }
369 if (!decl->call.sym) {
370 #ifndef RTLD_NEXT
371 # define RTLD_NEXT ((void *) -1l)
372 #endif
373 decl->call.sym = dlsym(dl ?: RTLD_NEXT, func->var->name);
374 if (!decl->call.sym) {
375 data->error(PSI_WARNING, "Failed to locate symbol '%s': %s",
376 func->var->name, dlerror());
377 }
378 }
379 return 1;
380 }
381
382 static inline int validate_decl(PSI_Data *data, void *dl, decl *decl) {
383 if (!validate_decl_abi(data, decl->abi)) {
384 return 0;
385 }
386 if (!validate_decl_func(data, dl, decl, decl->func)) {
387 return 0;
388 }
389 if (decl->args) {
390 size_t i;
391
392 for (i = 0; i < decl->args->count; ++i) {
393 if (!validate_decl_arg(data, decl->args->args[i])) {
394 return 0;
395 }
396 }
397 }
398 return 1;
399 }
400 static inline decl_arg *locate_decl_var_arg(decl_var *var, decl_args *args) {
401 size_t i;
402
403 for (i = 0; i < args->count; ++i) {
404 decl_arg *arg = args->args[i];
405
406 if (!strcmp(var->name, arg->var->name)) {
407 ZEND_ASSERT(!var->arg || var->arg == arg);
408 return var->arg = arg;
409 }
410 }
411
412 return NULL;
413 }
414 static inline decl_arg *locate_struct_member(decl_struct *s, decl_var *var) {
415 if (s->args) {
416 return locate_decl_var_arg(var, s->args);
417 }
418
419 return NULL;
420 }
421 static inline constant *locate_num_exp_constant(num_exp *exp, constants *consts) {
422 size_t i;
423
424 for (i = 0; i < consts->count; ++i) {
425 constant *cnst = consts->list[i];
426
427 if (!strcmp(cnst->name, exp->u.numb)) {
428 free(exp->u.numb);
429 return exp->u.cnst = cnst;
430 }
431 }
432
433 return NULL;
434 }
435 static inline int validate_num_exp(PSI_Data *data, decl_args *dargs, num_exp *exp) {
436 if (exp->operand) {
437 switch (exp->operator) {
438 case PSI_T_PLUS:
439 exp->calculator = psi_calc_add;
440 break;
441 case PSI_T_MINUS:
442 exp->calculator = psi_calc_sub;
443 break;
444 case PSI_T_ASTERISK:
445 exp->calculator = psi_calc_mul;
446 break;
447 case PSI_T_SLASH:
448 exp->calculator = psi_calc_div;
449 break;
450 EMPTY_SWITCH_DEFAULT_CASE();
451 }
452 if (!validate_num_exp(data, dargs, exp->operand)) {
453 return 0;
454 }
455 }
456 switch (exp->t) {
457 case PSI_T_NAME:
458 if (!locate_decl_var_arg(exp->u.dvar, dargs)) {
459 data->error(PSI_WARNING, "Unknown variable '%s' in numeric expression",
460 exp->u.dvar->name);
461 return 0;
462 }
463 return 1;
464 case PSI_T_NSNAME:
465 if (!locate_num_exp_constant(exp, data->consts)) {
466 data->error(PSI_WARNING, "Unknown constant '%s' in numeric expression",
467 exp->u.numb);
468 return 0;
469 }
470 return 1;
471 case PSI_T_NUMBER:
472 return 1;
473 default:
474 return 0;
475 }
476 }
477 static inline int validate_set_value(PSI_Data *data, set_value *set, decl_arg *ref, decl_args *ref_list) {
478 size_t i;
479 decl_type *ref_type = real_decl_type(ref->type);
480 decl_var *set_var = set->vars->vars[0];
481
482 switch (set->func->type) {
483 case PSI_T_TO_BOOL:
484 set->func->handler = psi_to_bool;
485 break;
486 case PSI_T_TO_INT:
487 set->func->handler = psi_to_int;
488 break;
489 case PSI_T_TO_FLOAT:
490 set->func->handler = psi_to_double;
491 break;
492 case PSI_T_TO_STRING:
493 set->func->handler = psi_to_string;
494 break;
495 case PSI_T_TO_ARRAY:
496 set->func->handler = psi_to_array;
497 break;
498 case PSI_T_TO_OBJECT:
499 set->func->handler = psi_to_object;
500 break;
501 case PSI_T_VOID:
502 set->func->handler = psi_to_void;
503 break;
504 EMPTY_SWITCH_DEFAULT_CASE();
505 }
506
507 for (i = 1; i < set->vars->count; ++i) {
508 if (!locate_decl_var_arg(set->vars->vars[i], ref_list)) {
509 return 0;
510 }
511 }
512 set_var->arg = ref;
513
514 if (set->count) {
515 int is_to_array = (set->func->type == PSI_T_TO_ARRAY);
516 int is_pointer_to_struct = (ref_type->type == PSI_T_STRUCT && ref->var->pointer_level);
517
518 if (!is_to_array && !is_pointer_to_struct) {
519 data->error(E_WARNING, "Inner `set` statement casts only work with "
520 "to_array() casts on structs or pointers: %s(%s...", set->func->name, set->vars->vars[0]->name);
521 return 0;
522 }
523 }
524 if (set->num) {
525 if (!validate_num_exp(data, ref_list, set->num)) {
526 return 0;
527 }
528 }
529
530 if (ref_type->type == PSI_T_STRUCT) {
531 /* to_array(struct, to_...) */
532 for (i = 0; i < set->count; ++i) {
533 decl_var *sub_var = set->inner[i]->vars->vars[0];
534 decl_arg *sub_ref = locate_struct_member(ref_type->strct, sub_var);
535
536 set->inner[i]->outer.set = set;
537 if (sub_ref) {
538 if (!validate_set_value(data, set->inner[i], sub_ref, ref_type->strct->args)) {
539 return 0;
540 }
541 }
542 }
543 } else if (set->count == 1) {
544 /* to_array(ptr, to_string(*ptr)) */
545 decl_var *sub_var = set->inner[0]->vars->vars[0];
546 decl_arg *sub_ref = locate_decl_var_arg(sub_var, ref_list);
547
548 set->inner[0]->outer.set = set;
549 if (sub_ref) {
550 if (strcmp(sub_var->name, set_var->name)) {
551 data->error(E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
552 return 0;
553 }
554 if (!validate_set_value(data, set->inner[0], sub_ref, ref_list)) {
555 return 0;
556 }
557 }
558 } else if (set->count > 1) {
559 data->error(E_WARNING, "Inner `set` statement casts on pointers may only occur once");
560 return 0;
561 }
562
563 return 1;
564 }
565 static inline decl *locate_impl_decl(decls *decls, return_stmt *ret) {
566 if (decls) {
567 size_t i;
568
569 for (i = 0; i < decls->count; ++i) {
570 if (!strcmp(decls->list[i]->func->var->name, ret->set->vars->vars[0]->name)) {
571 ret->decl = decls->list[i]->func;
572 return decls->list[i];
573 }
574 }
575 }
576
577 return NULL;
578 }
579 static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
580 return_stmt *ret;
581
582 /* we must have exactly one ret stmt delcaring the native func to call */
583 /* and which type cast to apply */
584 if (impl->stmts->ret.count != 1) {
585 if (impl->stmts->ret.count > 1) {
586 data->error(PSI_WARNING, "Too many `return` statements for implmentation %s;"
587 " found %zu, exactly one is needed",
588 impl->func->name, impl->stmts->ret.count);
589 } else {
590 data->error(PSI_WARNING, "Missing `return` statement for implementation %s",
591 impl->func->name);
592 }
593 return 0;
594 }
595
596 ret = impl->stmts->ret.list[0];
597
598 if (!(impl->decl = locate_impl_decl(data->decls, ret))) {
599 data->error(PSI_WARNING, "Missing declaration for implementation %s",
600 impl->func->name);
601 return 0;
602 }
603
604 if (!validate_set_value(data, ret->set, ret->decl, impl->decl->args)) {
605 return 0;
606 }
607
608 impl->decl->impl = impl;
609
610 return 1;
611 }
612
613 static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
614 size_t i, j;
615 /* we can have multiple let stmts */
616 /* check that we have a let stmt for every decl arg */
617 if (impl->decl->args) for (i = 0; i < impl->decl->args->count; ++i) {
618 decl_arg *darg = impl->decl->args->args[i];
619 int check = 0;
620
621 for (j = 0; j < impl->stmts->let.count; ++j) {
622 let_stmt *let = impl->stmts->let.list[j];
623
624 if (!strcmp(let->var->name, darg->var->name)) {
625 darg->let = let;
626 check = 1;
627 break;
628 }
629 }
630 if (!check) {
631 data->error(PSI_WARNING, "Missing `let` statement for arg '%s %.*s%s'"
632 " of declaration '%s' for implementation '%s'",
633 darg->type->name, (int) darg->var->pointer_level, "*****",
634 darg->var->name, impl->decl->func->var->name, impl->func->name);
635 return 0;
636 }
637 }
638 /* check that the let_value references a known variable or NULL */
639 for (i = 0; i < impl->stmts->let.count; ++i) {
640 let_stmt *let = impl->stmts->let.list[i];
641 int check = 0;
642
643 if (let->val && let->val->func && let->val->func->alloc) {
644 if (!validate_num_exp(data, impl->decl->args, let->val->func->alloc->nmemb)) {
645 return 0;
646 }
647 if (!validate_num_exp(data, impl->decl->args, let->val->func->alloc->size)) {
648 return 0;
649 }
650 }
651 if (let->val && let->val->var) {
652 if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
653 impl_arg *iarg = impl->func->args->args[j];
654
655 if (!strcmp(let->val->var->name, iarg->var->name)) {
656 let->arg = iarg;
657 check = 1;
658 break;
659 }
660 }
661 if (!check) {
662 data->error(PSI_WARNING, "Unknown value '$%s' of `let` statement"
663 " for variable '%s' of implementation '%s'",
664 let->val->var->name, let->var->name, impl->func->name);
665 return 0;
666 }
667 }
668 }
669 return 1;
670 }
671 static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
672 size_t i, j, k;
673 /* we can have any count of set stmts; processing out vars */
674 /* check that set stmts reference known variables */
675 for (i = 0; i < impl->stmts->set.count; ++i) {
676 set_stmt *set = impl->stmts->set.list[i];
677 int check = 0;
678
679 if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
680 impl_arg *iarg = impl->func->args->args[j];
681
682 if (!strcmp(set->var->name, iarg->var->name)) {
683 set->arg = iarg;
684 check = 1;
685 break;
686 }
687 }
688 if (!check) {
689 data->error(PSI_WARNING, "Unknown variable '$%s' of `set` statement"
690 " of implementation '%s'",
691 set->var->name, impl->func->name);
692 return 0;
693 }
694
695 for (j = 0; j < set->val->vars->count; ++j) {
696 decl_var *set_var = set->val->vars->vars[j];
697
698 check = 0;
699 if (impl->decl->args) for (k = 0; k < impl->decl->args->count; ++k) {
700 decl_arg *set_arg = impl->decl->args->args[k];
701
702 if (!strcmp(set_var->name, set_arg->var->name)) {
703 check = 1;
704 set_var->arg = set_arg;
705 if (!validate_set_value(data, set->val, set_arg, impl->decl->args)) {
706 return 0;
707 }
708 break;
709 }
710 }
711
712 if (!check) {
713 data->error(PSI_WARNING, "Unknown value '%s' of `set` statement"
714 " for variable '$%s' of implementation '%s'",
715 set_var->name, set->arg->var->name, impl->func->name);
716 return 0;
717 }
718 }
719 }
720 return 1;
721 }
722 static inline decl *locate_free_decl(decls *decls, free_call *f) {
723 if (decls) {
724 size_t i;
725
726 for (i = 0; i < decls->count; ++i) {
727 if (!strcmp(decls->list[i]->func->var->name, f->func)) {
728 f->decl = decls->list[i];
729 return decls->list[i];
730 }
731 }
732 }
733
734 return NULL;
735 }
736 static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
737 size_t i, j, k, l;
738 /* we can have any count of free stmts; freeing any out vars */
739 for (i = 0; i < impl->stmts->fre.count; ++i) {
740 free_stmt *fre = impl->stmts->fre.list[i];
741
742 for (j = 0; j < fre->calls->count; ++j) {
743 free_call *free_call = fre->calls->list[j];
744
745 /* first find the decl of the free func */
746 if (!locate_free_decl(data->decls, free_call)) {
747 data->error(PSI_WARNING, "Unknown function '%s' in `free` statement"
748 " of implementation '%s'", free_call->func, impl->func->name);
749 return 0;
750 }
751 if (!impl->decl->args) {
752 data->error(PSI_WARNING, "Declaration '%s' of implementation '%s'"
753 " does not have any arguments to free",
754 impl->decl->func->var->name, impl->func->name);
755 }
756
757 /* now check for known vars */
758 for (l = 0; l < free_call->vars->count; ++l) {
759 int check = 0;
760 decl_var *free_var = free_call->vars->vars[l];
761
762 for (k = 0; k < impl->decl->args->count; ++k) {
763 decl_arg *free_arg = impl->decl->args->args[k];
764
765 if (!strcmp(free_var->name, free_arg->var->name)) {
766 check = 1;
767 free_var->arg = free_arg;
768 break;
769 }
770 }
771
772 if (!check) {
773 data->error(PSI_WARNING, "Unknown variable '%s' of `free` statement"
774 " of implementation '%s'",
775 free_var->name, impl->func->name);
776 return 0;
777 }
778 }
779 }
780 }
781 return 1;
782 }
783 static inline int validate_impl_stmts(PSI_Data *data, impl *impl) {
784 if (!impl->stmts) {
785 data->error(PSI_WARNING, "Missing body for implementation %s!",
786 impl->func->name);
787 return 0;
788 }
789
790 if (!validate_impl_ret_stmt(data, impl)) {
791 return 0;
792 }
793
794 if (!validate_impl_let_stmts(data, impl)) {
795 return 0;
796 }
797 if (!validate_impl_set_stmts(data, impl)) {
798 return 0;
799 }
800 if (!validate_impl_free_stmts(data, impl)) {
801 return 0;
802 }
803
804 return 1;
805 }
806
807 PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErrorFunc error)
808 {
809 size_t i;
810 PSI_Data T;
811 struct psi_predef_type *predef_type;
812 struct psi_predef_const *predef_const;
813 struct psi_predef_struct *predef_struct;
814 struct psi_predef_decl *predef_decl;
815
816 if (!C) {
817 C = malloc(sizeof(*C));
818 }
819 memset(C, 0, sizeof(*C));
820
821 C->error = error;
822 C->ops = ops;
823
824 if (ops->init) {
825 ops->init(C);
826 }
827
828 ZEND_ASSERT(ops->call != NULL);
829 ZEND_ASSERT(ops->compile != NULL);
830
831 /* build up predefs in a temporary PSI_Data for validation */
832 memset(&T, 0, sizeof(T));
833 T.error = error;
834
835 for (predef_type = &psi_predef_types[0]; predef_type->type_tag; ++predef_type) {
836 decl_type *type = init_decl_type(predef_type->type_tag, predef_type->type_name);
837 decl_typedef *def = init_decl_typedef(predef_type->alias, type);
838
839 T.defs = add_decl_typedef(T.defs, def);
840 }
841 for (predef_const = &psi_predef_consts[0]; predef_const->type_tag; ++predef_const) {
842 impl_def_val *val = init_impl_def_val(predef_const->val_type_tag, predef_const->val_text);
843 const_type *type = init_const_type(predef_const->type_tag, predef_const->type_name);
844 constant *constant = init_constant(type, predef_const->var_name, val);
845
846 T.consts = add_constant(T.consts, constant);
847 }
848 for (predef_struct = &psi_predef_structs[0]; predef_struct->type_tag; ++predef_struct) {
849 struct psi_predef_struct *member;
850 decl_args *dargs = init_decl_args(NULL);
851 decl_struct *dstruct = init_decl_struct(predef_struct->var_name, dargs);
852
853 dstruct->size = predef_struct->size;
854 for (member = &predef_struct[1]; member->type_tag; ++member) {
855 decl_type *type;
856 decl_var *dvar;
857 decl_arg *darg;
858
859 type = init_decl_type(member->type_tag, member->type_name);
860 dvar = init_decl_var(member->var_name, member->pointer_level, member->array_size);
861 darg = init_decl_arg(type, dvar);
862 darg->layout = init_decl_struct_layout(member->offset, member->size);
863 dargs = add_decl_arg(dargs, darg);
864 }
865
866 T.structs = add_decl_struct(T.structs, dstruct);
867 predef_struct = member;
868 }
869 for (predef_decl = &psi_predef_decls[0]; predef_decl->type_tag; ++predef_decl) {
870 struct psi_predef_decl *farg;
871 decl_type *ftype = init_decl_type(predef_decl->type_tag, predef_decl->type_name);
872 decl_var *fname = init_decl_var(predef_decl->var_name, predef_decl->pointer_level, predef_decl->array_size);
873 decl_arg *func = init_decl_arg(ftype, fname);
874 decl_args *args = init_decl_args(NULL);
875 decl *decl = init_decl(init_decl_abi("default"), func, args);
876
877
878 for (farg = &predef_decl[1]; farg->type_tag; ++farg) {
879 decl_type *arg_type = init_decl_type(farg->type_tag, farg->type_name);
880 decl_var *arg_var = init_decl_var(farg->var_name, farg->pointer_level, farg->array_size);
881 decl_arg *darg = init_decl_arg(arg_type, arg_var);
882 args = add_decl_arg(args, darg);
883 }
884
885 T.decls = add_decl(T.decls, decl);
886 predef_decl = farg;
887 }
888
889 for (i = 0; i < T.defs->count; ++i) {
890 decl_typedef *def = T.defs->list[i];
891
892 if (validate_decl_typedef(&T, def)) {
893 C->defs = add_decl_typedef(C->defs, def);
894 }
895 }
896
897 for (i = 0; i < T.consts->count; ++i) {
898 constant *constant = T.consts->list[i];
899
900 if (validate_constant(&T, constant)) {
901 C->consts = add_constant(C->consts, constant);
902 }
903 }
904
905 for (i = 0; i < T.structs->count; ++i) {
906 decl_struct *dstruct = T.structs->list[i];
907
908 if (validate_decl_struct(&T, dstruct)) {
909 C->structs = add_decl_struct(C->structs, dstruct);
910 }
911 }
912
913 for (i = 0; i < T.decls->count; ++i) {
914 decl *decl = T.decls->list[i];
915
916 if (validate_decl(&T, NULL, decl)) {
917 C->decls = add_decl(C->decls, decl);
918 }
919 }
920
921 C->count = 1;
922 C->data = malloc(sizeof(*C->data));
923 PSI_DataExchange(C->data, &T);
924
925 return C;
926 }
927
928 int PSI_ContextValidate(PSI_Context *C, PSI_Parser *P)
929 {
930 PSI_Data *D;
931 void *dlopened = NULL;
932 size_t count = C->count++;
933
934 C->data = realloc(C->data, C->count * sizeof(*C->data));
935 D = PSI_DataExchange(&C->data[count], PSI_DATA(P));
936
937 if (D->defs) {
938 size_t i;
939
940 for (i = 0; i < D->defs->count; ++i) {
941 if (validate_decl_typedef(PSI_DATA(C), D->defs->list[i])) {
942 C->defs = add_decl_typedef(C->defs, D->defs->list[i]);
943 }
944 }
945 }
946 if (D->structs) {
947 size_t i;
948
949 for (i = 0; i < D->structs->count; ++i) {
950 if (validate_decl_struct(PSI_DATA(C), D->structs->list[i])) {
951 C->structs = add_decl_struct(C->structs, D->structs->list[i]);
952 }
953 }
954 }
955 if (D->consts) {
956 size_t i;
957
958 for (i = 0; i < D->consts->count; ++i) {
959 if (validate_constant(PSI_DATA(C), D->consts->list[i])) {
960 C->consts = add_constant(C->consts, D->consts->list[i]);
961 }
962 }
963 }
964
965 if (!validate_lib(D, &dlopened)) {
966 return 0;
967 }
968
969 add_decl_lib(&C->psi.libs, dlopened);
970
971 if (D->decls) {
972 size_t i;
973
974 for (i = 0; i < D->decls->count; ++i) {
975 if (validate_decl(PSI_DATA(C), dlopened, D->decls->list[i])) {
976 C->decls = add_decl(C->decls, D->decls->list[i]);
977 }
978 }
979 }
980 if (D->impls) {
981 size_t i;
982
983 for (i = 0; i < D->impls->count; ++i) {
984 if (validate_impl_stmts(PSI_DATA(C), D->impls->list[i])) {
985 C->impls = add_impl(C->impls, D->impls->list[i]);
986 }
987 }
988 }
989
990 return 1;
991 }
992
993 static int psi_select_dirent(const struct dirent *entry)
994 {
995 #ifndef FNM_CASEFOLD
996 #define FNM_CASEFOLD 0
997 #endif
998 return 0 == fnmatch("*.psi", entry->d_name, FNM_CASEFOLD);
999 }
1000
1001 void PSI_ContextBuild(PSI_Context *C, const char *paths)
1002 {
1003 int i, n, flags = psi_check_env("PSI_DEBUG") ? PSI_PARSER_DEBUG : 0;
1004 char *sep = NULL, *cpy = strdup(paths), *ptr = cpy;
1005 struct dirent **entries = NULL;
1006
1007
1008 do {
1009 sep = strchr(ptr, ':');
1010
1011 if (sep) {
1012 *sep = 0;
1013 }
1014
1015 n = php_scandir(ptr, &entries, psi_select_dirent, alphasort);
1016
1017 if (n > 0) {
1018 for (i = 0; i < n; ++i) {
1019 char psi[MAXPATHLEN];
1020 PSI_Parser P;
1021
1022 if (MAXPATHLEN <= slprintf(psi, MAXPATHLEN, "%s/%s", ptr, entries[i]->d_name)) {
1023 C->error(PSI_WARNING, "Path to PSI file too long: %s/%s",
1024 ptr, entries[i]->d_name);
1025 }
1026 if (!PSI_ParserInit(&P, psi, C->error, flags)) {
1027 C->error(PSI_WARNING, "Failed to init PSI parser (%s): %s",
1028 psi, strerror(errno));
1029 continue;
1030 }
1031
1032 while (0 < PSI_ParserScan(&P)) {
1033 PSI_ParserParse(&P, PSI_TokenAlloc(&P));
1034 if (P.num == PSI_T_EOF) {
1035 break;
1036 }
1037 }
1038
1039 PSI_ParserParse(&P, NULL);
1040 PSI_ContextValidate(C, &P);
1041 PSI_ParserDtor(&P);
1042 }
1043 }
1044
1045 if (entries) {
1046 for (i = 0; i < n; ++i) {
1047 free(entries[i]);
1048 }
1049 free(entries);
1050 }
1051
1052 ptr = sep + 1;
1053 } while (sep);
1054
1055
1056 if (PSI_ContextCompile(C) && SUCCESS != zend_register_functions(NULL, C->closures, NULL, MODULE_PERSISTENT)) {
1057 C->error(PSI_WARNING, "Failed to register functions!");
1058 }
1059
1060 free(cpy);
1061
1062 }
1063
1064 zend_function_entry *PSI_ContextCompile(PSI_Context *C)
1065 {
1066 size_t i;
1067
1068 if (C->consts) {
1069 zend_constant zc;
1070
1071 zc.flags = CONST_PERSISTENT|CONST_CS;
1072 zc.module_number = EG(current_module)->module_number;
1073
1074 for (i = 0; i < C->consts->count; ++i) {
1075 constant *c = C->consts->list[i];
1076
1077 zc.name = zend_string_init(c->name + (c->name[0] == '\\'), strlen(c->name) - (c->name[0] == '\\'), 1);
1078 ZVAL_NEW_STR(&zc.value, zend_string_init(c->val->text, strlen(c->val->text), 1));
1079
1080 switch (c->type->type) {
1081 case PSI_T_BOOL:
1082 convert_to_boolean(&zc.value);
1083 break;
1084 case PSI_T_INT:
1085 convert_to_long(&zc.value);
1086 break;
1087 case PSI_T_FLOAT:
1088 convert_to_double(&zc.value);
1089 break;
1090 }
1091 zend_register_constant(&zc);
1092 }
1093 }
1094
1095 return C->closures = C->ops->compile(C);
1096 }
1097
1098
1099 void PSI_ContextCall(PSI_Context *C, impl_val *ret_val, decl *decl)
1100 {
1101 errno = 0;
1102 C->ops->call(C, ret_val, decl);
1103 }
1104
1105 static inline void dump_decl_type(int fd, decl_type *t) {
1106 const char *pre;
1107
1108 switch (t->type) {
1109 case PSI_T_STRUCT:
1110 pre = "struct ";
1111 break;
1112 default:
1113 pre = "";
1114 }
1115 dprintf(fd, "%s%s", pre, t->name);
1116 }
1117 static inline void dump_decl_var(int fd, decl_var *v) {
1118 dprintf(fd, "%.*s%s", v->pointer_level-!!v->array_size, "**********", v->name);
1119 if (v->array_size) {
1120 dprintf(fd, "[%u]", v->array_size);
1121 }
1122 }
1123 static inline void dump_decl_arg(int fd, decl_arg *a) {
1124 dump_decl_type(fd, a->type);
1125 dprintf(fd, " ");
1126 dump_decl_var(fd, a->var);
1127 }
1128 static inline void dump_level(int fd, unsigned level) {
1129 dprintf(fd, "%.*s", level, "\t\t\t\t\t\t\t\t\t");
1130 }
1131 static inline void dump_impl_set_value(int fd, set_value *set, unsigned level) {
1132 size_t i;
1133
1134 if (level > 1) {
1135 /* only if not directly after `set ...` */
1136 dump_level(fd, level);
1137 }
1138 dprintf(fd, "%s(", set->func->name);
1139
1140 for (i = 0; i < set->vars->count; ++i) {
1141 decl_var *svar = set->vars->vars[i];
1142 if (i) {
1143 dprintf(fd, ", ");
1144 }
1145 dump_decl_var(fd, svar);
1146 }
1147 if (set->inner) {
1148 dprintf(fd, ",\n");
1149 for (i = 0; i < set->count; ++i) {
1150 dump_impl_set_value(fd, set->inner[i], level+1);
1151 }
1152 /* only if inner stmts, i.e. with new lines, were dumped */
1153 dump_level(fd, level);
1154 }
1155 if (level > 1) {
1156 dprintf(fd, "),\n");
1157 } else {
1158 dprintf(fd, ");\n");
1159 }
1160 }
1161 static inline void dump_num_exp(int fd, num_exp *exp) {
1162 switch (exp->t) {
1163 case PSI_T_NUMBER:
1164 dprintf(fd, "%s", exp->u.numb);
1165 break;
1166 case PSI_T_NAME:
1167 dump_decl_var(fd, exp->u.dvar);
1168 break;
1169 case PSI_T_NSNAME:
1170 dprintf(fd, "%s", exp->u.cnst->name);
1171 break;
1172 EMPTY_SWITCH_DEFAULT_CASE();
1173 }
1174 }
1175 void PSI_ContextDump(PSI_Context *C, int fd)
1176 {
1177 size_t i, j, k, l;
1178
1179 #ifdef HAVE_LIBJIT
1180 if (C->ops == PSI_Libjit()) {
1181 dprintf(fd, "// psi.engine=jit\n");
1182 }
1183 #endif
1184 #ifdef HAVE_LIBFFI
1185 if (C->ops == PSI_Libffi()) {
1186 dprintf(fd, "// psi.engine=ffi\n");
1187 }
1188 #endif
1189 dprintf(fd, "\n");
1190
1191 if (C->defs) {
1192 for (i = 0; i < C->defs->count; ++i) {
1193 decl_typedef *tdef = C->defs->list[i];
1194
1195 dprintf(fd, "typedef ");
1196 dump_decl_type(fd, tdef->type);
1197 dprintf(fd, " %s;\n", tdef->alias);
1198 }
1199 dprintf(fd, "\n");
1200 }
1201
1202 if (C->structs) {
1203 for (i = 0; i < C->structs->count; ++i) {
1204 decl_struct *strct = C->structs->list[i];
1205
1206 dprintf(fd, "struct %s::(%zu) {\n", strct->name, strct->size);
1207 if (strct->args) for (j = 0; j < strct->args->count; ++j) {
1208 decl_arg *sarg = strct->args->args[j];
1209
1210 dprintf(fd, "\t");
1211 dump_decl_arg(fd, sarg);
1212 dprintf(fd, "::(%zu, %zu);\n", sarg->layout->pos, sarg->layout->len);
1213 }
1214 dprintf(fd, "}\n");
1215 }
1216 dprintf(fd, "\n");
1217 }
1218 if (C->consts) {
1219 for (i = 0; i < C->consts->count; ++i) {
1220 constant *cnst = C->consts->list[i];
1221
1222 dprintf(fd, "const %s %s = ", cnst->type->name, cnst->name);
1223 if (cnst->val->type == PSI_T_QUOTED_STRING) {
1224 dprintf(fd, "\"%s\";\n", cnst->val->text);
1225 } else {
1226 dprintf(fd, "%s;\n", cnst->val->text);
1227 }
1228 }
1229 dprintf(fd, "\n");
1230 }
1231 if (C->decls) {
1232 for (i = 0; i < C->decls->count; ++i) {
1233 decl *decl = C->decls->list[i];
1234
1235 dprintf(fd, "%s ", decl->abi->convention);
1236 dump_decl_arg(fd, decl->func);
1237 dprintf(fd, "(");
1238 if (decl->args) for (j = 0; j < decl->args->count; ++j) {
1239 if (j) {
1240 dprintf(fd, ", ");
1241 }
1242 dump_decl_arg(fd, decl->args->args[j]);
1243 }
1244 dprintf(fd, ");\n");
1245 }
1246 dprintf(fd, "\n");
1247 }
1248 if (C->impls) {
1249 for (i = 0; i < C->impls->count; ++i) {
1250 impl *impl = C->impls->list[i];
1251
1252 dprintf(fd, "function %s(", impl->func->name);
1253 if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
1254 impl_arg *iarg = impl->func->args->args[j];
1255
1256 dprintf(fd, "%s%s %s$%s",
1257 j ? ", " : "",
1258 iarg->type->name,
1259 iarg->var->reference ? "&" : "",
1260 iarg->var->name);
1261 if (iarg->def) {
1262 dprintf(fd, " = %s", iarg->def->text);
1263 }
1264 }
1265 dprintf(fd, ") : %s%s {\n",
1266 impl->func->return_reference ? "&":"",
1267 impl->func->return_type->name);
1268 if (impl->stmts) {
1269 for (j = 0; j < impl->stmts->let.count; ++j) {
1270 let_stmt *let = impl->stmts->let.list[j];
1271
1272 dprintf(fd, "\tlet %s", let->var->name);
1273 if (let->val) {
1274 dprintf(fd, " = %s", let->val->is_reference ? "&" : "");
1275 if (let->val->func) {
1276 dprintf(fd, "%s(", let->val->func->name);
1277 if (let->val->func->alloc) {
1278 dump_num_exp(fd, let->val->func->alloc->nmemb);
1279 dprintf(fd, ", ");
1280 dump_num_exp(fd, let->val->func->alloc->size);
1281 } else {
1282 dprintf(fd, "$%s", let->val->var->name);
1283 }
1284 dprintf(fd, ");\n");
1285 } else {
1286 dprintf(fd, "NULL;\n");
1287 }
1288 }
1289 }
1290 for (j = 0; j < impl->stmts->ret.count; ++j) {
1291 return_stmt *ret = impl->stmts->ret.list[j];
1292
1293 dprintf(fd, "\treturn ");
1294 dump_impl_set_value(fd, ret->set, 1);
1295 }
1296 for (j = 0; j < impl->stmts->set.count; ++j) {
1297 set_stmt *set = impl->stmts->set.list[j];
1298
1299 dprintf(fd, "\tset $%s = ", set->var->name);
1300 dump_impl_set_value(fd, set->val, 1);
1301 }
1302 for (j = 0; j < impl->stmts->fre.count; ++j) {
1303 free_stmt *fre = impl->stmts->fre.list[j];
1304
1305 dprintf(fd, "\tfree ");
1306 for (k = 0; k < fre->calls->count; ++k) {
1307 free_call *call = fre->calls->list[k];
1308
1309 if (k) {
1310 dprintf(fd, ", ");
1311 }
1312 dprintf(fd, "%s(", call->func);
1313 for (l = 0; l < call->vars->count; ++l) {
1314 decl_var *fvar = call->vars->vars[l];
1315
1316 dump_decl_var(fd, fvar);
1317 }
1318 dprintf(fd, ");\n");
1319 }
1320 }
1321 }
1322 dprintf(fd, "}\n");
1323 }
1324 dprintf(fd, "\n");
1325 }
1326 }
1327
1328 void PSI_ContextDtor(PSI_Context *C)
1329 {
1330 size_t i;
1331 zend_function_entry *zfe;
1332
1333 if (C->ops->dtor) {
1334 C->ops->dtor(C);
1335 }
1336
1337 free_decl_libs(&C->psi.libs);
1338
1339 if (C->data) {
1340 for (i = 0; i < C->count; ++i) {
1341 PSI_DataDtor(&C->data[i]);
1342 }
1343 free(C->data);
1344 }
1345
1346 if (C->closures) {
1347 for (zfe = C->closures; zfe->fname; ++zfe) {
1348 free((void *) zfe->arg_info);
1349 }
1350 free(C->closures);
1351 }
1352
1353 if (C->consts) {
1354 if (C->consts->list) {
1355 free(C->consts->list);
1356 }
1357 free(C->consts);
1358 }
1359 if (C->defs) {
1360 if (C->defs->list) {
1361 free(C->defs->list);
1362 }
1363 free(C->defs);
1364 }
1365 if (C->structs) {
1366 if (C->structs->list) {
1367 free(C->structs->list);
1368 }
1369 free(C->structs);
1370 }
1371 if (C->decls) {
1372 if (C->decls->list) {
1373 free(C->decls->list);
1374 }
1375 free(C->decls);
1376 }
1377 if (C->impls) {
1378 if (C->impls->list) {
1379 free(C->impls->list);
1380 }
1381 free(C->impls);
1382 }
1383
1384 memset(C, 0, sizeof(*C));
1385 }
1386
1387 void PSI_ContextFree(PSI_Context **C)
1388 {
1389 if (*C) {
1390 PSI_ContextDtor(*C);
1391 free(*C);
1392 *C = NULL;
1393 }
1394 }
PHP System Interface / POSIX Standard Interface