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709c6b4a6d3c8a73ac6cf032ab19ccb45c17a9fa
[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 int psi_glob(const char *pattern, int flags,
154 int (*errfunc) (const char *epath, int eerrno),
155 glob_t *pglob) {
156 size_t offs = flags & GLOB_DOOFFS ? pglob->gl_offs : 0;
157 int rv = glob(pattern, flags, errfunc, pglob);
158 if (pglob->gl_pathv) {
159 while (offs--) {
160 pglob->gl_pathv[offs] = NULL;
161 }
162 }
163 return rv;
164 }
165
166 static struct psi_func_redir {
167 const char *name;
168 void (*func)(void);
169 } psi_func_redirs[] = {
170 {"glob", (void (*)(void)) psi_glob},
171 PSI_REDIRS
172 {0}
173 };
174
175 static struct psi_predef_decl {
176 token_t type_tag;
177 const char *type_name;
178 const char *var_name;
179 size_t pointer_level;
180 size_t array_size;
181 } psi_predef_decls[] = {
182 PSI_DECLS
183 {0}
184 };
185
186 static struct psi_predef_struct {
187 token_t type_tag;
188 const char *type_name;
189 const char *var_name;
190 size_t offset;
191 size_t size;
192 size_t pointer_level;
193 size_t array_size;
194 } psi_predef_structs[] = {
195 PSI_STRUCTS
196 {0}
197 };
198
199 static int validate_lib(PSI_Data *data, void **dlopened) {
200 char lib[MAXPATHLEN];
201 const char *ptr = data->psi.file.ln;
202 size_t len;
203
204 if (!ptr) {
205 /* FIXME: assume stdlib */
206 return 1;
207 } else if (!strchr(ptr, '/')) {
208 len = snprintf(lib, MAXPATHLEN, "lib%s.%s", ptr, PHP_PSI_SHLIB_SUFFIX);
209 if (MAXPATHLEN == len) {
210 data->error(PSI_WARNING, "Library name too long: '%s'", ptr);
211 }
212 lib[len] = 0;
213 ptr = lib;
214 }
215 if (!(*dlopened = dlopen(ptr, RTLD_LAZY|RTLD_LOCAL))) {
216 data->error(PSI_WARNING, "Could not open library '%s': %s.",
217 data->psi.file.ln, dlerror());
218 return 0;
219 }
220 return 1;
221 }
222
223 static inline int locate_decl_type_alias(decl_typedefs *defs, decl_type *type) {
224 size_t i;
225 struct psi_std_type *stdtyp;
226
227 if (type->real) {
228 return 1;
229 }
230 for (i = 0; i < defs->count; ++i) {
231 decl_typedef *def = defs->list[i];
232
233 if (def->type->type != type->type && !strcmp(def->alias, type->name)) {
234 type->real = def->type;
235 return 1;
236 }
237 }
238 for (stdtyp = &psi_std_types[0]; stdtyp->type_tag; ++stdtyp) {
239 if (!strcmp(type->name, stdtyp->type_name)) {
240 type->type = stdtyp->type_tag;
241 return 1;
242 }
243 }
244
245 return 0;
246 }
247 static inline int locate_decl_type_struct(decl_structs *structs, decl_type *type) {
248 size_t i;
249
250 if (type->strct) {
251 return 1;
252 }
253 for (i = 0; i < structs->count; ++i) {
254 if (!strcmp(structs->list[i]->name, type->name)) {
255 type->strct = structs->list[i];
256 return 1;
257 }
258 }
259 return 0;
260 }
261
262 static inline int validate_decl_type(PSI_Data *data, decl_type *type) {
263 switch (type->type) {
264 case PSI_T_NAME:
265 if (!data->defs || !locate_decl_type_alias(data->defs, type)) {
266 return 0;
267 }
268 if (type->real) {
269 return validate_decl_type(data, type->real);
270 }
271 return 1;
272 case PSI_T_STRUCT:
273 if (!data->structs || !locate_decl_type_struct(data->structs, type)) {
274 return 0;
275 }
276 break;
277 }
278 return 1;
279 }
280 static inline int validate_decl_typedef(PSI_Data *data, decl_typedef *def) {
281 if (!validate_decl_type(data, def->type)) {
282 data->error(PSI_WARNING, "Type '%s' cannot be aliased to %s'%s'",
283 def->type->name, def->type->type == PSI_T_STRUCT?"struct ":"",def->alias);
284 return 0;
285 }
286 /* FIXME: check def->alias */
287 return 1;
288 }
289
290 static inline int validate_constant(PSI_Data *data, constant *c) {
291 /* FIXME */
292 return 1;
293 }
294
295 static inline int validate_decl_arg(PSI_Data *data, decl_arg *arg) {
296 if (!validate_decl_type(data, arg->type)) {
297 data->error(PSI_WARNING, "Cannot use '%s'(%d) as type for '%s'",
298 arg->type->name, arg->type->type, arg->var->name);
299 return 0;
300 }
301 return 1;
302 }
303
304 static inline int validate_decl_struct(PSI_Data *data, decl_struct *s) {
305 size_t i;
306
307 for (i = 0; i < s->args->count; ++i) {
308 if (!validate_decl_arg(data, s->args->args[i])) {
309 return 0;
310 }
311 }
312
313 for (i = 0; i < s->args->count; ++i) {
314 decl_arg *darg = s->args->args[i];
315
316 if (!validate_decl_arg(data, darg)) {
317 return 0;
318 }
319
320 ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
321 darg->var->arg = darg;
322
323 if (!darg->layout) {
324 token_t t;
325
326 if (darg->var->pointer_level && (!darg->var->array_size || darg->var->pointer_level == 1)) {
327 t = PSI_T_POINTER;
328 } else {
329 t = real_decl_type(darg->type)->type;
330 }
331
332 if (i) {
333 decl_arg *last = s->args->args[i-1];
334 darg->layout = init_decl_struct_layout(
335 psi_t_align(t, last->layout->pos + last->layout->len),
336 psi_t_size(t) * darg->var->array_size);
337 } else {
338 darg->layout = init_decl_struct_layout(0, psi_t_size(t));
339 }
340 }
341 if (s->size < darg->layout->pos + darg->layout->len) {
342 s->size = darg->layout->pos + darg->layout->len;
343 }
344 }
345 return 1;
346 }
347
348 static const char * const abi_ccs[] = {
349 "default", /* \ */
350 "extern", /* > - all the same */
351 "cdecl", /* / */
352 "stdcall",
353 "fastcall",
354 };
355 static inline int validate_decl_abi(PSI_Data *data, decl_abi *abi) {
356 size_t i;
357
358 for (i = 0; i < sizeof(abi_ccs)/sizeof(char*); ++i) {
359 if (strcasecmp(abi->convention, abi_ccs[i])) {
360 return 1;
361 }
362 }
363 data->error(PSI_WARNING, "Invalid calling convention: '%s'", abi->convention);
364 return 0;
365 }
366 static inline int validate_decl_func(PSI_Data *data, void *dl, decl *decl, decl_arg *func)
367 {
368 struct psi_func_redir *redir;
369
370 if (!strcmp(func->var->name, "dlsym")) {
371 data->error(PSI_WARNING, "Cannot dlsym dlsym (sic!)");
372 return 0;
373 }
374
375 if (!validate_decl_arg(data, func)) {
376 return 0;
377 }
378 for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
379 if (!strcmp(func->var->name, redir->name)) {
380 decl->call.sym = redir->func;
381 }
382 }
383 if (!decl->call.sym) {
384 #ifndef RTLD_NEXT
385 # define RTLD_NEXT ((void *) -1l)
386 #endif
387 decl->call.sym = dlsym(dl ?: RTLD_NEXT, func->var->name);
388 if (!decl->call.sym) {
389 data->error(PSI_WARNING, "Failed to locate symbol '%s': %s",
390 func->var->name, dlerror());
391 }
392 }
393 return 1;
394 }
395
396 static inline int validate_decl(PSI_Data *data, void *dl, decl *decl) {
397 if (!validate_decl_abi(data, decl->abi)) {
398 return 0;
399 }
400 if (!validate_decl_func(data, dl, decl, decl->func)) {
401 return 0;
402 }
403 if (decl->args) {
404 size_t i;
405
406 for (i = 0; i < decl->args->count; ++i) {
407 if (!validate_decl_arg(data, decl->args->args[i])) {
408 return 0;
409 }
410 }
411 }
412 return 1;
413 }
414 static inline decl_arg *locate_decl_var_arg(decl_var *var, decl_args *args, decl_arg *func) {
415 size_t i;
416
417 for (i = 0; i < args->count; ++i) {
418 decl_arg *arg = args->args[i];
419
420 if (!strcmp(var->name, arg->var->name)) {
421 ZEND_ASSERT(!var->arg || var->arg == arg);
422 return var->arg = arg;
423 }
424 }
425 if (func && !strcmp(var->name, func->var->name)) {
426 return var->arg = func;
427 }
428
429 return NULL;
430 }
431 static inline decl_arg *locate_struct_member(decl_struct *s, decl_var *var) {
432 if (s->args) {
433 return locate_decl_var_arg(var, s->args, NULL);
434 }
435
436 return NULL;
437 }
438 static inline constant *locate_num_exp_constant(num_exp *exp, constants *consts) {
439 size_t i;
440
441 for (i = 0; i < consts->count; ++i) {
442 constant *cnst = consts->list[i];
443
444 if (!strcmp(cnst->name, exp->u.numb)) {
445 free(exp->u.numb);
446 return exp->u.cnst = cnst;
447 }
448 }
449
450 return NULL;
451 }
452 static inline int validate_num_exp(PSI_Data *data, decl_args *dargs, decl_arg *func, num_exp *exp) {
453 if (exp->operand) {
454 switch (exp->operator) {
455 case PSI_T_PLUS:
456 exp->calculator = psi_calc_add;
457 break;
458 case PSI_T_MINUS:
459 exp->calculator = psi_calc_sub;
460 break;
461 case PSI_T_ASTERISK:
462 exp->calculator = psi_calc_mul;
463 break;
464 case PSI_T_SLASH:
465 exp->calculator = psi_calc_div;
466 break;
467 EMPTY_SWITCH_DEFAULT_CASE();
468 }
469 if (!validate_num_exp(data, dargs, func, exp->operand)) {
470 return 0;
471 }
472 }
473 switch (exp->t) {
474 case PSI_T_NAME:
475 if (!locate_decl_var_arg(exp->u.dvar, dargs, func)) {
476 data->error(PSI_WARNING, "Unknown variable '%s' in numeric expression",
477 exp->u.dvar->name);
478 return 0;
479 }
480 return 1;
481 case PSI_T_NSNAME:
482 if (!locate_num_exp_constant(exp, data->consts)) {
483 data->error(PSI_WARNING, "Unknown constant '%s' in numeric expression",
484 exp->u.numb);
485 return 0;
486 }
487 return 1;
488 case PSI_T_NUMBER:
489 return 1;
490 default:
491 return 0;
492 }
493 }
494 static inline int validate_set_value_handler(set_value *set) {
495 switch (set->func->type) {
496 case PSI_T_TO_BOOL:
497 set->func->handler = psi_to_bool;
498 break;
499 case PSI_T_TO_INT:
500 set->func->handler = psi_to_int;
501 break;
502 case PSI_T_TO_FLOAT:
503 set->func->handler = psi_to_double;
504 break;
505 case PSI_T_TO_STRING:
506 set->func->handler = psi_to_string;
507 break;
508 case PSI_T_TO_ARRAY:
509 set->func->handler = psi_to_array;
510 break;
511 case PSI_T_TO_OBJECT:
512 set->func->handler = psi_to_object;
513 break;
514 case PSI_T_VOID:
515 set->func->handler = psi_to_void;
516 break;
517 default:
518 return 0;
519 }
520 return 1;
521 }
522 static inline void decl_var_arg_v(decl_args *args, va_list argp) {
523 int argc;
524 decl_arg **argv;
525
526 memset(args, 0, sizeof(*args));
527
528 while ((argc = va_arg(argp, int))) {
529 argv = va_arg(argp, decl_arg **);
530 while (argc--) {
531 add_decl_arg(args, *argv++);
532 }
533 }
534 }
535 static inline int validate_set_value_ex(PSI_Data *data, set_value *set, decl_arg *ref, decl_args *ref_list) {
536 size_t i;
537 decl_type *ref_type;
538 decl_var *set_var = set->vars->vars[0];
539
540 if (!validate_set_value_handler(set)) {
541 data->error(PSI_WARNING, "Invalid cast '%s'", set->func->name);
542 return 0;
543 }
544
545 for (i = 0; i < set->vars->count; ++i) {
546 if (!locate_decl_var_arg(set->vars->vars[i], ref_list, NULL)) {
547 data->error(PSI_WARNING, "Unknown variable '%s'", set->vars->vars[i]->name);
548 return 0;
549 }
550 }
551
552 if (!ref) {
553 ref = set_var->arg;
554 }
555 ref_type = real_decl_type(ref->type);
556
557 if (set->count) {
558 int is_to_array = (set->func->type == PSI_T_TO_ARRAY);
559 int is_pointer_to_struct = (ref_type->type == PSI_T_STRUCT && ref->var->pointer_level);
560
561 if (!is_to_array && !is_pointer_to_struct) {
562 data->error(E_WARNING, "Inner `set` statement casts only work with "
563 "to_array() casts on structs or pointers: %s(%s...", set->func->name, set->vars->vars[0]->name);
564 return 0;
565 }
566 }
567 if (set->num) {
568 if (!validate_num_exp(data, ref_list, ref, set->num)) {
569 return 0;
570 }
571 }
572
573 if (ref_type->type == PSI_T_STRUCT) {
574 /* to_array(struct, to_...) */
575 for (i = 0; i < set->count; ++i) {
576 decl_var *sub_var = set->inner[i]->vars->vars[0];
577 decl_arg *sub_ref = locate_struct_member(ref_type->strct, sub_var);
578
579 set->inner[i]->outer.set = set;
580 if (sub_ref) {
581 if (!validate_set_value_ex(data, set->inner[i], sub_ref, ref_type->strct->args)) {
582 return 0;
583 }
584 }
585 }
586 } else if (set->count == 1) {
587 /* to_array(ptr, to_string(*ptr)) */
588 decl_var *sub_var = set->inner[0]->vars->vars[0];
589 decl_arg *sub_ref = locate_decl_var_arg(sub_var, ref_list, ref);
590
591 set->inner[0]->outer.set = set;
592 if (sub_ref) {
593 if (strcmp(sub_var->name, set_var->name)) {
594 data->error(E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
595 return 0;
596 }
597 if (!validate_set_value_ex(data, set->inner[0], sub_ref, ref_list)) {
598 return 0;
599 }
600 }
601 } else if (set->count > 1) {
602 data->error(E_WARNING, "Inner `set` statement casts on pointers may only occur once");
603 return 0;
604 }
605
606 return 1;
607 }
608 static inline int validate_set_value(PSI_Data *data, set_value *set, ...) {
609 va_list argp;
610 decl_args args = {0};
611 int check;
612
613 va_start(argp, set);
614 decl_var_arg_v(&args, argp);
615 va_end(argp);
616
617 check = validate_set_value_ex(data, set, NULL, &args);
618 if (args.args) {
619 free(args.args);
620 }
621 return check;
622 }
623 static inline decl *locate_impl_decl(decls *decls, return_stmt *ret) {
624 if (decls) {
625 size_t i;
626
627 for (i = 0; i < decls->count; ++i) {
628 if (!strcmp(decls->list[i]->func->var->name, ret->set->vars->vars[0]->name)) {
629 ret->decl = decls->list[i]->func;
630 return decls->list[i];
631 }
632 }
633 }
634
635 return NULL;
636 }
637 static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
638 return_stmt *ret;
639
640 /* we must have exactly one ret stmt delcaring the native func to call */
641 /* and which type cast to apply */
642 if (impl->stmts->ret.count != 1) {
643 if (impl->stmts->ret.count > 1) {
644 data->error(PSI_WARNING, "Too many `return` statements for implmentation %s;"
645 " found %zu, exactly one is needed",
646 impl->func->name, impl->stmts->ret.count);
647 } else {
648 data->error(PSI_WARNING, "Missing `return` statement for implementation %s",
649 impl->func->name);
650 }
651 return 0;
652 }
653
654 ret = impl->stmts->ret.list[0];
655
656 if (!(impl->decl = locate_impl_decl(data->decls, ret))) {
657 data->error(PSI_WARNING, "Missing declaration for implementation %s",
658 impl->func->name);
659 return 0;
660 }
661
662 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)) {
663 return 0;
664 }
665
666 impl->decl->impl = impl;
667
668 return 1;
669 }
670
671 static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
672 size_t i, j;
673 /* we can have multiple let stmts */
674 /* check that we have a decl arg for every let stmt */
675 for (i = 0; i < impl->stmts->let.count; ++i) {
676 let_stmt *let = impl->stmts->let.list[i];
677
678 if (!locate_decl_var_arg(let->var, impl->decl->args, impl->decl->func)) {
679 data->error(PSI_WARNING, "Unknown variable '%s' in `let` statement"
680 " of implementation '%s'", let->var->name, impl->func->name);
681 return 0;
682 }
683 }
684
685 /* check that we have a let stmt for every decl arg */
686 if (impl->decl->args) for (i = 0; i < impl->decl->args->count; ++i) {
687 decl_arg *darg = impl->decl->args->args[i];
688 int check = 0;
689
690 for (j = 0; j < impl->stmts->let.count; ++j) {
691 let_stmt *let = impl->stmts->let.list[j];
692
693 if (!strcmp(let->var->name, darg->var->name)) {
694 darg->let = let;
695 check = 1;
696 break;
697 }
698 }
699 if (!check) {
700 data->error(PSI_WARNING, "Missing `let` statement for arg '%s %.*s%s'"
701 " of declaration '%s' for implementation '%s'",
702 darg->type->name, (int) darg->var->pointer_level, "*****",
703 darg->var->name, impl->decl->func->var->name, impl->func->name);
704 return 0;
705 }
706 }
707 /* check that the let_value references a known variable or NULL */
708 for (i = 0; i < impl->stmts->let.count; ++i) {
709 let_stmt *let = impl->stmts->let.list[i];
710 int check = 0;
711
712 if (let->val && let->val->func && let->val->func->alloc) {
713 if (!validate_num_exp(data, impl->decl->args, impl->decl->func, let->val->func->alloc->nmemb)) {
714 return 0;
715 }
716 if (!validate_num_exp(data, impl->decl->args, impl->decl->func, let->val->func->alloc->size)) {
717 return 0;
718 }
719 }
720 if (let->val && let->val->var) {
721 if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
722 impl_arg *iarg = impl->func->args->args[j];
723
724 if (!strcmp(let->val->var->name, iarg->var->name)) {
725 let->arg = iarg;
726 check = 1;
727 break;
728 }
729 }
730 if (!check) {
731 data->error(PSI_WARNING, "Unknown value '$%s' of `let` statement"
732 " for variable '%s' of implementation '%s'",
733 let->val->var->name, let->var->name, impl->func->name);
734 return 0;
735 }
736 }
737 if (let->val && let->val->num) {
738 if (!validate_num_exp(data, impl->decl->args, impl->decl->func, let->val->num)) {
739 return 0;
740 }
741 }
742 }
743 return 1;
744 }
745 static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
746 size_t i, j, k;
747 /* we can have any count of set stmts; processing out vars */
748 /* check that set stmts reference known variables */
749 for (i = 0; i < impl->stmts->set.count; ++i) {
750 set_stmt *set = impl->stmts->set.list[i];
751 int check = 0;
752
753 if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
754 impl_arg *iarg = impl->func->args->args[j];
755
756 if (!strcmp(set->var->name, iarg->var->name)) {
757 set->arg = iarg;
758 check = 1;
759 break;
760 }
761 }
762 if (!check) {
763 data->error(PSI_WARNING, "Unknown variable '$%s' of `set` statement"
764 " of implementation '%s'",
765 set->var->name, impl->func->name);
766 return 0;
767 }
768
769 for (j = 0; j < set->val->vars->count; ++j) {
770 decl_var *set_var = set->val->vars->vars[j];
771
772 check = 0;
773 if (impl->decl->args) for (k = 0; k < impl->decl->args->count; ++k) {
774 decl_arg *set_arg = impl->decl->args->args[k];
775
776 if (!strcmp(set_var->name, set_arg->var->name)) {
777 check = 1;
778 set_var->arg = set_arg;
779 if (!validate_set_value(data, set->val, 1, &set_arg, 1, &impl->decl->func, impl->decl->args->count, impl->decl->args->args, 0)) {
780 return 0;
781 }
782 break;
783 }
784 }
785
786 if (!check) {
787 data->error(PSI_WARNING, "Unknown value '%s' of `set` statement"
788 " for variable '$%s' of implementation '%s'",
789 set_var->name, set->arg->var->name, impl->func->name);
790 return 0;
791 }
792 }
793 }
794 return 1;
795 }
796 static inline decl *locate_free_decl(decls *decls, free_call *f) {
797 if (decls) {
798 size_t i;
799
800 for (i = 0; i < decls->count; ++i) {
801 if (!strcmp(decls->list[i]->func->var->name, f->func)) {
802 f->decl = decls->list[i];
803 return decls->list[i];
804 }
805 }
806 }
807
808 return NULL;
809 }
810 static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
811 size_t i, j, k, l;
812 /* we can have any count of free stmts; freeing any out vars */
813 for (i = 0; i < impl->stmts->fre.count; ++i) {
814 free_stmt *fre = impl->stmts->fre.list[i];
815
816 for (j = 0; j < fre->calls->count; ++j) {
817 free_call *free_call = fre->calls->list[j];
818
819 /* first find the decl of the free func */
820 if (!locate_free_decl(data->decls, free_call)) {
821 data->error(PSI_WARNING, "Unknown function '%s' in `free` statement"
822 " of implementation '%s'", free_call->func, impl->func->name);
823 return 0;
824 }
825 if (!impl->decl->args) {
826 data->error(PSI_WARNING, "Declaration '%s' of implementation '%s'"
827 " does not have any arguments to free",
828 impl->decl->func->var->name, impl->func->name);
829 }
830
831 /* now check for known vars */
832 for (l = 0; l < free_call->vars->count; ++l) {
833 int check = 0;
834 decl_var *free_var = free_call->vars->vars[l];
835
836 for (k = 0; k < impl->decl->args->count; ++k) {
837 decl_arg *free_arg = impl->decl->args->args[k];
838
839 if (!strcmp(free_var->name, free_arg->var->name)) {
840 check = 1;
841 free_var->arg = free_arg;
842 break;
843 }
844 }
845
846 if (!check) {
847 data->error(PSI_WARNING, "Unknown variable '%s' of `free` statement"
848 " of implementation '%s'",
849 free_var->name, impl->func->name);
850 return 0;
851 }
852 }
853 }
854 }
855 return 1;
856 }
857 static inline int validate_impl_stmts(PSI_Data *data, impl *impl) {
858 if (!impl->stmts) {
859 data->error(PSI_WARNING, "Missing body for implementation %s!",
860 impl->func->name);
861 return 0;
862 }
863
864 if (!validate_impl_ret_stmt(data, impl)) {
865 return 0;
866 }
867
868 if (!validate_impl_let_stmts(data, impl)) {
869 return 0;
870 }
871 if (!validate_impl_set_stmts(data, impl)) {
872 return 0;
873 }
874 if (!validate_impl_free_stmts(data, impl)) {
875 return 0;
876 }
877
878 return 1;
879 }
880
881 PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErrorFunc error)
882 {
883 size_t i;
884 PSI_Data T;
885 struct psi_predef_type *predef_type;
886 struct psi_predef_const *predef_const;
887 struct psi_predef_struct *predef_struct;
888 struct psi_predef_decl *predef_decl;
889
890 if (!C) {
891 C = malloc(sizeof(*C));
892 }
893 memset(C, 0, sizeof(*C));
894
895 C->error = error;
896 C->ops = ops;
897
898 if (ops->init) {
899 ops->init(C);
900 }
901
902 ZEND_ASSERT(ops->call != NULL);
903 ZEND_ASSERT(ops->compile != NULL);
904
905 /* build up predefs in a temporary PSI_Data for validation */
906 memset(&T, 0, sizeof(T));
907 T.error = error;
908
909 for (predef_type = &psi_predef_types[0]; predef_type->type_tag; ++predef_type) {
910 decl_type *type = init_decl_type(predef_type->type_tag, predef_type->type_name);
911 decl_typedef *def = init_decl_typedef(predef_type->alias, type);
912
913 T.defs = add_decl_typedef(T.defs, def);
914 }
915 for (predef_const = &psi_predef_consts[0]; predef_const->type_tag; ++predef_const) {
916 impl_def_val *val = init_impl_def_val(predef_const->val_type_tag, predef_const->val_text);
917 const_type *type = init_const_type(predef_const->type_tag, predef_const->type_name);
918 constant *constant = init_constant(type, predef_const->var_name, val);
919
920 T.consts = add_constant(T.consts, constant);
921 }
922 for (predef_struct = &psi_predef_structs[0]; predef_struct->type_tag; ++predef_struct) {
923 struct psi_predef_struct *member;
924 decl_args *dargs = init_decl_args(NULL);
925 decl_struct *dstruct = init_decl_struct(predef_struct->var_name, dargs);
926
927 dstruct->size = predef_struct->size;
928 for (member = &predef_struct[1]; member->type_tag; ++member) {
929 decl_type *type;
930 decl_var *dvar;
931 decl_arg *darg;
932
933 type = init_decl_type(member->type_tag, member->type_name);
934 dvar = init_decl_var(member->var_name, member->pointer_level, member->array_size);
935 darg = init_decl_arg(type, dvar);
936 darg->layout = init_decl_struct_layout(member->offset, member->size);
937 dargs = add_decl_arg(dargs, darg);
938 }
939
940 T.structs = add_decl_struct(T.structs, dstruct);
941 predef_struct = member;
942 }
943 for (predef_decl = &psi_predef_decls[0]; predef_decl->type_tag; ++predef_decl) {
944 struct psi_predef_decl *farg;
945 decl_type *ftype = init_decl_type(predef_decl->type_tag, predef_decl->type_name);
946 decl_var *fname = init_decl_var(predef_decl->var_name, predef_decl->pointer_level, predef_decl->array_size);
947 decl_arg *func = init_decl_arg(ftype, fname);
948 decl_args *args = init_decl_args(NULL);
949 decl *decl = init_decl(init_decl_abi("default"), func, args);
950
951
952 for (farg = &predef_decl[1]; farg->type_tag; ++farg) {
953 decl_type *arg_type = init_decl_type(farg->type_tag, farg->type_name);
954 decl_var *arg_var = init_decl_var(farg->var_name, farg->pointer_level, farg->array_size);
955 decl_arg *darg = init_decl_arg(arg_type, arg_var);
956 args = add_decl_arg(args, darg);
957 }
958
959 T.decls = add_decl(T.decls, decl);
960 predef_decl = farg;
961 }
962
963 for (i = 0; i < T.defs->count; ++i) {
964 decl_typedef *def = T.defs->list[i];
965
966 if (validate_decl_typedef(&T, def)) {
967 C->defs = add_decl_typedef(C->defs, def);
968 }
969 }
970
971 for (i = 0; i < T.consts->count; ++i) {
972 constant *constant = T.consts->list[i];
973
974 if (validate_constant(&T, constant)) {
975 C->consts = add_constant(C->consts, constant);
976 }
977 }
978
979 for (i = 0; i < T.structs->count; ++i) {
980 decl_struct *dstruct = T.structs->list[i];
981
982 if (validate_decl_struct(&T, dstruct)) {
983 C->structs = add_decl_struct(C->structs, dstruct);
984 }
985 }
986
987 for (i = 0; i < T.decls->count; ++i) {
988 decl *decl = T.decls->list[i];
989
990 if (validate_decl(&T, NULL, decl)) {
991 C->decls = add_decl(C->decls, decl);
992 }
993 }
994
995 C->count = 1;
996 C->data = malloc(sizeof(*C->data));
997 PSI_DataExchange(C->data, &T);
998
999 return C;
1000 }
1001
1002 int PSI_ContextValidate(PSI_Context *C, PSI_Parser *P)
1003 {
1004 PSI_Data *D;
1005 void *dlopened = NULL;
1006 size_t count = C->count++;
1007
1008 C->data = realloc(C->data, C->count * sizeof(*C->data));
1009 D = PSI_DataExchange(&C->data[count], PSI_DATA(P));
1010
1011 if (D->defs) {
1012 size_t i;
1013
1014 for (i = 0; i < D->defs->count; ++i) {
1015 if (validate_decl_typedef(PSI_DATA(C), D->defs->list[i])) {
1016 C->defs = add_decl_typedef(C->defs, D->defs->list[i]);
1017 }
1018 }
1019 }
1020 if (D->structs) {
1021 size_t i;
1022
1023 for (i = 0; i < D->structs->count; ++i) {
1024 if (validate_decl_struct(PSI_DATA(C), D->structs->list[i])) {
1025 C->structs = add_decl_struct(C->structs, D->structs->list[i]);
1026 }
1027 }
1028 }
1029 if (D->consts) {
1030 size_t i;
1031
1032 for (i = 0; i < D->consts->count; ++i) {
1033 if (validate_constant(PSI_DATA(C), D->consts->list[i])) {
1034 C->consts = add_constant(C->consts, D->consts->list[i]);
1035 }
1036 }
1037 }
1038
1039 if (!validate_lib(D, &dlopened)) {
1040 return 0;
1041 }
1042
1043 add_decl_lib(&C->psi.libs, dlopened);
1044
1045 if (D->decls) {
1046 size_t i;
1047
1048 for (i = 0; i < D->decls->count; ++i) {
1049 if (validate_decl(PSI_DATA(C), dlopened, D->decls->list[i])) {
1050 C->decls = add_decl(C->decls, D->decls->list[i]);
1051 }
1052 }
1053 }
1054 if (D->impls) {
1055 size_t i;
1056
1057 for (i = 0; i < D->impls->count; ++i) {
1058 if (validate_impl_stmts(PSI_DATA(C), D->impls->list[i])) {
1059 C->impls = add_impl(C->impls, D->impls->list[i]);
1060 }
1061 }
1062 }
1063
1064 return 1;
1065 }
1066
1067 static int psi_select_dirent(const struct dirent *entry)
1068 {
1069 #ifndef FNM_CASEFOLD
1070 #define FNM_CASEFOLD 0
1071 #endif
1072 return 0 == fnmatch("*.psi", entry->d_name, FNM_CASEFOLD);
1073 }
1074
1075 void PSI_ContextBuild(PSI_Context *C, const char *paths)
1076 {
1077 int i, n, flags = psi_check_env("PSI_DEBUG") ? PSI_PARSER_DEBUG : 0;
1078 char *sep = NULL, *cpy = strdup(paths), *ptr = cpy;
1079 struct dirent **entries = NULL;
1080
1081
1082 do {
1083 sep = strchr(ptr, ':');
1084
1085 if (sep) {
1086 *sep = 0;
1087 }
1088
1089 n = php_scandir(ptr, &entries, psi_select_dirent, alphasort);
1090
1091 if (n > 0) {
1092 for (i = 0; i < n; ++i) {
1093 char psi[MAXPATHLEN];
1094 PSI_Parser P;
1095
1096 if (MAXPATHLEN <= slprintf(psi, MAXPATHLEN, "%s/%s", ptr, entries[i]->d_name)) {
1097 C->error(PSI_WARNING, "Path to PSI file too long: %s/%s",
1098 ptr, entries[i]->d_name);
1099 }
1100 if (!PSI_ParserInit(&P, psi, C->error, flags)) {
1101 C->error(PSI_WARNING, "Failed to init PSI parser (%s): %s",
1102 psi, strerror(errno));
1103 continue;
1104 }
1105
1106 while (0 < PSI_ParserScan(&P)) {
1107 PSI_ParserParse(&P, PSI_TokenAlloc(&P));
1108 if (P.num == PSI_T_EOF) {
1109 break;
1110 }
1111 }
1112
1113 PSI_ParserParse(&P, NULL);
1114 PSI_ContextValidate(C, &P);
1115 PSI_ParserDtor(&P);
1116 }
1117 }
1118
1119 if (entries) {
1120 for (i = 0; i < n; ++i) {
1121 free(entries[i]);
1122 }
1123 free(entries);
1124 }
1125
1126 ptr = sep + 1;
1127 } while (sep);
1128
1129
1130 if (PSI_ContextCompile(C) && SUCCESS != zend_register_functions(NULL, C->closures, NULL, MODULE_PERSISTENT)) {
1131 C->error(PSI_WARNING, "Failed to register functions!");
1132 }
1133
1134 free(cpy);
1135
1136 }
1137
1138 zend_function_entry *PSI_ContextCompile(PSI_Context *C)
1139 {
1140 size_t i;
1141
1142 if (C->consts) {
1143 zend_constant zc;
1144
1145 zc.flags = CONST_PERSISTENT|CONST_CS;
1146 zc.module_number = EG(current_module)->module_number;
1147
1148 for (i = 0; i < C->consts->count; ++i) {
1149 constant *c = C->consts->list[i];
1150
1151 zc.name = zend_string_init(c->name + (c->name[0] == '\\'), strlen(c->name) - (c->name[0] == '\\'), 1);
1152 ZVAL_NEW_STR(&zc.value, zend_string_init(c->val->text, strlen(c->val->text), 1));
1153
1154 switch (c->type->type) {
1155 case PSI_T_BOOL:
1156 convert_to_boolean(&zc.value);
1157 break;
1158 case PSI_T_INT:
1159 convert_to_long(&zc.value);
1160 break;
1161 case PSI_T_FLOAT:
1162 convert_to_double(&zc.value);
1163 break;
1164 }
1165 zend_register_constant(&zc);
1166 }
1167 }
1168
1169 return C->closures = C->ops->compile(C);
1170 }
1171
1172
1173 void PSI_ContextCall(PSI_Context *C, impl_val *ret_val, decl *decl)
1174 {
1175 C->ops->call(C, ret_val, decl);
1176 }
1177
1178 static inline void dump_decl_type(int fd, decl_type *t) {
1179 const char *pre;
1180
1181 switch (t->type) {
1182 case PSI_T_STRUCT:
1183 pre = "struct ";
1184 break;
1185 default:
1186 pre = "";
1187 }
1188 dprintf(fd, "%s%s", pre, t->name);
1189 }
1190 static inline void dump_decl_var(int fd, decl_var *v) {
1191 dprintf(fd, "%.*s%s", v->pointer_level-!!v->array_size, "**********", v->name);
1192 if (v->array_size) {
1193 dprintf(fd, "[%u]", v->array_size);
1194 }
1195 }
1196 static inline void dump_decl_arg(int fd, decl_arg *a) {
1197 dump_decl_type(fd, a->type);
1198 dprintf(fd, " ");
1199 dump_decl_var(fd, a->var);
1200 }
1201 static inline void dump_level(int fd, unsigned level) {
1202 dprintf(fd, "%.*s", level, "\t\t\t\t\t\t\t\t\t");
1203 }
1204 static inline void dump_num_exp(int fd, num_exp *exp) {
1205 while (exp) {
1206 switch (exp->t) {
1207 case PSI_T_NUMBER:
1208 dprintf(fd, "%s", exp->u.numb);
1209 break;
1210 case PSI_T_NSNAME:
1211 dprintf(fd, "%s", exp->u.cnst->name);
1212 break;
1213 case PSI_T_NAME:
1214 dump_decl_var(fd, exp->u.dvar);
1215 break;
1216 EMPTY_SWITCH_DEFAULT_CASE();
1217 }
1218 if (exp->operand) {
1219 char op;
1220
1221 switch (exp->operator) {
1222 case PSI_T_PLUS: op = '+'; break;
1223 case PSI_T_MINUS: op = '-'; break;
1224 case PSI_T_ASTERISK:op = '*'; break;
1225 case PSI_T_SLASH: op = '/'; break;
1226 EMPTY_SWITCH_DEFAULT_CASE();
1227 }
1228 dprintf(fd, " %c ", op);
1229 }
1230 exp = exp->operand;
1231 }
1232 }
1233 static inline void dump_impl_set_value(int fd, set_value *set, unsigned level) {
1234 size_t i;
1235
1236 if (level > 1) {
1237 /* only if not directly after `set ...` */
1238 dump_level(fd, level);
1239 }
1240 dprintf(fd, "%s(", set->func->name);
1241
1242 for (i = 0; i < set->vars->count; ++i) {
1243 decl_var *svar = set->vars->vars[i];
1244 if (i) {
1245 dprintf(fd, ", ");
1246 }
1247 dump_decl_var(fd, svar);
1248 }
1249 if (set->num) {
1250 dprintf(fd, ", ");
1251 dump_num_exp(fd, set->num);
1252 }
1253 if (set->inner) {
1254 dprintf(fd, ",\n");
1255 for (i = 0; i < set->count; ++i) {
1256 dump_impl_set_value(fd, set->inner[i], level+1);
1257 }
1258 /* only if inner stmts, i.e. with new lines, were dumped */
1259 dump_level(fd, level);
1260 }
1261 if (level > 1) {
1262 dprintf(fd, "),\n");
1263 } else {
1264 dprintf(fd, ");\n");
1265 }
1266 }
1267 void PSI_ContextDump(PSI_Context *C, int fd)
1268 {
1269 size_t i, j, k, l;
1270
1271 #ifdef HAVE_LIBJIT
1272 if (C->ops == PSI_Libjit()) {
1273 dprintf(fd, "// psi.engine=jit\n");
1274 }
1275 #endif
1276 #ifdef HAVE_LIBFFI
1277 if (C->ops == PSI_Libffi()) {
1278 dprintf(fd, "// psi.engine=ffi\n");
1279 }
1280 #endif
1281 dprintf(fd, "\n");
1282
1283 if (C->defs) {
1284 for (i = 0; i < C->defs->count; ++i) {
1285 decl_typedef *tdef = C->defs->list[i];
1286
1287 dprintf(fd, "typedef ");
1288 dump_decl_type(fd, tdef->type);
1289 dprintf(fd, " %s;\n", tdef->alias);
1290 }
1291 dprintf(fd, "\n");
1292 }
1293
1294 if (C->structs) {
1295 for (i = 0; i < C->structs->count; ++i) {
1296 decl_struct *strct = C->structs->list[i];
1297
1298 dprintf(fd, "struct %s::(%zu) {\n", strct->name, strct->size);
1299 if (strct->args) for (j = 0; j < strct->args->count; ++j) {
1300 decl_arg *sarg = strct->args->args[j];
1301
1302 dprintf(fd, "\t");
1303 dump_decl_arg(fd, sarg);
1304 dprintf(fd, "::(%zu, %zu);\n", sarg->layout->pos, sarg->layout->len);
1305 }
1306 dprintf(fd, "}\n");
1307 }
1308 dprintf(fd, "\n");
1309 }
1310 if (C->consts) {
1311 for (i = 0; i < C->consts->count; ++i) {
1312 constant *cnst = C->consts->list[i];
1313
1314 dprintf(fd, "const %s %s = ", cnst->type->name, cnst->name);
1315 if (cnst->val->type == PSI_T_QUOTED_STRING) {
1316 dprintf(fd, "\"%s\";\n", cnst->val->text);
1317 } else {
1318 dprintf(fd, "%s;\n", cnst->val->text);
1319 }
1320 }
1321 dprintf(fd, "\n");
1322 }
1323 if (C->decls) {
1324 for (i = 0; i < C->decls->count; ++i) {
1325 decl *decl = C->decls->list[i];
1326
1327 dprintf(fd, "%s ", decl->abi->convention);
1328 dump_decl_arg(fd, decl->func);
1329 dprintf(fd, "(");
1330 if (decl->args) for (j = 0; j < decl->args->count; ++j) {
1331 if (j) {
1332 dprintf(fd, ", ");
1333 }
1334 dump_decl_arg(fd, decl->args->args[j]);
1335 }
1336 dprintf(fd, ");\n");
1337 }
1338 dprintf(fd, "\n");
1339 }
1340 if (C->impls) {
1341 for (i = 0; i < C->impls->count; ++i) {
1342 impl *impl = C->impls->list[i];
1343
1344 dprintf(fd, "function %s(", impl->func->name);
1345 if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
1346 impl_arg *iarg = impl->func->args->args[j];
1347
1348 dprintf(fd, "%s%s %s$%s",
1349 j ? ", " : "",
1350 iarg->type->name,
1351 iarg->var->reference ? "&" : "",
1352 iarg->var->name);
1353 if (iarg->def) {
1354 dprintf(fd, " = %s", iarg->def->text);
1355 }
1356 }
1357 dprintf(fd, ") : %s%s {\n",
1358 impl->func->return_reference ? "&":"",
1359 impl->func->return_type->name);
1360 if (impl->stmts) {
1361 for (j = 0; j < impl->stmts->let.count; ++j) {
1362 let_stmt *let = impl->stmts->let.list[j];
1363
1364 dprintf(fd, "\tlet %s", let->var->name);
1365 if (let->val) {
1366 dprintf(fd, " = %s", let->val->is_reference ? "&" : "");
1367 if (let->val->func) {
1368 dprintf(fd, "%s(", let->val->func->name);
1369 if (let->val->func->alloc) {
1370 dump_num_exp(fd, let->val->func->alloc->nmemb);
1371 dprintf(fd, ", ");
1372 dump_num_exp(fd, let->val->func->alloc->size);
1373 } else {
1374 dprintf(fd, "$%s", let->val->var->name);
1375 }
1376 dprintf(fd, ");\n");
1377 } else {
1378 dprintf(fd, "NULL;\n");
1379 }
1380 }
1381 }
1382 for (j = 0; j < impl->stmts->ret.count; ++j) {
1383 return_stmt *ret = impl->stmts->ret.list[j];
1384
1385 dprintf(fd, "\treturn ");
1386 dump_impl_set_value(fd, ret->set, 1);
1387 }
1388 for (j = 0; j < impl->stmts->set.count; ++j) {
1389 set_stmt *set = impl->stmts->set.list[j];
1390
1391 dprintf(fd, "\tset $%s = ", set->var->name);
1392 dump_impl_set_value(fd, set->val, 1);
1393 }
1394 for (j = 0; j < impl->stmts->fre.count; ++j) {
1395 free_stmt *fre = impl->stmts->fre.list[j];
1396
1397 dprintf(fd, "\tfree ");
1398 for (k = 0; k < fre->calls->count; ++k) {
1399 free_call *call = fre->calls->list[k];
1400
1401 if (k) {
1402 dprintf(fd, ", ");
1403 }
1404 dprintf(fd, "%s(", call->func);
1405 for (l = 0; l < call->vars->count; ++l) {
1406 decl_var *fvar = call->vars->vars[l];
1407
1408 dump_decl_var(fd, fvar);
1409 }
1410 dprintf(fd, ");\n");
1411 }
1412 }
1413 }
1414 dprintf(fd, "}\n");
1415 }
1416 dprintf(fd, "\n");
1417 }
1418 }
1419
1420 void PSI_ContextDtor(PSI_Context *C)
1421 {
1422 size_t i;
1423 zend_function_entry *zfe;
1424
1425 if (C->ops->dtor) {
1426 C->ops->dtor(C);
1427 }
1428
1429 free_decl_libs(&C->psi.libs);
1430
1431 if (C->data) {
1432 for (i = 0; i < C->count; ++i) {
1433 PSI_DataDtor(&C->data[i]);
1434 }
1435 free(C->data);
1436 }
1437
1438 if (C->closures) {
1439 for (zfe = C->closures; zfe->fname; ++zfe) {
1440 free((void *) zfe->arg_info);
1441 }
1442 free(C->closures);
1443 }
1444
1445 if (C->consts) {
1446 if (C->consts->list) {
1447 free(C->consts->list);
1448 }
1449 free(C->consts);
1450 }
1451 if (C->defs) {
1452 if (C->defs->list) {
1453 free(C->defs->list);
1454 }
1455 free(C->defs);
1456 }
1457 if (C->structs) {
1458 if (C->structs->list) {
1459 free(C->structs->list);
1460 }
1461 free(C->structs);
1462 }
1463 if (C->decls) {
1464 if (C->decls->list) {
1465 free(C->decls->list);
1466 }
1467 free(C->decls);
1468 }
1469 if (C->impls) {
1470 if (C->impls->list) {
1471 free(C->impls->list);
1472 }
1473 free(C->impls);
1474 }
1475
1476 memset(C, 0, sizeof(*C));
1477 }
1478
1479 void PSI_ContextFree(PSI_Context **C)
1480 {
1481 if (*C) {
1482 PSI_ContextDtor(*C);
1483 free(*C);
1484 *C = NULL;
1485 }
1486 }
PHP System Interface / POSIX Standard Interface