git.m6w6.name Git - m6w6/ext-psi/blob - 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 int validate_set_value(PSI_Data *data, set_value *set, decl_arg *ref, decl_args *ref_list) {
 422         size_t i;
 423         decl_type *ref_type = real_decl_type(ref->type);
 424         decl_var *set_var = set->vars->vars[0];
 425
 426         switch (set->func->type) {
 427         case PSI_T_TO_BOOL:
 428                 set->func->handler = psi_to_bool;
 429                 break;
 430         case PSI_T_TO_INT:
 431                 set->func->handler = psi_to_int;
 432                 break;
 433         case PSI_T_TO_FLOAT:
 434                 set->func->handler = psi_to_double;
 435                 break;
 436         case PSI_T_TO_STRING:
 437                 set->func->handler = psi_to_string;
 438                 break;
 439         case PSI_T_TO_ARRAY:
 440                 set->func->handler = psi_to_array;
 441                 break;
 442         case PSI_T_TO_OBJECT:
 443                 set->func->handler = psi_to_object;
 444                 break;
 445         case PSI_T_VOID:
 446                 set->func->handler = psi_to_void;
 447                 break;
 448         EMPTY_SWITCH_DEFAULT_CASE();
 449         }
 450
 451         for (i = 1; i < set->vars->count; ++i) {
 452                 if (!locate_decl_var_arg(set->vars->vars[i], ref_list)) {
 453                         return 0;
 454                 }
 455         }
 456         set_var->arg = ref;
 457
 458         if (set->count) {
 459                 int is_to_array = (set->func->type == PSI_T_TO_ARRAY);
 460                 int is_pointer_to_struct = (ref_type->type == PSI_T_STRUCT && ref->var->pointer_level);
 461
 462                 if (!is_to_array && !is_pointer_to_struct) {
 463                         data->error(E_WARNING, "Inner `set` statement casts only work with "
 464                                         "to_array() casts on structs or pointers: %s(%s...", set->func->name, set->vars->vars[0]->name);
 465                         return 0;
 466                 }
 467         }
 468
 469         if (ref_type->type == PSI_T_STRUCT) {
 470                 /* to_array(struct, to_...) */
 471                 for (i = 0; i < set->count; ++i) {
 472                         decl_var *sub_var = set->inner[i]->vars->vars[0];
 473                         decl_arg *sub_ref = locate_struct_member(ref_type->strct, sub_var);
 474
 475                         set->inner[i]->outer.set = set;
 476                         if (sub_ref) {
 477                                 if (!validate_set_value(data, set->inner[i], sub_ref, ref_type->strct->args)) {
 478                                         return 0;
 479                                 }
 480                         }
 481                 }
 482         } else if (set->count == 1) {
 483                 /* to_array(ptr, to_string(*ptr)) */
 484                 decl_var *sub_var = set->inner[0]->vars->vars[0];
 485                 decl_arg *sub_ref = locate_decl_var_arg(sub_var, ref_list);
 486
 487                 set->inner[0]->outer.set = set;
 488                 if (sub_ref) {
 489                         if (strcmp(sub_var->name, set_var->name)) {
 490                                 data->error(E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
 491                                 return 0;
 492                         }
 493                         if (!validate_set_value(data, set->inner[0], sub_ref, ref_list)) {
 494                                 return 0;
 495                         }
 496                 }
 497         } else if (set->count > 1) {
 498                 data->error(E_WARNING, "Inner `set` statement casts on pointers may only occur once");
 499                 return 0;
 500         }
 501
 502         return 1;
 503 }
 504 static inline decl *locate_impl_decl(decls *decls, return_stmt *ret) {
 505         if (decls) {
 506                 size_t i;
 507
 508                 for (i = 0; i < decls->count; ++i) {
 509                         if (!strcmp(decls->list[i]->func->var->name, ret->set->vars->vars[0]->name)) {
 510                                 ret->decl = decls->list[i]->func;
 511                                 return decls->list[i];
 512                         }
 513                 }
 514         }
 515
 516         return NULL;
 517 }
 518 static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
 519         return_stmt *ret;
 520
 521         /* we must have exactly one ret stmt delcaring the native func to call */
 522         /* and which type cast to apply */
 523         if (impl->stmts->ret.count != 1) {
 524                 if (impl->stmts->ret.count > 1) {
 525                         data->error(PSI_WARNING, "Too many `return` statements for implmentation %s;"
 526                                         " found %zu, exactly one is needed",
 527                                         impl->func->name, impl->stmts->ret.count);
 528                 } else {
 529                         data->error(PSI_WARNING, "Missing `return` statement for implementation %s",
 530                                         impl->func->name);
 531                 }
 532                 return 0;
 533         }
 534
 535         ret = impl->stmts->ret.list[0];
 536
 537         if (!(impl->decl = locate_impl_decl(data->decls, ret))) {
 538                 data->error(PSI_WARNING, "Missing declaration for implementation %s",
 539                                 impl->func->name);
 540                 return 0;
 541         }
 542
 543         if (!validate_set_value(data, ret->set, ret->decl, impl->decl->args)) {
 544                 return 0;
 545         }
 546
 547         impl->decl->impl = impl;
 548
 549         return 1;
 550 }
 551 static inline constant *locate_num_exp_constant(num_exp *exp, constants *consts) {
 552         size_t i;
 553
 554         for (i = 0; i < consts->count; ++i) {
 555                 constant *cnst = consts->list[i];
 556
 557                 if (!strcmp(cnst->name, exp->u.numb)) {
 558                         free(exp->u.numb);
 559                         return exp->u.cnst = cnst;
 560                 }
 561         }
 562
 563         return NULL;
 564 }
 565 static inline int validate_num_exp(PSI_Data *data, impl *impl, num_exp *exp) {
 566         switch (exp->t) {
 567         case PSI_T_NAME:
 568                 if (!locate_decl_var_arg(exp->u.dvar, impl->decl->args)) {
 569                         data->error(PSI_WARNING, "Unknown variable '%s' in numeric expression"
 570                                         " of implementation '%s'", exp->u.dvar->name, impl->func->name);
 571                         return 0;
 572                 }
 573                 return 1;
 574         case PSI_T_NSNAME:
 575                 if (!locate_num_exp_constant(exp, data->consts)) {
 576                         data->error(PSI_WARNING, "Unknown constant '%s' in numeric expression"
 577                                         " of implementation '%s'", exp->u.numb, impl->func->name);
 578                         return 0;
 579                 }
 580                 return 1;
 581         case PSI_T_NUMBER:
 582                 return 1;
 583         default:
 584                 return 0;
 585         }
 586 }
 587 static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
 588         size_t i, j;
 589         /* we can have multiple let stmts */
 590         /* check that we have a let stmt for every decl arg */
 591         if (impl->decl->args) for (i = 0; i < impl->decl->args->count; ++i) {
 592                 decl_arg *darg = impl->decl->args->args[i];
 593                 int check = 0;
 594
 595                 for (j = 0; j < impl->stmts->let.count; ++j) {
 596                         let_stmt *let = impl->stmts->let.list[j];
 597
 598                         if (!strcmp(let->var->name, darg->var->name)) {
 599                                 darg->let = let;
 600                                 check = 1;
 601                                 break;
 602                         }
 603                 }
 604                 if (!check) {
 605                         data->error(PSI_WARNING, "Missing `let` statement for arg '%s %.*s%s'"
 606                                         " of declaration '%s' for implementation '%s'",
 607                                         darg->type->name, (int) darg->var->pointer_level, "*****",
 608                                         darg->var->name, impl->decl->func->var->name, impl->func->name);
 609                         return 0;
 610                 }
 611         }
 612         /* check that the let_value references a known variable or NULL */
 613         for (i = 0; i < impl->stmts->let.count; ++i) {
 614                 let_stmt *let = impl->stmts->let.list[i];
 615                 int check = 0;
 616
 617                 if (let->val && let->val->func && let->val->func->alloc) {
 618                         if (!validate_num_exp(data, impl, let->val->func->alloc->nmemb)) {
 619                                 return 0;
 620                         }
 621                         if (!validate_num_exp(data, impl, let->val->func->alloc->size)) {
 622                                 return 0;
 623                         }
 624                 }
 625                 if (let->val && let->val->var) {
 626                         if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
 627                                 impl_arg *iarg = impl->func->args->args[j];
 628
 629                                 if (!strcmp(let->val->var->name, iarg->var->name)) {
 630                                         let->arg = iarg;
 631                                         check = 1;
 632                                         break;
 633                                 }
 634                         }
 635                         if (!check) {
 636                                 data->error(PSI_WARNING, "Unknown value '$%s' of `let` statement"
 637                                                 " for variable '%s' of implementation '%s'",
 638                                                 let->val->var->name, let->var->name, impl->func->name);
 639                                 return 0;
 640                         }
 641                 }
 642         }
 643         return 1;
 644 }
 645 static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
 646         size_t i, j, k;
 647         /* we can have any count of set stmts; processing out vars */
 648         /* check that set stmts reference known variables */
 649         for (i = 0; i < impl->stmts->set.count; ++i) {
 650                 set_stmt *set = impl->stmts->set.list[i];
 651                 int check = 0;
 652
 653                 if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
 654                         impl_arg *iarg = impl->func->args->args[j];
 655
 656                         if (!strcmp(set->var->name, iarg->var->name)) {
 657                                 set->arg = iarg;
 658                                 check = 1;
 659                                 break;
 660                         }
 661                 }
 662                 if (!check) {
 663                         data->error(PSI_WARNING, "Unknown variable '$%s' of `set` statement"
 664                                         " of implementation '%s'",
 665                                         set->var->name, impl->func->name);
 666                         return 0;
 667                 }
 668
 669                 for (j = 0; j < set->val->vars->count; ++j) {
 670                         decl_var *set_var = set->val->vars->vars[j];
 671
 672                         check = 0;
 673                         if (impl->decl->args) for (k = 0; k < impl->decl->args->count; ++k) {
 674                                 decl_arg *set_arg = impl->decl->args->args[k];
 675
 676                                 if (!strcmp(set_var->name, set_arg->var->name)) {
 677                                         check = 1;
 678                                         set_var->arg = set_arg;
 679                                         if (!validate_set_value(data, set->val, set_arg, impl->decl->args)) {
 680                                                 return 0;
 681                                         }
 682                                         break;
 683                                 }
 684                         }
 685
 686                         if (!check) {
 687                                 data->error(PSI_WARNING, "Unknown value '%s' of `set` statement"
 688                                                 " for variable '$%s' of implementation '%s'",
 689                                                 set_var->name, set->arg->var->name, impl->func->name);
 690                                 return 0;
 691                         }
 692                 }
 693         }
 694         return 1;
 695 }
 696 static inline decl *locate_free_decl(decls *decls, free_call *f) {
 697         if (decls)  {
 698                 size_t i;
 699
 700                 for (i = 0; i < decls->count; ++i) {
 701                         if (!strcmp(decls->list[i]->func->var->name, f->func)) {
 702                                 f->decl = decls->list[i];
 703                                 return decls->list[i];
 704                         }
 705                 }
 706         }
 707
 708         return NULL;
 709 }
 710 static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
 711         size_t i, j, k, l;
 712         /* we can have any count of free stmts; freeing any out vars */
 713         for (i = 0; i < impl->stmts->fre.count; ++i) {
 714                 free_stmt *fre = impl->stmts->fre.list[i];
 715
 716                 for (j = 0; j < fre->calls->count; ++j) {
 717                         free_call *free_call = fre->calls->list[j];
 718
 719                         /* first find the decl of the free func */
 720                         if (!locate_free_decl(data->decls, free_call)) {
 721                                 data->error(PSI_WARNING, "Unknown function '%s' in `free` statement"
 722                                                 " of implementation '%s'", free_call->func, impl->func->name);
 723                                 return 0;
 724                         }
 725                         if (!impl->decl->args) {
 726                                 data->error(PSI_WARNING, "Declaration '%s' of implementation '%s'"
 727                                                 " does not have any arguments to free",
 728                                                 impl->decl->func->var->name, impl->func->name);
 729                         }
 730
 731                         /* now check for known vars */
 732                         for (l = 0; l < free_call->vars->count; ++l) {
 733                                 int check = 0;
 734                                 decl_var *free_var = free_call->vars->vars[l];
 735
 736                                 for (k = 0; k < impl->decl->args->count; ++k) {
 737                                         decl_arg *free_arg = impl->decl->args->args[k];
 738
 739                                         if (!strcmp(free_var->name, free_arg->var->name)) {
 740                                                 check = 1;
 741                                                 free_var->arg = free_arg;
 742                                                 break;
 743                                         }
 744                                 }
 745
 746                                 if (!check) {
 747                                         data->error(PSI_WARNING, "Unknown variable '%s' of `free` statement"
 748                                                         " of implementation '%s'",
 749                                                         free_var->name, impl->func->name);
 750                                         return 0;
 751                                 }
 752                         }
 753                 }
 754         }
 755         return 1;
 756 }
 757 static inline int validate_impl_stmts(PSI_Data *data, impl *impl) {
 758         if (!impl->stmts) {
 759                 data->error(PSI_WARNING, "Missing body for implementation %s!",
 760                                 impl->func->name);
 761                 return 0;
 762         }
 763
 764         if (!validate_impl_ret_stmt(data, impl)) {
 765                 return 0;
 766         }
 767
 768         if (!validate_impl_let_stmts(data, impl)) {
 769                 return 0;
 770         }
 771         if (!validate_impl_set_stmts(data, impl)) {
 772                 return 0;
 773         }
 774         if (!validate_impl_free_stmts(data, impl)) {
 775                 return 0;
 776         }
 777
 778         return 1;
 779 }
 780
 781 PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErrorFunc error)
 782 {
 783         size_t i;
 784         PSI_Data T;
 785         struct psi_predef_type *predef_type;
 786         struct psi_predef_const *predef_const;
 787         struct psi_predef_struct *predef_struct;
 788         struct psi_predef_decl *predef_decl;
 789
 790         if (!C) {
 791                 C = malloc(sizeof(*C));
 792         }
 793         memset(C, 0, sizeof(*C));
 794
 795         C->error = error;
 796         C->ops = ops;
 797
 798         if (ops->init) {
 799                 ops->init(C);
 800         }
 801
 802         ZEND_ASSERT(ops->call != NULL);
 803         ZEND_ASSERT(ops->compile != NULL);
 804
 805         /* build up predefs in a temporary PSI_Data for validation */
 806         memset(&T, 0, sizeof(T));
 807         T.error = error;
 808
 809         for (predef_type = &psi_predef_types[0]; predef_type->type_tag; ++predef_type) {
 810                 decl_type *type = init_decl_type(predef_type->type_tag, predef_type->type_name);
 811                 decl_typedef *def = init_decl_typedef(predef_type->alias, type);
 812
 813                 T.defs = add_decl_typedef(T.defs, def);
 814         }
 815         for (predef_const = &psi_predef_consts[0]; predef_const->type_tag; ++predef_const) {
 816                 impl_def_val *val = init_impl_def_val(predef_const->val_type_tag, predef_const->val_text);
 817                 const_type *type = init_const_type(predef_const->type_tag, predef_const->type_name);
 818                 constant *constant = init_constant(type, predef_const->var_name, val);
 819
 820                 T.consts = add_constant(T.consts, constant);
 821         }
 822         for (predef_struct = &psi_predef_structs[0]; predef_struct->type_tag; ++predef_struct) {
 823                 struct psi_predef_struct *member;
 824                 decl_args *dargs = init_decl_args(NULL);
 825                 decl_struct *dstruct = init_decl_struct(predef_struct->var_name, dargs);
 826
 827                 dstruct->size = predef_struct->size;
 828                 for (member = &predef_struct[1]; member->type_tag; ++member) {
 829                         decl_type *type;
 830                         decl_var *dvar;
 831                         decl_arg *darg;
 832
 833                         type = init_decl_type(member->type_tag, member->type_name);
 834                         dvar = init_decl_var(member->var_name, member->pointer_level, member->array_size);
 835                         darg = init_decl_arg(type, dvar);
 836                         darg->layout = init_decl_struct_layout(member->offset, member->size);
 837                         dargs = add_decl_arg(dargs, darg);
 838                 }
 839
 840                 T.structs = add_decl_struct(T.structs, dstruct);
 841                 predef_struct = member;
 842         }
 843         for (predef_decl = &psi_predef_decls[0]; predef_decl->type_tag; ++predef_decl) {
 844                 struct psi_predef_decl *farg;
 845                 decl_type *ftype = init_decl_type(predef_decl->type_tag, predef_decl->type_name);
 846                 decl_var *fname = init_decl_var(predef_decl->var_name, predef_decl->pointer_level, predef_decl->array_size);
 847                 decl_arg *func = init_decl_arg(ftype, fname);
 848                 decl_args *args = init_decl_args(NULL);
 849                 decl *decl = init_decl(init_decl_abi("default"), func, args);
 850
 851
 852                 for (farg = &predef_decl[1]; farg->type_tag; ++farg) {
 853                         decl_type *arg_type = init_decl_type(farg->type_tag, farg->type_name);
 854                         decl_var *arg_var = init_decl_var(farg->var_name, farg->pointer_level, farg->array_size);
 855                         decl_arg *darg = init_decl_arg(arg_type, arg_var);
 856                         args = add_decl_arg(args, darg);
 857                 }
 858
 859                 T.decls = add_decl(T.decls, decl);
 860                 predef_decl = farg;
 861         }
 862
 863         for (i = 0; i < T.defs->count; ++i) {
 864                 decl_typedef *def = T.defs->list[i];
 865
 866                 if (validate_decl_typedef(&T, def)) {
 867                         C->defs = add_decl_typedef(C->defs, def);
 868                 }
 869         }
 870
 871         for (i = 0; i < T.consts->count; ++i) {
 872                 constant *constant = T.consts->list[i];
 873
 874                 if (validate_constant(&T, constant)) {
 875                         C->consts = add_constant(C->consts, constant);
 876                 }
 877         }
 878
 879         for (i = 0; i < T.structs->count; ++i) {
 880                 decl_struct *dstruct = T.structs->list[i];
 881
 882                 if (validate_decl_struct(&T, dstruct)) {
 883                         C->structs = add_decl_struct(C->structs, dstruct);
 884                 }
 885         }
 886
 887         for (i = 0; i < T.decls->count; ++i) {
 888                 decl *decl = T.decls->list[i];
 889
 890                 if (validate_decl(&T, NULL, decl)) {
 891                         C->decls = add_decl(C->decls, decl);
 892                 }
 893         }
 894
 895         C->count = 1;
 896         C->data = malloc(sizeof(*C->data));
 897         PSI_DataExchange(C->data, &T);
 898
 899         return C;
 900 }
 901
 902 int PSI_ContextValidate(PSI_Context *C, PSI_Parser *P)
 903 {
 904         PSI_Data *D;
 905         void *dlopened = NULL;
 906         size_t count = C->count++;
 907
 908         C->data = realloc(C->data, C->count * sizeof(*C->data));
 909         D = PSI_DataExchange(&C->data[count], PSI_DATA(P));
 910
 911         if (D->defs) {
 912                 size_t i;
 913
 914                 for (i = 0; i < D->defs->count; ++i) {
 915                         if (validate_decl_typedef(PSI_DATA(C), D->defs->list[i])) {
 916                                 C->defs = add_decl_typedef(C->defs, D->defs->list[i]);
 917                         }
 918                 }
 919         }
 920         if (D->structs) {
 921                 size_t i;
 922
 923                 for (i = 0; i < D->structs->count; ++i) {
 924                         if (validate_decl_struct(PSI_DATA(C), D->structs->list[i])) {
 925                                 C->structs = add_decl_struct(C->structs, D->structs->list[i]);
 926                         }
 927                 }
 928         }
 929         if (D->consts) {
 930                 size_t i;
 931
 932                 for (i = 0; i < D->consts->count; ++i) {
 933                         if (validate_constant(PSI_DATA(C), D->consts->list[i])) {
 934                                 C->consts = add_constant(C->consts, D->consts->list[i]);
 935                         }
 936                 }
 937         }
 938
 939         if (!validate_lib(D, &dlopened)) {
 940                 return 0;
 941         }
 942
 943         add_decl_lib(&C->psi.libs, dlopened);
 944
 945         if (D->decls) {
 946                 size_t i;
 947
 948                 for (i = 0; i < D->decls->count; ++i) {
 949                         if (validate_decl(PSI_DATA(C), dlopened, D->decls->list[i])) {
 950                                 C->decls = add_decl(C->decls, D->decls->list[i]);
 951                         }
 952                 }
 953         }
 954         if (D->impls) {
 955                 size_t i;
 956
 957                 for (i = 0; i < D->impls->count; ++i) {
 958                         if (validate_impl_stmts(PSI_DATA(C), D->impls->list[i])) {
 959                                 C->impls = add_impl(C->impls, D->impls->list[i]);
 960                         }
 961                 }
 962         }
 963
 964         return 1;
 965 }
 966
 967 static int psi_select_dirent(const struct dirent *entry)
 968 {
 969 #ifndef FNM_CASEFOLD
 970 #define FNM_CASEFOLD 0
 971 #endif
 972         return 0 == fnmatch("*.psi", entry->d_name, FNM_CASEFOLD);
 973 }
 974
 975 void PSI_ContextBuild(PSI_Context *C, const char *paths)
 976 {
 977         int i, n, flags = psi_check_env("PSI_DEBUG") ? PSI_PARSER_DEBUG : 0;
 978         char *sep = NULL, *cpy = strdup(paths), *ptr = cpy;
 979         struct dirent **entries = NULL;
 980
 981
 982         do {
 983                 sep = strchr(ptr, ':');
 984
 985                 if (sep) {
 986                         *sep = 0;
 987                 }
 988
 989                 n = php_scandir(ptr, &entries, psi_select_dirent, alphasort);
 990
 991                 if (n > 0) {
 992                         for (i = 0; i < n; ++i) {
 993                                 char psi[MAXPATHLEN];
 994                                 PSI_Parser P;
 995
 996                                 if (MAXPATHLEN <= slprintf(psi, MAXPATHLEN, "%s/%s", ptr, entries[i]->d_name)) {
 997                                         C->error(PSI_WARNING, "Path to PSI file too long: %s/%s",
 998                                                 ptr, entries[i]->d_name);
 999                                 }
1000                                 if (!PSI_ParserInit(&P, psi, C->error, flags)) {
1001                                         C->error(PSI_WARNING, "Failed to init PSI parser (%s): %s",
1002                                                 psi, strerror(errno));
1003                                         continue;
1004                                 }
1005
1006                                 while (0 < PSI_ParserScan(&P)) {
1007                                         PSI_ParserParse(&P, PSI_TokenAlloc(&P));
1008                                         if (P.num == PSI_T_EOF) {
1009                                                 break;
1010                                         }
1011                                 }
1012
1013                                 PSI_ParserParse(&P, NULL);
1014                                 PSI_ContextValidate(C, &P);
1015                                 PSI_ParserDtor(&P);
1016                         }
1017                 }
1018
1019                 if (entries) {
1020                         for (i = 0; i < n; ++i) {
1021                                 free(entries[i]);
1022                         }
1023                         free(entries);
1024                 }
1025
1026                 ptr = sep + 1;
1027         } while (sep);
1028
1029
1030         if (PSI_ContextCompile(C) && SUCCESS != zend_register_functions(NULL, C->closures, NULL, MODULE_PERSISTENT)) {
1031                 C->error(PSI_WARNING, "Failed to register functions!");
1032         }
1033
1034         free(cpy);
1035
1036 }
1037
1038 zend_function_entry *PSI_ContextCompile(PSI_Context *C)
1039 {
1040         size_t i;
1041
1042         if (C->consts) {
1043                 zend_constant zc;
1044
1045                 zc.flags = CONST_PERSISTENT|CONST_CS;
1046                 zc.module_number = EG(current_module)->module_number;
1047
1048                 for (i = 0; i < C->consts->count; ++i) {
1049                         constant *c = C->consts->list[i];
1050
1051                         zc.name = zend_string_init(c->name + (c->name[0] == '\\'), strlen(c->name) - (c->name[0] == '\\'), 1);
1052                         ZVAL_NEW_STR(&zc.value, zend_string_init(c->val->text, strlen(c->val->text), 1));
1053
1054                         switch (c->type->type) {
1055                         case PSI_T_BOOL:
1056                                 convert_to_boolean(&zc.value);
1057                                 break;
1058                         case PSI_T_INT:
1059                                 convert_to_long(&zc.value);
1060                                 break;
1061                         case PSI_T_FLOAT:
1062                                 convert_to_double(&zc.value);
1063                                 break;
1064                         }
1065                         zend_register_constant(&zc);
1066                 }
1067         }
1068
1069         return C->closures = C->ops->compile(C);
1070 }
1071
1072
1073 void PSI_ContextCall(PSI_Context *C, impl_val *ret_val, decl *decl)
1074 {
1075         errno = 0;
1076         C->ops->call(C, ret_val, decl);
1077 }
1078
1079 static inline void dump_decl_type(int fd, decl_type *t) {
1080         const char *pre;
1081
1082         switch (t->type) {
1083         case PSI_T_STRUCT:
1084                 pre = "struct ";
1085                 break;
1086         default:
1087                 pre = "";
1088         }
1089         dprintf(fd, "%s%s", pre, t->name);
1090 }
1091 static inline void dump_decl_var(int fd, decl_var *v) {
1092         dprintf(fd, "%.*s%s", v->pointer_level-!!v->array_size, "**********", v->name);
1093         if (v->array_size) {
1094                 dprintf(fd, "[%u]", v->array_size);
1095         }
1096 }
1097 static inline void dump_decl_arg(int fd, decl_arg *a) {
1098         dump_decl_type(fd, a->type);
1099         dprintf(fd, " ");
1100         dump_decl_var(fd, a->var);
1101 }
1102 static inline void dump_level(int fd, unsigned level) {
1103         dprintf(fd, "%.*s", level, "\t\t\t\t\t\t\t\t\t");
1104 }
1105 static inline void dump_impl_set_value(int fd, set_value *set, unsigned level) {
1106         size_t i;
1107
1108         if (level > 1) {
1109                 /* only if not directly after `set ...` */
1110                 dump_level(fd, level);
1111         }
1112         dprintf(fd, "%s(", set->func->name);
1113
1114         for (i = 0; i < set->vars->count; ++i) {
1115                 decl_var *svar = set->vars->vars[i];
1116                 if (i) {
1117                         dprintf(fd, ", ");
1118                 }
1119                 dump_decl_var(fd, svar);
1120         }
1121         if (set->inner) {
1122                 dprintf(fd, ",\n");
1123                 for (i = 0; i < set->count; ++i) {
1124                         dump_impl_set_value(fd, set->inner[i], level+1);
1125                 }
1126                 /* only if inner stmts, i.e. with new lines, were dumped */
1127                 dump_level(fd, level);
1128         }
1129         if (level > 1) {
1130                 dprintf(fd, "),\n");
1131         } else {
1132                 dprintf(fd, ");\n");
1133         }
1134 }
1135 static inline void dump_num_exp(int fd, num_exp *exp) {
1136         switch (exp->t) {
1137         case PSI_T_NUMBER:
1138                 dprintf(fd, "%s", exp->u.numb);
1139                 break;
1140         case PSI_T_NAME:
1141                 dump_decl_var(fd, exp->u.dvar);
1142                 break;
1143         case PSI_T_NSNAME:
1144                 dprintf(fd, "%s", exp->u.cnst->name);
1145                 break;
1146         EMPTY_SWITCH_DEFAULT_CASE();
1147         }
1148 }
1149 void PSI_ContextDump(PSI_Context *C, int fd)
1150 {
1151         size_t i, j, k, l;
1152
1153 #ifdef HAVE_LIBJIT
1154         if (C->ops == PSI_Libjit()) {
1155                 dprintf(fd, "// psi.engine=jit\n");
1156         }
1157 #endif
1158 #ifdef HAVE_LIBFFI
1159         if (C->ops == PSI_Libffi()) {
1160                 dprintf(fd, "// psi.engine=ffi\n");
1161         }
1162 #endif
1163         dprintf(fd, "\n");
1164
1165         if (C->defs) {
1166                 for (i = 0; i < C->defs->count; ++i) {
1167                         decl_typedef *tdef = C->defs->list[i];
1168
1169                         dprintf(fd, "typedef ");
1170                         dump_decl_type(fd, tdef->type);
1171                         dprintf(fd, " %s;\n", tdef->alias);
1172                 }
1173                 dprintf(fd, "\n");
1174         }
1175
1176         if (C->structs) {
1177                 for (i = 0; i < C->structs->count; ++i) {
1178                         decl_struct *strct = C->structs->list[i];
1179
1180                         dprintf(fd, "struct %s::(%zu) {\n", strct->name, strct->size);
1181                         if (strct->args) for (j = 0; j < strct->args->count; ++j) {
1182                                 decl_arg *sarg = strct->args->args[j];
1183
1184                                 dprintf(fd, "\t");
1185                                 dump_decl_arg(fd, sarg);
1186                                 dprintf(fd, "::(%zu, %zu);\n", sarg->layout->pos, sarg->layout->len);
1187                         }
1188                         dprintf(fd, "}\n");
1189                 }
1190                 dprintf(fd, "\n");
1191         }
1192         if (C->consts) {
1193                 for (i = 0; i < C->consts->count; ++i) {
1194                         constant *cnst = C->consts->list[i];
1195
1196                         dprintf(fd, "const %s %s = ", cnst->type->name, cnst->name);
1197                         if (cnst->val->type == PSI_T_QUOTED_STRING) {
1198                                 dprintf(fd, "\"%s\";\n", cnst->val->text);
1199                         } else {
1200                                 dprintf(fd, "%s;\n", cnst->val->text);
1201                         }
1202                 }
1203                 dprintf(fd, "\n");
1204         }
1205         if (C->decls) {
1206                 for (i = 0; i < C->decls->count; ++i) {
1207                         decl *decl = C->decls->list[i];
1208
1209                         dprintf(fd, "%s ", decl->abi->convention);
1210                         dump_decl_arg(fd, decl->func);
1211                         dprintf(fd, "(");
1212                         if (decl->args) for (j = 0; j < decl->args->count; ++j) {
1213                                 if (j) {
1214                                         dprintf(fd, ", ");
1215                                 }
1216                                 dump_decl_arg(fd, decl->args->args[j]);
1217                         }
1218                         dprintf(fd, ");\n");
1219                 }
1220                 dprintf(fd, "\n");
1221         }
1222         if (C->impls) {
1223                 for (i = 0; i < C->impls->count; ++i) {
1224                         impl *impl = C->impls->list[i];
1225
1226                         dprintf(fd, "function %s(", impl->func->name);
1227                         if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
1228                                 impl_arg *iarg = impl->func->args->args[j];
1229
1230                                 dprintf(fd, "%s%s %s$%s",
1231                                                 j ? ", " : "",
1232                                                 iarg->type->name,
1233                                                 iarg->var->reference ? "&" : "",
1234                                                 iarg->var->name);
1235                                 if (iarg->def) {
1236                                         dprintf(fd, " = %s", iarg->def->text);
1237                                 }
1238                         }
1239                         dprintf(fd, ") : %s%s {\n",
1240                                         impl->func->return_reference ? "&":"",
1241                                         impl->func->return_type->name);
1242                         if (impl->stmts) {
1243                                 for (j = 0; j < impl->stmts->let.count; ++j) {
1244                                         let_stmt *let = impl->stmts->let.list[j];
1245
1246                                         dprintf(fd, "\tlet %s", let->var->name);
1247                                         if (let->val) {
1248                                                 dprintf(fd, " = %s", let->val->is_reference ? "&" : "");
1249                                                 if (let->val->func) {
1250                                                         dprintf(fd, "%s(", let->val->func->name);
1251                                                         if (let->val->func->alloc) {
1252                                                                 dump_num_exp(fd, let->val->func->alloc->nmemb);
1253                                                                 dprintf(fd, ", ");
1254                                                                 dump_num_exp(fd, let->val->func->alloc->size);
1255                                                         } else {
1256                                                                 dprintf(fd, "$%s", let->val->var->name);
1257                                                         }
1258                                                         dprintf(fd, ");\n");
1259                                                 } else {
1260                                                         dprintf(fd, "NULL;\n");
1261                                                 }
1262                                         }
1263                                 }
1264                                 for (j = 0; j < impl->stmts->ret.count; ++j) {
1265                                         return_stmt *ret = impl->stmts->ret.list[j];
1266
1267                                         dprintf(fd, "\treturn ");
1268                                         dump_impl_set_value(fd, ret->set, 1);
1269                                 }
1270                                 for (j = 0; j < impl->stmts->set.count; ++j) {
1271                                         set_stmt *set = impl->stmts->set.list[j];
1272
1273                                         dprintf(fd, "\tset $%s = ", set->var->name);
1274                                         dump_impl_set_value(fd, set->val, 1);
1275                                 }
1276                                 for (j = 0; j < impl->stmts->fre.count; ++j) {
1277                                         free_stmt *fre = impl->stmts->fre.list[j];
1278
1279                                         dprintf(fd, "\tfree ");
1280                                         for (k = 0; k < fre->calls->count; ++k) {
1281                                                 free_call *call = fre->calls->list[k];
1282
1283                                                 if (k) {
1284                                                         dprintf(fd, ", ");
1285                                                 }
1286                                                 dprintf(fd, "%s(", call->func);
1287                                                 for (l = 0; l < call->vars->count; ++l) {
1288                                                         decl_var *fvar = call->vars->vars[l];
1289
1290                                                         dump_decl_var(fd, fvar);
1291                                                 }
1292                                                 dprintf(fd, ");\n");
1293                                         }
1294                                 }
1295                         }
1296                         dprintf(fd, "}\n");
1297                 }
1298                 dprintf(fd, "\n");
1299         }
1300 }
1301
1302 void PSI_ContextDtor(PSI_Context *C)
1303 {
1304         size_t i;
1305         zend_function_entry *zfe;
1306
1307         if (C->ops->dtor) {
1308                 C->ops->dtor(C);
1309         }
1310
1311         free_decl_libs(&C->psi.libs);
1312
1313         if (C->data) {
1314                 for (i = 0; i < C->count; ++i) {
1315                         PSI_DataDtor(&C->data[i]);
1316                 }
1317                 free(C->data);
1318         }
1319
1320         if (C->closures) {
1321                 for (zfe = C->closures; zfe->fname; ++zfe) {
1322                         free((void *) zfe->arg_info);
1323                 }
1324                 free(C->closures);
1325         }
1326
1327         if (C->consts) {
1328                 if (C->consts->list) {
1329                         free(C->consts->list);
1330                 }
1331                 free(C->consts);
1332         }
1333         if (C->defs) {
1334                 if (C->defs->list) {
1335                         free(C->defs->list);
1336                 }
1337                 free(C->defs);
1338         }
1339         if (C->structs) {
1340                 if (C->structs->list) {
1341                         free(C->structs->list);
1342                 }
1343                 free(C->structs);
1344         }
1345         if (C->decls) {
1346                 if (C->decls->list) {
1347                         free(C->decls->list);
1348                 }
1349                 free(C->decls);
1350         }
1351         if (C->impls) {
1352                 if (C->impls->list) {
1353                         free(C->impls->list);
1354                 }
1355                 free(C->impls);
1356         }
1357
1358         memset(C, 0, sizeof(*C));
1359 }
1360
1361 void PSI_ContextFree(PSI_Context **C)
1362 {
1363         if (*C) {
1364                 PSI_ContextDtor(*C);
1365                 free(*C);
1366                 *C = NULL;
1367         }
1368 }