git.m6w6.name Git - m6w6/ext-psi/blob - src/engine.c

   1 #ifdef HAVE_CONFIG_H
   2 # include "config.h"
   3 #endif
   4
   5 #include "php.h"
   6 #include "php_psi.h"
   7
   8 #include "zend_exceptions.h"
   9
  10 #include "parser.h"
  11 #include "engine.h"
  12 #include "calc.h"
  13 #include "marshal.h"
  14
  15 size_t psi_t_alignment(token_t t)
  16 {
  17 #define PSI_ALIGNOF(T) case PSI_T_## T: return ALIGNOF_## T ##_T;
  18         switch (t) {
  19         PSI_ALIGNOF(INT8);
  20         PSI_ALIGNOF(UINT8);
  21         PSI_ALIGNOF(INT16);
  22         PSI_ALIGNOF(UINT16);
  23         PSI_ALIGNOF(INT32);
  24         PSI_ALIGNOF(UINT32);
  25         PSI_ALIGNOF(INT64);
  26         PSI_ALIGNOF(UINT64);
  27         case PSI_T_FLOAT:
  28                 return ALIGNOF_FLOAT;
  29         case PSI_T_DOUBLE:
  30                 return ALIGNOF_DOUBLE;
  31         case PSI_T_POINTER:
  32         case PSI_T_FUNCTION:
  33                 return ALIGNOF_VOID_P;
  34         case PSI_T_ENUM:
  35                 return ALIGNOF_INT;
  36         EMPTY_SWITCH_DEFAULT_CASE();
  37         }
  38         return 0;
  39 }
  40
  41 size_t psi_t_size(token_t t)
  42 {
  43 #define PSI_SIZEOF(T) case PSI_T_## T : return SIZEOF_## T ##_T;
  44         switch (t) {
  45         PSI_SIZEOF(INT8);
  46         PSI_SIZEOF(UINT8);
  47         PSI_SIZEOF(INT16);
  48         PSI_SIZEOF(UINT16);
  49         PSI_SIZEOF(INT32);
  50         PSI_SIZEOF(UINT32);
  51         PSI_SIZEOF(INT64);
  52         PSI_SIZEOF(UINT64);
  53         case PSI_T_FLOAT:
  54                 return SIZEOF_FLOAT;
  55         case PSI_T_DOUBLE:
  56                 return SIZEOF_DOUBLE;
  57         case PSI_T_POINTER:
  58         case PSI_T_FUNCTION:
  59                 return SIZEOF_VOID_P;
  60         case PSI_T_ENUM:
  61                 return SIZEOF_INT;
  62         EMPTY_SWITCH_DEFAULT_CASE();
  63         }
  64         return 0;
  65 }
  66
  67 int psi_internal_type(impl_type *type)
  68 {
  69         switch (type->type) {
  70         case PSI_T_BOOL:
  71                 return _IS_BOOL;
  72         case PSI_T_INT:
  73                 return IS_LONG;
  74         case PSI_T_FLOAT:
  75         case PSI_T_DOUBLE:
  76                 return IS_DOUBLE;
  77         case PSI_T_STRING:
  78                 return IS_STRING;
  79         case PSI_T_ARRAY:
  80                 return IS_ARRAY;
  81         default:
  82                 return 0;
  83         }
  84 }
  85
  86 zend_internal_arg_info *psi_internal_arginfo(impl *impl)
  87 {
  88         size_t i;
  89         zend_internal_arg_info *aip;
  90         zend_internal_function_info *fi;
  91
  92         aip = calloc(impl->func->args->count + 1 + !!impl->func->args->vararg.name, sizeof(*aip));
  93
  94         fi = (zend_internal_function_info *) &aip[0];
  95         fi->allow_null = 1;
  96         fi->required_num_args = psi_num_min_args(impl);
  97         fi->return_reference = impl->func->return_reference;
  98         fi->type_hint = psi_internal_type(impl->func->return_type);
  99
 100         if (impl->func->args->vararg.name) {
 101                 impl_arg *vararg = impl->func->args->vararg.name;
 102                 zend_internal_arg_info *ai = &aip[impl->func->args->count];
 103
 104                 ai->name = vararg->var->name;
 105                 ai->allow_null = 1;
 106                 ai->type_hint = psi_internal_type(vararg->type);
 107                 if (vararg->var->reference) {
 108                         ai->pass_by_reference = 1;
 109                 }
 110                 ai->is_variadic = 1;
 111         }
 112
 113         for (i = 0; i < impl->func->args->count; ++i) {
 114                 impl_arg *iarg = impl->func->args->args[i];
 115                 zend_internal_arg_info *ai = &aip[i+1];
 116
 117                 ai->name = iarg->var->name;
 118                 ai->type_hint = psi_internal_type(iarg->type);
 119                 if (iarg->var->reference) {
 120                         ai->pass_by_reference = 1;
 121                 }
 122                 //if (iarg->var->reference || (iarg->def && iarg->def->type == PSI_T_NULL)) {
 123                         ai->allow_null = 1;
 124                 //}
 125         }
 126
 127         return aip;
 128 }
 129
 130 size_t psi_num_min_args(impl *impl)
 131 {
 132         size_t i, n = impl->func->args->count;
 133
 134         for (i = 0; i < impl->func->args->count; ++i) {
 135                 if (impl->func->args->args[i]->def) {
 136                         --n;
 137                 }
 138         }
 139         return n;
 140 }
 141
 142
 143 static inline ZEND_RESULT_CODE psi_parse_args(zend_execute_data *execute_data, impl *impl)
 144 {
 145         size_t i;
 146         impl_arg *iarg;
 147         zend_error_handling zeh;
 148
 149         zend_replace_error_handling(EH_THROW, zend_exception_get_default(), &zeh);
 150
 151         if (!impl->func->args->count) {
 152                 ZEND_RESULT_CODE rv;
 153
 154                 rv = zend_parse_parameters_none();
 155                 zend_restore_error_handling(&zeh);
 156                 return rv;
 157         }
 158
 159         ZEND_PARSE_PARAMETERS_START(psi_num_min_args(impl), impl->func->args->vararg.name ? -1 : impl->func->args->count)
 160         nextarg:
 161                 if (impl->func->args->vararg.name && _i >= impl->func->args->count) {
 162                         impl_arg *varg = impl->func->args->vararg.name;
 163                         iarg = init_impl_arg(
 164                                         init_impl_type(varg->type->type, varg->type->name),
 165                                         init_impl_var(varg->var->name, varg->var->reference),
 166                                         NULL);
 167
 168                         Z_PARAM_OPTIONAL;
 169                         if (_i == impl->func->args->count) {
 170                                 impl->func->args->vararg.args = init_impl_args(iarg);
 171                         } else {
 172                                 add_impl_arg(impl->func->args->vararg.args, iarg);
 173                         }
 174                 } else {
 175                         iarg = impl->func->args->args[_i];
 176                         if (iarg->def) {
 177                                 Z_PARAM_OPTIONAL;
 178                         }
 179                 }
 180                 if (PSI_T_BOOL == iarg->type->type) {
 181                         Z_PARAM_BOOL(iarg->val.zend.bval);
 182                 } else if (PSI_T_INT == iarg->type->type) {
 183                         Z_PARAM_LONG(iarg->val.zend.lval);
 184                 } else if (PSI_T_FLOAT == iarg->type->type || PSI_T_DOUBLE == iarg->type->type) {
 185                         Z_PARAM_DOUBLE(iarg->val.dval);
 186                 } else if (PSI_T_STRING == iarg->type->type) {
 187                         Z_PARAM_STR_EX(iarg->val.zend.str, 1, iarg->var->reference);
 188                         if (iarg->val.zend.str) {
 189                                 zend_string_addref(iarg->val.zend.str);
 190                         }
 191                 } else if (PSI_T_ARRAY == iarg->type->type) {
 192                         Z_PARAM_PROLOGUE(0);
 193                 } else if (PSI_T_OBJECT == iarg->type->type) {
 194                         Z_PARAM_PROLOGUE(0);
 195                 } else if (PSI_T_MIXED == iarg->type->type) {
 196                         Z_PARAM_PROLOGUE(0);
 197                 } else if (PSI_T_CALLABLE == iarg->type->type) {
 198                         zend_fcall_info fci;
 199                         zend_fcall_info_cache fcc;
 200
 201                         Z_PARAM_FUNC_EX(fci, fcc, 1, 0);
 202
 203                         if (fci.size) {
 204                                 iarg->val.zend.cb = calloc(1, sizeof(zend_fcall));
 205                                 iarg->val.zend.cb->fci = fci;
 206                                 iarg->val.zend.cb->fcc = fcc;
 207                         }
 208                 } else {
 209                         error_code = ZPP_ERROR_FAILURE;
 210                         break;
 211                 }
 212                 iarg->_zv = _arg;
 213                 ZVAL_DEREF(iarg->_zv);
 214                 if (_i < _num_args) {
 215                         goto nextarg;
 216                 }
 217         ZEND_PARSE_PARAMETERS_END_EX(
 218                 zend_restore_error_handling(&zeh);
 219                 return FAILURE
 220         );
 221
 222         /* set up defaults */
 223         for (i = 0; i < impl->func->args->count; ++i) {
 224                 if (i >= EX_NUM_ARGS() && iarg->def) {
 225                         iarg = impl->func->args->args[i];
 226
 227                         switch (iarg->type->type) {
 228                         case PSI_T_BOOL:
 229                                 iarg->val.zend.bval = iarg->def->type == PSI_T_TRUE ? 1 : 0;
 230                                 break;
 231                         case PSI_T_INT:
 232                                 iarg->val.zend.lval = zend_atol(iarg->def->text, strlen(iarg->def->text));
 233                                 break;
 234                         case PSI_T_FLOAT:
 235                         case PSI_T_DOUBLE:
 236                                 iarg->val.dval = zend_strtod(iarg->def->text, NULL);
 237                                 break;
 238                         case PSI_T_STRING:
 239                                 /* FIXME */
 240                                 iarg->val.zend.str = zend_string_init(&iarg->def->text[1], strlen(iarg->def->text) - 2, 0);
 241                                 break;
 242                         }
 243                 }
 244         }
 245
 246         zend_restore_error_handling(&zeh);
 247         return SUCCESS;
 248 }
 249
 250 static inline void *psi_do_calloc(let_calloc *alloc)
 251 {
 252         zend_long n = psi_long_num_exp(alloc->nmemb, NULL), s = psi_long_num_exp(alloc->size, NULL);
 253         void *mem = safe_emalloc(n, s, sizeof(void *));
 254         memset(mem, 0, n * s + sizeof(void *));
 255 #if 0
 256         fprintf(stderr, "calloc: %p\n", mem);
 257 #endif
 258         return mem;
 259 }
 260
 261 static inline impl_val *psi_let_val(token_t let_func, impl_arg *iarg, impl_val *arg_val, decl_struct *strct, void **to_free)
 262 {
 263         abort();
 264         return arg_val;
 265 }
 266
 267 static inline impl_val *psi_let_func(let_func *func, decl_arg *darg) {
 268         return darg->ptr = func->handler(darg->ptr, darg->type, func->var->arg, &darg->mem);
 269 }
 270
 271 static inline void *psi_do_let(let_stmt *let)
 272 {
 273         decl_arg *darg = let->var->arg;
 274         impl_val *arg_val = darg->ptr;
 275
 276         switch (let->val ? let->val->kind : PSI_LET_NULL) {
 277         case PSI_LET_TMP:
 278                 memcpy(arg_val, deref_impl_val(let->val->data.var->arg->let->ptr, let->val->data.var), sizeof(*arg_val));
 279 #if 0
 280                 fprintf(stderr, "LET TMP: %p -> %p\n",
 281                                 let->val->data.var->arg->let->ptr,
 282                                 arg_val->ptr);
 283 #endif
 284                 break;
 285         case PSI_LET_NULL:
 286                 if (darg->var->array_size) {
 287                         arg_val->ptr = ecalloc(darg->var->array_size, sizeof(*arg_val));
 288                         darg->mem = arg_val->ptr;
 289                 } else {
 290                         memset(arg_val, 0, sizeof(*arg_val));
 291                 }
 292                 break;
 293         case PSI_LET_CALLOC:
 294                 arg_val->ptr = psi_do_calloc(let->val->data.alloc);
 295                 darg->mem = arg_val->ptr;
 296                 break;
 297         case PSI_LET_CALLBACK:
 298                 arg_val->ptr = let->val->data.callback->decl->call.sym;
 299                 break;
 300         case PSI_LET_NUMEXP:
 301                 arg_val->zend.lval = psi_long_num_exp(let->val->data.num, NULL);
 302                 break;
 303         case PSI_LET_FUNC:
 304                 if (!psi_let_func(let->val->data.func, darg)) {
 305                         return NULL;
 306                 }
 307                 break;
 308         }
 309
 310         if (let->val && let->val->flags.one.is_reference) {
 311                 return let->ptr = &darg->ptr;
 312         } else {
 313                 return let->ptr = darg->ptr;
 314         }
 315 }
 316
 317 static inline void psi_do_return(zval *return_value, return_stmt *ret)
 318 {
 319         ret->set->func->handler(return_value, ret->set, ret->set->vars->vars[0]->arg->ptr);
 320 }
 321
 322 static inline void psi_do_free(free_stmt *fre)
 323 {
 324         size_t i, j;
 325
 326         for (i = 0; i < fre->calls->count; ++i) {
 327                 free_call *f = fre->calls->list[i];
 328
 329                 for (j = 0; j < f->vars->count; ++j) {
 330                         decl_var *dvar = f->vars->vars[j];
 331                         decl_arg *darg = dvar->arg;
 332                         impl_val *fval = darg->let ? darg->let->ptr : darg->ptr;
 333
 334                         f->decl->call.args[j] = deref_impl_val(fval, dvar);
 335                 }
 336
 337                 /* FIXME: check in validate_* that free functions return scalar */
 338                 PSI_ContextCall(&PSI_G(context), &f->decl->call, NULL);
 339         }
 340 }
 341
 342 static inline void psi_clean_array_struct(decl_arg *darg) {
 343         if (darg->let
 344         &&      darg->let->val->kind == PSI_LET_FUNC
 345         &&      darg->let->val->data.func->type == PSI_T_ARRVAL) {
 346                 decl_type *type = real_decl_type(darg->type);
 347
 348                 if (type->type == PSI_T_STRUCT) {
 349                         void **ptr = (void **) ((char *) darg->mem + type->strct->size);
 350
 351                         while (*ptr) {
 352                                 efree(*ptr++);
 353                         }
 354                 }
 355         }
 356 }
 357
 358 static inline void psi_do_clean(impl *impl)
 359 {
 360         size_t i;
 361
 362         if (impl->decl->func->ptr != &impl->decl->func->val) {
 363                 efree(impl->decl->func->ptr);
 364                 impl->decl->func->ptr = &impl->decl->func->val;
 365         }
 366         for (i = 0; i < impl->func->args->count; ++i ) {
 367                 impl_arg *iarg = impl->func->args->args[i];
 368
 369                 switch (iarg->type->type) {
 370                 case PSI_T_STRING:
 371                         if (iarg->val.zend.str) {
 372                                 zend_string_release(iarg->val.zend.str);
 373                         }
 374                         break;
 375                 }
 376         }
 377
 378         if (impl->decl->args) for (i = 0; i < impl->decl->args->count; ++i) {
 379                 decl_arg *darg = impl->decl->args->args[i];
 380
 381                 if (darg->mem) {
 382                         psi_clean_array_struct(darg);
 383                         efree(darg->mem);
 384                         darg->mem = NULL;
 385                 }
 386                 darg->ptr = &darg->val;
 387         }
 388
 389         if (impl->func->args->vararg.args) {
 390                 free_impl_args(impl->func->args->vararg.args);
 391                 impl->func->args->vararg.args = NULL;
 392         }
 393         if (impl->func->args->vararg.types) {
 394                 efree(impl->func->args->vararg.types);
 395                 impl->func->args->vararg.types = NULL;
 396         }
 397         if (impl->func->args->vararg.values) {
 398                 efree(impl->func->args->vararg.values);
 399                 impl->func->args->vararg.values = NULL;
 400         }
 401         if (impl->func->args->vararg.free_list) {
 402                 void **list = impl->func->args->vararg.free_list;
 403
 404                 while (*list) {
 405                         efree(*list++);
 406                 }
 407
 408                 efree(impl->func->args->vararg.free_list);
 409                 impl->func->args->vararg.free_list = NULL;
 410         }
 411 }
 412
 413
 414 static inline void psi_do_args(impl *impl) {
 415         size_t i;
 416
 417         for (i = 0; i < impl->decl->args->count; ++i) {
 418                 impl->decl->call.args[i] = impl->decl->args->args[i]->let->ptr;
 419         }
 420
 421         if (!impl->decl->func->var->pointer_level) {
 422                 decl_type *real = real_decl_type(impl->decl->func->type);
 423
 424                 switch (real->type) {
 425                 case PSI_T_STRUCT:
 426                         impl->decl->func->ptr = psi_array_to_struct(real->strct, NULL);
 427                         break;
 428                 }
 429         }
 430 }
 431
 432 static inline impl_vararg *psi_do_varargs(impl *impl) {
 433         size_t i, j;
 434         impl_vararg *va = &impl->func->args->vararg;
 435         size_t vacount = va->args->count;
 436
 437
 438         if (!vacount) {
 439                 return NULL;
 440         }
 441
 442         va->types = ecalloc(vacount, sizeof(*va->types));
 443         va->values = ecalloc(vacount, sizeof(*va->values));
 444
 445         for (i = 0, j = 0; i < vacount; ++i) {
 446                 impl_arg *vaarg = va->args->args[i];
 447                 void *to_free = NULL;
 448                 token_t let_fn, vatype = va->name->type->type;
 449
 450                 if (vatype == PSI_T_MIXED) {
 451                         switch (Z_TYPE_P(vaarg->_zv)) {
 452                         case IS_TRUE:
 453                         case IS_FALSE:  vatype = PSI_T_BOOL;    break;
 454                         case IS_LONG:   vatype = PSI_T_INT;             break;
 455                         case IS_DOUBLE: vatype = PSI_T_FLOAT;   break;
 456                         default:                vatype = PSI_T_STRING;  break;
 457                         }
 458                 }
 459
 460
 461                 switch (vatype) {
 462                 case PSI_T_BOOL:        let_fn = PSI_T_BOOLVAL; break;
 463                 case PSI_T_INT:         let_fn = PSI_T_INTVAL;  break;
 464                 case PSI_T_FLOAT:
 465                 case PSI_T_DOUBLE:      let_fn = PSI_T_FLOATVAL;break;
 466                 case PSI_T_STRING:      let_fn = PSI_T_STRVAL;  break;
 467                 EMPTY_SWITCH_DEFAULT_CASE();
 468                 }
 469
 470                 va->types[i] = vatype;
 471                 /* FIXME: varargs with struct-by-value :) */
 472                 if (!psi_let_val(let_fn, vaarg, &va->values[i], NULL, &to_free)) {
 473                         return NULL;
 474                 }
 475
 476                 if (to_free) {
 477                         if (!va->free_list) {
 478                                 va->free_list = ecalloc(vacount - i + 1, sizeof(*va->free_list));
 479                         }
 480                         va->free_list[j++] = to_free;
 481                 }
 482         }
 483
 484         return va;
 485 }
 486
 487 void psi_call(zend_execute_data *execute_data, zval *return_value, impl *impl)
 488 {
 489         size_t i;
 490         impl_vararg *va = NULL;
 491
 492         memset(impl->decl->func->ptr, 0, sizeof(impl_val));
 493
 494         if (SUCCESS != psi_parse_args(execute_data, impl)) {
 495                 return;
 496         }
 497
 498         for (i = 0; i < impl->stmts->let.count; ++i) {
 499                 let_stmt *let = impl->stmts->let.list[i];
 500
 501                 if (!psi_do_let(let)) {
 502                         psi_do_return(return_value, impl->stmts->ret.list[0]);
 503                         psi_do_clean(impl);
 504                         return;
 505                 }
 506         }
 507
 508         if (impl->decl->args) {
 509                 psi_do_args(impl);
 510
 511                 if (impl->func->args->vararg.args) {
 512                         va = psi_do_varargs(impl);
 513                 }
 514         }
 515
 516         PSI_ContextCall(&PSI_G(context), &impl->decl->call, va);
 517         psi_do_return(return_value, impl->stmts->ret.list[0]);
 518
 519         for (i = 0; i < impl->stmts->set.count; ++i) {
 520                 set_stmt *set = impl->stmts->set.list[i];
 521
 522                 if (set->arg->_zv) {
 523                         psi_do_set(set->arg->_zv, set->val);
 524                 }
 525         }
 526
 527         for (i = 0; i < impl->stmts->fre.count; ++i) {
 528                 free_stmt *fre = impl->stmts->fre.list[i];
 529
 530                 psi_do_free(fre);
 531         }
 532         psi_do_clean(impl);
 533 }