Execute.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "Internal.hpp"
  23
  24 #include <dlfcn.h>
  25 #include <dirent.h>
  26 #include <fcntl.h>
  27 #include <unistd.h>
  28
  29 #include "cycript.hpp"
  30
  31 #include "sig/parse.hpp"
  32 #include "sig/ffi_type.hpp"
  33
  34 #include "Pooling.hpp"
  35 #include "Execute.hpp"
  36
  37 #include <sys/mman.h>
  38 #include <sys/stat.h>
  39
  40 #include <iostream>
  41 #include <set>
  42 #include <map>
  43 #include <iomanip>
  44 #include <sstream>
  45 #include <cmath>
  46
  47 #include "Code.hpp"
  48 #include "Decode.hpp"
  49 #include "Error.hpp"
  50 #include "JavaScript.hpp"
  51 #include "String.hpp"
  52
  53 static std::vector<CYHook *> &GetHooks() {
  54     static std::vector<CYHook *> hooks;
  55     return hooks;
  56 }
  57
  58 CYRegisterHook::CYRegisterHook(CYHook *hook) {
  59     GetHooks().push_back(hook);
  60 }
  61
  62 /* JavaScript Properties {{{ */
  63 bool CYHasProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  64     return JSObjectHasProperty(context, object, name);
  65 }
  66
  67 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  68     return _jsccall(JSObjectGetPropertyAtIndex, context, object, index);
  69 }
  70
  71 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  72     return _jsccall(JSObjectGetProperty, context, object, name);
  73 }
  74
  75 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  76     _jsccall(JSObjectSetPropertyAtIndex, context, object, index, value);
  77 }
  78
  79 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
  80     _jsccall(JSObjectSetProperty, context, object, name, value, attributes);
  81 }
  82
  83 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
  84     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
  85 }
  86
  87 void CYSetPrototype(JSContextRef context, JSObjectRef object, JSValueRef value) {
  88     JSObjectSetPrototype(context, object, value);
  89     _assert(CYIsStrictEqual(context, JSObjectGetPrototype(context, object), value));
  90 }
  91 /* }}} */
  92 /* JavaScript Strings {{{ */
  93 JSStringRef CYCopyJSString(const char *value) {
  94     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
  95 }
  96
  97 JSStringRef CYCopyJSString(JSStringRef value) {
  98     return value == NULL ? NULL : JSStringRetain(value);
  99 }
 100
 101 JSStringRef CYCopyJSString(CYUTF8String value) {
 102     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
 103     return CYCopyJSString(value.data);
 104 }
 105
 106 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 107     if (JSValueIsNull(context, value))
 108         return NULL;
 109     return _jsccall(JSValueToStringCopy, context, value);
 110 }
 111
 112 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 113     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 114 }
 115
 116 CYUTF8String CYPoolUTF8String(CYPool &pool, JSContextRef context, JSStringRef value) {
 117     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 118 }
 119
 120 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSStringRef value) {
 121     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 122     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 123     return utf8.data;
 124 }
 125
 126 const char *CYPoolCString(CYPool &pool, JSContextRef context, JSValueRef value) {
 127     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 128 }
 129 /* }}} */
 130 /* Index Offsets {{{ */
 131 size_t CYGetIndex(CYPool &pool, JSContextRef context, JSStringRef value) {
 132     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 133 }
 134 /* }}} */
 135
 136 static JSClassRef All_;
 137 static JSClassRef Context_;
 138 JSClassRef Functor_;
 139 static JSClassRef Global_;
 140 static JSClassRef Pointer_;
 141 static JSClassRef Struct_;
 142
 143 JSStringRef Array_s;
 144 JSStringRef cy_s;
 145 JSStringRef cyi_s;
 146 JSStringRef length_s;
 147 JSStringRef message_s;
 148 JSStringRef name_s;
 149 JSStringRef pop_s;
 150 JSStringRef prototype_s;
 151 JSStringRef push_s;
 152 JSStringRef splice_s;
 153 JSStringRef toCYON_s;
 154 JSStringRef toJSON_s;
 155 JSStringRef toPointer_s;
 156 JSStringRef toString_s;
 157 JSStringRef weak_s;
 158
 159 static JSStringRef Result_;
 160
 161 void CYFinalize(JSObjectRef object) {
 162     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 163     _assert(internal->count_ != _not(unsigned));
 164     if (--internal->count_ == 0)
 165         delete internal;
 166 }
 167
 168 void Structor_(CYPool &pool, sig::Type *&type) {
 169     if (
 170         type->primitive == sig::pointer_P &&
 171         type->data.data.type->primitive == sig::struct_P &&
 172         type->data.data.type->name != NULL &&
 173         strcmp(type->data.data.type->name, "_objc_class") == 0
 174     ) {
 175         type->primitive = sig::typename_P;
 176         type->data.data.type = NULL;
 177         return;
 178     }
 179
 180     if (type->primitive != sig::struct_P || type->name == NULL)
 181         return;
 182
 183     size_t length(strlen(type->name));
 184     char keyed[length + 2];
 185     memcpy(keyed + 1, type->name, length + 1);
 186
 187     static const char *modes = "34";
 188     for (size_t i(0); i != 2; ++i) {
 189         char mode(modes[i]);
 190         keyed[0] = mode;
 191
 192         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 193             switch (mode) {
 194                 case '3':
 195                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 196                 break;
 197
 198                 case '4': {
 199                     sig::Signature signature;
 200                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 201                     type = signature.elements[0].type;
 202                 } break;
 203             }
 204     }
 205 }
 206
 207 JSClassRef Type_privateData::Class_;
 208
 209 struct Context :
 210     CYData
 211 {
 212     JSGlobalContextRef context_;
 213
 214     Context(JSGlobalContextRef context) :
 215         context_(context)
 216     {
 217     }
 218 };
 219
 220 struct Pointer :
 221     CYOwned
 222 {
 223     Type_privateData *type_;
 224     size_t length_;
 225
 226     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 227         CYOwned(value, context, owner),
 228         type_(new(*pool_) Type_privateData(type)),
 229         length_(length)
 230     {
 231     }
 232 };
 233
 234 struct Struct_privateData :
 235     CYOwned
 236 {
 237     Type_privateData *type_;
 238
 239     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 240         CYOwned(NULL, context, owner)
 241     {
 242     }
 243 };
 244
 245 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 246     Struct_privateData *internal(new Struct_privateData(context, owner));
 247     CYPool &pool(*internal->pool_);
 248     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 249     internal->type_ = typical;
 250
 251     if (owner != NULL)
 252         internal->value_ = data;
 253     else {
 254         size_t size(typical->GetFFI()->size);
 255         void *copy(internal->pool_->malloc<void>(size));
 256         memcpy(copy, data, size);
 257         internal->value_ = copy;
 258     }
 259
 260     return JSObjectMake(context, Struct_, internal);
 261 }
 262
 263 static void *CYCastSymbol(const char *name) {
 264     for (CYHook *hook : GetHooks())
 265         if (hook->CastSymbol != NULL)
 266             if (void *value = (*hook->CastSymbol)(name))
 267                 return value;
 268     return dlsym(RTLD_DEFAULT, name);
 269 }
 270
 271 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 272     return JSValueMakeBoolean(context, value);
 273 }
 274
 275 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 276     return JSValueMakeNumber(context, value);
 277 }
 278
 279 #define CYCastJSValue_(Type_) \
 280     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 281         return JSValueMakeNumber(context, static_cast<double>(value)); \
 282     }
 283
 284 CYCastJSValue_(int)
 285 CYCastJSValue_(unsigned int)
 286 CYCastJSValue_(long int)
 287 CYCastJSValue_(long unsigned int)
 288 CYCastJSValue_(long long int)
 289 CYCastJSValue_(long long unsigned int)
 290
 291 JSValueRef CYJSUndefined(JSContextRef context) {
 292     return JSValueMakeUndefined(context);
 293 }
 294
 295 double CYCastDouble(JSContextRef context, JSValueRef value) {
 296     return _jsccall(JSValueToNumber, context, value);
 297 }
 298
 299 bool CYCastBool(JSContextRef context, JSValueRef value) {
 300     return JSValueToBoolean(context, value);
 301 }
 302
 303 JSValueRef CYJSNull(JSContextRef context) {
 304     return JSValueMakeNull(context);
 305 }
 306
 307 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 308     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 309 }
 310
 311 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 312     return CYCastJSValue(context, CYJSString(value));
 313 }
 314
 315 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 316     return _jsccall(JSValueToObject, context, value);
 317 }
 318
 319 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 320     return _jsccall(JSObjectCallAsFunction, context, function, _this, count, arguments);
 321 }
 322
 323 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 324     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 325 }
 326
 327 bool CYIsEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 328     return _jsccall(JSValueIsEqual, context, lhs, rhs);
 329 }
 330
 331 bool CYIsStrictEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 332     return JSValueIsStrictEqual(context, lhs, rhs);
 333 }
 334
 335 size_t CYArrayLength(JSContextRef context, JSObjectRef array) {
 336     return CYCastDouble(context, CYGetProperty(context, array, length_s));
 337 }
 338
 339 JSValueRef CYArrayGet(JSContextRef context, JSObjectRef array, size_t index) {
 340     return _jsccall(JSObjectGetPropertyAtIndex, context, array, index);
 341 }
 342
 343 void CYArrayPush(JSContextRef context, JSObjectRef array, JSValueRef value) {
 344     JSValueRef arguments[1];
 345     arguments[0] = value;
 346     JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
 347     _jsccall(JSObjectCallAsFunction, context, CYCastJSObject(context, CYGetProperty(context, Array, push_s)), array, 1, arguments);
 348 }
 349
 350 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 351     if (count == 0)
 352         printf("\n");
 353     else {
 354         CYPool pool;
 355         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 356     }
 357
 358     return CYJSUndefined(context);
 359 } CYCatch(NULL) }
 360
 361 static void (*JSSynchronousGarbageCollectForDebugging$)(JSContextRef);
 362
 363 _visible void CYGarbageCollect(JSContextRef context) {
 364     (JSSynchronousGarbageCollectForDebugging$ ?: &JSGarbageCollect)(context);
 365 }
 366
 367 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 368     CYGarbageCollect(context);
 369     return CYJSUndefined(context);
 370 } CYCatch(NULL) }
 371
 372 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects, JSValueRef *exception) { CYTry {
 373     switch (JSType type = JSValueGetType(context, value)) {
 374         case kJSTypeUndefined:
 375             return "undefined";
 376         case kJSTypeNull:
 377             return "null";
 378         case kJSTypeBoolean:
 379             return CYCastBool(context, value) ? "true" : "false";
 380
 381         case kJSTypeNumber: {
 382             std::ostringstream str;
 383             CYNumerify(str, CYCastDouble(context, value));
 384             std::string value(str.str());
 385             return pool.strmemdup(value.c_str(), value.size());
 386         } break;
 387
 388         case kJSTypeString: {
 389             std::ostringstream str;
 390             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 391             CYStringify(str, string.data, string.size);
 392             std::string value(str.str());
 393             return pool.strmemdup(value.c_str(), value.size());
 394         } break;
 395
 396         case kJSTypeObject:
 397             return CYPoolCCYON(pool, context, (JSObjectRef) value, objects);
 398         default:
 399             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 400     }
 401 } CYCatch(NULL) }
 402
 403 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects) {
 404     return _jsccall(CYPoolCCYON, pool, context, value, objects);
 405 }
 406
 407 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> *objects) {
 408     if (objects != NULL)
 409         return CYPoolCCYON(pool, context, value, *objects);
 410     else {
 411         std::set<void *> objects;
 412         return CYPoolCCYON(pool, context, value, objects);
 413     }
 414 }
 415
 416 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSObjectRef object, std::set<void *> &objects) {
 417     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 418     if (CYIsCallable(context, toCYON)) {
 419         // XXX: this needs to be abstracted behind some kind of function
 420         JSValueRef arguments[1] = {CYCastJSValue(context, reinterpret_cast<uintptr_t>(&objects))};
 421         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 1, arguments));
 422         _assert(value != NULL);
 423         return CYPoolCString(pool, context, value);
 424     }
 425
 426     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 427     if (CYIsCallable(context, toJSON)) {
 428         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 429         return _jsccall(CYPoolCCYON, pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), objects);
 430     }
 431
 432     if (JSObjectIsFunction(context, object)) {
 433         JSValueRef toString(CYGetProperty(context, object, toString_s));
 434         if (CYIsCallable(context, toString)) {
 435             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 436             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 437             _assert(value != NULL);
 438             return CYPoolCString(pool, context, value);
 439         }
 440     }
 441
 442     _assert(objects.insert(object).second);
 443
 444     std::ostringstream str;
 445
 446     str << '{';
 447
 448     // XXX: this is, sadly, going to leak
 449     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 450
 451     bool comma(false);
 452
 453     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 454         if (comma)
 455             str << ',';
 456         else
 457             comma = true;
 458
 459         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 460         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 461
 462         if (CYIsKey(string))
 463             str << string.data;
 464         else
 465             CYStringify(str, string.data, string.size);
 466
 467         str << ':';
 468
 469         try {
 470             JSValueRef value(CYGetProperty(context, object, name));
 471             str << CYPoolCCYON(pool, context, value, objects);
 472         } catch (const CYException &error) {
 473             str << "@error";
 474         }
 475     }
 476
 477     JSPropertyNameArrayRelease(names);
 478
 479     str << '}';
 480
 481     std::string string(str.str());
 482     return pool.strmemdup(string.c_str(), string.size());
 483 }
 484
 485 std::set<void *> *CYCastObjects(JSContextRef context, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 486     if (count == 0)
 487         return NULL;
 488     return CYCastPointer<std::set<void *> *>(context, arguments[0]);
 489 }
 490
 491 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 492     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
 493     // XXX: this is horribly inefficient
 494     std::set<void *> backup;
 495     if (objects == NULL)
 496         objects = &backup;
 497
 498     CYPool pool;
 499     std::ostringstream str;
 500
 501     str << '[';
 502
 503     JSValueRef length(CYGetProperty(context, _this, length_s));
 504     bool comma(false);
 505
 506     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 507         if (comma)
 508             str << ',';
 509         else
 510             comma = true;
 511
 512         try {
 513             JSValueRef value(CYGetProperty(context, _this, index));
 514             if (!JSValueIsUndefined(context, value))
 515                 str << CYPoolCCYON(pool, context, value, *objects);
 516             else {
 517                 str << ',';
 518                 comma = false;
 519             }
 520         } catch (const CYException &error) {
 521             str << "@error";
 522         }
 523     }
 524
 525     str << ']';
 526
 527     std::string value(str.str());
 528     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 529 } CYCatch(NULL) }
 530
 531 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 532     CYPool pool;
 533     std::ostringstream str;
 534
 535     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 536     CYStringify(str, string.data, string.size);
 537
 538     std::string value(str.str());
 539     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 540 } CYCatch(NULL) }
 541
 542 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 543     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 544     return JSObjectMake(context, Pointer_, internal);
 545 }
 546
 547 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const sig::Signature &signature) {
 548     return JSObjectMake(context, Functor_, new cy::Functor(signature, function));
 549 }
 550
 551 static JSObjectRef CYMakeFunctor(JSContextRef context, const char *symbol, const char *encoding, void **cache) {
 552     cy::Functor *internal;
 553     if (*cache != NULL)
 554         internal = reinterpret_cast<cy::Functor *>(*cache);
 555     else {
 556         void (*function)()(reinterpret_cast<void (*)()>(CYCastSymbol(symbol)));
 557         if (function == NULL)
 558             return NULL;
 559
 560         internal = new cy::Functor(encoding, function);
 561         *cache = internal;
 562     }
 563
 564     ++internal->count_;
 565     return JSObjectMake(context, Functor_, internal);
 566 }
 567
 568 static bool CYGetOffset(CYPool &pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 569     return CYGetOffset(CYPoolCString(pool, context, value), index);
 570 }
 571
 572 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 573     if (value == NULL)
 574         return NULL;
 575     else switch (JSValueGetType(context, value)) {
 576         case kJSTypeNull:
 577             return NULL;
 578         case kJSTypeObject: {
 579             JSObjectRef object((JSObjectRef) value);
 580             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 581                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 582                 return internal->value_;
 583             }
 584             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 585             if (CYIsCallable(context, toPointer)) {
 586                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 587                 _assert(value != NULL);
 588                 return CYCastPointer_(context, value);
 589             }
 590         } default:
 591             double number(CYCastDouble(context, value));
 592             if (std::isnan(number))
 593                 throw CYJSError(context, "cannot convert value to pointer");
 594             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 595     }
 596 }
 597
 598 void CYPoolFFI(CYPool *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 599     switch (type->primitive) {
 600         case sig::boolean_P:
 601             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 602         break;
 603
 604 #define CYPoolFFI_(primitive, native) \
 605         case sig::primitive ## _P: \
 606             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 607         break;
 608
 609         CYPoolFFI_(uchar, unsigned char)
 610         CYPoolFFI_(char, char)
 611         CYPoolFFI_(ushort, unsigned short)
 612         CYPoolFFI_(short, short)
 613         CYPoolFFI_(ulong, unsigned long)
 614         CYPoolFFI_(long, long)
 615         CYPoolFFI_(uint, unsigned int)
 616         CYPoolFFI_(int, int)
 617         CYPoolFFI_(ulonglong, unsigned long long)
 618         CYPoolFFI_(longlong, long long)
 619         CYPoolFFI_(float, float)
 620         CYPoolFFI_(double, double)
 621
 622         case sig::array_P: {
 623             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 624             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 625             for (size_t index(0); index != type->data.data.size; ++index) {
 626                 ffi_type *field(ffi->elements[index]);
 627
 628                 JSValueRef rhs;
 629                 if (aggregate == NULL)
 630                     rhs = value;
 631                 else {
 632                     rhs = CYGetProperty(context, aggregate, index);
 633                     if (JSValueIsUndefined(context, rhs))
 634                         throw CYJSError(context, "unable to extract array value");
 635                 }
 636
 637                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 638                 // XXX: alignment?
 639                 base += field->size;
 640             }
 641         } break;
 642
 643         case sig::pointer_P:
 644             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 645         break;
 646
 647         case sig::string_P:
 648             _assert(pool != NULL);
 649             *reinterpret_cast<const char **>(data) = CYPoolCString(*pool, context, value);
 650         break;
 651
 652         case sig::struct_P: {
 653             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 654             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 655             for (size_t index(0); index != type->data.signature.count; ++index) {
 656                 sig::Element *element(&type->data.signature.elements[index]);
 657                 ffi_type *field(ffi->elements[index]);
 658
 659                 JSValueRef rhs;
 660                 if (aggregate == NULL)
 661                     rhs = value;
 662                 else {
 663                     rhs = CYGetProperty(context, aggregate, index);
 664                     if (JSValueIsUndefined(context, rhs)) {
 665                         if (element->name != NULL)
 666                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 667                         else
 668                             goto undefined;
 669                         if (JSValueIsUndefined(context, rhs)) undefined:
 670                             throw CYJSError(context, "unable to extract structure value");
 671                     }
 672                 }
 673
 674                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 675                 // XXX: alignment?
 676                 base += field->size;
 677             }
 678         } break;
 679
 680         case sig::void_P:
 681         break;
 682
 683         default:
 684             for (CYHook *hook : GetHooks())
 685                 if (hook->PoolFFI != NULL)
 686                     if ((*hook->PoolFFI)(pool, context, type, ffi, data, value))
 687                         return;
 688
 689             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 690     }
 691 }
 692
 693 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 694     switch (type->primitive) {
 695         case sig::boolean_P:
 696             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 697
 698 #define CYFromFFI_(primitive, native) \
 699         case sig::primitive ## _P: \
 700             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 701
 702         CYFromFFI_(uchar, unsigned char)
 703         CYFromFFI_(char, char)
 704         CYFromFFI_(ushort, unsigned short)
 705         CYFromFFI_(short, short)
 706         CYFromFFI_(ulong, unsigned long)
 707         CYFromFFI_(long, long)
 708         CYFromFFI_(uint, unsigned int)
 709         CYFromFFI_(int, int)
 710         CYFromFFI_(ulonglong, unsigned long long)
 711         CYFromFFI_(longlong, long long)
 712         CYFromFFI_(float, float)
 713         CYFromFFI_(double, double)
 714
 715         case sig::array_P:
 716             if (void *pointer = data)
 717                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 718             else goto null;
 719
 720         case sig::pointer_P:
 721             if (void *pointer = *reinterpret_cast<void **>(data))
 722                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 723             else goto null;
 724
 725         case sig::string_P:
 726             if (char *utf8 = *reinterpret_cast<char **>(data))
 727                 return CYCastJSValue(context, utf8);
 728             else goto null;
 729
 730         case sig::struct_P:
 731             return CYMakeStruct(context, data, type, ffi, owner);
 732         case sig::void_P:
 733             return CYJSUndefined(context);
 734
 735         null:
 736             return CYJSNull(context);
 737         default:
 738             for (CYHook *hook : GetHooks())
 739                 if (hook->FromFFI != NULL)
 740                     if (JSValueRef value = (*hook->FromFFI)(context, type, ffi, data, initialize, owner))
 741                         return value;
 742
 743             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 744     }
 745 }
 746
 747 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg) {
 748     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 749
 750     JSContextRef context(internal->context_);
 751
 752     size_t count(internal->cif_.nargs);
 753     JSValueRef values[count];
 754
 755     for (size_t index(0); index != count; ++index)
 756         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 757
 758     JSValueRef value(internal->adapter_(context, count, values, internal->function_));
 759     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 760 }
 761
 762 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 763     return CYCallAsFunction(context, function, NULL, count, values);
 764 }
 765
 766 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const sig::Signature &signature, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 767     // XXX: in case of exceptions this will leak
 768     // XXX: in point of fact, this may /need/ to leak :(
 769     Closure_privateData *internal(new Closure_privateData(context, function, adapter, signature));
 770
 771 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 772     void *executable;
 773     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 774
 775     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, &CYExecuteClosure, internal, executable));
 776     _assert(status == FFI_OK);
 777
 778     internal->value_ = executable;
 779 #else
 780     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 781         NULL, sizeof(ffi_closure),
 782         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 783         -1, 0
 784     )));
 785
 786     ffi_status status(ffi_prep_closure(closure, &internal->cif_, &CYExecuteClosure, internal));
 787     _assert(status == FFI_OK);
 788
 789     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 790
 791     internal->value_ = closure;
 792 #endif
 793
 794     return internal;
 795 }
 796
 797 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const sig::Signature &signature) {
 798     Closure_privateData *internal(CYMakeFunctor_(context, function, signature, &FunctionAdapter_));
 799     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 800     // XXX: see above notes about needing to leak
 801     JSValueProtect(CYGetJSContext(context), object);
 802     return object;
 803 }
 804
 805 JSValueRef CYGetCachedValue(JSContextRef context, JSStringRef name) {
 806     return CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name);
 807 }
 808
 809 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 810     return CYCastJSObject(context, CYGetCachedValue(context, name));
 811 }
 812
 813 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const sig::Signature &signature) {
 814     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 815
 816     bool function(_jsccall(JSValueIsInstanceOfConstructor, context, value, Function));
 817     if (function) {
 818         JSObjectRef function(CYCastJSObject(context, value));
 819         return CYMakeFunctor(context, function, signature);
 820     } else {
 821         void (*function)()(CYCastPointer<void (*)()>(context, value));
 822         return CYMakeFunctor(context, function, signature);
 823     }
 824 }
 825
 826 static bool Index_(CYPool &pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 827     Type_privateData *typical(internal->type_);
 828     sig::Type *type(typical->type_);
 829     if (type == NULL)
 830         return false;
 831
 832     const char *name(CYPoolCString(pool, context, property));
 833     size_t length(strlen(name));
 834     double number(CYCastDouble(name, length));
 835
 836     size_t count(type->data.signature.count);
 837
 838     if (std::isnan(number)) {
 839         if (property == NULL)
 840             return false;
 841
 842         sig::Element *elements(type->data.signature.elements);
 843
 844         for (size_t local(0); local != count; ++local) {
 845             sig::Element *element(&elements[local]);
 846             if (element->name != NULL && strcmp(name, element->name) == 0) {
 847                 index = local;
 848                 goto base;
 849             }
 850         }
 851
 852         return false;
 853     } else {
 854         index = static_cast<ssize_t>(number);
 855         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 856             return false;
 857     }
 858
 859   base:
 860     ffi_type **elements(typical->GetFFI()->elements);
 861
 862     base = reinterpret_cast<uint8_t *>(internal->value_);
 863     for (ssize_t local(0); local != index; ++local)
 864         base += elements[local]->size;
 865
 866     return true;
 867 }
 868
 869 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 870     CYPool pool;
 871     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 872
 873     if (JSStringIsEqual(property, length_s))
 874         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 875
 876     Type_privateData *typical(internal->type_);
 877     if (typical->type_ == NULL)
 878         return NULL;
 879     sig::Type &type(*typical->type_);
 880
 881     ssize_t offset;
 882     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 883         offset = 0;
 884     else if (!CYGetOffset(pool, context, property, offset))
 885         return NULL;
 886
 887     if (type.primitive == sig::function_P)
 888         return CYMakeFunctor(context, reinterpret_cast<void (*)()>(internal->value_), type.data.signature);
 889
 890     ffi_type *ffi(typical->GetFFI());
 891
 892     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 893     base += ffi->size * offset;
 894
 895     JSObjectRef owner(internal->GetOwner() ?: object);
 896     return CYFromFFI(context, &type, ffi, base, false, owner);
 897 } CYCatch(NULL) }
 898
 899 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 900     CYPool pool;
 901     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 902     Type_privateData *typical(internal->type_);
 903
 904     if (typical->type_ == NULL)
 905         return false;
 906
 907     ssize_t offset;
 908     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 909         offset = 0;
 910     else if (!CYGetOffset(pool, context, property, offset))
 911         return false;
 912
 913     ffi_type *ffi(typical->GetFFI());
 914
 915     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 916     base += ffi->size * offset;
 917
 918     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 919     return true;
 920 } CYCatch(false) }
 921
 922 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 923     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 924     Type_privateData *typical(internal->type_);
 925     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 926 } CYCatch(NULL) }
 927
 928 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 929     CYPool pool;
 930     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 931     Type_privateData *typical(internal->type_);
 932
 933     ssize_t index;
 934     uint8_t *base;
 935
 936     if (!Index_(pool, context, internal, property, index, base))
 937         return NULL;
 938
 939     JSObjectRef owner(internal->GetOwner() ?: object);
 940
 941     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 942 } CYCatch(NULL) }
 943
 944 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 945     CYPool pool;
 946     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 947     Type_privateData *typical(internal->type_);
 948
 949     ssize_t index;
 950     uint8_t *base;
 951
 952     if (!Index_(pool, context, internal, property, index, base))
 953         return false;
 954
 955     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 956     return true;
 957 } CYCatch(false) }
 958
 959 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 960     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 961     Type_privateData *typical(internal->type_);
 962     sig::Type *type(typical->type_);
 963
 964     if (type == NULL)
 965         return;
 966
 967     size_t count(type->data.signature.count);
 968     sig::Element *elements(type->data.signature.elements);
 969
 970     char number[32];
 971
 972     for (size_t index(0); index != count; ++index) {
 973         const char *name;
 974         name = elements[index].name;
 975
 976         if (name == NULL) {
 977             sprintf(number, "%zu", index);
 978             name = number;
 979         }
 980
 981         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 982     }
 983 }
 984
 985 void CYCallFunction(CYPool &pool, JSContextRef context, ffi_cif *cif, void (*function)(), void *value, void **values) {
 986     ffi_call(cif, function, value, values);
 987 }
 988
 989 JSValueRef CYCallFunction(CYPool &pool, JSContextRef context, size_t setups, void *setup[], size_t count, const JSValueRef arguments[], bool initialize, sig::Signature *signature, ffi_cif *cif, void (*function)()) {
 990     if (setups + count != signature->count - 1)
 991         throw CYJSError(context, "incorrect number of arguments to ffi function");
 992
 993     size_t size(setups + count);
 994     void *values[size];
 995     memcpy(values, setup, sizeof(void *) * setups);
 996
 997     for (size_t index(setups); index != size; ++index) {
 998         sig::Element *element(&signature->elements[index + 1]);
 999         ffi_type *ffi(cif->arg_types[index]);
1000         // XXX: alignment?
1001         values[index] = new(pool) uint8_t[ffi->size];
1002         CYPoolFFI(&pool, context, element->type, ffi, values[index], arguments[index - setups]);
1003     }
1004
1005     uint8_t value[cif->rtype->size];
1006
1007     void (*call)(CYPool &, JSContextRef, ffi_cif *, void (*)(), void *, void **) = &CYCallFunction;
1008     // XXX: this only supports one hook, but it is a bad idea anyway
1009     for (CYHook *hook : GetHooks())
1010         if (hook->CallFunction != NULL)
1011             call = hook->CallFunction;
1012
1013     call(pool, context, cif, function, value, values);
1014     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1015 }
1016
1017 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1018     CYPool pool;
1019     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1020     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, &internal->signature_, &internal->cif_, internal->GetValue());
1021 } CYCatch(NULL) }
1022
1023 JSObjectRef CYMakeType(JSContextRef context, const char *encoding) {
1024     Type_privateData *internal(new Type_privateData(encoding));
1025     return JSObjectMake(context, Type_privateData::Class_, internal);
1026 }
1027
1028 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1029     Type_privateData *internal(new Type_privateData(type));
1030     return JSObjectMake(context, Type_privateData::Class_, internal);
1031 }
1032
1033 JSObjectRef CYMakeType(JSContextRef context, sig::Signature *signature) {
1034     CYPool pool;
1035
1036     sig::Type type;
1037     type.name = NULL;
1038     type.flags = 0;
1039
1040     type.primitive = sig::function_P;
1041     sig::Copy(pool, type.data.signature, *signature);
1042
1043     return CYMakeType(context, &type);
1044 }
1045
1046 static bool All_hasProperty(JSContextRef context, JSObjectRef object, JSStringRef property) {
1047     JSObjectRef global(CYGetGlobalObject(context));
1048     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1049     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1050
1051     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1052         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1053             if (CYHasProperty(context, space, property))
1054                 return true;
1055
1056     CYPool pool;
1057     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1058
1059     size_t length(name.size);
1060     char keyed[length + 2];
1061     memcpy(keyed + 1, name.data, length + 1);
1062
1063     static const char *modes = "0124";
1064     for (size_t i(0); i != 4; ++i) {
1065         keyed[0] = modes[i];
1066         if (CYBridgeHash(keyed, length + 1) != NULL)
1067             return true;
1068     }
1069
1070     return false;
1071 }
1072
1073 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1074     JSObjectRef global(CYGetGlobalObject(context));
1075     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1076     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1077
1078     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1079         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1080             if (JSValueRef value = CYGetProperty(context, space, property))
1081                 if (!JSValueIsUndefined(context, value))
1082                     return value;
1083
1084     CYPool pool;
1085     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1086
1087     size_t length(name.size);
1088     char keyed[length + 2];
1089     memcpy(keyed + 1, name.data, length + 1);
1090
1091     static const char *modes = "0124";
1092     for (size_t i(0); i != 4; ++i) {
1093         char mode(modes[i]);
1094         keyed[0] = mode;
1095
1096         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
1097             switch (mode) {
1098                 case '0':
1099                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
1100
1101                 case '1':
1102                     return CYMakeFunctor(context, name.data, entry->value_, &entry->cache_);
1103
1104                 case '2':
1105                     if (void *symbol = CYCastSymbol(name.data)) {
1106                         // XXX: this is horrendously inefficient
1107                         sig::Signature signature;
1108                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1109                         ffi_cif cif;
1110                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1111                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1112                     } else return NULL;
1113
1114                 // XXX: implement case 3
1115                 case '4':
1116                     return CYMakeType(context, entry->value_);
1117             }
1118     }
1119
1120     return NULL;
1121 } CYCatch(NULL) }
1122
1123 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1124     JSObjectRef global(CYGetGlobalObject(context));
1125     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1126     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1127
1128     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1129         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1130             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1131             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1132                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1133             JSPropertyNameArrayRelease(subset);
1134         }
1135 }
1136
1137 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1138     if (count != 2)
1139         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1140
1141     CYPool pool;
1142
1143     void *value(CYCastPointer<void *>(context, arguments[0]));
1144     const char *type(CYPoolCString(pool, context, arguments[1]));
1145
1146     sig::Signature signature;
1147     sig::Parse(pool, &signature, type, &Structor_);
1148
1149     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1150 } CYCatch(NULL) }
1151
1152 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1153     if (count != 1)
1154         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1155     CYPool pool;
1156     const char *type(CYPoolCString(pool, context, arguments[0]));
1157     return CYMakeType(context, type);
1158 } CYCatch(NULL) }
1159
1160 static JSValueRef Type_callAsFunction_$With(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], sig::Primitive primitive, JSValueRef *exception) { CYTry {
1161     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1162
1163     CYPool pool;
1164
1165     sig::Type type;
1166     type.name = NULL;
1167     type.flags = 0;
1168
1169     type.primitive = primitive;
1170     type.data.signature.elements = new(pool) sig::Element[1 + count];
1171     type.data.signature.count = 1 + count;
1172
1173     type.data.signature.elements[0].name = NULL;
1174     type.data.signature.elements[0].type = internal->type_;
1175     type.data.signature.elements[0].offset = _not(size_t);
1176
1177     for (size_t i(0); i != count; ++i) {
1178         sig::Element &element(type.data.signature.elements[i + 1]);
1179         element.name = NULL;
1180         element.offset = _not(size_t);
1181
1182         JSObjectRef object(CYCastJSObject(context, arguments[i]));
1183         _assert(JSValueIsObjectOfClass(context, object, Type_privateData::Class_));
1184         Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1185
1186         element.type = internal->type_;
1187     }
1188
1189     return CYMakeType(context, &type);
1190 } CYCatch(NULL) }
1191
1192 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1193     if (count != 1)
1194         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1195     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1196
1197     CYPool pool;
1198     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1199     if (index == _not(size_t))
1200         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1201
1202     sig::Type type;
1203     type.name = NULL;
1204     type.flags = 0;
1205
1206     type.primitive = sig::array_P;
1207     type.data.data.type = internal->type_;
1208     type.data.data.size = index;
1209
1210     return CYMakeType(context, &type);
1211 } CYCatch(NULL) }
1212
1213 static JSValueRef Type_callAsFunction_blockWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1214     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::block_P, exception);
1215 }
1216
1217 static JSValueRef Type_callAsFunction_constant(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1218     if (count != 0)
1219         throw CYJSError(context, "incorrect number of arguments to Type.constant");
1220     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1221
1222     sig::Type type(*internal->type_);
1223     type.flags |= JOC_TYPE_CONST;
1224     return CYMakeType(context, &type);
1225 } CYCatch(NULL) }
1226
1227 static JSValueRef Type_callAsFunction_long(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1228     if (count != 0)
1229         throw CYJSError(context, "incorrect number of arguments to Type.long");
1230     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1231
1232     sig::Type type(*internal->type_);
1233
1234     switch (type.primitive) {
1235         case sig::short_P: type.primitive = sig::int_P; break;
1236         case sig::int_P: type.primitive = sig::long_P; break;
1237         case sig::long_P: type.primitive = sig::longlong_P; break;
1238         default: throw CYJSError(context, "invalid type argument to Type.long");
1239     }
1240
1241     return CYMakeType(context, &type);
1242 } CYCatch(NULL) }
1243
1244 static JSValueRef Type_callAsFunction_short(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1245     if (count != 0)
1246         throw CYJSError(context, "incorrect number of arguments to Type.short");
1247     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1248
1249     sig::Type type(*internal->type_);
1250
1251     switch (type.primitive) {
1252         case sig::int_P: type.primitive = sig::short_P; break;
1253         case sig::long_P: type.primitive = sig::int_P; break;
1254         case sig::longlong_P: type.primitive = sig::long_P; break;
1255         default: throw CYJSError(context, "invalid type argument to Type.short");
1256     }
1257
1258     return CYMakeType(context, &type);
1259 } CYCatch(NULL) }
1260
1261 static JSValueRef Type_callAsFunction_signed(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1262     if (count != 0)
1263         throw CYJSError(context, "incorrect number of arguments to Type.signed");
1264     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1265
1266     sig::Type type(*internal->type_);
1267
1268     switch (type.primitive) {
1269         case sig::char_P: case sig::uchar_P: type.primitive = sig::char_P; break;
1270         case sig::short_P: case sig::ushort_P: type.primitive = sig::short_P; break;
1271         case sig::int_P: case sig::uint_P: type.primitive = sig::int_P; break;
1272         case sig::long_P: case sig::ulong_P: type.primitive = sig::long_P; break;
1273         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::longlong_P; break;
1274         default: throw CYJSError(context, "invalid type argument to Type.signed");
1275     }
1276
1277     return CYMakeType(context, &type);
1278 } CYCatch(NULL) }
1279
1280 static JSValueRef Type_callAsFunction_unsigned(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1281     if (count != 0)
1282         throw CYJSError(context, "incorrect number of arguments to Type.unsigned");
1283     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1284
1285     sig::Type type(*internal->type_);
1286
1287     switch (type.primitive) {
1288         case sig::char_P: case sig::uchar_P: type.primitive = sig::uchar_P; break;
1289         case sig::short_P: case sig::ushort_P: type.primitive = sig::ushort_P; break;
1290         case sig::int_P: case sig::uint_P: type.primitive = sig::uint_P; break;
1291         case sig::long_P: case sig::ulong_P: type.primitive = sig::ulong_P; break;
1292         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::ulonglong_P; break;
1293         default: throw CYJSError(context, "invalid type argument to Type.unsigned");
1294     }
1295
1296     return CYMakeType(context, &type);
1297 } CYCatch(NULL) }
1298
1299 static JSValueRef Type_callAsFunction_functionWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1300     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::function_P, exception);
1301 }
1302
1303 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1304     if (count != 0)
1305         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1306     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1307
1308     sig::Type type;
1309     type.name = NULL;
1310
1311     if (internal->type_->primitive == sig::char_P) {
1312         type.flags = internal->type_->flags;
1313         type.primitive = sig::string_P;
1314         type.data.data.type = NULL;
1315         type.data.data.size = 0;
1316     } else {
1317         type.flags = 0;
1318         type.primitive = sig::pointer_P;
1319         type.data.data.type = internal->type_;
1320         type.data.data.size = 0;
1321     }
1322
1323     return CYMakeType(context, &type);
1324 } CYCatch(NULL) }
1325
1326 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1327     if (count != 1)
1328         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1329     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1330
1331     CYPool pool;
1332     const char *name(CYPoolCString(pool, context, arguments[0]));
1333
1334     sig::Type type(*internal->type_);
1335     type.name = name;
1336     return CYMakeType(context, &type);
1337 } CYCatch(NULL) }
1338
1339 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1340     if (count != 1)
1341         throw CYJSError(context, "incorrect number of arguments to type cast function");
1342     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1343
1344     if (internal->type_->primitive == sig::function_P)
1345         return CYMakeFunctor(context, arguments[0], internal->type_->data.signature);
1346
1347     sig::Type *type(internal->type_);
1348     ffi_type *ffi(internal->GetFFI());
1349     // XXX: alignment?
1350     uint8_t value[ffi->size];
1351     CYPool pool;
1352     CYPoolFFI(&pool, context, type, ffi, value, arguments[0]);
1353     return CYFromFFI(context, type, ffi, value);
1354 } CYCatch(NULL) }
1355
1356 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1357     if (count != 0)
1358         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1359     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1360
1361     sig::Type *type(internal->type_);
1362     size_t length;
1363
1364     if (type->primitive != sig::array_P)
1365         length = _not(size_t);
1366     else {
1367         length = type->data.data.size;
1368         type = type->data.data.type;
1369     }
1370
1371     void *value(calloc(1, internal->GetFFI()->size));
1372     return CYMakePointer(context, value, length, type, NULL, NULL);
1373 } CYCatch(NULL) }
1374
1375 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1376     if (count != 2)
1377         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1378     CYPool pool;
1379     const char *encoding(CYPoolCString(pool, context, arguments[1]));
1380     sig::Signature signature;
1381     sig::Parse(pool, &signature, encoding, &Structor_);
1382     return CYMakeFunctor(context, arguments[0], signature);
1383 } CYCatch(NULL) }
1384
1385 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1386     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1387     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1388 } CYCatch(NULL) }
1389
1390 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1391     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1392 }
1393
1394 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1395     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1396     char string[32];
1397     sprintf(string, "%p", internal->value_);
1398     return CYCastJSValue(context, string);
1399 } CYCatch(NULL) }
1400
1401 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1402     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
1403
1404     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1405     if (internal->length_ != _not(size_t)) {
1406         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
1407         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1408         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1409     } else if (internal->type_->type_ == NULL) pointer: {
1410         char string[32];
1411         sprintf(string, "%p", internal->value_);
1412         return CYCastJSValue(context, string);
1413     } try {
1414         JSValueRef value(CYGetProperty(context, _this, cyi_s));
1415         if (JSValueIsUndefined(context, value))
1416             goto pointer;
1417         CYPool pool;
1418         return CYCastJSValue(context, pool.strcat("&", CYPoolCCYON(pool, context, value, objects), NULL));
1419     } catch (const CYException &e) {
1420         goto pointer;
1421     }
1422 } CYCatch(NULL) }
1423
1424 static JSValueRef Pointer_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1425     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
1426     return CYMakeType(context, internal->type_->type_);
1427 } CYCatch(NULL) }
1428
1429 static JSValueRef Functor_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1430     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1431     return CYMakeType(context, &internal->signature_);
1432 } CYCatch(NULL) }
1433
1434 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1435     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1436     return CYCastJSValue(context, internal->GetFFI()->alignment);
1437 } CYCatch(NULL) }
1438
1439 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1440     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1441     return CYCastJSValue(context, internal->type_->name);
1442 } CYCatch(NULL) }
1443
1444 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1445     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1446     return CYCastJSValue(context, internal->GetFFI()->size);
1447 } CYCatch(NULL) }
1448
1449 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1450     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1451     CYPool pool;
1452     const char *type(sig::Unparse(pool, internal->type_));
1453     return CYCastJSValue(context, CYJSString(type));
1454 } CYCatch(NULL) }
1455
1456 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1457     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1458     CYLocalPool pool;
1459     std::stringbuf out;
1460     CYOptions options;
1461     CYOutput output(out, options);
1462     (new(pool) CYEncodedType(Decode(pool, internal->type_)))->Output(output, CYNoFlags);
1463     return CYCastJSValue(context, CYJSString(out.str().c_str()));
1464 } CYCatch(NULL) }
1465
1466 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1467     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1468 }
1469
1470 static JSStaticFunction Pointer_staticFunctions[4] = {
1471     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1472     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1473     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1474     {NULL, NULL, 0}
1475 };
1476
1477 static JSStaticValue Pointer_staticValues[2] = {
1478     {"type", &Pointer_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1479     {NULL, NULL, NULL, 0}
1480 };
1481
1482 static JSStaticFunction Struct_staticFunctions[2] = {
1483     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1484     {NULL, NULL, 0}
1485 };
1486
1487 static JSStaticFunction Functor_staticFunctions[4] = {
1488     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1489     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1490     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1491     {NULL, NULL, 0}
1492 };
1493
1494 namespace cy {
1495     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1496 }
1497
1498 static JSStaticValue Functor_staticValues[2] = {
1499     {"type", &Functor_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1500     {NULL, NULL, NULL, 0}
1501 };
1502
1503 namespace cy {
1504     JSStaticValue const * const Functor::StaticValues = Functor_staticValues;
1505 }
1506
1507 static JSStaticValue Type_staticValues[4] = {
1508     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1509     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1510     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1511     {NULL, NULL, NULL, 0}
1512 };
1513
1514 static JSStaticFunction Type_staticFunctions[14] = {
1515     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1516     {"blockWith", &Type_callAsFunction_blockWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1517     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1518     {"functionWith", &Type_callAsFunction_functionWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1519     {"long", &Type_callAsFunction_long, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1520     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1521     {"short", &Type_callAsFunction_short, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1522     {"signed", &Type_callAsFunction_signed, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1523     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1524     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1525     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1526     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1527     {"unsigned", &Type_callAsFunction_unsigned, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1528     {NULL, NULL, 0}
1529 };
1530
1531 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1532
1533 _visible void CYSetArgs(int argc, const char *argv[]) {
1534     JSContextRef context(CYGetJSContext());
1535     JSValueRef args[argc];
1536     for (int i(0); i != argc; ++i)
1537         args[i] = CYCastJSValue(context, argv[i]);
1538
1539     JSObjectRef array;
1540     if (JSObjectMakeArray$ != NULL)
1541         array = _jsccall(*JSObjectMakeArray$, context, argc, args);
1542     else {
1543         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1544         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1545         array = CYCastJSObject(context, value);
1546     }
1547
1548     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1549     CYSetProperty(context, System, CYJSString("args"), array);
1550 }
1551
1552 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1553     return JSContextGetGlobalObject(context);
1554 }
1555
1556 // XXX: this is neither exceptin safe nor even terribly sane
1557 class ExecutionHandle {
1558   private:
1559     JSContextRef context_;
1560     std::vector<void *> handles_;
1561
1562   public:
1563     ExecutionHandle(JSContextRef context) :
1564         context_(context)
1565     {
1566         handles_.resize(GetHooks().size());
1567         for (size_t i(0); i != GetHooks().size(); ++i) {
1568             CYHook *hook(GetHooks()[i]);
1569             if (hook->ExecuteStart != NULL)
1570                 handles_[i] = (*hook->ExecuteStart)(context_);
1571             else
1572                 handles_[i] = NULL;
1573         }
1574     }
1575
1576     ~ExecutionHandle() {
1577         for (size_t i(GetHooks().size()); i != 0; --i) {
1578             CYHook *hook(GetHooks()[i-1]);
1579             if (hook->ExecuteEnd != NULL)
1580                 (*hook->ExecuteEnd)(context_, handles_[i-1]);
1581         }
1582     }
1583 };
1584
1585 static volatile bool cancel_;
1586
1587 static bool CYShouldTerminate(JSContextRef context, void *arg) {
1588     return cancel_;
1589 }
1590
1591 _visible const char *CYExecute(JSContextRef context, CYPool &pool, CYUTF8String code) {
1592     JSValueRef exception(NULL);
1593     if (false) error:
1594         return CYPoolCString(pool, context, CYJSString(context, exception));
1595
1596     ExecutionHandle handle(context);
1597
1598     cancel_ = false;
1599     if (&JSContextGroupSetExecutionTimeLimit != NULL)
1600         JSContextGroupSetExecutionTimeLimit(JSContextGetGroup(context), 0.5, &CYShouldTerminate, NULL);
1601
1602     JSValueRef result(JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception));
1603     if (exception != NULL)
1604         goto error;
1605
1606     if (JSValueIsUndefined(context, result))
1607         return NULL;
1608
1609     std::set<void *> objects;
1610     const char *json(CYPoolCCYON(pool, context, result, objects, &exception));
1611     if (exception != NULL)
1612         goto error;
1613
1614     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1615
1616     return json;
1617 }
1618
1619 _visible void CYCancel() {
1620     cancel_ = true;
1621 }
1622
1623 static bool initialized_ = false;
1624
1625 void CYInitializeDynamic() {
1626     if (!initialized_)
1627         initialized_ = true;
1628     else return;
1629
1630     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1631     JSSynchronousGarbageCollectForDebugging$ = reinterpret_cast<void (*)(JSContextRef)>(dlsym(RTLD_DEFAULT, "JSSynchronousGarbageCollectForDebugging"));
1632
1633     JSClassDefinition definition;
1634
1635     definition = kJSClassDefinitionEmpty;
1636     definition.className = "All";
1637     definition.hasProperty = &All_hasProperty;
1638     definition.getProperty = &All_getProperty;
1639     definition.getPropertyNames = &All_getPropertyNames;
1640     All_ = JSClassCreate(&definition);
1641
1642     definition = kJSClassDefinitionEmpty;
1643     definition.className = "Context";
1644     definition.finalize = &CYFinalize;
1645     Context_ = JSClassCreate(&definition);
1646
1647     definition = kJSClassDefinitionEmpty;
1648     definition.className = "Functor";
1649     definition.staticFunctions = cy::Functor::StaticFunctions;
1650     definition.staticValues = Functor_staticValues;
1651     definition.callAsFunction = &Functor_callAsFunction;
1652     definition.finalize = &CYFinalize;
1653     Functor_ = JSClassCreate(&definition);
1654
1655     definition = kJSClassDefinitionEmpty;
1656     definition.className = "Pointer";
1657     definition.staticFunctions = Pointer_staticFunctions;
1658     definition.staticValues = Pointer_staticValues;
1659     definition.getProperty = &Pointer_getProperty;
1660     definition.setProperty = &Pointer_setProperty;
1661     definition.finalize = &CYFinalize;
1662     Pointer_ = JSClassCreate(&definition);
1663
1664     definition = kJSClassDefinitionEmpty;
1665     definition.className = "Struct";
1666     definition.staticFunctions = Struct_staticFunctions;
1667     definition.getProperty = &Struct_getProperty;
1668     definition.setProperty = &Struct_setProperty;
1669     definition.getPropertyNames = &Struct_getPropertyNames;
1670     definition.finalize = &CYFinalize;
1671     Struct_ = JSClassCreate(&definition);
1672
1673     definition = kJSClassDefinitionEmpty;
1674     definition.className = "Type";
1675     definition.staticValues = Type_staticValues;
1676     definition.staticFunctions = Type_staticFunctions;
1677     definition.callAsFunction = &Type_callAsFunction;
1678     definition.callAsConstructor = &Type_callAsConstructor;
1679     definition.finalize = &CYFinalize;
1680     Type_privateData::Class_ = JSClassCreate(&definition);
1681
1682     definition = kJSClassDefinitionEmpty;
1683     definition.className = "Global";
1684     //definition.getProperty = &Global_getProperty;
1685     Global_ = JSClassCreate(&definition);
1686
1687     Array_s = JSStringCreateWithUTF8CString("Array");
1688     cy_s = JSStringCreateWithUTF8CString("$cy");
1689     cyi_s = JSStringCreateWithUTF8CString("$cyi");
1690     length_s = JSStringCreateWithUTF8CString("length");
1691     message_s = JSStringCreateWithUTF8CString("message");
1692     name_s = JSStringCreateWithUTF8CString("name");
1693     pop_s = JSStringCreateWithUTF8CString("pop");
1694     prototype_s = JSStringCreateWithUTF8CString("prototype");
1695     push_s = JSStringCreateWithUTF8CString("push");
1696     splice_s = JSStringCreateWithUTF8CString("splice");
1697     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1698     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1699     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1700     toString_s = JSStringCreateWithUTF8CString("toString");
1701     weak_s = JSStringCreateWithUTF8CString("weak");
1702
1703     Result_ = JSStringCreateWithUTF8CString("_");
1704
1705     for (CYHook *hook : GetHooks())
1706         if (hook->Initialize != NULL)
1707             (*hook->Initialize)();
1708 }
1709
1710 void CYThrow(JSContextRef context, JSValueRef value) {
1711     if (value != NULL)
1712         throw CYJSError(context, value);
1713 }
1714
1715 const char *CYJSError::PoolCString(CYPool &pool) const {
1716     std::set<void *> objects;
1717     // XXX: this used to be CYPoolCString
1718     return CYPoolCCYON(pool, context_, value_, objects);
1719 }
1720
1721 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1722     // XXX: what if the context is different?
1723     return value_;
1724 }
1725
1726 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1727     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1728     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1729     return _jsccall(JSObjectCallAsConstructor, context, Error, 1, arguments);
1730 }
1731
1732 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1733     return CYCastJSError(context, message_);
1734 }
1735
1736 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1737     _assert(context != NULL);
1738
1739     CYPool pool;
1740
1741     va_list args;
1742     va_start(args, format);
1743     // XXX: there might be a beter way to think about this
1744     const char *message(pool.vsprintf(64, format, args));
1745     va_end(args);
1746
1747     value_ = CYCastJSError(context, message);
1748 }
1749
1750 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1751     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1752 }
1753
1754 void *CYMapFile(const char *path, size_t *psize) {
1755     int fd(_syscall_(open(path, O_RDONLY), 1, ENOENT));
1756     if (fd == -1)
1757         return NULL;
1758
1759     struct stat stat;
1760     _syscall(fstat(fd, &stat));
1761     size_t size(stat.st_size);
1762
1763     *psize = size;
1764
1765     void *base;
1766     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
1767
1768     _syscall(close(fd));
1769     return base;
1770 }
1771
1772 static JSValueRef require(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1773     _assert(count == 1);
1774     CYPool pool;
1775
1776     Dl_info addr;
1777     _assert(dladdr(reinterpret_cast<void *>(&require), &addr) != 0);
1778     char *lib(pool.strdup(addr.dli_fname));
1779
1780     char *slash(strrchr(lib, '/'));
1781     _assert(slash != NULL);
1782     *slash = '\0';
1783
1784     CYJSString property("exports");
1785     JSObjectRef module;
1786
1787     const char *name(CYPoolCString(pool, context, arguments[0]));
1788     const char *path(pool.strcat(lib, "/cycript0.9/", name, ".cy", NULL));
1789
1790     CYJSString key(path);
1791     JSObjectRef modules(CYGetCachedObject(context, CYJSString("modules")));
1792     JSValueRef cache(CYGetProperty(context, modules, key));
1793
1794     if (!JSValueIsUndefined(context, cache))
1795         module = CYCastJSObject(context, cache);
1796     else {
1797         CYUTF8String code;
1798         code.data = reinterpret_cast<char *>(CYMapFile(path, &code.size));
1799
1800         if (code.data == NULL) {
1801             if (strchr(name, '/') == NULL && (
1802 #ifdef __APPLE__
1803                 dlopen(pool.strcat("/System/Library/Frameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1804                 dlopen(pool.strcat("/System/Library/PrivateFrameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1805 #endif
1806             false))
1807                 return CYJSUndefined(NULL);
1808
1809             CYThrow("Can't find module: %s", name);
1810         }
1811
1812         module = JSObjectMake(context, NULL, NULL);
1813         CYSetProperty(context, modules, key, module);
1814
1815         JSObjectRef exports(JSObjectMake(context, NULL, NULL));
1816         CYSetProperty(context, module, property, exports);
1817
1818         std::stringstream wrap;
1819         wrap << "(function (exports, require, module) { " << code << "\n});";
1820         code = CYPoolCode(pool, wrap);
1821
1822         JSValueRef value(_jsccall(JSEvaluateScript, context, CYJSString(code), NULL, NULL, 0));
1823         JSObjectRef function(CYCastJSObject(context, value));
1824
1825         JSValueRef arguments[3] = { exports, JSObjectMakeFunctionWithCallback(context, CYJSString("require"), &require), module };
1826         CYCallAsFunction(context, function, NULL, 3, arguments);
1827     }
1828
1829     return CYGetProperty(context, module, property);
1830 } CYCatch(NULL) }
1831
1832 extern "C" void CYDestroyWeak(JSWeakObjectMapRef weak, void *data) {
1833 }
1834
1835 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1836     CYInitializeDynamic();
1837
1838     JSObjectRef global(CYGetGlobalObject(context));
1839
1840     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1841     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1842
1843 /* Cache Globals {{{ */
1844     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1845     CYSetProperty(context, cy, CYJSString("Array"), Array);
1846
1847     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1848     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1849
1850     JSObjectRef Boolean(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Boolean"))));
1851     CYSetProperty(context, cy, CYJSString("Boolean"), Boolean);
1852
1853     JSObjectRef Boolean_prototype(CYCastJSObject(context, CYGetProperty(context, Boolean, prototype_s)));
1854     CYSetProperty(context, cy, CYJSString("Boolean_prototype"), Boolean_prototype);
1855
1856     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1857     CYSetProperty(context, cy, CYJSString("Error"), Error);
1858
1859     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1860     CYSetProperty(context, cy, CYJSString("Function"), Function);
1861
1862     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1863     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1864
1865     JSObjectRef Number(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Number"))));
1866     CYSetProperty(context, cy, CYJSString("Number"), Number);
1867
1868     JSObjectRef Number_prototype(CYCastJSObject(context, CYGetProperty(context, Number, prototype_s)));
1869     CYSetProperty(context, cy, CYJSString("Number_prototype"), Number_prototype);
1870
1871     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1872     CYSetProperty(context, cy, CYJSString("Object"), Object);
1873
1874     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1875     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1876
1877     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1878     CYSetProperty(context, cy, CYJSString("String"), String);
1879
1880     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1881     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1882 /* }}} */
1883
1884     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1885     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1886
1887     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1888     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1889     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1890
1891     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1892     CYSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1893     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1894
1895     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1896     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1897
1898     JSObjectRef modules(JSObjectMake(context, NULL, NULL));
1899     CYSetProperty(context, cy, CYJSString("modules"), modules);
1900
1901     JSObjectRef all(JSObjectMake(context, All_, NULL));
1902     CYSetProperty(context, cycript, CYJSString("all"), all);
1903
1904     JSObjectRef alls(_jsccall(JSObjectCallAsConstructor, context, Array, 0, NULL));
1905     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1906
1907     if (true) {
1908         JSObjectRef last(NULL), curr(global);
1909
1910         goto next; for (JSValueRef next;;) {
1911             if (JSValueIsNull(context, next))
1912                 break;
1913             last = curr;
1914             curr = CYCastJSObject(context, next);
1915           next:
1916             next = JSObjectGetPrototype(context, curr);
1917         }
1918
1919         CYSetPrototype(context, last, all);
1920     }
1921
1922     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1923     CYSetProperty(context, cy, CYJSString("System"), System);
1924
1925     CYSetProperty(context, all, CYJSString("require"), &require, kJSPropertyAttributeDontEnum);
1926
1927     CYSetProperty(context, global, CYJSString("system"), System);
1928     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1929     //CYSetProperty(context, System, CYJSString("global"), global);
1930     CYSetProperty(context, System, CYJSString("print"), &System_print);
1931
1932 #ifdef __APPLE__
1933     if (&JSWeakObjectMapCreate != NULL) {
1934         JSWeakObjectMapRef weak(JSWeakObjectMapCreate(context, NULL, &CYDestroyWeak));
1935         CYSetProperty(context, cy, weak_s, CYCastJSValue(context, reinterpret_cast<uintptr_t>(weak)));
1936     }
1937 #endif
1938
1939     if (CYBridgeEntry *entry = CYBridgeHash("1dlerror", 8))
1940         entry->cache_ = new cy::Functor(entry->value_, reinterpret_cast<void (*)()>(&dlerror));
1941
1942     for (CYHook *hook : GetHooks())
1943         if (hook->SetupContext != NULL)
1944             (*hook->SetupContext)(context);
1945
1946     CYArrayPush(context, alls, cycript);
1947 }
1948
1949 static JSGlobalContextRef context_;
1950
1951 _visible JSGlobalContextRef CYGetJSContext() {
1952     CYInitializeDynamic();
1953
1954     if (context_ == NULL) {
1955         context_ = JSGlobalContextCreate(Global_);
1956         CYSetupContext(context_);
1957     }
1958
1959     return context_;
1960 }
1961
1962 _visible void CYDestroyContext() {
1963     if (context_ == NULL)
1964         return;
1965     JSGlobalContextRelease(context_);
1966     context_ = NULL;
1967 }