Execute.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2014  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
 158 static JSStringRef Result_;
 159
 160 void CYFinalize(JSObjectRef object) {
 161     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 162     _assert(internal->count_ != _not(unsigned));
 163     if (--internal->count_ == 0)
 164         delete internal;
 165 }
 166
 167 void Structor_(CYPool &pool, sig::Type *&type) {
 168     if (
 169         type->primitive == sig::pointer_P &&
 170         type->data.data.type->primitive == sig::struct_P &&
 171         type->data.data.type->name != NULL &&
 172         strcmp(type->data.data.type->name, "_objc_class") == 0
 173     ) {
 174         type->primitive = sig::typename_P;
 175         type->data.data.type = NULL;
 176         return;
 177     }
 178
 179     if (type->primitive != sig::struct_P || type->name == NULL)
 180         return;
 181
 182     size_t length(strlen(type->name));
 183     char keyed[length + 2];
 184     memcpy(keyed + 1, type->name, length + 1);
 185
 186     static const char *modes = "34";
 187     for (size_t i(0); i != 2; ++i) {
 188         char mode(modes[i]);
 189         keyed[0] = mode;
 190
 191         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 192             switch (mode) {
 193                 case '3':
 194                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 195                 break;
 196
 197                 case '4': {
 198                     sig::Signature signature;
 199                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 200                     type = signature.elements[0].type;
 201                 } break;
 202             }
 203     }
 204 }
 205
 206 JSClassRef Type_privateData::Class_;
 207
 208 struct Context :
 209     CYData
 210 {
 211     JSGlobalContextRef context_;
 212
 213     Context(JSGlobalContextRef context) :
 214         context_(context)
 215     {
 216     }
 217 };
 218
 219 struct Pointer :
 220     CYOwned
 221 {
 222     Type_privateData *type_;
 223     size_t length_;
 224
 225     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 226         CYOwned(value, context, owner),
 227         type_(new(*pool_) Type_privateData(type)),
 228         length_(length)
 229     {
 230     }
 231 };
 232
 233 struct Struct_privateData :
 234     CYOwned
 235 {
 236     Type_privateData *type_;
 237
 238     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 239         CYOwned(NULL, context, owner)
 240     {
 241     }
 242 };
 243
 244 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 245     Struct_privateData *internal(new Struct_privateData(context, owner));
 246     CYPool &pool(*internal->pool_);
 247     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 248     internal->type_ = typical;
 249
 250     if (owner != NULL)
 251         internal->value_ = data;
 252     else {
 253         size_t size(typical->GetFFI()->size);
 254         void *copy(internal->pool_->malloc<void>(size));
 255         memcpy(copy, data, size);
 256         internal->value_ = copy;
 257     }
 258
 259     return JSObjectMake(context, Struct_, internal);
 260 }
 261
 262 static void *CYCastSymbol(const char *name) {
 263     return dlsym(RTLD_DEFAULT, name);
 264 }
 265
 266 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 267     return JSValueMakeBoolean(context, value);
 268 }
 269
 270 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 271     return JSValueMakeNumber(context, value);
 272 }
 273
 274 #define CYCastJSValue_(Type_) \
 275     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 276         return JSValueMakeNumber(context, static_cast<double>(value)); \
 277     }
 278
 279 CYCastJSValue_(int)
 280 CYCastJSValue_(unsigned int)
 281 CYCastJSValue_(long int)
 282 CYCastJSValue_(long unsigned int)
 283 CYCastJSValue_(long long int)
 284 CYCastJSValue_(long long unsigned int)
 285
 286 JSValueRef CYJSUndefined(JSContextRef context) {
 287     return JSValueMakeUndefined(context);
 288 }
 289
 290 double CYCastDouble(JSContextRef context, JSValueRef value) {
 291     return _jsccall(JSValueToNumber, context, value);
 292 }
 293
 294 bool CYCastBool(JSContextRef context, JSValueRef value) {
 295     return JSValueToBoolean(context, value);
 296 }
 297
 298 JSValueRef CYJSNull(JSContextRef context) {
 299     return JSValueMakeNull(context);
 300 }
 301
 302 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 303     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 304 }
 305
 306 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 307     return CYCastJSValue(context, CYJSString(value));
 308 }
 309
 310 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 311     return _jsccall(JSValueToObject, context, value);
 312 }
 313
 314 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 315     return _jsccall(JSObjectCallAsFunction, context, function, _this, count, arguments);
 316 }
 317
 318 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 319     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 320 }
 321
 322 bool CYIsEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 323     return _jsccall(JSValueIsEqual, context, lhs, rhs);
 324 }
 325
 326 bool CYIsStrictEqual(JSContextRef context, JSValueRef lhs, JSValueRef rhs) {
 327     return JSValueIsStrictEqual(context, lhs, rhs);
 328 }
 329
 330 size_t CYArrayLength(JSContextRef context, JSObjectRef array) {
 331     return CYCastDouble(context, CYGetProperty(context, array, length_s));
 332 }
 333
 334 JSValueRef CYArrayGet(JSContextRef context, JSObjectRef array, size_t index) {
 335     return _jsccall(JSObjectGetPropertyAtIndex, context, array, index);
 336 }
 337
 338 void CYArrayPush(JSContextRef context, JSObjectRef array, JSValueRef value) {
 339     JSValueRef arguments[1];
 340     arguments[0] = value;
 341     JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
 342     _jsccall(JSObjectCallAsFunction, context, CYCastJSObject(context, CYGetProperty(context, Array, push_s)), array, 1, arguments);
 343 }
 344
 345 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 346     if (count == 0)
 347         printf("\n");
 348     else {
 349         CYPool pool;
 350         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 351     }
 352
 353     return CYJSUndefined(context);
 354 } CYCatch(NULL) }
 355
 356 static size_t Nonce_(0);
 357
 358 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 359     CYPool pool;
 360     const char *name(pool.strcat(CYPoolCString(pool, context, arguments[0]), pool.itoa(Nonce_++), NULL));
 361     return CYCastJSValue(context, name);
 362 } CYCatch(NULL) }
 363
 364 static void (*JSSynchronousGarbageCollectForDebugging$)(JSContextRef);
 365
 366 void CYGarbageCollect(JSContextRef context) {
 367     (JSSynchronousGarbageCollectForDebugging$ ?: &JSGarbageCollect)(context);
 368 }
 369
 370 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 371     CYGarbageCollect(context);
 372     return CYJSUndefined(context);
 373 } CYCatch(NULL) }
 374
 375 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects, JSValueRef *exception) { CYTry {
 376     switch (JSType type = JSValueGetType(context, value)) {
 377         case kJSTypeUndefined:
 378             return "undefined";
 379         case kJSTypeNull:
 380             return "null";
 381         case kJSTypeBoolean:
 382             return CYCastBool(context, value) ? "true" : "false";
 383
 384         case kJSTypeNumber: {
 385             std::ostringstream str;
 386             CYNumerify(str, CYCastDouble(context, value));
 387             std::string value(str.str());
 388             return pool.strmemdup(value.c_str(), value.size());
 389         } break;
 390
 391         case kJSTypeString: {
 392             std::ostringstream str;
 393             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 394             CYStringify(str, string.data, string.size);
 395             std::string value(str.str());
 396             return pool.strmemdup(value.c_str(), value.size());
 397         } break;
 398
 399         case kJSTypeObject:
 400             return CYPoolCCYON(pool, context, (JSObjectRef) value, objects);
 401         default:
 402             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 403     }
 404 } CYCatch(NULL) }
 405
 406 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> &objects) {
 407     return _jsccall(CYPoolCCYON, pool, context, value, objects);
 408 }
 409
 410 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSValueRef value, std::set<void *> *objects) {
 411     if (objects != NULL)
 412         return CYPoolCCYON(pool, context, value, *objects);
 413     else {
 414         std::set<void *> objects;
 415         return CYPoolCCYON(pool, context, value, objects);
 416     }
 417 }
 418
 419 const char *CYPoolCCYON(CYPool &pool, JSContextRef context, JSObjectRef object, std::set<void *> &objects) {
 420     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 421     if (CYIsCallable(context, toCYON)) {
 422         // XXX: this needs to be abstracted behind some kind of function
 423         JSValueRef arguments[1] = {CYCastJSValue(context, static_cast<double>(reinterpret_cast<uintptr_t>(&objects)))};
 424         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 1, arguments));
 425         _assert(value != NULL);
 426         return CYPoolCString(pool, context, value);
 427     }
 428
 429     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 430     if (CYIsCallable(context, toJSON)) {
 431         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 432         return _jsccall(CYPoolCCYON, pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), objects);
 433     }
 434
 435     if (JSObjectIsFunction(context, object)) {
 436         JSValueRef toString(CYGetProperty(context, object, toString_s));
 437         if (CYIsCallable(context, toString)) {
 438             JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 439             JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toString, object, 1, arguments));
 440             _assert(value != NULL);
 441             return CYPoolCString(pool, context, value);
 442         }
 443     }
 444
 445     _assert(objects.insert(object).second);
 446
 447     std::ostringstream str;
 448
 449     str << '{';
 450
 451     // XXX: this is, sadly, going to leak
 452     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 453
 454     bool comma(false);
 455
 456     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 457         if (comma)
 458             str << ',';
 459         else
 460             comma = true;
 461
 462         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 463         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 464
 465         if (CYIsKey(string))
 466             str << string.data;
 467         else
 468             CYStringify(str, string.data, string.size);
 469
 470         str << ':';
 471
 472         try {
 473             JSValueRef value(CYGetProperty(context, object, name));
 474             str << CYPoolCCYON(pool, context, value, objects);
 475         } catch (const CYException &error) {
 476             str << "@error";
 477         }
 478     }
 479
 480     JSPropertyNameArrayRelease(names);
 481
 482     str << '}';
 483
 484     std::string string(str.str());
 485     return pool.strmemdup(string.c_str(), string.size());
 486 }
 487
 488 std::set<void *> *CYCastObjects(JSContextRef context, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 489     if (count == 0)
 490         return NULL;
 491     return CYCastPointer<std::set<void *> *>(context, arguments[0]);
 492 }
 493
 494 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 495     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
 496     // XXX: this is horribly inefficient
 497     std::set<void *> backup;
 498     if (objects == NULL)
 499         objects = &backup;
 500
 501     CYPool pool;
 502     std::ostringstream str;
 503
 504     str << '[';
 505
 506     JSValueRef length(CYGetProperty(context, _this, length_s));
 507     bool comma(false);
 508
 509     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 510         if (comma)
 511             str << ',';
 512         else
 513             comma = true;
 514
 515         try {
 516             JSValueRef value(CYGetProperty(context, _this, index));
 517             if (!JSValueIsUndefined(context, value))
 518                 str << CYPoolCCYON(pool, context, value, *objects);
 519             else {
 520                 str << ',';
 521                 comma = false;
 522             }
 523         } catch (const CYException &error) {
 524             str << "@error";
 525         }
 526     }
 527
 528     str << ']';
 529
 530     std::string value(str.str());
 531     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 532 } CYCatch(NULL) }
 533
 534 static JSValueRef String_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 535     CYPool pool;
 536     std::ostringstream str;
 537
 538     CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, _this)));
 539     CYStringify(str, string.data, string.size);
 540
 541     std::string value(str.str());
 542     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 543 } CYCatch(NULL) }
 544
 545 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 546     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 547     return JSObjectMake(context, Pointer_, internal);
 548 }
 549
 550 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const sig::Signature &signature) {
 551     return JSObjectMake(context, Functor_, new cy::Functor(signature, function));
 552 }
 553
 554 static JSObjectRef CYMakeFunctor(JSContextRef context, const char *symbol, const char *encoding, void **cache) {
 555     cy::Functor *internal;
 556     if (*cache != NULL)
 557         internal = reinterpret_cast<cy::Functor *>(*cache);
 558     else {
 559         void (*function)()(reinterpret_cast<void (*)()>(CYCastSymbol(symbol)));
 560         if (function == NULL)
 561             return NULL;
 562
 563         internal = new cy::Functor(encoding, function);
 564         *cache = internal;
 565     }
 566
 567     ++internal->count_;
 568     return JSObjectMake(context, Functor_, internal);
 569 }
 570
 571 static bool CYGetOffset(CYPool &pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 572     return CYGetOffset(CYPoolCString(pool, context, value), index);
 573 }
 574
 575 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 576     switch (JSValueGetType(context, value)) {
 577         case kJSTypeNull:
 578             return NULL;
 579         case kJSTypeObject: {
 580             JSObjectRef object((JSObjectRef) value);
 581             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 582                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 583                 return internal->value_;
 584             }
 585             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 586             if (CYIsCallable(context, toPointer)) {
 587                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 588                 _assert(value != NULL);
 589                 return CYCastPointer_(context, value);
 590             }
 591         } default:
 592             double number(CYCastDouble(context, value));
 593             if (std::isnan(number))
 594                 throw CYJSError(context, "cannot convert value to pointer");
 595             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 596     }
 597 }
 598
 599 void CYPoolFFI(CYPool *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 600     switch (type->primitive) {
 601         case sig::boolean_P:
 602             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 603         break;
 604
 605 #define CYPoolFFI_(primitive, native) \
 606         case sig::primitive ## _P: \
 607             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 608         break;
 609
 610         CYPoolFFI_(uchar, unsigned char)
 611         CYPoolFFI_(char, char)
 612         CYPoolFFI_(ushort, unsigned short)
 613         CYPoolFFI_(short, short)
 614         CYPoolFFI_(ulong, unsigned long)
 615         CYPoolFFI_(long, long)
 616         CYPoolFFI_(uint, unsigned int)
 617         CYPoolFFI_(int, int)
 618         CYPoolFFI_(ulonglong, unsigned long long)
 619         CYPoolFFI_(longlong, long long)
 620         CYPoolFFI_(float, float)
 621         CYPoolFFI_(double, double)
 622
 623         case sig::array_P: {
 624             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 625             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 626             for (size_t index(0); index != type->data.data.size; ++index) {
 627                 ffi_type *field(ffi->elements[index]);
 628
 629                 JSValueRef rhs;
 630                 if (aggregate == NULL)
 631                     rhs = value;
 632                 else {
 633                     rhs = CYGetProperty(context, aggregate, index);
 634                     if (JSValueIsUndefined(context, rhs))
 635                         throw CYJSError(context, "unable to extract array value");
 636                 }
 637
 638                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 639                 // XXX: alignment?
 640                 base += field->size;
 641             }
 642         } break;
 643
 644         case sig::pointer_P:
 645             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 646         break;
 647
 648         case sig::string_P:
 649             _assert(pool != NULL);
 650             *reinterpret_cast<const char **>(data) = CYPoolCString(*pool, context, value);
 651         break;
 652
 653         case sig::struct_P: {
 654             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 655             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 656             for (size_t index(0); index != type->data.signature.count; ++index) {
 657                 sig::Element *element(&type->data.signature.elements[index]);
 658                 ffi_type *field(ffi->elements[index]);
 659
 660                 JSValueRef rhs;
 661                 if (aggregate == NULL)
 662                     rhs = value;
 663                 else {
 664                     rhs = CYGetProperty(context, aggregate, index);
 665                     if (JSValueIsUndefined(context, rhs)) {
 666                         if (element->name != NULL)
 667                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 668                         else
 669                             goto undefined;
 670                         if (JSValueIsUndefined(context, rhs)) undefined:
 671                             throw CYJSError(context, "unable to extract structure value");
 672                     }
 673                 }
 674
 675                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 676                 // XXX: alignment?
 677                 base += field->size;
 678             }
 679         } break;
 680
 681         case sig::void_P:
 682         break;
 683
 684         default:
 685             for (CYHook *hook : GetHooks())
 686                 if (hook->PoolFFI != NULL)
 687                     if ((*hook->PoolFFI)(pool, context, type, ffi, data, value))
 688                         return;
 689
 690             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 691     }
 692 }
 693
 694 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 695     switch (type->primitive) {
 696         case sig::boolean_P:
 697             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 698
 699 #define CYFromFFI_(primitive, native) \
 700         case sig::primitive ## _P: \
 701             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 702
 703         CYFromFFI_(uchar, unsigned char)
 704         CYFromFFI_(char, char)
 705         CYFromFFI_(ushort, unsigned short)
 706         CYFromFFI_(short, short)
 707         CYFromFFI_(ulong, unsigned long)
 708         CYFromFFI_(long, long)
 709         CYFromFFI_(uint, unsigned int)
 710         CYFromFFI_(int, int)
 711         CYFromFFI_(ulonglong, unsigned long long)
 712         CYFromFFI_(longlong, long long)
 713         CYFromFFI_(float, float)
 714         CYFromFFI_(double, double)
 715
 716         case sig::array_P:
 717             if (void *pointer = data)
 718                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 719             else goto null;
 720
 721         case sig::pointer_P:
 722             if (void *pointer = *reinterpret_cast<void **>(data))
 723                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 724             else goto null;
 725
 726         case sig::string_P:
 727             if (char *utf8 = *reinterpret_cast<char **>(data))
 728                 return CYCastJSValue(context, utf8);
 729             else goto null;
 730
 731         case sig::struct_P:
 732             return CYMakeStruct(context, data, type, ffi, owner);
 733         case sig::void_P:
 734             return CYJSUndefined(context);
 735
 736         null:
 737             return CYJSNull(context);
 738         default:
 739             for (CYHook *hook : GetHooks())
 740                 if (hook->FromFFI != NULL)
 741                     if (JSValueRef value = (*hook->FromFFI)(context, type, ffi, data, initialize, owner))
 742                         return value;
 743
 744             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 745     }
 746 }
 747
 748 void CYExecuteClosure(ffi_cif *cif, void *result, void **arguments, void *arg, JSValueRef (*adapter)(JSContextRef, size_t, JSValueRef[], JSObjectRef)) {
 749     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 750
 751     JSContextRef context(internal->context_);
 752
 753     size_t count(internal->cif_.nargs);
 754     JSValueRef values[count];
 755
 756     for (size_t index(0); index != count; ++index)
 757         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 758
 759     JSValueRef value(adapter(context, count, values, internal->function_));
 760     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 761 }
 762
 763 static JSValueRef FunctionAdapter_(JSContextRef context, size_t count, JSValueRef values[], JSObjectRef function) {
 764     return CYCallAsFunction(context, function, NULL, count, values);
 765 }
 766
 767 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 768     CYExecuteClosure(cif, result, arguments, arg, &FunctionAdapter_);
 769 }
 770
 771 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const sig::Signature &signature, void (*callback)(ffi_cif *, void *, void **, void *)) {
 772     // XXX: in case of exceptions this will leak
 773     // XXX: in point of fact, this may /need/ to leak :(
 774     Closure_privateData *internal(new Closure_privateData(context, function, signature));
 775
 776 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 777     void *executable;
 778     ffi_closure *writable(reinterpret_cast<ffi_closure *>(ffi_closure_alloc(sizeof(ffi_closure), &executable)));
 779
 780     ffi_status status(ffi_prep_closure_loc(writable, &internal->cif_, callback, internal, executable));
 781     _assert(status == FFI_OK);
 782
 783     internal->value_ = executable;
 784 #else
 785     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 786         NULL, sizeof(ffi_closure),
 787         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 788         -1, 0
 789     )));
 790
 791     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 792     _assert(status == FFI_OK);
 793
 794     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 795
 796     internal->value_ = closure;
 797 #endif
 798
 799     return internal;
 800 }
 801
 802 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const sig::Signature &signature) {
 803     Closure_privateData *internal(CYMakeFunctor_(context, function, signature, &FunctionClosure_));
 804     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 805     // XXX: see above notes about needing to leak
 806     JSValueProtect(CYGetJSContext(context), object);
 807     return object;
 808 }
 809
 810 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 811     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 812 }
 813
 814 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const sig::Signature &signature) {
 815     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 816
 817     bool function(_jsccall(JSValueIsInstanceOfConstructor, context, value, Function));
 818     if (function) {
 819         JSObjectRef function(CYCastJSObject(context, value));
 820         return CYMakeFunctor(context, function, signature);
 821     } else {
 822         void (*function)()(CYCastPointer<void (*)()>(context, value));
 823         return CYMakeFunctor(context, function, signature);
 824     }
 825 }
 826
 827 static bool Index_(CYPool &pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 828     Type_privateData *typical(internal->type_);
 829     sig::Type *type(typical->type_);
 830     if (type == NULL)
 831         return false;
 832
 833     const char *name(CYPoolCString(pool, context, property));
 834     size_t length(strlen(name));
 835     double number(CYCastDouble(name, length));
 836
 837     size_t count(type->data.signature.count);
 838
 839     if (std::isnan(number)) {
 840         if (property == NULL)
 841             return false;
 842
 843         sig::Element *elements(type->data.signature.elements);
 844
 845         for (size_t local(0); local != count; ++local) {
 846             sig::Element *element(&elements[local]);
 847             if (element->name != NULL && strcmp(name, element->name) == 0) {
 848                 index = local;
 849                 goto base;
 850             }
 851         }
 852
 853         return false;
 854     } else {
 855         index = static_cast<ssize_t>(number);
 856         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 857             return false;
 858     }
 859
 860   base:
 861     ffi_type **elements(typical->GetFFI()->elements);
 862
 863     base = reinterpret_cast<uint8_t *>(internal->value_);
 864     for (ssize_t local(0); local != index; ++local)
 865         base += elements[local]->size;
 866
 867     return true;
 868 }
 869
 870 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 871     CYPool pool;
 872     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 873
 874     if (JSStringIsEqual(property, length_s))
 875         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 876
 877     Type_privateData *typical(internal->type_);
 878     if (typical->type_ == NULL)
 879         return NULL;
 880     sig::Type &type(*typical->type_);
 881
 882     ssize_t offset;
 883     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 884         offset = 0;
 885     else if (!CYGetOffset(pool, context, property, offset))
 886         return NULL;
 887
 888     if (type.primitive == sig::function_P)
 889         return CYMakeFunctor(context, reinterpret_cast<void (*)()>(internal->value_), type.data.signature);
 890
 891     ffi_type *ffi(typical->GetFFI());
 892
 893     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 894     base += ffi->size * offset;
 895
 896     JSObjectRef owner(internal->GetOwner() ?: object);
 897     return CYFromFFI(context, &type, ffi, base, false, owner);
 898 } CYCatch(NULL) }
 899
 900 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 901     CYPool pool;
 902     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 903     Type_privateData *typical(internal->type_);
 904
 905     if (typical->type_ == NULL)
 906         return false;
 907
 908     ssize_t offset;
 909     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 910         offset = 0;
 911     else if (!CYGetOffset(pool, context, property, offset))
 912         return false;
 913
 914     ffi_type *ffi(typical->GetFFI());
 915
 916     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 917     base += ffi->size * offset;
 918
 919     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 920     return true;
 921 } CYCatch(false) }
 922
 923 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 924     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 925     Type_privateData *typical(internal->type_);
 926     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 927 } CYCatch(NULL) }
 928
 929 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 930     CYPool pool;
 931     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 932     Type_privateData *typical(internal->type_);
 933
 934     ssize_t index;
 935     uint8_t *base;
 936
 937     if (!Index_(pool, context, internal, property, index, base))
 938         return NULL;
 939
 940     JSObjectRef owner(internal->GetOwner() ?: object);
 941
 942     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 943 } CYCatch(NULL) }
 944
 945 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 946     CYPool pool;
 947     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 948     Type_privateData *typical(internal->type_);
 949
 950     ssize_t index;
 951     uint8_t *base;
 952
 953     if (!Index_(pool, context, internal, property, index, base))
 954         return false;
 955
 956     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 957     return true;
 958 } CYCatch(false) }
 959
 960 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 961     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 962     Type_privateData *typical(internal->type_);
 963     sig::Type *type(typical->type_);
 964
 965     if (type == NULL)
 966         return;
 967
 968     size_t count(type->data.signature.count);
 969     sig::Element *elements(type->data.signature.elements);
 970
 971     char number[32];
 972
 973     for (size_t index(0); index != count; ++index) {
 974         const char *name;
 975         name = elements[index].name;
 976
 977         if (name == NULL) {
 978             sprintf(number, "%zu", index);
 979             name = number;
 980         }
 981
 982         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 983     }
 984 }
 985
 986 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)()) {
 987     if (setups + count != signature->count - 1)
 988         throw CYJSError(context, "incorrect number of arguments to ffi function");
 989
 990     size_t size(setups + count);
 991     void *values[size];
 992     memcpy(values, setup, sizeof(void *) * setups);
 993
 994     for (size_t index(setups); index != size; ++index) {
 995         sig::Element *element(&signature->elements[index + 1]);
 996         ffi_type *ffi(cif->arg_types[index]);
 997         // XXX: alignment?
 998         values[index] = new(pool) uint8_t[ffi->size];
 999         CYPoolFFI(&pool, context, element->type, ffi, values[index], arguments[index - setups]);
1000     }
1001
1002     uint8_t value[cif->rtype->size];
1003
1004     for (CYHook *hook : GetHooks())
1005         if (hook->CallFunction != NULL) {
1006             // XXX: this only supports one hook, but it is a bad idea anyway
1007             (*hook->CallFunction)(context, cif, function, value, values);
1008             goto from;
1009         }
1010     ffi_call(cif, function, value, values);
1011
1012   from:
1013     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
1014 }
1015
1016 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1017     CYPool pool;
1018     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1019     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, &internal->signature_, &internal->cif_, internal->GetValue());
1020 } CYCatch(NULL) }
1021
1022 JSObjectRef CYMakeType(JSContextRef context, const char *encoding) {
1023     Type_privateData *internal(new Type_privateData(encoding));
1024     return JSObjectMake(context, Type_privateData::Class_, internal);
1025 }
1026
1027 JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
1028     Type_privateData *internal(new Type_privateData(type));
1029     return JSObjectMake(context, Type_privateData::Class_, internal);
1030 }
1031
1032 JSObjectRef CYMakeType(JSContextRef context, sig::Signature *signature) {
1033     CYPool pool;
1034
1035     sig::Type type;
1036     type.name = NULL;
1037     type.flags = 0;
1038
1039     type.primitive = sig::function_P;
1040     sig::Copy(pool, type.data.signature, *signature);
1041
1042     return CYMakeType(context, &type);
1043 }
1044
1045 static bool All_hasProperty(JSContextRef context, JSObjectRef object, JSStringRef property) {
1046     JSObjectRef global(CYGetGlobalObject(context));
1047     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1048     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1049
1050     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1051         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1052             if (CYHasProperty(context, space, property))
1053                 return true;
1054
1055     CYPool pool;
1056     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1057
1058     size_t length(name.size);
1059     char keyed[length + 2];
1060     memcpy(keyed + 1, name.data, length + 1);
1061
1062     static const char *modes = "0124";
1063     for (size_t i(0); i != 4; ++i) {
1064         keyed[0] = modes[i];
1065         if (CYBridgeHash(keyed, length + 1) != NULL)
1066             return true;
1067     }
1068
1069     return false;
1070 }
1071
1072 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1073     JSObjectRef global(CYGetGlobalObject(context));
1074     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1075     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1076
1077     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1078         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1)))
1079             if (JSValueRef value = CYGetProperty(context, space, property))
1080                 if (!JSValueIsUndefined(context, value))
1081                     return value;
1082
1083     CYPool pool;
1084     CYUTF8String name(CYPoolUTF8String(pool, context, property));
1085
1086     size_t length(name.size);
1087     char keyed[length + 2];
1088     memcpy(keyed + 1, name.data, length + 1);
1089
1090     static const char *modes = "0124";
1091     for (size_t i(0); i != 4; ++i) {
1092         char mode(modes[i]);
1093         keyed[0] = mode;
1094
1095         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
1096             switch (mode) {
1097                 case '0':
1098                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
1099
1100                 case '1':
1101                     return CYMakeFunctor(context, name.data, entry->value_, &entry->cache_);
1102
1103                 case '2':
1104                     if (void *symbol = CYCastSymbol(name.data)) {
1105                         // XXX: this is horrendously inefficient
1106                         sig::Signature signature;
1107                         sig::Parse(pool, &signature, entry->value_, &Structor_);
1108                         ffi_cif cif;
1109                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
1110                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
1111                     } else return NULL;
1112
1113                 // XXX: implement case 3
1114                 case '4':
1115                     return CYMakeType(context, entry->value_);
1116             }
1117     }
1118
1119     return NULL;
1120 } CYCatch(NULL) }
1121
1122 static void All_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
1123     JSObjectRef global(CYGetGlobalObject(context));
1124     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
1125     JSObjectRef alls(CYCastJSObject(context, CYGetProperty(context, cycript, CYJSString("alls"))));
1126
1127     for (size_t i(0), count(CYArrayLength(context, alls)); i != count; ++i)
1128         if (JSObjectRef space = CYCastJSObject(context, CYArrayGet(context, alls, count - i - 1))) {
1129             JSPropertyNameArrayRef subset(JSObjectCopyPropertyNames(context, space));
1130             for (size_t index(0), count(JSPropertyNameArrayGetCount(subset)); index != count; ++index)
1131                 JSPropertyNameAccumulatorAddName(names, JSPropertyNameArrayGetNameAtIndex(subset, index));
1132             JSPropertyNameArrayRelease(subset);
1133         }
1134 }
1135
1136 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1137     if (count != 2)
1138         throw CYJSError(context, "incorrect number of arguments to Pointer constructor");
1139
1140     CYPool pool;
1141
1142     void *value(CYCastPointer<void *>(context, arguments[0]));
1143     const char *type(CYPoolCString(pool, context, arguments[1]));
1144
1145     sig::Signature signature;
1146     sig::Parse(pool, &signature, type, &Structor_);
1147
1148     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1149 } CYCatch(NULL) }
1150
1151 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1152     if (count != 1)
1153         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1154     CYPool pool;
1155     const char *type(CYPoolCString(pool, context, arguments[0]));
1156     return CYMakeType(context, type);
1157 } CYCatch(NULL) }
1158
1159 static JSValueRef Type_callAsFunction_$With(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], sig::Primitive primitive, JSValueRef *exception) { CYTry {
1160     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1161
1162     CYPool pool;
1163
1164     sig::Type type;
1165     type.name = NULL;
1166     type.flags = 0;
1167
1168     type.primitive = primitive;
1169     type.data.signature.elements = new(pool) sig::Element[1 + count];
1170     type.data.signature.count = 1 + count;
1171
1172     type.data.signature.elements[0].name = NULL;
1173     type.data.signature.elements[0].type = internal->type_;
1174     type.data.signature.elements[0].offset = _not(size_t);
1175
1176     for (size_t i(0); i != count; ++i) {
1177         sig::Element &element(type.data.signature.elements[i + 1]);
1178         element.name = NULL;
1179         element.offset = _not(size_t);
1180
1181         JSObjectRef object(CYCastJSObject(context, arguments[i]));
1182         _assert(JSValueIsObjectOfClass(context, object, Type_privateData::Class_));
1183         Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1184
1185         element.type = internal->type_;
1186     }
1187
1188     return CYMakeType(context, &type);
1189 } CYCatch(NULL) }
1190
1191 static JSValueRef Type_callAsFunction_arrayOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1192     if (count != 1)
1193         throw CYJSError(context, "incorrect number of arguments to Type.arrayOf");
1194     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1195
1196     CYPool pool;
1197     size_t index(CYGetIndex(pool, context, CYJSString(context, arguments[0])));
1198     if (index == _not(size_t))
1199         throw CYJSError(context, "invalid array size used with Type.arrayOf");
1200
1201     sig::Type type;
1202     type.name = NULL;
1203     type.flags = 0;
1204
1205     type.primitive = sig::array_P;
1206     type.data.data.type = internal->type_;
1207     type.data.data.size = index;
1208
1209     return CYMakeType(context, &type);
1210 } CYCatch(NULL) }
1211
1212 static JSValueRef Type_callAsFunction_blockWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1213     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::block_P, exception);
1214 }
1215
1216 static JSValueRef Type_callAsFunction_constant(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1217     if (count != 0)
1218         throw CYJSError(context, "incorrect number of arguments to Type.constant");
1219     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1220
1221     sig::Type type(*internal->type_);
1222     type.flags |= JOC_TYPE_CONST;
1223     return CYMakeType(context, &type);
1224 } CYCatch(NULL) }
1225
1226 static JSValueRef Type_callAsFunction_long(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1227     if (count != 0)
1228         throw CYJSError(context, "incorrect number of arguments to Type.long");
1229     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1230
1231     sig::Type type(*internal->type_);
1232
1233     switch (type.primitive) {
1234         case sig::short_P: type.primitive = sig::int_P; break;
1235         case sig::int_P: type.primitive = sig::long_P; break;
1236         case sig::long_P: type.primitive = sig::longlong_P; break;
1237         default: throw CYJSError(context, "invalid type argument to Type.long");
1238     }
1239
1240     return CYMakeType(context, &type);
1241 } CYCatch(NULL) }
1242
1243 static JSValueRef Type_callAsFunction_short(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1244     if (count != 0)
1245         throw CYJSError(context, "incorrect number of arguments to Type.short");
1246     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1247
1248     sig::Type type(*internal->type_);
1249
1250     switch (type.primitive) {
1251         case sig::int_P: type.primitive = sig::short_P; break;
1252         case sig::long_P: type.primitive = sig::int_P; break;
1253         case sig::longlong_P: type.primitive = sig::long_P; break;
1254         default: throw CYJSError(context, "invalid type argument to Type.short");
1255     }
1256
1257     return CYMakeType(context, &type);
1258 } CYCatch(NULL) }
1259
1260 static JSValueRef Type_callAsFunction_signed(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1261     if (count != 0)
1262         throw CYJSError(context, "incorrect number of arguments to Type.signed");
1263     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1264
1265     sig::Type type(*internal->type_);
1266
1267     switch (type.primitive) {
1268         case sig::char_P: case sig::uchar_P: type.primitive = sig::char_P; break;
1269         case sig::short_P: case sig::ushort_P: type.primitive = sig::short_P; break;
1270         case sig::int_P: case sig::uint_P: type.primitive = sig::int_P; break;
1271         case sig::long_P: case sig::ulong_P: type.primitive = sig::long_P; break;
1272         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::longlong_P; break;
1273         default: throw CYJSError(context, "invalid type argument to Type.signed");
1274     }
1275
1276     return CYMakeType(context, &type);
1277 } CYCatch(NULL) }
1278
1279 static JSValueRef Type_callAsFunction_unsigned(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1280     if (count != 0)
1281         throw CYJSError(context, "incorrect number of arguments to Type.unsigned");
1282     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1283
1284     sig::Type type(*internal->type_);
1285
1286     switch (type.primitive) {
1287         case sig::char_P: case sig::uchar_P: type.primitive = sig::uchar_P; break;
1288         case sig::short_P: case sig::ushort_P: type.primitive = sig::ushort_P; break;
1289         case sig::int_P: case sig::uint_P: type.primitive = sig::uint_P; break;
1290         case sig::long_P: case sig::ulong_P: type.primitive = sig::ulong_P; break;
1291         case sig::longlong_P: case sig::ulonglong_P: type.primitive = sig::ulonglong_P; break;
1292         default: throw CYJSError(context, "invalid type argument to Type.unsigned");
1293     }
1294
1295     return CYMakeType(context, &type);
1296 } CYCatch(NULL) }
1297
1298 static JSValueRef Type_callAsFunction_functionWith(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1299     return Type_callAsFunction_$With(context, object, _this, count, arguments, sig::function_P, exception);
1300 }
1301
1302 static JSValueRef Type_callAsFunction_pointerTo(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1303     if (count != 0)
1304         throw CYJSError(context, "incorrect number of arguments to Type.pointerTo");
1305     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1306
1307     sig::Type type;
1308     type.name = NULL;
1309
1310     if (internal->type_->primitive == sig::char_P) {
1311         type.flags = internal->type_->flags;
1312         type.primitive = sig::string_P;
1313         type.data.data.type = NULL;
1314         type.data.data.size = 0;
1315     } else {
1316         type.flags = 0;
1317         type.primitive = sig::pointer_P;
1318         type.data.data.type = internal->type_;
1319         type.data.data.size = 0;
1320     }
1321
1322     return CYMakeType(context, &type);
1323 } CYCatch(NULL) }
1324
1325 static JSValueRef Type_callAsFunction_withName(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1326     if (count != 1)
1327         throw CYJSError(context, "incorrect number of arguments to Type.withName");
1328     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1329
1330     CYPool pool;
1331     const char *name(CYPoolCString(pool, context, arguments[0]));
1332
1333     sig::Type type(*internal->type_);
1334     type.name = name;
1335     return CYMakeType(context, &type);
1336 } CYCatch(NULL) }
1337
1338 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1339     if (count != 1)
1340         throw CYJSError(context, "incorrect number of arguments to type cast function");
1341     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1342
1343     if (internal->type_->primitive == sig::function_P)
1344         return CYMakeFunctor(context, arguments[0], internal->type_->data.signature);
1345
1346     sig::Type *type(internal->type_);
1347     ffi_type *ffi(internal->GetFFI());
1348     // XXX: alignment?
1349     uint8_t value[ffi->size];
1350     CYPool pool;
1351     CYPoolFFI(&pool, context, type, ffi, value, arguments[0]);
1352     return CYFromFFI(context, type, ffi, value);
1353 } CYCatch(NULL) }
1354
1355 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1356     if (count != 0)
1357         throw CYJSError(context, "incorrect number of arguments to Type allocator");
1358     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1359
1360     sig::Type *type(internal->type_);
1361     size_t length;
1362
1363     if (type->primitive != sig::array_P)
1364         length = _not(size_t);
1365     else {
1366         length = type->data.data.size;
1367         type = type->data.data.type;
1368     }
1369
1370     void *value(calloc(1, internal->GetFFI()->size));
1371     return CYMakePointer(context, value, length, type, NULL, NULL);
1372 } CYCatch(NULL) }
1373
1374 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1375     if (count != 2)
1376         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1377     CYPool pool;
1378     const char *encoding(CYPoolCString(pool, context, arguments[1]));
1379     sig::Signature signature;
1380     sig::Parse(pool, &signature, encoding, &Structor_);
1381     return CYMakeFunctor(context, arguments[0], signature);
1382 } CYCatch(NULL) }
1383
1384 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1385     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1386     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1387 } CYCatch(NULL) }
1388
1389 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1390     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1391 }
1392
1393 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1394     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1395     char string[32];
1396     sprintf(string, "%p", internal->value_);
1397     return CYCastJSValue(context, string);
1398 } CYCatch(NULL) }
1399
1400 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1401     std::set<void *> *objects(CYCastObjects(context, _this, count, arguments));
1402
1403     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1404     if (internal->length_ != _not(size_t)) {
1405         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array_prototype")));
1406         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1407         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1408     } else if (internal->type_->type_ == NULL) pointer: {
1409         char string[32];
1410         sprintf(string, "%p", internal->value_);
1411         return CYCastJSValue(context, string);
1412     } try {
1413         JSValueRef value(CYGetProperty(context, _this, cyi_s));
1414         if (JSValueIsUndefined(context, value))
1415             goto pointer;
1416         CYPool pool;
1417         return CYCastJSValue(context, pool.strcat("&", CYPoolCCYON(pool, context, value, objects), NULL));
1418     } catch (const CYException &e) {
1419         goto pointer;
1420     }
1421 } CYCatch(NULL) }
1422
1423 static JSValueRef Pointer_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1424     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
1425     return CYMakeType(context, internal->type_->type_);
1426 } CYCatch(NULL) }
1427
1428 static JSValueRef Functor_getProperty_type(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1429     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
1430     return CYMakeType(context, &internal->signature_);
1431 } CYCatch(NULL) }
1432
1433 static JSValueRef Type_getProperty_alignment(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1434     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1435     return CYCastJSValue(context, internal->GetFFI()->alignment);
1436 } CYCatch(NULL) }
1437
1438 static JSValueRef Type_getProperty_name(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1439     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1440     return CYCastJSValue(context, internal->type_->name);
1441 } CYCatch(NULL) }
1442
1443 static JSValueRef Type_getProperty_size(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1444     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1445     return CYCastJSValue(context, internal->GetFFI()->size);
1446 } CYCatch(NULL) }
1447
1448 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1449     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1450     CYPool pool;
1451     const char *type(sig::Unparse(pool, internal->type_));
1452     return CYCastJSValue(context, CYJSString(type));
1453 } CYCatch(NULL) }
1454
1455 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1456     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1457     CYLocalPool pool;
1458     std::ostringstream out;
1459     CYOptions options;
1460     CYOutput output(out, options);
1461     (new(pool) CYEncodedType(Decode(pool, internal->type_)))->Output(output, CYNoFlags);
1462     return CYCastJSValue(context, CYJSString(out.str().c_str()));
1463 } CYCatch(NULL) }
1464
1465 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1466     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1467 }
1468
1469 static JSStaticFunction Pointer_staticFunctions[4] = {
1470     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1471     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1472     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1473     {NULL, NULL, 0}
1474 };
1475
1476 static JSStaticValue Pointer_staticValues[2] = {
1477     {"type", &Pointer_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1478     {NULL, NULL, NULL, 0}
1479 };
1480
1481 static JSStaticFunction Struct_staticFunctions[2] = {
1482     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1483     {NULL, NULL, 0}
1484 };
1485
1486 static JSStaticFunction Functor_staticFunctions[4] = {
1487     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1488     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1489     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1490     {NULL, NULL, 0}
1491 };
1492
1493 namespace cy {
1494     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1495 }
1496
1497 static JSStaticValue Functor_staticValues[2] = {
1498     {"type", &Functor_getProperty_type, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1499     {NULL, NULL, NULL, 0}
1500 };
1501
1502 namespace cy {
1503     JSStaticValue const * const Functor::StaticValues = Functor_staticValues;
1504 }
1505
1506 static JSStaticValue Type_staticValues[4] = {
1507     {"alignment", &Type_getProperty_alignment, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1508     {"name", &Type_getProperty_name, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1509     {"size", &Type_getProperty_size, NULL, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1510     {NULL, NULL, NULL, 0}
1511 };
1512
1513 static JSStaticFunction Type_staticFunctions[14] = {
1514     {"arrayOf", &Type_callAsFunction_arrayOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1515     {"blockWith", &Type_callAsFunction_blockWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1516     {"constant", &Type_callAsFunction_constant, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1517     {"functionWith", &Type_callAsFunction_functionWith, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1518     {"long", &Type_callAsFunction_long, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1519     {"pointerTo", &Type_callAsFunction_pointerTo, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1520     {"short", &Type_callAsFunction_short, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1521     {"signed", &Type_callAsFunction_signed, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1522     {"withName", &Type_callAsFunction_withName, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1523     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1524     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1525     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1526     {"unsigned", &Type_callAsFunction_unsigned, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1527     {NULL, NULL, 0}
1528 };
1529
1530 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1531
1532 void CYSetArgs(int argc, const char *argv[]) {
1533     JSContextRef context(CYGetJSContext());
1534     JSValueRef args[argc];
1535     for (int i(0); i != argc; ++i)
1536         args[i] = CYCastJSValue(context, argv[i]);
1537
1538     JSObjectRef array;
1539     if (JSObjectMakeArray$ != NULL)
1540         array = _jsccall(*JSObjectMakeArray$, context, argc, args);
1541     else {
1542         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1543         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1544         array = CYCastJSObject(context, value);
1545     }
1546
1547     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1548     CYSetProperty(context, System, CYJSString("args"), array);
1549 }
1550
1551 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1552     return JSContextGetGlobalObject(context);
1553 }
1554
1555 // XXX: this is neither exceptin safe nor even terribly sane
1556 class ExecutionHandle {
1557   private:
1558     JSContextRef context_;
1559     std::vector<void *> handles_;
1560
1561   public:
1562     ExecutionHandle(JSContextRef context) :
1563         context_(context)
1564     {
1565         handles_.resize(GetHooks().size());
1566         for (size_t i(0); i != GetHooks().size(); ++i) {
1567             CYHook *hook(GetHooks()[i]);
1568             if (hook->ExecuteStart != NULL)
1569                 handles_[i] = (*hook->ExecuteStart)(context_);
1570             else
1571                 handles_[i] = NULL;
1572         }
1573     }
1574
1575     ~ExecutionHandle() {
1576         for (size_t i(GetHooks().size()); i != 0; --i) {
1577             CYHook *hook(GetHooks()[i-1]);
1578             if (hook->ExecuteEnd != NULL)
1579                 (*hook->ExecuteEnd)(context_, handles_[i-1]);
1580         }
1581     }
1582 };
1583
1584 const char *CYExecute(JSContextRef context, CYPool &pool, CYUTF8String code) {
1585     JSValueRef exception(NULL);
1586
1587     ExecutionHandle handle(context);
1588
1589     JSValueRef result; try {
1590         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1591     } catch (const char *error) {
1592         return error;
1593     }
1594
1595     if (exception != NULL) error:
1596         return CYPoolCString(pool, context, CYJSString(context, exception));
1597
1598     if (JSValueIsUndefined(context, result))
1599         return NULL;
1600
1601     const char *json; try {
1602         std::set<void *> objects;
1603         json = CYPoolCCYON(pool, context, result, objects, &exception);
1604     } catch (const char *error) {
1605         return error;
1606     }
1607
1608     if (exception != NULL)
1609         goto error;
1610
1611     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1612
1613     return json;
1614 }
1615
1616 static bool initialized_ = false;
1617
1618 void CYInitializeDynamic() {
1619     if (!initialized_)
1620         initialized_ = true;
1621     else return;
1622
1623     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1624     JSSynchronousGarbageCollectForDebugging$ = reinterpret_cast<void (*)(JSContextRef)>(dlsym(RTLD_DEFAULT, "JSSynchronousGarbageCollectForDebugging"));
1625
1626     JSClassDefinition definition;
1627
1628     definition = kJSClassDefinitionEmpty;
1629     definition.className = "All";
1630     definition.hasProperty = &All_hasProperty;
1631     definition.getProperty = &All_getProperty;
1632     definition.getPropertyNames = &All_getPropertyNames;
1633     All_ = JSClassCreate(&definition);
1634
1635     definition = kJSClassDefinitionEmpty;
1636     definition.className = "Context";
1637     definition.finalize = &CYFinalize;
1638     Context_ = JSClassCreate(&definition);
1639
1640     definition = kJSClassDefinitionEmpty;
1641     definition.className = "Functor";
1642     definition.staticFunctions = cy::Functor::StaticFunctions;
1643     definition.staticValues = Functor_staticValues;
1644     definition.callAsFunction = &Functor_callAsFunction;
1645     definition.finalize = &CYFinalize;
1646     Functor_ = JSClassCreate(&definition);
1647
1648     definition = kJSClassDefinitionEmpty;
1649     definition.className = "Pointer";
1650     definition.staticFunctions = Pointer_staticFunctions;
1651     definition.staticValues = Pointer_staticValues;
1652     definition.getProperty = &Pointer_getProperty;
1653     definition.setProperty = &Pointer_setProperty;
1654     definition.finalize = &CYFinalize;
1655     Pointer_ = JSClassCreate(&definition);
1656
1657     definition = kJSClassDefinitionEmpty;
1658     definition.className = "Struct";
1659     definition.staticFunctions = Struct_staticFunctions;
1660     definition.getProperty = &Struct_getProperty;
1661     definition.setProperty = &Struct_setProperty;
1662     definition.getPropertyNames = &Struct_getPropertyNames;
1663     definition.finalize = &CYFinalize;
1664     Struct_ = JSClassCreate(&definition);
1665
1666     definition = kJSClassDefinitionEmpty;
1667     definition.className = "Type";
1668     definition.staticValues = Type_staticValues;
1669     definition.staticFunctions = Type_staticFunctions;
1670     definition.callAsFunction = &Type_callAsFunction;
1671     definition.callAsConstructor = &Type_callAsConstructor;
1672     definition.finalize = &CYFinalize;
1673     Type_privateData::Class_ = JSClassCreate(&definition);
1674
1675     definition = kJSClassDefinitionEmpty;
1676     definition.className = "Global";
1677     //definition.getProperty = &Global_getProperty;
1678     Global_ = JSClassCreate(&definition);
1679
1680     Array_s = JSStringCreateWithUTF8CString("Array");
1681     cy_s = JSStringCreateWithUTF8CString("$cy");
1682     cyi_s = JSStringCreateWithUTF8CString("$cyi");
1683     length_s = JSStringCreateWithUTF8CString("length");
1684     message_s = JSStringCreateWithUTF8CString("message");
1685     name_s = JSStringCreateWithUTF8CString("name");
1686     pop_s = JSStringCreateWithUTF8CString("pop");
1687     prototype_s = JSStringCreateWithUTF8CString("prototype");
1688     push_s = JSStringCreateWithUTF8CString("push");
1689     splice_s = JSStringCreateWithUTF8CString("splice");
1690     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1691     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1692     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1693     toString_s = JSStringCreateWithUTF8CString("toString");
1694
1695     Result_ = JSStringCreateWithUTF8CString("_");
1696
1697     for (CYHook *hook : GetHooks())
1698         if (hook->Initialize != NULL)
1699             (*hook->Initialize)();
1700 }
1701
1702 void CYThrow(JSContextRef context, JSValueRef value) {
1703     if (value != NULL)
1704         throw CYJSError(context, value);
1705 }
1706
1707 const char *CYJSError::PoolCString(CYPool &pool) const {
1708     std::set<void *> objects;
1709     // XXX: this used to be CYPoolCString
1710     return CYPoolCCYON(pool, context_, value_, objects);
1711 }
1712
1713 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1714     // XXX: what if the context is different?
1715     return value_;
1716 }
1717
1718 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1719     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1720     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1721     return _jsccall(JSObjectCallAsConstructor, context, Error, 1, arguments);
1722 }
1723
1724 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1725     return CYCastJSError(context, message_);
1726 }
1727
1728 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1729     _assert(context != NULL);
1730
1731     CYPool pool;
1732
1733     va_list args;
1734     va_start(args, format);
1735     // XXX: there might be a beter way to think about this
1736     const char *message(pool.vsprintf(64, format, args));
1737     va_end(args);
1738
1739     value_ = CYCastJSError(context, message);
1740 }
1741
1742 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1743     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1744 }
1745
1746 extern "C" bool CydgetMemoryParse(const uint16_t **data, size_t *size);
1747
1748 void *CYMapFile(const char *path, size_t *psize) {
1749     int fd(_syscall_(open(path, O_RDONLY), 1, {ENOENT}));
1750     if (fd == -1)
1751         return NULL;
1752
1753     struct stat stat;
1754     _syscall(fstat(fd, &stat));
1755     size_t size(stat.st_size);
1756
1757     *psize = size;
1758
1759     void *base;
1760     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
1761
1762     _syscall(close(fd));
1763     return base;
1764 }
1765
1766 static JSValueRef require(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1767     _assert(count == 1);
1768     CYPool pool;
1769
1770     Dl_info addr;
1771     _assert(dladdr(reinterpret_cast<void *>(&require), &addr) != 0);
1772     char *lib(pool.strdup(addr.dli_fname));
1773
1774     char *slash(strrchr(lib, '/'));
1775     _assert(slash != NULL);
1776     *slash = '\0';
1777
1778     CYJSString property("exports");
1779     JSObjectRef module;
1780
1781     const char *name(CYPoolCString(pool, context, arguments[0]));
1782     const char *path(pool.strcat(lib, "/cycript0.9/", name, ".cy", NULL));
1783
1784     CYJSString key(path);
1785     JSObjectRef modules(CYGetCachedObject(context, CYJSString("modules")));
1786     JSValueRef cache(CYGetProperty(context, modules, key));
1787
1788     if (!JSValueIsUndefined(context, cache))
1789         module = CYCastJSObject(context, cache);
1790     else {
1791         CYUTF8String code;
1792         code.data = reinterpret_cast<char *>(CYMapFile(path, &code.size));
1793
1794         if (code.data == NULL) {
1795             if (strchr(name, '/') == NULL && (
1796 #ifdef __APPLE__
1797                 dlopen(pool.strcat("/System/Library/Frameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1798                 dlopen(pool.strcat("/System/Library/PrivateFrameworks/", name, ".framework/", name, NULL), RTLD_LAZY | RTLD_GLOBAL) != NULL ||
1799 #endif
1800             false))
1801                 return CYJSUndefined(NULL);
1802
1803             CYThrow("Can't find module: %s", name);
1804         }
1805
1806         module = JSObjectMake(context, NULL, NULL);
1807         CYSetProperty(context, modules, key, module);
1808
1809         JSObjectRef exports(JSObjectMake(context, NULL, NULL));
1810         CYSetProperty(context, module, property, exports);
1811
1812         std::stringstream wrap;
1813         wrap << "(function (exports, require, module) { " << code << "\n});";
1814         code = CYPoolCode(pool, wrap);
1815
1816         JSValueRef value(_jsccall(JSEvaluateScript, context, CYJSString(code), NULL, NULL, 0));
1817         JSObjectRef function(CYCastJSObject(context, value));
1818
1819         JSValueRef arguments[3] = { exports, JSObjectMakeFunctionWithCallback(context, CYJSString("require"), &require), module };
1820         CYCallAsFunction(context, function, NULL, 3, arguments);
1821     }
1822
1823     return CYGetProperty(context, module, property);
1824 } CYCatch(NULL) }
1825
1826 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1827     CYInitializeDynamic();
1828
1829     JSObjectRef global(CYGetGlobalObject(context));
1830
1831     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1832     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1833
1834 /* Cache Globals {{{ */
1835     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1836     CYSetProperty(context, cy, CYJSString("Array"), Array);
1837
1838     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1839     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1840
1841     JSObjectRef Boolean(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Boolean"))));
1842     CYSetProperty(context, cy, CYJSString("Boolean"), Boolean);
1843
1844     JSObjectRef Boolean_prototype(CYCastJSObject(context, CYGetProperty(context, Boolean, prototype_s)));
1845     CYSetProperty(context, cy, CYJSString("Boolean_prototype"), Boolean_prototype);
1846
1847     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1848     CYSetProperty(context, cy, CYJSString("Error"), Error);
1849
1850     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1851     CYSetProperty(context, cy, CYJSString("Function"), Function);
1852
1853     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1854     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1855
1856     JSObjectRef Number(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Number"))));
1857     CYSetProperty(context, cy, CYJSString("Number"), Number);
1858
1859     JSObjectRef Number_prototype(CYCastJSObject(context, CYGetProperty(context, Number, prototype_s)));
1860     CYSetProperty(context, cy, CYJSString("Number_prototype"), Number_prototype);
1861
1862     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1863     CYSetProperty(context, cy, CYJSString("Object"), Object);
1864
1865     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1866     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1867
1868     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1869     CYSetProperty(context, cy, CYJSString("String"), String);
1870
1871     JSObjectRef String_prototype(CYCastJSObject(context, CYGetProperty(context, String, prototype_s)));
1872     CYSetProperty(context, cy, CYJSString("String_prototype"), String_prototype);
1873 /* }}} */
1874
1875     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1876     CYSetProperty(context, String_prototype, toCYON_s, &String_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1877
1878     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1879     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1880     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1881
1882     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1883     CYSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1884     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1885
1886     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1887     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1888
1889     JSObjectRef modules(JSObjectMake(context, NULL, NULL));
1890     CYSetProperty(context, cy, CYJSString("modules"), modules);
1891
1892     JSObjectRef all(JSObjectMake(context, All_, NULL));
1893     CYSetProperty(context, cycript, CYJSString("all"), all);
1894
1895     JSObjectRef alls(_jsccall(JSObjectCallAsConstructor, context, Array, 0, NULL));
1896     CYSetProperty(context, cycript, CYJSString("alls"), alls);
1897
1898     if (true) {
1899         JSObjectRef last(NULL), curr(global);
1900
1901         goto next; for (JSValueRef next;;) {
1902             if (JSValueIsNull(context, next))
1903                 break;
1904             last = curr;
1905             curr = CYCastJSObject(context, next);
1906           next:
1907             next = JSObjectGetPrototype(context, curr);
1908         }
1909
1910         CYSetPrototype(context, last, all);
1911     }
1912
1913     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1914
1915     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1916     CYSetProperty(context, cy, CYJSString("System"), System);
1917
1918     CYSetProperty(context, all, CYJSString("require"), &require, kJSPropertyAttributeDontEnum);
1919
1920     CYSetProperty(context, global, CYJSString("system"), System);
1921     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1922     //CYSetProperty(context, System, CYJSString("global"), global);
1923     CYSetProperty(context, System, CYJSString("print"), &System_print);
1924
1925     if (CYBridgeEntry *entry = CYBridgeHash("1dlerror", 8))
1926         entry->cache_ = new cy::Functor(entry->value_, reinterpret_cast<void (*)()>(&dlerror));
1927
1928     for (CYHook *hook : GetHooks())
1929         if (hook->SetupContext != NULL)
1930             (*hook->SetupContext)(context);
1931
1932     CYArrayPush(context, alls, cycript);
1933 }
1934
1935 static JSGlobalContextRef context_;
1936
1937 JSGlobalContextRef CYGetJSContext() {
1938     CYInitializeDynamic();
1939
1940     if (context_ == NULL) {
1941         context_ = JSGlobalContextCreate(Global_);
1942         CYSetupContext(context_);
1943     }
1944
1945     return context_;
1946 }
1947
1948 void CYDestroyContext() {
1949     if (context_ == NULL)
1950         return;
1951     JSGlobalContextRelease(context_);
1952     context_ = NULL;
1953 }