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