runtime/JSGlobalObject.cpp

   1 /*
   2  * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
   3  * Copyright (C) 2008 Cameron Zwarich (cwzwarich@uwaterloo.ca)
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1.  Redistributions of source code must retain the above copyright
  10  *     notice, this list of conditions and the following disclaimer.
  11  * 2.  Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  15  *     its contributors may be used to endorse or promote products derived
  16  *     from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "config.h"
  31 #include "JSGlobalObject.h"
  32
  33 #include "JSCallbackConstructor.h"
  34 #include "JSCallbackFunction.h"
  35 #include "JSCallbackObject.h"
  36
  37 #include "Arguments.h"
  38 #include "ArrayConstructor.h"
  39 #include "ArrayPrototype.h"
  40 #include "BooleanConstructor.h"
  41 #include "BooleanPrototype.h"
  42 #include "CodeBlock.h"
  43 #include "DateConstructor.h"
  44 #include "DatePrototype.h"
  45 #include "ErrorConstructor.h"
  46 #include "ErrorPrototype.h"
  47 #include "FunctionConstructor.h"
  48 #include "FunctionPrototype.h"
  49 #include "GlobalEvalFunction.h"
  50 #include "JSGlobalObjectFunctions.h"
  51 #include "JSLock.h"
  52 #include "Interpreter.h"
  53 #include "MathObject.h"
  54 #include "NativeErrorConstructor.h"
  55 #include "NativeErrorPrototype.h"
  56 #include "NumberConstructor.h"
  57 #include "NumberPrototype.h"
  58 #include "ObjectConstructor.h"
  59 #include "ObjectPrototype.h"
  60 #include "Profiler.h"
  61 #include "PrototypeFunction.h"
  62 #include "RegExpConstructor.h"
  63 #include "RegExpMatchesArray.h"
  64 #include "RegExpObject.h"
  65 #include "RegExpPrototype.h"
  66 #include "ScopeChainMark.h"
  67 #include "StringConstructor.h"
  68 #include "StringPrototype.h"
  69 #include "Debugger.h"
  70
  71 namespace JSC {
  72
  73 ASSERT_CLASS_FITS_IN_CELL(JSGlobalObject);
  74
  75 // Default number of ticks before a timeout check should be done.
  76 static const int initialTickCountThreshold = 255;
  77
  78 // Preferred number of milliseconds between each timeout check
  79 static const int preferredScriptCheckTimeInterval = 1000;
  80
  81 static inline void markIfNeeded(JSValuePtr v)
  82 {
  83     if (v && !v.marked())
  84         v.mark();
  85 }
  86
  87 static inline void markIfNeeded(const RefPtr<Structure>& s)
  88 {
  89     if (s)
  90         s->mark();
  91 }
  92
  93 JSGlobalObject::~JSGlobalObject()
  94 {
  95     ASSERT(JSLock::currentThreadIsHoldingLock());
  96
  97     if (d()->debugger)
  98         d()->debugger->detach(this);
  99
 100     Profiler** profiler = Profiler::enabledProfilerReference();
 101     if (UNLIKELY(*profiler != 0)) {
 102         (*profiler)->stopProfiling(globalExec(), UString());
 103     }
 104
 105     d()->next->d()->prev = d()->prev;
 106     d()->prev->d()->next = d()->next;
 107     JSGlobalObject*& headObject = head();
 108     if (headObject == this)
 109         headObject = d()->next;
 110     if (headObject == this)
 111         headObject = 0;
 112
 113     HashSet<ProgramCodeBlock*>::const_iterator end = codeBlocks().end();
 114     for (HashSet<ProgramCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
 115         (*it)->clearGlobalObject();
 116
 117     RegisterFile& registerFile = globalData()->interpreter->registerFile();
 118     if (registerFile.globalObject() == this) {
 119         registerFile.setGlobalObject(0);
 120         registerFile.setNumGlobals(0);
 121     }
 122     delete d();
 123 }
 124
 125 void JSGlobalObject::init(JSObject* thisValue)
 126 {
 127     ASSERT(JSLock::currentThreadIsHoldingLock());
 128
 129     d()->globalData = Heap::heap(this)->globalData();
 130     d()->globalScopeChain = ScopeChain(this, d()->globalData.get(), thisValue);
 131
 132     JSGlobalObject::globalExec()->init(0, 0, d()->globalScopeChain.node(), CallFrame::noCaller(), 0, 0, 0);
 133
 134     if (JSGlobalObject*& headObject = head()) {
 135         d()->prev = headObject;
 136         d()->next = headObject->d()->next;
 137         headObject->d()->next->d()->prev = this;
 138         headObject->d()->next = this;
 139     } else
 140         headObject = d()->next = d()->prev = this;
 141
 142     d()->recursion = 0;
 143     d()->debugger = 0;
 144
 145     d()->profileGroup = 0;
 146
 147     reset(prototype());
 148 }
 149
 150 void JSGlobalObject::put(ExecState* exec, const Identifier& propertyName, JSValuePtr value, PutPropertySlot& slot)
 151 {
 152     ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
 153
 154     if (symbolTablePut(propertyName, value))
 155         return;
 156     JSVariableObject::put(exec, propertyName, value, slot);
 157 }
 158
 159 void JSGlobalObject::putWithAttributes(ExecState* exec, const Identifier& propertyName, JSValuePtr value, unsigned attributes)
 160 {
 161     ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
 162
 163     if (symbolTablePutWithAttributes(propertyName, value, attributes))
 164         return;
 165
 166     JSValuePtr valueBefore = getDirect(propertyName);
 167     PutPropertySlot slot;
 168     JSVariableObject::put(exec, propertyName, value, slot);
 169     if (!valueBefore) {
 170         JSValuePtr valueAfter = getDirect(propertyName);
 171         if (valueAfter)
 172             putDirect(propertyName, valueAfter, attributes);
 173     }
 174 }
 175
 176 void JSGlobalObject::defineGetter(ExecState* exec, const Identifier& propertyName, JSObject* getterFunc)
 177 {
 178     PropertySlot slot;
 179     if (!symbolTableGet(propertyName, slot))
 180         JSVariableObject::defineGetter(exec, propertyName, getterFunc);
 181 }
 182
 183 void JSGlobalObject::defineSetter(ExecState* exec, const Identifier& propertyName, JSObject* setterFunc)
 184 {
 185     PropertySlot slot;
 186     if (!symbolTableGet(propertyName, slot))
 187         JSVariableObject::defineSetter(exec, propertyName, setterFunc);
 188 }
 189
 190 static inline JSObject* lastInPrototypeChain(JSObject* object)
 191 {
 192     JSObject* o = object;
 193     while (o->prototype().isObject())
 194         o = asObject(o->prototype());
 195     return o;
 196 }
 197
 198 void JSGlobalObject::reset(JSValuePtr prototype)
 199 {
 200     ExecState* exec = JSGlobalObject::globalExec();
 201
 202     // Prototypes
 203
 204     d()->functionPrototype = new (exec) FunctionPrototype(exec, FunctionPrototype::createStructure(jsNull())); // The real prototype will be set once ObjectPrototype is created.
 205     d()->prototypeFunctionStructure = PrototypeFunction::createStructure(d()->functionPrototype);
 206     d()->functionPrototype->addFunctionProperties(exec, d()->prototypeFunctionStructure.get());
 207     d()->objectPrototype = new (exec) ObjectPrototype(exec, ObjectPrototype::createStructure(jsNull()), d()->prototypeFunctionStructure.get());
 208     d()->functionPrototype->structure()->setPrototypeWithoutTransition(d()->objectPrototype);
 209
 210     d()->emptyObjectStructure = d()->objectPrototype->inheritorID();
 211
 212     d()->functionStructure = JSFunction::createStructure(d()->functionPrototype);
 213     d()->callbackFunctionStructure = JSCallbackFunction::createStructure(d()->functionPrototype);
 214     d()->argumentsStructure = Arguments::createStructure(d()->objectPrototype);
 215     d()->callbackConstructorStructure = JSCallbackConstructor::createStructure(d()->objectPrototype);
 216     d()->callbackObjectStructure = JSCallbackObject<JSObject>::createStructure(d()->objectPrototype);
 217
 218     d()->arrayPrototype = new (exec) ArrayPrototype(ArrayPrototype::createStructure(d()->objectPrototype));
 219     d()->arrayStructure = JSArray::createStructure(d()->arrayPrototype);
 220     d()->regExpMatchesArrayStructure = RegExpMatchesArray::createStructure(d()->arrayPrototype);
 221
 222     d()->stringPrototype = new (exec) StringPrototype(exec, StringPrototype::createStructure(d()->objectPrototype));
 223     d()->stringObjectStructure = StringObject::createStructure(d()->stringPrototype);
 224
 225     d()->booleanPrototype = new (exec) BooleanPrototype(exec, BooleanPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
 226     d()->booleanObjectStructure = BooleanObject::createStructure(d()->booleanPrototype);
 227
 228     d()->numberPrototype = new (exec) NumberPrototype(exec, NumberPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
 229     d()->numberObjectStructure = NumberObject::createStructure(d()->numberPrototype);
 230
 231     d()->datePrototype = new (exec) DatePrototype(exec, DatePrototype::createStructure(d()->objectPrototype));
 232     d()->dateStructure = DateInstance::createStructure(d()->datePrototype);
 233
 234     d()->regExpPrototype = new (exec) RegExpPrototype(exec, RegExpPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
 235     d()->regExpStructure = RegExpObject::createStructure(d()->regExpPrototype);
 236
 237     ErrorPrototype* errorPrototype = new (exec) ErrorPrototype(exec, ErrorPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
 238     d()->errorStructure = ErrorInstance::createStructure(errorPrototype);
 239
 240     RefPtr<Structure> nativeErrorPrototypeStructure = NativeErrorPrototype::createStructure(errorPrototype);
 241
 242     NativeErrorPrototype* evalErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "EvalError", "EvalError");
 243     NativeErrorPrototype* rangeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "RangeError", "RangeError");
 244     NativeErrorPrototype* referenceErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "ReferenceError", "ReferenceError");
 245     NativeErrorPrototype* syntaxErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "SyntaxError", "SyntaxError");
 246     NativeErrorPrototype* typeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "TypeError", "TypeError");
 247     NativeErrorPrototype* URIErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "URIError", "URIError");
 248
 249     // Constructors
 250
 251     JSValuePtr objectConstructor = new (exec) ObjectConstructor(exec, ObjectConstructor::createStructure(d()->functionPrototype), d()->objectPrototype);
 252     JSValuePtr functionConstructor = new (exec) FunctionConstructor(exec, FunctionConstructor::createStructure(d()->functionPrototype), d()->functionPrototype);
 253     JSValuePtr arrayConstructor = new (exec) ArrayConstructor(exec, ArrayConstructor::createStructure(d()->functionPrototype), d()->arrayPrototype);
 254     JSValuePtr stringConstructor = new (exec) StringConstructor(exec, StringConstructor::createStructure(d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->stringPrototype);
 255     JSValuePtr booleanConstructor = new (exec) BooleanConstructor(exec, BooleanConstructor::createStructure(d()->functionPrototype), d()->booleanPrototype);
 256     JSValuePtr numberConstructor = new (exec) NumberConstructor(exec, NumberConstructor::createStructure(d()->functionPrototype), d()->numberPrototype);
 257     JSValuePtr dateConstructor = new (exec) DateConstructor(exec, DateConstructor::createStructure(d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->datePrototype);
 258
 259     d()->regExpConstructor = new (exec) RegExpConstructor(exec, RegExpConstructor::createStructure(d()->functionPrototype), d()->regExpPrototype);
 260
 261     d()->errorConstructor = new (exec) ErrorConstructor(exec, ErrorConstructor::createStructure(d()->functionPrototype), errorPrototype);
 262
 263     RefPtr<Structure> nativeErrorStructure = NativeErrorConstructor::createStructure(d()->functionPrototype);
 264
 265     d()->evalErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, evalErrorPrototype);
 266     d()->rangeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, rangeErrorPrototype);
 267     d()->referenceErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, referenceErrorPrototype);
 268     d()->syntaxErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, syntaxErrorPrototype);
 269     d()->typeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, typeErrorPrototype);
 270     d()->URIErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, URIErrorPrototype);
 271
 272     d()->objectPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, objectConstructor, DontEnum);
 273     d()->functionPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, functionConstructor, DontEnum);
 274     d()->arrayPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, arrayConstructor, DontEnum);
 275     d()->booleanPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, booleanConstructor, DontEnum);
 276     d()->stringPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, stringConstructor, DontEnum);
 277     d()->numberPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, numberConstructor, DontEnum);
 278     d()->datePrototype->putDirectWithoutTransition(exec->propertyNames().constructor, dateConstructor, DontEnum);
 279     d()->regExpPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, d()->regExpConstructor, DontEnum);
 280     errorPrototype->putDirectWithoutTransition(exec->propertyNames().constructor, d()->errorConstructor, DontEnum);
 281
 282     evalErrorPrototype->putDirect(exec->propertyNames().constructor, d()->evalErrorConstructor, DontEnum);
 283     rangeErrorPrototype->putDirect(exec->propertyNames().constructor, d()->rangeErrorConstructor, DontEnum);
 284     referenceErrorPrototype->putDirect(exec->propertyNames().constructor, d()->referenceErrorConstructor, DontEnum);
 285     syntaxErrorPrototype->putDirect(exec->propertyNames().constructor, d()->syntaxErrorConstructor, DontEnum);
 286     typeErrorPrototype->putDirect(exec->propertyNames().constructor, d()->typeErrorConstructor, DontEnum);
 287     URIErrorPrototype->putDirect(exec->propertyNames().constructor, d()->URIErrorConstructor, DontEnum);
 288
 289     // Set global constructors
 290
 291     // FIXME: These properties could be handled by a static hash table.
 292
 293     putDirectWithoutTransition(Identifier(exec, "Object"), objectConstructor, DontEnum);
 294     putDirectWithoutTransition(Identifier(exec, "Function"), functionConstructor, DontEnum);
 295     putDirectWithoutTransition(Identifier(exec, "Array"), arrayConstructor, DontEnum);
 296     putDirectWithoutTransition(Identifier(exec, "Boolean"), booleanConstructor, DontEnum);
 297     putDirectWithoutTransition(Identifier(exec, "String"), stringConstructor, DontEnum);
 298     putDirectWithoutTransition(Identifier(exec, "Number"), numberConstructor, DontEnum);
 299     putDirectWithoutTransition(Identifier(exec, "Date"), dateConstructor, DontEnum);
 300     putDirectWithoutTransition(Identifier(exec, "RegExp"), d()->regExpConstructor, DontEnum);
 301     putDirectWithoutTransition(Identifier(exec, "Error"), d()->errorConstructor, DontEnum);
 302     putDirectWithoutTransition(Identifier(exec, "EvalError"), d()->evalErrorConstructor);
 303     putDirectWithoutTransition(Identifier(exec, "RangeError"), d()->rangeErrorConstructor);
 304     putDirectWithoutTransition(Identifier(exec, "ReferenceError"), d()->referenceErrorConstructor);
 305     putDirectWithoutTransition(Identifier(exec, "SyntaxError"), d()->syntaxErrorConstructor);
 306     putDirectWithoutTransition(Identifier(exec, "TypeError"), d()->typeErrorConstructor);
 307     putDirectWithoutTransition(Identifier(exec, "URIError"), d()->URIErrorConstructor);
 308
 309     // Set global values.
 310     GlobalPropertyInfo staticGlobals[] = {
 311         GlobalPropertyInfo(Identifier(exec, "Math"), new (exec) MathObject(exec, MathObject::createStructure(d()->objectPrototype)), DontEnum | DontDelete),
 312         GlobalPropertyInfo(Identifier(exec, "NaN"), jsNaN(exec), DontEnum | DontDelete),
 313         GlobalPropertyInfo(Identifier(exec, "Infinity"), jsNumber(exec, Inf), DontEnum | DontDelete),
 314         GlobalPropertyInfo(Identifier(exec, "undefined"), jsUndefined(), DontEnum | DontDelete)
 315     };
 316
 317     addStaticGlobals(staticGlobals, sizeof(staticGlobals) / sizeof(GlobalPropertyInfo));
 318
 319     // Set global functions.
 320
 321     d()->evalFunction = new (exec) GlobalEvalFunction(exec, GlobalEvalFunction::createStructure(d()->functionPrototype), 1, exec->propertyNames().eval, globalFuncEval, this);
 322     putDirectFunctionWithoutTransition(exec, d()->evalFunction, DontEnum);
 323     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 2, Identifier(exec, "parseInt"), globalFuncParseInt), DontEnum);
 324     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "parseFloat"), globalFuncParseFloat), DontEnum);
 325     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isNaN"), globalFuncIsNaN), DontEnum);
 326     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isFinite"), globalFuncIsFinite), DontEnum);
 327     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "escape"), globalFuncEscape), DontEnum);
 328     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "unescape"), globalFuncUnescape), DontEnum);
 329     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURI"), globalFuncDecodeURI), DontEnum);
 330     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURIComponent"), globalFuncDecodeURIComponent), DontEnum);
 331     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURI"), globalFuncEncodeURI), DontEnum);
 332     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURIComponent"), globalFuncEncodeURIComponent), DontEnum);
 333 #ifndef NDEBUG
 334     putDirectFunctionWithoutTransition(exec, new (exec) PrototypeFunction(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "jscprint"), globalFuncJSCPrint), DontEnum);
 335 #endif
 336
 337     resetPrototype(prototype);
 338 }
 339
 340 // Set prototype, and also insert the object prototype at the end of the chain.
 341 void JSGlobalObject::resetPrototype(JSValuePtr prototype)
 342 {
 343     setPrototype(prototype);
 344     lastInPrototypeChain(this)->setPrototype(d()->objectPrototype);
 345 }
 346
 347 void JSGlobalObject::setTimeoutTime(unsigned timeoutTime)
 348 {
 349     globalData()->interpreter->setTimeoutTime(timeoutTime);
 350 }
 351
 352 void JSGlobalObject::startTimeoutCheck()
 353 {
 354     globalData()->interpreter->startTimeoutCheck();
 355 }
 356
 357 void JSGlobalObject::stopTimeoutCheck()
 358 {
 359     globalData()->interpreter->stopTimeoutCheck();
 360 }
 361
 362 void JSGlobalObject::mark()
 363 {
 364     JSVariableObject::mark();
 365
 366     HashSet<ProgramCodeBlock*>::const_iterator end = codeBlocks().end();
 367     for (HashSet<ProgramCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
 368         (*it)->mark();
 369
 370     RegisterFile& registerFile = globalData()->interpreter->registerFile();
 371     if (registerFile.globalObject() == this)
 372         registerFile.markGlobals(&globalData()->heap);
 373
 374     markIfNeeded(d()->regExpConstructor);
 375     markIfNeeded(d()->errorConstructor);
 376     markIfNeeded(d()->evalErrorConstructor);
 377     markIfNeeded(d()->rangeErrorConstructor);
 378     markIfNeeded(d()->referenceErrorConstructor);
 379     markIfNeeded(d()->syntaxErrorConstructor);
 380     markIfNeeded(d()->typeErrorConstructor);
 381     markIfNeeded(d()->URIErrorConstructor);
 382
 383     markIfNeeded(d()->evalFunction);
 384
 385     markIfNeeded(d()->objectPrototype);
 386     markIfNeeded(d()->functionPrototype);
 387     markIfNeeded(d()->arrayPrototype);
 388     markIfNeeded(d()->booleanPrototype);
 389     markIfNeeded(d()->stringPrototype);
 390     markIfNeeded(d()->numberPrototype);
 391     markIfNeeded(d()->datePrototype);
 392     markIfNeeded(d()->regExpPrototype);
 393
 394     markIfNeeded(d()->errorStructure);
 395
 396     // No need to mark the other structures, because their prototypes are all
 397     // guaranteed to be referenced elsewhere.
 398
 399     Register* registerArray = d()->registerArray.get();
 400     if (!registerArray)
 401         return;
 402
 403     size_t size = d()->registerArraySize;
 404     for (size_t i = 0; i < size; ++i) {
 405         Register& r = registerArray[i];
 406         if (!r.marked())
 407             r.mark();
 408     }
 409 }
 410
 411 ExecState* JSGlobalObject::globalExec()
 412 {
 413     return CallFrame::create(d()->globalCallFrame + RegisterFile::CallFrameHeaderSize);
 414 }
 415
 416 bool JSGlobalObject::isDynamicScope() const
 417 {
 418     return true;
 419 }
 420
 421 void JSGlobalObject::copyGlobalsFrom(RegisterFile& registerFile)
 422 {
 423     ASSERT(!d()->registerArray);
 424     ASSERT(!d()->registerArraySize);
 425
 426     int numGlobals = registerFile.numGlobals();
 427     if (!numGlobals) {
 428         d()->registers = 0;
 429         return;
 430     }
 431
 432     Register* registerArray = copyRegisterArray(registerFile.lastGlobal(), numGlobals);
 433     setRegisters(registerArray + numGlobals, registerArray, numGlobals);
 434 }
 435
 436 void JSGlobalObject::copyGlobalsTo(RegisterFile& registerFile)
 437 {
 438     JSGlobalObject* lastGlobalObject = registerFile.globalObject();
 439     if (lastGlobalObject && lastGlobalObject != this)
 440         lastGlobalObject->copyGlobalsFrom(registerFile);
 441
 442     registerFile.setGlobalObject(this);
 443     registerFile.setNumGlobals(symbolTable().size());
 444
 445     if (d()->registerArray) {
 446         memcpy(registerFile.start() - d()->registerArraySize, d()->registerArray.get(), d()->registerArraySize * sizeof(Register));
 447         setRegisters(registerFile.start(), 0, 0);
 448     }
 449 }
 450
 451 void* JSGlobalObject::operator new(size_t size, JSGlobalData* globalData)
 452 {
 453 #ifdef JAVASCRIPTCORE_BUILDING_ALL_IN_ONE_FILE
 454     return globalData->heap.inlineAllocate(size);
 455 #else
 456     return globalData->heap.allocate(size);
 457 #endif
 458 }
 459
 460 } // namespace JSC