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 "JSFunction.h"
  51 #include "JSGlobalObjectFunctions.h"
  52 #include "JSLock.h"
  53 #include "JSONObject.h"
  54 #include "Interpreter.h"
  55 #include "MathObject.h"
  56 #include "NativeErrorConstructor.h"
  57 #include "NativeErrorPrototype.h"
  58 #include "NumberConstructor.h"
  59 #include "NumberPrototype.h"
  60 #include "ObjectConstructor.h"
  61 #include "ObjectPrototype.h"
  62 #include "Profiler.h"
  63 #include "PrototypeFunction.h"
  64 #include "RegExpConstructor.h"
  65 #include "RegExpMatchesArray.h"
  66 #include "RegExpObject.h"
  67 #include "RegExpPrototype.h"
  68 #include "ScopeChainMark.h"
  69 #include "StringConstructor.h"
  70 #include "StringPrototype.h"
  71 #include "Debugger.h"
  72
  73 namespace JSC {
  74
  75 ASSERT_CLASS_FITS_IN_CELL(JSGlobalObject);
  76
  77 // Default number of ticks before a timeout check should be done.
  78 static const int initialTickCountThreshold = 255;
  79
  80 // Preferred number of milliseconds between each timeout check
  81 static const int preferredScriptCheckTimeInterval = 1000;
  82
  83 static inline void markIfNeeded(MarkStack& markStack, JSValue v)
  84 {
  85     if (v)
  86         markStack.append(v);
  87 }
  88
  89 static inline void markIfNeeded(MarkStack& markStack, const RefPtr<Structure>& s)
  90 {
  91     if (s)
  92         markIfNeeded(markStack, s->storedPrototype());
  93 }
  94
  95 JSGlobalObject::~JSGlobalObject()
  96 {
  97     ASSERT(JSLock::currentThreadIsHoldingLock());
  98
  99     if (d()->debugger)
 100         d()->debugger->detach(this);
 101
 102     Profiler** profiler = Profiler::enabledProfilerReference();
 103     if (UNLIKELY(*profiler != 0)) {
 104         (*profiler)->stopProfiling(globalExec(), UString());
 105     }
 106
 107     d()->next->d()->prev = d()->prev;
 108     d()->prev->d()->next = d()->next;
 109     JSGlobalObject*& headObject = head();
 110     if (headObject == this)
 111         headObject = d()->next;
 112     if (headObject == this)
 113         headObject = 0;
 114
 115     HashSet<GlobalCodeBlock*>::const_iterator end = codeBlocks().end();
 116     for (HashSet<GlobalCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
 117         (*it)->clearGlobalObject();
 118
 119     RegisterFile& registerFile = globalData()->interpreter->registerFile();
 120     if (registerFile.globalObject() == this) {
 121         registerFile.setGlobalObject(0);
 122         registerFile.setNumGlobals(0);
 123     }
 124     d()->destructor(d());
 125 }
 126
 127 void JSGlobalObject::init(JSObject* thisValue)
 128 {
 129     ASSERT(JSLock::currentThreadIsHoldingLock());
 130
 131     structure()->disableSpecificFunctionTracking();
 132
 133     d()->globalData = Heap::heap(this)->globalData();
 134     d()->globalScopeChain = ScopeChain(this, d()->globalData.get(), this, thisValue);
 135
 136     JSGlobalObject::globalExec()->init(0, 0, d()->globalScopeChain.node(), CallFrame::noCaller(), 0, 0, 0);
 137
 138     if (JSGlobalObject*& headObject = head()) {
 139         d()->prev = headObject;
 140         d()->next = headObject->d()->next;
 141         headObject->d()->next->d()->prev = this;
 142         headObject->d()->next = this;
 143     } else
 144         headObject = d()->next = d()->prev = this;
 145
 146     d()->recursion = 0;
 147     d()->debugger = 0;
 148
 149     d()->profileGroup = 0;
 150
 151     reset(prototype());
 152 }
 153
 154 void JSGlobalObject::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
 155 {
 156     ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
 157
 158     if (symbolTablePut(propertyName, value))
 159         return;
 160     JSVariableObject::put(exec, propertyName, value, slot);
 161 }
 162
 163 void JSGlobalObject::putWithAttributes(ExecState* exec, const Identifier& propertyName, JSValue value, unsigned attributes)
 164 {
 165     ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
 166
 167     if (symbolTablePutWithAttributes(propertyName, value, attributes))
 168         return;
 169
 170     JSValue valueBefore = getDirect(propertyName);
 171     PutPropertySlot slot;
 172     JSVariableObject::put(exec, propertyName, value, slot);
 173     if (!valueBefore) {
 174         JSValue valueAfter = getDirect(propertyName);
 175         if (valueAfter)
 176             JSObject::putWithAttributes(exec, propertyName, valueAfter, attributes);
 177     }
 178 }
 179
 180 void JSGlobalObject::defineGetter(ExecState* exec, const Identifier& propertyName, JSObject* getterFunc, unsigned attributes)
 181 {
 182     PropertySlot slot;
 183     if (!symbolTableGet(propertyName, slot))
 184         JSVariableObject::defineGetter(exec, propertyName, getterFunc, attributes);
 185 }
 186
 187 void JSGlobalObject::defineSetter(ExecState* exec, const Identifier& propertyName, JSObject* setterFunc, unsigned attributes)
 188 {
 189     PropertySlot slot;
 190     if (!symbolTableGet(propertyName, slot))
 191         JSVariableObject::defineSetter(exec, propertyName, setterFunc, attributes);
 192 }
 193
 194 static inline JSObject* lastInPrototypeChain(JSObject* object)
 195 {
 196     JSObject* o = object;
 197     while (o->prototype().isObject())
 198         o = asObject(o->prototype());
 199     return o;
 200 }
 201
 202 void JSGlobalObject::reset(JSValue prototype)
 203 {
 204     ExecState* exec = JSGlobalObject::globalExec();
 205
 206     // Prototypes
 207
 208     d()->functionPrototype = new (exec) FunctionPrototype(exec, FunctionPrototype::createStructure(jsNull())); // The real prototype will be set once ObjectPrototype is created.
 209     d()->prototypeFunctionStructure = PrototypeFunction::createStructure(d()->functionPrototype);
 210     NativeFunctionWrapper* callFunction = 0;
 211     NativeFunctionWrapper* applyFunction = 0;
 212     d()->functionPrototype->addFunctionProperties(exec, d()->prototypeFunctionStructure.get(), &callFunction, &applyFunction);
 213     d()->callFunction = callFunction;
 214     d()->applyFunction = applyFunction;
 215     d()->objectPrototype = new (exec) ObjectPrototype(exec, ObjectPrototype::createStructure(jsNull()), d()->prototypeFunctionStructure.get());
 216     d()->functionPrototype->structure()->setPrototypeWithoutTransition(d()->objectPrototype);
 217
 218     d()->emptyObjectStructure = d()->objectPrototype->inheritorID();
 219
 220     d()->functionStructure = JSFunction::createStructure(d()->functionPrototype);
 221     d()->callbackFunctionStructure = JSCallbackFunction::createStructure(d()->functionPrototype);
 222     d()->argumentsStructure = Arguments::createStructure(d()->objectPrototype);
 223     d()->callbackConstructorStructure = JSCallbackConstructor::createStructure(d()->objectPrototype);
 224     d()->callbackObjectStructure = JSCallbackObject<JSObject>::createStructure(d()->objectPrototype);
 225
 226     d()->arrayPrototype = new (exec) ArrayPrototype(ArrayPrototype::createStructure(d()->objectPrototype));
 227     d()->arrayStructure = JSArray::createStructure(d()->arrayPrototype);
 228     d()->regExpMatchesArrayStructure = RegExpMatchesArray::createStructure(d()->arrayPrototype);
 229
 230     d()->stringPrototype = new (exec) StringPrototype(exec, StringPrototype::createStructure(d()->objectPrototype));
 231     d()->stringObjectStructure = StringObject::createStructure(d()->stringPrototype);
 232
 233     d()->booleanPrototype = new (exec) BooleanPrototype(exec, BooleanPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
 234     d()->booleanObjectStructure = BooleanObject::createStructure(d()->booleanPrototype);
 235
 236     d()->numberPrototype = new (exec) NumberPrototype(exec, NumberPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
 237     d()->numberObjectStructure = NumberObject::createStructure(d()->numberPrototype);
 238
 239     d()->datePrototype = new (exec) DatePrototype(exec, DatePrototype::createStructure(d()->objectPrototype));
 240     d()->dateStructure = DateInstance::createStructure(d()->datePrototype);
 241
 242     d()->regExpPrototype = new (exec) RegExpPrototype(exec, RegExpPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
 243     d()->regExpStructure = RegExpObject::createStructure(d()->regExpPrototype);
 244
 245     d()->methodCallDummy = constructEmptyObject(exec);
 246
 247     ErrorPrototype* errorPrototype = new (exec) ErrorPrototype(exec, ErrorPrototype::createStructure(d()->objectPrototype), d()->prototypeFunctionStructure.get());
 248     d()->errorStructure = ErrorInstance::createStructure(errorPrototype);
 249
 250     RefPtr<Structure> nativeErrorPrototypeStructure = NativeErrorPrototype::createStructure(errorPrototype);
 251
 252     NativeErrorPrototype* evalErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "EvalError", "EvalError");
 253     NativeErrorPrototype* rangeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "RangeError", "RangeError");
 254     NativeErrorPrototype* referenceErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "ReferenceError", "ReferenceError");
 255     NativeErrorPrototype* syntaxErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "SyntaxError", "SyntaxError");
 256     NativeErrorPrototype* typeErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "TypeError", "TypeError");
 257     NativeErrorPrototype* URIErrorPrototype = new (exec) NativeErrorPrototype(exec, nativeErrorPrototypeStructure, "URIError", "URIError");
 258
 259     // Constructors
 260
 261     JSCell* objectConstructor = new (exec) ObjectConstructor(exec, ObjectConstructor::createStructure(d()->functionPrototype), d()->objectPrototype, d()->prototypeFunctionStructure.get());
 262     JSCell* functionConstructor = new (exec) FunctionConstructor(exec, FunctionConstructor::createStructure(d()->functionPrototype), d()->functionPrototype);
 263     JSCell* arrayConstructor = new (exec) ArrayConstructor(exec, ArrayConstructor::createStructure(d()->functionPrototype), d()->arrayPrototype, d()->prototypeFunctionStructure.get());
 264     JSCell* stringConstructor = new (exec) StringConstructor(exec, StringConstructor::createStructure(d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->stringPrototype);
 265     JSCell* booleanConstructor = new (exec) BooleanConstructor(exec, BooleanConstructor::createStructure(d()->functionPrototype), d()->booleanPrototype);
 266     JSCell* numberConstructor = new (exec) NumberConstructor(exec, NumberConstructor::createStructure(d()->functionPrototype), d()->numberPrototype);
 267     JSCell* dateConstructor = new (exec) DateConstructor(exec, DateConstructor::createStructure(d()->functionPrototype), d()->prototypeFunctionStructure.get(), d()->datePrototype);
 268
 269     d()->regExpConstructor = new (exec) RegExpConstructor(exec, RegExpConstructor::createStructure(d()->functionPrototype), d()->regExpPrototype);
 270
 271     d()->errorConstructor = new (exec) ErrorConstructor(exec, ErrorConstructor::createStructure(d()->functionPrototype), errorPrototype);
 272
 273     RefPtr<Structure> nativeErrorStructure = NativeErrorConstructor::createStructure(d()->functionPrototype);
 274
 275     d()->evalErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, evalErrorPrototype);
 276     d()->rangeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, rangeErrorPrototype);
 277     d()->referenceErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, referenceErrorPrototype);
 278     d()->syntaxErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, syntaxErrorPrototype);
 279     d()->typeErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, typeErrorPrototype);
 280     d()->URIErrorConstructor = new (exec) NativeErrorConstructor(exec, nativeErrorStructure, URIErrorPrototype);
 281
 282     d()->objectPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, objectConstructor, DontEnum);
 283     d()->functionPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, functionConstructor, DontEnum);
 284     d()->arrayPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, arrayConstructor, DontEnum);
 285     d()->booleanPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, booleanConstructor, DontEnum);
 286     d()->stringPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, stringConstructor, DontEnum);
 287     d()->numberPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, numberConstructor, DontEnum);
 288     d()->datePrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, dateConstructor, DontEnum);
 289     d()->regExpPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, d()->regExpConstructor, DontEnum);
 290     errorPrototype->putDirectFunctionWithoutTransition(exec->propertyNames().constructor, d()->errorConstructor, DontEnum);
 291
 292     evalErrorPrototype->putDirect(exec->propertyNames().constructor, d()->evalErrorConstructor, DontEnum);
 293     rangeErrorPrototype->putDirect(exec->propertyNames().constructor, d()->rangeErrorConstructor, DontEnum);
 294     referenceErrorPrototype->putDirect(exec->propertyNames().constructor, d()->referenceErrorConstructor, DontEnum);
 295     syntaxErrorPrototype->putDirect(exec->propertyNames().constructor, d()->syntaxErrorConstructor, DontEnum);
 296     typeErrorPrototype->putDirect(exec->propertyNames().constructor, d()->typeErrorConstructor, DontEnum);
 297     URIErrorPrototype->putDirect(exec->propertyNames().constructor, d()->URIErrorConstructor, DontEnum);
 298
 299     // Set global constructors
 300
 301     // FIXME: These properties could be handled by a static hash table.
 302
 303     putDirectFunctionWithoutTransition(Identifier(exec, "Object"), objectConstructor, DontEnum);
 304     putDirectFunctionWithoutTransition(Identifier(exec, "Function"), functionConstructor, DontEnum);
 305     putDirectFunctionWithoutTransition(Identifier(exec, "Array"), arrayConstructor, DontEnum);
 306     putDirectFunctionWithoutTransition(Identifier(exec, "Boolean"), booleanConstructor, DontEnum);
 307     putDirectFunctionWithoutTransition(Identifier(exec, "String"), stringConstructor, DontEnum);
 308     putDirectFunctionWithoutTransition(Identifier(exec, "Number"), numberConstructor, DontEnum);
 309     putDirectFunctionWithoutTransition(Identifier(exec, "Date"), dateConstructor, DontEnum);
 310     putDirectFunctionWithoutTransition(Identifier(exec, "RegExp"), d()->regExpConstructor, DontEnum);
 311     putDirectFunctionWithoutTransition(Identifier(exec, "Error"), d()->errorConstructor, DontEnum);
 312     putDirectFunctionWithoutTransition(Identifier(exec, "EvalError"), d()->evalErrorConstructor);
 313     putDirectFunctionWithoutTransition(Identifier(exec, "RangeError"), d()->rangeErrorConstructor);
 314     putDirectFunctionWithoutTransition(Identifier(exec, "ReferenceError"), d()->referenceErrorConstructor);
 315     putDirectFunctionWithoutTransition(Identifier(exec, "SyntaxError"), d()->syntaxErrorConstructor);
 316     putDirectFunctionWithoutTransition(Identifier(exec, "TypeError"), d()->typeErrorConstructor);
 317     putDirectFunctionWithoutTransition(Identifier(exec, "URIError"), d()->URIErrorConstructor);
 318
 319     // Set global values.
 320     GlobalPropertyInfo staticGlobals[] = {
 321         GlobalPropertyInfo(Identifier(exec, "Math"), new (exec) MathObject(exec, MathObject::createStructure(d()->objectPrototype)), DontEnum | DontDelete),
 322         GlobalPropertyInfo(Identifier(exec, "NaN"), jsNaN(exec), DontEnum | DontDelete),
 323         GlobalPropertyInfo(Identifier(exec, "Infinity"), jsNumber(exec, Inf), DontEnum | DontDelete),
 324         GlobalPropertyInfo(Identifier(exec, "undefined"), jsUndefined(), DontEnum | DontDelete),
 325         GlobalPropertyInfo(Identifier(exec, "JSON"), new (exec) JSONObject(JSONObject::createStructure(d()->objectPrototype)), DontEnum | DontDelete)
 326     };
 327
 328     addStaticGlobals(staticGlobals, sizeof(staticGlobals) / sizeof(GlobalPropertyInfo));
 329
 330     // Set global functions.
 331
 332     d()->evalFunction = new (exec) GlobalEvalFunction(exec, GlobalEvalFunction::createStructure(d()->functionPrototype), 1, exec->propertyNames().eval, globalFuncEval, this);
 333     putDirectFunctionWithoutTransition(exec, d()->evalFunction, DontEnum);
 334     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 2, Identifier(exec, "parseInt"), globalFuncParseInt), DontEnum);
 335     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "parseFloat"), globalFuncParseFloat), DontEnum);
 336     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isNaN"), globalFuncIsNaN), DontEnum);
 337     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "isFinite"), globalFuncIsFinite), DontEnum);
 338     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "escape"), globalFuncEscape), DontEnum);
 339     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "unescape"), globalFuncUnescape), DontEnum);
 340     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURI"), globalFuncDecodeURI), DontEnum);
 341     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "decodeURIComponent"), globalFuncDecodeURIComponent), DontEnum);
 342     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURI"), globalFuncEncodeURI), DontEnum);
 343     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "encodeURIComponent"), globalFuncEncodeURIComponent), DontEnum);
 344 #ifndef NDEBUG
 345     putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, d()->prototypeFunctionStructure.get(), 1, Identifier(exec, "jscprint"), globalFuncJSCPrint), DontEnum);
 346 #endif
 347
 348     resetPrototype(prototype);
 349 }
 350
 351 // Set prototype, and also insert the object prototype at the end of the chain.
 352 void JSGlobalObject::resetPrototype(JSValue prototype)
 353 {
 354     setPrototype(prototype);
 355
 356     JSObject* oldLastInPrototypeChain = lastInPrototypeChain(this);
 357     JSObject* objectPrototype = d()->objectPrototype;
 358     if (oldLastInPrototypeChain != objectPrototype)
 359         oldLastInPrototypeChain->setPrototype(objectPrototype);
 360 }
 361
 362 void JSGlobalObject::markChildren(MarkStack& markStack)
 363 {
 364     JSVariableObject::markChildren(markStack);
 365
 366     HashSet<GlobalCodeBlock*>::const_iterator end = codeBlocks().end();
 367     for (HashSet<GlobalCodeBlock*>::const_iterator it = codeBlocks().begin(); it != end; ++it)
 368         (*it)->markAggregate(markStack);
 369
 370     RegisterFile& registerFile = globalData()->interpreter->registerFile();
 371     if (registerFile.globalObject() == this)
 372         registerFile.markGlobals(markStack, &globalData()->heap);
 373
 374     markIfNeeded(markStack, d()->regExpConstructor);
 375     markIfNeeded(markStack, d()->errorConstructor);
 376     markIfNeeded(markStack, d()->evalErrorConstructor);
 377     markIfNeeded(markStack, d()->rangeErrorConstructor);
 378     markIfNeeded(markStack, d()->referenceErrorConstructor);
 379     markIfNeeded(markStack, d()->syntaxErrorConstructor);
 380     markIfNeeded(markStack, d()->typeErrorConstructor);
 381     markIfNeeded(markStack, d()->URIErrorConstructor);
 382
 383     markIfNeeded(markStack, d()->evalFunction);
 384     markIfNeeded(markStack, d()->callFunction);
 385     markIfNeeded(markStack, d()->applyFunction);
 386
 387     markIfNeeded(markStack, d()->objectPrototype);
 388     markIfNeeded(markStack, d()->functionPrototype);
 389     markIfNeeded(markStack, d()->arrayPrototype);
 390     markIfNeeded(markStack, d()->booleanPrototype);
 391     markIfNeeded(markStack, d()->stringPrototype);
 392     markIfNeeded(markStack, d()->numberPrototype);
 393     markIfNeeded(markStack, d()->datePrototype);
 394     markIfNeeded(markStack, d()->regExpPrototype);
 395
 396     markIfNeeded(markStack, d()->methodCallDummy);
 397
 398     markIfNeeded(markStack, d()->errorStructure);
 399     markIfNeeded(markStack, d()->argumentsStructure);
 400     markIfNeeded(markStack, d()->arrayStructure);
 401     markIfNeeded(markStack, d()->booleanObjectStructure);
 402     markIfNeeded(markStack, d()->callbackConstructorStructure);
 403     markIfNeeded(markStack, d()->callbackFunctionStructure);
 404     markIfNeeded(markStack, d()->callbackObjectStructure);
 405     markIfNeeded(markStack, d()->dateStructure);
 406     markIfNeeded(markStack, d()->emptyObjectStructure);
 407     markIfNeeded(markStack, d()->errorStructure);
 408     markIfNeeded(markStack, d()->functionStructure);
 409     markIfNeeded(markStack, d()->numberObjectStructure);
 410     markIfNeeded(markStack, d()->prototypeFunctionStructure);
 411     markIfNeeded(markStack, d()->regExpMatchesArrayStructure);
 412     markIfNeeded(markStack, d()->regExpStructure);
 413     markIfNeeded(markStack, d()->stringObjectStructure);
 414
 415     // No need to mark the other structures, because their prototypes are all
 416     // guaranteed to be referenced elsewhere.
 417
 418     Register* registerArray = d()->registerArray.get();
 419     if (!registerArray)
 420         return;
 421
 422     size_t size = d()->registerArraySize;
 423     markStack.appendValues(reinterpret_cast<JSValue*>(registerArray), size);
 424 }
 425
 426 ExecState* JSGlobalObject::globalExec()
 427 {
 428     return CallFrame::create(d()->globalCallFrame + RegisterFile::CallFrameHeaderSize);
 429 }
 430
 431 bool JSGlobalObject::isDynamicScope() const
 432 {
 433     return true;
 434 }
 435
 436 void JSGlobalObject::copyGlobalsFrom(RegisterFile& registerFile)
 437 {
 438     ASSERT(!d()->registerArray);
 439     ASSERT(!d()->registerArraySize);
 440
 441     int numGlobals = registerFile.numGlobals();
 442     if (!numGlobals) {
 443         d()->registers = 0;
 444         return;
 445     }
 446
 447     Register* registerArray = copyRegisterArray(registerFile.lastGlobal(), numGlobals);
 448     setRegisters(registerArray + numGlobals, registerArray, numGlobals);
 449 }
 450
 451 void JSGlobalObject::copyGlobalsTo(RegisterFile& registerFile)
 452 {
 453     JSGlobalObject* lastGlobalObject = registerFile.globalObject();
 454     if (lastGlobalObject && lastGlobalObject != this)
 455         lastGlobalObject->copyGlobalsFrom(registerFile);
 456
 457     registerFile.setGlobalObject(this);
 458     registerFile.setNumGlobals(symbolTable().size());
 459
 460     if (d()->registerArray) {
 461         memcpy(registerFile.start() - d()->registerArraySize, d()->registerArray.get(), d()->registerArraySize * sizeof(Register));
 462         setRegisters(registerFile.start(), 0, 0);
 463     }
 464 }
 465
 466 void* JSGlobalObject::operator new(size_t size, JSGlobalData* globalData)
 467 {
 468     return globalData->heap.allocate(size);
 469 }
 470
 471 void JSGlobalObject::destroyJSGlobalObjectData(void* jsGlobalObjectData)
 472 {
 473     delete static_cast<JSGlobalObjectData*>(jsGlobalObjectData);
 474 }
 475
 476 } // namespace JSC