runtime/JSGlobalObject.cpp

   1 /*
   2  * Copyright (C) 2007, 2008, 2009, 2014 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 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 "Arguments.h"
  34 #include "ArgumentsIteratorConstructor.h"
  35 #include "ArgumentsIteratorPrototype.h"
  36 #include "ArrayConstructor.h"
  37 #include "ArrayIteratorConstructor.h"
  38 #include "ArrayIteratorPrototype.h"
  39 #include "ArrayPrototype.h"
  40 #include "BooleanConstructor.h"
  41 #include "BooleanPrototype.h"
  42 #include "CodeBlock.h"
  43 #include "CodeCache.h"
  44 #include "ConsolePrototype.h"
  45 #include "DateConstructor.h"
  46 #include "DatePrototype.h"
  47 #include "Debugger.h"
  48 #include "Error.h"
  49 #include "ErrorConstructor.h"
  50 #include "ErrorPrototype.h"
  51 #include "FunctionConstructor.h"
  52 #include "FunctionPrototype.h"
  53 #include "GetterSetter.h"
  54 #include "HeapIterationScope.h"
  55 #include "Interpreter.h"
  56 #include "JSAPIWrapperObject.h"
  57 #include "JSActivation.h"
  58 #include "JSArgumentsIterator.h"
  59 #include "JSArrayBuffer.h"
  60 #include "JSArrayBufferConstructor.h"
  61 #include "JSArrayBufferPrototype.h"
  62 #include "JSArrayIterator.h"
  63 #include "JSBoundFunction.h"
  64 #include "JSCInlines.h"
  65 #include "JSCallbackConstructor.h"
  66 #include "JSCallbackFunction.h"
  67 #include "JSCallbackObject.h"
  68 #include "JSConsole.h"
  69 #include "JSDataView.h"
  70 #include "JSDataViewPrototype.h"
  71 #include "JSFunction.h"
  72 #include "JSGenericTypedArrayViewConstructorInlines.h"
  73 #include "JSGenericTypedArrayViewInlines.h"
  74 #include "JSGenericTypedArrayViewPrototypeInlines.h"
  75 #include "JSGlobalObjectFunctions.h"
  76 #include "JSLock.h"
  77 #include "JSMap.h"
  78 #include "JSMapIterator.h"
  79 #include "JSNameScope.h"
  80 #include "JSONObject.h"
  81 #include "JSSet.h"
  82 #include "JSSetIterator.h"
  83 #include "JSTypedArrayConstructors.h"
  84 #include "JSTypedArrayPrototypes.h"
  85 #include "JSTypedArrays.h"
  86 #include "JSWeakMap.h"
  87 #include "JSWithScope.h"
  88 #include "LegacyProfiler.h"
  89 #include "Lookup.h"
  90 #include "MapConstructor.h"
  91 #include "MapIteratorConstructor.h"
  92 #include "MapIteratorPrototype.h"
  93 #include "MapPrototype.h"
  94 #include "MathObject.h"
  95 #include "Microtask.h"
  96 #include "NameConstructor.h"
  97 #include "NameInstance.h"
  98 #include "NamePrototype.h"
  99 #include "NativeErrorConstructor.h"
 100 #include "NativeErrorPrototype.h"
 101 #include "NumberConstructor.h"
 102 #include "NumberPrototype.h"
 103 #include "ObjCCallbackFunction.h"
 104 #include "ObjectConstructor.h"
 105 #include "ObjectPrototype.h"
 106 #include "ParserError.h"
 107 #include "RegExpConstructor.h"
 108 #include "RegExpMatchesArray.h"
 109 #include "RegExpObject.h"
 110 #include "RegExpPrototype.h"
 111 #include "SetConstructor.h"
 112 #include "SetIteratorConstructor.h"
 113 #include "SetIteratorPrototype.h"
 114 #include "SetPrototype.h"
 115 #include "StrictEvalActivation.h"
 116 #include "StringConstructor.h"
 117 #include "StringPrototype.h"
 118 #include "VariableWatchpointSetInlines.h"
 119 #include "WeakMapConstructor.h"
 120 #include "WeakMapPrototype.h"
 121
 122 #if ENABLE(PROMISES)
 123 #include "JSPromise.h"
 124 #include "JSPromiseConstructor.h"
 125 #include "JSPromisePrototype.h"
 126 #endif // ENABLE(PROMISES)
 127
 128 #if ENABLE(REMOTE_INSPECTOR)
 129 #include "JSGlobalObjectDebuggable.h"
 130 #include "JSGlobalObjectInspectorController.h"
 131 #endif
 132
 133 #if ENABLE(WEB_REPLAY)
 134 #include "EmptyInputCursor.h"
 135 #include "JSReplayInputs.h"
 136 #endif
 137
 138 #include "JSGlobalObject.lut.h"
 139
 140 namespace JSC {
 141
 142 const ClassInfo JSGlobalObject::s_info = { "GlobalObject", &Base::s_info, 0, ExecState::globalObjectTable, CREATE_METHOD_TABLE(JSGlobalObject) };
 143
 144 const GlobalObjectMethodTable JSGlobalObject::s_globalObjectMethodTable = { &allowsAccessFrom, &supportsProfiling, &supportsRichSourceInfo, &shouldInterruptScript, &javaScriptExperimentsEnabled, 0, &shouldInterruptScriptBeforeTimeout };
 145
 146 /* Source for JSGlobalObject.lut.h
 147 @begin globalObjectTable
 148   parseInt              globalFuncParseInt              DontEnum|Function 2
 149   parseFloat            globalFuncParseFloat            DontEnum|Function 1
 150   isNaN                 globalFuncIsNaN                 DontEnum|Function 1
 151   isFinite              globalFuncIsFinite              DontEnum|Function 1
 152   escape                globalFuncEscape                DontEnum|Function 1
 153   unescape              globalFuncUnescape              DontEnum|Function 1
 154   decodeURI             globalFuncDecodeURI             DontEnum|Function 1
 155   decodeURIComponent    globalFuncDecodeURIComponent    DontEnum|Function 1
 156   encodeURI             globalFuncEncodeURI             DontEnum|Function 1
 157   encodeURIComponent    globalFuncEncodeURIComponent    DontEnum|Function 1
 158 @end
 159 */
 160
 161 JSGlobalObject::JSGlobalObject(VM& vm, Structure* structure, const GlobalObjectMethodTable* globalObjectMethodTable)
 162     : Base(vm, structure, 0)
 163     , m_vm(vm)
 164 #if ENABLE(WEB_REPLAY)
 165     , m_inputCursor(EmptyInputCursor::create())
 166 #endif
 167     , m_masqueradesAsUndefinedWatchpoint(adoptRef(new WatchpointSet(IsWatched)))
 168     , m_havingABadTimeWatchpoint(adoptRef(new WatchpointSet(IsWatched)))
 169     , m_varInjectionWatchpoint(adoptRef(new WatchpointSet(IsWatched)))
 170     , m_weakRandom(Options::forceWeakRandomSeed() ? Options::forcedWeakRandomSeed() : static_cast<unsigned>(randomNumber() * (std::numeric_limits<unsigned>::max() + 1.0)))
 171     , m_evalEnabled(true)
 172     , m_experimentsEnabled(false)
 173     , m_consoleClient(nullptr)
 174     , m_globalObjectMethodTable(globalObjectMethodTable ? globalObjectMethodTable : &s_globalObjectMethodTable)
 175 {
 176 }
 177
 178 JSGlobalObject::~JSGlobalObject()
 179 {
 180 #if ENABLE(REMOTE_INSPECTOR)
 181     m_inspectorController->globalObjectDestroyed();
 182 #endif
 183
 184     if (m_debugger)
 185         m_debugger->detach(this, Debugger::GlobalObjectIsDestructing);
 186
 187     if (LegacyProfiler* profiler = vm().enabledProfiler())
 188         profiler->stopProfiling(this);
 189 }
 190
 191 void JSGlobalObject::destroy(JSCell* cell)
 192 {
 193     static_cast<JSGlobalObject*>(cell)->JSGlobalObject::~JSGlobalObject();
 194 }
 195
 196 void JSGlobalObject::setGlobalThis(VM& vm, JSObject* globalThis)
 197 {
 198     m_globalThis.set(vm, this, globalThis);
 199 }
 200
 201 void JSGlobalObject::init()
 202 {
 203     ASSERT(vm().currentThreadIsHoldingAPILock());
 204
 205     JSGlobalObject::globalExec()->init(0, 0, this, CallFrame::noCaller(), 0, 0);
 206
 207     m_debugger = 0;
 208
 209 #if ENABLE(REMOTE_INSPECTOR)
 210     m_inspectorController = std::make_unique<Inspector::JSGlobalObjectInspectorController>(*this);
 211     m_inspectorDebuggable = std::make_unique<JSGlobalObjectDebuggable>(*this);
 212     m_inspectorDebuggable->init();
 213     m_inspectorDebuggable->setRemoteDebuggingAllowed(true);
 214     m_consoleClient = m_inspectorController->consoleClient();
 215 #endif
 216
 217     reset(prototype());
 218 }
 219
 220 void JSGlobalObject::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
 221 {
 222     JSGlobalObject* thisObject = jsCast<JSGlobalObject*>(cell);
 223     ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(thisObject));
 224
 225     if (symbolTablePut(thisObject, exec, propertyName, value, slot.isStrictMode()))
 226         return;
 227     Base::put(thisObject, exec, propertyName, value, slot);
 228 }
 229
 230 bool JSGlobalObject::defineOwnProperty(JSObject* object, ExecState* exec, PropertyName propertyName, const PropertyDescriptor& descriptor, bool shouldThrow)
 231 {
 232     JSGlobalObject* thisObject = jsCast<JSGlobalObject*>(object);
 233     PropertySlot slot(thisObject);
 234     // silently ignore attempts to add accessors aliasing vars.
 235     if (descriptor.isAccessorDescriptor() && symbolTableGet(thisObject, propertyName, slot))
 236         return false;
 237     return Base::defineOwnProperty(thisObject, exec, propertyName, descriptor, shouldThrow);
 238 }
 239
 240 JSGlobalObject::NewGlobalVar JSGlobalObject::addGlobalVar(const Identifier& ident, ConstantMode constantMode)
 241 {
 242     ConcurrentJITLocker locker(symbolTable()->m_lock);
 243     int index = symbolTable()->size(locker);
 244     SymbolTableEntry newEntry(index, (constantMode == IsConstant) ? ReadOnly : 0);
 245     if (constantMode == IsVariable)
 246         newEntry.prepareToWatch(symbolTable());
 247     SymbolTable::Map::AddResult result = symbolTable()->add(locker, ident.impl(), newEntry);
 248     if (result.isNewEntry)
 249         addRegisters(1);
 250     else
 251         index = result.iterator->value.getIndex();
 252     NewGlobalVar var;
 253     var.registerNumber = index;
 254     var.set = result.iterator->value.watchpointSet();
 255     return var;
 256 }
 257
 258 void JSGlobalObject::addFunction(ExecState* exec, const Identifier& propertyName, JSValue value)
 259 {
 260     VM& vm = exec->vm();
 261     removeDirect(vm, propertyName); // Newly declared functions overwrite existing properties.
 262     NewGlobalVar var = addGlobalVar(propertyName, IsVariable);
 263     registerAt(var.registerNumber).set(exec->vm(), this, value);
 264     if (var.set)
 265         var.set->notifyWrite(vm, value);
 266 }
 267
 268 static inline JSObject* lastInPrototypeChain(JSObject* object)
 269 {
 270     JSObject* o = object;
 271     while (o->prototype().isObject())
 272         o = asObject(o->prototype());
 273     return o;
 274 }
 275
 276 void JSGlobalObject::reset(JSValue prototype)
 277 {
 278     ExecState* exec = JSGlobalObject::globalExec();
 279     VM& vm = exec->vm();
 280
 281     m_functionPrototype.set(vm, this, FunctionPrototype::create(vm, FunctionPrototype::createStructure(vm, this, jsNull()))); // The real prototype will be set once ObjectPrototype is created.
 282     m_functionStructure.set(vm, this, JSFunction::createStructure(vm, this, m_functionPrototype.get()));
 283     m_boundFunctionStructure.set(vm, this, JSBoundFunction::createStructure(vm, this, m_functionPrototype.get()));
 284     m_namedFunctionStructure.set(vm, this, Structure::addPropertyTransition(vm, m_functionStructure.get(), vm.propertyNames->name, DontDelete | ReadOnly | DontEnum, 0, m_functionNameOffset));
 285     m_internalFunctionStructure.set(vm, this, InternalFunction::createStructure(vm, this, m_functionPrototype.get()));
 286     JSFunction* callFunction = 0;
 287     JSFunction* applyFunction = 0;
 288     m_functionPrototype->addFunctionProperties(exec, this, &callFunction, &applyFunction);
 289     m_callFunction.set(vm, this, callFunction);
 290     m_applyFunction.set(vm, this, applyFunction);
 291     m_objectPrototype.set(vm, this, ObjectPrototype::create(vm, this, ObjectPrototype::createStructure(vm, this, jsNull())));
 292     GetterSetter* protoAccessor = GetterSetter::create(vm);
 293     protoAccessor->setGetter(vm, JSFunction::create(vm, this, 0, String(), globalFuncProtoGetter));
 294     protoAccessor->setSetter(vm, JSFunction::create(vm, this, 0, String(), globalFuncProtoSetter));
 295     m_objectPrototype->putDirectNonIndexAccessor(vm, vm.propertyNames->underscoreProto, protoAccessor, Accessor | DontEnum);
 296     m_functionPrototype->structure()->setPrototypeWithoutTransition(vm, m_objectPrototype.get());
 297
 298     m_typedArrays[toIndex(TypeInt8)].prototype.set(vm, this, JSInt8ArrayPrototype::create(vm, this, JSInt8ArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 299     m_typedArrays[toIndex(TypeInt16)].prototype.set(vm, this, JSInt16ArrayPrototype::create(vm, this, JSInt16ArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 300     m_typedArrays[toIndex(TypeInt32)].prototype.set(vm, this, JSInt32ArrayPrototype::create(vm, this, JSInt32ArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 301     m_typedArrays[toIndex(TypeUint8)].prototype.set(vm, this, JSUint8ArrayPrototype::create(vm, this, JSUint8ArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 302     m_typedArrays[toIndex(TypeUint8Clamped)].prototype.set(vm, this, JSUint8ClampedArrayPrototype::create(vm, this, JSUint8ClampedArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 303     m_typedArrays[toIndex(TypeUint16)].prototype.set(vm, this, JSUint16ArrayPrototype::create(vm, this, JSUint16ArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 304     m_typedArrays[toIndex(TypeUint32)].prototype.set(vm, this, JSUint32ArrayPrototype::create(vm, this, JSUint32ArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 305     m_typedArrays[toIndex(TypeFloat32)].prototype.set(vm, this, JSFloat32ArrayPrototype::create(vm, this, JSFloat32ArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 306     m_typedArrays[toIndex(TypeFloat64)].prototype.set(vm, this, JSFloat64ArrayPrototype::create(vm, this, JSFloat64ArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 307     m_typedArrays[toIndex(TypeDataView)].prototype.set(vm, this, JSDataViewPrototype::create(vm, JSDataViewPrototype::createStructure(vm, this, m_objectPrototype.get())));
 308
 309     m_typedArrays[toIndex(TypeInt8)].structure.set(vm, this, JSInt8Array::createStructure(vm, this, m_typedArrays[toIndex(TypeInt8)].prototype.get()));
 310     m_typedArrays[toIndex(TypeInt16)].structure.set(vm, this, JSInt16Array::createStructure(vm, this, m_typedArrays[toIndex(TypeInt16)].prototype.get()));
 311     m_typedArrays[toIndex(TypeInt32)].structure.set(vm, this, JSInt32Array::createStructure(vm, this, m_typedArrays[toIndex(TypeInt32)].prototype.get()));
 312     m_typedArrays[toIndex(TypeUint8)].structure.set(vm, this, JSUint8Array::createStructure(vm, this, m_typedArrays[toIndex(TypeUint8)].prototype.get()));
 313     m_typedArrays[toIndex(TypeUint8Clamped)].structure.set(vm, this, JSUint8ClampedArray::createStructure(vm, this, m_typedArrays[toIndex(TypeUint8Clamped)].prototype.get()));
 314     m_typedArrays[toIndex(TypeUint16)].structure.set(vm, this, JSUint16Array::createStructure(vm, this, m_typedArrays[toIndex(TypeUint16)].prototype.get()));
 315     m_typedArrays[toIndex(TypeUint32)].structure.set(vm, this, JSUint32Array::createStructure(vm, this, m_typedArrays[toIndex(TypeUint32)].prototype.get()));
 316     m_typedArrays[toIndex(TypeFloat32)].structure.set(vm, this, JSFloat32Array::createStructure(vm, this, m_typedArrays[toIndex(TypeFloat32)].prototype.get()));
 317     m_typedArrays[toIndex(TypeFloat64)].structure.set(vm, this, JSFloat64Array::createStructure(vm, this, m_typedArrays[toIndex(TypeFloat64)].prototype.get()));
 318     m_typedArrays[toIndex(TypeDataView)].structure.set(vm, this, JSDataView::createStructure(vm, this, m_typedArrays[toIndex(TypeDataView)].prototype.get()));
 319
 320     m_nameScopeStructure.set(vm, this, JSNameScope::createStructure(vm, this, jsNull()));
 321     m_activationStructure.set(vm, this, JSActivation::createStructure(vm, this, jsNull()));
 322     m_strictEvalActivationStructure.set(vm, this, StrictEvalActivation::createStructure(vm, this, jsNull()));
 323     m_withScopeStructure.set(vm, this, JSWithScope::createStructure(vm, this, jsNull()));
 324
 325     m_nullPrototypeObjectStructure.set(vm, this, JSFinalObject::createStructure(vm, this, jsNull(), JSFinalObject::defaultInlineCapacity()));
 326
 327     m_callbackFunctionStructure.set(vm, this, JSCallbackFunction::createStructure(vm, this, m_functionPrototype.get()));
 328     m_argumentsStructure.set(vm, this, Arguments::createStructure(vm, this, m_objectPrototype.get()));
 329     m_callbackConstructorStructure.set(vm, this, JSCallbackConstructor::createStructure(vm, this, m_objectPrototype.get()));
 330     m_callbackObjectStructure.set(vm, this, JSCallbackObject<JSDestructibleObject>::createStructure(vm, this, m_objectPrototype.get()));
 331 #if JSC_OBJC_API_ENABLED
 332     m_objcCallbackFunctionStructure.set(vm, this, ObjCCallbackFunction::createStructure(vm, this, m_functionPrototype.get()));
 333     m_objcWrapperObjectStructure.set(vm, this, JSCallbackObject<JSAPIWrapperObject>::createStructure(vm, this, m_objectPrototype.get()));
 334 #endif
 335
 336     m_arrayPrototype.set(vm, this, ArrayPrototype::create(vm, this, ArrayPrototype::createStructure(vm, this, m_objectPrototype.get())));
 337
 338     m_originalArrayStructureForIndexingShape[UndecidedShape >> IndexingShapeShift].set(vm, this, JSArray::createStructure(vm, this, m_arrayPrototype.get(), ArrayWithUndecided));
 339     m_originalArrayStructureForIndexingShape[Int32Shape >> IndexingShapeShift].set(vm, this, JSArray::createStructure(vm, this, m_arrayPrototype.get(), ArrayWithInt32));
 340     m_originalArrayStructureForIndexingShape[DoubleShape >> IndexingShapeShift].set(vm, this, JSArray::createStructure(vm, this, m_arrayPrototype.get(), ArrayWithDouble));
 341     m_originalArrayStructureForIndexingShape[ContiguousShape >> IndexingShapeShift].set(vm, this, JSArray::createStructure(vm, this, m_arrayPrototype.get(), ArrayWithContiguous));
 342     m_originalArrayStructureForIndexingShape[ArrayStorageShape >> IndexingShapeShift].set(vm, this, JSArray::createStructure(vm, this, m_arrayPrototype.get(), ArrayWithArrayStorage));
 343     m_originalArrayStructureForIndexingShape[SlowPutArrayStorageShape >> IndexingShapeShift].set(vm, this, JSArray::createStructure(vm, this, m_arrayPrototype.get(), ArrayWithSlowPutArrayStorage));
 344     for (unsigned i = 0; i < NumberOfIndexingShapes; ++i)
 345         m_arrayStructureForIndexingShapeDuringAllocation[i] = m_originalArrayStructureForIndexingShape[i];
 346
 347     m_regExpMatchesArrayStructure.set(vm, this, RegExpMatchesArray::createStructure(vm, this, m_arrayPrototype.get()));
 348
 349     RegExp* emptyRegex = RegExp::create(vm, "", NoFlags);
 350
 351     m_regExpPrototype.set(vm, this, RegExpPrototype::create(vm, RegExpPrototype::createStructure(vm, this, m_objectPrototype.get()), emptyRegex));
 352     m_regExpStructure.set(vm, this, RegExpObject::createStructure(vm, this, m_regExpPrototype.get()));
 353
 354 #if ENABLE(PROMISES)
 355     m_promisePrototype.set(vm, this, JSPromisePrototype::create(exec, this, JSPromisePrototype::createStructure(vm, this, m_objectPrototype.get())));
 356     m_promiseStructure.set(vm, this, JSPromise::createStructure(vm, this, m_promisePrototype.get()));
 357 #endif // ENABLE(PROMISES)
 358
 359 #define CREATE_PROTOTYPE_FOR_SIMPLE_TYPE(capitalName, lowerName, properName, instanceType, jsName) \
 360     m_ ## lowerName ## Prototype.set(vm, this, capitalName##Prototype::create(vm, this, capitalName##Prototype::createStructure(vm, this, m_objectPrototype.get()))); \
 361     m_ ## properName ## Structure.set(vm, this, instanceType::createStructure(vm, this, m_ ## lowerName ## Prototype.get()));
 362
 363     FOR_EACH_SIMPLE_BUILTIN_TYPE(CREATE_PROTOTYPE_FOR_SIMPLE_TYPE)
 364
 365 #undef CREATE_PROTOTYPE_FOR_SIMPLE_TYPE
 366
 367     // Constructors
 368
 369     ObjectConstructor* objectConstructor = ObjectConstructor::create(vm, ObjectConstructor::createStructure(vm, this, m_functionPrototype.get()), m_objectPrototype.get());
 370     m_objectConstructor.set(vm, this, objectConstructor);
 371     JSCell* functionConstructor = FunctionConstructor::create(vm, FunctionConstructor::createStructure(vm, this, m_functionPrototype.get()), m_functionPrototype.get());
 372     JSCell* arrayConstructor = ArrayConstructor::create(vm, ArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_arrayPrototype.get());
 373
 374     m_regExpConstructor.set(vm, this, RegExpConstructor::create(vm, RegExpConstructor::createStructure(vm, this, m_functionPrototype.get()), m_regExpPrototype.get()));
 375
 376 #define CREATE_CONSTRUCTOR_FOR_SIMPLE_TYPE(capitalName, lowerName, properName, instanceType, jsName) \
 377     capitalName ## Constructor* lowerName ## Constructor = capitalName ## Constructor::create(vm, capitalName ## Constructor::createStructure(vm, this, m_functionPrototype.get()), m_ ## lowerName ## Prototype.get()); \
 378     m_ ## lowerName ## Prototype->putDirectWithoutTransition(vm, vm.propertyNames->constructor, lowerName ## Constructor, DontEnum); \
 379
 380     FOR_EACH_SIMPLE_BUILTIN_TYPE(CREATE_CONSTRUCTOR_FOR_SIMPLE_TYPE)
 381
 382 #undef CREATE_CONSTRUCTOR_FOR_SIMPLE_TYPE
 383
 384     m_errorConstructor.set(vm, this, errorConstructor);
 385
 386     Structure* nativeErrorPrototypeStructure = NativeErrorPrototype::createStructure(vm, this, m_errorPrototype.get());
 387     Structure* nativeErrorStructure = NativeErrorConstructor::createStructure(vm, this, m_functionPrototype.get());
 388     m_evalErrorConstructor.set(vm, this, NativeErrorConstructor::create(vm, this, nativeErrorStructure, nativeErrorPrototypeStructure, ASCIILiteral("EvalError")));
 389     m_rangeErrorConstructor.set(vm, this, NativeErrorConstructor::create(vm, this, nativeErrorStructure, nativeErrorPrototypeStructure, ASCIILiteral("RangeError")));
 390     m_referenceErrorConstructor.set(vm, this, NativeErrorConstructor::create(vm, this, nativeErrorStructure, nativeErrorPrototypeStructure, ASCIILiteral("ReferenceError")));
 391     m_syntaxErrorConstructor.set(vm, this, NativeErrorConstructor::create(vm, this, nativeErrorStructure, nativeErrorPrototypeStructure, ASCIILiteral("SyntaxError")));
 392     m_typeErrorConstructor.set(vm, this, NativeErrorConstructor::create(vm, this, nativeErrorStructure, nativeErrorPrototypeStructure, ASCIILiteral("TypeError")));
 393     m_URIErrorConstructor.set(vm, this, NativeErrorConstructor::create(vm, this, nativeErrorStructure, nativeErrorPrototypeStructure, ASCIILiteral("URIError")));
 394 #if ENABLE(PROMISES)
 395     m_promiseConstructor.set(vm, this, JSPromiseConstructor::create(vm, JSPromiseConstructor::createStructure(vm, this, m_functionPrototype.get()), m_promisePrototype.get()));
 396 #endif
 397
 398     m_objectPrototype->putDirectWithoutTransition(vm, vm.propertyNames->constructor, objectConstructor, DontEnum);
 399     m_functionPrototype->putDirectWithoutTransition(vm, vm.propertyNames->constructor, functionConstructor, DontEnum);
 400     m_arrayPrototype->putDirectWithoutTransition(vm, vm.propertyNames->constructor, arrayConstructor, DontEnum);
 401     m_regExpPrototype->putDirectWithoutTransition(vm, vm.propertyNames->constructor, m_regExpConstructor.get(), DontEnum);
 402 #if ENABLE(PROMISES)
 403     m_promisePrototype->putDirectWithoutTransition(vm, vm.propertyNames->constructor, m_promiseConstructor.get(), DontEnum);
 404 #endif
 405
 406     putDirectWithoutTransition(vm, vm.propertyNames->Object, objectConstructor, DontEnum);
 407     putDirectWithoutTransition(vm, vm.propertyNames->Function, functionConstructor, DontEnum);
 408     putDirectWithoutTransition(vm, vm.propertyNames->Array, arrayConstructor, DontEnum);
 409     putDirectWithoutTransition(vm, vm.propertyNames->RegExp, m_regExpConstructor.get(), DontEnum);
 410     putDirectWithoutTransition(vm, vm.propertyNames->EvalError, m_evalErrorConstructor.get(), DontEnum);
 411     putDirectWithoutTransition(vm, vm.propertyNames->RangeError, m_rangeErrorConstructor.get(), DontEnum);
 412     putDirectWithoutTransition(vm, vm.propertyNames->ReferenceError, m_referenceErrorConstructor.get(), DontEnum);
 413     putDirectWithoutTransition(vm, vm.propertyNames->SyntaxError, m_syntaxErrorConstructor.get(), DontEnum);
 414     putDirectWithoutTransition(vm, vm.propertyNames->TypeError, m_typeErrorConstructor.get(), DontEnum);
 415     putDirectWithoutTransition(vm, vm.propertyNames->URIError, m_URIErrorConstructor.get(), DontEnum);
 416 #if ENABLE(PROMISES)
 417     putDirectWithoutTransition(vm, vm.propertyNames->Promise, m_promiseConstructor.get(), DontEnum);
 418 #endif
 419
 420
 421 #define PUT_CONSTRUCTOR_FOR_SIMPLE_TYPE(capitalName, lowerName, properName, instanceType, jsName) \
 422     putDirectWithoutTransition(vm, vm.propertyNames-> jsName, lowerName ## Constructor, DontEnum); \
 423
 424     FOR_EACH_SIMPLE_BUILTIN_TYPE_WITH_CONSTRUCTOR(PUT_CONSTRUCTOR_FOR_SIMPLE_TYPE)
 425
 426 #undef PUT_CONSTRUCTOR_FOR_SIMPLE_TYPE
 427     PrototypeMap& prototypeMap = vm.prototypeMap;
 428     Structure* iteratorResultStructure = prototypeMap.emptyObjectStructureForPrototype(m_objectPrototype.get(), JSFinalObject::defaultInlineCapacity());
 429     PropertyOffset offset;
 430     iteratorResultStructure = Structure::addPropertyTransition(vm, iteratorResultStructure, vm.propertyNames->done, 0, 0, offset);
 431     iteratorResultStructure = Structure::addPropertyTransition(vm, iteratorResultStructure, vm.propertyNames->value, 0, 0, offset);
 432     m_iteratorResultStructure.set(vm, this, iteratorResultStructure);
 433
 434     m_evalFunction.set(vm, this, JSFunction::create(vm, this, 1, vm.propertyNames->eval.string(), globalFuncEval));
 435     putDirectWithoutTransition(vm, vm.propertyNames->eval, m_evalFunction.get(), DontEnum);
 436
 437     putDirectWithoutTransition(vm, vm.propertyNames->JSON, JSONObject::create(vm, JSONObject::createStructure(vm, this, m_objectPrototype.get())), DontEnum);
 438     putDirectWithoutTransition(vm, vm.propertyNames->Math, MathObject::create(vm, this, MathObject::createStructure(vm, this, m_objectPrototype.get())), DontEnum);
 439
 440     std::array<InternalFunction*, NUMBER_OF_TYPED_ARRAY_TYPES> typedArrayConstructors;
 441     typedArrayConstructors[toIndex(TypeInt8)] = JSInt8ArrayConstructor::create(vm, JSInt8ArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeInt8)].prototype.get(), "Int8Array");
 442     typedArrayConstructors[toIndex(TypeInt16)] = JSInt16ArrayConstructor::create(vm, JSInt16ArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeInt16)].prototype.get(), "Int16Array");
 443     typedArrayConstructors[toIndex(TypeInt32)] = JSInt32ArrayConstructor::create(vm, JSInt32ArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeInt32)].prototype.get(), "Int32Array");
 444     typedArrayConstructors[toIndex(TypeUint8)] = JSUint8ArrayConstructor::create(vm, JSUint8ArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeUint8)].prototype.get(), "Uint8Array");
 445     typedArrayConstructors[toIndex(TypeUint8Clamped)] = JSUint8ClampedArrayConstructor::create(vm, JSUint8ClampedArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeUint8Clamped)].prototype.get(), "Uint8ClampedArray");
 446     typedArrayConstructors[toIndex(TypeUint16)] = JSUint16ArrayConstructor::create(vm, JSUint16ArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeUint16)].prototype.get(), "Uint16Array");
 447     typedArrayConstructors[toIndex(TypeUint32)] = JSUint32ArrayConstructor::create(vm, JSUint32ArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeUint32)].prototype.get(), "Uint32Array");
 448     typedArrayConstructors[toIndex(TypeFloat32)] = JSFloat32ArrayConstructor::create(vm, JSFloat32ArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeFloat32)].prototype.get(), "Float32Array");
 449     typedArrayConstructors[toIndex(TypeFloat64)] = JSFloat64ArrayConstructor::create(vm, JSFloat64ArrayConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeFloat64)].prototype.get(), "Float64Array");
 450     typedArrayConstructors[toIndex(TypeDataView)] = JSDataViewConstructor::create(vm, JSDataViewConstructor::createStructure(vm, this, m_functionPrototype.get()), m_typedArrays[toIndex(TypeDataView)].prototype.get(), "DataView");
 451
 452     for (unsigned typedArrayIndex = NUMBER_OF_TYPED_ARRAY_TYPES; typedArrayIndex--;) {
 453         m_typedArrays[typedArrayIndex].prototype->putDirectWithoutTransition(vm, vm.propertyNames->constructor, typedArrayConstructors[typedArrayIndex], DontEnum);
 454         putDirectWithoutTransition(vm, Identifier(exec, typedArrayConstructors[typedArrayIndex]->name(exec)), typedArrayConstructors[typedArrayIndex], DontEnum);
 455     }
 456
 457     JSFunction* builtinLog = JSFunction::create(vm, this, 1, vm.propertyNames->emptyIdentifier.string(), globalFuncBuiltinLog);
 458     GlobalPropertyInfo staticGlobals[] = {
 459         GlobalPropertyInfo(vm.propertyNames->NaN, jsNaN(), DontEnum | DontDelete | ReadOnly),
 460         GlobalPropertyInfo(vm.propertyNames->Infinity, jsNumber(std::numeric_limits<double>::infinity()), DontEnum | DontDelete | ReadOnly),
 461         GlobalPropertyInfo(vm.propertyNames->undefinedKeyword, jsUndefined(), DontEnum | DontDelete | ReadOnly),
 462         GlobalPropertyInfo(vm.propertyNames->undefinedPrivateName, jsUndefined(), DontEnum | DontDelete | ReadOnly),
 463         GlobalPropertyInfo(vm.propertyNames->ObjectPrivateName, objectConstructor, DontEnum | DontDelete | ReadOnly),
 464         GlobalPropertyInfo(vm.propertyNames->TypeErrorPrivateName, m_typeErrorConstructor.get(), DontEnum | DontDelete | ReadOnly),
 465         GlobalPropertyInfo(vm.propertyNames->BuiltinLogPrivateName, builtinLog, DontEnum | DontDelete | ReadOnly)
 466     };
 467     addStaticGlobals(staticGlobals, WTF_ARRAY_LENGTH(staticGlobals));
 468
 469     m_specialPointers[Special::CallFunction] = m_callFunction.get();
 470     m_specialPointers[Special::ApplyFunction] = m_applyFunction.get();
 471     m_specialPointers[Special::ObjectConstructor] = objectConstructor;
 472     m_specialPointers[Special::ArrayConstructor] = arrayConstructor;
 473
 474     ConsolePrototype* consolePrototype = ConsolePrototype::create(vm, this, ConsolePrototype::createStructure(vm, this, m_objectPrototype.get()));
 475     m_consoleStructure.set(vm, this, JSConsole::createStructure(vm, this, consolePrototype));
 476     JSConsole* consoleObject = JSConsole::create(vm, m_consoleStructure.get());
 477     putDirectWithoutTransition(vm, Identifier(exec, "console"), consoleObject, DontEnum);
 478
 479     if (m_experimentsEnabled) {
 480         NamePrototype* privateNamePrototype = NamePrototype::create(exec, NamePrototype::createStructure(vm, this, m_objectPrototype.get()));
 481         m_privateNameStructure.set(vm, this, NameInstance::createStructure(vm, this, privateNamePrototype));
 482
 483         JSCell* privateNameConstructor = NameConstructor::create(vm, NameConstructor::createStructure(vm, this, m_functionPrototype.get()), privateNamePrototype);
 484         privateNamePrototype->putDirectWithoutTransition(vm, vm.propertyNames->constructor, privateNameConstructor, DontEnum);
 485         putDirectWithoutTransition(vm, Identifier(exec, "Name"), privateNameConstructor, DontEnum);
 486     }
 487
 488     resetPrototype(vm, prototype);
 489 }
 490
 491 // Private namespace for helpers for JSGlobalObject::haveABadTime()
 492 namespace {
 493
 494 class ObjectsWithBrokenIndexingFinder : public MarkedBlock::VoidFunctor {
 495 public:
 496     ObjectsWithBrokenIndexingFinder(MarkedArgumentBuffer&, JSGlobalObject*);
 497     void operator()(JSCell*);
 498
 499 private:
 500     MarkedArgumentBuffer& m_foundObjects;
 501     JSGlobalObject* m_globalObject;
 502 };
 503
 504 ObjectsWithBrokenIndexingFinder::ObjectsWithBrokenIndexingFinder(
 505     MarkedArgumentBuffer& foundObjects, JSGlobalObject* globalObject)
 506     : m_foundObjects(foundObjects)
 507     , m_globalObject(globalObject)
 508 {
 509 }
 510
 511 inline bool hasBrokenIndexing(JSObject* object)
 512 {
 513     // This will change if we have more indexing types.
 514     IndexingType type = object->indexingType();
 515     // This could be made obviously more efficient, but isn't made so right now, because
 516     // we expect this to be an unlikely slow path anyway.
 517     return hasUndecided(type) || hasInt32(type) || hasDouble(type) || hasContiguous(type) || hasArrayStorage(type);
 518 }
 519
 520 void ObjectsWithBrokenIndexingFinder::operator()(JSCell* cell)
 521 {
 522     if (!cell->isObject())
 523         return;
 524
 525     JSObject* object = asObject(cell);
 526
 527     // Run this filter first, since it's cheap, and ought to filter out a lot of objects.
 528     if (!hasBrokenIndexing(object))
 529         return;
 530
 531     // We only want to have a bad time in the affected global object, not in the entire
 532     // VM. But we have to be careful, since there may be objects that claim to belong to
 533     // a different global object that have prototypes from our global object.
 534     bool foundGlobalObject = false;
 535     for (JSObject* current = object; ;) {
 536         if (current->globalObject() == m_globalObject) {
 537             foundGlobalObject = true;
 538             break;
 539         }
 540
 541         JSValue prototypeValue = current->prototype();
 542         if (prototypeValue.isNull())
 543             break;
 544         current = asObject(prototypeValue);
 545     }
 546     if (!foundGlobalObject)
 547         return;
 548
 549     m_foundObjects.append(object);
 550 }
 551
 552 } // end private namespace for helpers for JSGlobalObject::haveABadTime()
 553
 554 void JSGlobalObject::haveABadTime(VM& vm)
 555 {
 556     ASSERT(&vm == &this->vm());
 557
 558     if (isHavingABadTime())
 559         return;
 560
 561     // Make sure that all allocations or indexed storage transitions that are inlining
 562     // the assumption that it's safe to transition to a non-SlowPut array storage don't
 563     // do so anymore.
 564     m_havingABadTimeWatchpoint->fireAll();
 565     ASSERT(isHavingABadTime()); // The watchpoint is what tells us that we're having a bad time.
 566
 567     // Make sure that all JSArray allocations that load the appropriate structure from
 568     // this object now load a structure that uses SlowPut.
 569     for (unsigned i = 0; i < NumberOfIndexingShapes; ++i)
 570         m_arrayStructureForIndexingShapeDuringAllocation[i].set(vm, this, originalArrayStructureForIndexingType(ArrayWithSlowPutArrayStorage));
 571
 572     // Make sure that all objects that have indexed storage switch to the slow kind of
 573     // indexed storage.
 574     MarkedArgumentBuffer foundObjects; // Use MarkedArgumentBuffer because switchToSlowPutArrayStorage() may GC.
 575     ObjectsWithBrokenIndexingFinder finder(foundObjects, this);
 576     {
 577         HeapIterationScope iterationScope(vm.heap);
 578         vm.heap.objectSpace().forEachLiveCell(iterationScope, finder);
 579     }
 580     while (!foundObjects.isEmpty()) {
 581         JSObject* object = asObject(foundObjects.last());
 582         foundObjects.removeLast();
 583         ASSERT(hasBrokenIndexing(object));
 584         object->switchToSlowPutArrayStorage(vm);
 585     }
 586 }
 587
 588 bool JSGlobalObject::objectPrototypeIsSane()
 589 {
 590     return !hasIndexedProperties(m_objectPrototype->indexingType())
 591         && m_objectPrototype->prototype().isNull();
 592 }
 593
 594 bool JSGlobalObject::arrayPrototypeChainIsSane()
 595 {
 596     return !hasIndexedProperties(m_arrayPrototype->indexingType())
 597         && m_arrayPrototype->prototype() == m_objectPrototype.get()
 598         && objectPrototypeIsSane();
 599 }
 600
 601 bool JSGlobalObject::stringPrototypeChainIsSane()
 602 {
 603     return !hasIndexedProperties(m_stringPrototype->indexingType())
 604         && m_stringPrototype->prototype() == m_objectPrototype.get()
 605         && objectPrototypeIsSane();
 606 }
 607
 608 void JSGlobalObject::createThrowTypeError(VM& vm)
 609 {
 610     JSFunction* thrower = JSFunction::create(vm, this, 0, String(), globalFuncThrowTypeError);
 611     GetterSetter* getterSetter = GetterSetter::create(vm);
 612     getterSetter->setGetter(vm, thrower);
 613     getterSetter->setSetter(vm, thrower);
 614     m_throwTypeErrorGetterSetter.set(vm, this, getterSetter);
 615 }
 616
 617 // Set prototype, and also insert the object prototype at the end of the chain.
 618 void JSGlobalObject::resetPrototype(VM& vm, JSValue prototype)
 619 {
 620     setPrototype(vm, prototype);
 621
 622     JSObject* oldLastInPrototypeChain = lastInPrototypeChain(this);
 623     JSObject* objectPrototype = m_objectPrototype.get();
 624     if (oldLastInPrototypeChain != objectPrototype)
 625         oldLastInPrototypeChain->setPrototype(vm, objectPrototype);
 626
 627     // Whenever we change the prototype of the global object, we need to create a new JSProxy with the correct prototype.
 628     setGlobalThis(vm, JSProxy::create(vm, JSProxy::createStructure(vm, this, prototype, PureForwardingProxyType), this));
 629 }
 630
 631 void JSGlobalObject::visitChildren(JSCell* cell, SlotVisitor& visitor)
 632 {
 633     JSGlobalObject* thisObject = jsCast<JSGlobalObject*>(cell);
 634     ASSERT_GC_OBJECT_INHERITS(thisObject, info());
 635     COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
 636     ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
 637     Base::visitChildren(thisObject, visitor);
 638
 639     visitor.append(&thisObject->m_globalThis);
 640
 641     visitor.append(&thisObject->m_regExpConstructor);
 642     visitor.append(&thisObject->m_errorConstructor);
 643     visitor.append(&thisObject->m_evalErrorConstructor);
 644     visitor.append(&thisObject->m_rangeErrorConstructor);
 645     visitor.append(&thisObject->m_referenceErrorConstructor);
 646     visitor.append(&thisObject->m_syntaxErrorConstructor);
 647     visitor.append(&thisObject->m_typeErrorConstructor);
 648     visitor.append(&thisObject->m_URIErrorConstructor);
 649     visitor.append(&thisObject->m_objectConstructor);
 650 #if ENABLE(PROMISES)
 651     visitor.append(&thisObject->m_promiseConstructor);
 652 #endif
 653
 654     visitor.append(&thisObject->m_evalFunction);
 655     visitor.append(&thisObject->m_callFunction);
 656     visitor.append(&thisObject->m_applyFunction);
 657     visitor.append(&thisObject->m_throwTypeErrorGetterSetter);
 658
 659     visitor.append(&thisObject->m_objectPrototype);
 660     visitor.append(&thisObject->m_functionPrototype);
 661     visitor.append(&thisObject->m_arrayPrototype);
 662     visitor.append(&thisObject->m_errorPrototype);
 663 #if ENABLE(PROMISES)
 664     visitor.append(&thisObject->m_promisePrototype);
 665 #endif
 666
 667     visitor.append(&thisObject->m_withScopeStructure);
 668     visitor.append(&thisObject->m_strictEvalActivationStructure);
 669     visitor.append(&thisObject->m_activationStructure);
 670     visitor.append(&thisObject->m_nameScopeStructure);
 671     visitor.append(&thisObject->m_argumentsStructure);
 672     for (unsigned i = 0; i < NumberOfIndexingShapes; ++i)
 673         visitor.append(&thisObject->m_originalArrayStructureForIndexingShape[i]);
 674     for (unsigned i = 0; i < NumberOfIndexingShapes; ++i)
 675         visitor.append(&thisObject->m_arrayStructureForIndexingShapeDuringAllocation[i]);
 676     visitor.append(&thisObject->m_booleanObjectStructure);
 677     visitor.append(&thisObject->m_callbackConstructorStructure);
 678     visitor.append(&thisObject->m_callbackFunctionStructure);
 679     visitor.append(&thisObject->m_callbackObjectStructure);
 680 #if JSC_OBJC_API_ENABLED
 681     visitor.append(&thisObject->m_objcCallbackFunctionStructure);
 682     visitor.append(&thisObject->m_objcWrapperObjectStructure);
 683 #endif
 684     visitor.append(&thisObject->m_nullPrototypeObjectStructure);
 685     visitor.append(&thisObject->m_errorStructure);
 686     visitor.append(&thisObject->m_functionStructure);
 687     visitor.append(&thisObject->m_boundFunctionStructure);
 688     visitor.append(&thisObject->m_namedFunctionStructure);
 689     visitor.append(&thisObject->m_privateNameStructure);
 690     visitor.append(&thisObject->m_regExpMatchesArrayStructure);
 691     visitor.append(&thisObject->m_regExpStructure);
 692     visitor.append(&thisObject->m_consoleStructure);
 693     visitor.append(&thisObject->m_internalFunctionStructure);
 694
 695 #if ENABLE(PROMISES)
 696     visitor.append(&thisObject->m_promiseStructure);
 697 #endif // ENABLE(PROMISES)
 698
 699 #define VISIT_SIMPLE_TYPE(CapitalName, lowerName, properName, instanceType, jsName) \
 700     visitor.append(&thisObject->m_ ## lowerName ## Prototype); \
 701     visitor.append(&thisObject->m_ ## properName ## Structure); \
 702
 703     FOR_EACH_SIMPLE_BUILTIN_TYPE(VISIT_SIMPLE_TYPE)
 704
 705 #undef VISIT_SIMPLE_TYPE
 706
 707     for (unsigned i = NUMBER_OF_TYPED_ARRAY_TYPES; i--;) {
 708         visitor.append(&thisObject->m_typedArrays[i].prototype);
 709         visitor.append(&thisObject->m_typedArrays[i].structure);
 710     }
 711 }
 712
 713 JSValue JSGlobalObject::toThis(JSCell*, ExecState* exec, ECMAMode ecmaMode)
 714 {
 715     if (ecmaMode == StrictMode)
 716         return jsUndefined();
 717     return exec->globalThisValue();
 718 }
 719
 720 ExecState* JSGlobalObject::globalExec()
 721 {
 722     return CallFrame::create(m_globalCallFrame);
 723 }
 724
 725 void JSGlobalObject::addStaticGlobals(GlobalPropertyInfo* globals, int count)
 726 {
 727     addRegisters(count);
 728
 729     for (int i = 0; i < count; ++i) {
 730         GlobalPropertyInfo& global = globals[i];
 731         ASSERT(global.attributes & DontDelete);
 732
 733         int index = symbolTable()->size();
 734         SymbolTableEntry newEntry(index, global.attributes);
 735         symbolTable()->add(global.identifier.impl(), newEntry);
 736         registerAt(index).set(vm(), this, global.value);
 737     }
 738 }
 739
 740 bool JSGlobalObject::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
 741 {
 742     JSGlobalObject* thisObject = jsCast<JSGlobalObject*>(object);
 743     if (getStaticFunctionSlot<Base>(exec, ExecState::globalObjectTable(exec->vm()), thisObject, propertyName, slot))
 744         return true;
 745     return symbolTableGet(thisObject, propertyName, slot);
 746 }
 747
 748 void JSGlobalObject::clearRareData(JSCell* cell)
 749 {
 750     jsCast<JSGlobalObject*>(cell)->m_rareData.clear();
 751 }
 752
 753 void slowValidateCell(JSGlobalObject* globalObject)
 754 {
 755     RELEASE_ASSERT(globalObject->isGlobalObject());
 756     ASSERT_GC_OBJECT_INHERITS(globalObject, JSGlobalObject::info());
 757 }
 758
 759 UnlinkedProgramCodeBlock* JSGlobalObject::createProgramCodeBlock(CallFrame* callFrame, ProgramExecutable* executable, JSObject** exception)
 760 {
 761     ParserError error;
 762     JSParserStrictness strictness = executable->isStrictMode() ? JSParseStrict : JSParseNormal;
 763     DebuggerMode debuggerMode = hasDebugger() ? DebuggerOn : DebuggerOff;
 764     ProfilerMode profilerMode = hasProfiler() ? ProfilerOn : ProfilerOff;
 765     UnlinkedProgramCodeBlock* unlinkedCodeBlock = vm().codeCache()->getProgramCodeBlock(vm(), executable, executable->source(), strictness, debuggerMode, profilerMode, error);
 766
 767     if (hasDebugger())
 768         debugger()->sourceParsed(callFrame, executable->source().provider(), error.m_line, error.m_message);
 769
 770     if (error.m_type != ParserError::ErrorNone) {
 771         *exception = error.toErrorObject(this, executable->source());
 772         return 0;
 773     }
 774
 775     return unlinkedCodeBlock;
 776 }
 777
 778 UnlinkedEvalCodeBlock* JSGlobalObject::createEvalCodeBlock(CallFrame* callFrame, EvalExecutable* executable)
 779 {
 780     ParserError error;
 781     JSParserStrictness strictness = executable->isStrictMode() ? JSParseStrict : JSParseNormal;
 782     DebuggerMode debuggerMode = hasDebugger() ? DebuggerOn : DebuggerOff;
 783     ProfilerMode profilerMode = hasProfiler() ? ProfilerOn : ProfilerOff;
 784     UnlinkedEvalCodeBlock* unlinkedCodeBlock = vm().codeCache()->getEvalCodeBlock(vm(), executable, executable->source(), strictness, debuggerMode, profilerMode, error);
 785
 786     if (hasDebugger())
 787         debugger()->sourceParsed(callFrame, executable->source().provider(), error.m_line, error.m_message);
 788
 789     if (error.m_type != ParserError::ErrorNone) {
 790         throwVMError(callFrame, error.toErrorObject(this, executable->source()));
 791         return 0;
 792     }
 793
 794     return unlinkedCodeBlock;
 795 }
 796
 797 void JSGlobalObject::setRemoteDebuggingEnabled(bool enabled)
 798 {
 799 #if ENABLE(REMOTE_INSPECTOR)
 800     m_inspectorDebuggable->setRemoteDebuggingAllowed(enabled);
 801 #else
 802     UNUSED_PARAM(enabled);
 803 #endif
 804 }
 805
 806 bool JSGlobalObject::remoteDebuggingEnabled() const
 807 {
 808 #if ENABLE(REMOTE_INSPECTOR)
 809     return m_inspectorDebuggable->remoteDebuggingAllowed();
 810 #else
 811     return false;
 812 #endif
 813 }
 814
 815 #if ENABLE(WEB_REPLAY)
 816 void JSGlobalObject::setInputCursor(PassRefPtr<InputCursor> prpCursor)
 817 {
 818     m_inputCursor = prpCursor;
 819     ASSERT(m_inputCursor);
 820
 821     InputCursor& cursor = inputCursor();
 822     // Save or set the random seed. This performed here rather than the constructor
 823     // to avoid threading the input cursor through all the abstraction layers.
 824     if (cursor.isCapturing())
 825         cursor.appendInput<SetRandomSeed>(m_weakRandom.seedUnsafe());
 826     else if (cursor.isReplaying()) {
 827         if (SetRandomSeed* input = cursor.fetchInput<SetRandomSeed>())
 828             m_weakRandom.initializeSeed(static_cast<unsigned>(input->randomSeed()));
 829     }
 830 }
 831 #endif
 832
 833 void JSGlobalObject::setName(const String& name)
 834 {
 835     m_name = name;
 836
 837 #if ENABLE(REMOTE_INSPECTOR)
 838     m_inspectorDebuggable->update();
 839 #endif
 840 }
 841
 842 void JSGlobalObject::queueMicrotask(PassRefPtr<Microtask> task)
 843 {
 844     if (globalObjectMethodTable()->queueTaskToEventLoop)
 845         globalObjectMethodTable()->queueTaskToEventLoop(this, task);
 846     else
 847         WTFLogAlways("ERROR: Event loop not supported.");
 848 }
 849
 850 } // namespace JSC