1/* 2 * Copyright (C) 2008, 2009, 2012 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "JSNameScope.h" 28 29#include "Error.h" 30#include "Operations.h" 31 32namespace JSC { 33 34const ClassInfo JSNameScope::s_info = { "NameScope", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSNameScope) }; 35 36void JSNameScope::visitChildren(JSCell* cell, SlotVisitor& visitor) 37{ 38 JSNameScope* thisObject = jsCast<JSNameScope*>(cell); 39 ASSERT_GC_OBJECT_INHERITS(thisObject, &s_info); 40 COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag); 41 ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren()); 42 43 Base::visitChildren(thisObject, visitor); 44 visitor.append(&thisObject->m_registerStore); 45} 46 47JSObject* JSNameScope::toThisObject(JSCell*, ExecState* exec) 48{ 49 return exec->globalThisValue(); 50} 51 52void JSNameScope::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot) 53{ 54 JSNameScope* thisObject = jsCast<JSNameScope*>(cell); 55 if (slot.isStrictMode()) { 56 // Double lookup in strict mode, but this only occurs when 57 // a) indirectly writing to an exception slot 58 // b) writing to a function expression name 59 // (a) is unlikely, and (b) is an error. 60 // Also with a single entry the symbol table lookup should simply be 61 // a pointer compare. 62 PropertySlot slot; 63 bool isWritable = true; 64 symbolTableGet(thisObject, propertyName, slot, isWritable); 65 if (!isWritable) { 66 throwError(exec, createTypeError(exec, StrictModeReadonlyPropertyWriteError)); 67 return; 68 } 69 } 70 if (symbolTablePut(thisObject, exec, propertyName, value, slot.isStrictMode())) 71 return; 72 73 RELEASE_ASSERT_NOT_REACHED(); 74} 75 76bool JSNameScope::getOwnPropertySlot(JSCell* cell, ExecState*, PropertyName propertyName, PropertySlot& slot) 77{ 78 return symbolTableGet(jsCast<JSNameScope*>(cell), propertyName, slot); 79} 80 81} // namespace JSC 82