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 "JSCInlines.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, 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 47JSValue JSNameScope::toThis(JSCell*, ExecState* exec, ECMAMode ecmaMode) 48{ 49 if (ecmaMode == StrictMode) 50 return jsUndefined(); 51 return exec->globalThisValue(); 52} 53 54void JSNameScope::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot) 55{ 56 JSNameScope* thisObject = jsCast<JSNameScope*>(cell); 57 if (slot.isStrictMode()) { 58 // Double lookup in strict mode, but this only occurs when 59 // a) indirectly writing to an exception slot 60 // b) writing to a function expression name 61 // (a) is unlikely, and (b) is an error. 62 // Also with a single entry the symbol table lookup should simply be 63 // a pointer compare. 64 PropertySlot slot(thisObject); 65 bool isWritable = true; 66 symbolTableGet(thisObject, propertyName, slot, isWritable); 67 if (!isWritable) { 68 exec->vm().throwException(exec, createTypeError(exec, StrictModeReadonlyPropertyWriteError)); 69 return; 70 } 71 } 72 if (symbolTablePut(thisObject, exec, propertyName, value, slot.isStrictMode())) 73 return; 74 75 RELEASE_ASSERT_NOT_REACHED(); 76} 77 78bool JSNameScope::getOwnPropertySlot(JSObject* object, ExecState*, PropertyName propertyName, PropertySlot& slot) 79{ 80 return symbolTableGet(jsCast<JSNameScope*>(object), propertyName, slot); 81} 82 83} // namespace JSC 84