| | 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 | |
| | 32 | namespace JSC { |
| | 33 | |
| | 34 | const ClassInfo JSNameScope::s_info = { "NameScope", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSNameScope) }; |
| | 35 | |
| | 36 | void 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 | |
| | 47 | JSObject* JSNameScope::toThisObject(JSCell*, ExecState* exec) |
| | 48 | { |
| | 49 | return exec->globalThisValue(); |
| | 50 | } |
| | 51 | |
| | 52 | void 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 | |
| | 76 | bool JSNameScope::getOwnPropertySlot(JSCell* cell, ExecState*, PropertyName propertyName, PropertySlot& slot) |
| | 77 | { |
| | 78 | return symbolTableGet(jsCast<JSNameScope*>(cell), propertyName, slot); |
| | 79 | } |
| | 80 | |
| | 81 | } // namespace JSC |
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