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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2015-05-20 09:56:07 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2015-05-20 09:56:07 +0000 |
commit | 41386e9cb918eed93b3f13648cbef387e371e451 (patch) | |
tree | a97f9d7bd1d9d091833286085f72da9d83fd0606 /Source/JavaScriptCore/runtime/JSNameScope.cpp | |
parent | e15dd966d523731101f70ccf768bba12435a0208 (diff) | |
download | WebKitGtk-tarball-41386e9cb918eed93b3f13648cbef387e371e451.tar.gz |
webkitgtk-2.4.9webkitgtk-2.4.9
Diffstat (limited to 'Source/JavaScriptCore/runtime/JSNameScope.cpp')
-rw-r--r-- | Source/JavaScriptCore/runtime/JSNameScope.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/runtime/JSNameScope.cpp b/Source/JavaScriptCore/runtime/JSNameScope.cpp new file mode 100644 index 000000000..76542f676 --- /dev/null +++ b/Source/JavaScriptCore/runtime/JSNameScope.cpp @@ -0,0 +1,83 @@ +/* + * Copyright (C) 2008, 2009, 2012 Apple Inc. All Rights Reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "config.h" +#include "JSNameScope.h" + +#include "Error.h" +#include "Operations.h" + +namespace JSC { + +const ClassInfo JSNameScope::s_info = { "NameScope", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSNameScope) }; + +void JSNameScope::visitChildren(JSCell* cell, SlotVisitor& visitor) +{ + JSNameScope* thisObject = jsCast<JSNameScope*>(cell); + ASSERT_GC_OBJECT_INHERITS(thisObject, info()); + COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag); + ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren()); + + Base::visitChildren(thisObject, visitor); + visitor.append(&thisObject->m_registerStore); +} + +JSValue JSNameScope::toThis(JSCell*, ExecState* exec, ECMAMode ecmaMode) +{ + if (ecmaMode == StrictMode) + return jsUndefined(); + return exec->globalThisValue(); +} + +void JSNameScope::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot) +{ + JSNameScope* thisObject = jsCast<JSNameScope*>(cell); + if (slot.isStrictMode()) { + // Double lookup in strict mode, but this only occurs when + // a) indirectly writing to an exception slot + // b) writing to a function expression name + // (a) is unlikely, and (b) is an error. + // Also with a single entry the symbol table lookup should simply be + // a pointer compare. + PropertySlot slot(thisObject); + bool isWritable = true; + symbolTableGet(thisObject, propertyName, slot, isWritable); + if (!isWritable) { + exec->vm().throwException(exec, createTypeError(exec, StrictModeReadonlyPropertyWriteError)); + return; + } + } + if (symbolTablePut(thisObject, exec, propertyName, value, slot.isStrictMode())) + return; + + RELEASE_ASSERT_NOT_REACHED(); +} + +bool JSNameScope::getOwnPropertySlot(JSObject* object, ExecState*, PropertyName propertyName, PropertySlot& slot) +{ + return symbolTableGet(jsCast<JSNameScope*>(object), propertyName, slot); +} + +} // namespace JSC |