runtime/JSSymbolTableObject.cpp

   1 /*
   2  * Copyright (C) 2012, 2013 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  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "config.h"
  30 #include "JSSymbolTableObject.h"
  31
  32 #include "JSActivation.h"
  33 #include "JSGlobalObject.h"
  34 #include "JSNameScope.h"
  35 #include "JSCInlines.h"
  36 #include "PropertyNameArray.h"
  37
  38 namespace JSC {
  39
  40 void JSSymbolTableObject::visitChildren(JSCell* cell, SlotVisitor& visitor)
  41 {
  42     JSSymbolTableObject* thisObject = jsCast<JSSymbolTableObject*>(cell);
  43     ASSERT_GC_OBJECT_INHERITS(thisObject, info());
  44     COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
  45     ASSERT(thisObject->structure()->typeInfo().overridesVisitChildren());
  46
  47     Base::visitChildren(thisObject, visitor);
  48     visitor.append(&thisObject->m_symbolTable);
  49 }
  50
  51 bool JSSymbolTableObject::deleteProperty(JSCell* cell, ExecState* exec, PropertyName propertyName)
  52 {
  53     JSSymbolTableObject* thisObject = jsCast<JSSymbolTableObject*>(cell);
  54     if (thisObject->symbolTable()->contains(propertyName.publicName()))
  55         return false;
  56
  57     return JSObject::deleteProperty(thisObject, exec, propertyName);
  58 }
  59
  60 void JSSymbolTableObject::getOwnNonIndexPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
  61 {
  62     JSSymbolTableObject* thisObject = jsCast<JSSymbolTableObject*>(object);
  63     {
  64         ConcurrentJITLocker locker(thisObject->symbolTable()->m_lock);
  65         SymbolTable::Map::iterator end = thisObject->symbolTable()->end(locker);
  66         for (SymbolTable::Map::iterator it = thisObject->symbolTable()->begin(locker); it != end; ++it) {
  67             if (it->key->isEmptyUnique())
  68                 continue;
  69             if (!(it->value.getAttributes() & DontEnum) || (mode == IncludeDontEnumProperties))
  70                 propertyNames.add(Identifier(exec, it->key.get()));
  71         }
  72     }
  73
  74     JSObject::getOwnNonIndexPropertyNames(thisObject, exec, propertyNames, mode);
  75 }
  76
  77 } // namespace JSC