webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 98 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/JSPropertyNameEnumerator.cpp b/Source/JavaScriptCore/runtime/JSPropertyNameEnumerator.cpp
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+++ b/Source/JavaScriptCore/runtime/JSPropertyNameEnumerator.cpp
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+/*
+ * Copyright (C) 2014-2016 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. AND ITS CONTRIBUTORS ``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 ITS 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 "JSPropertyNameEnumerator.h"
+
+#include "JSCInlines.h"
+#include "LockDuringMarking.h"
+#include "StrongInlines.h"
+
+namespace JSC {
+
+const ClassInfo JSPropertyNameEnumerator::s_info = { "JSPropertyNameEnumerator", 0, 0, CREATE_METHOD_TABLE(JSPropertyNameEnumerator) };
+
+JSPropertyNameEnumerator* JSPropertyNameEnumerator::create(VM& vm)
+{
+    if (!vm.emptyPropertyNameEnumerator.get()) {
+        PropertyNameArray propertyNames(&vm, PropertyNameMode::Strings);
+        vm.emptyPropertyNameEnumerator = Strong<JSCell>(vm, create(vm, 0, 0, 0, WTFMove(propertyNames)));
+    }
+    return jsCast<JSPropertyNameEnumerator*>(vm.emptyPropertyNameEnumerator.get());
+}
+
+JSPropertyNameEnumerator* JSPropertyNameEnumerator::create(VM& vm, Structure* structure, uint32_t indexedLength, uint32_t numberStructureProperties, PropertyNameArray&& propertyNames)
+{
+    StructureID structureID = structure ? structure->id() : 0;
+    uint32_t inlineCapacity = structure ? structure->inlineCapacity() : 0;
+    JSPropertyNameEnumerator* enumerator = new (NotNull, 
+        allocateCell<JSPropertyNameEnumerator>(vm.heap)) JSPropertyNameEnumerator(vm, structureID, inlineCapacity);
+    enumerator->finishCreation(vm, indexedLength, numberStructureProperties, propertyNames.releaseData());
+    return enumerator;
+}
+
+JSPropertyNameEnumerator::JSPropertyNameEnumerator(VM& vm, StructureID structureID, uint32_t inlineCapacity)
+    : JSCell(vm, vm.propertyNameEnumeratorStructure.get())
+    , m_cachedStructureID(structureID)
+    , m_cachedInlineCapacity(inlineCapacity)
+{
+}
+
+void JSPropertyNameEnumerator::finishCreation(VM& vm, uint32_t indexedLength, uint32_t endStructurePropertyIndex, RefPtr<PropertyNameArrayData>&& identifiers)
+{
+    Base::finishCreation(vm);
+
+    PropertyNameArrayData::PropertyNameVector& vector = identifiers->propertyNameVector();
+
+    m_indexedLength = indexedLength;
+    m_endStructurePropertyIndex = endStructurePropertyIndex;
+    m_endGenericPropertyIndex = vector.size();
+
+    {
+        auto locker = lockDuringMarking(vm.heap, *this);
+        m_propertyNames.resizeToFit(vector.size());
+    }
+    for (unsigned i = 0; i < vector.size(); ++i) {
+        const Identifier& identifier = vector[i];
+        m_propertyNames[i].set(vm, this, jsString(&vm, identifier.string()));
+    }
+}
+
+void JSPropertyNameEnumerator::destroy(JSCell* cell)
+{
+    static_cast<JSPropertyNameEnumerator*>(cell)->JSPropertyNameEnumerator::~JSPropertyNameEnumerator();
+}
+
+void JSPropertyNameEnumerator::visitChildren(JSCell* cell, SlotVisitor& visitor)
+{
+    Base::visitChildren(cell, visitor);
+    JSPropertyNameEnumerator* thisObject = jsCast<JSPropertyNameEnumerator*>(cell);
+    auto locker = holdLock(*thisObject);
+    for (auto& propertyName : thisObject->m_propertyNames)
+        visitor.append(propertyName);
+    visitor.append(thisObject->m_prototypeChain);
+}
+
+} // namespace JSC