--- /dev/null
+/*
+ * Copyright (C) 2008 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.
+ * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ * its contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "JSActivation.h"
+
+#include "Arguments.h"
+#include "Interpreter.h"
+#include "JSFunction.h"
+
+namespace JSC {
+
+ASSERT_CLASS_FITS_IN_CELL(JSActivation);
+
+const ClassInfo JSActivation::info = { "JSActivation", 0, 0, 0 };
+
+JSActivation::JSActivation(CallFrame* callFrame, PassRefPtr<FunctionBodyNode> functionBody)
+ : Base(callFrame->globalData().activationStructure, new JSActivationData(functionBody, callFrame))
+{
+}
+
+JSActivation::~JSActivation()
+{
+ delete d();
+}
+
+void JSActivation::mark()
+{
+ Base::mark();
+
+ Register* registerArray = d()->registerArray.get();
+ if (!registerArray)
+ return;
+
+ size_t numParametersMinusThis = d()->functionBody->generatedBytecode().m_numParameters - 1;
+
+ size_t i = 0;
+ size_t count = numParametersMinusThis;
+ for ( ; i < count; ++i) {
+ Register& r = registerArray[i];
+ if (!r.marked())
+ r.mark();
+ }
+
+ size_t numVars = d()->functionBody->generatedBytecode().m_numVars;
+
+ // Skip the call frame, which sits between the parameters and vars.
+ i += RegisterFile::CallFrameHeaderSize;
+ count += RegisterFile::CallFrameHeaderSize + numVars;
+
+ for ( ; i < count; ++i) {
+ Register& r = registerArray[i];
+ if (!r.marked())
+ r.mark();
+ }
+}
+
+bool JSActivation::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
+{
+ if (symbolTableGet(propertyName, slot))
+ return true;
+
+ if (JSValuePtr* location = getDirectLocation(propertyName)) {
+ slot.setValueSlot(location);
+ return true;
+ }
+
+ // Only return the built-in arguments object if it wasn't overridden above.
+ if (propertyName == exec->propertyNames().arguments) {
+ slot.setCustom(this, getArgumentsGetter());
+ return true;
+ }
+
+ // We don't call through to JSObject because there's no way to give an
+ // activation object getter properties or a prototype.
+ ASSERT(!hasGetterSetterProperties());
+ ASSERT(prototype().isNull());
+ return false;
+}
+
+void JSActivation::put(ExecState*, const Identifier& propertyName, JSValuePtr value, PutPropertySlot& slot)
+{
+ ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
+
+ if (symbolTablePut(propertyName, value))
+ return;
+
+ // We don't call through to JSObject because __proto__ and getter/setter
+ // properties are non-standard extensions that other implementations do not
+ // expose in the activation object.
+ ASSERT(!hasGetterSetterProperties());
+ putDirect(propertyName, value, 0, true, slot);
+}
+
+// FIXME: Make this function honor ReadOnly (const) and DontEnum
+void JSActivation::putWithAttributes(ExecState*, const Identifier& propertyName, JSValuePtr value, unsigned attributes)
+{
+ ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(this));
+
+ if (symbolTablePutWithAttributes(propertyName, value, attributes))
+ return;
+
+ // We don't call through to JSObject because __proto__ and getter/setter
+ // properties are non-standard extensions that other implementations do not
+ // expose in the activation object.
+ ASSERT(!hasGetterSetterProperties());
+ PutPropertySlot slot;
+ putDirect(propertyName, value, attributes, true, slot);
+}
+
+bool JSActivation::deleteProperty(ExecState* exec, const Identifier& propertyName)
+{
+ if (propertyName == exec->propertyNames().arguments)
+ return false;
+
+ return Base::deleteProperty(exec, propertyName);
+}
+
+JSObject* JSActivation::toThisObject(ExecState* exec) const
+{
+ return exec->globalThisValue();
+}
+
+bool JSActivation::isDynamicScope() const
+{
+ return d()->functionBody->usesEval();
+}
+
+JSValuePtr JSActivation::argumentsGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
+{
+ JSActivation* activation = asActivation(slot.slotBase());
+
+ if (activation->d()->functionBody->usesArguments()) {
+ PropertySlot slot;
+ activation->symbolTableGet(exec->propertyNames().arguments, slot);
+ return slot.getValue(exec, exec->propertyNames().arguments);
+ }
+
+ CallFrame* callFrame = CallFrame::create(activation->d()->registers);
+ Arguments* arguments = callFrame->optionalCalleeArguments();
+ if (!arguments) {
+ arguments = new (callFrame) Arguments(callFrame);
+ arguments->copyRegisters();
+ callFrame->setCalleeArguments(arguments);
+ }
+ ASSERT(arguments->isObject(&Arguments::info));
+
+ return arguments;
+}
+
+// These two functions serve the purpose of isolating the common case from a
+// PIC branch.
+
+PropertySlot::GetValueFunc JSActivation::getArgumentsGetter()
+{
+ return argumentsGetter;
+}
+
+} // namespace JSC
projects / apple / javascriptcore.git / blobdiff