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/*
* Copyright (C) 2005, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "ExceptionHelpers.h"
#include "Interpreter.h"
#include "PropertySlot.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
#include "JSObject.h"
namespace JSC {
JSValue PropertySlot::functionGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
{
// Prevent getter functions from observing execution if an exception is pending.
if (exec->hadException())
return exec->exception();
CallData callData;
CallType callType = slot.m_data.getterFunc->getCallData(callData);
if (callType == CallTypeHost) {
ScopeChainNode* scopeChain = exec->scopeChain();
Interpreter *interp = exec->interpreter();
Register *oldEnd = interp->registerFile().end();
int argc = 1; // implicit "this" parameter
if (!interp->registerFile().grow(oldEnd + argc + RegisterFile::CallFrameHeaderSize))
return createStackOverflowError(exec);
JSC::CallFrame* newCallFrame = JSC::CallFrame::create(oldEnd);
newCallFrame[0] = slot.slotBase(); // this
newCallFrame += argc + JSC::RegisterFile::CallFrameHeaderSize;
newCallFrame->init(0, /*vPC=*/0, scopeChain, exec, 0, argc, slot.m_data.getterFunc);
JSValue result = callData.native.function(newCallFrame, slot.m_data.getterFunc, slot.slotBase(), exec->emptyList());
interp->registerFile().shrink(oldEnd);
return result;
}
ASSERT(callType == CallTypeJS);
// FIXME: Can this be done more efficiently using the callData?
return static_cast<JSFunction*>(slot.m_data.getterFunc)->call(exec, slot.slotBase(), exec->emptyList());
}
} // namespace JSC
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