source: webkit/trunk/JavaScriptCore/kjs/DebuggerCallFrame.cpp@ 34838

/*
 * Copyright (C) 2008 Apple Inc. All rights reserved.
 *
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 * 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.
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 *     notice, this list of conditions and the following disclaimer in the
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 *     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
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#include "config.h"
#include "DebuggerCallFrame.h"

#include "JSFunction.h"
#include "CodeBlock.h"
#include "Machine.h"
#include "Parser.h"

namespace KJS {

Register* DebuggerCallFrame::r() const
{
    return *m_registerBase + m_registerOffset;
}

Register* DebuggerCallFrame::callFrame() const
{
    return r() - m_codeBlock->numLocals - RegisterFile::CallFrameHeaderSize;
}

const UString* DebuggerCallFrame::functionName() const
{
    if (!m_codeBlock)
        return 0;

    JSFunction* function = static_cast<JSFunction*>(callFrame()[RegisterFile::Callee].u.jsValue);
    if (!function)
        return 0;
    return &function->functionName().ustring();
}

DebuggerCallFrame::Type DebuggerCallFrame::type() const
{
    if (callFrame()[RegisterFile::Callee].u.jsObject)
        return FunctionType;

    return ProgramType;
}

JSObject* DebuggerCallFrame::thisObject() const
{
    if (!m_codeBlock)
        return 0;

    return static_cast<JSObject*>(r()[m_codeBlock->thisRegister].u.jsValue);
}

JSValue* DebuggerCallFrame::evaluate(const UString& script, JSValue*& exception) const
{
    if (!m_codeBlock)
        return 0;

    JSObject* thisObject = this->thisObject();

    ExecState newExec(m_scopeChain->globalObject(), thisObject, m_scopeChain);

    int sourceId;
    int errLine;
    UString errMsg;

    RefPtr<EvalNode> evalNode = newExec.parser()->parse<EvalNode>(&newExec, UString(), 1, UStringSourceProvider::create(script), &sourceId, &errLine, &errMsg);

    if (!evalNode)
        return Error::create(&newExec, SyntaxError, errMsg, errLine, sourceId, 0);

    return newExec.machine()->execute(evalNode.get(), &newExec, thisObject, m_scopeChain, &exception);
}

} // namespace KJS