qscriptengineagent.cpp

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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtScript module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL-ONLY$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you have questions regarding the use of this file, please contact
** us via http://www.qt-project.org/.
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** $QT_END_LICENSE$
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****************************************************************************/

#include "config.h"
#include "qscriptengineagent.h"
#include "qscriptengineagent_p.h"
#include "qscriptengine.h"
#include "qscriptengine_p.h"

#include "CodeBlock.h"
#include "Instruction.h"

QT_BEGIN_NAMESPACE

void QScriptEngineAgentPrivate::attach()
{
    if (engine->originalGlobalObject()->debugger())
        engine->originalGlobalObject()->setDebugger(0);
    JSC::Debugger::attach(engine->originalGlobalObject());
    if (!QScriptEnginePrivate::get(engine)->isEvaluating())
        JSC::Debugger::recompileAllJSFunctions(engine->globalData);
}

void QScriptEngineAgentPrivate::detach()
{
    JSC::Debugger::detach(engine->originalGlobalObject());
}

void QScriptEngineAgentPrivate::returnEvent(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, int lineno)
{
    Q_UNUSED(frame);
    Q_UNUSED(lineno);
    Q_UNUSED(sourceID);
}

void QScriptEngineAgentPrivate::exceptionThrow(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, bool hasHandler)
{
    JSC::CallFrame *oldFrame = engine->currentFrame;
    int oldAgentLineNumber = engine->agentLineNumber;
    engine->currentFrame = frame.callFrame();
    QScriptValue value(engine->scriptValueFromJSCValue(frame.exception()));
    engine->agentLineNumber = value.property(QLatin1String("lineNumber")).toInt32();
    q_ptr->exceptionThrow(sourceID, value, hasHandler);
    engine->agentLineNumber = oldAgentLineNumber;
    engine->currentFrame = oldFrame;
    engine->setCurrentException(value);
};

void QScriptEngineAgentPrivate::exceptionCatch(const JSC::DebuggerCallFrame& frame, intptr_t sourceID)
{
    JSC::CallFrame *oldFrame = engine->currentFrame;
    engine->currentFrame = frame.callFrame();
    QScriptValue value(engine->scriptValueFromJSCValue(frame.exception()));
    q_ptr->exceptionCatch(sourceID, value);
    engine->currentFrame = oldFrame;
    engine->clearCurrentException();
}

void QScriptEngineAgentPrivate::atStatement(const JSC::DebuggerCallFrame& frame, intptr_t sourceID, int lineno/*, int column*/)
{
    QScript::UStringSourceProviderWithFeedback *source = engine->loadedScripts.value(sourceID);
    if (!source) {
        // QTBUG-6108: We don't have the source for this script, so ignore.
        return;
    }
//    column = source->columnNumberFromOffset(column);
    int column = 1;
    JSC::CallFrame *oldFrame = engine->currentFrame;
    int oldAgentLineNumber = engine->agentLineNumber;
    engine->currentFrame = frame.callFrame();
    engine->agentLineNumber = lineno;
    q_ptr->positionChange(sourceID, lineno, column);
    engine->currentFrame = oldFrame;
    engine->agentLineNumber = oldAgentLineNumber;
}

void QScriptEngineAgentPrivate::functionExit(const JSC::JSValue& returnValue, intptr_t sourceID)
{
    QScriptValue result = engine->scriptValueFromJSCValue(returnValue);
    q_ptr->functionExit(sourceID, result);
    q_ptr->contextPop();
}

void QScriptEngineAgentPrivate::evaluateStop(const JSC::JSValue& returnValue, intptr_t sourceID)
{
    QScriptValue result = engine->scriptValueFromJSCValue(returnValue);
    q_ptr->functionExit(sourceID, result);
}

void QScriptEngineAgentPrivate::didReachBreakpoint(const JSC::DebuggerCallFrame& frame,
                                                   intptr_t sourceID, int lineno/*, int column*/)
{
    if (q_ptr->supportsExtension(QScriptEngineAgent::DebuggerInvocationRequest)) {
        QScript::UStringSourceProviderWithFeedback *source = engine->loadedScripts.value(sourceID);
        if (!source) {
            // QTBUG-6108: We don't have the source for this script, so ignore.
            return;
        }
//        column = source->columnNumberFromOffset(column);
        int column = 1;
        JSC::CallFrame *oldFrame = engine->currentFrame;
        int oldAgentLineNumber = engine->agentLineNumber;
        engine->currentFrame = frame.callFrame();
        engine->agentLineNumber = lineno;
        QList<QVariant> args;
        args << qint64(sourceID) << lineno << column;
        q_ptr->extension(QScriptEngineAgent::DebuggerInvocationRequest, args);
        engine->currentFrame = oldFrame;
        engine->agentLineNumber = oldAgentLineNumber;
    }
};

QScriptEngineAgent::QScriptEngineAgent(QScriptEngine *engine)
        : d_ptr(new QScriptEngineAgentPrivate())
{
    d_ptr->q_ptr = this;
    d_ptr->engine = QScriptEnginePrivate::get(engine);
    d_ptr->engine->ownedAgents.append(this);
}

QScriptEngineAgent::QScriptEngineAgent(QScriptEngineAgentPrivate &dd, QScriptEngine *engine)
    : d_ptr(&dd)
{
    d_ptr->q_ptr = this;
    d_ptr->engine = QScriptEnginePrivate::get(engine);
}

QScriptEngineAgent::~QScriptEngineAgent()
{
    d_ptr->engine->agentDeleted(this); //### TODO: Can this throw?
}

void QScriptEngineAgent::scriptLoad(qint64 id, const QString &program,
                                    const QString &fileName, int baseLineNumber)
{
    Q_UNUSED(id);
    Q_UNUSED(program);
    Q_UNUSED(fileName);
    Q_UNUSED(baseLineNumber);
}

void QScriptEngineAgent::scriptUnload(qint64 id)
{
    Q_UNUSED(id);
}

void QScriptEngineAgent::contextPush()
{
}

void QScriptEngineAgent::contextPop()
{
}

void QScriptEngineAgent::functionEntry(qint64 scriptId)
{
    Q_UNUSED(scriptId);
}

void QScriptEngineAgent::functionExit(qint64 scriptId,
                                      const QScriptValue &returnValue)
{
    Q_UNUSED(scriptId);
    Q_UNUSED(returnValue);
}

void QScriptEngineAgent::positionChange(qint64 scriptId,
                                        int lineNumber, int columnNumber)
{
    Q_UNUSED(scriptId);
    Q_UNUSED(lineNumber);
    Q_UNUSED(columnNumber);
}

void QScriptEngineAgent::exceptionThrow(qint64 scriptId,
                                        const QScriptValue &exception,
                                        bool hasHandler)
{
    Q_UNUSED(scriptId);
    Q_UNUSED(exception);
    Q_UNUSED(hasHandler);
}

void QScriptEngineAgent::exceptionCatch(qint64 scriptId,
                                        const QScriptValue &exception)
{
    Q_UNUSED(scriptId);
    Q_UNUSED(exception);
}

#if 0

void QScriptEngineAgent::propertyChange(qint64 scriptId,
                                        const QScriptValue &object,
                                        const QString &propertyName,
                                        PropertyChange change)
{
    Q_UNUSED(scriptId);
    Q_UNUSED(object);
    Q_UNUSED(propertyName);
    Q_UNUSED(change);
}
#endif

bool QScriptEngineAgent::supportsExtension(Extension extension) const
{
    Q_UNUSED(extension);
    return false;
}

QVariant QScriptEngineAgent::extension(Extension extension,
                                       const QVariant &argument)
{
    Q_UNUSED(extension);
    Q_UNUSED(argument);
    return QVariant();
}

QScriptEngine *QScriptEngineAgent::engine() const
{
    Q_D(const QScriptEngineAgent);
    return QScriptEnginePrivate::get(d->engine);
}

QT_END_NAMESPACE