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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QV4DEBUGGER_H
#define QV4DEBUGGER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <private/qv4debugging_p.h>
#include <private/qv4function_p.h>
#include <private/qv4context_p.h>
#include <private/qv4persistent_p.h>
#include <QtCore/qmutex.h>
#include <QtCore/qwaitcondition.h>
QT_BEGIN_NAMESPACE
class QV4Debugger : public QV4::Debugging::Debugger
{
Q_OBJECT
public:
struct BreakPoint {
BreakPoint(const QString &fileName, int line);
QString fileName;
int lineNumber;
};
class Job
{
public:
virtual ~Job();
virtual void run() = 0;
};
class JavaScriptJob: public Job
{
QV4::ExecutionEngine *engine;
int frameNr;
const QString &script;
bool resultIsException;
public:
JavaScriptJob(QV4::ExecutionEngine *engine, int frameNr, const QString &script);
void run();
bool hasExeption() const;
protected:
virtual void handleResult(QV4::ScopedValue &result) = 0;
};
enum State {
Running,
Paused
};
enum Speed {
FullThrottle = 0,
StepOut,
StepOver,
StepIn,
NotStepping = FullThrottle
};
enum PauseReason {
PauseRequest,
BreakPointHit,
Throwing,
Step
};
QV4Debugger(QV4::ExecutionEngine *engine);
QV4::ExecutionEngine *engine() const;
void pause();
void resume(Speed speed);
State state() const;
void addBreakPoint(const QString &fileName, int lineNumber,
const QString &condition = QString());
void removeBreakPoint(const QString &fileName, int lineNumber);
void setBreakOnThrow(bool onoff);
void clearPauseRequest();
// used for testing
struct ExecutionState
{
QString fileName;
int lineNumber;
};
ExecutionState currentExecutionState() const;
QVector<QV4::StackFrame> stackTrace(int frameLimit = -1) const;
QVector<QV4::Heap::ExecutionContext::ContextType> getScopeTypes(int frame = 0) const;
QV4::Function *getFunction() const;
void runInEngine(Job *job);
// compile-time interface
void maybeBreakAtInstruction() Q_DECL_OVERRIDE;
// execution hooks
void enteringFunction() Q_DECL_OVERRIDE;
void leavingFunction(const QV4::ReturnedValue &retVal) Q_DECL_OVERRIDE;
void aboutToThrow() Q_DECL_OVERRIDE;
bool pauseAtNextOpportunity() const Q_DECL_OVERRIDE;
signals:
void debuggerPaused(QV4Debugger *self, QV4Debugger::PauseReason reason);
private:
// requires lock to be held
void pauseAndWait(PauseReason reason);
bool reallyHitTheBreakPoint(const QString &filename, int linenr);
void runInEngine_havingLock(QV4Debugger::Job *job);
QV4::ExecutionEngine *m_engine;
QV4::PersistentValue m_currentContext;
QMutex m_lock;
QWaitCondition m_runningCondition;
State m_state;
Speed m_stepping;
bool m_pauseRequested;
bool m_haveBreakPoints;
bool m_breakOnThrow;
QHash<BreakPoint, QString> m_breakPoints;
QV4::PersistentValue m_returnedValue;
Job *m_gatherSources;
Job *m_runningJob;
QWaitCondition m_jobIsRunning;
};
QT_END_NAMESPACE
Q_DECLARE_METATYPE(QV4Debugger::PauseReason)
Q_DECLARE_METATYPE(QV4Debugger*)
#endif // QV4DEBUGGER_H
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