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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the V4VM module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef DEBUGGING_H
#define DEBUGGING_H
#include "qv4global.h"
#include "qv4engine.h"
#include "qv4context.h"
#include <QHash>
QT_BEGIN_NAMESPACE
namespace QQmlJS {
namespace V4IR {
struct BasicBlock;
struct Function;
} // namespace IR
namespace Debugging {
class Debugger;
struct FunctionDebugInfo { // TODO: use opaque d-pointers here
QString name;
unsigned startLine, startColumn;
FunctionDebugInfo(V4IR::Function *function):
startLine(0), startColumn(0)
{
if (function->name)
name = *function->name;
}
void setSourceLocation(unsigned line, unsigned column)
{ startLine = line; startColumn = column; }
};
class FunctionState
{
public:
FunctionState(VM::ExecutionContext *context);
virtual ~FunctionState();
virtual VM::Value *argument(unsigned idx);
virtual VM::Value *local(unsigned idx);
virtual VM::Value *temp(unsigned idx) = 0;
VM::ExecutionContext *context() const
{ return _context; }
Debugger *debugger() const
{ return _context->engine->debugger; }
private:
VM::ExecutionContext *_context;
};
struct CallInfo
{
VM::ExecutionContext *context;
VM::FunctionObject *function;
FunctionState *state;
CallInfo(VM::ExecutionContext *context = 0, VM::FunctionObject *function = 0, FunctionState *state = 0)
: context(context)
, function(function)
, state(state)
{}
};
class Q_V4_EXPORT Debugger
{
public:
Debugger(VM::ExecutionEngine *_engine);
~Debugger();
public: // compile-time interface
void addFunction(V4IR::Function *function);
void setSourceLocation(V4IR::Function *function, unsigned line, unsigned column);
void mapFunction(VM::Function *vmf, V4IR::Function *irf);
public: // run-time querying interface
FunctionDebugInfo *debugInfo(VM::FunctionObject *function) const;
QString name(VM::FunctionObject *function) const;
public: // execution hooks
void aboutToCall(VM::FunctionObject *function, VM::ExecutionContext *context);
void justLeft(VM::ExecutionContext *context);
void enterFunction(FunctionState *state);
void leaveFunction(FunctionState *state);
void aboutToThrow(const VM::Value &value);
public: // debugging hooks
FunctionState *currentState() const;
const char *currentArg(unsigned idx) const;
const char *currentLocal(unsigned idx) const;
const char *currentTemp(unsigned idx) const;
void printStackTrace() const;
private:
int callIndex(VM::ExecutionContext *context);
V4IR::Function *irFunction(VM::Function *vmf) const;
private: // TODO: use opaque d-pointers here
VM::ExecutionEngine *_engine;
QHash<V4IR::Function *, FunctionDebugInfo *> _functionInfo;
QHash<VM::Function *, V4IR::Function *> _vmToIr;
QVector<CallInfo> _callStack;
};
} // namespace Debugging
} // namespace QQmlJS
QT_END_NAMESPACE
#endif // DEBUGGING_H
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