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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_p.h"
+#include "qv4engine_p.h"
+#include "qv4context_p.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