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Diffstat (limited to 'src/plugins/qmltooling/qmldbg_debugger/qv4debugger.h')
| -rw-r--r-- | src/plugins/qmltooling/qmldbg_debugger/qv4debugger.h | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/plugins/qmltooling/qmldbg_debugger/qv4debugger.h b/src/plugins/qmltooling/qmldbg_debugger/qv4debugger.h new file mode 100644 index 0000000000..adc58141d0 --- /dev/null +++ b/src/plugins/qmltooling/qmldbg_debugger/qv4debugger.h @@ -0,0 +1,183 @@ +/**************************************************************************** +** +** 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); + + // 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 |