Satellite profiler for V4

Self-contained profiler for V4. By itself it doesn't have any
connections to qqmlprofilerservice.

Change-Id: I471a6119e07eab9c5f4712a16835be49c8886d1a
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

1 files changed, 169 insertions, 0 deletions

diff --git a/src/qml/jsruntime/qv4profiling_p.h b/src/qml/jsruntime/qv4profiling_p.h
new file mode 100644
index 0000000000..6869b3134d
--- /dev/null
+++ b/src/qml/jsruntime/qv4profiling_p.h
@@ -0,0 +1,169 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml 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 QV4PROFILING_H
+#define QV4PROFILING_H
+
+#include "qv4global_p.h"
+#include "qv4engine_p.h"
+#include "qv4function_p.h"
+
+#include <QElapsedTimer>
+
+QT_BEGIN_NAMESPACE
+
+namespace QV4 {
+
+namespace Profiling {
+
+struct FunctionCallProperties {
+    qint64 start;
+    qint64 end;
+    QString name;
+    QString file;
+    int line;
+    int column;
+};
+
+class FunctionCall {
+public:
+
+    FunctionCall() : m_function(0), m_start(0), m_end(0)
+    { Q_ASSERT_X(false, Q_FUNC_INFO, "Cannot construct a function call without function"); }
+
+    FunctionCall(Function *function, qint64 start, qint64 end) :
+        m_function(function), m_start(start), m_end(end)
+    { m_function->compilationUnit->ref(); }
+
+    FunctionCall(const FunctionCall &other) :
+        m_function(other.m_function), m_start(other.m_start), m_end(other.m_end)
+    { m_function->compilationUnit->ref(); }
+
+    ~FunctionCall()
+    { m_function->compilationUnit->deref(); }
+
+    FunctionCall &operator=(const FunctionCall &other) {
+        if (&other != this) {
+            if (m_function)
+                m_function->compilationUnit->deref();
+            m_function = other.m_function;
+            m_start = other.m_start;
+            m_end = other.m_end;
+            m_function->compilationUnit->ref();
+        }
+        return *this;
+    }
+
+    FunctionCallProperties resolve() const;
+
+private:
+
+    Function *m_function;
+    qint64 m_start;
+    qint64 m_end;
+};
+
+#define Q_V4_PROFILE(engine, ctx, function)\
+    ((engine->profiler && engine->profiler->enabled) ?\
+        Profiling::FunctionCallProfiler::profileCall(engine->profiler, ctx, function) :\
+        function->code(ctx, function->codeData))
+
+class Q_QML_EXPORT Profiler : public QObject {
+    Q_OBJECT
+    Q_DISABLE_COPY(Profiler)
+public:
+    Profiler();
+
+    bool enabled;
+
+public slots:
+    void stopProfiling();
+    void startProfiling();
+    void reportData();
+    void setTimer(const QElapsedTimer &timer) { m_timer = timer; }
+
+signals:
+    void dataReady(const QList<QV4::Profiling::FunctionCallProperties> &);
+
+private:
+    QElapsedTimer m_timer;
+    QVector<FunctionCall> m_data;
+
+    friend class FunctionCallProfiler;
+};
+
+class FunctionCallProfiler {
+    Q_DISABLE_COPY(FunctionCallProfiler)
+public:
+
+    // It's enough to ref() the function in the destructor as it will probably not disappear while
+    // it's executing ...
+    FunctionCallProfiler(Profiler *profiler, Function *function) :
+        profiler(profiler), function(function), startTime(profiler->m_timer.nsecsElapsed())
+    {}
+
+    ~FunctionCallProfiler()
+    {
+        profiler->m_data.append(FunctionCall(function, startTime, profiler->m_timer.nsecsElapsed()));
+    }
+
+    static ReturnedValue profileCall(Profiler *profiler, ExecutionContext *ctx, Function *function)
+    {
+        FunctionCallProfiler callProfiler(profiler, function);
+        return function->code(ctx, function->codeData);
+    }
+
+    Profiler *profiler;
+    Function *function;
+    qint64 startTime;
+};
+
+
+} // namespace Profiling
+} // namespace QV4
+
+Q_DECLARE_TYPEINFO(QV4::Profiling::FunctionCallProperties, Q_MOVABLE_TYPE);
+Q_DECLARE_TYPEINFO(QV4::Profiling::FunctionCall, Q_MOVABLE_TYPE);
+
+QT_END_NAMESPACE
+Q_DECLARE_METATYPE(QList<QV4::Profiling::FunctionCallProperties>)
+
+#endif // QV4PROFILING_H