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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef Q_CTF_H
#define Q_CTF_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 <qtcoreexports.h>
#include <qobject.h>
QT_BEGIN_NAMESPACE
struct QCtfTraceMetadata;
struct Q_CORE_EXPORT QCtfTracePointProvider
{
const QString provider;
QCtfTraceMetadata *metadata;
QCtfTracePointProvider(const QString &provider)
: provider(provider), metadata(nullptr)
{
}
};
struct Q_CORE_EXPORT QCtfTraceMetadata
{
const QString name;
const QString metadata;
QCtfTraceMetadata(QCtfTracePointProvider &provider, const QString &name, const QString &metadata)
: name(name), metadata(metadata)
{
next = provider.metadata;
provider.metadata = this;
}
QCtfTraceMetadata *next = nullptr;
};
struct QCtfTracePointPrivate;
struct Q_CORE_EXPORT QCtfTracePointEvent
{
const QCtfTracePointProvider &provider;
const QString eventName;
const QString metadata;
const int size;
const bool variableSize;
QCtfTracePointEvent(const QCtfTracePointProvider &provider, const QString &name, const QString &metadata, int size, bool variableSize)
: provider(provider), eventName(name), metadata(metadata), size(size), variableSize(variableSize)
{
}
QCtfTracePointPrivate *d = nullptr;
};
Q_CORE_EXPORT bool _tracepoint_enabled(const QCtfTracePointEvent &point);
Q_CORE_EXPORT void _do_tracepoint(const QCtfTracePointEvent &point, const QByteArray &arr);
Q_CORE_EXPORT QCtfTracePointPrivate *_initialize_tracepoint(const QCtfTracePointEvent &point);
#ifndef BUILD_LIBRARY
#include <QtCore/qbytearray.h>
#include <QtCore/qstring.h>
#include <QtCore/qurl.h>
namespace trace {
inline void toByteArray(QByteArray &)
{
}
inline void toByteArray(QByteArray &arr, const QString &value)
{
arr.append(value.toUtf8());
arr.append((char)0);
}
inline void toByteArray(QByteArray &arr, const QUrl &value)
{
arr.append(value.toString().toUtf8());
arr.append((char)0);
}
inline void toByteArray(QByteArray &arr, const QByteArray &data)
{
arr.append(data);
}
template <typename T>
inline void toByteArray(QByteArray &arr, T value)
{
arr.append((char *)&value, sizeof(value));
}
template <typename T, typename... Ts>
inline void toByteArray(QByteArray &arr, T value, Ts... args)
{
toByteArray(arr, value);
toByteArray(arr, args...);
}
inline QByteArray toByteArray()
{
return {};
}
template <typename... Ts>
inline QByteArray toByteArray(Ts... args)
{
QByteArray data;
toByteArray(data, args...);
return data;
}
template <typename T>
inline QByteArray toByteArrayFromArray(const T *values, int arraySize)
{
QByteArray data;
data.append((char *)values, arraySize * sizeof(T));
return data;
}
template <typename IntegerType, typename T>
inline QByteArray toByteArrayFromEnum(T value)
{
IntegerType e = static_cast<IntegerType>(value);
QByteArray data;
data.append((char *)&e, sizeof(e));
return data;
}
inline QByteArray toByteArrayFromCString(const char *str)
{
QByteArray data;
if (str && *str != 0)
data.append(str);
data.append((char)0);
return data;
}
static inline void appendFlags(QByteArray &data, quint8 &count, quint32 value)
{
count = 0;
quint8 d = 1;
while (value) {
if (value&1) {
data.append(d);
count++;
}
d++;
value >>= 1;
}
}
template <typename T>
inline QByteArray toByteArrayFromFlags(QFlags<T> value)
{
quint32 intValue = static_cast<quint32>(value.toInt());
quint8 count;
QByteArray data;
data.append((char)0);
if (intValue == 0) {
data.append((char)0);
data.data()[0] = 1;
} else {
appendFlags(data, count, intValue);
data.data()[0] = count;
}
return data;
}
} // trace
#define _DEFINE_EVENT(provider, event, metadata, size, varSize) \
static QCtfTracePointEvent _ctf_ ## event = QCtfTracePointEvent(_ctf_provider_ ## provider, QStringLiteral(QT_STRINGIFY(event)), metadata, size, varSize);
#define _DEFINE_METADATA(provider, name, metadata) \
static QCtfTraceMetadata _ctf_metadata_ ## name = QCtfTraceMetadata(_ctf_provider_ ## provider, QStringLiteral(QT_STRINGIFY(name)), metadata);
#define _DEFINE_TRACEPOINT_PROVIDER(provider) \
static QCtfTracePointProvider _ctf_provider_ ## provider = QCtfTracePointProvider(QStringLiteral(QT_STRINGIFY(provider)));
#define TRACEPOINT_EVENT(provider, event, metadata, size, varSize) \
_DEFINE_EVENT(provider, event, metadata, size, varSize)
#define TRACEPOINT_PROVIDER(provider) \
_DEFINE_TRACEPOINT_PROVIDER(provider)
#define TRACEPOINT_METADATA(provider, name, metadata) \
_DEFINE_METADATA(provider, name, metadata)
#define tracepoint_enabled(provider, event) \
_tracepoint_enabled(_ctf_ ## event)
#define do_tracepoint(provider, event, ...) \
{ \
auto &tp = _ctf_ ## event; \
if (!tp.d) \
tp.d = _initialize_tracepoint(tp); \
if (tp.d) { \
QByteArray data(tp.size, 0); \
if (!tp.metadata.isEmpty()) \
data = trace::toByteArray(__VA_ARGS__); \
_do_tracepoint(tp, data); \
} \
}
#define tracepoint(provider, name, ...) \
do { \
if (tracepoint_enabled(provider, name)) \
do_tracepoint(provider, name, __VA_ARGS__); \
} while (0)
#endif
class Q_CORE_EXPORT QCtfLib : public QObject
{
Q_OBJECT
Q_DISABLE_COPY(QCtfLib)
public:
explicit QCtfLib(QObject *parent = nullptr) : QObject(parent) {}
virtual ~QCtfLib() = default;
virtual bool tracepointEnabled(const QCtfTracePointEvent &point) = 0;
virtual void doTracepoint(const QCtfTracePointEvent &point, const QByteArray &arr) = 0;
virtual bool sessionEnabled() = 0;
virtual QCtfTracePointPrivate *initializeTracepoint(const QCtfTracePointEvent &point) = 0;
virtual void shutdown(bool *shutdown) = 0;
};
QT_END_NAMESPACE
#endif
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