1 files changed, 119 insertions, 0 deletions
diff --git a/src/corelib/tracing/qctf.cpp b/src/corelib/tracing/qctf.cpp
new file mode 100644
index 00000000000..22bb587acd4
--- /dev/null
+++ b/src/corelib/tracing/qctf.cpp
@@ -0,0 +1,119 @@
+// 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
+
+#define BUILD_LIBRARY
+
+#include <qthread.h>
+#include <qpluginloader.h>
+#include <qfileinfo.h>
+#include <qdir.h>
+
+#include "qctflib_p.h"
+
+QT_BEGIN_NAMESPACE
+
+static bool s_initialized = false;
+static bool s_triedLoading = false;
+static bool s_prevent_recursion = false;
+static QCtfLib* s_plugin = nullptr;
+
+#if defined(Q_OS_ANDROID)
+static QString findPlugin(const QString &plugin)
+{
+    QString pluginPath = QString::fromUtf8(qgetenv("QT_PLUGIN_PATH"));
+    QDir dir(pluginPath);
+    const QStringList files = dir.entryList(QDir::Files);
+    for (const QString &file : files) {
+        if (file.contains(plugin))
+            return QFileInfo(pluginPath + QLatin1Char('/') + file).absoluteFilePath();
+    }
+    return {};
+}
+#endif
+
+static bool loadPlugin(bool &retry)
+{
+    retry = false;
+#ifdef Q_OS_WIN
+#ifdef QT_DEBUG
+    QPluginLoader loader(QStringLiteral("tracing/QCtfTracePlugind.dll"));
+#else
+    QPluginLoader loader(QStringLiteral("tracing/QCtfTracePlugin.dll"));
+#endif
+#elif defined(Q_OS_ANDROID)
+
+    QString plugin = findPlugin(QStringLiteral("QCtfTracePlugin"));
+    if (plugin.isEmpty()) {
+        retry = true;
+        return false;
+    }
+    QPluginLoader loader(plugin);
+#else
+    QPluginLoader loader(QStringLiteral("tracing/libQCtfTracePlugin.so"));
+#endif
+
+    if (!loader.isLoaded()) {
+        if (!loader.load())
+            return false;
+    }
+    s_plugin = qobject_cast<QCtfLib *>(loader.instance());
+    if (!s_plugin)
+        return false;
+    QObject *obj = loader.instance();
+    if (obj) {
+        QObject::connect(obj, &QObject::destroyed, []() {
+            s_plugin = nullptr;
+        });
+    }
+    return true;
+}
+
+static bool initialize()
+{
+    if (s_prevent_recursion)
+        return false;
+    if (s_initialized || s_triedLoading)
+        return s_initialized;
+    s_prevent_recursion = true;
+    bool retry = false;
+    if (!loadPlugin(retry)) {
+        if (!retry) {
+            s_triedLoading = true;
+            s_initialized = false;
+        }
+    } else {
+        bool enabled = s_plugin->sessionEnabled();
+        if (!enabled) {
+            s_triedLoading = true;
+            s_initialized = false;
+        } else {
+            s_initialized = true;
+        }
+    }
+    s_prevent_recursion = false;
+    return s_initialized;
+}
+
+bool _tracepoint_enabled(const QCtfTracePointEvent &point)
+{
+    if (!initialize())
+        return false;
+    return s_plugin ? s_plugin->tracepointEnabled(point) : false;
+}
+
+void _do_tracepoint(const QCtfTracePointEvent &point, const QByteArray &arr)
+{
+    if (!initialize())
+        return;
+    if (s_plugin)
+        s_plugin->doTracepoint(point, arr);
+}
+
+QCtfTracePointPrivate *_initialize_tracepoint(const QCtfTracePointEvent &point)
+{
+    if (!initialize())
+        return nullptr;
+    return s_plugin ? s_plugin->initializeTracepoint(point) : nullptr;
+}
+
+QT_END_NAMESPACE