93e0265e4e
Once in a while, we receive complaints from other fellow KDE developers about the file organization of kwin. This change addresses some of those complaints by moving all of source code in a separate directory, src/, thus making the project structure more traditional. Things such as tests are kept in their own toplevel directories. This change may wreak havoc on merge requests that add new files to kwin, but if a patch modifies an already existing file, git should be smart enough to figure out that the file has been relocated. We may potentially split the src/ directory further to make navigating the source code easier, but hopefully this is good enough already.
121 lines
3 KiB
C++
121 lines
3 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2021 David Edmundson <davidedmundson@kde.org>
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SPDX-FileCopyrightText: 2020 Roman Gilg <subdiff@gmail.com>
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SPDX-License-Identifier: LGPL-2.0-or-later
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*/
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#include "ftrace.h"
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#include <QDBusConnection>
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#include <QDebug>
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#include <QDir>
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#include <QFile>
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#include <QFileInfo>
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#include <QScopeGuard>
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#include <QTextStream>
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namespace KWin
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{
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KWIN_SINGLETON_FACTORY(KWin::FTraceLogger)
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FTraceLogger::FTraceLogger(QObject *parent)
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: QObject(parent)
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{
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if (qEnvironmentVariableIsSet("KWIN_PERF_FTRACE")) {
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setEnabled(true);
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} else {
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QDBusConnection::sessionBus().registerObject(QStringLiteral("/FTrace"), this, QDBusConnection::ExportScriptableContents);
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}
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}
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bool FTraceLogger::isEnabled() const
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{
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return m_file.isOpen();
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}
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void FTraceLogger::setEnabled(bool enabled)
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{
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QMutexLocker lock(&m_mutex);
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if (enabled == isEnabled()) {
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return;
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}
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if (enabled) {
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open();
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} else {
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m_file.close();
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}
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emit enabledChanged();
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}
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bool FTraceLogger::open()
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{
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const QString path = filePath();
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if (path.isEmpty()) {
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return false;
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}
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m_file.setFileName(path);
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if (!m_file.open(QIODevice::WriteOnly)) {
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qWarning() << "No access to trace marker file at:" << path;
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}
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return true;
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}
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QString FTraceLogger::filePath()
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{
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if (qEnvironmentVariableIsSet("KWIN_PERF_FTRACE_FILE")) {
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return qgetenv("KWIN_PERF_FTRACE_FILE");
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}
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QFile mountsFile("/proc/mounts");
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if (!mountsFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
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qWarning() << "No access to mounts file. Can not determine trace marker file location.";
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return QString();
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}
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auto lineInfo = [](const QString &line) {
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const int start = line.indexOf(' ') + 1;
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const int end = line.indexOf(' ', start);
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const QString dirPath(line.mid(start, end - start));
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if (dirPath.isEmpty() || !QFileInfo(dirPath).exists()) {
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return QFileInfo();
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}
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return QFileInfo(QDir(dirPath), QStringLiteral("trace_marker"));
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};
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QFileInfo markerFileInfo;
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QTextStream mountsIn(&mountsFile);
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QString mountsLine = mountsIn.readLine();
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while (!mountsLine.isNull()) {
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if (mountsLine.startsWith("tracefs")) {
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const auto info = lineInfo(mountsLine);
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if (info.exists()) {
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markerFileInfo = info;
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break;
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}
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}
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if (mountsLine.startsWith("debugfs")) {
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markerFileInfo = lineInfo(mountsLine);
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}
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mountsLine = mountsIn.readLine();
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}
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mountsFile.close();
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if (!markerFileInfo.exists()) {
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qWarning() << "Could not determine trace marker file location from mounts.";
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return QString();
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}
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return markerFileInfo.absoluteFilePath();
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}
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FTraceDuration::~FTraceDuration()
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{
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FTraceLogger::self()->trace(m_message, " end_ctx=", m_context);
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}
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}
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