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/****************************************************************************
**
** Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Enterprise Perf Profiler Add-on.
**
** GNU General Public License Usage
** This file may be used under the terms of the GNU General Public License
** version 3 as published by the Free Software Foundation and appearing in
** the file LICENSE.GPLv3 included in the packaging of this file. Please
** review the following information to ensure the GNU General Public License
** requirements will be met: https://www.gnu.org/licenses/gpl.html.
**
** If you have questions regarding the use of this file, please use
** contact form at http://www.qt.io/contact-us
**
****************************************************************************/
#include "perfkallsyms.h"
#include <QFile>
#include <QTextStream>
#include <algorithm>
bool PerfKallsyms::parseMapping(const QString &path)
{
m_entries.clear();
m_errorString.clear();
QFile file(path);
if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
m_errorString = file.errorString();
return false;
}
QTextStream stream(&file);
stream.setLocale(QLocale::c());
QByteArray address;
// NOTE: don't use atEnd here, as /proc/kallsyms is has size of 0
bool valid = true;
while (true) {
PerfKallsymEntry entry;
char type = 0;
char eol = '\n';
stream >> address >> ws >> type >> ws >> entry.symbol >> eol;
if (address.isEmpty())
break;
bool ok = false;
entry.address = address.toULongLong(&ok, 16);
if (!ok && address != "(null)") {
m_errorString = tr("Invalid address: %1").arg(QString::fromUtf8(address));
valid = false;
break;
}
if (eol == '\t')
stream >> entry.module;
m_entries.push_back(entry);
}
if (valid && m_entries.isEmpty()) {
m_errorString = tr("Mapping is empty.");
return false;
}
std::sort(m_entries.begin(), m_entries.end(),
[](const PerfKallsymEntry& lhs, const PerfKallsymEntry& rhs) -> bool {
return lhs.address < rhs.address;
});
return valid;
}
PerfKallsymEntry PerfKallsyms::findEntry(quint64 address) const
{
auto entry = std::upper_bound(m_entries.begin(), m_entries.end(), address,
[](quint64 address, const PerfKallsymEntry& entry) -> bool {
return address < entry.address;
});
if (entry != m_entries.begin()) {
--entry;
return *entry;
}
return {};
}
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