| /**************************************************************************** |
| ** |
| ** Copyright (C) 2017 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the test suite of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL-EXCEPT$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
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| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT |
| ** included in the packaging of this file. Please review the following |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| |
| #ifndef EMULATIONDETECTOR_H |
| #define EMULATIONDETECTOR_H |
| |
| #include <QtCore/qglobal.h> |
| |
| #if defined(Q_OS_LINUX) && defined(Q_PROCESSOR_ARM) |
| #define SHOULD_CHECK_ARM_ON_X86 |
| |
| #include <QFileInfo> |
| |
| #if QT_CONFIG(process) && QT_CONFIG(regularexpression) |
| #include <QProcess> |
| #include <QRegularExpression> |
| #endif |
| |
| #endif |
| |
| QT_BEGIN_NAMESPACE |
| |
| // Helper functions for detecting if running emulated |
| namespace EmulationDetector { |
| |
| #ifdef SHOULD_CHECK_ARM_ON_X86 |
| static bool isX86SpecificFileAvailable(void); |
| static bool isReportedArchitectureX86(void); |
| #endif |
| |
| /* |
| * Check if we are running Arm binary on x86 machine. |
| * |
| * Currently this is only able to check on Linux. If not able to |
| * detect, return false. |
| */ |
| static bool isRunningArmOnX86() |
| { |
| #ifdef SHOULD_CHECK_ARM_ON_X86 |
| if (isX86SpecificFileAvailable()) |
| return true; |
| |
| if (isReportedArchitectureX86()) |
| return true; |
| #endif |
| return false; |
| } |
| |
| #ifdef SHOULD_CHECK_ARM_ON_X86 |
| /* |
| * Check if we can find a file that's only available on x86 |
| */ |
| static bool isX86SpecificFileAvailable() |
| { |
| // MTRR (Memory Type Range Registers) are a feature of the x86 architecture |
| // and /proc/mtrr is only present (on Linux) for that family. |
| // However, it's an optional kernel feature, so the absence of the file is |
| // not sufficient to conclude we're on real hardware. |
| QFileInfo mtrr("/proc/mtrr"); |
| if (mtrr.exists()) |
| return true; |
| return false; |
| } |
| |
| /* |
| * Check if architecture reported by the OS is x86 |
| */ |
| static bool isReportedArchitectureX86(void) |
| { |
| #if QT_CONFIG(process) && QT_CONFIG(regularexpression) |
| QProcess unamer; |
| QString machineString; |
| |
| // Using syscall "uname" is not possible since that would be captured by |
| // QEMU and result would be the architecture being emulated (e.g. armv7l). |
| // By using QProcess we get the architecture used by the host. |
| unamer.start("uname -a"); |
| if (!unamer.waitForFinished()) { |
| return false; |
| } |
| machineString = unamer.readAll(); |
| |
| // Is our current host cpu x86? |
| if (machineString.contains(QRegularExpression("i386|i686|x86"))) { |
| return true; |
| } |
| #endif |
| |
| return false; |
| } |
| #endif // SHOULD_CHECK_ARM_ON_X86 |
| |
| } // EmulationDetector namespace |
| |
| QT_END_NAMESPACE |
| |
| #endif |
| |