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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtTest module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtTest/private/qbenchmark_p.h>
#ifdef QTESTLIB_USE_VALGRIND
#include <QtTest/private/qbenchmarkvalgrind_p.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qcoreapplication.h>
#include <QtCore/qprocess.h>
#include <QtCore/qdir.h>
#include <QtCore/qset.h>
#include <QtTest/private/callgrind_p.h>
QT_BEGIN_NAMESPACE
// Returns \c true if valgrind is available.
bool QBenchmarkValgrindUtils::haveValgrind()
{
#ifdef NVALGRIND
return false;
#else
QProcess process;
process.start(QLatin1String("valgrind"), QStringList(QLatin1String("--version")));
return process.waitForStarted() && process.waitForFinished(-1);
#endif
}
// Reruns this program through callgrind.
// Returns \c true upon success, otherwise false.
bool QBenchmarkValgrindUtils::rerunThroughCallgrind(const QStringList &origAppArgs, int &exitCode)
{
if (!QBenchmarkValgrindUtils::runCallgrindSubProcess(origAppArgs, exitCode)) {
qWarning("failed to run callgrind subprocess");
return false;
}
return true;
}
static void dumpOutput(const QByteArray &data, FILE *fh)
{
QFile file;
file.open(fh, QIODevice::WriteOnly);
file.write(data);
}
qint64 QBenchmarkValgrindUtils::extractResult(const QString &fileName)
{
QFile file(fileName);
const bool openOk = file.open(QIODevice::ReadOnly | QIODevice::Text);
Q_ASSERT(openOk);
Q_UNUSED(openOk);
qint64 val = -1;
bool valSeen = false;
QRegExp rxValue(QLatin1String("^summary: (\\d+)"));
while (!file.atEnd()) {
const QString line(QLatin1String(file.readLine()));
if (rxValue.indexIn(line) != -1) {
Q_ASSERT(rxValue.captureCount() == 1);
bool ok;
val = rxValue.cap(1).toLongLong(&ok);
Q_ASSERT(ok);
valSeen = true;
break;
}
}
if (!valSeen)
qFatal("Failed to extract result");
return val;
}
// Gets the newest file name (i.e. the one with the highest integer suffix).
QString QBenchmarkValgrindUtils::getNewestFileName()
{
QStringList nameFilters;
QString base = QBenchmarkGlobalData::current->callgrindOutFileBase;
Q_ASSERT(!base.isEmpty());
nameFilters << QString::fromLatin1("%1.*").arg(base);
QFileInfoList fiList = QDir().entryInfoList(nameFilters, QDir::Files | QDir::Readable);
Q_ASSERT(!fiList.empty());
int hiSuffix = -1;
QFileInfo lastFileInfo;
const QString pattern = QString::fromLatin1("%1.(\\d+)").arg(base);
QRegExp rx(pattern);
foreach (const QFileInfo &fileInfo, fiList) {
const int index = rx.indexIn(fileInfo.fileName());
Q_ASSERT(index == 0);
Q_UNUSED(index);
bool ok;
const int suffix = rx.cap(1).toInt(&ok);
Q_ASSERT(ok);
Q_ASSERT(suffix >= 0);
if (suffix > hiSuffix) {
lastFileInfo = fileInfo;
hiSuffix = suffix;
}
}
return lastFileInfo.fileName();
}
qint64 QBenchmarkValgrindUtils::extractLastResult()
{
return extractResult(getNewestFileName());
}
void QBenchmarkValgrindUtils::cleanup()
{
QStringList nameFilters;
QString base = QBenchmarkGlobalData::current->callgrindOutFileBase;
Q_ASSERT(!base.isEmpty());
nameFilters
<< base // overall summary
<< QString::fromLatin1("%1.*").arg(base); // individual dumps
QFileInfoList fiList = QDir().entryInfoList(nameFilters, QDir::Files | QDir::Readable);
foreach (const QFileInfo &fileInfo, fiList) {
const bool removeOk = QFile::remove(fileInfo.fileName());
Q_ASSERT(removeOk);
Q_UNUSED(removeOk);
}
}
QString QBenchmarkValgrindUtils::outFileBase(qint64 pid)
{
return QString::fromLatin1("callgrind.out.%1").arg(
pid != -1 ? pid : QCoreApplication::applicationPid());
}
// Reruns this program through callgrind, storing callgrind result files in the
// current directory.
// Returns \c true upon success, otherwise false.
bool QBenchmarkValgrindUtils::runCallgrindSubProcess(const QStringList &origAppArgs, int &exitCode)
{
const QString execFile(origAppArgs.at(0));
QStringList args;
args << QLatin1String("--tool=callgrind") << QLatin1String("--instr-atstart=yes")
<< QLatin1String("--quiet")
<< execFile << QLatin1String("-callgrindchild");
// pass on original arguments that make sense (e.g. avoid wasting time producing output
// that will be ignored anyway) ...
for (int i = 1; i < origAppArgs.size(); ++i) {
const QString arg(origAppArgs.at(i));
if (arg == QLatin1String("-callgrind"))
continue;
args << arg; // ok to pass on
}
QProcess process;
process.start(QLatin1String("valgrind"), args);
process.waitForStarted(-1);
QBenchmarkGlobalData::current->callgrindOutFileBase =
QBenchmarkValgrindUtils::outFileBase(process.pid());
const bool finishedOk = process.waitForFinished(-1);
exitCode = process.exitCode();
dumpOutput(process.readAllStandardOutput(), stdout);
dumpOutput(process.readAllStandardError(), stderr);
return finishedOk;
}
void QBenchmarkCallgrindMeasurer::start()
{
CALLGRIND_ZERO_STATS;
}
qint64 QBenchmarkCallgrindMeasurer::checkpoint()
{
CALLGRIND_DUMP_STATS;
const qint64 result = QBenchmarkValgrindUtils::extractLastResult();
return result;
}
qint64 QBenchmarkCallgrindMeasurer::stop()
{
return checkpoint();
}
bool QBenchmarkCallgrindMeasurer::isMeasurementAccepted(qint64 measurement)
{
Q_UNUSED(measurement);
return true;
}
int QBenchmarkCallgrindMeasurer::adjustIterationCount(int)
{
return 1;
}
int QBenchmarkCallgrindMeasurer::adjustMedianCount(int)
{
return 1;
}
bool QBenchmarkCallgrindMeasurer::needsWarmupIteration()
{
return true;
}
QTest::QBenchmarkMetric QBenchmarkCallgrindMeasurer::metricType()
{
return QTest::InstructionReads;
}
QT_END_NAMESPACE
#endif // QTESTLIB_USE_VALGRIND
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