diff -r 000000000000 -r 1918ee327afb src/testlib/qbenchmarkvalgrind.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/testlib/qbenchmarkvalgrind.cpp Mon Jan 11 14:00:40 2010 +0000 @@ -0,0 +1,278 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtTest module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "QtTest/private/qbenchmark_p.h" + +#ifdef QTESTLIB_USE_VALGRIND + +#include "QtTest/private/qbenchmarkvalgrind_p.h" +#include +#include +#include +#include +#include +#include "3rdparty/callgrind_p.h" + +QT_BEGIN_NAMESPACE + +// Returns true iff a sufficiently recent valgrind is available. +bool QBenchmarkValgrindUtils::haveValgrind() +{ +#ifdef NVALGRIND + return false; +#else + QProcess process; + QStringList args; + args << QLatin1String("--version"); + process.start(QLatin1String("valgrind"), args); + if (!process.waitForFinished(-1)) + return false; + const QByteArray out = process.readAllStandardOutput(); + const QRegExp rx(QLatin1String("^valgrind-([0-9]).([0-9]).[0-9]")); + if (rx.indexIn(QLatin1String(out.data())) == -1) + return false; + bool ok; + const int major = rx.cap(1).toInt(&ok); + if (!ok) + return false; + const int minor = rx.cap(2).toInt(&ok); + if (!ok) + return false; +// return (major > 3 || (major == 3 && minor >= 3)); // v >= 3.3 for --callgrind-out-file option + Q_UNUSED(major); + Q_UNUSED(minor); + return true; // skip version restriction for now +#endif +} + +// Reruns this program through callgrind. +// Returns 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; + const QRegExp rxValue(QLatin1String("^summary: (\\d+)")); + while (!file.atEnd()) { + const QString line(QLatin1String(file.readLine())); + if (rxValue.indexIn(line) != -1) { + Q_ASSERT(rxValue.numCaptures() == 1); + bool ok; + val = rxValue.cap(1).toLongLong(&ok); + Q_ASSERT(ok); + valSeen = true; + break; + } + } + Q_ASSERT(valSeen); + 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); + const QRegExp rx(pattern); + foreach (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 (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 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"); + +#if (defined Q_WS_QWS) + // While running the child process, we aren't processing events, and hence aren't + // acting as the QWS server. Therefore it's necessary to tell the child to act + // as its own server instead of connecting to us. + args << QLatin1String("-qws"); +#endif + + // 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; +} + +QString QBenchmarkCallgrindMeasurer::unitText() +{ + return QLatin1String("instr. loads"); +} + +QString QBenchmarkCallgrindMeasurer::metricText() +{ + return QLatin1String("callgrind"); +} + +QT_END_NAMESPACE + +#endif // QTESTLIB_USE_VALGRIND