QBenchmarkValgrindUtils Class Reference

#include <qbenchmarkvalgrind_p.h>

Static Public Functions
static void	cleanup ()
static qint64	extractLastResult ()
static qint64	extractResult (const QString &fileName)
static QString	getNewestFileName ()
static bool	haveValgrind ()
static QString	outFileBase (qint64 pid=-1)
static bool	rerunThroughCallgrind (const QStringList &origAppArgs, int &exitCode)
static bool	runCallgrindSubProcess (const QStringList &origAppArgs, int &exitCode)

Detailed Description

Definition at line 65 of file qbenchmarkvalgrind_p.h.

Functions

cleanup()

void QBenchmarkValgrindUtils::cleanup ( )

static

Definition at line 165 of file qbenchmarkvalgrind.cpp.

Referenced by QTest::qExec().

{
    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);
    }
}

extractLastResult()

qint64 QBenchmarkValgrindUtils::extractLastResult ( )

static

Definition at line 160 of file qbenchmarkvalgrind.cpp.

Referenced by QBenchmarkCallgrindMeasurer::checkpoint().

{
    return extractResult(getNewestFileName());
}

extractResult()

qint64 QBenchmarkValgrindUtils::extractResult ( const QString &  fileName )

static

Definition at line 104 of file qbenchmarkvalgrind.cpp.

Referenced by extractLastResult().

{
    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.captureCount() == 1);
            bool ok;
            val = rxValue.cap(1).toLongLong(&ok);
            Q_ASSERT(ok);
            valSeen = true;
            break;
        }
    }
    Q_ASSERT(valSeen);
    return val;
}

getNewestFileName()

QString QBenchmarkValgrindUtils::getNewestFileName ( )

static

Definition at line 130 of file qbenchmarkvalgrind.cpp.

Referenced by extractLastResult().

{
    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();
}

haveValgrind()

bool QBenchmarkValgrindUtils::haveValgrind ( )

static

Definition at line 57 of file qbenchmarkvalgrind.cpp.

Referenced by QTest::qtest_qParseArgs().

{
#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
}

outFileBase()

QString QBenchmarkValgrindUtils::outFileBase ( qint64  pid = -1 )

static

Definition at line 181 of file qbenchmarkvalgrind.cpp.

Referenced by QTest::qtest_qParseArgs(), and runCallgrindSubProcess().

{
    return QString::fromLatin1("callgrind.out.%1").arg(
        pid != -1 ? pid : QCoreApplication::applicationPid());
}

rerunThroughCallgrind()

bool QBenchmarkValgrindUtils::rerunThroughCallgrind ( const QStringList &  origAppArgs, int &  exitCode  )

static

Definition at line 88 of file qbenchmarkvalgrind.cpp.

Referenced by QTest::qExec().

{
    if (!QBenchmarkValgrindUtils::runCallgrindSubProcess(origAppArgs, exitCode)) {
        qWarning("failed to run callgrind subprocess");
        return false;
    }
    return true;
}

runCallgrindSubProcess()

bool QBenchmarkValgrindUtils::runCallgrindSubProcess ( const QStringList &  origAppArgs, int &  exitCode  )

static

Definition at line 190 of file qbenchmarkvalgrind.cpp.

Referenced by rerunThroughCallgrind().

{
    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;
}

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The documentation for this class was generated from the following files:

• /src/testlib/qbenchmarkvalgrind_p.h
• /src/testlib/qbenchmarkvalgrind.cpp