source: trunk/src/testlib/qbenchmarkvalgrind.cpp@ 349

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#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 "3rdparty/callgrind_p.h"

// 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(QLatin1String("%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(QLatin1String("%1.(\\d+)")).arg(base);
    const QRegExp rx(pattern);
    foreach (QFileInfo fileInfo, fiList) {
        const int index = rx.indexIn(fileInfo.fileName());
        Q_ASSERT(index == 0);