Method javaArguments

launcher/minecraft/MinecraftInstance.cpp:388–448

}

QStringList MinecraftInstance::javaArguments()
{
    QStringList args;

    if (!m_authlibinjector_javaagent->isNull())
    {
        args.append(QString("-javaagent:%1").arg(*m_authlibinjector_javaagent));
    }

    // custom args go first. we want to override them if we have our own here.
    args.append(extraArguments());

    // OSX dock icon and name
#ifdef Q_OS_MAC
    args << "-Xdock:icon=icon.png";
    args << QString("-Xdock:name=\"%1\"").arg(windowTitle());
#endif
    auto traits_ = traits();
    // HACK: fix issues on macOS with 1.13 snapshots
    // NOTE: Oracle Java option. if there are alternate jvm implementations, this would be the place to customize this for them
#ifdef Q_OS_MAC
    if(traits_.contains("FirstThreadOnMacOS"))
    {
        args << QString("-XstartOnFirstThread");
    }
#endif

    // HACK: Stupid hack for Intel drivers. See: https://mojang.atlassian.net/browse/MCL-767
#ifdef Q_OS_WIN32
    args << QString("-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_"
                    "minecraft.exe.heapdump");
#endif

    int min = settings()->get("MinMemAlloc").toInt();
    int max = settings()->get("MaxMemAlloc").toInt();
    if(min < max)
    {
        args << QString("-Xms%1m").arg(min);
        args << QString("-Xmx%1m").arg(max);
    }
    else
    {
        args << QString("-Xms%1m").arg(max);
        args << QString("-Xmx%1m").arg(min);
    }

    // No PermGen in newer java.
    JavaVersion javaVersion = getJavaVersion();
    if(javaVersion.requiresPermGen())
    {
        auto permgen = settings()->get("PermGen").toInt();
        if (permgen != 64)
        {
            args << QString("-XX:PermSize=%1m").arg(permgen);
        }
    }

    args << "-Duser.language=en";