如何动态加载AttachProvider(attach.dll)

我正在使用jdk的tools.jar中的com.sun.tools.attach,它需要一个指定的 java.library.path env,指向启动时的attach.dll以正确设置提供程序,如 WindowsAttachProvider.由于某些原因,我需要动态加载捆绑的attach.dll之一.我试着用这样的东西：

public static void main(String[] args) throws Exception {
    Path bin = Paths.get(System.getProperty("user.dir"),"bin").toAbsolutePath();
    switch (System.getProperty("os.arch")) {
        case "amd64":
            bin = bin.resolve("win64");
            break;
        default:
            bin = bin.resolve("win32");
    }
    // Dynamic setting of java.library.path only seems not sufficient
    System.setProperty("java.library.path",System.getProperty("java.library.path") + File.pathSeparator + bin.toString());
    // So I try to manual loading attach.dll. This is not sufficient too.
    System.load(bin.resolve("attach.dll").toString());
    // I'm using com.sun.tools.attach in my app
    new myApp();
}

如果我用jdk(在normall jre中)运行它,它会向我报告：

java.util.ServiceConfigurationError: com.sun.tools.attach.spi.AttachProvider:
Provider sun.tools.attach.WindowsAttachProvider could not be instantiated:
java.lang.UnsatisfiedLinkError: no attach in java.library.path
Exception in thread "main" com.sun.tools.attach.AttachNotSupportedException:
no providers installed
    at com.sun.tools.attach.VirtualMachine.attach(...

如何安装附件提供程序而不指定-Djava.library.path在启动时指向attach.dll？

System.setProperty( "java.library.path","/path/to/libs" );

Field fieldSysPath = ClassLoader.class.getDeclaredField( "sys_paths" );
fieldSysPath.setAccessible( true );
fieldSysPath.set( null,null );