private void addThreadDump(List<String> cmdLine) {
        File logDir = new File(domainDir, "logs");
        File jvmLogFile = new File(logDir, "jvm.log");

        // bnevins :
        // warning these are the only order-dependent JVM options that I know about
        // Unlock... *must* come before the other two.

        cmdLine.add("-XX:+UnlockDiagnosticVMOptions");
        cmdLine.add("-XX:+LogVMOutput");
        cmdLine.add("-XX:LogFile=" + jvmLogFile.getPath());
    }