001/*
002 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package jdk.internal.jvmci.hotspot;
024
025import java.util.*;
026
027import jdk.internal.jvmci.options.*;
028
029//JaCoCo Exclude
030
031/**
032 * Sets JVMCI options from the HotSpot command line. Such options are distinguished by the
033 * {@link #JVMCI_OPTION_PREFIX} prefix.
034 */
035public class HotSpotOptions {
036
037    private static final String JVMCI_OPTION_PREFIX = "-G:";
038
039    /**
040     * Called from VM.
041     */
042    static void printFlags() {
043        SortedMap<String, OptionDescriptor> options = new TreeMap<>();
044
045        for (Options opts : ServiceLoader.load(Options.class, HotSpotOptions.class.getClassLoader())) {
046            for (OptionDescriptor desc : opts) {
047                String name = desc.getName();
048                OptionDescriptor existing = options.put(name, desc);
049                assert existing == null : "Option named \"" + name + "\" has multiple definitions: " + existing.getLocation() + " and " + desc.getLocation();
050            }
051        }
052
053        OptionUtils.printFlags(options, JVMCI_OPTION_PREFIX);
054    }
055}