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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/jvmci/HotSpotOptionsLoader.java @ 21541:5e868236654f

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moved UnsafeAccess to com.oracle.jvmci.common (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Mon, 25 May 2015 22:17:10 +0200
parents c1e2fdb5fea3
children
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fe608a56e3f7 made HotSpotOptions processing faster by removing use of service loader in VM startup and only doing work for options specified on the command line
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.jvmci;
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24
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25 import java.util.*;
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26
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27 import com.oracle.graal.options.*;
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28 import com.oracle.jvmci.runtime.*;
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29
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30 /**
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31 * Helper class for separating loading of options from option initialization at runtime.
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32 */
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33 class HotSpotOptionsLoader {
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34 static final SortedMap<String, OptionDescriptor> options = new TreeMap<>();
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35
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36 /**
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37 * Initializes {@link #options} from {@link Options} services.
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38 */
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39 static {
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40 for (Options opts : Services.load(Options.class)) {
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41 for (OptionDescriptor desc : opts) {
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42 if (isHotSpotOption(desc)) {
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43 String name = desc.getName();
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44 OptionDescriptor existing = options.put(name, desc);
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45 assert existing == null : "Option named \"" + name + "\" has multiple definitions: " + existing.getLocation() + " and " + desc.getLocation();
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46 }
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47 }
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48 }
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49 }
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50
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51 /**
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52 * Determines if a given option is a HotSpot command line option.
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53 */
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54 private static boolean isHotSpotOption(OptionDescriptor desc) {
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55 return desc.getClass().getName().startsWith("com.oracle.graal");
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56 }
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57 }