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annotate graal/com.oracle.graal.api.runtime/src/com/oracle/graal/api/runtime/Graal.java @ 21538:c1e2fdb5fea3

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removed more dependencies from JVMCI classes to non-JVMCI classes (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Mon, 25 May 2015 17:20:39 +0200
parents e37d1fe9f332
children b1530a6cce8c
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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1 /*
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2 * Copyright (c) 2012, 2015, 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
8d7d009a54d8 Introduction of com.oracle.graal.api project.
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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
8d7d009a54d8 Introduction of com.oracle.graal.api project.
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
8d7d009a54d8 Introduction of com.oracle.graal.api project.
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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 *
8d7d009a54d8 Introduction of com.oracle.graal.api project.
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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
8d7d009a54d8 Introduction of com.oracle.graal.api project.
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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.api.runtime;
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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.jvmci.runtime.*;
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28
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29 import sun.reflect.*;
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30
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31 /**
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32 * Access point for {@linkplain #getRuntime() retrieving} the single {@link GraalRuntime} instance.
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33 */
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34 public class Graal {
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35
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36 private static final GraalRuntime runtime = initializeRuntime();
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37
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38 private static GraalRuntime initializeRuntime() {
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39 GraalRuntime rt = null;
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40 for (GraalRuntimeFactory factory : Services.load(GraalRuntimeFactory.class)) {
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41 assert rt == null : String.format("Multiple %s implementations found: %s, %s", GraalRuntime.class.getName(), rt.getClass().getName(), factory.getRuntime().getClass().getName());
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42 rt = factory.getRuntime();
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43 }
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44 if (rt != null) {
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45 return rt;
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46 }
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47 return new InvalidGraalRuntime();
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48 }
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49
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50 /**
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51 * Gets the singleton {@link GraalRuntime} instance available to the application.
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52 */
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53 public static GraalRuntime getRuntime() {
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54 return runtime;
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55 }
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56
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57 /**
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58 * Gets a capability provided by the {@link GraalRuntime} instance available to the application.
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59 *
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60 * @throws UnsupportedOperationException if the capability is not available
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61 */
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62 @CallerSensitive
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63 public static <T> T getRequiredCapability(Class<T> clazz) {
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64 T t = getRuntime().getCapability(clazz);
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65 if (t == null) {
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66 String javaHome = System.getProperty("java.home");
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67 String vmName = System.getProperty("java.vm.name");
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68 Formatter errorMessage = new Formatter();
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69 if (runtime.getClass() == InvalidGraalRuntime.class) {
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70 errorMessage.format("The VM does not support the Graal API.%n");
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71 } else {
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72 errorMessage.format("The VM does not expose required Graal capability %s.%n", clazz.getName());
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73 }
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74 errorMessage.format("Currently used Java home directory is %s.%n", javaHome);
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75 errorMessage.format("Currently used VM configuration is: %s", vmName);
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76 throw new UnsupportedOperationException(errorMessage.toString());
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77 }
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78 return t;
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79 }
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80
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81 private static final class InvalidGraalRuntime implements GraalRuntime {
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82
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83 @Override
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84 public String getName() {
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85 return "";
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86 }
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87
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88 @Override
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89 public <T> T getCapability(Class<T> clazz) {
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90 return null;
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91 }
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92 }
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93 }