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annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig.java @ 23785:5cf445d2acf6 jvmci-0.22

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Exported elements referring to inaccessible types in jdk.vm.ci (JDK-8167180)
author Doug Simon <doug.simon@oracle.com>
date Tue, 11 Oct 2016 22:13:23 +0200
parents 5595ab8ba8bd
children 42cc0c2dd4a7
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1 /*
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2 * Copyright (c) 2015, 2016, 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 jdk.vm.ci.hotspot;
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24
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25 import jdk.vm.ci.code.CompilationRequest;
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26 import jdk.vm.ci.code.CompilationRequestResult;
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27 import jdk.vm.ci.common.JVMCIError;
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28 import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option;
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29 import jdk.vm.ci.runtime.JVMCICompiler;
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30 import jdk.vm.ci.runtime.JVMCICompilerFactory;
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31 import jdk.vm.ci.runtime.JVMCIRuntime;
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32 import jdk.vm.ci.services.JVMCIServiceLocator;
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33 import jdk.vm.ci.services.JVMCIPermission;
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34
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35 final class HotSpotJVMCICompilerConfig {
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36
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37 /**
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38 * This factory allows JVMCI initialization to succeed but raises an error if the VM asks JVMCI
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39 * to perform a compilation. This allows the reflective parts of the JVMCI API to be used
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40 * without requiring a compiler implementation to be available.
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41 */
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42 private static class DummyCompilerFactory implements JVMCICompilerFactory, JVMCICompiler {
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43
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44 public CompilationRequestResult compileMethod(CompilationRequest request) {
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45 throw new JVMCIError("no JVMCI compiler selected");
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46 }
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47
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48 @Override
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49 public String getCompilerName() {
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50 return "<none>";
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51 }
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52
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53 @Override
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54 public JVMCICompiler createCompiler(JVMCIRuntime runtime) {
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55 return this;
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56 }
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57 }
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58
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59 /**
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60 * Factory of the selected system compiler.
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61 */
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62 private static JVMCICompilerFactory compilerFactory;
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63
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64 /**
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65 * Gets the selected system compiler factory.
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66 *
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67 * @return the selected system compiler factory
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68 * @throws SecurityException if a security manager is present and it denies
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69 * {@link JVMCIPermission} for any {@link JVMCIServiceLocator} loaded by this method
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70 */
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71 static JVMCICompilerFactory getCompilerFactory() {
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72 if (compilerFactory == null) {
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73 JVMCICompilerFactory factory = null;
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74 String compilerName = Option.Compiler.getString();
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75 if (compilerName != null) {
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76 for (JVMCICompilerFactory f : JVMCIServiceLocator.getProviders(JVMCICompilerFactory.class)) {
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77 if (f.getCompilerName().equals(compilerName)) {
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78 factory = f;
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79 }
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80 }
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81 if (factory == null) {
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82 throw new JVMCIError("JVMCI compiler '%s' not found", compilerName);
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83 }
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84 } else {
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85 // Auto select a single available compiler
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86 for (JVMCICompilerFactory f : JVMCIServiceLocator.getProviders(JVMCICompilerFactory.class)) {
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87 if (factory == null) {
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88 factory = f;
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89 } else {
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90 // Multiple factories seen - cancel auto selection
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91 factory = null;
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92 break;
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93 }
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94 }
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95 if (factory == null) {
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96 factory = new DummyCompilerFactory();
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97 }
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98 }
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99 factory.onSelection();
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100 compilerFactory = factory;
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101 }
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102 return compilerFactory;
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103 }
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104 }