Mercurial > hg > graal-jvmci-8
annotate jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig.java @ 23996:11f0412408cd
8173912: [JVMCI] fix memory overhead of JVMCI
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 03 Feb 2017 21:08:05 +0100 |
parents | 5cf445d2acf6 |
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 } |