1 /* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.hotspot; 24 25 import jdk.vm.ci.code.CompilationRequest; 26 import jdk.vm.ci.common.JVMCIError; 27 import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option; 28 import jdk.vm.ci.runtime.JVMCICompiler; 29 import jdk.vm.ci.runtime.JVMCIRuntime; 30 import jdk.vm.ci.runtime.services.JVMCICompilerFactory; 31 import jdk.vm.ci.services.Services; 32 33 final class HotSpotJVMCICompilerConfig { 34 35 /** 36 * This factory allows JVMCI initialization to succeed but raises an error if the VM asks JVMCI 37 * to perform a compilation. This allows the reflective parts of the JVMCI API to be used 38 * without requiring a compiler implementation to be available. 39 */ 40 private static class DummyCompilerFactory extends JVMCICompilerFactory implements JVMCICompiler { 41 42 public HotSpotCompilationRequestResult compileMethod(CompilationRequest request) { 43 throw new JVMCIError("no JVMCI compiler selected"); 44 } 45 46 @Override 47 public String getCompilerName() { 48 return "<none>"; 49 } 50 51 @Override 52 public JVMCICompiler createCompiler(JVMCIRuntime runtime) { 53 return this; 54 } 55 } 56 57 /** 58 * Factory of the selected system compiler. 59 */ 60 private static JVMCICompilerFactory compilerFactory; 61 62 /** 63 * Gets the selected system compiler factory. 64 * 65 * @return the selected system compiler factory 66 */ 67 static JVMCICompilerFactory getCompilerFactory() { 68 if (compilerFactory == null) { 69 JVMCICompilerFactory factory = null; 70 String compilerName = Option.Compiler.getString(); 71 if (compilerName != null) { 72 for (JVMCICompilerFactory f : Services.load(JVMCICompilerFactory.class)) { 73 if (f.getCompilerName().equals(compilerName)) { 74 Services.exportJVMCITo(f.getClass()); 75 factory = f; 76 } 77 } 78 if (factory == null) { 79 throw new JVMCIError("JVMCI compiler '%s' not found", compilerName); 80 } 81 } else { 82 // Auto select a single available compiler 83 for (JVMCICompilerFactory f : Services.load(JVMCICompilerFactory.class)) { 84 if (factory == null) { 85 Services.exportJVMCITo(f.getClass()); 86 factory = f; 87 } else { 88 // Multiple factories seen - cancel auto selection 89 factory = null; 90 break; 91 } 92 } 93 if (factory == null) { 94 factory = new DummyCompilerFactory(); 95 } 96 } 97 factory.onSelection(); 98 compilerFactory = factory; 99 } 100 return compilerFactory; 101 } 102 }