| /* |
| * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package jdk.vm.ci.hotspot; |
| |
| import jdk.vm.ci.code.CompilationRequest; |
| import jdk.vm.ci.common.JVMCIError; |
| import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option; |
| import jdk.vm.ci.runtime.JVMCICompiler; |
| import jdk.vm.ci.runtime.JVMCICompilerFactory; |
| import jdk.vm.ci.runtime.JVMCIRuntime; |
| import jdk.vm.ci.services.JVMCIServiceLocator; |
| import jdk.vm.ci.services.JVMCIPermission; |
| import jdk.vm.ci.services.Services; |
| |
| final class HotSpotJVMCICompilerConfig { |
| |
| /** |
| * This factory allows JVMCI initialization to succeed but raises an error if the VM asks JVMCI |
| * to perform a compilation. This allows the reflective parts of the JVMCI API to be used |
| * without requiring a compiler implementation to be available. |
| */ |
| private static class DummyCompilerFactory implements JVMCICompilerFactory, JVMCICompiler { |
| |
| public HotSpotCompilationRequestResult compileMethod(CompilationRequest request) { |
| throw new JVMCIError("no JVMCI compiler selected"); |
| } |
| |
| @Override |
| public String getCompilerName() { |
| return "<none>"; |
| } |
| |
| @Override |
| public JVMCICompiler createCompiler(JVMCIRuntime runtime) { |
| return this; |
| } |
| } |
| |
| /** |
| * Factory of the selected system compiler. |
| */ |
| private static JVMCICompilerFactory compilerFactory; |
| |
| /** |
| * Gets the selected system compiler factory. |
| * |
| * @return the selected system compiler factory |
| * @throws SecurityException if a security manager is present and it denies |
| * {@link JVMCIPermission} for any {@link JVMCIServiceLocator} loaded by this method |
| */ |
| static JVMCICompilerFactory getCompilerFactory() { |
| if (compilerFactory == null) { |
| JVMCICompilerFactory factory = null; |
| String compilerName = Option.Compiler.getString(); |
| if (compilerName != null) { |
| for (JVMCICompilerFactory f : JVMCIServiceLocator.getProviders(JVMCICompilerFactory.class)) { |
| if (f.getCompilerName().equals(compilerName)) { |
| factory = f; |
| } |
| } |
| if (factory == null) { |
| throw new JVMCIError("JVMCI compiler '%s' not found", compilerName); |
| } |
| } else { |
| // Auto select a single available compiler |
| for (JVMCICompilerFactory f : JVMCIServiceLocator.getProviders(JVMCICompilerFactory.class)) { |
| if (factory == null) { |
| Services.exportJVMCITo(f.getClass()); |
| factory = f; |
| } else { |
| // Multiple factories seen - cancel auto selection |
| factory = null; |
| break; |
| } |
| } |
| if (factory == null) { |
| factory = new DummyCompilerFactory(); |
| } |
| } |
| factory.onSelection(); |
| compilerFactory = factory; |
| } |
| return compilerFactory; |
| } |
| } |