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.code.CompilationRequestResult;
  27 import jdk.vm.ci.common.JVMCIError;
  28 import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option;
  29 import jdk.vm.ci.runtime.JVMCICompiler;
  30 import jdk.vm.ci.runtime.JVMCICompilerFactory;
  31 import jdk.vm.ci.runtime.JVMCIRuntime;
  32 import jdk.vm.ci.services.Services;
  33 
  34 final class HotSpotJVMCICompilerConfig {
  35 
  36     private static class DummyCompilerFactory implements JVMCICompilerFactory, JVMCICompiler {
  37 
  38         public CompilationRequestResult compileMethod(CompilationRequest request) {
  39             throw new JVMCIError("no JVMCI compiler selected");
  40         }
  41 
  42         public String getCompilerName() {
  43             return "<none>";
  44         }
  45 
  46         public JVMCICompiler createCompiler(JVMCIRuntime runtime) {
  47             return this;
  48         }
  49     }
  50 
  51     /**
  52      * Factory of the selected system compiler.
  53      */
  54     private static JVMCICompilerFactory compilerFactory;
  55 
  56     /**
  57      * Gets the selected system compiler factory.
  58      *
  59      * @return the selected system compiler factory
  60      */
  61     static JVMCICompilerFactory getCompilerFactory() {
  62         if (compilerFactory == null) {
  63             JVMCICompilerFactory factory = null;
  64             String compilerName = Option.Compiler.getString();
  65             if (compilerName != null) {
  66                 for (JVMCICompilerFactory f : Services.load(JVMCICompilerFactory.class)) {
  67                     if (f.getCompilerName().equals(compilerName)) {
  68                         factory = f;
  69                     }
  70                 }
  71                 if (factory == null) {
  72                     throw new JVMCIError("JVMCI compiler '%s' not found", compilerName);
  73                 }
  74             } else {
  75                 factory = new DummyCompilerFactory();
  76             }
  77             compilerFactory = factory;
  78         }
  79         return compilerFactory;
  80     }
  81 }