1 /*
   2  * Copyright (c) 2015, 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 
  24 package compiler.jvmci.common;
  25 
  26 import jdk.vm.ci.code.CompilationRequest;
  27 import jdk.vm.ci.code.CompilationRequestResult;
  28 import jdk.vm.ci.hotspot.HotSpotVMEventListener;
  29 import jdk.vm.ci.services.JVMCIServiceLocator;
  30 import jdk.vm.ci.runtime.JVMCICompiler;
  31 import jdk.vm.ci.runtime.JVMCIRuntime;
  32 import jdk.vm.ci.runtime.JVMCICompilerFactory;
  33 
  34 /*
  35  * A stub classes to be able to use jvmci
  36  */
  37 public class JVMCIHelpers extends JVMCIServiceLocator {
  38 
  39     @Override
  40     public <S> S getProvider(Class<S> service) {
  41         if (service == JVMCICompilerFactory.class) {
  42             return service.cast(new EmptyCompilerFactory());
  43         }
  44         if (service == HotSpotVMEventListener.class) {
  45             return service.cast(new EmptyVMEventListener());
  46         }
  47         return null;
  48     }
  49 
  50     public static class EmptyVMEventListener implements HotSpotVMEventListener {
  51         // just empty, using default interface methods
  52     }
  53 
  54     public static class EmptyCompilationRequestResult implements CompilationRequestResult {
  55         @Override
  56         public Object getFailure() {
  57             return "no compiler configured";
  58         }
  59     }
  60     public static class EmptyHotspotCompiler implements JVMCICompiler {
  61 
  62         @Override
  63         public CompilationRequestResult compileMethod(CompilationRequest request) {
  64             // do nothing
  65             return new EmptyCompilationRequestResult();
  66         }
  67     }
  68 
  69     public static class EmptyCompilerFactory implements JVMCICompilerFactory {
  70 
  71         @Override
  72         public String getCompilerName() {
  73             return "EmptyCompiler";
  74         }
  75 
  76         @Override
  77         public JVMCICompiler createCompiler(JVMCIRuntime runtime) {
  78             return new EmptyHotspotCompiler();
  79         }
  80     }
  81 }