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
getProvider(Class<S> service)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
getFailure()56         public Object getFailure() {
57             return "no compiler configured";
58         }
59     }
60     public static class EmptyHotspotCompiler implements JVMCICompiler {
61 
62         @Override
compileMethod(CompilationRequest request)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
getCompilerName()72         public String getCompilerName() {
73             return "EmptyCompiler";
74         }
75 
76         @Override
createCompiler(JVMCIRuntime runtime)77         public JVMCICompiler createCompiler(JVMCIRuntime runtime) {
78             return new EmptyHotspotCompiler();
79         }
80     }
81 }
82