1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 import java.lang.reflect.Method;
18 
19 public class Main {
main(String[] args)20   public static void main(String[] args) throws Exception {
21     boolean hasImage = hasImage();
22     String instructionSet = VMRuntime.getCurrentInstructionSet();
23     boolean isBootClassPathOnDisk = VMRuntime.isBootClassPathOnDisk(instructionSet);
24     System.out.println(
25         "Has image is " + hasImage + ", is image dex2oat enabled is "
26         + isImageDex2OatEnabled() + ", is BOOTCLASSPATH on disk is "
27         + isBootClassPathOnDisk + ".");
28 
29     if (hasImage && !isImageDex2OatEnabled()) {
30       throw new Error("Image with dex2oat disabled runs with an oat file");
31     } else if (!hasImage && isImageDex2OatEnabled()) {
32       throw new Error("Image with dex2oat enabled runs without an oat file");
33     }
34     if (hasImage && !isBootClassPathOnDisk) {
35       throw new Error("Image with dex2oat disabled runs with an image file");
36     } else if (!hasImage && isBootClassPathOnDisk) {
37       throw new Error("Image with dex2oat enabled runs without an image file");
38     }
39   }
40 
41   static {
42     System.loadLibrary("arttest");
43   }
44 
hasImage()45   private native static boolean hasImage();
46 
isImageDex2OatEnabled()47   private native static boolean isImageDex2OatEnabled();
48 
49   private static class VMRuntime {
50     private static final Method getCurrentInstructionSetMethod;
51     private static final Method isBootClassPathOnDiskMethod;
52     static {
53         try {
54             Class c = Class.forName("dalvik.system.VMRuntime");
55             getCurrentInstructionSetMethod = c.getDeclaredMethod("getCurrentInstructionSet");
56             isBootClassPathOnDiskMethod = c.getDeclaredMethod("isBootClassPathOnDisk",
57                                                               String.class);
58         } catch (Exception e) {
59             throw new RuntimeException(e);
60         }
61     }
62 
getCurrentInstructionSet()63     public static String getCurrentInstructionSet() throws Exception {
64       return (String) getCurrentInstructionSetMethod.invoke(null);
65     }
isBootClassPathOnDisk(String instructionSet)66     public static boolean isBootClassPathOnDisk(String instructionSet) throws Exception {
67       return (boolean) isBootClassPathOnDiskMethod.invoke(null, instructionSet);
68     }
69   }
70 }
71