1 /*
2  * Copyright (C) 2017 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 package art;
18 
19 import java.util.Arrays;
20 
21 public class Test927 {
run()22   public static void run() throws Exception {
23     doTest();
24   }
25 
doTest()26   private static void doTest() {
27     int all1 = Runtime.getRuntime().availableProcessors();
28     int all2 = getAvailableProcessors();
29     if (all1 != all2) {
30       throw new RuntimeException("Available processors doesn't match: " + all1 + " vs " + all2);
31     }
32     System.out.println("availableProcessors OK");
33 
34     Object info[] = getTimerInfo();
35     System.out.println(Arrays.toString(info));
36 
37     // getTime checks.
38     // Note: there isn't really much to check independent from the implementation. So we check
39     //       a few details of the ART implementation. This may fail on other runtimes.
40     long time1 = getTime();
41     long time2 = getTime();
42 
43     // Under normal circumstances, time1 <= time2.
44     if (time2 < time1) {
45       throw new RuntimeException("Time unexpectedly decreased: " + time1 + " vs " + time2);
46     }
47 
48     long time3 = System.nanoTime();
49     long time4 = getTime();
50 
51     final long MINUTE = 60l * 1000 * 1000 * 1000;
52     if (time4 < time3 || (time4 - time3 > MINUTE)) {
53       throw new RuntimeException("Time unexpectedly divergent: " + time3 + " vs " + time4);
54     }
55 
56     System.out.println("Time OK");
57   }
58 
getAvailableProcessors()59   private static native int getAvailableProcessors();
getTimerInfo()60   private static native Object[] getTimerInfo();
getTime()61   private static native long getTime();
62 }
63