1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5  * in compliance with the License. You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software distributed under the License
10  * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11  * or implied. See the License for the specific language governing permissions and limitations under
12  * the License.
13  */
14 
15 package art;
16 
17 import java.util.concurrent.CountDownLatch;
18 import java.util.concurrent.TimeUnit;
19 
20 /**
21  * An entrypoint for the CTS JVMTI agent to signal to the Java side that it has attached.
22  */
23 public class CtsMain {
24 
25     private static CountDownLatch sStartWaiter = new CountDownLatch(1);
26 
27     /**
28      * This method will be called by the agent to inform the test that JNI methods are bound. The
29      * counterpart is waitFor.
30      */
31     @SuppressWarnings("unused")
startup()32     private static void startup() {
33         sStartWaiter.countDown();
34     }
35 
waitFor()36     public static void waitFor() {
37         try {
38             if (!sStartWaiter.await(15, TimeUnit.SECONDS)) {
39                 throw new RuntimeException("Timed out waiting for the agent");
40             }
41         } catch (InterruptedException e) {
42             throw new RuntimeException("Got interrupted waiting for agent.");
43         }
44     }
45 }
46