1 /*
2  * Copyright (C) 2022 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 public class Main {
18   static Main empty;
19 
20   static class MyThread extends Thread {
run()21     public void run() {
22       // This will throw at `callMethodThatThrows` and trigger deoptimization checks which we used
23       // to crash on.
24       new Inner();
25     }
26   }
27 
28   public static class Inner {
29     // Have a <clinit> method invoke another <clinit> method to ensure we execute in the
30     // interpreter.
31     static {
Inner2()32       new Inner2();
33     }
34   }
35 
36   public static class Inner2 {
37     static {
Main.callMethodThatThrows()38       Main.callMethodThatThrows();
39     }
40   }
41 
main(String[] args)42   public static void main(String[] args) throws Exception {
43     System.loadLibrary(args[0]);
44     // Disables use of nterp.
45     Main.setAsyncExceptionsThrown();
46 
47     // Execute the test in a different thread, to ensure we still
48     // return a 0 exit status.
49     Thread t = new MyThread();
50     t.setUncaughtExceptionHandler((th, e) -> {
51       System.out.println("Caught exception");
52     });
53     t.start();
54     t.join();
55   }
56 
callMethodThatThrows()57   public static void callMethodThatThrows() {
58     // Ensures we get deoptimization requests.
59     Main.forceInterpreterOnThread();
60     throw new Error("");
61   }
62 
forceInterpreterOnThread()63   public static native void forceInterpreterOnThread();
setAsyncExceptionsThrown()64   public static native void setAsyncExceptionsThrown();
65 
66 }
67