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1 /*
2  * Copyright (C) 2021 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 interface Itf {
interfaceMethod()18   public String interfaceMethod();
19 }
20 
21 public class Main implements Itf {
22 
main(String[] args)23   public static void main(String[] args) throws Exception {
24     System.loadLibrary(args[0]);
25     ensureJitCompiled(Main.class, "$noinline$invoke");
26     String result = $noinline$invoke(new Main());
27     if (!"Main".equals(result)) {
28       throw new Error("Expected Main, got " + result);
29     }
30 
31     // Load SubItf dynamically, to avoid prior verification of this method to load it.
32     Class<?> cls = Class.forName("SubItf");
33     Itf itf = (Itf) cls.newInstance();
34 
35     result = $noinline$invoke(itf);
36     if (!"SubItf".equals(result)) {
37       throw new Error("Expected SubItf, got " + result);
38     }
39 
40   }
41 
$noinline$invoke(Itf itf)42   public static String $noinline$invoke(Itf itf) {
43     return itf.interfaceMethod();
44   }
45 
interfaceMethod()46   public String interfaceMethod() {
47     return "Main";
48   }
49 
ensureJitCompiled(Class<?> cls, String methodName)50   public static native void ensureJitCompiled(Class<?> cls, String methodName);
51 }
52 
53 class SubItf implements Itf {
interfaceMethod()54   public String interfaceMethod() {
55     return "SubItf";
56   }
57 }
58