1/*
2 * Copyright (C) 2018 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
17import java.lang.reflect.Field;
18import java.lang.reflect.Method;
19
20class NotLoaded {
21  public void foo() {}
22}
23
24public class Main {
25  public static void main(String[] args) throws Exception {
26    runTest(null);
27  }
28
29  // This method being synchronized means the SIGQUIT code in ART will call
30  // FindLocksAtDexPc (we check for the presence of try blocks and monitor-enter),
31  // which triggered a DCHECK of an invariant.
32  public static synchronized void runTest(Object m) throws Exception {
33    if (m != null) {
34      // We used to crash while trying to resolve NotLoaded and beint interrupted
35      // by the SIGQUIT.
36      if (m instanceof NotLoaded) {
37        ((NotLoaded)m).foo();
38      }
39    }
40    SigQuit.doKill();
41    // Sleep some time to get the kill while executing this method.
42    Thread.sleep(2);
43    System.out.println("Done");
44  }
45
46  private final static class SigQuit {
47    private final static int sigquit;
48    private final static Method kill;
49    private final static int pid;
50
51    static {
52      int pidTemp = -1;
53      int sigquitTemp = -1;
54      Method killTemp = null;
55
56      try {
57        Class<?> osClass = Class.forName("android.system.Os");
58        Method getpid = osClass.getDeclaredMethod("getpid");
59        pidTemp = (Integer)getpid.invoke(null);
60
61        Class<?> osConstants = Class.forName("android.system.OsConstants");
62        Field sigquitField = osConstants.getDeclaredField("SIGQUIT");
63        sigquitTemp = (Integer)sigquitField.get(null);
64
65        killTemp = osClass.getDeclaredMethod("kill", int.class, int.class);
66      } catch (Exception e) {
67        throw new Error(e);
68      }
69
70      pid = pidTemp;
71      sigquit = sigquitTemp;
72      kill = killTemp;
73    }
74
75    public static void doKill() throws Exception {
76      kill.invoke(null, pid, sigquit);
77    }
78  }
79}
80