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
20public class ChildClass {
21  // This method being synchronized means the SIGQUIT code in ART will call
22  // FindLocksAtDexPc (we check for the presence of try blocks),
23  // which triggered a DCHECK of an invariant.
24  public static synchronized void runTest() throws Exception {
25    Main m = Foo.mainObject;
26
27    SigQuit.doKill();
28
29    // Sleep some time to get the kill while executing this method.
30    Thread.sleep(2);
31
32    // The FindLocksAtDexPc method running with the verifier would fail when
33    // resolving this call, as the verifier didn't register Main from the field
34    // access above with the current class loader.
35    Main.staticMethod();
36    System.out.println("Done");
37  }
38
39  private final static class SigQuit {
40    private final static int sigquit;
41    private final static Method kill;
42    private final static int pid;
43
44    static {
45      int pidTemp = -1;
46      int sigquitTemp = -1;
47      Method killTemp = null;
48
49      try {
50        Class<?> osClass = Class.forName("android.system.Os");
51        Method getpid = osClass.getDeclaredMethod("getpid");
52        pidTemp = (Integer)getpid.invoke(null);
53
54        Class<?> osConstants = Class.forName("android.system.OsConstants");
55        Field sigquitField = osConstants.getDeclaredField("SIGQUIT");
56        sigquitTemp = (Integer)sigquitField.get(null);
57
58        killTemp = osClass.getDeclaredMethod("kill", int.class, int.class);
59      } catch (Exception e) {
60        throw new Error(e);
61      }
62
63      pid = pidTemp;
64      sigquit = sigquitTemp;
65      kill = killTemp;
66    }
67
68    public static void doKill() throws Exception {
69      kill.invoke(null, pid, sigquit);
70    }
71  }
72}
73