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 17 import java.lang.reflect.Field; 18 import java.lang.reflect.Method; 19 20 public 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
