1 /* 2 * Copyright (C) 2015 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.io.BufferedReader; 18 import java.io.FileReader; 19 import java.io.InputStreamReader; 20 import java.util.Arrays; 21 import java.util.Comparator; 22 23 public class Main extends Base implements Comparator<Main> { 24 // Whether to test local unwinding. 25 private static boolean testLocal; 26 27 // Unwinding another process, modelling debuggerd. 28 private static boolean testRemote; 29 30 // We fork ourself to create the secondary process for remote unwinding. 31 private static boolean secondary; 32 main(String[] args)33 public static void main(String[] args) throws Exception { 34 System.out.println("args: " + String.join(" ", Arrays.copyOfRange(args, 1, args.length))); 35 36 System.loadLibrary(args[0]); 37 for (int i = 1; i < args.length; i++) { 38 if (args[i].equals("--test-local")) { 39 testLocal = true; 40 } else if (args[i].equals("--test-remote")) { 41 testRemote = true; 42 } else if (args[i].equals("--secondary")) { 43 secondary = true; 44 } else { 45 System.out.println("Unknown argument: " + args[i]); 46 System.exit(1); 47 } 48 } 49 50 // Call test() via base class to test unwinding through multidex. 51 new Main().$noinline$runTest(); 52 } 53 test()54 public void test() { 55 // Call unwind() via Arrays.binarySearch to test unwinding through framework. 56 Main[] array = { this, this, this }; 57 Arrays.binarySearch(array, 0, 3, this /* value */, this /* comparator */); 58 } 59 compare(Main lhs, Main rhs)60 public int compare(Main lhs, Main rhs) { 61 unwind(); 62 // Returning "equal" ensures that we terminate search 63 // after first item and thus call unwind() only once. 64 return 0; 65 } 66 unwind()67 public void unwind() { 68 if (secondary) { 69 sigstop(); // This is helper child process. Stop and wait for unwinding. 70 return; // Don't run the tests again in the secondary helper process. 71 } 72 73 if (testLocal) { 74 System.out.println(unwindInProcess() ? "PASS" : "FAIL"); 75 } 76 77 if (testRemote) { 78 // Start a secondary helper process. It will stop itself when it is ready. 79 int pid = startSecondaryProcess(); 80 // Wait for the secondary process to stop and then unwind it remotely. 81 System.out.println(unwindOtherProcess(pid) ? "PASS" : "FAIL"); 82 } 83 } 84 startSecondaryProcess()85 public static native int startSecondaryProcess(); sigstop()86 public static native boolean sigstop(); unwindInProcess()87 public static native boolean unwindInProcess(); unwindOtherProcess(int pid)88 public static native boolean unwindOtherProcess(int pid); 89 } 90