| // Copyright (c) 2018, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.debug; |
| |
| public class DoNotCrashOnAccessToThis { |
| private String[] array = new String[] { "asdf" }; |
| |
| public int length() { |
| return array.length; |
| } |
| |
| public void mightClobberThis(int i) { |
| // Make a local copy of the receiver so that we can let the receiver be clobbered in |
| // release mode. |
| String[] localArray = array; |
| // Keep receiver alive so that localArray is not what is clobbering the receiver register. |
| // Attempt to get an integer into the receiver register. |
| int index = length(); |
| String s = localArray[index + i]; |
| } |
| |
| public static void main(String[] args) { |
| DoNotCrashOnAccessToThis instance = new DoNotCrashOnAccessToThis(); |
| for (int i = 0; i < 100000; i++) { |
| instance.mightClobberThis(-1); |
| } |
| try { |
| instance.mightClobberThis(0); |
| } catch (ArrayIndexOutOfBoundsException e) { |
| System.out.println("Caught ArrayIndexOutOfBoundsException"); |
| } |
| |
| } |
| } |