1 /* 2 * Copyright (C) 2014 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 // Regression test for 22460222, the sub class. 18 // The field gaps order was wrong. If there were two gaps of different sizes, 19 // and the larger one was needed, it wouldn't be found. 20 21 import java.lang.reflect.Field; 22 import java.lang.reflect.Method; 23 24 class GapOrder extends GapOrderBase { 25 // The base class is 9 bytes. The entire class should be packed as: 26 // 27 // 00: oooo oooo 28 // 08: b-ss rrrr 29 // 16: rrrr iiii 30 // 24: dddd dddd 31 // 32 // The problem was, the packer wasn't finding the gap where iiii should go, 33 // because the gap where ss goes was given priority. Instead it packed as: 34 // 00: oooo oooo 35 // 08: b--- rrrr 36 // 16: rrrr ---- 37 // 24: dddd dddd 38 // 32: iiii ss 39 public Object r1; 40 public Object r2; 41 public double d; 42 public int i; 43 public short s; 44 45 static private void CheckField(String fieldName, int expected) { 46 Field field = null; 47 try { 48 field = GapOrder.class.getField(fieldName); 49 } catch (ReflectiveOperationException e) { 50 System.out.println(fieldName + " not found in GapOrder."); 51 return; 52 } 53 54 int actual = -1; 55 try { 56 Method getOffset = Field.class.getMethod("getOffset"); 57 actual = (Integer)getOffset.invoke(field); 58 } catch (ReflectiveOperationException e) { 59 System.out.println("Unable to get field offset for " + fieldName + ":" + e); 60 return; 61 } 62 63 if (actual != expected) { 64 System.out.println( 65 String.format("GapOrder.%s has offset %d, but expected %d", 66 fieldName, actual, expected)); 67 } 68 } 69 70 static public void Check() { 71 CheckField("r1", 12); 72 CheckField("r2", 16); 73 CheckField("d", 24); 74 CheckField("i", 20); 75 CheckField("s", 10); 76 } 77 } 78 79
