1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package openjdk.jcov.filter.simplemethods; 26 27 import org.objectweb.asm.tree.ClassNode; 28 import org.objectweb.asm.tree.MethodNode; 29 30 import java.util.function.BiPredicate; 31 32 import static org.objectweb.asm.Opcodes.RETURN; 33 34 public class Getters implements BiPredicate<ClassNode, MethodNode> { 35 /** 36 * Identifies simple getters. A simple getter is a method obtaining a value with a "simple" code and returning it. 37 * @see Utils#isSimpleInstruction(int) 38 */ 39 @Override 40 public boolean test(ClassNode clazz, MethodNode m) { 41 int index = 0; 42 int opCode = -1; 43 //skip all instructions allowed to get values 44 for(; index < m.instructions.size(); index++) { 45 opCode = m.instructions.get(index).getOpcode(); 46 if(opCode >=0) { 47 if (!Utils.isSimpleInstruction(opCode)) { 48 break; 49 } 50 } 51 } 52 //that should be a return instruction, but returning a value 53 return Utils.isReturnInstruction(opCode) && opCode != RETURN; 54 } 55 }