1 /* 2 * Copyright (c) 2016, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.graph; 24 25 import java.util.Objects; 26 27 import jdk.vm.ci.code.BytecodePosition; 28 import jdk.vm.ci.code.CodeUtil; 29 import jdk.vm.ci.meta.JavaConstant; 30 import jdk.vm.ci.meta.MetaUtil; 31 import jdk.vm.ci.meta.ResolvedJavaMethod; 32 33 public class NodeSourcePosition extends BytecodePosition { 34 35 /** 36 * The receiver of the method this frame refers to. 37 */ 38 private final JavaConstant receiver; 39 40 public NodeSourcePosition(JavaConstant receiver, NodeSourcePosition caller, ResolvedJavaMethod method, int bci) { 41 super(caller, method, bci); 42 this.receiver = receiver; 43 assert receiver == null || method.getDeclaringClass().isInstance(receiver); 44 } 45 46 @Override 47 public boolean equals(Object obj) { 48 if (obj == this) { 49 return true; 50 } 51 if (obj != null && getClass() == obj.getClass()) { 52 NodeSourcePosition that = (NodeSourcePosition) obj; 53 if (this.getBCI() == that.getBCI() && Objects.equals(this.getMethod(), that.getMethod()) && Objects.equals(this.getCaller(), that.getCaller()) && 54 Objects.equals(this.receiver, that.receiver)) { 55 return true; 56 } 57 } 58 return false; 59 } 60 61 public JavaConstant getReceiver() { 62 return receiver; 63 } 64 65 @Override 66 public NodeSourcePosition getCaller() { 67 return (NodeSourcePosition) super.getCaller(); 68 } 69 70 public NodeSourcePosition addCaller(JavaConstant newCallerReceiver, NodeSourcePosition link) { 71 if (getCaller() == null) { 72 assert newCallerReceiver == null || receiver == null : "replacing receiver"; 73 return new NodeSourcePosition(newCallerReceiver, link, getMethod(), getBCI()); 74 } else { 75 return new NodeSourcePosition(receiver, getCaller().addCaller(newCallerReceiver, link), getMethod(), getBCI()); 76 } 77 } 78 79 public NodeSourcePosition addCaller(NodeSourcePosition link) { 80 return addCaller(null, link); 81 } 82 83 @Override 84 public String toString() { 85 StringBuilder sb = new StringBuilder(100); 86 NodeSourcePosition pos = this; 87 while (pos != null) { 88 MetaUtil.appendLocation(sb.append("at "), pos.getMethod(), pos.getBCI()); 89 if (pos.receiver != null) { 90 sb.append("receiver=" + pos.receiver + " "); 91 } 92 pos = pos.getCaller(); 93 if (pos != null) { 94 sb.append(CodeUtil.NEW_LINE); 95 } 96 } 97 return sb.toString(); 98 } 99 }