1/* 2 * Copyright (c) 1998, 2017, 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 26package com.sun.tools.jdi; 27 28import com.sun.jdi.AbsentInformationException; 29import com.sun.jdi.Location; 30import com.sun.jdi.Method; 31import com.sun.jdi.ReferenceType; 32import com.sun.jdi.VirtualMachine; 33 34public class LocationImpl extends MirrorImpl implements Location { 35 private final ReferenceTypeImpl declaringType; 36 private Method method; 37 private long methodRef; 38 private long codeIndex; 39 private LineInfo baseLineInfo = null; 40 private LineInfo otherLineInfo = null; 41 42 LocationImpl(VirtualMachine vm, Method method, long codeIndex) { 43 super(vm); 44 this.method = method; 45 this.codeIndex = method.isNative()? -1 : codeIndex; 46 this.declaringType = (ReferenceTypeImpl)method.declaringType(); 47 } 48 49 /* 50 * This constructor allows lazy creation of the method mirror. This 51 * can be a performance savings if the method mirror does not yet 52 * exist. 53 */ 54 LocationImpl(VirtualMachine vm, ReferenceTypeImpl declaringType, 55 long methodRef, long codeIndex) { 56 super(vm); 57 58 this.method = null; 59 this.codeIndex = codeIndex; 60 this.declaringType = declaringType; 61 this.methodRef = methodRef; 62 } 63 64 public boolean equals(Object obj) { 65 if ((obj != null) && (obj instanceof Location)) { 66 Location other = (Location)obj; 67 return (method().equals(other.method())) && 68 (codeIndex() == other.codeIndex()) && 69 super.equals(obj); 70 } else { 71 return false; 72 } 73 } 74 75 public int hashCode() { 76 /* 77 * TO DO: better hash code? 78 */ 79 return method().hashCode() + (int)codeIndex(); 80 } 81 82 public int compareTo(Location object) { 83 LocationImpl other = (LocationImpl)object; 84 int rc = method().compareTo(other.method()); 85 if (rc == 0) { 86 long diff = codeIndex() - other.codeIndex(); 87 if (diff < 0) 88 return -1; 89 else if (diff > 0) 90 return 1; 91 else 92 return 0; 93 } 94 return rc; 95 } 96 97 public ReferenceType declaringType() { 98 return declaringType; 99 } 100 101 public Method method() { 102 if (method == null) { 103 method = declaringType.getMethodMirror(methodRef); 104 if (method.isNative()) { 105 codeIndex = -1; 106 } 107 } 108 return method; 109 } 110 111 public long codeIndex() { 112 method(); // be sure information is up-to-date 113 return codeIndex; 114 } 115 116 LineInfo getBaseLineInfo(SDE.Stratum stratum) { 117 LineInfo lineInfo; 118 119 /* check if there is cached info to use */ 120 if (baseLineInfo != null) { 121 return baseLineInfo; 122 } 123 124 /* compute the line info */ 125 MethodImpl methodImpl = (MethodImpl)method(); 126 lineInfo = methodImpl.codeIndexToLineInfo(stratum, codeIndex()); 127 128 /* cache it */ 129 addBaseLineInfo(lineInfo); 130 131 return lineInfo; 132 } 133 134 LineInfo getLineInfo(SDE.Stratum stratum) { 135 LineInfo lineInfo; 136 137 /* base stratum is done slighly differently */ 138 if (stratum.isJava()) { 139 return getBaseLineInfo(stratum); 140 } 141 142 /* check if there is cached info to use */ 143 lineInfo = otherLineInfo; // copy because of concurrency 144 if (lineInfo != null && stratum.id().equals(lineInfo.liStratum())) { 145 return lineInfo; 146 } 147 148 int baseLineNumber = lineNumber(SDE.BASE_STRATUM_NAME); 149 SDE.LineStratum lineStratum = 150 stratum.lineStratum(declaringType, baseLineNumber); 151 152 if (lineStratum != null && lineStratum.lineNumber() != -1) { 153 lineInfo = new StratumLineInfo(stratum.id(), 154 lineStratum.lineNumber(), 155 lineStratum.sourceName(), 156 lineStratum.sourcePath()); 157 } else { 158 /* find best match */ 159 MethodImpl methodImpl = (MethodImpl)method(); 160 lineInfo = methodImpl.codeIndexToLineInfo(stratum, codeIndex()); 161 } 162 163 /* cache it */ 164 addStratumLineInfo(lineInfo); 165 166 return lineInfo; 167 } 168 169 void addStratumLineInfo(LineInfo lineInfo) { 170 otherLineInfo = lineInfo; 171 } 172 173 void addBaseLineInfo(LineInfo lineInfo) { 174 baseLineInfo = lineInfo; 175 } 176 177 public String sourceName() throws AbsentInformationException { 178 return sourceName(vm.getDefaultStratum()); 179 } 180 181 public String sourceName(String stratumID) 182 throws AbsentInformationException { 183 return sourceName(declaringType.stratum(stratumID)); 184 } 185 186 String sourceName(SDE.Stratum stratum) 187 throws AbsentInformationException { 188 return getLineInfo(stratum).liSourceName(); 189 } 190 191 public String sourcePath() throws AbsentInformationException { 192 return sourcePath(vm.getDefaultStratum()); 193 } 194 195 public String sourcePath(String stratumID) 196 throws AbsentInformationException { 197 return sourcePath(declaringType.stratum(stratumID)); 198 } 199 200 String sourcePath(SDE.Stratum stratum) 201 throws AbsentInformationException { 202 return getLineInfo(stratum).liSourcePath(); 203 } 204 205 public int lineNumber() { 206 return lineNumber(vm.getDefaultStratum()); 207 } 208 209 public int lineNumber(String stratumID) { 210 return lineNumber(declaringType.stratum(stratumID)); 211 } 212 213 int lineNumber(SDE.Stratum stratum) { 214 return getLineInfo(stratum).liLineNumber(); 215 } 216 217 public String toString() { 218 if (lineNumber() == -1) { 219 return method().toString() + "+" + codeIndex(); 220 } else { 221 return declaringType().name() + ":" + lineNumber(); 222 } 223 } 224} 225