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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2004, 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 | |||
| 26 | package com.sun.tools.jdi; | ||
| 27 | |||
| 28 | import com.sun.jdi.*; | ||
| 29 | |||
| 30 | import java.util.*; | ||
| 31 | |||
| 32 | public class LocationImpl extends MirrorImpl implements Location { | ||
| 33 | private final ReferenceTypeImpl declaringType; | ||
| 34 | private Method method; | ||
| 35 | private long methodRef; | ||
| 36 | private long codeIndex; | ||
| 37 | private LineInfo baseLineInfo = null; | ||
| 38 | private LineInfo otherLineInfo = null; | ||
| 39 | |||
| 40 | LocationImpl(VirtualMachine vm, | ||
| 41 | Method method, long codeIndex) { | ||
| 42 | super(vm); | ||
| 43 | |||
| 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, | ||
| 127 | codeIndex()); | ||
| 128 | |||
| 129 | /* cache it */ | ||
| 130 | addBaseLineInfo(lineInfo); | ||
| 131 | |||
| 132 | return lineInfo; | ||
| 133 | } | ||
| 134 | |||
| 135 | LineInfo getLineInfo(SDE.Stratum stratum) { | ||
| 136 | LineInfo lineInfo; | ||
| 137 | |||
| 138 | /* base stratum is done slighly differently */ | ||
| 139 | if (stratum.isJava()) { | ||
| 140 | return getBaseLineInfo(stratum); | ||
| 141 | } | ||
| 142 | |||
| 143 | /* check if there is cached info to use */ | ||
| 144 | lineInfo = otherLineInfo; // copy because of concurrency | ||
| 145 | if (lineInfo != null && | ||
| 146 | stratum.id().equals(lineInfo.liStratum())) { | ||
| 147 | return lineInfo; | ||
| 148 | } | ||
| 149 | |||
| 150 | int baseLineNumber = lineNumber(SDE.BASE_STRATUM_NAME); | ||
| 151 | SDE.LineStratum lineStratum = | ||
| 152 | stratum.lineStratum(declaringType, baseLineNumber); | ||
| 153 | |||
| 154 | if (lineStratum != null && lineStratum.lineNumber() != -1) { | ||
| 155 | lineInfo = new StratumLineInfo(stratum.id(), | ||
| 156 | lineStratum.lineNumber(), | ||
| 157 | lineStratum.sourceName(), | ||
| 158 | lineStratum.sourcePath()); | ||
| 159 | } else { | ||
| 160 | /* find best match */ | ||
| 161 | MethodImpl methodImpl = (MethodImpl)method(); | ||
| 162 | lineInfo = methodImpl.codeIndexToLineInfo(stratum, | ||
| 163 | codeIndex()); | ||
| 164 | } | ||
| 165 | |||
| 166 | /* cache it */ | ||
| 167 | addStratumLineInfo(lineInfo); | ||
| 168 | |||
| 169 | return lineInfo; | ||
| 170 | } | ||
| 171 | |||
| 172 | void addStratumLineInfo(LineInfo lineInfo) { | ||
| 173 | otherLineInfo = lineInfo; | ||
| 174 | } | ||
| 175 | |||
| 176 | void addBaseLineInfo(LineInfo lineInfo) { | ||
| 177 | baseLineInfo = lineInfo; | ||
| 178 | } | ||
| 179 | |||
| 180 | public String sourceName() throws AbsentInformationException { | ||
| 181 | return sourceName(vm.getDefaultStratum()); | ||
| 182 | } | ||
| 183 | |||
| 184 | public String sourceName(String stratumID) | ||
| 185 | throws AbsentInformationException { | ||
| 186 | return sourceName(declaringType.stratum(stratumID)); | ||
| 187 | } | ||
| 188 | |||
| 189 | String sourceName(SDE.Stratum stratum) | ||
| 190 | throws AbsentInformationException { | ||
| 191 | return getLineInfo(stratum).liSourceName(); | ||
| 192 | } | ||
| 193 | |||
| 194 | public String sourcePath() throws AbsentInformationException { | ||
| 195 | return sourcePath(vm.getDefaultStratum()); | ||
| 196 | } | ||
| 197 | |||
| 198 | public String sourcePath(String stratumID) | ||
| 199 | throws AbsentInformationException { | ||
| 200 | return sourcePath(declaringType.stratum(stratumID)); | ||
| 201 | } | ||
| 202 | |||
| 203 | String sourcePath(SDE.Stratum stratum) | ||
| 204 | throws AbsentInformationException { | ||
| 205 | return getLineInfo(stratum).liSourcePath(); | ||
| 206 | } | ||
| 207 | |||
| 208 | public int lineNumber() { | ||
| 209 | return lineNumber(vm.getDefaultStratum()); | ||
| 210 | } | ||
| 211 | |||
| 212 | public int lineNumber(String stratumID) { | ||
| 213 | return lineNumber(declaringType.stratum(stratumID)); | ||
| 214 | } | ||
| 215 | |||
| 216 | int lineNumber(SDE.Stratum stratum) { | ||
| 217 | return getLineInfo(stratum).liLineNumber(); | ||
| 218 | } | ||
| 219 | |||
| 220 | public String toString() { | ||
| 221 | if (lineNumber() == -1) { | ||
| 222 | return method().toString() + "+" + codeIndex(); | ||
| 223 | } else { | ||
| 224 | return declaringType().name() + ":" + lineNumber(); | ||
| 225 | } | ||
| 226 | } | ||
| 227 | } | ||