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1 /*
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2 * Copyright 2002-2003 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.jdi;
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26
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27 import com.sun.jdi.*;
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28
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29 import java.util.*;
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30
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31 public class LocationImpl extends MirrorImpl implements Location {
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32 private final ReferenceTypeImpl declaringType;
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33 private Method method;
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34 private sun.jvm.hotspot.oops.Method methodRef;
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35 private long codeIndex;
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36 private LineInfo baseLineInfo = null;
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37 private LineInfo otherLineInfo = null;
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38
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39 LocationImpl(VirtualMachine vm,
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40 Method method, long codeIndex) {
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41 super(vm);
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42
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43 this.method = method;
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44 this.codeIndex = method.isNative()? -1 : codeIndex;
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45 this.declaringType = (ReferenceTypeImpl)method.declaringType();
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46 }
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47
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48 /*
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49 * This constructor allows lazy creation of the method mirror. This
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50 * can be a performance savings if the method mirror does not yet
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51 * exist.
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52 */
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53 LocationImpl(VirtualMachine vm, ReferenceType declaringType,
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54 sun.jvm.hotspot.oops.Method methodRef, long codeIndex) {
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55 super(vm);
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56
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57 this.method = null;
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58 this.codeIndex = codeIndex;
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59 this.declaringType = (ReferenceTypeImpl)declaringType;
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60 this.methodRef = methodRef;
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61 }
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62
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63 public boolean equals(Object obj) {
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64 if ((obj != null) && (obj instanceof Location)) {
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65 Location other = (Location)obj;
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66 return (method().equals(other.method())) &&
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67 (codeIndex() == other.codeIndex()) &&
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68 super.equals(obj);
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69 } else {
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70 return false;
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71 }
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72 }
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73
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74 public int hashCode() {
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75 /*
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76 * TO DO: better hash code?
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77 */
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78 return method().hashCode() + (int)codeIndex();
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79 }
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80
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81 public int compareTo(Object object) {
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82 LocationImpl other = (LocationImpl)object;
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83 int rc = method().compareTo(other.method());
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84 if (rc == 0) {
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85 long diff = codeIndex() - other.codeIndex();
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86 if (diff < 0)
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87 return -1;
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88 else if (diff > 0)
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89 return 1;
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90 else
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91 return 0;
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92 }
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93 return rc;
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94 }
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95
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96 public ReferenceType declaringType() {
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97 return declaringType;
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98 }
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99
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100 public Method method() {
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101 if (method == null) {
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102 method = declaringType.getMethodMirror(methodRef);
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103 if (method.isNative()) {
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104 codeIndex = -1;
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105 }
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106 }
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107 return method;
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108 }
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109
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110 public long codeIndex() {
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111 method(); // be sure information is up-to-date
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112 return codeIndex;
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113 }
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114
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115 LineInfo getBaseLineInfo(SDE.Stratum stratum) {
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116 LineInfo lineInfo;
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117
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118 /* check if there is cached info to use */
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119 if (baseLineInfo != null) {
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120 return baseLineInfo;
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121 }
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122
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123 /* compute the line info */
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124 MethodImpl methodImpl = (MethodImpl)method();
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125 lineInfo = methodImpl.codeIndexToLineInfo(stratum,
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126 codeIndex());
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127
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128 /* cache it */
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129 addBaseLineInfo(lineInfo);
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130
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131 return lineInfo;
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132 }
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133
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134 LineInfo getLineInfo(SDE.Stratum stratum) {
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135 LineInfo lineInfo;
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136
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137 /* base stratum is done slighly differently */
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138 if (stratum.isJava()) {
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139 return getBaseLineInfo(stratum);
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140 }
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141
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142 /* check if there is cached info to use */
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143 lineInfo = otherLineInfo; // copy because of concurrency
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144 if (lineInfo != null &&
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145 stratum.id().equals(lineInfo.liStratum())) {
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146 return lineInfo;
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147 }
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148 int baseLineNumber = lineNumber(SDE.BASE_STRATUM_NAME);
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149 SDE.LineStratum lineStratum =
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150 stratum.lineStratum(declaringType, baseLineNumber);
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151
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152 if (lineStratum != null && lineStratum.lineNumber() != -1) {
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153 lineInfo = new StratumLineInfo(stratum.id(),
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154 lineStratum.lineNumber(),
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155 lineStratum.sourceName(),
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156 lineStratum.sourcePath());
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157 } else {
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158 /* find best match */
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159 MethodImpl methodImpl = (MethodImpl)method();
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160 lineInfo = methodImpl.codeIndexToLineInfo(stratum,
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161 codeIndex());
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162 }
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163
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164 /* cache it */
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165 addStratumLineInfo(lineInfo);
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166
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167 return lineInfo;
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168 }
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169
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170 void addStratumLineInfo(LineInfo lineInfo) {
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171 otherLineInfo = lineInfo;
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172 }
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173
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174 void addBaseLineInfo(LineInfo lineInfo) {
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175 baseLineInfo = lineInfo;
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176 }
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177
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178 public String sourceName() throws AbsentInformationException {
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179 return sourceName(vm.getDefaultStratum());
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180 }
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181
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182 public String sourceName(String stratumID)
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183 throws AbsentInformationException {
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184 return sourceName(declaringType.stratum(stratumID));
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185 }
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186
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187 String sourceName(SDE.Stratum stratum)
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188 throws AbsentInformationException {
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189 return getLineInfo(stratum).liSourceName();
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190 }
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191
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192 public String sourcePath() throws AbsentInformationException {
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193 return sourcePath(vm.getDefaultStratum());
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194 }
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195
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196 public String sourcePath(String stratumID)
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197 throws AbsentInformationException {
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198 return sourcePath(declaringType.stratum(stratumID));
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199 }
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200
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201 String sourcePath(SDE.Stratum stratum)
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202 throws AbsentInformationException {
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203 return getLineInfo(stratum).liSourcePath();
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204 }
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205
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206 public int lineNumber() {
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207 return lineNumber(vm.getDefaultStratum());
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208 }
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209
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210 public int lineNumber(String stratumID) {
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211 return lineNumber(declaringType.stratum(stratumID));
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212 }
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213
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214 int lineNumber(SDE.Stratum stratum) {
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215 return getLineInfo(stratum).liLineNumber();
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216 }
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217
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218 public String toString() {
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219 if (lineNumber() == -1) {
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220 return method().toString() + "+" + codeIndex();
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221 } else {
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222 return declaringType().name() + ":" + lineNumber();
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223 }
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224 }
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225 }
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