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0
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1 /*
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2 * Copyright 2002 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.debugger.linux;
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26
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27 import sun.jvm.hotspot.debugger.*;
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28
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29 class LinuxAddress implements Address {
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30 protected LinuxDebugger debugger;
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31 protected long addr;
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32
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33 LinuxAddress(LinuxDebugger debugger, long addr) {
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34 this.debugger = debugger;
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35 this.addr = addr;
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36 }
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37
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38 //
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39 // Basic Java routines
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40 //
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41
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42 public boolean equals(Object arg) {
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43 if (arg == null) {
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44 return false;
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45 }
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46
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47 if (!(arg instanceof LinuxAddress)) {
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48 return false;
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49 }
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50
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51 return (addr == ((LinuxAddress) arg).addr);
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52 }
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53
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54 public int hashCode() {
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55 // FIXME: suggestions on a better hash code?
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56 return (int) addr;
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57 }
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58
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59 public String toString() {
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60 return debugger.addressValueToString(addr);
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61 }
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62
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63 //
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64 // C/C++-related routines
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65 //
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66
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67 public long getCIntegerAt(long offset, long numBytes, boolean isUnsigned)
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68 throws UnalignedAddressException, UnmappedAddressException {
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69 return debugger.readCInteger(addr + offset, numBytes, isUnsigned);
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70 }
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71
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72 public Address getAddressAt(long offset)
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73 throws UnalignedAddressException, UnmappedAddressException {
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74 return debugger.readAddress(addr + offset);
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75 }
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76
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77 //
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78 // Java-related routines
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79 //
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80
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81 public boolean getJBooleanAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
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82 return debugger.readJBoolean(addr + offset);
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83 }
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84
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85 public byte getJByteAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
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86 return debugger.readJByte(addr + offset);
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87 }
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88
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89 public char getJCharAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
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90 return debugger.readJChar(addr + offset);
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91 }
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92
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93 public double getJDoubleAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
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94 return debugger.readJDouble(addr + offset);
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95 }
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96
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97 public float getJFloatAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
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98 return debugger.readJFloat(addr + offset);
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99 }
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100
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101 public int getJIntAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
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102 return debugger.readJInt(addr + offset);
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103 }
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104
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105 public long getJLongAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
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106 return debugger.readJLong(addr + offset);
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107 }
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108
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109 public short getJShortAt(long offset) throws UnalignedAddressException, UnmappedAddressException {
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110 return debugger.readJShort(addr + offset);
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111 }
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112
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113 public OopHandle getOopHandleAt(long offset)
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114 throws UnalignedAddressException, UnmappedAddressException, NotInHeapException {
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115 return debugger.readOopHandle(addr + offset);
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116 }
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117
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118 // Mutators -- not implemented for now (FIXME)
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119 public void setCIntegerAt(long offset, long numBytes, long value) {
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120 throw new DebuggerException("Unimplemented");
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121 }
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122 public void setAddressAt(long offset, Address value) {
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123 throw new DebuggerException("Unimplemented");
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124 }
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125 public void setJBooleanAt (long offset, boolean value)
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126 throws UnmappedAddressException, UnalignedAddressException {
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127 throw new DebuggerException("Unimplemented");
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128 }
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129 public void setJByteAt (long offset, byte value)
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130 throws UnmappedAddressException, UnalignedAddressException {
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131 throw new DebuggerException("Unimplemented");
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132 }
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133 public void setJCharAt (long offset, char value)
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134 throws UnmappedAddressException, UnalignedAddressException {
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135 throw new DebuggerException("Unimplemented");
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136 }
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137 public void setJDoubleAt (long offset, double value)
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138 throws UnmappedAddressException, UnalignedAddressException {
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139 throw new DebuggerException("Unimplemented");
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140 }
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141 public void setJFloatAt (long offset, float value)
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142 throws UnmappedAddressException, UnalignedAddressException {
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143 throw new DebuggerException("Unimplemented");
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144 }
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145 public void setJIntAt (long offset, int value)
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146 throws UnmappedAddressException, UnalignedAddressException {
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147 throw new DebuggerException("Unimplemented");
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148 }
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149 public void setJLongAt (long offset, long value)
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150 throws UnmappedAddressException, UnalignedAddressException {
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151 throw new DebuggerException("Unimplemented");
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152 }
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153 public void setJShortAt (long offset, short value)
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154 throws UnmappedAddressException, UnalignedAddressException {
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155 throw new DebuggerException("Unimplemented");
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156 }
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157 public void setOopHandleAt (long offset, OopHandle value)
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158 throws UnmappedAddressException, UnalignedAddressException {
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159 throw new DebuggerException("Unimplemented");
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160 }
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161
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162 //
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163 // Arithmetic operations -- necessary evil.
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164 //
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165
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166 public Address addOffsetTo (long offset) throws UnsupportedOperationException {
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167 long value = addr + offset;
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168 if (value == 0) {
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169 return null;
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170 }
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171 return new LinuxAddress(debugger, value);
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172 }
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173
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174 public OopHandle addOffsetToAsOopHandle(long offset) throws UnsupportedOperationException {
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175 long value = addr + offset;
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176 if (value == 0) {
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177 return null;
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178 }
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179 return new LinuxOopHandle(debugger, value);
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180 }
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181
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182 /** (FIXME: any signed/unsigned issues? Should this work for
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183 OopHandles?) */
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184 public long minus(Address arg) {
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185 if (arg == null) {
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186 return addr;
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187 }
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188 return addr - ((LinuxAddress) arg).addr;
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189 }
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190
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191 // Two's complement representation.
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192 // All negative numbers are larger than positive numbers.
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193 // Numbers with the same sign can be compared normally.
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194 // Test harness is below in main().
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195
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196 public boolean lessThan (Address a) {
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197 if (a == null) {
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198 return false;
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199 }
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200 LinuxAddress arg = (LinuxAddress) a;
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201 if ((addr >= 0) && (arg.addr < 0)) {
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202 return true;
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203 }
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204 if ((addr < 0) && (arg.addr >= 0)) {
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205 return false;
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206 }
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207 return (addr < arg.addr);
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208 }
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209
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210 public boolean lessThanOrEqual (Address a) {
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211 if (a == null) {
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212 return false;
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213 }
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214 LinuxAddress arg = (LinuxAddress) a;
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215 if ((addr >= 0) && (arg.addr < 0)) {
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216 return true;
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217 }
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218 if ((addr < 0) && (arg.addr >= 0)) {
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219 return false;
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220 }
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221 return (addr <= arg.addr);
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222 }
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223
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224 public boolean greaterThan (Address a) {
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225 if (a == null) {
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226 return true;
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227 }
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228 LinuxAddress arg = (LinuxAddress) a;
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229 if ((addr >= 0) && (arg.addr < 0)) {
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230 return false;
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231 }
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232 if ((addr < 0) && (arg.addr >= 0)) {
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233 return true;
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234 }
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235 return (addr > arg.addr);
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236 }
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237
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238 public boolean greaterThanOrEqual(Address a) {
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239 if (a == null) {
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240 return true;
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241 }
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242 LinuxAddress arg = (LinuxAddress) a;
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243 if ((addr >= 0) && (arg.addr < 0)) {
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244 return false;
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245 }
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246 if ((addr < 0) && (arg.addr >= 0)) {
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247 return true;
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248 }
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249 return (addr >= arg.addr);
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250 }
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251
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252 public Address andWithMask(long mask) throws UnsupportedOperationException {
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253 long value = addr & mask;
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254 if (value == 0) {
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255 return null;
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256 }
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257 return new LinuxAddress(debugger, value);
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258 }
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259
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260 public Address orWithMask(long mask) throws UnsupportedOperationException {
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261 long value = addr | mask;
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262 if (value == 0) {
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263 return null;
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264 }
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265 return new LinuxAddress(debugger, value);
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266 }
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267
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268 public Address xorWithMask(long mask) throws UnsupportedOperationException {
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269 long value = addr ^ mask;
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270 if (value == 0) {
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271 return null;
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272 }
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273 return new LinuxAddress(debugger, value);
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274 }
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275
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276
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277 //--------------------------------------------------------------------------------
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278 // Internals only below this point
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279 //
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280
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281 long getValue() {
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282 return addr;
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283 }
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284
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285
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286 private static void check(boolean arg, String failMessage) {
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287 if (!arg) {
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288 System.err.println(failMessage + ": FAILED");
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289 System.exit(1);
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290 }
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291 }
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292
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293 // Test harness
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294 public static void main(String[] args) {
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295 // p/n indicates whether the interior address is really positive
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296 // or negative. In unsigned terms, p1 < p2 < n1 < n2.
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297
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298 LinuxAddress p1 = new LinuxAddress(null, 0x7FFFFFFFFFFFFFF0L);
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299 LinuxAddress p2 = (LinuxAddress) p1.addOffsetTo(10);
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300 LinuxAddress n1 = (LinuxAddress) p2.addOffsetTo(10);
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301 LinuxAddress n2 = (LinuxAddress) n1.addOffsetTo(10);
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302
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303 // lessThan positive tests
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304 check(p1.lessThan(p2), "lessThan 1");
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305 check(p1.lessThan(n1), "lessThan 2");
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306 check(p1.lessThan(n2), "lessThan 3");
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307 check(p2.lessThan(n1), "lessThan 4");
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308 check(p2.lessThan(n2), "lessThan 5");
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309 check(n1.lessThan(n2), "lessThan 6");
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310
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311 // lessThan negative tests
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312 check(!p1.lessThan(p1), "lessThan 7");
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313 check(!p2.lessThan(p2), "lessThan 8");
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314 check(!n1.lessThan(n1), "lessThan 9");
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315 check(!n2.lessThan(n2), "lessThan 10");
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316
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317 check(!p2.lessThan(p1), "lessThan 11");
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318 check(!n1.lessThan(p1), "lessThan 12");
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319 check(!n2.lessThan(p1), "lessThan 13");
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320 check(!n1.lessThan(p2), "lessThan 14");
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321 check(!n2.lessThan(p2), "lessThan 15");
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322 check(!n2.lessThan(n1), "lessThan 16");
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323
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324 // lessThanOrEqual positive tests
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325 check(p1.lessThanOrEqual(p1), "lessThanOrEqual 1");
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326 check(p2.lessThanOrEqual(p2), "lessThanOrEqual 2");
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327 check(n1.lessThanOrEqual(n1), "lessThanOrEqual 3");
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328 check(n2.lessThanOrEqual(n2), "lessThanOrEqual 4");
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329
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330 check(p1.lessThanOrEqual(p2), "lessThanOrEqual 5");
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331 check(p1.lessThanOrEqual(n1), "lessThanOrEqual 6");
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332 check(p1.lessThanOrEqual(n2), "lessThanOrEqual 7");
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333 check(p2.lessThanOrEqual(n1), "lessThanOrEqual 8");
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334 check(p2.lessThanOrEqual(n2), "lessThanOrEqual 9");
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335 check(n1.lessThanOrEqual(n2), "lessThanOrEqual 10");
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336
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337 // lessThanOrEqual negative tests
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338 check(!p2.lessThanOrEqual(p1), "lessThanOrEqual 11");
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339 check(!n1.lessThanOrEqual(p1), "lessThanOrEqual 12");
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340 check(!n2.lessThanOrEqual(p1), "lessThanOrEqual 13");
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341 check(!n1.lessThanOrEqual(p2), "lessThanOrEqual 14");
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342 check(!n2.lessThanOrEqual(p2), "lessThanOrEqual 15");
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343 check(!n2.lessThanOrEqual(n1), "lessThanOrEqual 16");
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344
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345 // greaterThan positive tests
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346 check(n2.greaterThan(p1), "greaterThan 1");
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347 check(n2.greaterThan(p2), "greaterThan 2");
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348 check(n2.greaterThan(n1), "greaterThan 3");
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349 check(n1.greaterThan(p1), "greaterThan 4");
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350 check(n1.greaterThan(p2), "greaterThan 5");
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351 check(p2.greaterThan(p1), "greaterThan 6");
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352
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353 // greaterThan negative tests
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354 check(!p1.greaterThan(p1), "greaterThan 7");
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355 check(!p2.greaterThan(p2), "greaterThan 8");
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356 check(!n1.greaterThan(n1), "greaterThan 9");
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357 check(!n2.greaterThan(n2), "greaterThan 10");
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358
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359 check(!p1.greaterThan(n2), "greaterThan 11");
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360 check(!p2.greaterThan(n2), "greaterThan 12");
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361 check(!n1.greaterThan(n2), "greaterThan 13");
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362 check(!p1.greaterThan(n1), "greaterThan 14");
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363 check(!p2.greaterThan(n1), "greaterThan 15");
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364 check(!p1.greaterThan(p2), "greaterThan 16");
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365
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366 // greaterThanOrEqual positive tests
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367 check(p1.greaterThanOrEqual(p1), "greaterThanOrEqual 1");
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368 check(p2.greaterThanOrEqual(p2), "greaterThanOrEqual 2");
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369 check(n1.greaterThanOrEqual(n1), "greaterThanOrEqual 3");
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370 check(n2.greaterThanOrEqual(n2), "greaterThanOrEqual 4");
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371
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372 check(n2.greaterThanOrEqual(p1), "greaterThanOrEqual 5");
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373 check(n2.greaterThanOrEqual(p2), "greaterThanOrEqual 6");
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374 check(n2.greaterThanOrEqual(n1), "greaterThanOrEqual 7");
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375 check(n1.greaterThanOrEqual(p1), "greaterThanOrEqual 8");
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376 check(n1.greaterThanOrEqual(p2), "greaterThanOrEqual 9");
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377 check(p2.greaterThanOrEqual(p1), "greaterThanOrEqual 10");
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378
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379 // greaterThanOrEqual negative tests
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380 check(!p1.greaterThanOrEqual(n2), "greaterThanOrEqual 11");
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381 check(!p2.greaterThanOrEqual(n2), "greaterThanOrEqual 12");
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382 check(!n1.greaterThanOrEqual(n2), "greaterThanOrEqual 13");
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383 check(!p1.greaterThanOrEqual(n1), "greaterThanOrEqual 14");
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384 check(!p2.greaterThanOrEqual(n1), "greaterThanOrEqual 15");
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385 check(!p1.greaterThanOrEqual(p2), "greaterThanOrEqual 16");
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386
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387 System.err.println("LinuxAddress: all tests passed successfully.");
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388 }
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389 }
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