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1 /*
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2 * Copyright 2000-2005 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.code;
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26
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27 import java.io.*;
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28 import java.util.*;
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29
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30 import sun.jvm.hotspot.asm.x86.*;
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31 import sun.jvm.hotspot.compiler.*;
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32 import sun.jvm.hotspot.debugger.*;
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33 import sun.jvm.hotspot.runtime.*;
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34 import sun.jvm.hotspot.types.*;
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35 import sun.jvm.hotspot.utilities.*;
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36
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37 public class CodeBlob extends VMObject {
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38 private static AddressField nameField;
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39 private static CIntegerField sizeField;
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40 private static CIntegerField headerSizeField;
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41 private static CIntegerField relocationSizeField;
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42 private static CIntegerField instructionsOffsetField;
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43 private static CIntegerField frameCompleteOffsetField;
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44 private static CIntegerField dataOffsetField;
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45 private static CIntegerField oopsOffsetField;
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46 private static CIntegerField oopsLengthField;
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47 private static CIntegerField frameSizeField;
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48 private static AddressField oopMapsField;
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49
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50 // Only used by server compiler on x86; computed over in SA rather
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51 // than relying on computation in target VM
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52 private static final int NOT_YET_COMPUTED = -2;
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53 private static final int UNDEFINED = -1;
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54 private int linkOffset = NOT_YET_COMPUTED;
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55 private static int matcherInterpreterFramePointerReg;
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56
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57 static {
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58 VM.registerVMInitializedObserver(new Observer() {
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59 public void update(Observable o, Object data) {
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60 initialize(VM.getVM().getTypeDataBase());
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61 }
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62 });
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63 }
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64
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65 private static void initialize(TypeDataBase db) {
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66 Type type = db.lookupType("CodeBlob");
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67
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68 nameField = type.getAddressField("_name");
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69 sizeField = type.getCIntegerField("_size");
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70 headerSizeField = type.getCIntegerField("_header_size");
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71 relocationSizeField = type.getCIntegerField("_relocation_size");
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72 frameCompleteOffsetField = type.getCIntegerField("_frame_complete_offset");
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73 instructionsOffsetField = type.getCIntegerField("_instructions_offset");
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74 dataOffsetField = type.getCIntegerField("_data_offset");
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75 oopsOffsetField = type.getCIntegerField("_oops_offset");
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76 oopsLengthField = type.getCIntegerField("_oops_length");
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77 frameSizeField = type.getCIntegerField("_frame_size");
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78 oopMapsField = type.getAddressField("_oop_maps");
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79
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80 if (VM.getVM().isServerCompiler()) {
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81 matcherInterpreterFramePointerReg =
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82 db.lookupIntConstant("Matcher::interpreter_frame_pointer_reg").intValue();
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83 }
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84 }
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85
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86 public CodeBlob(Address addr) {
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87 super(addr);
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88 }
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89
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90 // Typing
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91 public boolean isBufferBlob() { return false; }
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92 public boolean isNMethod() { return false; }
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93 public boolean isRuntimeStub() { return false; }
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94 public boolean isDeoptimizationStub() { return false; }
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95 public boolean isUncommonTrapStub() { return false; }
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96 public boolean isExceptionStub() { return false; }
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97 public boolean isSafepointStub() { return false; }
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98
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99 // Fine grain nmethod support: isNmethod() == isJavaMethod() || isNativeMethod() || isOSRMethod()
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100 public boolean isJavaMethod() { return false; }
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101 public boolean isNativeMethod() { return false; }
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102 /** On-Stack Replacement method */
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103 public boolean isOSRMethod() { return false; }
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104
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105 // Boundaries
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106 public Address headerBegin() {
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107 return addr;
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108 }
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109
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110 public Address headerEnd() {
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111 return addr.addOffsetTo(headerSizeField.getValue(addr));
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112 }
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113
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114 // FIXME: add RelocInfo
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115 // public RelocInfo relocationBegin();
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116 // public RelocInfo relocationEnd();
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117
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118 public Address instructionsBegin() {
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119 return headerBegin().addOffsetTo(instructionsOffsetField.getValue(addr));
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120 }
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121
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122 public Address instructionsEnd() {
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123 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr));
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124 }
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125
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126 public Address dataBegin() {
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127 return headerBegin().addOffsetTo(dataOffsetField.getValue(addr));
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128 }
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129
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130 public Address dataEnd() {
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131 return headerBegin().addOffsetTo(sizeField.getValue(addr));
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132 }
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133
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134 public Address oopsBegin() {
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135 return headerBegin().addOffsetTo(oopsOffsetField.getValue(addr));
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136 }
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137
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138 public Address oopsEnd() {
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139 return oopsBegin().addOffsetTo(getOopsLength());
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140 }
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141
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142 // Offsets
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143 public int getRelocationOffset() { return (int) headerSizeField.getValue(addr); }
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144 public int getInstructionsOffset() { return (int) instructionsOffsetField.getValue(addr); }
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145 public int getDataOffset() { return (int) dataOffsetField.getValue(addr); }
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146 public int getOopsOffset() { return (int) oopsOffsetField.getValue(addr); }
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147
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148 // Sizes
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149 public int getSize() { return (int) sizeField.getValue(addr); }
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150 public int getHeaderSize() { return (int) headerSizeField.getValue(addr); }
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151 // FIXME: add getRelocationSize()
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152 public int getInstructionsSize() { return (int) instructionsEnd().minus(instructionsBegin()); }
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153 public int getDataSize() { return (int) dataEnd().minus(dataBegin()); }
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154
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155 // Containment
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156 public boolean blobContains(Address addr) { return headerBegin().lessThanOrEqual(addr) && dataEnd().greaterThan(addr); }
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157 // FIXME: add relocationContains
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158 public boolean instructionsContains(Address addr) { return instructionsBegin().lessThanOrEqual(addr) && instructionsEnd().greaterThan(addr); }
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159 public boolean dataContains(Address addr) { return dataBegin().lessThanOrEqual(addr) && dataEnd().greaterThan(addr); }
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160 public boolean oopsContains(Address addr) { return oopsBegin().lessThanOrEqual(addr) && oopsEnd().greaterThan(addr); }
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161 public boolean contains(Address addr) { return instructionsContains(addr); }
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162 public boolean isFrameCompleteAt(Address a) { return instructionsContains(a) && a.minus(instructionsBegin()) >= frameCompleteOffsetField.getValue(addr); }
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163
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164 /** Support for oops in scopes and relocs. Note: index 0 is reserved for null. */
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165 public OopHandle getOopAt(int index) {
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166 if (index == 0) return null;
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167 if (Assert.ASSERTS_ENABLED) {
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168 Assert.that(index > 0 && index <= getOopsLength(), "must be a valid non-zero index");
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169 }
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170 return oopsBegin().getOopHandleAt((index - 1) * VM.getVM().getOopSize());
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171 }
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172
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173 // Reclamation support (really only used by the nmethods, but in order to get asserts to work
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174 // in the CodeCache they are defined virtual here)
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175 public boolean isZombie() { return false; }
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176 public boolean isLockedByVM() { return false; }
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177
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178 /** OopMap for frame; can return null if none available */
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179 public OopMapSet getOopMaps() {
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180 Address oopMapsAddr = oopMapsField.getValue(addr);
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181 if (oopMapsAddr == null) {
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182 return null;
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183 }
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184 return new OopMapSet(oopMapsAddr);
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185 }
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186 // FIXME: not yet implementable
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187 // void set_oop_maps(OopMapSet* p);
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188
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189 public OopMap getOopMapForReturnAddress(Address returnAddress, boolean debugging) {
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190 Address pc = returnAddress;
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191 if (Assert.ASSERTS_ENABLED) {
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192 Assert.that(getOopMaps() != null, "nope");
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193 }
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194 return getOopMaps().findMapAtOffset(pc.minus(instructionsBegin()), debugging);
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195 }
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196
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197 // virtual void preserve_callee_argument_oops(frame fr, const RegisterMap* reg_map, void f(oop*)) { ShouldNotReachHere(); }
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198 // FIXME;
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199
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200 /** NOTE: this returns a size in BYTES in this system! */
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201 public long getFrameSize() {
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202 return VM.getVM().getAddressSize() * frameSizeField.getValue(addr);
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203 }
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204
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205 // Returns true, if the next frame is responsible for GC'ing oops passed as arguments
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206 public boolean callerMustGCArguments(JavaThread thread) { return false; }
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207
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208 public String getName() {
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209 return CStringUtilities.getString(nameField.getValue(addr));
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210 }
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211
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212 // FIXME: NOT FINISHED
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213
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214 // FIXME: add more accessors
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215
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216 public void print() {
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217 printOn(System.out);
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218 }
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219
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220 public void printOn(PrintStream tty) {
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221 tty.print(getName());
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222 printComponentsOn(tty);
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223 }
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224
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225 protected void printComponentsOn(PrintStream tty) {
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226 // FIXME: add relocation information
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227 tty.println(" instructions: [" + instructionsBegin() + ", " + instructionsEnd() + "), " +
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228 " data: [" + dataBegin() + ", " + dataEnd() + "), " +
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229 " oops: [" + oopsBegin() + ", " + oopsEnd() + "), " +
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230 " frame size: " + getFrameSize());
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231 }
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232
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233 //--------------------------------------------------------------------------------
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234 // Internals only below this point
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235 //
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236
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237 private int getOopsLength() {
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238 return (int) oopsLengthField.getValue(addr);
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239 }
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240 }
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