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1 /*
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2 * Copyright 2004-2007 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.utilities.soql;
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26
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27 import java.util.*;
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28 import javax.script.ScriptException;
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.memory.*;
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31 import sun.jvm.hotspot.oops.*;
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32 import sun.jvm.hotspot.runtime.*;
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33 import sun.jvm.hotspot.utilities.*;
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34 import java.lang.reflect.Method;
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35
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36 public class JSJavaHeap extends DefaultScriptObject {
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37 private static final int FIELD_CAPACITY = 0;
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38 private static final int FIELD_USED = 1;
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39 private static final int FIELD_FOR_EACH_OBJECT = 2;
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40 private static final int FIELD_FOR_EACH_CLASS = 3;
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41
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42 private static final int FIELD_UNDEFINED = -1;
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43
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44 public JSJavaHeap(JSJavaFactory fac) {
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45 this.factory = fac;
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46 }
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47
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48 public Object get(String name) {
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49 int fieldID = getFieldID(name);
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50 switch (fieldID) {
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51 case FIELD_CAPACITY:
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52 return new Long(getCapacity());
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53 case FIELD_USED:
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54 return new Long(getUsed());
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55 case FIELD_FOR_EACH_OBJECT:
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56 return new MethodCallable(this, forEachObjectMethod);
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57 case FIELD_FOR_EACH_CLASS:
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58 return new MethodCallable(this, forEachClassMethod);
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59 case FIELD_UNDEFINED:
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60 default:
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61 return super.get(name);
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62 }
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63 }
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64
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65 public Object[] getIds() {
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66 Object[] superIds = super.getIds();
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67 Object[] tmp = fields.keySet().toArray();
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68 Object[] res = new Object[superIds.length + tmp.length];
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69 System.arraycopy(tmp, 0, res, 0, tmp.length);
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70 System.arraycopy(superIds, 0, res, tmp.length, superIds.length);
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71 return res;
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72 }
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73
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74 public boolean has(String name) {
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75 if (getFieldID(name) != FIELD_UNDEFINED) {
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76 return true;
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77 } else {
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78 return super.has(name);
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79 }
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80 }
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81
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82 public void put(String name, Object value) {
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83 if (getFieldID(name) == FIELD_UNDEFINED) {
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84 super.put(name, value);
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85 }
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86 }
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87
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88 public void forEachObject(Object[] args) {
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89 boolean subtypes = true;
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90 Klass kls = null;
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91 Callable func = null;
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92 switch (args.length) {
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93 case 3: {
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94 Object b = args[2];
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95 if (b != null && b instanceof Boolean) {
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96 subtypes = ((Boolean)b).booleanValue();
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97 }
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98 }
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99 case 2: {
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100 Object k = args[1];
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101 if (k == null) return;
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102 if (k instanceof JSJavaKlass) {
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103 kls = ((JSJavaKlass)k).getKlass();
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104 } else if (k instanceof String) {
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105 kls = SystemDictionaryHelper.findInstanceKlass((String)k);
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106 if (kls == null) return;
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107 }
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108 }
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109 case 1: {
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110 Object f = args[0];
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111 if (f != null && f instanceof Callable) {
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112 func = (Callable) f;
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113 } else {
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114 // unknown target - just return
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115 return ;
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116 }
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117 }
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118 break;
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119
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120 default:
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121 return;
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122 }
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123
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124 final Callable finalFunc = func;
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125 HeapVisitor visitor = new DefaultHeapVisitor() {
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126 public boolean doObj(Oop oop) {
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127 JSJavaObject jo = factory.newJSJavaObject(oop);
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128 if (jo != null) {
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129 try {
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130 finalFunc.call(new Object[] { jo });
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131 } catch (ScriptException exp) {
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132 throw new RuntimeException(exp);
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133 }
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134 }
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135 return false;
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136 }
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137 };
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138 ObjectHeap heap = VM.getVM().getObjectHeap();
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139 if (kls == null) {
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140 kls = SystemDictionaryHelper.findInstanceKlass("java.lang.Object");
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141 }
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142 heap.iterateObjectsOfKlass(visitor, kls, subtypes);
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143 }
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144
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145 public void forEachClass(Object[] args) {
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146 boolean withLoader = false;
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147 Callable func = null;
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148 switch (args.length) {
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149 case 2: {
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150 Object b = args[1];
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151 if (b instanceof Boolean) {
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152 withLoader = ((Boolean)b).booleanValue();
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153 }
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154 }
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155 case 1: {
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156 Object f = args[0];
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157 if (f instanceof Callable) {
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158 func = (Callable) f;
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159 } else {
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160 return;
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161 }
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162 }
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163 break;
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164 default:
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165 return;
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166 }
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167
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168 final Callable finalFunc = func;
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169 SystemDictionary sysDict = VM.getVM().getSystemDictionary();
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170 if (withLoader) {
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171 sysDict.classesDo(new SystemDictionary.ClassAndLoaderVisitor() {
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172 public void visit(Klass kls, Oop loader) {
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173 JSJavaKlass jk = factory.newJSJavaKlass(kls);
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174 if (jk == null) {
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175 return;
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176 }
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177 JSJavaObject k = jk.getJSJavaClass();
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178 JSJavaObject l = factory.newJSJavaObject(loader);
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179 if (k != null) {
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180 if (k != null) {
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181 try {
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182 finalFunc.call(new Object[] { k, l });
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183 } catch (ScriptException exp) {
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184 throw new RuntimeException(exp);
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185 }
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186 }
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187 }
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188 }
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189 });
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190
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191 } else {
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192 sysDict.classesDo(new SystemDictionary.ClassVisitor() {
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193 public void visit(Klass kls) {
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194 JSJavaKlass jk = factory.newJSJavaKlass(kls);
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195 if (jk == null) {
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196 return;
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197 }
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198 JSJavaClass k = jk.getJSJavaClass();
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199 if (k != null) {
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200 if (k != null) {
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201 try {
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202 finalFunc.call(new Object[] { k });
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203 } catch (ScriptException exp) {
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204 throw new RuntimeException(exp);
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205 }
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206 }
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207 }
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208 }
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209 });
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210 }
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211 }
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212
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213 public String toString() {
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214 StringBuffer buf = new StringBuffer();
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215 buf.append("Java Heap (capacity=");
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216 buf.append(getCapacity());
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217 buf.append(", used=");
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218 buf.append(getUsed());
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219 buf.append(")");
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220 return buf.toString();
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221 }
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222
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223 //-- Internals only below this point
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224 private static Map fields = new HashMap();
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225 private static void addField(String name, int fieldId) {
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226 fields.put(name, new Integer(fieldId));
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227 }
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228
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229 private static int getFieldID(String name) {
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230 Integer res = (Integer) fields.get(name);
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231 return (res != null)? res.intValue() : FIELD_UNDEFINED;
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232 }
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233
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234 static {
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235 addField("capacity", FIELD_CAPACITY);
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236 addField("used", FIELD_USED);
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237 addField("forEachObject", FIELD_FOR_EACH_OBJECT);
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238 addField("forEachClass", FIELD_FOR_EACH_CLASS);
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239 try {
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240 Class myClass = JSJavaHeap.class;
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241 forEachObjectMethod = myClass.getMethod("forEachObject",
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242 new Class[] { Object[].class });
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243 forEachClassMethod = myClass.getMethod("forEachClass",
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244 new Class[] {Object[].class });
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245 } catch (RuntimeException re) {
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246 throw re;
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247 } catch (Exception exp) {
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248 throw new RuntimeException(exp);
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249 }
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250 }
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251
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252 private long getCapacity() {
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253 return VM.getVM().getUniverse().heap().capacity();
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254 }
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255
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256 private long getUsed() {
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257 return VM.getVM().getUniverse().heap().used();
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258 }
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259
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260 private final JSJavaFactory factory;
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261 private static Method forEachObjectMethod;
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262 private static Method forEachClassMethod;
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263 }
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