Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/ObjectReader.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | d8a240abb23a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2002, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.utilities; | |
| 26 | |
| 27 import java.lang.reflect.Modifier; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.oops.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
| 34 /** | |
| 35 * ObjectReader can "deserialize" objects from debuggee. | |
| 36 * | |
| 37 * Class Loading: | |
| 38 * | |
| 39 * ObjectReader loads classes using the given class loader. If no | |
| 40 * class loader is supplied, it uses a ProcImageClassLoader, which | |
| 41 * loads classes from debuggee core or process. | |
| 42 | |
| 43 * Object creation: | |
| 44 * | |
| 45 * This class uses no-arg constructor to construct objects. But if | |
| 46 * there is no no-arg constructor in a given class, then it tries to | |
| 47 * use other constructors with 'default' values - null for object | |
| 48 * types, 0, 0.0, false etc. for primitives. If this process fails to | |
| 49 * construct an instance (because of null checking by constructor or 0 | |
| 50 * being invalid for an int arg etc.), then null is returned. While | |
| 51 * constructing complete object graph 'null' is inserted silently on | |
| 52 * failure and the deserialization continues to construct best-effort | |
| 53 * object graph. | |
| 54 * | |
| 55 * Debug messages: | |
| 56 * | |
| 57 * The flag sun.jvm.hotspot.utilities.ObjectReader.DEBUG may be set to | |
| 58 * non-null to get debug error messages and stack traces. | |
| 59 * | |
| 60 * JDK version: | |
| 61 * | |
| 62 * JDK classes are loaded by bootstrap class loader and not by the | |
| 63 * supplied class loader or ProcImageClassLoader. This may create | |
| 64 * problems if a JDK class evolves. i.e., if SA runs a JDK version | |
| 65 * different from that of the debuggee, there is a possibility of | |
| 66 * schema change. It is recommended that the matching JDK version be | |
| 67 * used to run SA for proper object deserialization. | |
| 68 * | |
| 69 */ | |
| 70 | |
| 71 public class ObjectReader { | |
| 72 | |
| 73 private static final boolean DEBUG; | |
| 74 static { | |
| 75 DEBUG = System.getProperty("sun.jvm.hotspot.utilities.ObjectReader.DEBUG") != null; | |
| 76 } | |
| 77 | |
| 78 public ObjectReader(ClassLoader cl) { | |
| 79 this.cl = cl; | |
| 80 this.oopToObjMap = new HashMap(); | |
| 81 this.fieldMap = new HashMap(); | |
| 82 } | |
| 83 | |
| 84 public ObjectReader() { | |
| 85 this(new ProcImageClassLoader()); | |
| 86 } | |
| 87 | |
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88 static void debugPrintln(String msg) { |
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89 if (DEBUG) { |
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90 System.err.println("DEBUG>" + msg); |
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91 } |
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92 } |
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93 |
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94 static void debugPrintStackTrace(Exception exp) { |
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95 if (DEBUG) { |
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96 StackTraceElement[] els = exp.getStackTrace(); |
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97 for (int i = 0; i < els.length; i++) { |
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98 System.err.println("DEBUG>" + els[i].toString()); |
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99 } |
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100 } |
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101 } |
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102 |
| 0 | 103 public Object readObject(Oop oop) throws ClassNotFoundException { |
| 104 if (oop instanceof Instance) { | |
| 105 return readInstance((Instance) oop); | |
| 106 } else if (oop instanceof TypeArray){ | |
| 107 return readPrimitiveArray((TypeArray)oop); | |
| 108 } else if (oop instanceof ObjArray){ | |
| 109 return readObjectArray((ObjArray)oop); | |
| 110 } else { | |
| 111 return null; | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 protected final Object getDefaultPrimitiveValue(Class clz) { | |
| 116 if (clz == Boolean.TYPE) { | |
| 117 return Boolean.FALSE; | |
| 118 } else if (clz == Character.TYPE) { | |
| 119 return new Character(' '); | |
| 120 } else if (clz == Byte.TYPE) { | |
| 121 return new Byte((byte) 0); | |
| 122 } else if (clz == Short.TYPE) { | |
| 123 return new Short((short) 0); | |
| 124 } else if (clz == Integer.TYPE) { | |
| 125 return new Integer(0); | |
| 126 } else if (clz == Long.TYPE) { | |
| 127 return new Long(0L); | |
| 128 } else if (clz == Float.TYPE) { | |
| 129 return new Float(0.0f); | |
| 130 } else if (clz == Double.TYPE) { | |
| 131 return new Double(0.0); | |
| 132 } else { | |
| 133 throw new RuntimeException("should not reach here!"); | |
| 134 } | |
| 135 } | |
| 136 | |
| 137 protected Symbol javaLangString; | |
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138 protected Symbol javaUtilHashtableEntry; |
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139 protected Symbol javaUtilHashtable; |
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140 protected Symbol javaUtilProperties; |
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141 |
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142 protected Symbol getVMSymbol(String name) { |
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143 return VM.getVM().getSymbolTable().probe(name); |
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144 } |
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145 |
| 0 | 146 protected Symbol javaLangString() { |
| 147 if (javaLangString == null) { | |
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148 javaLangString = getVMSymbol("java/lang/String"); |
| 0 | 149 } |
| 150 return javaLangString; | |
| 151 } | |
| 152 | |
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153 protected Symbol javaUtilHashtableEntry() { |
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154 if (javaUtilHashtableEntry == null) { |
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155 javaUtilHashtableEntry = getVMSymbol("java/util/Hashtable$Entry"); |
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156 } |
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157 return javaUtilHashtableEntry; |
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158 } |
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159 |
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160 protected Symbol javaUtilHashtable() { |
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161 if (javaUtilHashtable == null) { |
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162 javaUtilHashtable = getVMSymbol("java/util/Hashtable"); |
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163 } |
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164 return javaUtilHashtable; |
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165 } |
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166 |
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167 protected Symbol javaUtilProperties() { |
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168 if (javaUtilProperties == null) { |
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169 javaUtilProperties = getVMSymbol("java/util/Properties"); |
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170 } |
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171 return javaUtilProperties; |
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172 } |
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173 |
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174 private void setHashtableEntry(java.util.Hashtable p, Oop oop) { |
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175 InstanceKlass ik = (InstanceKlass)oop.getKlass(); |
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176 OopField keyField = (OopField)ik.findField("key", "Ljava/lang/Object;"); |
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177 OopField valueField = (OopField)ik.findField("value", "Ljava/lang/Object;"); |
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178 OopField nextField = (OopField)ik.findField("next", "Ljava/util/Hashtable$Entry;"); |
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179 if (DEBUG) { |
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180 if (Assert.ASSERTS_ENABLED) { |
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181 Assert.that(ik.getName().equals(javaUtilHashtableEntry()), "Not a Hashtable$Entry?"); |
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182 Assert.that(keyField != null && valueField != null && nextField != null, "Invalid fields!"); |
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183 } |
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184 } |
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185 |
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186 Object key = null; |
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187 Object value = null; |
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188 Oop next = null; |
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189 try { |
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190 key = readObject(keyField.getValue(oop)); |
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191 value = readObject(valueField.getValue(oop)); |
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192 next = (Oop)nextField.getValue(oop); |
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193 // For Properties, should use setProperty(k, v). Since it only runs in SA |
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194 // using put(k, v) should be OK. |
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195 p.put(key, value); |
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196 if (next != null) { |
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197 setHashtableEntry(p, next); |
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198 } |
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199 } catch (ClassNotFoundException ce) { |
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200 if( DEBUG) { |
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201 debugPrintln("Class not found " + ce); |
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202 debugPrintStackTrace(ce); |
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203 } |
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204 } |
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205 } |
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206 |
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207 protected Object getHashtable(Instance oop, boolean isProperties) { |
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208 InstanceKlass k = (InstanceKlass)oop.getKlass(); |
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209 OopField tableField = (OopField)k.findField("table", "[Ljava/util/Hashtable$Entry;"); |
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210 if (tableField == null) { |
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211 debugPrintln("Could not find field of [Ljava/util/Hashtable$Entry;"); |
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212 return null; |
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213 } |
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214 java.util.Hashtable table = (isProperties) ? new java.util.Properties() |
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215 : new java.util.Hashtable(); |
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216 ObjArray kvs = (ObjArray)tableField.getValue(oop); |
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217 long size = kvs.getLength(); |
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218 debugPrintln("Hashtable$Entry Size = " + size); |
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219 for (long i=0; i<size; i++) { |
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220 Oop entry = kvs.getObjAt(i); |
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221 if (entry != null && entry.isInstance()) { |
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222 setHashtableEntry(table, entry); |
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223 } |
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224 } |
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225 return table; |
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226 } |
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227 |
| 0 | 228 public Object readInstance(Instance oop) throws ClassNotFoundException { |
| 229 Object result = getFromObjTable(oop); | |
| 230 if (result == null) { | |
| 231 InstanceKlass kls = (InstanceKlass) oop.getKlass(); | |
| 232 // Handle java.lang.String instances differently. As part of JSR-133, fields of immutable | |
| 233 // classes have been made final. The algorithm below will not be able to read Strings from | |
| 234 // debuggee (can't use reflection to set final fields). But, need to read Strings is very | |
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235 // important. |
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236 // Same for Hashtable, key and hash are final, could not be set in the algorithm too. |
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237 // FIXME: need a framework to handle many other special cases. |
| 0 | 238 if (kls.getName().equals(javaLangString())) { |
| 239 return OopUtilities.stringOopToString(oop); | |
| 240 } | |
| 241 | |
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242 if (kls.getName().equals(javaUtilHashtable())) { |
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243 return getHashtable(oop, false); |
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244 } |
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245 |
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246 if (kls.getName().equals(javaUtilProperties())) { |
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247 return getHashtable(oop, true); |
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248 } |
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249 |
| 0 | 250 Class clz = readClass(kls); |
| 251 try { | |
| 252 result = clz.newInstance(); | |
| 253 } catch (Exception ex) { | |
| 254 // no-arg constructor failed to create object. Let us try | |
| 255 // to call constructors one-by-one with default arguments | |
| 256 // (null for objects, 0/0.0 etc. for primitives) till we | |
| 257 // succeed or fail on all constructors. | |
| 258 | |
| 259 java.lang.reflect.Constructor[] ctrs = clz.getDeclaredConstructors(); | |
| 260 for (int n = 0; n < ctrs.length; n++) { | |
| 261 java.lang.reflect.Constructor c = ctrs[n]; | |
| 262 Class[] paramTypes = c.getParameterTypes(); | |
| 263 Object[] params = new Object[paramTypes.length]; | |
| 264 for (int i = 0; i < params.length; i++) { | |
| 265 if (paramTypes[i].isPrimitive()) { | |
| 266 params[i] = getDefaultPrimitiveValue(paramTypes[i]); | |
| 267 } | |
| 268 } | |
| 269 try { | |
| 270 c.setAccessible(true); | |
| 271 result = c.newInstance(params); | |
| 272 break; | |
| 273 } catch (Exception exp) { | |
| 274 if (DEBUG) { | |
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275 debugPrintln("Can't create object using " + c); |
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276 debugPrintStackTrace(exp); |
| 0 | 277 } |
| 278 } | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 if (result != null) { | |
| 283 putIntoObjTable(oop, result); | |
| 284 oop.iterate(new FieldSetter(result), false); | |
| 285 } | |
| 286 } | |
| 287 return result; | |
| 288 } | |
| 289 | |
| 290 public Object readPrimitiveArray(final TypeArray array) { | |
| 291 | |
| 292 Object result = getFromObjTable(array); | |
| 293 if (result == null) { | |
| 294 int length = (int) array.getLength(); | |
| 295 TypeArrayKlass klass = (TypeArrayKlass) array.getKlass(); | |
| 296 int type = (int) klass.getElementType(); | |
| 297 switch (type) { | |
| 298 case TypeArrayKlass.T_BOOLEAN: { | |
| 299 final boolean[] arrayObj = new boolean[length]; | |
| 300 array.iterate(new DefaultOopVisitor() { | |
| 301 public void doBoolean(BooleanField field, boolean isVMField) { | |
| 302 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 303 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 304 } | |
| 305 }, false); | |
| 306 result = arrayObj; | |
| 307 } | |
| 308 break; | |
| 309 | |
| 310 case TypeArrayKlass.T_CHAR: { | |
| 311 final char[] arrayObj = new char[length]; | |
| 312 array.iterate(new DefaultOopVisitor() { | |
| 313 public void doChar(CharField field, boolean isVMField) { | |
| 314 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 315 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 316 } | |
| 317 }, false); | |
| 318 result = arrayObj; | |
| 319 } | |
| 320 break; | |
| 321 | |
| 322 case TypeArrayKlass.T_FLOAT: { | |
| 323 final float[] arrayObj = new float[length]; | |
| 324 array.iterate(new DefaultOopVisitor() { | |
| 325 public void doFloat(FloatField field, boolean isVMField) { | |
| 326 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 327 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 328 } | |
| 329 }, false); | |
| 330 result = arrayObj; | |
| 331 } | |
| 332 break; | |
| 333 | |
| 334 case TypeArrayKlass.T_DOUBLE: { | |
| 335 final double[] arrayObj = new double[length]; | |
| 336 array.iterate(new DefaultOopVisitor() { | |
| 337 public void doDouble(DoubleField field, boolean isVMField) { | |
| 338 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 339 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 340 } | |
| 341 }, false); | |
| 342 result = arrayObj; | |
| 343 } | |
| 344 break; | |
| 345 | |
| 346 case TypeArrayKlass.T_BYTE: { | |
| 347 final byte[] arrayObj = new byte[length]; | |
| 348 array.iterate(new DefaultOopVisitor() { | |
| 349 public void doByte(ByteField field, boolean isVMField) { | |
| 350 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 351 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 352 } | |
| 353 }, false); | |
| 354 result = arrayObj; | |
| 355 } | |
| 356 break; | |
| 357 | |
| 358 case TypeArrayKlass.T_SHORT: { | |
| 359 final short[] arrayObj = new short[length]; | |
| 360 array.iterate(new DefaultOopVisitor() { | |
| 361 public void doShort(ShortField field, boolean isVMField) { | |
| 362 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 363 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 364 } | |
| 365 }, false); | |
| 366 result = arrayObj; | |
| 367 } | |
| 368 break; | |
| 369 | |
| 370 case TypeArrayKlass.T_INT: { | |
| 371 final int[] arrayObj = new int[length]; | |
| 372 array.iterate(new DefaultOopVisitor() { | |
| 373 public void doInt(IntField field, boolean isVMField) { | |
| 374 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 375 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 376 } | |
| 377 }, false); | |
| 378 result = arrayObj; | |
| 379 } | |
| 380 break; | |
| 381 | |
| 382 case TypeArrayKlass.T_LONG: { | |
| 383 final long[] arrayObj = new long[length]; | |
| 384 array.iterate(new DefaultOopVisitor() { | |
| 385 public void doLong(LongField field, boolean isVMField) { | |
| 386 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 387 arrayObj[ifd.getIndex()] = field.getValue(array); | |
| 388 } | |
| 389 }, false); | |
| 390 result = arrayObj; | |
| 391 } | |
| 392 break; | |
| 393 | |
| 394 default: | |
| 395 throw new RuntimeException("should not reach here!"); | |
| 396 } | |
| 397 | |
| 398 putIntoObjTable(array, result); | |
| 399 } | |
| 400 return result; | |
| 401 } | |
| 402 | |
| 403 protected final boolean isRobust(OopHandle handle) { | |
| 404 return RobustOopDeterminator.oopLooksValid(handle); | |
| 405 } | |
| 406 | |
| 407 public Object readObjectArray(final ObjArray array) throws ClassNotFoundException { | |
| 408 Object result = getFromObjTable(array); | |
| 409 if (result == null) { | |
| 410 int length = (int) array.getLength(); | |
| 411 ObjArrayKlass klass = (ObjArrayKlass) array.getKlass(); | |
| 412 Klass bottomKls = klass.getBottomKlass(); | |
| 413 Class bottomCls = null; | |
| 414 final int dimension = (int) klass.getDimension(); | |
| 415 int[] dimArray = null; | |
| 416 if (bottomKls instanceof InstanceKlass) { | |
| 417 bottomCls = readClass((InstanceKlass) bottomKls); | |
| 418 dimArray = new int[dimension]; | |
| 419 } else { // instanceof TypeArrayKlass | |
| 420 TypeArrayKlass botKls = (TypeArrayKlass) bottomKls; | |
| 421 dimArray = new int[dimension -1]; | |
| 422 } | |
| 423 // initialize the length | |
| 424 dimArray[0] = length; | |
| 425 final Object[] arrayObj = (Object[]) java.lang.reflect.Array.newInstance(bottomCls, dimArray); | |
| 426 putIntoObjTable(array, arrayObj); | |
| 427 result = arrayObj; | |
| 428 array.iterate(new DefaultOopVisitor() { | |
| 429 public void doOop(OopField field, boolean isVMField) { | |
| 430 OopHandle handle = field.getValueAsOopHandle(getObj()); | |
| 431 if (! isRobust(handle)) { | |
| 432 return; | |
| 433 } | |
| 434 | |
| 435 IndexableFieldIdentifier ifd = (IndexableFieldIdentifier) field.getID(); | |
| 436 try { | |
| 437 arrayObj[ifd.getIndex()] = readObject(field.getValue(getObj())); | |
| 438 } catch (Exception e) { | |
| 439 if (DEBUG) { | |
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440 debugPrintln("Array element set failed for " + ifd); |
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441 debugPrintStackTrace(e); |
| 0 | 442 } |
| 443 } | |
| 444 } | |
| 445 }, false); | |
| 446 } | |
| 447 return result; | |
| 448 } | |
| 449 | |
| 450 protected class FieldSetter extends DefaultOopVisitor { | |
| 451 protected Object obj; | |
| 452 | |
| 453 public FieldSetter(Object obj) { | |
| 454 this.obj = obj; | |
| 455 } | |
| 456 | |
| 457 private void printFieldSetError(java.lang.reflect.Field f, Exception ex) { | |
| 458 if (DEBUG) { | |
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459 if (f != null) debugPrintln("Field set failed for " + f); |
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460 debugPrintStackTrace(ex); |
| 0 | 461 } |
| 462 } | |
| 463 | |
| 464 // Callback methods for each field type in an object | |
| 465 public void doOop(OopField field, boolean isVMField) { | |
| 466 OopHandle handle = field.getValueAsOopHandle(getObj()); | |
| 467 if (! isRobust(handle) ) { | |
| 468 return; | |
| 469 } | |
| 470 | |
| 471 java.lang.reflect.Field f = null; | |
| 472 try { | |
| 473 f = readField(field); | |
| 474 if (Modifier.isFinal(f.getModifiers())) return; | |
| 475 f.setAccessible(true); | |
| 476 f.set(obj, readObject(field.getValue(getObj()))); | |
| 477 } catch (Exception ex) { | |
| 478 printFieldSetError(f, ex); | |
| 479 } | |
| 480 } | |
| 481 | |
| 482 public void doByte(ByteField field, boolean isVMField) { | |
| 483 java.lang.reflect.Field f = null; | |
| 484 try { | |
| 485 f = readField(field); | |
| 486 if (Modifier.isFinal(f.getModifiers())) return; | |
| 487 f.setAccessible(true); | |
| 488 f.setByte(obj, field.getValue(getObj())); | |
| 489 } catch (Exception ex) { | |
| 490 printFieldSetError(f, ex); | |
| 491 } | |
| 492 } | |
| 493 | |
| 494 public void doChar(CharField field, boolean isVMField) { | |
| 495 java.lang.reflect.Field f = null; | |
| 496 try { | |
| 497 f = readField(field); | |
| 498 if (Modifier.isFinal(f.getModifiers())) return; | |
| 499 f.setAccessible(true); | |
| 500 f.setChar(obj, field.getValue(getObj())); | |
| 501 } catch (Exception ex) { | |
| 502 printFieldSetError(f, ex); | |
| 503 } | |
| 504 } | |
| 505 | |
| 506 public void doBoolean(BooleanField field, boolean isVMField) { | |
| 507 java.lang.reflect.Field f = null; | |
| 508 try { | |
| 509 f = readField(field); | |
| 510 if (Modifier.isFinal(f.getModifiers())) return; | |
| 511 f.setAccessible(true); | |
| 512 f.setBoolean(obj, field.getValue(getObj())); | |
| 513 } catch (Exception ex) { | |
| 514 printFieldSetError(f, ex); | |
| 515 } | |
| 516 } | |
| 517 | |
| 518 public void doShort(ShortField field, boolean isVMField) { | |
| 519 java.lang.reflect.Field f = null; | |
| 520 try { | |
| 521 f = readField(field); | |
| 522 if (Modifier.isFinal(f.getModifiers())) return; | |
| 523 f.setAccessible(true); | |
| 524 f.setShort(obj, field.getValue(getObj())); | |
| 525 } catch (Exception ex) { | |
| 526 printFieldSetError(f, ex); | |
| 527 } | |
| 528 } | |
| 529 | |
| 530 public void doInt(IntField field, boolean isVMField) { | |
| 531 java.lang.reflect.Field f = null; | |
| 532 try { | |
| 533 f = readField(field); | |
| 534 if (Modifier.isFinal(f.getModifiers())) return; | |
| 535 f.setAccessible(true); | |
| 536 f.setInt(obj, field.getValue(getObj())); | |
| 537 } catch (Exception ex) { | |
| 538 printFieldSetError(f, ex); | |
| 539 } | |
| 540 } | |
| 541 | |
| 542 public void doLong(LongField field, boolean isVMField) { | |
| 543 java.lang.reflect.Field f = null; | |
| 544 try { | |
| 545 f = readField(field); | |
| 546 if (Modifier.isFinal(f.getModifiers())) return; | |
| 547 f.setAccessible(true); | |
| 548 f.setLong(obj, field.getValue(getObj())); | |
| 549 } catch (Exception ex) { | |
| 550 printFieldSetError(f, ex); | |
| 551 } | |
| 552 } | |
| 553 | |
| 554 public void doFloat(FloatField field, boolean isVMField) { | |
| 555 java.lang.reflect.Field f = null; | |
| 556 try { | |
| 557 f = readField(field); | |
| 558 if (Modifier.isFinal(f.getModifiers())) return; | |
| 559 f.setAccessible(true); | |
| 560 f.setFloat(obj, field.getValue(getObj())); | |
| 561 } catch (Exception ex) { | |
| 562 printFieldSetError(f, ex); | |
| 563 } | |
| 564 } | |
| 565 | |
| 566 public void doDouble(DoubleField field, boolean isVMField) { | |
| 567 java.lang.reflect.Field f = null; | |
| 568 try { | |
| 569 f = readField(field); | |
| 570 if (Modifier.isFinal(f.getModifiers())) return; | |
| 571 f.setAccessible(true); | |
| 572 f.setDouble(obj, field.getValue(getObj())); | |
| 573 } catch (Exception ex) { | |
| 574 printFieldSetError(f, ex); | |
| 575 } | |
| 576 } | |
| 577 | |
| 578 public void doCInt(CIntField field, boolean isVMField) { | |
| 579 throw new RuntimeException("should not reach here!"); | |
| 580 } | |
| 581 } | |
| 582 | |
| 583 public Class readClass(InstanceKlass kls) throws ClassNotFoundException { | |
| 584 Class cls = (Class) getFromObjTable(kls); | |
| 585 if (cls == null) { | |
| 586 cls = Class.forName(kls.getName().asString().replace('/', '.'), true, cl); | |
| 587 putIntoObjTable(kls, cls); | |
| 588 } | |
| 589 return cls; | |
| 590 } | |
| 591 | |
| 592 public Object readMethodOrConstructor(sun.jvm.hotspot.oops.Method m) | |
| 593 throws NoSuchMethodException, ClassNotFoundException { | |
| 594 String name = m.getName().asString(); | |
| 595 if (name.equals("<init>")) { | |
| 596 return readConstructor(m); | |
| 597 } else { | |
| 598 return readMethod(m); | |
| 599 } | |
| 600 } | |
| 601 | |
| 602 public java.lang.reflect.Method readMethod(sun.jvm.hotspot.oops.Method m) | |
| 603 throws NoSuchMethodException, ClassNotFoundException { | |
| 604 java.lang.reflect.Method result = (java.lang.reflect.Method) getFromObjTable(m); | |
| 605 if (result == null) { | |
| 606 Class clz = readClass((InstanceKlass)m.getMethodHolder()); | |
| 607 String name = m.getName().asString(); | |
| 608 Class[] paramTypes = getParamTypes(m.getSignature()); | |
| 609 result = clz.getMethod(name, paramTypes); | |
| 610 putIntoObjTable(m, result); | |
| 611 } | |
| 612 return result; | |
| 613 } | |
| 614 | |
| 615 public java.lang.reflect.Constructor readConstructor(sun.jvm.hotspot.oops.Method m) | |
| 616 throws NoSuchMethodException, ClassNotFoundException { | |
| 617 java.lang.reflect.Constructor result = (java.lang.reflect.Constructor) getFromObjTable(m); | |
| 618 if (result == null) { | |
| 619 Class clz = readClass((InstanceKlass)m.getMethodHolder()); | |
| 620 String name = m.getName().asString(); | |
| 621 Class[] paramTypes = getParamTypes(m.getSignature()); | |
| 622 result = clz.getDeclaredConstructor(paramTypes); | |
| 623 putIntoObjTable(m, result); | |
| 624 } | |
| 625 return result; | |
| 626 } | |
| 627 | |
| 628 public java.lang.reflect.Field readField(sun.jvm.hotspot.oops.Field f) | |
| 629 throws NoSuchFieldException, ClassNotFoundException { | |
| 630 java.lang.reflect.Field result = (java.lang.reflect.Field) fieldMap.get(f); | |
| 631 if (result == null) { | |
| 632 FieldIdentifier fieldId = f.getID(); | |
| 633 Class clz = readClass((InstanceKlass) f.getFieldHolder()); | |
| 634 String name = fieldId.getName(); | |
| 635 try { | |
| 636 result = clz.getField(name); | |
| 637 } catch (NoSuchFieldException nsfe) { | |
| 638 result = clz.getDeclaredField(name); | |
| 639 } | |
| 640 fieldMap.put(f, result); | |
| 641 } | |
| 642 return result; | |
| 643 } | |
| 644 | |
| 645 protected final ClassLoader cl; | |
| 646 protected Map oopToObjMap; // Map<Oop, Object> | |
| 647 protected Map fieldMap; // Map<sun.jvm.hotspot.oops.Field, java.lang.reflect.Field> | |
| 648 | |
| 649 protected void putIntoObjTable(Oop oop, Object obj) { | |
| 650 oopToObjMap.put(oop, obj); | |
| 651 } | |
| 652 | |
| 653 protected Object getFromObjTable(Oop oop) { | |
| 654 return oopToObjMap.get(oop); | |
| 655 } | |
| 656 | |
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657 protected void putIntoObjTable(Metadata oop, Object obj) { |
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658 oopToObjMap.put(oop, obj); |
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659 } |
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660 |
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661 protected Object getFromObjTable(Metadata oop) { |
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662 return oopToObjMap.get(oop); |
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663 } |
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664 |
| 0 | 665 protected class SignatureParser extends SignatureIterator { |
| 666 protected Vector tmp = new Vector(); // Vector<Class> | |
| 667 | |
| 668 public SignatureParser(Symbol s) { | |
| 669 super(s); | |
| 670 } | |
| 671 | |
| 672 public void doBool () { tmp.add(Boolean.TYPE); } | |
| 673 public void doChar () { tmp.add(Character.TYPE); } | |
| 674 public void doFloat () { tmp.add(Float.TYPE); } | |
| 675 public void doDouble() { tmp.add(Double.TYPE); } | |
| 676 public void doByte () { tmp.add(Byte.TYPE); } | |
| 677 public void doShort () { tmp.add(Short.TYPE); } | |
| 678 public void doInt () { tmp.add(Integer.TYPE); } | |
| 679 public void doLong () { tmp.add(Long.TYPE); } | |
| 680 public void doVoid () { | |
| 681 if(isReturnType()) { | |
| 682 tmp.add(Void.TYPE); | |
| 683 } else { | |
| 684 throw new RuntimeException("should not reach here"); | |
| 685 } | |
| 686 } | |
| 687 | |
| 688 public void doObject(int begin, int end) { | |
| 689 tmp.add(getClass(begin, end)); | |
| 690 } | |
| 691 | |
| 692 public void doArray (int begin, int end) { | |
| 693 int inner = arrayInnerBegin(begin); | |
| 694 Class elemCls = null; | |
| 695 switch (_signature.getByteAt(inner)) { | |
| 696 case 'B': elemCls = Boolean.TYPE; break; | |
| 697 case 'C': elemCls = Character.TYPE; break; | |
| 698 case 'D': elemCls = Double.TYPE; break; | |
| 699 case 'F': elemCls = Float.TYPE; break; | |
| 700 case 'I': elemCls = Integer.TYPE; break; | |
| 701 case 'J': elemCls = Long.TYPE; break; | |
| 702 case 'S': elemCls = Short.TYPE; break; | |
| 703 case 'Z': elemCls = Boolean.TYPE; break; | |
| 704 case 'L': elemCls = getClass(inner + 1, end); break; | |
| 705 default: break; | |
| 706 } | |
| 707 | |
| 708 int dimension = inner - begin; | |
| 709 // create 0 x 0 ... array and get class from that | |
| 710 int[] dimArray = new int[dimension]; | |
| 711 tmp.add(java.lang.reflect.Array.newInstance(elemCls, dimArray).getClass()); | |
| 712 } | |
| 713 | |
| 714 protected Class getClass(int begin, int end) { | |
| 715 String className = getClassName(begin, end); | |
| 716 try { | |
| 717 return Class.forName(className, true, cl); | |
| 718 } catch (Exception e) { | |
| 719 if (DEBUG) { | |
|
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changeset
|
720 debugPrintln("Can't load class " + className); |
| 0 | 721 } |
| 722 throw new RuntimeException(e); | |
| 723 } | |
| 724 } | |
| 725 | |
| 726 protected String getClassName(int begin, int end) { | |
| 727 StringBuffer buf = new StringBuffer(); | |
| 728 for (int i = begin; i < end; i++) { | |
| 729 char c = (char) (_signature.getByteAt(i) & 0xFF); | |
| 730 if (c == '/') { | |
| 731 buf.append('.'); | |
| 732 } else { | |
| 733 buf.append(c); | |
| 734 } | |
| 735 } | |
| 736 return buf.toString(); | |
| 737 } | |
| 738 | |
| 739 protected int arrayInnerBegin(int begin) { | |
| 740 while (_signature.getByteAt(begin) == '[') { | |
| 741 ++begin; | |
| 742 } | |
| 743 return begin; | |
| 744 } | |
| 745 | |
| 746 public int getNumParams() { | |
| 747 return tmp.size(); | |
| 748 } | |
| 749 | |
| 750 public Enumeration getParamTypes() { | |
| 751 return tmp.elements(); | |
| 752 } | |
| 753 } | |
| 754 | |
| 755 protected Class[] getParamTypes(Symbol signature) { | |
| 756 SignatureParser sp = new SignatureParser(signature); | |
| 757 sp.iterateParameters(); | |
| 758 Class result[] = new Class[sp.getNumParams()]; | |
| 759 Enumeration e = sp.getParamTypes(); | |
| 760 int i = 0; | |
| 761 while (e.hasMoreElements()) { | |
| 762 result[i] = (Class) e.nextElement(); | |
| 763 i++; | |
| 764 } | |
| 765 return result; | |
| 766 } | |
| 767 } |