Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/HotSpotTypeDataBase.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 | f6f3bb0ee072 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 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; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.types.*; | |
| 31 import sun.jvm.hotspot.types.basic.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
| 34 /** <P> This is the cross-platform TypeDataBase used by the Oop | |
| 35 hierarchy. The decision was made to make this cross-platform by | |
| 36 having the VM export the necessary symbols via a built-in table; | |
| 37 see src/share/vm/runtime/vmStructs.[ch]pp for more details. </P> | |
| 38 | |
| 39 <P> <B>WARNING</B>: clients should refer to this class through the | |
| 40 TypeDataBase interface and not directly to the HotSpotTypeDataBase | |
| 41 type. </P> | |
| 42 | |
| 43 <P> NOTE: since we are fetching the sizes of the Java primitive types | |
| 44 */ | |
| 45 | |
| 46 public class HotSpotTypeDataBase extends BasicTypeDataBase { | |
| 47 private Debugger symbolLookup; | |
| 48 private String[] jvmLibNames; | |
| 49 private static final int UNINITIALIZED_SIZE = -1; | |
| 50 private static final int C_INT8_SIZE = 1; | |
| 51 private static final int C_INT32_SIZE = 4; | |
| 52 private static final int C_INT64_SIZE = 8; | |
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53 private static int pointerSize = UNINITIALIZED_SIZE; |
| 0 | 54 |
| 55 private static final boolean DEBUG; | |
| 56 static { | |
| 57 DEBUG = System.getProperty("sun.jvm.hotspot.HotSpotTypeDataBase.DEBUG") | |
| 58 != null; | |
| 59 } | |
| 60 | |
| 61 /** <P> This requires a SymbolLookup mechanism as well as the | |
| 62 MachineDescription. Note that we do not need a NameMangler since | |
| 63 we use the vmStructs mechanism to avoid looking up C++ | |
| 64 symbols. </P> | |
| 65 | |
| 66 <P> NOTE that it is guaranteed that this constructor will not | |
| 67 attempt to fetch any Java values from the remote process, only C | |
| 68 integers and addresses. This is required because we are fetching | |
| 69 the sizes of the Java primitive types from the remote process, | |
| 70 implying that attempting to fetch them before their sizes are | |
| 71 known is illegal. </P> | |
| 72 | |
| 73 <P> Throws NoSuchSymbolException if a problem occurred while | |
| 74 looking up one of the bootstrapping symbols related to the | |
| 75 VMStructs table in the remote VM; this may indicate that the | |
| 76 remote process is not actually a HotSpot VM. </P> | |
| 77 */ | |
| 78 public HotSpotTypeDataBase(MachineDescription machDesc, | |
| 79 VtblAccess vtblAccess, | |
| 80 Debugger symbolLookup, | |
| 81 String[] jvmLibNames) throws NoSuchSymbolException { | |
| 82 super(machDesc, vtblAccess); | |
| 83 this.symbolLookup = symbolLookup; | |
| 84 this.jvmLibNames = jvmLibNames; | |
| 85 | |
| 86 readVMTypes(); | |
| 87 initializePrimitiveTypes(); | |
| 88 readVMStructs(); | |
| 89 readVMIntConstants(); | |
| 90 readVMLongConstants(); | |
| 3939 | 91 readExternalDefinitions(); |
| 0 | 92 } |
| 93 | |
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94 public Type lookupType(String cTypeName, boolean throwException) { |
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95 Type fieldType = super.lookupType(cTypeName, false); |
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96 if (fieldType == null && cTypeName.startsWith("const ")) { |
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97 fieldType = (BasicType)lookupType(cTypeName.substring(6), false); |
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98 } |
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99 if (fieldType == null && cTypeName.endsWith(" const")) { |
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100 fieldType = (BasicType)lookupType(cTypeName.substring(0, cTypeName.length() - 6), false); |
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101 } |
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102 if (fieldType == null) { |
| 3939 | 103 if (cTypeName.startsWith("GrowableArray<") && cTypeName.endsWith(">")) { |
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104 String ttype = cTypeName.substring("GrowableArray<".length(), |
| 3939 | 105 cTypeName.length() - 1); |
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106 Type templateType = lookupType(ttype, false); |
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107 if (templateType == null && typeNameIsPointerType(ttype)) { |
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108 templateType = recursiveCreateBasicPointerType(ttype); |
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109 } |
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110 if (templateType == null) { |
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111 lookupOrFail(ttype); |
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112 } |
| 3939 | 113 |
| 114 BasicType basicTargetType = createBasicType(cTypeName, false, false, false); | |
| 115 | |
| 116 // transfer fields from GenericGrowableArray to template instance | |
| 117 BasicType generic = lookupOrFail("GenericGrowableArray"); | |
| 118 BasicType specific = lookupOrFail("GrowableArray<int>"); | |
| 119 basicTargetType.setSize(specific.getSize()); | |
| 120 Iterator fields = generic.getFields(); | |
| 121 while (fields.hasNext()) { | |
| 122 Field f = (Field)fields.next(); | |
| 123 basicTargetType.addField(internalCreateField(basicTargetType, f.getName(), | |
| 124 f.getType(), f.isStatic(), | |
| 125 f.getOffset(), null)); | |
| 126 } | |
| 127 fieldType = basicTargetType; | |
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128 } |
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129 } |
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130 if (fieldType == null && typeNameIsPointerType(cTypeName)) { |
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131 fieldType = recursiveCreateBasicPointerType(cTypeName); |
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132 } |
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133 if (fieldType == null && throwException) { |
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134 super.lookupType(cTypeName, true); |
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135 } |
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136 return fieldType; |
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137 } |
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138 |
| 0 | 139 private void readVMTypes() { |
| 140 // Get the variables we need in order to traverse the VMTypeEntry[] | |
| 141 long typeEntryTypeNameOffset; | |
| 142 long typeEntrySuperclassNameOffset; | |
| 143 long typeEntryIsOopTypeOffset; | |
| 144 long typeEntryIsIntegerTypeOffset; | |
| 145 long typeEntryIsUnsignedOffset; | |
| 146 long typeEntrySizeOffset; | |
| 147 long typeEntryArrayStride; | |
| 148 | |
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149 // Fetch the address of the VMTypeEntry*. We get this symbol first |
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150 // and try to use it to make sure that symbol lookup is working. |
| 0 | 151 Address entryAddr = lookupInProcess("gHotSpotVMTypes"); |
| 152 // System.err.println("gHotSpotVMTypes address = " + entryAddr); | |
| 153 // Dereference this once to get the pointer to the first VMTypeEntry | |
| 154 // dumpMemory(entryAddr, 80); | |
| 155 entryAddr = entryAddr.getAddressAt(0); | |
| 156 | |
| 157 if (entryAddr == null) { | |
| 158 throw new RuntimeException("gHotSpotVMTypes was not initialized properly in the remote process; can not continue"); | |
| 159 } | |
| 160 | |
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161 typeEntryTypeNameOffset = getLongValueFromProcess("gHotSpotVMTypeEntryTypeNameOffset"); |
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162 typeEntrySuperclassNameOffset = getLongValueFromProcess("gHotSpotVMTypeEntrySuperclassNameOffset"); |
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163 typeEntryIsOopTypeOffset = getLongValueFromProcess("gHotSpotVMTypeEntryIsOopTypeOffset"); |
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164 typeEntryIsIntegerTypeOffset = getLongValueFromProcess("gHotSpotVMTypeEntryIsIntegerTypeOffset"); |
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165 typeEntryIsUnsignedOffset = getLongValueFromProcess("gHotSpotVMTypeEntryIsUnsignedOffset"); |
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166 typeEntrySizeOffset = getLongValueFromProcess("gHotSpotVMTypeEntrySizeOffset"); |
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167 typeEntryArrayStride = getLongValueFromProcess("gHotSpotVMTypeEntryArrayStride"); |
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168 |
| 0 | 169 // Start iterating down it until we find an entry with no name |
| 170 Address typeNameAddr = null; | |
| 171 do { | |
| 172 // Fetch the type name first | |
| 173 typeNameAddr = entryAddr.getAddressAt(typeEntryTypeNameOffset); | |
| 174 if (typeNameAddr != null) { | |
| 175 String typeName = CStringUtilities.getString(typeNameAddr); | |
| 176 | |
| 177 String superclassName = null; | |
| 178 Address superclassNameAddr = entryAddr.getAddressAt(typeEntrySuperclassNameOffset); | |
| 179 if (superclassNameAddr != null) { | |
| 180 superclassName = CStringUtilities.getString(superclassNameAddr); | |
| 181 } | |
| 182 | |
| 183 boolean isOopType = (entryAddr.getCIntegerAt(typeEntryIsOopTypeOffset, C_INT32_SIZE, false) != 0); | |
| 184 boolean isIntegerType = (entryAddr.getCIntegerAt(typeEntryIsIntegerTypeOffset, C_INT32_SIZE, false) != 0); | |
| 185 boolean isUnsigned = (entryAddr.getCIntegerAt(typeEntryIsUnsignedOffset, C_INT32_SIZE, false) != 0); | |
| 186 long size = entryAddr.getCIntegerAt(typeEntrySizeOffset, C_INT64_SIZE, true); | |
| 187 | |
| 188 createType(typeName, superclassName, isOopType, isIntegerType, isUnsigned, size); | |
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189 if (pointerSize == UNINITIALIZED_SIZE && typeName.equals("void*")) { |
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190 pointerSize = (int)size; |
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191 } |
| 0 | 192 } |
| 193 | |
| 194 entryAddr = entryAddr.addOffsetTo(typeEntryArrayStride); | |
| 195 } while (typeNameAddr != null); | |
| 196 } | |
| 197 | |
| 198 private void initializePrimitiveTypes() { | |
| 199 // Look up the needed primitive types by name...they had better be present | |
| 200 setJBooleanType(lookupPrimitiveType("jboolean")); | |
| 201 setJByteType (lookupPrimitiveType("jbyte")); | |
| 202 setJCharType (lookupPrimitiveType("jchar")); | |
| 203 setJDoubleType (lookupPrimitiveType("jdouble")); | |
| 204 setJFloatType (lookupPrimitiveType("jfloat")); | |
| 205 setJIntType (lookupPrimitiveType("jint")); | |
| 206 setJLongType (lookupPrimitiveType("jlong")); | |
| 207 setJShortType (lookupPrimitiveType("jshort")); | |
| 208 | |
| 209 // Indicate that these are the Java primitive types | |
| 210 ((BasicType) getJBooleanType()).setIsJavaPrimitiveType(true); | |
| 211 ((BasicType) getJByteType()).setIsJavaPrimitiveType(true); | |
| 212 ((BasicType) getJCharType()).setIsJavaPrimitiveType(true); | |
| 213 ((BasicType) getJDoubleType()).setIsJavaPrimitiveType(true); | |
| 214 ((BasicType) getJFloatType()).setIsJavaPrimitiveType(true); | |
| 215 ((BasicType) getJIntType()).setIsJavaPrimitiveType(true); | |
| 216 ((BasicType) getJLongType()).setIsJavaPrimitiveType(true); | |
| 217 ((BasicType) getJShortType()).setIsJavaPrimitiveType(true); | |
| 218 } | |
| 219 | |
| 220 private Type lookupPrimitiveType(String typeName) { | |
| 221 Type type = lookupType(typeName, false); | |
| 222 if (type == null) { | |
| 223 throw new RuntimeException("Error initializing the HotSpotDataBase: could not find the primitive type \"" + | |
| 224 typeName + "\" in the remote VM's VMStructs table. This type is required in " + | |
| 225 "order to determine the size of Java primitive types. Can not continue."); | |
| 226 } | |
| 227 return type; | |
| 228 } | |
| 229 | |
| 3939 | 230 private void readExternalDefinitions() { |
| 231 String file = System.getProperty("sun.jvm.hotspot.typedb"); | |
| 232 if (file != null) { | |
| 233 System.out.println("Reading " + file); | |
| 234 BufferedReader in = null; | |
| 235 try { | |
| 236 StreamTokenizer t = new StreamTokenizer(in = new BufferedReader(new InputStreamReader(new FileInputStream(file)))); | |
| 237 t.resetSyntax(); | |
| 238 t.wordChars('\u0000','\uFFFF'); | |
| 239 t.whitespaceChars(' ', ' '); | |
| 240 t.whitespaceChars('\n', '\n'); | |
| 241 t.whitespaceChars('\r', '\r'); | |
| 242 t.quoteChar('\"'); | |
| 243 t.eolIsSignificant(true); | |
| 244 while (t.nextToken() != StreamTokenizer.TT_EOF) { | |
| 245 if (t.ttype == StreamTokenizer.TT_EOL) { | |
| 246 continue; | |
| 247 } | |
| 248 | |
| 249 if (t.sval.equals("field")) { | |
| 250 t.nextToken(); | |
| 251 BasicType containingType = (BasicType)lookupType(t.sval); | |
| 252 t.nextToken(); | |
| 253 String fieldName = t.sval; | |
| 254 | |
| 255 // The field's Type must already be in the database -- no exceptions | |
| 256 t.nextToken(); | |
| 257 Type fieldType = lookupType(t.sval); | |
| 258 t.nextToken(); | |
| 259 boolean isStatic = Boolean.valueOf(t.sval).booleanValue(); | |
| 260 t.nextToken(); | |
| 261 long offset = Long.parseLong(t.sval); | |
| 262 t.nextToken(); | |
| 263 Address staticAddress = null; | |
| 264 if (isStatic) { | |
| 265 throw new InternalError("static fields not supported"); | |
| 266 } | |
| 267 | |
| 268 // check to see if the field already exists | |
| 269 Iterator i = containingType.getFields(); | |
| 270 boolean defined = false; | |
| 271 while (i.hasNext()) { | |
| 272 Field f = (Field) i.next(); | |
| 273 if (f.getName().equals(fieldName)) { | |
| 274 if (f.isStatic() != isStatic) { | |
| 275 throw new RuntimeException("static/nonstatic mismatch: " + fieldName); | |
| 276 } | |
| 277 if (!isStatic) { | |
| 278 if (f.getOffset() != offset) { | |
| 279 throw new RuntimeException("bad redefinition of field offset: " + fieldName); | |
| 280 } | |
| 281 } else { | |
| 282 if (!f.getStaticFieldAddress().equals(staticAddress)) { | |
| 283 throw new RuntimeException("bad redefinition of field location: " + fieldName); | |
| 284 } | |
| 285 } | |
| 286 if (f.getType() != fieldType) { | |
| 287 System.out.println(fieldType); | |
| 288 System.out.println(f.getType()); | |
| 289 throw new RuntimeException("bad redefinition of field type: " + fieldName); | |
| 290 } | |
| 291 defined = true; | |
| 292 break; | |
| 293 } | |
| 294 } | |
| 295 | |
| 296 if (!defined) { | |
| 297 // Create field by type | |
| 298 createField(containingType, | |
| 299 fieldName, fieldType, | |
| 300 isStatic, | |
| 301 offset, | |
| 302 staticAddress); | |
| 303 } | |
| 304 } else if (t.sval.equals("type")) { | |
| 305 t.nextToken(); | |
| 306 String typeName = t.sval; | |
| 307 t.nextToken(); | |
| 308 String superclassName = t.sval; | |
| 309 if (superclassName.equals("null")) { | |
| 310 superclassName = null; | |
| 311 } | |
| 312 t.nextToken(); | |
| 313 boolean isOop = Boolean.valueOf(t.sval).booleanValue(); | |
| 314 t.nextToken(); | |
| 315 boolean isInteger = Boolean.valueOf(t.sval).booleanValue(); | |
| 316 t.nextToken(); | |
| 317 boolean isUnsigned = Boolean.valueOf(t.sval).booleanValue(); | |
| 318 t.nextToken(); | |
| 319 long size = Long.parseLong(t.sval); | |
| 320 | |
| 321 BasicType type = null; | |
| 322 try { | |
| 323 type = (BasicType)lookupType(typeName); | |
| 324 } catch (RuntimeException e) { | |
| 325 } | |
| 326 if (type != null) { | |
| 327 if (type.isOopType() != isOop) { | |
| 328 throw new RuntimeException("oop mismatch in type definition: " + typeName); | |
| 329 } | |
| 330 if (type.isCIntegerType() != isInteger) { | |
| 331 throw new RuntimeException("integer type mismatch in type definition: " + typeName); | |
| 332 } | |
| 333 if (type.isCIntegerType() && (((CIntegerType)type).isUnsigned()) != isUnsigned) { | |
| 334 throw new RuntimeException("unsigned mismatch in type definition: " + typeName); | |
| 335 } | |
| 336 if (type.getSuperclass() == null) { | |
| 337 if (superclassName != null) { | |
| 338 if (type.getSize() == -1) { | |
| 339 type.setSuperclass(lookupType(superclassName)); | |
| 340 } else { | |
| 341 throw new RuntimeException("unexpected superclass in type definition: " + typeName); | |
| 342 } | |
| 343 } | |
| 344 } else { | |
| 345 if (superclassName == null) { | |
| 346 throw new RuntimeException("missing superclass in type definition: " + typeName); | |
| 347 } | |
| 348 if (!type.getSuperclass().getName().equals(superclassName)) { | |
| 349 throw new RuntimeException("incorrect superclass in type definition: " + typeName); | |
| 350 } | |
| 351 } | |
| 352 if (type.getSize() != size) { | |
| 353 if (type.getSize() == -1 || type.getSize() == 0) { | |
| 354 type.setSize(size); | |
| 355 } else { | |
| 356 throw new RuntimeException("size mismatch in type definition: " + typeName + ": " + type.getSize() + " != " + size); | |
| 357 } | |
| 358 } | |
| 359 } | |
| 360 | |
| 361 if (lookupType(typeName, false) == null) { | |
| 362 // Create type | |
| 363 createType(typeName, superclassName, isOop, isInteger, isUnsigned, size); | |
| 364 } | |
| 365 } else { | |
| 366 throw new InternalError("\"" + t.sval + "\""); | |
| 367 } | |
| 368 } | |
| 369 } catch (IOException ioe) { | |
| 370 ioe.printStackTrace(); | |
| 371 } finally { | |
| 372 try { | |
| 373 in.close(); | |
| 374 } catch (Exception e) { | |
| 375 } | |
| 376 } | |
| 377 } | |
| 378 } | |
| 379 | |
| 0 | 380 private void readVMStructs() { |
| 381 // Get the variables we need in order to traverse the VMStructEntry[] | |
| 382 long structEntryTypeNameOffset; | |
| 383 long structEntryFieldNameOffset; | |
| 384 long structEntryTypeStringOffset; | |
| 385 long structEntryIsStaticOffset; | |
| 386 long structEntryOffsetOffset; | |
| 387 long structEntryAddressOffset; | |
| 388 long structEntryArrayStride; | |
| 389 | |
| 390 structEntryTypeNameOffset = getLongValueFromProcess("gHotSpotVMStructEntryTypeNameOffset"); | |
| 391 structEntryFieldNameOffset = getLongValueFromProcess("gHotSpotVMStructEntryFieldNameOffset"); | |
| 392 structEntryTypeStringOffset = getLongValueFromProcess("gHotSpotVMStructEntryTypeStringOffset"); | |
| 393 structEntryIsStaticOffset = getLongValueFromProcess("gHotSpotVMStructEntryIsStaticOffset"); | |
| 394 structEntryOffsetOffset = getLongValueFromProcess("gHotSpotVMStructEntryOffsetOffset"); | |
| 395 structEntryAddressOffset = getLongValueFromProcess("gHotSpotVMStructEntryAddressOffset"); | |
| 396 structEntryArrayStride = getLongValueFromProcess("gHotSpotVMStructEntryArrayStride"); | |
| 397 | |
| 398 // Fetch the address of the VMStructEntry* | |
| 399 Address entryAddr = lookupInProcess("gHotSpotVMStructs"); | |
| 400 // Dereference this once to get the pointer to the first VMStructEntry | |
| 401 entryAddr = entryAddr.getAddressAt(0); | |
| 402 if (entryAddr == null) { | |
| 403 throw new RuntimeException("gHotSpotVMStructs was not initialized properly in the remote process; can not continue"); | |
| 404 } | |
| 405 | |
| 406 // Start iterating down it until we find an entry with no name | |
| 407 Address fieldNameAddr = null; | |
| 408 String typeName = null; | |
| 409 String fieldName = null; | |
| 410 String typeString = null; | |
| 411 boolean isStatic = false; | |
| 412 long offset = 0; | |
| 413 Address staticFieldAddr = null; | |
| 414 long size = 0; | |
| 415 long index = 0; | |
| 416 String opaqueName = "<opaque>"; | |
| 417 lookupOrCreateClass(opaqueName, false, false, false); | |
| 418 | |
| 419 do { | |
| 420 // Fetch the field name first | |
| 421 fieldNameAddr = entryAddr.getAddressAt(structEntryFieldNameOffset); | |
| 422 if (fieldNameAddr != null) { | |
| 423 fieldName = CStringUtilities.getString(fieldNameAddr); | |
| 424 | |
| 425 // Now the rest of the names. Keep in mind that the type name | |
| 426 // may be NULL, indicating that the type is opaque. | |
| 427 Address addr = entryAddr.getAddressAt(structEntryTypeNameOffset); | |
| 428 if (addr == null) { | |
| 429 throw new RuntimeException("gHotSpotVMStructs unexpectedly had a NULL type name at index " + index); | |
| 430 } | |
| 431 typeName = CStringUtilities.getString(addr); | |
| 432 | |
| 433 addr = entryAddr.getAddressAt(structEntryTypeStringOffset); | |
| 434 if (addr == null) { | |
| 435 typeString = opaqueName; | |
| 436 } else { | |
| 437 typeString = CStringUtilities.getString(addr); | |
| 438 } | |
| 439 | |
| 440 isStatic = !(entryAddr.getCIntegerAt(structEntryIsStaticOffset, C_INT32_SIZE, false) == 0); | |
| 441 if (isStatic) { | |
| 442 staticFieldAddr = entryAddr.getAddressAt(structEntryAddressOffset); | |
| 443 offset = 0; | |
| 444 } else { | |
| 445 offset = entryAddr.getCIntegerAt(structEntryOffsetOffset, C_INT64_SIZE, true); | |
| 446 staticFieldAddr = null; | |
| 447 } | |
| 448 | |
| 449 // The containing Type must already be in the database -- no exceptions | |
| 450 BasicType containingType = lookupOrFail(typeName); | |
| 451 | |
| 452 // The field's Type must already be in the database -- no exceptions | |
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453 BasicType fieldType = (BasicType)lookupType(typeString); |
| 0 | 454 |
| 455 // Create field by type | |
| 456 createField(containingType, fieldName, fieldType, | |
| 457 isStatic, offset, staticFieldAddr); | |
| 458 } | |
| 459 | |
| 460 ++index; | |
| 461 entryAddr = entryAddr.addOffsetTo(structEntryArrayStride); | |
| 462 } while (fieldNameAddr != null); | |
| 463 } | |
| 464 | |
| 465 private void readVMIntConstants() { | |
| 466 // Get the variables we need in order to traverse the VMIntConstantEntry[] | |
| 467 long intConstantEntryNameOffset; | |
| 468 long intConstantEntryValueOffset; | |
| 469 long intConstantEntryArrayStride; | |
| 470 | |
| 471 intConstantEntryNameOffset = getLongValueFromProcess("gHotSpotVMIntConstantEntryNameOffset"); | |
| 472 intConstantEntryValueOffset = getLongValueFromProcess("gHotSpotVMIntConstantEntryValueOffset"); | |
| 473 intConstantEntryArrayStride = getLongValueFromProcess("gHotSpotVMIntConstantEntryArrayStride"); | |
| 474 | |
| 475 // Fetch the address of the VMIntConstantEntry* | |
| 476 Address entryAddr = lookupInProcess("gHotSpotVMIntConstants"); | |
| 477 // Dereference this once to get the pointer to the first VMIntConstantEntry | |
| 478 entryAddr = entryAddr.getAddressAt(0); | |
| 479 if (entryAddr == null) { | |
| 480 throw new RuntimeException("gHotSpotVMIntConstants was not initialized properly in the remote process; can not continue"); | |
| 481 } | |
| 482 | |
| 483 // Start iterating down it until we find an entry with no name | |
| 484 Address nameAddr = null; | |
| 485 do { | |
| 486 // Fetch the type name first | |
| 487 nameAddr = entryAddr.getAddressAt(intConstantEntryNameOffset); | |
| 488 if (nameAddr != null) { | |
| 489 String name = CStringUtilities.getString(nameAddr); | |
| 490 int value = (int) entryAddr.getCIntegerAt(intConstantEntryValueOffset, C_INT32_SIZE, false); | |
| 491 | |
| 492 // Be a little resilient | |
| 493 Integer oldValue = lookupIntConstant(name, false); | |
| 494 if (oldValue == null) { | |
| 495 addIntConstant(name, value); | |
| 496 } else { | |
| 497 if (oldValue.intValue() != value) { | |
| 498 throw new RuntimeException("Error: the integer constant \"" + name + | |
| 499 "\" had its value redefined (old was " + oldValue + | |
| 500 ", new is " + value + ". Aborting."); | |
| 501 } else { | |
| 502 System.err.println("Warning: the int constant \"" + name + "\" (declared in the remote VM in VMStructs::localHotSpotVMIntConstants) " + | |
| 503 "had its value declared as " + value + " twice. Continuing."); | |
| 504 } | |
| 505 } | |
| 506 } | |
| 507 | |
| 508 entryAddr = entryAddr.addOffsetTo(intConstantEntryArrayStride); | |
| 509 } while (nameAddr != null); | |
| 510 } | |
| 511 | |
| 512 private void readVMLongConstants() { | |
| 513 // Get the variables we need in order to traverse the VMLongConstantEntry[] | |
| 514 long longConstantEntryNameOffset; | |
| 515 long longConstantEntryValueOffset; | |
| 516 long longConstantEntryArrayStride; | |
| 517 | |
| 518 longConstantEntryNameOffset = getLongValueFromProcess("gHotSpotVMLongConstantEntryNameOffset"); | |
| 519 longConstantEntryValueOffset = getLongValueFromProcess("gHotSpotVMLongConstantEntryValueOffset"); | |
| 520 longConstantEntryArrayStride = getLongValueFromProcess("gHotSpotVMLongConstantEntryArrayStride"); | |
| 521 | |
| 522 // Fetch the address of the VMLongConstantEntry* | |
| 523 Address entryAddr = lookupInProcess("gHotSpotVMLongConstants"); | |
| 524 // Dereference this once to get the pointer to the first VMLongConstantEntry | |
| 525 entryAddr = entryAddr.getAddressAt(0); | |
| 526 if (entryAddr == null) { | |
| 527 throw new RuntimeException("gHotSpotVMLongConstants was not initialized properly in the remote process; can not continue"); | |
| 528 } | |
| 529 | |
| 530 // Start iterating down it until we find an entry with no name | |
| 531 Address nameAddr = null; | |
| 532 do { | |
| 533 // Fetch the type name first | |
| 534 nameAddr = entryAddr.getAddressAt(longConstantEntryNameOffset); | |
| 535 if (nameAddr != null) { | |
| 536 String name = CStringUtilities.getString(nameAddr); | |
| 537 int value = (int) entryAddr.getCIntegerAt(longConstantEntryValueOffset, C_INT64_SIZE, true); | |
| 538 | |
| 539 // Be a little resilient | |
| 540 Long oldValue = lookupLongConstant(name, false); | |
| 541 if (oldValue == null) { | |
| 542 addLongConstant(name, value); | |
| 543 } else { | |
| 544 if (oldValue.longValue() != value) { | |
| 545 throw new RuntimeException("Error: the long constant \"" + name + | |
| 546 "\" had its value redefined (old was " + oldValue + | |
| 547 ", new is " + value + ". Aborting."); | |
| 548 } else { | |
| 549 System.err.println("Warning: the long constant \"" + name + "\" (declared in the remote VM in VMStructs::localHotSpotVMLongConstants) " + | |
| 550 "had its value declared as " + value + " twice. Continuing."); | |
| 551 } | |
| 552 } | |
| 553 } | |
| 554 | |
| 555 entryAddr = entryAddr.addOffsetTo(longConstantEntryArrayStride); | |
| 556 } while (nameAddr != null); | |
| 557 } | |
| 558 | |
| 559 private BasicType lookupOrFail(String typeName) { | |
| 560 BasicType type = (BasicType) lookupType(typeName, false); | |
| 561 if (type == null) { | |
| 562 throw new RuntimeException("Type \"" + typeName + "\", referenced in VMStructs::localHotSpotVMStructs in the remote VM, " + | |
| 563 "was not present in the remote VMStructs::localHotSpotVMTypes table (should have been caught " + | |
| 564 "in the debug build of that VM). Can not continue."); | |
| 565 } | |
| 566 return type; | |
| 567 } | |
| 568 | |
| 569 private long getLongValueFromProcess(String symbol) { | |
| 570 return lookupInProcess(symbol).getCIntegerAt(0, C_INT64_SIZE, true); | |
| 571 } | |
| 572 | |
| 573 private Address lookupInProcess(String symbol) throws NoSuchSymbolException { | |
| 574 // FIXME: abstract away the loadobject name | |
| 575 for (int i = 0; i < jvmLibNames.length; i++) { | |
| 576 Address addr = symbolLookup.lookup(jvmLibNames[i], symbol); | |
| 577 if (addr != null) { | |
| 578 return addr; | |
| 579 } | |
| 580 } | |
| 581 String errStr = "("; | |
| 582 for (int i = 0; i < jvmLibNames.length; i++) { | |
| 583 errStr += jvmLibNames[i]; | |
| 584 if (i < jvmLibNames.length - 1) { | |
| 585 errStr += ", "; | |
| 586 } | |
| 587 } | |
| 588 errStr += ")"; | |
| 589 throw new NoSuchSymbolException(symbol, | |
| 590 "Could not find symbol \"" + symbol + | |
| 591 "\" in any of the known library names " + | |
| 592 errStr); | |
| 593 } | |
| 594 | |
| 595 private BasicType lookupOrCreateClass(String typeName, boolean isOopType, | |
| 596 boolean isIntegerType, boolean isUnsigned) { | |
| 597 BasicType type = (BasicType) lookupType(typeName, false); | |
| 598 if (type == null) { | |
| 599 // Create a new type | |
| 600 type = createBasicType(typeName, isOopType, isIntegerType, isUnsigned); | |
| 601 } | |
| 602 return type; | |
| 603 } | |
| 604 | |
| 605 /** Creates a new BasicType, initializes its size to -1 so we can | |
| 606 test to ensure that all types' sizes are initialized by VMTypes, | |
| 607 and adds it to the database. Takes care of initializing integer | |
| 608 and oop types properly. */ | |
| 609 private BasicType createBasicType(String typeName, boolean isOopType, | |
| 610 boolean isIntegerType, boolean isUnsigned) { | |
| 611 | |
| 612 BasicType type = null; | |
| 613 | |
| 614 if (isIntegerType) { | |
| 615 type = new BasicCIntegerType(this, typeName, isUnsigned); | |
| 616 } else { | |
| 617 if (typeNameIsPointerType(typeName)) { | |
| 618 type = recursiveCreateBasicPointerType(typeName); | |
| 619 } else { | |
| 620 type = new BasicType(this, typeName); | |
| 621 } | |
| 622 | |
| 623 if (isOopType) { | |
| 624 // HACK: turn markOop into a C integer type. This allows | |
| 625 // proper handling of it in the Serviceability Agent. (FIXME | |
| 626 // -- consider doing something different here) | |
| 627 if (typeName.equals("markOop")) { | |
| 628 type = new BasicCIntegerType(this, typeName, true); | |
| 629 } else { | |
| 630 type.setIsOopType(true); | |
| 631 } | |
| 632 } | |
| 633 } | |
| 634 | |
| 635 type.setSize(UNINITIALIZED_SIZE); | |
| 636 addType(type); | |
| 637 return type; | |
| 638 } | |
| 639 | |
| 640 /** Recursively creates a PointerType from the string representation | |
| 641 of the type's name. Note that this currently needs some | |
| 642 workarounds due to incomplete information in the VMStructs | |
| 643 database. */ | |
| 644 private BasicPointerType recursiveCreateBasicPointerType(String typeName) { | |
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645 BasicPointerType result = (BasicPointerType)super.lookupType(typeName, false); |
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646 if (result != null) { |
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647 return result; |
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648 } |
| 0 | 649 String targetTypeName = typeName.substring(0, typeName.lastIndexOf('*')).trim(); |
| 650 Type targetType = null; | |
| 651 if (typeNameIsPointerType(targetTypeName)) { | |
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652 targetType = lookupType(targetTypeName, false); |
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653 if (targetType == null) { |
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654 targetType = recursiveCreateBasicPointerType(targetTypeName); |
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655 } |
| 0 | 656 } else { |
| 657 targetType = lookupType(targetTypeName, false); | |
| 658 if (targetType == null) { | |
| 659 // Workaround for missing C integer types in database. | |
| 660 // Also looks like we can't throw an exception for other | |
| 661 // missing target types because there are some in old | |
| 662 // VMStructs tables that didn't have the target type declared. | |
| 663 // For this case, we create basic types that never get filled | |
| 664 // in. | |
| 665 | |
| 666 if (targetTypeName.equals("char") || | |
| 667 targetTypeName.equals("const char")) { | |
| 668 // We don't have a representation of const-ness of C types in the SA | |
| 669 BasicType basicTargetType = createBasicType(targetTypeName, false, true, false); | |
| 670 basicTargetType.setSize(1); | |
| 671 targetType = basicTargetType; | |
| 672 } else if (targetTypeName.equals("u_char")) { | |
| 673 BasicType basicTargetType = createBasicType(targetTypeName, false, true, true); | |
| 674 basicTargetType.setSize(1); | |
| 675 targetType = basicTargetType; | |
| 676 } else { | |
| 677 if (DEBUG) { | |
| 678 System.err.println("WARNING: missing target type \"" + targetTypeName + "\" for pointer type \"" + typeName + "\""); | |
| 679 } | |
| 680 targetType = createBasicType(targetTypeName, false, false, false); | |
| 681 } | |
| 682 } | |
| 683 } | |
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684 result = new BasicPointerType(this, typeName, targetType); |
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685 if (pointerSize == UNINITIALIZED_SIZE && !typeName.equals("void*")) { |
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686 // void* must be declared early so that other pointer types can use that to set their size. |
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687 throw new InternalError("void* type hasn't been seen when parsing " + typeName); |
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688 } |
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689 result.setSize(pointerSize); |
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690 addType(result); |
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691 return result; |
| 0 | 692 } |
| 693 | |
| 694 private boolean typeNameIsPointerType(String typeName) { | |
| 695 int i = typeName.length() - 1; | |
| 696 while (i >= 0 && Character.isWhitespace(typeName.charAt(i))) { | |
| 697 --i; | |
| 698 } | |
| 699 if (i >= 0 && typeName.charAt(i) == '*') { | |
| 700 return true; | |
| 701 } | |
| 702 return false; | |
| 703 } | |
| 704 | |
| 705 public void createType(String typeName, String superclassName, | |
| 706 boolean isOopType, boolean isIntegerType, | |
| 707 boolean isUnsigned, long size) { | |
| 708 // See whether we have a superclass | |
| 709 BasicType superclass = null; | |
| 710 if (superclassName != null) { | |
| 711 // Fetch or create it (FIXME: would get oop types wrong if | |
| 712 // they had a hierarchy; consider using lookupOrFail) | |
| 713 superclass = lookupOrCreateClass(superclassName, false, false, false); | |
| 714 } | |
| 715 | |
| 716 // Lookup or create the current type | |
| 717 BasicType curType = lookupOrCreateClass(typeName, isOopType, isIntegerType, isUnsigned); | |
| 718 // Set superclass and/or ensure it's correct | |
| 719 if (superclass != null) { | |
| 720 if (curType.getSuperclass() == null) { | |
| 721 // Set the superclass in the current type | |
| 722 curType.setSuperclass(superclass); | |
| 723 } | |
| 724 | |
| 725 if (curType.getSuperclass() != superclass) { | |
| 726 throw new RuntimeException("Error: the type \"" + typeName + "\" (declared in the remote VM in VMStructs::localHotSpotVMTypes) " + | |
| 727 "had its superclass redefined (old was " + curType.getSuperclass().getName() + ", new is " + | |
| 728 superclass.getName() + ")."); | |
| 729 } | |
| 730 } | |
| 731 | |
| 732 // Classes are created with a size of UNINITIALIZED_SIZE. | |
| 733 // Set size if necessary. | |
| 3939 | 734 if (curType.getSize() == UNINITIALIZED_SIZE || curType.getSize() == 0) { |
| 0 | 735 curType.setSize(size); |
| 736 } else { | |
| 737 if (curType.getSize() != size) { | |
| 738 throw new RuntimeException("Error: the type \"" + typeName + "\" (declared in the remote VM in VMStructs::localHotSpotVMTypes) " + | |
| 739 "had its size redefined (old was " + curType.getSize() + ", new is " + size + ")."); | |
| 740 } | |
| 741 | |
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742 if (!typeNameIsPointerType(typeName)) { |
| 0 | 743 System.err.println("Warning: the type \"" + typeName + "\" (declared in the remote VM in VMStructs::localHotSpotVMTypes) " + |
| 744 "had its size declared as " + size + " twice. Continuing."); | |
| 745 } | |
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746 } |
| 0 | 747 |
| 748 } | |
| 749 | |
| 750 /** "Virtual constructor" for fields based on type */ | |
| 751 public void createField(BasicType containingType, | |
| 752 String name, Type type, boolean isStatic, | |
| 753 long offset, Address staticFieldAddress) { | |
| 754 // Add field to containing type | |
| 755 containingType.addField(internalCreateField(containingType, name, type, isStatic, offset, staticFieldAddress)); | |
| 756 } | |
| 757 | |
| 758 Field internalCreateField(BasicType containingType, | |
| 759 String name, Type type, boolean isStatic, | |
| 760 long offset, Address staticFieldAddress) { | |
| 761 // "Virtual constructor" based on type | |
| 762 if (type.isOopType()) { | |
| 763 return new BasicOopField(this, containingType, name, type, | |
| 764 isStatic, offset, staticFieldAddress); | |
| 765 } | |
| 766 | |
| 767 if (type instanceof CIntegerType) { | |
| 768 return new BasicCIntegerField(this, containingType, name, type, | |
| 769 isStatic, offset, staticFieldAddress); | |
| 770 } | |
| 771 | |
| 772 if (type.equals(getJBooleanType())) { | |
| 773 return new BasicJBooleanField(this, containingType, name, type, | |
| 774 isStatic, offset, staticFieldAddress); | |
| 775 } | |
| 776 | |
| 777 if (type.equals(getJByteType())) { | |
| 778 return new BasicJByteField(this, containingType, name, type, | |
| 779 isStatic, offset, staticFieldAddress); | |
| 780 } | |
| 781 | |
| 782 if (type.equals(getJCharType())) { | |
| 783 return new BasicJCharField(this, containingType, name, type, | |
| 784 isStatic, offset, staticFieldAddress); | |
| 785 } | |
| 786 | |
| 787 if (type.equals(getJDoubleType())) { | |
| 788 return new BasicJDoubleField(this, containingType, name, type, | |
| 789 isStatic, offset, staticFieldAddress); | |
| 790 } | |
| 791 | |
| 792 if (type.equals(getJFloatType())) { | |
| 793 return new BasicJFloatField(this, containingType, name, type, | |
| 794 isStatic, offset, staticFieldAddress); | |
| 795 } | |
| 796 | |
| 797 if (type.equals(getJIntType())) { | |
| 798 return new BasicJIntField(this, containingType, name, type, | |
| 799 isStatic, offset, staticFieldAddress); | |
| 800 } | |
| 801 | |
| 802 if (type.equals(getJLongType())) { | |
| 803 return new BasicJLongField(this, containingType, name, type, | |
| 804 isStatic, offset, staticFieldAddress); | |
| 805 } | |
| 806 | |
| 807 if (type.equals(getJShortType())) { | |
| 808 return new BasicJShortField(this, containingType, name, type, | |
| 809 isStatic, offset, staticFieldAddress); | |
| 810 } | |
| 811 | |
| 812 // Unknown ("opaque") type. Instantiate ordinary Field. | |
| 813 return new BasicField(this, containingType, name, type, | |
| 814 isStatic, offset, staticFieldAddress); | |
| 815 } | |
| 816 | |
| 817 // For debugging | |
| 818 private void dumpMemory(Address addr, int len) { | |
| 819 int i = 0; | |
| 820 while (i < len) { | |
| 821 System.err.print(addr.addOffsetTo(i) + ":"); | |
| 822 for (int j = 0; j < 8 && i < len; i++, j++) { | |
| 823 String s = Long.toHexString(addr.getCIntegerAt(i, 1, true)); | |
| 824 System.err.print(" 0x"); | |
| 825 for (int k = 0; k < 2 - s.length(); k++) { | |
| 826 System.err.print("0"); | |
| 827 } | |
| 828 System.err.print(s); | |
| 829 } | |
| 830 System.err.println(); | |
| 831 } | |
| 832 } | |
| 833 } |