Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/tools/jcore/ClassWriter.java @ 3938:e6b1331a51d2
7086585: make Java field injection more flexible
Reviewed-by: jrose, twisti, kvn, coleenp
| author | never |
|---|---|
| date | Sat, 10 Sep 2011 17:29:02 -0700 |
| parents | 6c97c830fb6f |
| children | cb315dc80374 |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
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2 * Copyright (c) 2002, 2011, 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.tools.jcore; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.oops.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 | |
| 32 public class ClassWriter implements /* imports */ ClassConstants | |
| 33 { | |
| 34 public static final boolean DEBUG = false; | |
| 35 | |
| 36 protected void debugMessage(String message) { | |
| 37 System.out.println(message); | |
| 38 } | |
| 39 | |
| 40 protected InstanceKlass klass; | |
| 41 protected DataOutputStream dos; | |
| 42 protected ConstantPool cpool; | |
| 43 | |
| 44 // Map between class name to index of type CONSTANT_Class | |
| 45 protected Map classToIndex = new HashMap(); | |
| 46 | |
| 47 // Map between any modified UTF-8 and it's constant pool index. | |
| 48 protected Map utf8ToIndex = new HashMap(); | |
| 49 | |
| 50 // constant pool index for attribute names. | |
| 51 | |
| 52 protected short _sourceFileIndex; | |
| 53 protected short _innerClassesIndex; | |
| 54 protected short _syntheticIndex; | |
| 55 protected short _deprecatedIndex; | |
| 56 protected short _constantValueIndex; | |
| 57 protected short _codeIndex; | |
| 58 protected short _exceptionsIndex; | |
| 59 protected short _lineNumberTableIndex; | |
| 60 protected short _localVariableTableIndex; | |
| 61 protected short _signatureIndex; | |
| 62 | |
| 63 protected static int extractHighShortFromInt(int val) { | |
| 1602 | 64 // must stay in sync with constantPoolOopDesc::name_and_type_at_put, method_at_put, etc. |
| 0 | 65 return (val >> 16) & 0xFFFF; |
| 66 } | |
| 67 | |
| 68 protected static int extractLowShortFromInt(int val) { | |
| 1602 | 69 // must stay in sync with constantPoolOopDesc::name_and_type_at_put, method_at_put, etc. |
| 0 | 70 return val & 0xFFFF; |
| 71 } | |
| 72 | |
| 73 public ClassWriter(InstanceKlass kls, OutputStream os) { | |
| 74 klass = kls; | |
| 75 dos = new DataOutputStream(os); | |
| 76 cpool = klass.getConstants(); | |
| 77 } | |
| 78 | |
| 79 public void write() throws IOException { | |
| 80 if (DEBUG) debugMessage("class name = " + klass.getName().asString()); | |
| 81 | |
| 82 // write magic | |
| 83 dos.writeInt(0xCAFEBABE); | |
| 84 | |
| 705 | 85 writeVersion(); |
| 0 | 86 writeConstantPool(); |
| 87 writeClassAccessFlags(); | |
| 88 writeThisClass(); | |
| 89 writeSuperClass(); | |
| 90 writeInterfaces(); | |
| 91 writeFields(); | |
| 92 writeMethods(); | |
| 93 writeClassAttributes(); | |
| 94 | |
| 95 // flush output | |
| 96 dos.flush(); | |
| 97 } | |
| 98 | |
| 705 | 99 protected void writeVersion() throws IOException { |
| 100 dos.writeShort((short)klass.minorVersion()); | |
| 101 dos.writeShort((short)klass.majorVersion()); | |
| 0 | 102 } |
| 103 | |
| 705 | 104 protected void writeIndex(int index) throws IOException { |
| 105 if (index == 0) throw new InternalError(); | |
| 106 dos.writeShort(index); | |
| 0 | 107 } |
| 108 | |
| 109 protected void writeConstantPool() throws IOException { | |
| 110 final TypeArray tags = cpool.getTags(); | |
| 111 final long len = tags.getLength(); | |
| 112 dos.writeShort((short) len); | |
| 113 | |
| 114 if (DEBUG) debugMessage("constant pool length = " + len); | |
| 115 | |
| 116 int ci = 0; // constant pool index | |
| 117 | |
| 118 // collect all modified UTF-8 Strings from Constant Pool | |
| 119 | |
| 120 for (ci = 1; ci < len; ci++) { | |
| 121 byte cpConstType = tags.getByteAt(ci); | |
| 122 if(cpConstType == JVM_CONSTANT_Utf8) { | |
| 123 Symbol sym = cpool.getSymbolAt(ci); | |
| 124 utf8ToIndex.put(sym.asString(), new Short((short) ci)); | |
| 125 } | |
| 126 else if(cpConstType == JVM_CONSTANT_Long || | |
| 127 cpConstType == JVM_CONSTANT_Double) { | |
| 128 ci++; | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 // remember index of attribute name modified UTF-8 strings | |
| 133 | |
| 134 // class attributes | |
| 135 Short sourceFileIndex = (Short) utf8ToIndex.get("SourceFile"); | |
| 136 _sourceFileIndex = (sourceFileIndex != null)? sourceFileIndex.shortValue() : 0; | |
| 137 if (DEBUG) debugMessage("SourceFile index = " + _sourceFileIndex); | |
| 138 | |
| 139 Short innerClassesIndex = (Short) utf8ToIndex.get("InnerClasses"); | |
| 140 _innerClassesIndex = (innerClassesIndex != null)? innerClassesIndex.shortValue() : 0; | |
| 141 if (DEBUG) debugMessage("InnerClasses index = " + _innerClassesIndex); | |
| 142 | |
| 143 // field attributes | |
| 144 Short constantValueIndex = (Short) utf8ToIndex.get("ConstantValue"); | |
| 145 _constantValueIndex = (constantValueIndex != null)? | |
| 146 constantValueIndex.shortValue() : 0; | |
| 147 if (DEBUG) debugMessage("ConstantValue index = " + _constantValueIndex); | |
| 148 | |
| 149 Short syntheticIndex = (Short) utf8ToIndex.get("Synthetic"); | |
| 150 _syntheticIndex = (syntheticIndex != null)? syntheticIndex.shortValue() : 0; | |
| 151 if (DEBUG) debugMessage("Synthetic index = " + _syntheticIndex); | |
| 152 | |
| 153 Short deprecatedIndex = (Short) utf8ToIndex.get("Deprecated"); | |
| 154 _deprecatedIndex = (deprecatedIndex != null)? deprecatedIndex.shortValue() : 0; | |
| 155 if (DEBUG) debugMessage("Deprecated index = " + _deprecatedIndex); | |
| 156 | |
| 157 // method attributes | |
| 158 Short codeIndex = (Short) utf8ToIndex.get("Code"); | |
| 159 _codeIndex = (codeIndex != null)? codeIndex.shortValue() : 0; | |
| 160 if (DEBUG) debugMessage("Code index = " + _codeIndex); | |
| 161 | |
| 162 Short exceptionsIndex = (Short) utf8ToIndex.get("Exceptions"); | |
| 163 _exceptionsIndex = (exceptionsIndex != null)? exceptionsIndex.shortValue() : 0; | |
| 164 if (DEBUG) debugMessage("Exceptions index = " + _exceptionsIndex); | |
| 165 | |
| 166 // Short syntheticIndex = (Short) utf8ToIndex.get("Synthetic"); | |
| 167 // Short deprecatedIndex = (Short) utf8ToIndex.get("Deprecated"); | |
| 168 | |
| 169 // Code attributes | |
| 170 Short lineNumberTableIndex = (Short) utf8ToIndex.get("LineNumberTable"); | |
| 171 _lineNumberTableIndex = (lineNumberTableIndex != null)? | |
| 172 lineNumberTableIndex.shortValue() : 0; | |
| 173 if (DEBUG) debugMessage("LineNumberTable index = " + _lineNumberTableIndex); | |
| 174 | |
| 175 Short localVariableTableIndex = (Short) utf8ToIndex.get("LocalVariableTable"); | |
| 176 _localVariableTableIndex = (localVariableTableIndex != null)? | |
| 177 localVariableTableIndex.shortValue() : 0; | |
| 178 if (DEBUG) debugMessage("LocalVariableTable index = " + _localVariableTableIndex); | |
| 179 | |
| 180 Short signatureIdx = (Short) utf8ToIndex.get("Signature"); | |
| 181 _signatureIndex = (signatureIdx != null)? signatureIdx.shortValue() : 0; | |
| 182 if (DEBUG) debugMessage("Signature index = " + _signatureIndex); | |
| 183 | |
| 184 for(ci = 1; ci < len; ci++) { | |
| 185 // write cp_info | |
| 186 // write constant type | |
| 187 byte cpConstType = tags.getByteAt(ci); | |
| 188 switch(cpConstType) { | |
| 189 case JVM_CONSTANT_Utf8: { | |
| 190 dos.writeByte(cpConstType); | |
| 191 Symbol sym = cpool.getSymbolAt(ci); | |
| 192 dos.writeShort((short)sym.getLength()); | |
| 193 dos.write(sym.asByteArray()); | |
| 194 if (DEBUG) debugMessage("CP[" + ci + "] = modified UTF-8 " + sym.asString()); | |
| 195 break; | |
| 196 } | |
| 197 | |
| 198 case JVM_CONSTANT_Unicode: | |
| 199 throw new IllegalArgumentException("Unicode constant!"); | |
| 200 | |
| 201 case JVM_CONSTANT_Integer: | |
| 202 dos.writeByte(cpConstType); | |
| 203 dos.writeInt(cpool.getIntAt(ci)); | |
| 204 if (DEBUG) debugMessage("CP[" + ci + "] = int " + cpool.getIntAt(ci)); | |
| 205 break; | |
| 206 | |
| 207 case JVM_CONSTANT_Float: | |
| 208 dos.writeByte(cpConstType); | |
| 209 dos.writeFloat(cpool.getFloatAt(ci)); | |
| 210 if (DEBUG) debugMessage("CP[" + ci + "] = float " + cpool.getFloatAt(ci)); | |
| 211 break; | |
| 212 | |
| 213 case JVM_CONSTANT_Long: { | |
| 214 dos.writeByte(cpConstType); | |
| 215 long l = cpool.getLongAt(ci); | |
| 216 // long entries occupy two pool entries | |
| 217 ci++; | |
| 218 dos.writeLong(l); | |
| 219 break; | |
| 220 } | |
| 221 | |
| 222 case JVM_CONSTANT_Double: | |
| 223 dos.writeByte(cpConstType); | |
| 224 dos.writeDouble(cpool.getDoubleAt(ci)); | |
| 225 // double entries occupy two pool entries | |
| 226 ci++; | |
| 227 break; | |
| 228 | |
| 229 case JVM_CONSTANT_Class: { | |
| 230 dos.writeByte(cpConstType); | |
| 231 // Klass already resolved. ConstantPool constains klassOop. | |
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232 Klass refKls = (Klass) cpool.getObjAtRaw(ci); |
| 0 | 233 String klassName = refKls.getName().asString(); |
| 234 | |
| 235 Short s = (Short) utf8ToIndex.get(klassName); | |
| 236 classToIndex.put(klassName, new Short((short)ci)); | |
| 237 dos.writeShort(s.shortValue()); | |
| 238 if (DEBUG) debugMessage("CP[" + ci + "] = class " + s); | |
| 239 break; | |
| 240 } | |
| 241 | |
| 242 // case JVM_CONSTANT_ClassIndex: | |
| 1385 | 243 case JVM_CONSTANT_UnresolvedClassInError: |
| 0 | 244 case JVM_CONSTANT_UnresolvedClass: { |
| 245 dos.writeByte(JVM_CONSTANT_Class); | |
| 246 String klassName = cpool.getSymbolAt(ci).asString(); | |
| 247 | |
| 248 Short s = (Short) utf8ToIndex.get(klassName); | |
| 249 classToIndex.put(klassName, new Short((short) ci)); | |
| 250 | |
| 251 dos.writeShort(s.shortValue()); | |
| 252 if (DEBUG) debugMessage("CP[" + ci + "] = class " + s); | |
| 253 break; | |
| 254 } | |
| 255 | |
| 256 case JVM_CONSTANT_String: { | |
| 257 dos.writeByte(cpConstType); | |
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258 String str = OopUtilities.stringOopToString(cpool.getObjAtRaw(ci)); |
| 0 | 259 Short s = (Short) utf8ToIndex.get(str); |
| 260 dos.writeShort(s.shortValue()); | |
| 261 if (DEBUG) debugMessage("CP[" + ci + "] = string " + s); | |
| 262 break; | |
| 263 } | |
| 264 | |
| 265 // case JVM_CONSTANT_StringIndex: | |
| 266 case JVM_CONSTANT_UnresolvedString: { | |
| 267 dos.writeByte(JVM_CONSTANT_String); | |
| 268 String val = cpool.getSymbolAt(ci).asString(); | |
| 269 | |
| 270 Short s = (Short) utf8ToIndex.get(val); | |
| 271 dos.writeShort(s.shortValue()); | |
| 272 if (DEBUG) debugMessage("CP[" + ci + "] = string " + s); | |
| 273 break; | |
| 274 } | |
| 275 | |
| 276 // all external, internal method/field references | |
| 277 case JVM_CONSTANT_Fieldref: | |
| 278 case JVM_CONSTANT_Methodref: | |
| 279 case JVM_CONSTANT_InterfaceMethodref: { | |
| 280 dos.writeByte(cpConstType); | |
| 281 int value = cpool.getIntAt(ci); | |
| 282 short klassIndex = (short) extractLowShortFromInt(value); | |
| 283 short nameAndTypeIndex = (short) extractHighShortFromInt(value); | |
| 284 dos.writeShort(klassIndex); | |
| 285 dos.writeShort(nameAndTypeIndex); | |
| 286 if (DEBUG) debugMessage("CP[" + ci + "] = ref klass = " + | |
| 287 klassIndex + ", N&T = " + nameAndTypeIndex); | |
| 288 break; | |
| 289 } | |
| 290 | |
| 291 case JVM_CONSTANT_NameAndType: { | |
| 292 dos.writeByte(cpConstType); | |
| 293 int value = cpool.getIntAt(ci); | |
| 294 short nameIndex = (short) extractLowShortFromInt(value); | |
| 295 short signatureIndex = (short) extractHighShortFromInt(value); | |
| 296 dos.writeShort(nameIndex); | |
| 297 dos.writeShort(signatureIndex); | |
| 298 if (DEBUG) debugMessage("CP[" + ci + "] = N&T name = " + nameIndex | |
| 299 + ", type = " + signatureIndex); | |
| 300 break; | |
| 301 } | |
| 1602 | 302 |
| 303 case JVM_CONSTANT_MethodHandle: { | |
| 304 dos.writeByte(cpConstType); | |
| 305 int value = cpool.getIntAt(ci); | |
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306 byte refKind = (byte) extractLowShortFromInt(value); |
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307 short memberIndex = (short) extractHighShortFromInt(value); |
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308 dos.writeByte(refKind); |
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309 dos.writeShort(memberIndex); |
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310 if (DEBUG) debugMessage("CP[" + ci + "] = MH kind = " + |
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311 refKind + ", mem = " + memberIndex); |
| 1602 | 312 break; |
| 313 } | |
| 314 | |
| 315 case JVM_CONSTANT_MethodType: { | |
| 316 dos.writeByte(cpConstType); | |
| 317 int value = cpool.getIntAt(ci); | |
| 318 short refIndex = (short) value; | |
| 319 dos.writeShort(refIndex); | |
| 320 if (DEBUG) debugMessage("CP[" + ci + "] = MT index = " + refIndex); | |
| 321 break; | |
| 322 } | |
| 323 | |
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324 case JVM_CONSTANT_InvokeDynamic: { |
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325 dos.writeByte(cpConstType); |
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326 int value = cpool.getIntAt(ci); |
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327 short bsmIndex = (short) extractLowShortFromInt(value); |
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328 short nameAndTypeIndex = (short) extractHighShortFromInt(value); |
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329 dos.writeShort(bsmIndex); |
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330 dos.writeShort(nameAndTypeIndex); |
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331 if (DEBUG) debugMessage("CP[" + ci + "] = INDY bsm = " + |
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332 bsmIndex + ", N&T = " + nameAndTypeIndex); |
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333 break; |
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334 } |
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335 |
| 1385 | 336 default: |
| 337 throw new InternalError("Unknown tag: " + cpConstType); | |
| 0 | 338 } // switch |
| 339 } | |
| 340 } | |
| 341 | |
| 342 protected void writeClassAccessFlags() throws IOException { | |
| 343 int flags = (int)(klass.getAccessFlags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
| 344 dos.writeShort((short)flags); | |
| 345 } | |
| 346 | |
| 347 protected void writeThisClass() throws IOException { | |
| 348 String klassName = klass.getName().asString(); | |
| 349 Short index = (Short) classToIndex.get(klassName); | |
| 350 dos.writeShort(index.shortValue()); | |
| 351 if (DEBUG) debugMessage("this class = " + index); | |
| 352 } | |
| 353 | |
| 354 protected void writeSuperClass() throws IOException { | |
| 355 Klass superKlass = klass.getSuper(); | |
| 356 if (superKlass != null) { // is not java.lang.Object | |
| 357 String superName = superKlass.getName().asString(); | |
| 358 Short index = (Short) classToIndex.get(superName); | |
| 359 if (DEBUG) debugMessage("super class = " + index); | |
| 360 dos.writeShort(index.shortValue()); | |
| 361 } else { | |
| 362 dos.writeShort(0); // no super class | |
| 363 } | |
| 364 } | |
| 365 protected void writeInterfaces() throws IOException { | |
| 366 ObjArray interfaces = klass.getLocalInterfaces(); | |
| 367 final int len = (int) interfaces.getLength(); | |
| 368 | |
| 369 if (DEBUG) debugMessage("number of interfaces = " + len); | |
| 370 | |
| 371 // write interfaces count | |
| 372 dos.writeShort((short) len); | |
| 373 for (int i = 0; i < len; i++) { | |
| 374 Klass k = (Klass) interfaces.getObjAt(i); | |
| 375 Short index = (Short) classToIndex.get(k.getName().asString()); | |
| 376 dos.writeShort(index.shortValue()); | |
| 377 if (DEBUG) debugMessage("\t" + index); | |
| 378 } | |
| 379 } | |
| 380 | |
| 381 protected void writeFields() throws IOException { | |
| 382 TypeArray fields = klass.getFields(); | |
| 3938 | 383 final int length = klass.getJavaFieldsCount(); |
| 0 | 384 |
| 385 // write number of fields | |
| 3938 | 386 dos.writeShort((short) (length / InstanceKlass.FIELD_SLOTS) ); |
| 0 | 387 |
| 388 if (DEBUG) debugMessage("number of fields = " | |
| 3938 | 389 + length/InstanceKlass.FIELD_SLOTS); |
| 0 | 390 |
| 3938 | 391 for (int index = 0; index < length; index += InstanceKlass.FIELD_SLOTS) { |
| 0 | 392 short accessFlags = fields.getShortAt(index + InstanceKlass.ACCESS_FLAGS_OFFSET); |
| 393 dos.writeShort(accessFlags & (short) JVM_RECOGNIZED_FIELD_MODIFIERS); | |
| 394 | |
| 395 short nameIndex = fields.getShortAt(index + InstanceKlass.NAME_INDEX_OFFSET); | |
| 396 dos.writeShort(nameIndex); | |
| 397 | |
| 398 short signatureIndex = fields.getShortAt(index + InstanceKlass.SIGNATURE_INDEX_OFFSET); | |
| 399 dos.writeShort(signatureIndex); | |
| 400 if (DEBUG) debugMessage("\tfield name = " + nameIndex + ", signature = " + signatureIndex); | |
| 401 | |
| 402 short fieldAttributeCount = 0; | |
| 705 | 403 boolean hasSyn = hasSyntheticAttribute(accessFlags); |
| 404 if (hasSyn) | |
| 0 | 405 fieldAttributeCount++; |
| 406 | |
| 407 short initvalIndex = fields.getShortAt(index + InstanceKlass.INITVAL_INDEX_OFFSET); | |
| 408 if (initvalIndex != 0) | |
| 409 fieldAttributeCount++; | |
| 410 | |
| 411 short genSigIndex = fields.getShortAt(index + InstanceKlass.GENERIC_SIGNATURE_INDEX_OFFSET); | |
| 412 if (genSigIndex != 0) | |
| 413 fieldAttributeCount++; | |
| 414 | |
| 415 dos.writeShort(fieldAttributeCount); | |
| 416 | |
| 417 // write synthetic, if applicable | |
| 705 | 418 if (hasSyn) |
| 0 | 419 writeSynthetic(); |
| 420 | |
| 421 if (initvalIndex != 0) { | |
| 705 | 422 writeIndex(_constantValueIndex); |
| 0 | 423 dos.writeInt(2); |
| 424 dos.writeShort(initvalIndex); | |
| 425 if (DEBUG) debugMessage("\tfield init value = " + initvalIndex); | |
| 426 } | |
| 427 | |
| 428 if (genSigIndex != 0) { | |
| 705 | 429 writeIndex(_signatureIndex); |
| 0 | 430 dos.writeInt(2); |
| 431 dos.writeShort(genSigIndex); | |
| 432 if (DEBUG) debugMessage("\tfield generic signature index " + genSigIndex); | |
| 433 } | |
| 434 } | |
| 435 } | |
| 436 | |
| 437 protected boolean isSynthetic(short accessFlags) { | |
| 438 return (accessFlags & (short) JVM_ACC_SYNTHETIC) != 0; | |
| 439 } | |
| 440 | |
| 705 | 441 protected boolean hasSyntheticAttribute(short accessFlags) { |
| 442 // Check if flags have the attribute and if the constant pool contains an entry for it. | |
| 443 return isSynthetic(accessFlags) && _syntheticIndex != 0; | |
| 444 } | |
| 445 | |
| 0 | 446 protected void writeSynthetic() throws IOException { |
| 705 | 447 writeIndex(_syntheticIndex); |
| 0 | 448 dos.writeInt(0); |
| 449 } | |
| 450 | |
| 451 protected void writeMethods() throws IOException { | |
| 452 ObjArray methods = klass.getMethods(); | |
| 453 final int len = (int) methods.getLength(); | |
| 454 // write number of methods | |
| 455 dos.writeShort((short) len); | |
| 456 if (DEBUG) debugMessage("number of methods = " + len); | |
| 457 for (int m = 0; m < len; m++) { | |
| 458 writeMethod((Method) methods.getObjAt(m)); | |
| 459 } | |
| 460 } | |
| 461 | |
| 462 protected void writeMethod(Method m) throws IOException { | |
| 463 long accessFlags = m.getAccessFlags(); | |
| 464 dos.writeShort((short) (accessFlags & JVM_RECOGNIZED_METHOD_MODIFIERS)); | |
| 465 dos.writeShort((short) m.getNameIndex()); | |
| 466 dos.writeShort((short) m.getSignatureIndex()); | |
| 467 if (DEBUG) debugMessage("\tmethod name = " + m.getNameIndex() + ", signature = " | |
| 468 + m.getSignatureIndex()); | |
| 469 | |
| 470 final boolean isNative = ((accessFlags & JVM_ACC_NATIVE) != 0); | |
| 471 final boolean isAbstract = ((accessFlags & JVM_ACC_ABSTRACT) != 0); | |
| 472 | |
| 473 short methodAttributeCount = 0; | |
| 474 | |
| 705 | 475 final boolean hasSyn = hasSyntheticAttribute((short)accessFlags); |
| 476 if (hasSyn) | |
| 0 | 477 methodAttributeCount++; |
| 478 | |
| 479 final boolean hasCheckedExceptions = m.hasCheckedExceptions(); | |
| 480 if (hasCheckedExceptions) | |
| 481 methodAttributeCount++; | |
| 482 | |
| 483 final boolean isCodeAvailable = (!isNative) && (!isAbstract); | |
| 484 if (isCodeAvailable) | |
| 485 methodAttributeCount++; | |
| 486 | |
| 487 final boolean isGeneric = (m.getGenericSignature() != null); | |
| 488 if (isGeneric) | |
| 489 methodAttributeCount++; | |
| 490 | |
| 491 dos.writeShort(methodAttributeCount); | |
| 492 if (DEBUG) debugMessage("\tmethod attribute count = " + methodAttributeCount); | |
| 493 | |
| 705 | 494 if (hasSyn) { |
| 0 | 495 if (DEBUG) debugMessage("\tmethod is synthetic"); |
| 496 writeSynthetic(); | |
| 497 } | |
| 498 | |
| 499 if (isCodeAvailable) { | |
| 500 byte[] code = m.getByteCode(); | |
| 501 short codeAttrCount = 0; | |
| 502 int codeSize = 2 /* max_stack */ + | |
| 503 2 /* max_locals */ + | |
| 504 4 /* code_length */ + | |
| 505 code.length /* code */ + | |
| 506 2 /* exp. table len. */ + | |
| 507 2 /* code attr. count */; | |
| 508 | |
| 509 TypeArray exceptionTable = m.getExceptionTable(); | |
| 510 final int exceptionTableLen = (int) exceptionTable.getLength(); | |
| 511 if (exceptionTableLen != 0) { | |
| 512 if (DEBUG) debugMessage("\tmethod has exception table"); | |
| 513 codeSize += (exceptionTableLen / 4) /* exception table is 4-tuple array */ | |
| 514 * (2 /* start_pc */ + | |
| 515 2 /* end_pc */ + | |
| 516 2 /* handler_pc */ + | |
| 517 2 /* catch_type */); | |
| 518 } | |
| 519 | |
| 520 boolean hasLineNumberTable = m.hasLineNumberTable(); | |
| 521 LineNumberTableElement[] lineNumberTable = null; | |
| 522 int lineNumberAttrLen = 0; | |
| 523 | |
| 524 if (hasLineNumberTable) { | |
| 525 if (DEBUG) debugMessage("\tmethod has line number table"); | |
| 526 lineNumberTable = m.getLineNumberTable(); | |
| 527 if (DEBUG) debugMessage("\t\tline table length = " + lineNumberTable.length); | |
| 528 | |
| 529 lineNumberAttrLen = 2 /* line number table length */ + | |
| 530 lineNumberTable.length * (2 /* start_pc */ + 2 /* line_number */); | |
| 531 | |
| 532 codeSize += 2 /* line number table attr index */ + | |
| 533 4 /* line number table attr length */ + | |
| 534 lineNumberAttrLen; | |
| 535 | |
| 536 if (DEBUG) debugMessage("\t\tline number table attr size = " + | |
| 537 lineNumberAttrLen); | |
| 538 | |
| 539 codeAttrCount++; | |
| 540 } | |
| 541 | |
| 542 boolean hasLocalVariableTable = m.hasLocalVariableTable(); | |
| 543 LocalVariableTableElement[] localVariableTable = null; | |
| 544 int localVarAttrLen = 0; | |
| 545 | |
| 546 if (hasLocalVariableTable) { | |
| 547 if (DEBUG) debugMessage("\tmethod has local variable table"); | |
| 548 localVariableTable = m.getLocalVariableTable(); | |
| 549 if (DEBUG) debugMessage("\t\tlocal variable table length = " | |
| 550 + localVariableTable.length); | |
| 551 localVarAttrLen = | |
| 552 2 /* local variable table length */ + | |
| 553 localVariableTable.length * ( 2 /* start_pc */ + | |
| 554 2 /* length */ + | |
| 555 2 /* name_index */ + | |
| 556 2 /* signature_index */ + | |
| 557 2 /* variable index */ ); | |
| 558 | |
| 559 if (DEBUG) debugMessage("\t\tlocal variable attr size = " + | |
| 560 localVarAttrLen); | |
| 561 | |
| 562 codeSize += 2 /* local variable table attr index */ + | |
| 563 4 /* local variable table attr length */ + | |
| 564 localVarAttrLen; | |
| 565 | |
| 566 codeAttrCount++; | |
| 567 } | |
| 568 | |
| 569 // fix ConstantPoolCache indices to ConstantPool indices. | |
| 570 rewriteByteCode(m, code); | |
| 571 | |
| 572 // start writing Code | |
| 573 | |
| 705 | 574 writeIndex(_codeIndex); |
| 0 | 575 |
| 576 dos.writeInt(codeSize); | |
| 577 if (DEBUG) debugMessage("\tcode attribute length = " + codeSize); | |
| 578 | |
| 579 dos.writeShort((short) m.getMaxStack()); | |
| 580 if (DEBUG) debugMessage("\tmax stack = " + m.getMaxStack()); | |
| 581 | |
| 582 dos.writeShort((short) m.getMaxLocals()); | |
| 583 if (DEBUG) debugMessage("\tmax locals = " + m.getMaxLocals()); | |
| 584 | |
| 585 dos.writeInt(code.length); | |
| 586 if (DEBUG) debugMessage("\tcode size = " + code.length); | |
| 587 | |
| 588 dos.write(code); | |
| 589 | |
| 590 // write exception table size | |
| 591 dos.writeShort((short) (exceptionTableLen / 4)); | |
| 592 if (DEBUG) debugMessage("\texception table length = " + (exceptionTableLen / 4)); | |
| 593 | |
| 594 if (exceptionTableLen != 0) { | |
| 595 for (int e = 0; e < exceptionTableLen; e += 4) { | |
| 596 dos.writeShort((short) exceptionTable.getIntAt(e)); | |
| 597 dos.writeShort((short) exceptionTable.getIntAt(e + 1)); | |
| 598 dos.writeShort((short) exceptionTable.getIntAt(e + 2)); | |
| 599 dos.writeShort((short) exceptionTable.getIntAt(e + 3)); | |
| 600 } | |
| 601 } | |
| 602 | |
| 603 dos.writeShort((short)codeAttrCount); | |
| 604 if (DEBUG) debugMessage("\tcode attribute count = " + codeAttrCount); | |
| 605 | |
| 606 // write LineNumberTable, if available. | |
| 607 if (hasLineNumberTable) { | |
| 705 | 608 writeIndex(_lineNumberTableIndex); |
| 0 | 609 dos.writeInt(lineNumberAttrLen); |
| 610 dos.writeShort((short) lineNumberTable.length); | |
| 611 for (int l = 0; l < lineNumberTable.length; l++) { | |
| 612 dos.writeShort((short) lineNumberTable[l].getStartBCI()); | |
| 613 dos.writeShort((short) lineNumberTable[l].getLineNumber()); | |
| 614 } | |
| 615 } | |
| 616 | |
| 617 // write LocalVariableTable, if available. | |
| 618 if (hasLocalVariableTable) { | |
| 705 | 619 writeIndex((short) _localVariableTableIndex); |
| 0 | 620 dos.writeInt(localVarAttrLen); |
| 621 dos.writeShort((short) localVariableTable.length); | |
| 622 for (int l = 0; l < localVariableTable.length; l++) { | |
| 623 dos.writeShort((short) localVariableTable[l].getStartBCI()); | |
| 624 dos.writeShort((short) localVariableTable[l].getLength()); | |
| 625 dos.writeShort((short) localVariableTable[l].getNameCPIndex()); | |
| 626 dos.writeShort((short) localVariableTable[l].getDescriptorCPIndex()); | |
| 627 dos.writeShort((short) localVariableTable[l].getSlot()); | |
| 628 } | |
| 629 } | |
| 630 } | |
| 631 | |
| 705 | 632 if (hasCheckedExceptions) { |
| 633 CheckedExceptionElement[] exceptions = m.getCheckedExceptions(); | |
| 634 writeIndex(_exceptionsIndex); | |
| 635 | |
| 636 int attrSize = 2 /* number_of_exceptions */ + | |
| 637 exceptions.length * 2 /* exception_index */; | |
| 638 dos.writeInt(attrSize); | |
| 639 dos.writeShort(exceptions.length); | |
| 640 if (DEBUG) debugMessage("\tmethod has " + exceptions.length | |
| 641 + " checked exception(s)"); | |
| 642 for (int e = 0; e < exceptions.length; e++) { | |
| 643 short cpIndex = (short) exceptions[e].getClassCPIndex(); | |
| 644 dos.writeShort(cpIndex); | |
| 645 } | |
| 646 } | |
| 647 | |
| 0 | 648 if (isGeneric) { |
| 649 writeGenericSignature(m.getGenericSignature().asString()); | |
| 650 } | |
| 651 } | |
| 652 | |
| 653 protected void rewriteByteCode(Method m, byte[] code) { | |
| 654 ByteCodeRewriter r = new ByteCodeRewriter(m, cpool, code); | |
| 655 r.rewrite(); | |
| 656 } | |
| 657 | |
| 658 protected void writeGenericSignature(String signature) throws IOException { | |
| 705 | 659 writeIndex(_signatureIndex); |
| 0 | 660 if (DEBUG) debugMessage("signature attribute = " + _signatureIndex); |
| 661 dos.writeInt(2); | |
| 662 Short index = (Short) utf8ToIndex.get(signature); | |
| 663 dos.writeShort(index.shortValue()); | |
| 664 if (DEBUG) debugMessage("generic signature = " + index); | |
| 665 } | |
| 666 | |
| 667 protected void writeClassAttributes() throws IOException { | |
| 668 final long flags = klass.getAccessFlags(); | |
| 705 | 669 final boolean hasSyn = hasSyntheticAttribute((short) flags); |
| 0 | 670 |
| 671 // check for source file | |
| 672 short classAttributeCount = 0; | |
| 673 | |
| 705 | 674 if (hasSyn) |
| 0 | 675 classAttributeCount++; |
| 676 | |
| 677 Symbol sourceFileName = klass.getSourceFileName(); | |
| 678 if (sourceFileName != null) | |
| 679 classAttributeCount++; | |
| 680 | |
| 681 Symbol genericSignature = klass.getGenericSignature(); | |
| 682 if (genericSignature != null) | |
| 683 classAttributeCount++; | |
| 684 | |
| 685 TypeArray innerClasses = klass.getInnerClasses(); | |
| 686 final int numInnerClasses = (int) (innerClasses.getLength() / 4); | |
| 687 if (numInnerClasses != 0) | |
| 688 classAttributeCount++; | |
| 689 | |
| 690 dos.writeShort(classAttributeCount); | |
| 691 if (DEBUG) debugMessage("class attribute count = " + classAttributeCount); | |
| 692 | |
| 705 | 693 if (hasSyn) |
| 0 | 694 writeSynthetic(); |
| 695 | |
| 696 // write SourceFile, if any | |
| 697 if (sourceFileName != null) { | |
| 705 | 698 writeIndex(_sourceFileIndex); |
| 0 | 699 if (DEBUG) debugMessage("source file attribute = " + _sourceFileIndex); |
| 700 dos.writeInt(2); | |
| 701 Short index = (Short) utf8ToIndex.get(sourceFileName.asString()); | |
| 702 dos.writeShort(index.shortValue()); | |
| 703 if (DEBUG) debugMessage("source file name = " + index); | |
| 704 } | |
| 705 | |
| 706 // write Signature, if any | |
| 707 if (genericSignature != null) { | |
| 708 writeGenericSignature(genericSignature.asString()); | |
| 709 } | |
| 710 | |
| 711 // write inner classes, if any | |
| 712 if (numInnerClasses != 0) { | |
| 705 | 713 writeIndex(_innerClassesIndex); |
| 0 | 714 final int innerAttrLen = 2 /* number_of_inner_classes */ + |
| 715 numInnerClasses * ( | |
| 716 2 /* inner_class_info_index */ + | |
| 717 2 /* outer_class_info_index */ + | |
| 718 2 /* inner_class_name_index */ + | |
| 719 2 /* inner_class_access_flags */); | |
| 720 dos.writeInt(innerAttrLen); | |
| 721 | |
| 722 dos.writeShort(numInnerClasses); | |
| 723 if (DEBUG) debugMessage("class has " + numInnerClasses + " inner class entries"); | |
| 724 | |
| 725 for (int index = 0; index < numInnerClasses * 4; index++) { | |
| 726 dos.writeShort(innerClasses.getShortAt(index)); | |
| 727 } | |
| 728 } | |
| 729 } | |
| 730 } |