Mercurial > hg > graal-jvmci-8
annotate agent/src/share/classes/sun/jvm/hotspot/tools/jcore/ClassWriter.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 | 8150fa46d2ed |
| children | 7a40901e0d5c |
| 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.tools.jcore; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.oops.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
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31 import sun.jvm.hotspot.utilities.*; |
| 0 | 32 |
| 33 public class ClassWriter implements /* imports */ ClassConstants | |
| 34 { | |
| 35 public static final boolean DEBUG = false; | |
| 36 | |
| 37 protected void debugMessage(String message) { | |
| 38 System.out.println(message); | |
| 39 } | |
| 40 | |
| 41 protected InstanceKlass klass; | |
| 42 protected DataOutputStream dos; | |
| 43 protected ConstantPool cpool; | |
| 44 | |
| 45 // Map between class name to index of type CONSTANT_Class | |
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46 protected Map<String, Short> classToIndex = new HashMap<String, Short>(); |
| 0 | 47 |
| 48 // Map between any modified UTF-8 and it's constant pool index. | |
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49 protected Map<String, Short> utf8ToIndex = new HashMap<String, Short>(); |
| 0 | 50 |
| 51 // constant pool index for attribute names. | |
| 52 | |
| 53 protected short _sourceFileIndex; | |
| 54 protected short _innerClassesIndex; | |
| 55 protected short _syntheticIndex; | |
| 56 protected short _deprecatedIndex; | |
| 57 protected short _constantValueIndex; | |
| 58 protected short _codeIndex; | |
| 59 protected short _exceptionsIndex; | |
| 60 protected short _lineNumberTableIndex; | |
| 61 protected short _localVariableTableIndex; | |
| 62 protected short _signatureIndex; | |
| 63 | |
| 64 protected static int extractHighShortFromInt(int val) { | |
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65 // must stay in sync with ConstantPool::name_and_type_at_put, method_at_put, etc. |
| 0 | 66 return (val >> 16) & 0xFFFF; |
| 67 } | |
| 68 | |
| 69 protected static int extractLowShortFromInt(int val) { | |
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70 // must stay in sync with ConstantPool::name_and_type_at_put, method_at_put, etc. |
| 0 | 71 return val & 0xFFFF; |
| 72 } | |
| 73 | |
| 74 public ClassWriter(InstanceKlass kls, OutputStream os) { | |
| 75 klass = kls; | |
| 76 dos = new DataOutputStream(os); | |
| 77 cpool = klass.getConstants(); | |
| 78 } | |
| 79 | |
| 80 public void write() throws IOException { | |
| 81 if (DEBUG) debugMessage("class name = " + klass.getName().asString()); | |
| 82 | |
| 83 // write magic | |
| 84 dos.writeInt(0xCAFEBABE); | |
| 85 | |
| 705 | 86 writeVersion(); |
| 0 | 87 writeConstantPool(); |
| 88 writeClassAccessFlags(); | |
| 89 writeThisClass(); | |
| 90 writeSuperClass(); | |
| 91 writeInterfaces(); | |
| 92 writeFields(); | |
| 93 writeMethods(); | |
| 94 writeClassAttributes(); | |
| 95 | |
| 96 // flush output | |
| 97 dos.flush(); | |
| 98 } | |
| 99 | |
| 705 | 100 protected void writeVersion() throws IOException { |
| 101 dos.writeShort((short)klass.minorVersion()); | |
| 102 dos.writeShort((short)klass.majorVersion()); | |
| 0 | 103 } |
| 104 | |
| 705 | 105 protected void writeIndex(int index) throws IOException { |
| 106 if (index == 0) throw new InternalError(); | |
| 107 dos.writeShort(index); | |
| 0 | 108 } |
| 109 | |
| 110 protected void writeConstantPool() throws IOException { | |
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111 final U1Array tags = cpool.getTags(); |
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112 final long len = tags.length(); |
| 0 | 113 dos.writeShort((short) len); |
| 114 | |
| 115 if (DEBUG) debugMessage("constant pool length = " + len); | |
| 116 | |
| 117 int ci = 0; // constant pool index | |
| 118 | |
| 119 // collect all modified UTF-8 Strings from Constant Pool | |
| 120 | |
| 121 for (ci = 1; ci < len; ci++) { | |
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122 int cpConstType = tags.at(ci); |
| 0 | 123 if(cpConstType == JVM_CONSTANT_Utf8) { |
| 124 Symbol sym = cpool.getSymbolAt(ci); | |
| 125 utf8ToIndex.put(sym.asString(), new Short((short) ci)); | |
| 126 } | |
| 127 else if(cpConstType == JVM_CONSTANT_Long || | |
| 128 cpConstType == JVM_CONSTANT_Double) { | |
| 129 ci++; | |
| 130 } | |
| 131 } | |
| 132 | |
| 133 // remember index of attribute name modified UTF-8 strings | |
| 134 | |
| 135 // class attributes | |
| 136 Short sourceFileIndex = (Short) utf8ToIndex.get("SourceFile"); | |
| 137 _sourceFileIndex = (sourceFileIndex != null)? sourceFileIndex.shortValue() : 0; | |
| 138 if (DEBUG) debugMessage("SourceFile index = " + _sourceFileIndex); | |
| 139 | |
| 140 Short innerClassesIndex = (Short) utf8ToIndex.get("InnerClasses"); | |
| 141 _innerClassesIndex = (innerClassesIndex != null)? innerClassesIndex.shortValue() : 0; | |
| 142 if (DEBUG) debugMessage("InnerClasses index = " + _innerClassesIndex); | |
| 143 | |
| 144 // field attributes | |
| 145 Short constantValueIndex = (Short) utf8ToIndex.get("ConstantValue"); | |
| 146 _constantValueIndex = (constantValueIndex != null)? | |
| 147 constantValueIndex.shortValue() : 0; | |
| 148 if (DEBUG) debugMessage("ConstantValue index = " + _constantValueIndex); | |
| 149 | |
| 150 Short syntheticIndex = (Short) utf8ToIndex.get("Synthetic"); | |
| 151 _syntheticIndex = (syntheticIndex != null)? syntheticIndex.shortValue() : 0; | |
| 152 if (DEBUG) debugMessage("Synthetic index = " + _syntheticIndex); | |
| 153 | |
| 154 Short deprecatedIndex = (Short) utf8ToIndex.get("Deprecated"); | |
| 155 _deprecatedIndex = (deprecatedIndex != null)? deprecatedIndex.shortValue() : 0; | |
| 156 if (DEBUG) debugMessage("Deprecated index = " + _deprecatedIndex); | |
| 157 | |
| 158 // method attributes | |
| 159 Short codeIndex = (Short) utf8ToIndex.get("Code"); | |
| 160 _codeIndex = (codeIndex != null)? codeIndex.shortValue() : 0; | |
| 161 if (DEBUG) debugMessage("Code index = " + _codeIndex); | |
| 162 | |
| 163 Short exceptionsIndex = (Short) utf8ToIndex.get("Exceptions"); | |
| 164 _exceptionsIndex = (exceptionsIndex != null)? exceptionsIndex.shortValue() : 0; | |
| 165 if (DEBUG) debugMessage("Exceptions index = " + _exceptionsIndex); | |
| 166 | |
| 167 // Short syntheticIndex = (Short) utf8ToIndex.get("Synthetic"); | |
| 168 // Short deprecatedIndex = (Short) utf8ToIndex.get("Deprecated"); | |
| 169 | |
| 170 // Code attributes | |
| 171 Short lineNumberTableIndex = (Short) utf8ToIndex.get("LineNumberTable"); | |
| 172 _lineNumberTableIndex = (lineNumberTableIndex != null)? | |
| 173 lineNumberTableIndex.shortValue() : 0; | |
| 174 if (DEBUG) debugMessage("LineNumberTable index = " + _lineNumberTableIndex); | |
| 175 | |
| 176 Short localVariableTableIndex = (Short) utf8ToIndex.get("LocalVariableTable"); | |
| 177 _localVariableTableIndex = (localVariableTableIndex != null)? | |
| 178 localVariableTableIndex.shortValue() : 0; | |
| 179 if (DEBUG) debugMessage("LocalVariableTable index = " + _localVariableTableIndex); | |
| 180 | |
| 181 Short signatureIdx = (Short) utf8ToIndex.get("Signature"); | |
| 182 _signatureIndex = (signatureIdx != null)? signatureIdx.shortValue() : 0; | |
| 183 if (DEBUG) debugMessage("Signature index = " + _signatureIndex); | |
| 184 | |
| 185 for(ci = 1; ci < len; ci++) { | |
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186 int cpConstType = tags.at(ci); |
| 0 | 187 // write cp_info |
| 188 // write constant type | |
| 189 switch(cpConstType) { | |
| 190 case JVM_CONSTANT_Utf8: { | |
| 191 dos.writeByte(cpConstType); | |
| 192 Symbol sym = cpool.getSymbolAt(ci); | |
| 193 dos.writeShort((short)sym.getLength()); | |
| 194 dos.write(sym.asByteArray()); | |
| 195 if (DEBUG) debugMessage("CP[" + ci + "] = modified UTF-8 " + sym.asString()); | |
| 196 break; | |
| 197 } | |
| 198 | |
| 199 case JVM_CONSTANT_Unicode: | |
| 200 throw new IllegalArgumentException("Unicode constant!"); | |
| 201 | |
| 202 case JVM_CONSTANT_Integer: | |
| 203 dos.writeByte(cpConstType); | |
| 204 dos.writeInt(cpool.getIntAt(ci)); | |
| 205 if (DEBUG) debugMessage("CP[" + ci + "] = int " + cpool.getIntAt(ci)); | |
| 206 break; | |
| 207 | |
| 208 case JVM_CONSTANT_Float: | |
| 209 dos.writeByte(cpConstType); | |
| 210 dos.writeFloat(cpool.getFloatAt(ci)); | |
| 211 if (DEBUG) debugMessage("CP[" + ci + "] = float " + cpool.getFloatAt(ci)); | |
| 212 break; | |
| 213 | |
| 214 case JVM_CONSTANT_Long: { | |
| 215 dos.writeByte(cpConstType); | |
| 216 long l = cpool.getLongAt(ci); | |
| 217 // long entries occupy two pool entries | |
| 218 ci++; | |
| 219 dos.writeLong(l); | |
| 220 break; | |
| 221 } | |
| 222 | |
| 223 case JVM_CONSTANT_Double: | |
| 224 dos.writeByte(cpConstType); | |
| 225 dos.writeDouble(cpool.getDoubleAt(ci)); | |
| 226 // double entries occupy two pool entries | |
| 227 ci++; | |
| 228 break; | |
| 229 | |
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230 case JVM_CONSTANT_Class: |
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231 case JVM_CONSTANT_UnresolvedClass: |
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232 case JVM_CONSTANT_UnresolvedClassInError: { |
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233 dos.writeByte(JVM_CONSTANT_Class); |
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234 String klassName = cpool.getKlassNameAt(ci).asString(); |
| 0 | 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_String: { | |
| 243 dos.writeByte(cpConstType); | |
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244 String str = cpool.getUnresolvedStringAt(ci).asString(); |
| 0 | 245 Short s = (Short) utf8ToIndex.get(str); |
| 246 dos.writeShort(s.shortValue()); | |
| 247 if (DEBUG) debugMessage("CP[" + ci + "] = string " + s); | |
| 248 break; | |
| 249 } | |
| 250 | |
| 251 // all external, internal method/field references | |
| 252 case JVM_CONSTANT_Fieldref: | |
| 253 case JVM_CONSTANT_Methodref: | |
| 254 case JVM_CONSTANT_InterfaceMethodref: { | |
| 255 dos.writeByte(cpConstType); | |
| 256 int value = cpool.getIntAt(ci); | |
| 257 short klassIndex = (short) extractLowShortFromInt(value); | |
| 258 short nameAndTypeIndex = (short) extractHighShortFromInt(value); | |
| 259 dos.writeShort(klassIndex); | |
| 260 dos.writeShort(nameAndTypeIndex); | |
| 261 if (DEBUG) debugMessage("CP[" + ci + "] = ref klass = " + | |
| 262 klassIndex + ", N&T = " + nameAndTypeIndex); | |
| 263 break; | |
| 264 } | |
| 265 | |
| 266 case JVM_CONSTANT_NameAndType: { | |
| 267 dos.writeByte(cpConstType); | |
| 268 int value = cpool.getIntAt(ci); | |
| 269 short nameIndex = (short) extractLowShortFromInt(value); | |
| 270 short signatureIndex = (short) extractHighShortFromInt(value); | |
| 271 dos.writeShort(nameIndex); | |
| 272 dos.writeShort(signatureIndex); | |
| 273 if (DEBUG) debugMessage("CP[" + ci + "] = N&T name = " + nameIndex | |
| 274 + ", type = " + signatureIndex); | |
| 275 break; | |
| 276 } | |
| 1602 | 277 |
| 278 case JVM_CONSTANT_MethodHandle: { | |
| 279 dos.writeByte(cpConstType); | |
| 280 int value = cpool.getIntAt(ci); | |
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281 byte refKind = (byte) extractLowShortFromInt(value); |
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282 short memberIndex = (short) extractHighShortFromInt(value); |
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283 dos.writeByte(refKind); |
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284 dos.writeShort(memberIndex); |
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285 if (DEBUG) debugMessage("CP[" + ci + "] = MH kind = " + |
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286 refKind + ", mem = " + memberIndex); |
| 1602 | 287 break; |
| 288 } | |
| 289 | |
| 290 case JVM_CONSTANT_MethodType: { | |
| 291 dos.writeByte(cpConstType); | |
| 292 int value = cpool.getIntAt(ci); | |
| 293 short refIndex = (short) value; | |
| 294 dos.writeShort(refIndex); | |
| 295 if (DEBUG) debugMessage("CP[" + ci + "] = MT index = " + refIndex); | |
| 296 break; | |
| 297 } | |
| 298 | |
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299 case JVM_CONSTANT_InvokeDynamic: { |
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300 dos.writeByte(cpConstType); |
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301 int value = cpool.getIntAt(ci); |
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302 short bsmIndex = (short) extractLowShortFromInt(value); |
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303 short nameAndTypeIndex = (short) extractHighShortFromInt(value); |
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304 dos.writeShort(bsmIndex); |
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305 dos.writeShort(nameAndTypeIndex); |
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306 if (DEBUG) debugMessage("CP[" + ci + "] = INDY bsm = " + |
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307 bsmIndex + ", N&T = " + nameAndTypeIndex); |
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308 break; |
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309 } |
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310 |
| 1385 | 311 default: |
| 312 throw new InternalError("Unknown tag: " + cpConstType); | |
| 0 | 313 } // switch |
| 314 } | |
| 315 } | |
| 316 | |
| 317 protected void writeClassAccessFlags() throws IOException { | |
| 318 int flags = (int)(klass.getAccessFlags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
| 319 dos.writeShort((short)flags); | |
| 320 } | |
| 321 | |
| 322 protected void writeThisClass() throws IOException { | |
| 323 String klassName = klass.getName().asString(); | |
| 324 Short index = (Short) classToIndex.get(klassName); | |
| 325 dos.writeShort(index.shortValue()); | |
| 326 if (DEBUG) debugMessage("this class = " + index); | |
| 327 } | |
| 328 | |
| 329 protected void writeSuperClass() throws IOException { | |
| 330 Klass superKlass = klass.getSuper(); | |
| 331 if (superKlass != null) { // is not java.lang.Object | |
| 332 String superName = superKlass.getName().asString(); | |
| 333 Short index = (Short) classToIndex.get(superName); | |
| 334 if (DEBUG) debugMessage("super class = " + index); | |
| 335 dos.writeShort(index.shortValue()); | |
| 336 } else { | |
| 337 dos.writeShort(0); // no super class | |
| 338 } | |
| 339 } | |
| 340 protected void writeInterfaces() throws IOException { | |
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341 KlassArray interfaces = klass.getLocalInterfaces(); |
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342 final int len = interfaces.length(); |
| 0 | 343 |
| 344 if (DEBUG) debugMessage("number of interfaces = " + len); | |
| 345 | |
| 346 // write interfaces count | |
| 347 dos.writeShort((short) len); | |
| 348 for (int i = 0; i < len; i++) { | |
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349 Klass k = interfaces.getAt(i); |
| 0 | 350 Short index = (Short) classToIndex.get(k.getName().asString()); |
| 351 dos.writeShort(index.shortValue()); | |
| 352 if (DEBUG) debugMessage("\t" + index); | |
| 353 } | |
| 354 } | |
| 355 | |
| 356 protected void writeFields() throws IOException { | |
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357 U2Array fields = klass.getFields(); |
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358 final int length = (int) fields.length(); |
| 0 | 359 |
| 360 // write number of fields | |
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361 dos.writeShort((short) length); |
| 0 | 362 |
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363 if (DEBUG) debugMessage("number of fields = " + length); |
| 0 | 364 |
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365 for (int index = 0; index < length; index++) { |
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366 short accessFlags = klass.getFieldAccessFlags(index); |
| 0 | 367 dos.writeShort(accessFlags & (short) JVM_RECOGNIZED_FIELD_MODIFIERS); |
| 368 | |
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369 short nameIndex = klass.getFieldNameIndex(index); |
| 0 | 370 dos.writeShort(nameIndex); |
| 371 | |
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372 short signatureIndex = klass.getFieldSignatureIndex(index); |
| 0 | 373 dos.writeShort(signatureIndex); |
| 374 if (DEBUG) debugMessage("\tfield name = " + nameIndex + ", signature = " + signatureIndex); | |
| 375 | |
| 376 short fieldAttributeCount = 0; | |
| 705 | 377 boolean hasSyn = hasSyntheticAttribute(accessFlags); |
| 378 if (hasSyn) | |
| 0 | 379 fieldAttributeCount++; |
| 380 | |
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381 short initvalIndex = klass.getFieldInitialValueIndex(index); |
| 0 | 382 if (initvalIndex != 0) |
| 383 fieldAttributeCount++; | |
| 384 | |
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385 short genSigIndex = klass.getFieldGenericSignatureIndex(index); |
| 0 | 386 if (genSigIndex != 0) |
| 387 fieldAttributeCount++; | |
| 388 | |
| 389 dos.writeShort(fieldAttributeCount); | |
| 390 | |
| 391 // write synthetic, if applicable | |
| 705 | 392 if (hasSyn) |
| 0 | 393 writeSynthetic(); |
| 394 | |
| 395 if (initvalIndex != 0) { | |
| 705 | 396 writeIndex(_constantValueIndex); |
| 0 | 397 dos.writeInt(2); |
| 398 dos.writeShort(initvalIndex); | |
| 399 if (DEBUG) debugMessage("\tfield init value = " + initvalIndex); | |
| 400 } | |
| 401 | |
| 402 if (genSigIndex != 0) { | |
| 705 | 403 writeIndex(_signatureIndex); |
| 0 | 404 dos.writeInt(2); |
| 405 dos.writeShort(genSigIndex); | |
| 406 if (DEBUG) debugMessage("\tfield generic signature index " + genSigIndex); | |
| 407 } | |
| 408 } | |
| 409 } | |
| 410 | |
| 411 protected boolean isSynthetic(short accessFlags) { | |
| 412 return (accessFlags & (short) JVM_ACC_SYNTHETIC) != 0; | |
| 413 } | |
| 414 | |
| 705 | 415 protected boolean hasSyntheticAttribute(short accessFlags) { |
| 416 // Check if flags have the attribute and if the constant pool contains an entry for it. | |
| 417 return isSynthetic(accessFlags) && _syntheticIndex != 0; | |
| 418 } | |
| 419 | |
| 0 | 420 protected void writeSynthetic() throws IOException { |
| 705 | 421 writeIndex(_syntheticIndex); |
| 0 | 422 dos.writeInt(0); |
| 423 } | |
| 424 | |
| 425 protected void writeMethods() throws IOException { | |
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426 MethodArray methods = klass.getMethods(); |
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427 final int len = methods.length(); |
| 0 | 428 // write number of methods |
| 429 dos.writeShort((short) len); | |
| 430 if (DEBUG) debugMessage("number of methods = " + len); | |
| 431 for (int m = 0; m < len; m++) { | |
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432 writeMethod(methods.at(m)); |
| 0 | 433 } |
| 434 } | |
| 435 | |
| 436 protected void writeMethod(Method m) throws IOException { | |
| 437 long accessFlags = m.getAccessFlags(); | |
| 438 dos.writeShort((short) (accessFlags & JVM_RECOGNIZED_METHOD_MODIFIERS)); | |
| 439 dos.writeShort((short) m.getNameIndex()); | |
| 440 dos.writeShort((short) m.getSignatureIndex()); | |
| 441 if (DEBUG) debugMessage("\tmethod name = " + m.getNameIndex() + ", signature = " | |
| 442 + m.getSignatureIndex()); | |
| 443 | |
| 444 final boolean isNative = ((accessFlags & JVM_ACC_NATIVE) != 0); | |
| 445 final boolean isAbstract = ((accessFlags & JVM_ACC_ABSTRACT) != 0); | |
| 446 | |
| 447 short methodAttributeCount = 0; | |
| 448 | |
| 705 | 449 final boolean hasSyn = hasSyntheticAttribute((short)accessFlags); |
| 450 if (hasSyn) | |
| 0 | 451 methodAttributeCount++; |
| 452 | |
| 453 final boolean hasCheckedExceptions = m.hasCheckedExceptions(); | |
| 454 if (hasCheckedExceptions) | |
| 455 methodAttributeCount++; | |
| 456 | |
| 457 final boolean isCodeAvailable = (!isNative) && (!isAbstract); | |
| 458 if (isCodeAvailable) | |
| 459 methodAttributeCount++; | |
| 460 | |
| 461 final boolean isGeneric = (m.getGenericSignature() != null); | |
| 462 if (isGeneric) | |
| 463 methodAttributeCount++; | |
| 464 | |
| 465 dos.writeShort(methodAttributeCount); | |
| 466 if (DEBUG) debugMessage("\tmethod attribute count = " + methodAttributeCount); | |
| 467 | |
| 705 | 468 if (hasSyn) { |
| 0 | 469 if (DEBUG) debugMessage("\tmethod is synthetic"); |
| 470 writeSynthetic(); | |
| 471 } | |
| 472 | |
| 473 if (isCodeAvailable) { | |
| 474 byte[] code = m.getByteCode(); | |
| 475 short codeAttrCount = 0; | |
| 476 int codeSize = 2 /* max_stack */ + | |
| 477 2 /* max_locals */ + | |
| 478 4 /* code_length */ + | |
| 479 code.length /* code */ + | |
| 480 2 /* exp. table len. */ + | |
| 481 2 /* code attr. count */; | |
| 482 | |
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483 boolean hasExceptionTable = m.hasExceptionTable(); |
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484 ExceptionTableElement[] exceptionTable = null; |
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485 int exceptionTableLen = 0; |
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486 if (hasExceptionTable) { |
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487 exceptionTable = m.getExceptionTable(); |
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488 exceptionTableLen = exceptionTable.length; |
| 0 | 489 if (DEBUG) debugMessage("\tmethod has exception table"); |
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490 codeSize += exceptionTableLen /* exception table is 4-tuple array */ |
| 0 | 491 * (2 /* start_pc */ + |
| 492 2 /* end_pc */ + | |
| 493 2 /* handler_pc */ + | |
| 494 2 /* catch_type */); | |
| 495 } | |
| 496 | |
| 497 boolean hasLineNumberTable = m.hasLineNumberTable(); | |
| 498 LineNumberTableElement[] lineNumberTable = null; | |
| 499 int lineNumberAttrLen = 0; | |
| 500 | |
| 501 if (hasLineNumberTable) { | |
| 502 if (DEBUG) debugMessage("\tmethod has line number table"); | |
| 503 lineNumberTable = m.getLineNumberTable(); | |
| 504 if (DEBUG) debugMessage("\t\tline table length = " + lineNumberTable.length); | |
| 505 | |
| 506 lineNumberAttrLen = 2 /* line number table length */ + | |
| 507 lineNumberTable.length * (2 /* start_pc */ + 2 /* line_number */); | |
| 508 | |
| 509 codeSize += 2 /* line number table attr index */ + | |
| 510 4 /* line number table attr length */ + | |
| 511 lineNumberAttrLen; | |
| 512 | |
| 513 if (DEBUG) debugMessage("\t\tline number table attr size = " + | |
| 514 lineNumberAttrLen); | |
| 515 | |
| 516 codeAttrCount++; | |
| 517 } | |
| 518 | |
| 519 boolean hasLocalVariableTable = m.hasLocalVariableTable(); | |
| 520 LocalVariableTableElement[] localVariableTable = null; | |
| 521 int localVarAttrLen = 0; | |
| 522 | |
| 523 if (hasLocalVariableTable) { | |
| 524 if (DEBUG) debugMessage("\tmethod has local variable table"); | |
| 525 localVariableTable = m.getLocalVariableTable(); | |
| 526 if (DEBUG) debugMessage("\t\tlocal variable table length = " | |
| 527 + localVariableTable.length); | |
| 528 localVarAttrLen = | |
| 529 2 /* local variable table length */ + | |
| 530 localVariableTable.length * ( 2 /* start_pc */ + | |
| 531 2 /* length */ + | |
| 532 2 /* name_index */ + | |
| 533 2 /* signature_index */ + | |
| 534 2 /* variable index */ ); | |
| 535 | |
| 536 if (DEBUG) debugMessage("\t\tlocal variable attr size = " + | |
| 537 localVarAttrLen); | |
| 538 | |
| 539 codeSize += 2 /* local variable table attr index */ + | |
| 540 4 /* local variable table attr length */ + | |
| 541 localVarAttrLen; | |
| 542 | |
| 543 codeAttrCount++; | |
| 544 } | |
| 545 | |
| 546 // fix ConstantPoolCache indices to ConstantPool indices. | |
| 547 rewriteByteCode(m, code); | |
| 548 | |
| 549 // start writing Code | |
| 550 | |
| 705 | 551 writeIndex(_codeIndex); |
| 0 | 552 |
| 553 dos.writeInt(codeSize); | |
| 554 if (DEBUG) debugMessage("\tcode attribute length = " + codeSize); | |
| 555 | |
| 556 dos.writeShort((short) m.getMaxStack()); | |
| 557 if (DEBUG) debugMessage("\tmax stack = " + m.getMaxStack()); | |
| 558 | |
| 559 dos.writeShort((short) m.getMaxLocals()); | |
| 560 if (DEBUG) debugMessage("\tmax locals = " + m.getMaxLocals()); | |
| 561 | |
| 562 dos.writeInt(code.length); | |
| 563 if (DEBUG) debugMessage("\tcode size = " + code.length); | |
| 564 | |
| 565 dos.write(code); | |
| 566 | |
| 567 // write exception table size | |
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568 dos.writeShort((short) exceptionTableLen); |
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569 if (DEBUG) debugMessage("\texception table length = " + exceptionTableLen); |
| 0 | 570 |
| 571 if (exceptionTableLen != 0) { | |
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572 for (int e = 0; e < exceptionTableLen; e++) { |
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573 dos.writeShort((short) exceptionTable[e].getStartPC()); |
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574 dos.writeShort((short) exceptionTable[e].getEndPC()); |
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575 dos.writeShort((short) exceptionTable[e].getHandlerPC()); |
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576 dos.writeShort((short) exceptionTable[e].getCatchTypeIndex()); |
| 0 | 577 } |
| 578 } | |
| 579 | |
| 580 dos.writeShort((short)codeAttrCount); | |
| 581 if (DEBUG) debugMessage("\tcode attribute count = " + codeAttrCount); | |
| 582 | |
| 583 // write LineNumberTable, if available. | |
| 584 if (hasLineNumberTable) { | |
| 705 | 585 writeIndex(_lineNumberTableIndex); |
| 0 | 586 dos.writeInt(lineNumberAttrLen); |
| 587 dos.writeShort((short) lineNumberTable.length); | |
| 588 for (int l = 0; l < lineNumberTable.length; l++) { | |
| 589 dos.writeShort((short) lineNumberTable[l].getStartBCI()); | |
| 590 dos.writeShort((short) lineNumberTable[l].getLineNumber()); | |
| 591 } | |
| 592 } | |
| 593 | |
| 594 // write LocalVariableTable, if available. | |
| 595 if (hasLocalVariableTable) { | |
| 705 | 596 writeIndex((short) _localVariableTableIndex); |
| 0 | 597 dos.writeInt(localVarAttrLen); |
| 598 dos.writeShort((short) localVariableTable.length); | |
| 599 for (int l = 0; l < localVariableTable.length; l++) { | |
| 600 dos.writeShort((short) localVariableTable[l].getStartBCI()); | |
| 601 dos.writeShort((short) localVariableTable[l].getLength()); | |
| 602 dos.writeShort((short) localVariableTable[l].getNameCPIndex()); | |
| 603 dos.writeShort((short) localVariableTable[l].getDescriptorCPIndex()); | |
| 604 dos.writeShort((short) localVariableTable[l].getSlot()); | |
| 605 } | |
| 606 } | |
| 607 } | |
| 608 | |
| 705 | 609 if (hasCheckedExceptions) { |
| 610 CheckedExceptionElement[] exceptions = m.getCheckedExceptions(); | |
| 611 writeIndex(_exceptionsIndex); | |
| 612 | |
| 613 int attrSize = 2 /* number_of_exceptions */ + | |
| 614 exceptions.length * 2 /* exception_index */; | |
| 615 dos.writeInt(attrSize); | |
| 616 dos.writeShort(exceptions.length); | |
| 617 if (DEBUG) debugMessage("\tmethod has " + exceptions.length | |
| 618 + " checked exception(s)"); | |
| 619 for (int e = 0; e < exceptions.length; e++) { | |
| 620 short cpIndex = (short) exceptions[e].getClassCPIndex(); | |
| 621 dos.writeShort(cpIndex); | |
| 622 } | |
| 623 } | |
| 624 | |
| 0 | 625 if (isGeneric) { |
| 626 writeGenericSignature(m.getGenericSignature().asString()); | |
| 627 } | |
| 628 } | |
| 629 | |
| 630 protected void rewriteByteCode(Method m, byte[] code) { | |
| 631 ByteCodeRewriter r = new ByteCodeRewriter(m, cpool, code); | |
| 632 r.rewrite(); | |
| 633 } | |
| 634 | |
| 635 protected void writeGenericSignature(String signature) throws IOException { | |
| 705 | 636 writeIndex(_signatureIndex); |
| 0 | 637 if (DEBUG) debugMessage("signature attribute = " + _signatureIndex); |
| 638 dos.writeInt(2); | |
| 639 Short index = (Short) utf8ToIndex.get(signature); | |
| 640 dos.writeShort(index.shortValue()); | |
| 641 if (DEBUG) debugMessage("generic signature = " + index); | |
| 642 } | |
| 643 | |
| 644 protected void writeClassAttributes() throws IOException { | |
| 645 final long flags = klass.getAccessFlags(); | |
| 705 | 646 final boolean hasSyn = hasSyntheticAttribute((short) flags); |
| 0 | 647 |
| 648 // check for source file | |
| 649 short classAttributeCount = 0; | |
| 650 | |
| 705 | 651 if (hasSyn) |
| 0 | 652 classAttributeCount++; |
| 653 | |
| 654 Symbol sourceFileName = klass.getSourceFileName(); | |
| 655 if (sourceFileName != null) | |
| 656 classAttributeCount++; | |
| 657 | |
| 658 Symbol genericSignature = klass.getGenericSignature(); | |
| 659 if (genericSignature != null) | |
| 660 classAttributeCount++; | |
| 661 | |
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662 U2Array innerClasses = klass.getInnerClasses(); |
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663 final int numInnerClasses = (int) (innerClasses.length() / 4); |
| 0 | 664 if (numInnerClasses != 0) |
| 665 classAttributeCount++; | |
| 666 | |
| 667 dos.writeShort(classAttributeCount); | |
| 668 if (DEBUG) debugMessage("class attribute count = " + classAttributeCount); | |
| 669 | |
| 705 | 670 if (hasSyn) |
| 0 | 671 writeSynthetic(); |
| 672 | |
| 673 // write SourceFile, if any | |
| 674 if (sourceFileName != null) { | |
| 705 | 675 writeIndex(_sourceFileIndex); |
| 0 | 676 if (DEBUG) debugMessage("source file attribute = " + _sourceFileIndex); |
| 677 dos.writeInt(2); | |
| 678 Short index = (Short) utf8ToIndex.get(sourceFileName.asString()); | |
| 679 dos.writeShort(index.shortValue()); | |
| 680 if (DEBUG) debugMessage("source file name = " + index); | |
| 681 } | |
| 682 | |
| 683 // write Signature, if any | |
| 684 if (genericSignature != null) { | |
| 685 writeGenericSignature(genericSignature.asString()); | |
| 686 } | |
| 687 | |
| 688 // write inner classes, if any | |
| 689 if (numInnerClasses != 0) { | |
| 705 | 690 writeIndex(_innerClassesIndex); |
| 0 | 691 final int innerAttrLen = 2 /* number_of_inner_classes */ + |
| 692 numInnerClasses * ( | |
| 693 2 /* inner_class_info_index */ + | |
| 694 2 /* outer_class_info_index */ + | |
| 695 2 /* inner_class_name_index */ + | |
| 696 2 /* inner_class_access_flags */); | |
| 697 dos.writeInt(innerAttrLen); | |
| 698 | |
| 699 dos.writeShort(numInnerClasses); | |
| 700 if (DEBUG) debugMessage("class has " + numInnerClasses + " inner class entries"); | |
| 701 | |
| 702 for (int index = 0; index < numInnerClasses * 4; index++) { | |
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703 dos.writeShort(innerClasses.at(index)); |
| 0 | 704 } |
| 705 } | |
| 706 } | |
| 707 } |