Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/tools/jcore/ClassWriter.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | 1f2abec69714 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 2002-2004 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
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 protected boolean is15Format; | |
44 | |
45 // Map between class name to index of type CONSTANT_Class | |
46 protected Map classToIndex = new HashMap(); | |
47 | |
48 // Map between any modified UTF-8 and it's constant pool index. | |
49 protected Map utf8ToIndex = new HashMap(); | |
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) { | |
65 return (val >> 16) & 0xFFFF; | |
66 } | |
67 | |
68 protected static int extractLowShortFromInt(int val) { | |
69 return val & 0xFFFF; | |
70 } | |
71 | |
72 public ClassWriter(InstanceKlass kls, OutputStream os) { | |
73 klass = kls; | |
74 dos = new DataOutputStream(os); | |
75 cpool = klass.getConstants(); | |
76 is15Format = is15ClassFile(); | |
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 | |
85 writeVersion(is15Format); | |
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 | |
99 protected boolean is15ClassFile() { | |
100 // if klass has generic signature, then it is 1.5 class file. | |
101 if (klass.getGenericSignature() != null) { | |
102 return true; | |
103 } | |
104 | |
105 // if atleast one method has generic signature | |
106 // , then we have 1.5 class file. | |
107 ObjArray methods = klass.getMethods(); | |
108 final int numMethods = (int) methods.getLength(); | |
109 for (int m = 0; m < numMethods; m++) { | |
110 Method curMethod = (Method) methods.getObjAt(m); | |
111 if (curMethod.getGenericSignature() != null) { | |
112 return true; | |
113 } | |
114 } | |
115 | |
116 // if atleast one field has non-zero generic signature index, then we have | |
117 // 1.5 class file | |
118 TypeArray fields = klass.getFields(); | |
119 final int numFields = (int) fields.getLength(); | |
120 for (int f = 0; f < numFields; f += InstanceKlass.NEXT_OFFSET) { | |
121 short genSigIndex = fields.getShortAt(f + InstanceKlass.GENERIC_SIGNATURE_INDEX_OFFSET); | |
122 if (genSigIndex != (short)0) return true; | |
123 } | |
124 | |
125 return false; | |
126 } | |
127 | |
128 protected void writeVersion(boolean is15Format) throws IOException { | |
129 if (is15Format) { | |
130 dos.writeShort(MINOR_VERSION); | |
131 dos.writeShort(MAJOR_VERSION); | |
132 } else { | |
133 dos.writeShort(MINOR_VERSION_OLD); | |
134 dos.writeShort(MAJOR_VERSION_OLD); | |
135 } | |
136 } | |
137 | |
138 protected void writeConstantPool() throws IOException { | |
139 final TypeArray tags = cpool.getTags(); | |
140 final long len = tags.getLength(); | |
141 dos.writeShort((short) len); | |
142 | |
143 if (DEBUG) debugMessage("constant pool length = " + len); | |
144 | |
145 int ci = 0; // constant pool index | |
146 | |
147 // collect all modified UTF-8 Strings from Constant Pool | |
148 | |
149 for (ci = 1; ci < len; ci++) { | |
150 byte cpConstType = tags.getByteAt(ci); | |
151 if(cpConstType == JVM_CONSTANT_Utf8) { | |
152 Symbol sym = cpool.getSymbolAt(ci); | |
153 utf8ToIndex.put(sym.asString(), new Short((short) ci)); | |
154 } | |
155 else if(cpConstType == JVM_CONSTANT_Long || | |
156 cpConstType == JVM_CONSTANT_Double) { | |
157 ci++; | |
158 } | |
159 } | |
160 | |
161 // remember index of attribute name modified UTF-8 strings | |
162 | |
163 // class attributes | |
164 Short sourceFileIndex = (Short) utf8ToIndex.get("SourceFile"); | |
165 _sourceFileIndex = (sourceFileIndex != null)? sourceFileIndex.shortValue() : 0; | |
166 if (DEBUG) debugMessage("SourceFile index = " + _sourceFileIndex); | |
167 | |
168 Short innerClassesIndex = (Short) utf8ToIndex.get("InnerClasses"); | |
169 _innerClassesIndex = (innerClassesIndex != null)? innerClassesIndex.shortValue() : 0; | |
170 if (DEBUG) debugMessage("InnerClasses index = " + _innerClassesIndex); | |
171 | |
172 // field attributes | |
173 Short constantValueIndex = (Short) utf8ToIndex.get("ConstantValue"); | |
174 _constantValueIndex = (constantValueIndex != null)? | |
175 constantValueIndex.shortValue() : 0; | |
176 if (DEBUG) debugMessage("ConstantValue index = " + _constantValueIndex); | |
177 | |
178 Short syntheticIndex = (Short) utf8ToIndex.get("Synthetic"); | |
179 _syntheticIndex = (syntheticIndex != null)? syntheticIndex.shortValue() : 0; | |
180 if (DEBUG) debugMessage("Synthetic index = " + _syntheticIndex); | |
181 | |
182 Short deprecatedIndex = (Short) utf8ToIndex.get("Deprecated"); | |
183 _deprecatedIndex = (deprecatedIndex != null)? deprecatedIndex.shortValue() : 0; | |
184 if (DEBUG) debugMessage("Deprecated index = " + _deprecatedIndex); | |
185 | |
186 // method attributes | |
187 Short codeIndex = (Short) utf8ToIndex.get("Code"); | |
188 _codeIndex = (codeIndex != null)? codeIndex.shortValue() : 0; | |
189 if (DEBUG) debugMessage("Code index = " + _codeIndex); | |
190 | |
191 Short exceptionsIndex = (Short) utf8ToIndex.get("Exceptions"); | |
192 _exceptionsIndex = (exceptionsIndex != null)? exceptionsIndex.shortValue() : 0; | |
193 if (DEBUG) debugMessage("Exceptions index = " + _exceptionsIndex); | |
194 | |
195 // Short syntheticIndex = (Short) utf8ToIndex.get("Synthetic"); | |
196 // Short deprecatedIndex = (Short) utf8ToIndex.get("Deprecated"); | |
197 | |
198 // Code attributes | |
199 Short lineNumberTableIndex = (Short) utf8ToIndex.get("LineNumberTable"); | |
200 _lineNumberTableIndex = (lineNumberTableIndex != null)? | |
201 lineNumberTableIndex.shortValue() : 0; | |
202 if (DEBUG) debugMessage("LineNumberTable index = " + _lineNumberTableIndex); | |
203 | |
204 Short localVariableTableIndex = (Short) utf8ToIndex.get("LocalVariableTable"); | |
205 _localVariableTableIndex = (localVariableTableIndex != null)? | |
206 localVariableTableIndex.shortValue() : 0; | |
207 if (DEBUG) debugMessage("LocalVariableTable index = " + _localVariableTableIndex); | |
208 | |
209 Short signatureIdx = (Short) utf8ToIndex.get("Signature"); | |
210 _signatureIndex = (signatureIdx != null)? signatureIdx.shortValue() : 0; | |
211 if (DEBUG) debugMessage("Signature index = " + _signatureIndex); | |
212 | |
213 for(ci = 1; ci < len; ci++) { | |
214 // write cp_info | |
215 // write constant type | |
216 byte cpConstType = tags.getByteAt(ci); | |
217 switch(cpConstType) { | |
218 case JVM_CONSTANT_Utf8: { | |
219 dos.writeByte(cpConstType); | |
220 Symbol sym = cpool.getSymbolAt(ci); | |
221 dos.writeShort((short)sym.getLength()); | |
222 dos.write(sym.asByteArray()); | |
223 if (DEBUG) debugMessage("CP[" + ci + "] = modified UTF-8 " + sym.asString()); | |
224 break; | |
225 } | |
226 | |
227 case JVM_CONSTANT_Unicode: | |
228 throw new IllegalArgumentException("Unicode constant!"); | |
229 | |
230 case JVM_CONSTANT_Integer: | |
231 dos.writeByte(cpConstType); | |
232 dos.writeInt(cpool.getIntAt(ci)); | |
233 if (DEBUG) debugMessage("CP[" + ci + "] = int " + cpool.getIntAt(ci)); | |
234 break; | |
235 | |
236 case JVM_CONSTANT_Float: | |
237 dos.writeByte(cpConstType); | |
238 dos.writeFloat(cpool.getFloatAt(ci)); | |
239 if (DEBUG) debugMessage("CP[" + ci + "] = float " + cpool.getFloatAt(ci)); | |
240 break; | |
241 | |
242 case JVM_CONSTANT_Long: { | |
243 dos.writeByte(cpConstType); | |
244 long l = cpool.getLongAt(ci); | |
245 // long entries occupy two pool entries | |
246 ci++; | |
247 dos.writeLong(l); | |
248 break; | |
249 } | |
250 | |
251 case JVM_CONSTANT_Double: | |
252 dos.writeByte(cpConstType); | |
253 dos.writeDouble(cpool.getDoubleAt(ci)); | |
254 // double entries occupy two pool entries | |
255 ci++; | |
256 break; | |
257 | |
258 case JVM_CONSTANT_Class: { | |
259 dos.writeByte(cpConstType); | |
260 // Klass already resolved. ConstantPool constains klassOop. | |
261 Klass refKls = (Klass) cpool.getObjAt(ci); | |
262 String klassName = refKls.getName().asString(); | |
263 | |
264 Short s = (Short) utf8ToIndex.get(klassName); | |
265 classToIndex.put(klassName, new Short((short)ci)); | |
266 dos.writeShort(s.shortValue()); | |
267 if (DEBUG) debugMessage("CP[" + ci + "] = class " + s); | |
268 break; | |
269 } | |
270 | |
271 // case JVM_CONSTANT_ClassIndex: | |
272 case JVM_CONSTANT_UnresolvedClass: { | |
273 dos.writeByte(JVM_CONSTANT_Class); | |
274 String klassName = cpool.getSymbolAt(ci).asString(); | |
275 | |
276 Short s = (Short) utf8ToIndex.get(klassName); | |
277 classToIndex.put(klassName, new Short((short) ci)); | |
278 | |
279 dos.writeShort(s.shortValue()); | |
280 if (DEBUG) debugMessage("CP[" + ci + "] = class " + s); | |
281 break; | |
282 } | |
283 | |
284 case JVM_CONSTANT_String: { | |
285 dos.writeByte(cpConstType); | |
286 String str = OopUtilities.stringOopToString(cpool.getObjAt(ci)); | |
287 Short s = (Short) utf8ToIndex.get(str); | |
288 dos.writeShort(s.shortValue()); | |
289 if (DEBUG) debugMessage("CP[" + ci + "] = string " + s); | |
290 break; | |
291 } | |
292 | |
293 // case JVM_CONSTANT_StringIndex: | |
294 case JVM_CONSTANT_UnresolvedString: { | |
295 dos.writeByte(JVM_CONSTANT_String); | |
296 String val = cpool.getSymbolAt(ci).asString(); | |
297 | |
298 Short s = (Short) utf8ToIndex.get(val); | |
299 dos.writeShort(s.shortValue()); | |
300 if (DEBUG) debugMessage("CP[" + ci + "] = string " + s); | |
301 break; | |
302 } | |
303 | |
304 // all external, internal method/field references | |
305 case JVM_CONSTANT_Fieldref: | |
306 case JVM_CONSTANT_Methodref: | |
307 case JVM_CONSTANT_InterfaceMethodref: { | |
308 dos.writeByte(cpConstType); | |
309 int value = cpool.getIntAt(ci); | |
310 short klassIndex = (short) extractLowShortFromInt(value); | |
311 short nameAndTypeIndex = (short) extractHighShortFromInt(value); | |
312 dos.writeShort(klassIndex); | |
313 dos.writeShort(nameAndTypeIndex); | |
314 if (DEBUG) debugMessage("CP[" + ci + "] = ref klass = " + | |
315 klassIndex + ", N&T = " + nameAndTypeIndex); | |
316 break; | |
317 } | |
318 | |
319 case JVM_CONSTANT_NameAndType: { | |
320 dos.writeByte(cpConstType); | |
321 int value = cpool.getIntAt(ci); | |
322 short nameIndex = (short) extractLowShortFromInt(value); | |
323 short signatureIndex = (short) extractHighShortFromInt(value); | |
324 dos.writeShort(nameIndex); | |
325 dos.writeShort(signatureIndex); | |
326 if (DEBUG) debugMessage("CP[" + ci + "] = N&T name = " + nameIndex | |
327 + ", type = " + signatureIndex); | |
328 break; | |
329 } | |
330 } // switch | |
331 } | |
332 } | |
333 | |
334 protected void writeClassAccessFlags() throws IOException { | |
335 int flags = (int)(klass.getAccessFlags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
336 dos.writeShort((short)flags); | |
337 } | |
338 | |
339 protected void writeThisClass() throws IOException { | |
340 String klassName = klass.getName().asString(); | |
341 Short index = (Short) classToIndex.get(klassName); | |
342 dos.writeShort(index.shortValue()); | |
343 if (DEBUG) debugMessage("this class = " + index); | |
344 } | |
345 | |
346 protected void writeSuperClass() throws IOException { | |
347 Klass superKlass = klass.getSuper(); | |
348 if (superKlass != null) { // is not java.lang.Object | |
349 String superName = superKlass.getName().asString(); | |
350 Short index = (Short) classToIndex.get(superName); | |
351 if (DEBUG) debugMessage("super class = " + index); | |
352 dos.writeShort(index.shortValue()); | |
353 } else { | |
354 dos.writeShort(0); // no super class | |
355 } | |
356 } | |
357 protected void writeInterfaces() throws IOException { | |
358 ObjArray interfaces = klass.getLocalInterfaces(); | |
359 final int len = (int) interfaces.getLength(); | |
360 | |
361 if (DEBUG) debugMessage("number of interfaces = " + len); | |
362 | |
363 // write interfaces count | |
364 dos.writeShort((short) len); | |
365 for (int i = 0; i < len; i++) { | |
366 Klass k = (Klass) interfaces.getObjAt(i); | |
367 Short index = (Short) classToIndex.get(k.getName().asString()); | |
368 dos.writeShort(index.shortValue()); | |
369 if (DEBUG) debugMessage("\t" + index); | |
370 } | |
371 } | |
372 | |
373 protected void writeFields() throws IOException { | |
374 TypeArray fields = klass.getFields(); | |
375 final int length = (int) fields.getLength(); | |
376 | |
377 // write number of fields | |
378 dos.writeShort((short) (length / InstanceKlass.NEXT_OFFSET) ); | |
379 | |
380 if (DEBUG) debugMessage("number of fields = " | |
381 + length/InstanceKlass.NEXT_OFFSET); | |
382 | |
383 for (int index = 0; index < length; index += InstanceKlass.NEXT_OFFSET) { | |
384 short accessFlags = fields.getShortAt(index + InstanceKlass.ACCESS_FLAGS_OFFSET); | |
385 dos.writeShort(accessFlags & (short) JVM_RECOGNIZED_FIELD_MODIFIERS); | |
386 | |
387 short nameIndex = fields.getShortAt(index + InstanceKlass.NAME_INDEX_OFFSET); | |
388 dos.writeShort(nameIndex); | |
389 | |
390 short signatureIndex = fields.getShortAt(index + InstanceKlass.SIGNATURE_INDEX_OFFSET); | |
391 dos.writeShort(signatureIndex); | |
392 if (DEBUG) debugMessage("\tfield name = " + nameIndex + ", signature = " + signatureIndex); | |
393 | |
394 short fieldAttributeCount = 0; | |
395 boolean isSyn = isSynthetic(accessFlags); | |
396 if (isSyn) | |
397 fieldAttributeCount++; | |
398 | |
399 short initvalIndex = fields.getShortAt(index + InstanceKlass.INITVAL_INDEX_OFFSET); | |
400 if (initvalIndex != 0) | |
401 fieldAttributeCount++; | |
402 | |
403 short genSigIndex = fields.getShortAt(index + InstanceKlass.GENERIC_SIGNATURE_INDEX_OFFSET); | |
404 if (genSigIndex != 0) | |
405 fieldAttributeCount++; | |
406 | |
407 dos.writeShort(fieldAttributeCount); | |
408 | |
409 // write synthetic, if applicable | |
410 if (isSyn) | |
411 writeSynthetic(); | |
412 | |
413 if (initvalIndex != 0) { | |
414 dos.writeShort(_constantValueIndex); | |
415 dos.writeInt(2); | |
416 dos.writeShort(initvalIndex); | |
417 if (DEBUG) debugMessage("\tfield init value = " + initvalIndex); | |
418 } | |
419 | |
420 if (genSigIndex != 0) { | |
421 dos.writeShort(_signatureIndex); | |
422 dos.writeInt(2); | |
423 dos.writeShort(genSigIndex); | |
424 if (DEBUG) debugMessage("\tfield generic signature index " + genSigIndex); | |
425 } | |
426 } | |
427 } | |
428 | |
429 protected boolean isSynthetic(short accessFlags) { | |
430 return (accessFlags & (short) JVM_ACC_SYNTHETIC) != 0; | |
431 } | |
432 | |
433 protected void writeSynthetic() throws IOException { | |
434 dos.writeShort(_syntheticIndex); | |
435 dos.writeInt(0); | |
436 } | |
437 | |
438 protected void writeMethods() throws IOException { | |
439 ObjArray methods = klass.getMethods(); | |
440 final int len = (int) methods.getLength(); | |
441 // write number of methods | |
442 dos.writeShort((short) len); | |
443 if (DEBUG) debugMessage("number of methods = " + len); | |
444 for (int m = 0; m < len; m++) { | |
445 writeMethod((Method) methods.getObjAt(m)); | |
446 } | |
447 } | |
448 | |
449 protected void writeMethod(Method m) throws IOException { | |
450 long accessFlags = m.getAccessFlags(); | |
451 dos.writeShort((short) (accessFlags & JVM_RECOGNIZED_METHOD_MODIFIERS)); | |
452 dos.writeShort((short) m.getNameIndex()); | |
453 dos.writeShort((short) m.getSignatureIndex()); | |
454 if (DEBUG) debugMessage("\tmethod name = " + m.getNameIndex() + ", signature = " | |
455 + m.getSignatureIndex()); | |
456 | |
457 final boolean isNative = ((accessFlags & JVM_ACC_NATIVE) != 0); | |
458 final boolean isAbstract = ((accessFlags & JVM_ACC_ABSTRACT) != 0); | |
459 | |
460 short methodAttributeCount = 0; | |
461 | |
462 final boolean isSyn = isSynthetic((short)accessFlags); | |
463 if (isSyn) | |
464 methodAttributeCount++; | |
465 | |
466 final boolean hasCheckedExceptions = m.hasCheckedExceptions(); | |
467 if (hasCheckedExceptions) | |
468 methodAttributeCount++; | |
469 | |
470 final boolean isCodeAvailable = (!isNative) && (!isAbstract); | |
471 if (isCodeAvailable) | |
472 methodAttributeCount++; | |
473 | |
474 final boolean isGeneric = (m.getGenericSignature() != null); | |
475 if (isGeneric) | |
476 methodAttributeCount++; | |
477 | |
478 dos.writeShort(methodAttributeCount); | |
479 if (DEBUG) debugMessage("\tmethod attribute count = " + methodAttributeCount); | |
480 | |
481 if (isSyn) { | |
482 if (DEBUG) debugMessage("\tmethod is synthetic"); | |
483 writeSynthetic(); | |
484 } | |
485 | |
486 if (hasCheckedExceptions) { | |
487 CheckedExceptionElement[] exceptions = m.getCheckedExceptions(); | |
488 dos.writeShort(_exceptionsIndex); | |
489 | |
490 int attrSize = 2 /* number_of_exceptions */ + | |
491 exceptions.length * 2 /* exception_index */; | |
492 dos.writeInt(attrSize); | |
493 dos.writeShort(exceptions.length); | |
494 if (DEBUG) debugMessage("\tmethod has " + exceptions.length | |
495 + " checked exception(s)"); | |
496 for (int e = 0; e < exceptions.length; e++) { | |
497 short cpIndex = (short) exceptions[e].getClassCPIndex(); | |
498 dos.writeShort(cpIndex); | |
499 } | |
500 } | |
501 | |
502 if (isCodeAvailable) { | |
503 byte[] code = m.getByteCode(); | |
504 short codeAttrCount = 0; | |
505 int codeSize = 2 /* max_stack */ + | |
506 2 /* max_locals */ + | |
507 4 /* code_length */ + | |
508 code.length /* code */ + | |
509 2 /* exp. table len. */ + | |
510 2 /* code attr. count */; | |
511 | |
512 TypeArray exceptionTable = m.getExceptionTable(); | |
513 final int exceptionTableLen = (int) exceptionTable.getLength(); | |
514 if (exceptionTableLen != 0) { | |
515 if (DEBUG) debugMessage("\tmethod has exception table"); | |
516 codeSize += (exceptionTableLen / 4) /* exception table is 4-tuple array */ | |
517 * (2 /* start_pc */ + | |
518 2 /* end_pc */ + | |
519 2 /* handler_pc */ + | |
520 2 /* catch_type */); | |
521 } | |
522 | |
523 boolean hasLineNumberTable = m.hasLineNumberTable(); | |
524 LineNumberTableElement[] lineNumberTable = null; | |
525 int lineNumberAttrLen = 0; | |
526 | |
527 if (hasLineNumberTable) { | |
528 if (DEBUG) debugMessage("\tmethod has line number table"); | |
529 lineNumberTable = m.getLineNumberTable(); | |
530 if (DEBUG) debugMessage("\t\tline table length = " + lineNumberTable.length); | |
531 | |
532 lineNumberAttrLen = 2 /* line number table length */ + | |
533 lineNumberTable.length * (2 /* start_pc */ + 2 /* line_number */); | |
534 | |
535 codeSize += 2 /* line number table attr index */ + | |
536 4 /* line number table attr length */ + | |
537 lineNumberAttrLen; | |
538 | |
539 if (DEBUG) debugMessage("\t\tline number table attr size = " + | |
540 lineNumberAttrLen); | |
541 | |
542 codeAttrCount++; | |
543 } | |
544 | |
545 boolean hasLocalVariableTable = m.hasLocalVariableTable(); | |
546 LocalVariableTableElement[] localVariableTable = null; | |
547 int localVarAttrLen = 0; | |
548 | |
549 if (hasLocalVariableTable) { | |
550 if (DEBUG) debugMessage("\tmethod has local variable table"); | |
551 localVariableTable = m.getLocalVariableTable(); | |
552 if (DEBUG) debugMessage("\t\tlocal variable table length = " | |
553 + localVariableTable.length); | |
554 localVarAttrLen = | |
555 2 /* local variable table length */ + | |
556 localVariableTable.length * ( 2 /* start_pc */ + | |
557 2 /* length */ + | |
558 2 /* name_index */ + | |
559 2 /* signature_index */ + | |
560 2 /* variable index */ ); | |
561 | |
562 if (DEBUG) debugMessage("\t\tlocal variable attr size = " + | |
563 localVarAttrLen); | |
564 | |
565 codeSize += 2 /* local variable table attr index */ + | |
566 4 /* local variable table attr length */ + | |
567 localVarAttrLen; | |
568 | |
569 codeAttrCount++; | |
570 } | |
571 | |
572 // fix ConstantPoolCache indices to ConstantPool indices. | |
573 rewriteByteCode(m, code); | |
574 | |
575 // start writing Code | |
576 | |
577 dos.writeShort(_codeIndex); | |
578 | |
579 dos.writeInt(codeSize); | |
580 if (DEBUG) debugMessage("\tcode attribute length = " + codeSize); | |
581 | |
582 dos.writeShort((short) m.getMaxStack()); | |
583 if (DEBUG) debugMessage("\tmax stack = " + m.getMaxStack()); | |
584 | |
585 dos.writeShort((short) m.getMaxLocals()); | |
586 if (DEBUG) debugMessage("\tmax locals = " + m.getMaxLocals()); | |
587 | |
588 dos.writeInt(code.length); | |
589 if (DEBUG) debugMessage("\tcode size = " + code.length); | |
590 | |
591 dos.write(code); | |
592 | |
593 // write exception table size | |
594 dos.writeShort((short) (exceptionTableLen / 4)); | |
595 if (DEBUG) debugMessage("\texception table length = " + (exceptionTableLen / 4)); | |
596 | |
597 if (exceptionTableLen != 0) { | |
598 for (int e = 0; e < exceptionTableLen; e += 4) { | |
599 dos.writeShort((short) exceptionTable.getIntAt(e)); | |
600 dos.writeShort((short) exceptionTable.getIntAt(e + 1)); | |
601 dos.writeShort((short) exceptionTable.getIntAt(e + 2)); | |
602 dos.writeShort((short) exceptionTable.getIntAt(e + 3)); | |
603 } | |
604 } | |
605 | |
606 dos.writeShort((short)codeAttrCount); | |
607 if (DEBUG) debugMessage("\tcode attribute count = " + codeAttrCount); | |
608 | |
609 // write LineNumberTable, if available. | |
610 if (hasLineNumberTable) { | |
611 dos.writeShort(_lineNumberTableIndex); | |
612 dos.writeInt(lineNumberAttrLen); | |
613 dos.writeShort((short) lineNumberTable.length); | |
614 for (int l = 0; l < lineNumberTable.length; l++) { | |
615 dos.writeShort((short) lineNumberTable[l].getStartBCI()); | |
616 dos.writeShort((short) lineNumberTable[l].getLineNumber()); | |
617 } | |
618 } | |
619 | |
620 // write LocalVariableTable, if available. | |
621 if (hasLocalVariableTable) { | |
622 dos.writeShort((short) _localVariableTableIndex); | |
623 dos.writeInt(localVarAttrLen); | |
624 dos.writeShort((short) localVariableTable.length); | |
625 for (int l = 0; l < localVariableTable.length; l++) { | |
626 dos.writeShort((short) localVariableTable[l].getStartBCI()); | |
627 dos.writeShort((short) localVariableTable[l].getLength()); | |
628 dos.writeShort((short) localVariableTable[l].getNameCPIndex()); | |
629 dos.writeShort((short) localVariableTable[l].getDescriptorCPIndex()); | |
630 dos.writeShort((short) localVariableTable[l].getSlot()); | |
631 } | |
632 } | |
633 } | |
634 | |
635 if (isGeneric) { | |
636 writeGenericSignature(m.getGenericSignature().asString()); | |
637 } | |
638 } | |
639 | |
640 protected void rewriteByteCode(Method m, byte[] code) { | |
641 ByteCodeRewriter r = new ByteCodeRewriter(m, cpool, code); | |
642 r.rewrite(); | |
643 } | |
644 | |
645 protected void writeGenericSignature(String signature) throws IOException { | |
646 dos.writeShort(_signatureIndex); | |
647 if (DEBUG) debugMessage("signature attribute = " + _signatureIndex); | |
648 dos.writeInt(2); | |
649 Short index = (Short) utf8ToIndex.get(signature); | |
650 dos.writeShort(index.shortValue()); | |
651 if (DEBUG) debugMessage("generic signature = " + index); | |
652 } | |
653 | |
654 protected void writeClassAttributes() throws IOException { | |
655 final long flags = klass.getAccessFlags(); | |
656 final boolean isSyn = isSynthetic((short) flags); | |
657 | |
658 // check for source file | |
659 short classAttributeCount = 0; | |
660 | |
661 if (isSyn) | |
662 classAttributeCount++; | |
663 | |
664 Symbol sourceFileName = klass.getSourceFileName(); | |
665 if (sourceFileName != null) | |
666 classAttributeCount++; | |
667 | |
668 Symbol genericSignature = klass.getGenericSignature(); | |
669 if (genericSignature != null) | |
670 classAttributeCount++; | |
671 | |
672 TypeArray innerClasses = klass.getInnerClasses(); | |
673 final int numInnerClasses = (int) (innerClasses.getLength() / 4); | |
674 if (numInnerClasses != 0) | |
675 classAttributeCount++; | |
676 | |
677 dos.writeShort(classAttributeCount); | |
678 if (DEBUG) debugMessage("class attribute count = " + classAttributeCount); | |
679 | |
680 if (isSyn) | |
681 writeSynthetic(); | |
682 | |
683 // write SourceFile, if any | |
684 if (sourceFileName != null) { | |
685 dos.writeShort(_sourceFileIndex); | |
686 if (DEBUG) debugMessage("source file attribute = " + _sourceFileIndex); | |
687 dos.writeInt(2); | |
688 Short index = (Short) utf8ToIndex.get(sourceFileName.asString()); | |
689 dos.writeShort(index.shortValue()); | |
690 if (DEBUG) debugMessage("source file name = " + index); | |
691 } | |
692 | |
693 // write Signature, if any | |
694 if (genericSignature != null) { | |
695 writeGenericSignature(genericSignature.asString()); | |
696 } | |
697 | |
698 // write inner classes, if any | |
699 if (numInnerClasses != 0) { | |
700 dos.writeShort(_innerClassesIndex); | |
701 final int innerAttrLen = 2 /* number_of_inner_classes */ + | |
702 numInnerClasses * ( | |
703 2 /* inner_class_info_index */ + | |
704 2 /* outer_class_info_index */ + | |
705 2 /* inner_class_name_index */ + | |
706 2 /* inner_class_access_flags */); | |
707 dos.writeInt(innerAttrLen); | |
708 | |
709 dos.writeShort(numInnerClasses); | |
710 if (DEBUG) debugMessage("class has " + numInnerClasses + " inner class entries"); | |
711 | |
712 for (int index = 0; index < numInnerClasses * 4; index++) { | |
713 dos.writeShort(innerClasses.getShortAt(index)); | |
714 } | |
715 } | |
716 } | |
717 } |