Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/tools/jcore/ClassWriter.java @ 1660:083fde3b838e
6964498: JSR 292 invokedynamic sites need local bootstrap methods
Summary: Add JVM_CONSTANT_InvokeDynamic records to constant pool to determine per-instruction BSMs.
Reviewed-by: twisti
author | jrose |
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date | Thu, 15 Jul 2010 18:40:45 -0700 |
parents | 136b78722a08 |
children | 3b2dea75431e |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2010, 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. | |
232 Klass refKls = (Klass) cpool.getObjAt(ci); | |
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); | |
258 String str = OopUtilities.stringOopToString(cpool.getObjAt(ci)); | |
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 short bootstrapMethodIndex = (short) extractLowShortFromInt(value); |
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307 short nameAndTypeIndex = (short) extractHighShortFromInt(value); |
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308 dos.writeShort(bootstrapMethodIndex); |
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309 dos.writeShort(nameAndTypeIndex); |
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310 if (DEBUG) debugMessage("CP[" + ci + "] = indy BSM = " + |
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311 bootstrapMethodIndex + ", N&T = " + nameAndTypeIndex); |
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 refIndex = (short) value; |
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328 dos.writeShort(refIndex); |
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329 if (DEBUG) debugMessage("CP[" + ci + "] = MT index = " + refIndex); |
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330 break; |
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331 } |
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332 |
1385 | 333 default: |
334 throw new InternalError("Unknown tag: " + cpConstType); | |
0 | 335 } // switch |
336 } | |
337 } | |
338 | |
339 protected void writeClassAccessFlags() throws IOException { | |
340 int flags = (int)(klass.getAccessFlags() & JVM_RECOGNIZED_CLASS_MODIFIERS); | |
341 dos.writeShort((short)flags); | |
342 } | |
343 | |
344 protected void writeThisClass() throws IOException { | |
345 String klassName = klass.getName().asString(); | |
346 Short index = (Short) classToIndex.get(klassName); | |
347 dos.writeShort(index.shortValue()); | |
348 if (DEBUG) debugMessage("this class = " + index); | |
349 } | |
350 | |
351 protected void writeSuperClass() throws IOException { | |
352 Klass superKlass = klass.getSuper(); | |
353 if (superKlass != null) { // is not java.lang.Object | |
354 String superName = superKlass.getName().asString(); | |
355 Short index = (Short) classToIndex.get(superName); | |
356 if (DEBUG) debugMessage("super class = " + index); | |
357 dos.writeShort(index.shortValue()); | |
358 } else { | |
359 dos.writeShort(0); // no super class | |
360 } | |
361 } | |
362 protected void writeInterfaces() throws IOException { | |
363 ObjArray interfaces = klass.getLocalInterfaces(); | |
364 final int len = (int) interfaces.getLength(); | |
365 | |
366 if (DEBUG) debugMessage("number of interfaces = " + len); | |
367 | |
368 // write interfaces count | |
369 dos.writeShort((short) len); | |
370 for (int i = 0; i < len; i++) { | |
371 Klass k = (Klass) interfaces.getObjAt(i); | |
372 Short index = (Short) classToIndex.get(k.getName().asString()); | |
373 dos.writeShort(index.shortValue()); | |
374 if (DEBUG) debugMessage("\t" + index); | |
375 } | |
376 } | |
377 | |
378 protected void writeFields() throws IOException { | |
379 TypeArray fields = klass.getFields(); | |
380 final int length = (int) fields.getLength(); | |
381 | |
382 // write number of fields | |
383 dos.writeShort((short) (length / InstanceKlass.NEXT_OFFSET) ); | |
384 | |
385 if (DEBUG) debugMessage("number of fields = " | |
386 + length/InstanceKlass.NEXT_OFFSET); | |
387 | |
388 for (int index = 0; index < length; index += InstanceKlass.NEXT_OFFSET) { | |
389 short accessFlags = fields.getShortAt(index + InstanceKlass.ACCESS_FLAGS_OFFSET); | |
390 dos.writeShort(accessFlags & (short) JVM_RECOGNIZED_FIELD_MODIFIERS); | |
391 | |
392 short nameIndex = fields.getShortAt(index + InstanceKlass.NAME_INDEX_OFFSET); | |
393 dos.writeShort(nameIndex); | |
394 | |
395 short signatureIndex = fields.getShortAt(index + InstanceKlass.SIGNATURE_INDEX_OFFSET); | |
396 dos.writeShort(signatureIndex); | |
397 if (DEBUG) debugMessage("\tfield name = " + nameIndex + ", signature = " + signatureIndex); | |
398 | |
399 short fieldAttributeCount = 0; | |
705 | 400 boolean hasSyn = hasSyntheticAttribute(accessFlags); |
401 if (hasSyn) | |
0 | 402 fieldAttributeCount++; |
403 | |
404 short initvalIndex = fields.getShortAt(index + InstanceKlass.INITVAL_INDEX_OFFSET); | |
405 if (initvalIndex != 0) | |
406 fieldAttributeCount++; | |
407 | |
408 short genSigIndex = fields.getShortAt(index + InstanceKlass.GENERIC_SIGNATURE_INDEX_OFFSET); | |
409 if (genSigIndex != 0) | |
410 fieldAttributeCount++; | |
411 | |
412 dos.writeShort(fieldAttributeCount); | |
413 | |
414 // write synthetic, if applicable | |
705 | 415 if (hasSyn) |
0 | 416 writeSynthetic(); |
417 | |
418 if (initvalIndex != 0) { | |
705 | 419 writeIndex(_constantValueIndex); |
0 | 420 dos.writeInt(2); |
421 dos.writeShort(initvalIndex); | |
422 if (DEBUG) debugMessage("\tfield init value = " + initvalIndex); | |
423 } | |
424 | |
425 if (genSigIndex != 0) { | |
705 | 426 writeIndex(_signatureIndex); |
0 | 427 dos.writeInt(2); |
428 dos.writeShort(genSigIndex); | |
429 if (DEBUG) debugMessage("\tfield generic signature index " + genSigIndex); | |
430 } | |
431 } | |
432 } | |
433 | |
434 protected boolean isSynthetic(short accessFlags) { | |
435 return (accessFlags & (short) JVM_ACC_SYNTHETIC) != 0; | |
436 } | |
437 | |
705 | 438 protected boolean hasSyntheticAttribute(short accessFlags) { |
439 // Check if flags have the attribute and if the constant pool contains an entry for it. | |
440 return isSynthetic(accessFlags) && _syntheticIndex != 0; | |
441 } | |
442 | |
0 | 443 protected void writeSynthetic() throws IOException { |
705 | 444 writeIndex(_syntheticIndex); |
0 | 445 dos.writeInt(0); |
446 } | |
447 | |
448 protected void writeMethods() throws IOException { | |
449 ObjArray methods = klass.getMethods(); | |
450 final int len = (int) methods.getLength(); | |
451 // write number of methods | |
452 dos.writeShort((short) len); | |
453 if (DEBUG) debugMessage("number of methods = " + len); | |
454 for (int m = 0; m < len; m++) { | |
455 writeMethod((Method) methods.getObjAt(m)); | |
456 } | |
457 } | |
458 | |
459 protected void writeMethod(Method m) throws IOException { | |
460 long accessFlags = m.getAccessFlags(); | |
461 dos.writeShort((short) (accessFlags & JVM_RECOGNIZED_METHOD_MODIFIERS)); | |
462 dos.writeShort((short) m.getNameIndex()); | |
463 dos.writeShort((short) m.getSignatureIndex()); | |
464 if (DEBUG) debugMessage("\tmethod name = " + m.getNameIndex() + ", signature = " | |
465 + m.getSignatureIndex()); | |
466 | |
467 final boolean isNative = ((accessFlags & JVM_ACC_NATIVE) != 0); | |
468 final boolean isAbstract = ((accessFlags & JVM_ACC_ABSTRACT) != 0); | |
469 | |
470 short methodAttributeCount = 0; | |
471 | |
705 | 472 final boolean hasSyn = hasSyntheticAttribute((short)accessFlags); |
473 if (hasSyn) | |
0 | 474 methodAttributeCount++; |
475 | |
476 final boolean hasCheckedExceptions = m.hasCheckedExceptions(); | |
477 if (hasCheckedExceptions) | |
478 methodAttributeCount++; | |
479 | |
480 final boolean isCodeAvailable = (!isNative) && (!isAbstract); | |
481 if (isCodeAvailable) | |
482 methodAttributeCount++; | |
483 | |
484 final boolean isGeneric = (m.getGenericSignature() != null); | |
485 if (isGeneric) | |
486 methodAttributeCount++; | |
487 | |
488 dos.writeShort(methodAttributeCount); | |
489 if (DEBUG) debugMessage("\tmethod attribute count = " + methodAttributeCount); | |
490 | |
705 | 491 if (hasSyn) { |
0 | 492 if (DEBUG) debugMessage("\tmethod is synthetic"); |
493 writeSynthetic(); | |
494 } | |
495 | |
496 if (isCodeAvailable) { | |
497 byte[] code = m.getByteCode(); | |
498 short codeAttrCount = 0; | |
499 int codeSize = 2 /* max_stack */ + | |
500 2 /* max_locals */ + | |
501 4 /* code_length */ + | |
502 code.length /* code */ + | |
503 2 /* exp. table len. */ + | |
504 2 /* code attr. count */; | |
505 | |
506 TypeArray exceptionTable = m.getExceptionTable(); | |
507 final int exceptionTableLen = (int) exceptionTable.getLength(); | |
508 if (exceptionTableLen != 0) { | |
509 if (DEBUG) debugMessage("\tmethod has exception table"); | |
510 codeSize += (exceptionTableLen / 4) /* exception table is 4-tuple array */ | |
511 * (2 /* start_pc */ + | |
512 2 /* end_pc */ + | |
513 2 /* handler_pc */ + | |
514 2 /* catch_type */); | |
515 } | |
516 | |
517 boolean hasLineNumberTable = m.hasLineNumberTable(); | |
518 LineNumberTableElement[] lineNumberTable = null; | |
519 int lineNumberAttrLen = 0; | |
520 | |
521 if (hasLineNumberTable) { | |
522 if (DEBUG) debugMessage("\tmethod has line number table"); | |
523 lineNumberTable = m.getLineNumberTable(); | |
524 if (DEBUG) debugMessage("\t\tline table length = " + lineNumberTable.length); | |
525 | |
526 lineNumberAttrLen = 2 /* line number table length */ + | |
527 lineNumberTable.length * (2 /* start_pc */ + 2 /* line_number */); | |
528 | |
529 codeSize += 2 /* line number table attr index */ + | |
530 4 /* line number table attr length */ + | |
531 lineNumberAttrLen; | |
532 | |
533 if (DEBUG) debugMessage("\t\tline number table attr size = " + | |
534 lineNumberAttrLen); | |
535 | |
536 codeAttrCount++; | |
537 } | |
538 | |
539 boolean hasLocalVariableTable = m.hasLocalVariableTable(); | |
540 LocalVariableTableElement[] localVariableTable = null; | |
541 int localVarAttrLen = 0; | |
542 | |
543 if (hasLocalVariableTable) { | |
544 if (DEBUG) debugMessage("\tmethod has local variable table"); | |
545 localVariableTable = m.getLocalVariableTable(); | |
546 if (DEBUG) debugMessage("\t\tlocal variable table length = " | |
547 + localVariableTable.length); | |
548 localVarAttrLen = | |
549 2 /* local variable table length */ + | |
550 localVariableTable.length * ( 2 /* start_pc */ + | |
551 2 /* length */ + | |
552 2 /* name_index */ + | |
553 2 /* signature_index */ + | |
554 2 /* variable index */ ); | |
555 | |
556 if (DEBUG) debugMessage("\t\tlocal variable attr size = " + | |
557 localVarAttrLen); | |
558 | |
559 codeSize += 2 /* local variable table attr index */ + | |
560 4 /* local variable table attr length */ + | |
561 localVarAttrLen; | |
562 | |
563 codeAttrCount++; | |
564 } | |
565 | |
566 // fix ConstantPoolCache indices to ConstantPool indices. | |
567 rewriteByteCode(m, code); | |
568 | |
569 // start writing Code | |
570 | |
705 | 571 writeIndex(_codeIndex); |
0 | 572 |
573 dos.writeInt(codeSize); | |
574 if (DEBUG) debugMessage("\tcode attribute length = " + codeSize); | |
575 | |
576 dos.writeShort((short) m.getMaxStack()); | |
577 if (DEBUG) debugMessage("\tmax stack = " + m.getMaxStack()); | |
578 | |
579 dos.writeShort((short) m.getMaxLocals()); | |
580 if (DEBUG) debugMessage("\tmax locals = " + m.getMaxLocals()); | |
581 | |
582 dos.writeInt(code.length); | |
583 if (DEBUG) debugMessage("\tcode size = " + code.length); | |
584 | |
585 dos.write(code); | |
586 | |
587 // write exception table size | |
588 dos.writeShort((short) (exceptionTableLen / 4)); | |
589 if (DEBUG) debugMessage("\texception table length = " + (exceptionTableLen / 4)); | |
590 | |
591 if (exceptionTableLen != 0) { | |
592 for (int e = 0; e < exceptionTableLen; e += 4) { | |
593 dos.writeShort((short) exceptionTable.getIntAt(e)); | |
594 dos.writeShort((short) exceptionTable.getIntAt(e + 1)); | |
595 dos.writeShort((short) exceptionTable.getIntAt(e + 2)); | |
596 dos.writeShort((short) exceptionTable.getIntAt(e + 3)); | |
597 } | |
598 } | |
599 | |
600 dos.writeShort((short)codeAttrCount); | |
601 if (DEBUG) debugMessage("\tcode attribute count = " + codeAttrCount); | |
602 | |
603 // write LineNumberTable, if available. | |
604 if (hasLineNumberTable) { | |
705 | 605 writeIndex(_lineNumberTableIndex); |
0 | 606 dos.writeInt(lineNumberAttrLen); |
607 dos.writeShort((short) lineNumberTable.length); | |
608 for (int l = 0; l < lineNumberTable.length; l++) { | |
609 dos.writeShort((short) lineNumberTable[l].getStartBCI()); | |
610 dos.writeShort((short) lineNumberTable[l].getLineNumber()); | |
611 } | |
612 } | |
613 | |
614 // write LocalVariableTable, if available. | |
615 if (hasLocalVariableTable) { | |
705 | 616 writeIndex((short) _localVariableTableIndex); |
0 | 617 dos.writeInt(localVarAttrLen); |
618 dos.writeShort((short) localVariableTable.length); | |
619 for (int l = 0; l < localVariableTable.length; l++) { | |
620 dos.writeShort((short) localVariableTable[l].getStartBCI()); | |
621 dos.writeShort((short) localVariableTable[l].getLength()); | |
622 dos.writeShort((short) localVariableTable[l].getNameCPIndex()); | |
623 dos.writeShort((short) localVariableTable[l].getDescriptorCPIndex()); | |
624 dos.writeShort((short) localVariableTable[l].getSlot()); | |
625 } | |
626 } | |
627 } | |
628 | |
705 | 629 if (hasCheckedExceptions) { |
630 CheckedExceptionElement[] exceptions = m.getCheckedExceptions(); | |
631 writeIndex(_exceptionsIndex); | |
632 | |
633 int attrSize = 2 /* number_of_exceptions */ + | |
634 exceptions.length * 2 /* exception_index */; | |
635 dos.writeInt(attrSize); | |
636 dos.writeShort(exceptions.length); | |
637 if (DEBUG) debugMessage("\tmethod has " + exceptions.length | |
638 + " checked exception(s)"); | |
639 for (int e = 0; e < exceptions.length; e++) { | |
640 short cpIndex = (short) exceptions[e].getClassCPIndex(); | |
641 dos.writeShort(cpIndex); | |
642 } | |
643 } | |
644 | |
0 | 645 if (isGeneric) { |
646 writeGenericSignature(m.getGenericSignature().asString()); | |
647 } | |
648 } | |
649 | |
650 protected void rewriteByteCode(Method m, byte[] code) { | |
651 ByteCodeRewriter r = new ByteCodeRewriter(m, cpool, code); | |
652 r.rewrite(); | |
653 } | |
654 | |
655 protected void writeGenericSignature(String signature) throws IOException { | |
705 | 656 writeIndex(_signatureIndex); |
0 | 657 if (DEBUG) debugMessage("signature attribute = " + _signatureIndex); |
658 dos.writeInt(2); | |
659 Short index = (Short) utf8ToIndex.get(signature); | |
660 dos.writeShort(index.shortValue()); | |
661 if (DEBUG) debugMessage("generic signature = " + index); | |
662 } | |
663 | |
664 protected void writeClassAttributes() throws IOException { | |
665 final long flags = klass.getAccessFlags(); | |
705 | 666 final boolean hasSyn = hasSyntheticAttribute((short) flags); |
0 | 667 |
668 // check for source file | |
669 short classAttributeCount = 0; | |
670 | |
705 | 671 if (hasSyn) |
0 | 672 classAttributeCount++; |
673 | |
674 Symbol sourceFileName = klass.getSourceFileName(); | |
675 if (sourceFileName != null) | |
676 classAttributeCount++; | |
677 | |
678 Symbol genericSignature = klass.getGenericSignature(); | |
679 if (genericSignature != null) | |
680 classAttributeCount++; | |
681 | |
682 TypeArray innerClasses = klass.getInnerClasses(); | |
683 final int numInnerClasses = (int) (innerClasses.getLength() / 4); | |
684 if (numInnerClasses != 0) | |
685 classAttributeCount++; | |
686 | |
687 dos.writeShort(classAttributeCount); | |
688 if (DEBUG) debugMessage("class attribute count = " + classAttributeCount); | |
689 | |
705 | 690 if (hasSyn) |
0 | 691 writeSynthetic(); |
692 | |
693 // write SourceFile, if any | |
694 if (sourceFileName != null) { | |
705 | 695 writeIndex(_sourceFileIndex); |
0 | 696 if (DEBUG) debugMessage("source file attribute = " + _sourceFileIndex); |
697 dos.writeInt(2); | |
698 Short index = (Short) utf8ToIndex.get(sourceFileName.asString()); | |
699 dos.writeShort(index.shortValue()); | |
700 if (DEBUG) debugMessage("source file name = " + index); | |
701 } | |
702 | |
703 // write Signature, if any | |
704 if (genericSignature != null) { | |
705 writeGenericSignature(genericSignature.asString()); | |
706 } | |
707 | |
708 // write inner classes, if any | |
709 if (numInnerClasses != 0) { | |
705 | 710 writeIndex(_innerClassesIndex); |
0 | 711 final int innerAttrLen = 2 /* number_of_inner_classes */ + |
712 numInnerClasses * ( | |
713 2 /* inner_class_info_index */ + | |
714 2 /* outer_class_info_index */ + | |
715 2 /* inner_class_name_index */ + | |
716 2 /* inner_class_access_flags */); | |
717 dos.writeInt(innerAttrLen); | |
718 | |
719 dos.writeShort(numInnerClasses); | |
720 if (DEBUG) debugMessage("class has " + numInnerClasses + " inner class entries"); | |
721 | |
722 for (int index = 0; index < numInnerClasses * 4; index++) { | |
723 dos.writeShort(innerClasses.getShortAt(index)); | |
724 } | |
725 } | |
726 } | |
727 } |