1 /*
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.javac.jvm;
27
28 import java.io.*;
29 import java.util.LinkedHashMap;
30 import java.util.Map;
31 import java.util.Set;
32 import java.util.HashSet;
33
34 import javax.tools.JavaFileManager;
35 import javax.tools.FileObject;
36 import javax.tools.JavaFileObject;
37
38 import com.sun.tools.javac.code.*;
39 import com.sun.tools.javac.code.Attribute.RetentionPolicy;
40 import com.sun.tools.javac.code.Attribute.TypeCompound;
41 import com.sun.tools.javac.code.Symbol.*;
42 import com.sun.tools.javac.code.Type.*;
43 import com.sun.tools.javac.code.Types.UniqueType;
44 import com.sun.tools.javac.file.BaseFileObject;
45 import com.sun.tools.javac.jvm.Pool.DynamicMethod;
46 import com.sun.tools.javac.jvm.Pool.Method;
47 import com.sun.tools.javac.jvm.Pool.MethodHandle;
48 import com.sun.tools.javac.jvm.Pool.Variable;
49 import com.sun.tools.javac.util.*;
50
51 import static com.sun.tools.javac.code.Flags.*;
52 import static com.sun.tools.javac.code.Kinds.*;
53 import static com.sun.tools.javac.code.TypeTag.*;
54 import static com.sun.tools.javac.jvm.UninitializedType.*;
55 import static com.sun.tools.javac.main.Option.*;
56 import static javax.tools.StandardLocation.CLASS_OUTPUT;
57
58
59 /** This class provides operations to map an internal symbol table graph
60 * rooted in a ClassSymbol into a classfile.
61 *
62 * <p><b>This is NOT part of any supported API.
63 * If you write code that depends on this, you do so at your own risk.
64 * This code and its internal interfaces are subject to change or
65 * deletion without notice.</b>
66 */
67 public class ClassWriter extends ClassFile {
68 protected static final Context.Key<ClassWriter> classWriterKey =
69 new Context.Key<ClassWriter>();
70
71 private final Options options;
72
73 /** Switch: verbose output.
74 */
75 private boolean verbose;
76
77 /** Switch: scramble private field names.
78 */
79 private boolean scramble;
80
81 /** Switch: scramble all field names.
82 */
83 private boolean scrambleAll;
84
85 /** Switch: retrofit mode.
86 */
87 private boolean retrofit;
88
89 /** Switch: emit source file attribute.
90 */
91 private boolean emitSourceFile;
92
93 /** Switch: generate CharacterRangeTable attribute.
94 */
95 private boolean genCrt;
96
97 /** Switch: describe the generated stackmap.
98 */
99 boolean debugstackmap;
100
101 /**
102 * Target class version.
103 */
104 private Target target;
105
106 /**
107 * Source language version.
108 */
109 private Source source;
110
111 /** Type utilities. */
112 private Types types;
113
114 /** The initial sizes of the data and constant pool buffers.
115 * Sizes are increased when buffers get full.
116 */
117 static final int DATA_BUF_SIZE = 0x0fff0;
118 static final int POOL_BUF_SIZE = 0x1fff0;
119
120 /** An output buffer for member info.
121 */
122 ByteBuffer databuf = new ByteBuffer(DATA_BUF_SIZE);
123
124 /** An output buffer for the constant pool.
125 */
126 ByteBuffer poolbuf = new ByteBuffer(POOL_BUF_SIZE);
127
128 /** The constant pool.
129 */
130 Pool pool;
131
132 /** The inner classes to be written, as a set.
133 */
134 Set<ClassSymbol> innerClasses;
135
136 /** The inner classes to be written, as a queue where
137 * enclosing classes come first.
138 */
139 ListBuffer<ClassSymbol> innerClassesQueue;
140
141 /** The bootstrap methods to be written in the corresponding class attribute
142 * (one for each invokedynamic)
143 */
144 Map<DynamicMethod, MethodHandle> bootstrapMethods;
145
146 /** The log to use for verbose output.
147 */
148 private final Log log;
149
150 /** The name table. */
151 private final Names names;
152
153 /** Access to files. */
154 private final JavaFileManager fileManager;
155
156 /** Sole signature generator */
157 private final CWSignatureGenerator signatureGen;
158
159 /** The tags and constants used in compressed stackmap. */
160 static final int SAME_FRAME_SIZE = 64;
161 static final int SAME_LOCALS_1_STACK_ITEM_EXTENDED = 247;
162 static final int SAME_FRAME_EXTENDED = 251;
163 static final int FULL_FRAME = 255;
164 static final int MAX_LOCAL_LENGTH_DIFF = 4;
165
166 /** Get the ClassWriter instance for this context. */
167 public static ClassWriter instance(Context context) {
168 ClassWriter instance = context.get(classWriterKey);
169 if (instance == null)
170 instance = new ClassWriter(context);
171 return instance;
172 }
173
174 /** Construct a class writer, given an options table.
175 */
176 protected ClassWriter(Context context) {
177 context.put(classWriterKey, this);
178
179 log = Log.instance(context);
180 names = Names.instance(context);
181 options = Options.instance(context);
182 target = Target.instance(context);
183 source = Source.instance(context);
184 types = Types.instance(context);
185 fileManager = context.get(JavaFileManager.class);
186 signatureGen = new CWSignatureGenerator(types);
187
188 verbose = options.isSet(VERBOSE);
189 scramble = options.isSet("-scramble");
190 scrambleAll = options.isSet("-scrambleAll");
191 retrofit = options.isSet("-retrofit");
192 genCrt = options.isSet(XJCOV);
193 debugstackmap = options.isSet("debugstackmap");
194
195 emitSourceFile = options.isUnset(G_CUSTOM) ||
196 options.isSet(G_CUSTOM, "source");
197
198 String dumpModFlags = options.get("dumpmodifiers");
199 dumpClassModifiers =
200 (dumpModFlags != null && dumpModFlags.indexOf('c') != -1);
201 dumpFieldModifiers =
202 (dumpModFlags != null && dumpModFlags.indexOf('f') != -1);
203 dumpInnerClassModifiers =
204 (dumpModFlags != null && dumpModFlags.indexOf('i') != -1);
205 dumpMethodModifiers =
206 (dumpModFlags != null && dumpModFlags.indexOf('m') != -1);
207 }
208
209 /******************************************************************
210 * Diagnostics: dump generated class names and modifiers
211 ******************************************************************/
212
213 /** Value of option 'dumpmodifiers' is a string
214 * indicating which modifiers should be dumped for debugging:
215 * 'c' -- classes
216 * 'f' -- fields
217 * 'i' -- innerclass attributes
218 * 'm' -- methods
219 * For example, to dump everything:
220 * javac -XDdumpmodifiers=cifm MyProg.java
221 */
222 private final boolean dumpClassModifiers; // -XDdumpmodifiers=c
223 private final boolean dumpFieldModifiers; // -XDdumpmodifiers=f
224 private final boolean dumpInnerClassModifiers; // -XDdumpmodifiers=i
225 private final boolean dumpMethodModifiers; // -XDdumpmodifiers=m
226
227
228 /** Return flags as a string, separated by " ".
229 */
230 public static String flagNames(long flags) {
231 StringBuilder sbuf = new StringBuilder();
232 int i = 0;
233 long f = flags & StandardFlags;
234 while (f != 0) {
235 if ((f & 1) != 0) {
236 sbuf.append(" ");
237 sbuf.append(flagName[i]);
238 }
239 f = f >> 1;
240 i++;
241 }
242 return sbuf.toString();
243 }
244 //where
245 private final static String[] flagName = {
246 "PUBLIC", "PRIVATE", "PROTECTED", "STATIC", "FINAL",
247 "SUPER", "VOLATILE", "TRANSIENT", "NATIVE", "INTERFACE",
248 "ABSTRACT", "STRICTFP"};
249
250 /******************************************************************
251 * Output routines
252 ******************************************************************/
253
254 /** Write a character into given byte buffer;
255 * byte buffer will not be grown.
256 */
257 void putChar(ByteBuffer buf, int op, int x) {
258 buf.elems[op ] = (byte)((x >> 8) & 0xFF);
259 buf.elems[op+1] = (byte)((x ) & 0xFF);
260 }
261
262 /** Write an integer into given byte buffer;
263 * byte buffer will not be grown.
264 */
265 void putInt(ByteBuffer buf, int adr, int x) {
266 buf.elems[adr ] = (byte)((x >> 24) & 0xFF);
267 buf.elems[adr+1] = (byte)((x >> 16) & 0xFF);
268 buf.elems[adr+2] = (byte)((x >> 8) & 0xFF);
269 buf.elems[adr+3] = (byte)((x ) & 0xFF);
270 }
271
272 /**
273 * Signature Generation
274 */
275 private class CWSignatureGenerator extends Types.SignatureGenerator {
276
277 /**
278 * An output buffer for type signatures.
279 */
280 ByteBuffer sigbuf = new ByteBuffer();
281
282 CWSignatureGenerator(Types types) {
283 super(types);
284 }
285
286 /**
287 * Assemble signature of given type in string buffer.
288 * Check for uninitialized types before calling the general case.
289 */
290 @Override
291 public void assembleSig(Type type) {
292 type = type.unannotatedType();
293 switch (type.getTag()) {
294 case UNINITIALIZED_THIS:
295 case UNINITIALIZED_OBJECT:
296 // we don't yet have a spec for uninitialized types in the
297 // local variable table
298 assembleSig(types.erasure(((UninitializedType)type).qtype));
299 break;
300 default:
301 super.assembleSig(type);
302 }
303 }
304
305 @Override
306 protected void append(char ch) {
307 sigbuf.appendByte(ch);
308 }
309
310 @Override
311 protected void append(byte[] ba) {
312 sigbuf.appendBytes(ba);
313 }
314
315 @Override
316 protected void append(Name name) {
317 sigbuf.appendName(name);
318 }
319
320 @Override
321 protected void classReference(ClassSymbol c) {
322 enterInner(c);
323 }
324
325 private void reset() {
326 sigbuf.reset();
327 }
328
329 private Name toName() {
330 return sigbuf.toName(names);
331 }
332
333 private boolean isEmpty() {
334 return sigbuf.length == 0;
335 }
336 }
337
338 /**
339 * Return signature of given type
340 */
341 Name typeSig(Type type) {
342 Assert.check(signatureGen.isEmpty());
343 //- System.out.println(" ? " + type);
344 signatureGen.assembleSig(type);
345 Name n = signatureGen.toName();
346 signatureGen.reset();
347 //- System.out.println(" " + n);
348 return n;
349 }
350
351 /** Given a type t, return the extended class name of its erasure in
352 * external representation.
353 */
354 public Name xClassName(Type t) {
355 if (t.hasTag(CLASS)) {
356 return names.fromUtf(externalize(t.tsym.flatName()));
357 } else if (t.hasTag(ARRAY)) {
358 return typeSig(types.erasure(t));
359 } else {
360 throw new AssertionError("xClassName");
361 }
362 }
363
364 /******************************************************************
365 * Writing the Constant Pool
366 ******************************************************************/
367
368 /** Thrown when the constant pool is over full.
369 */
370 public static class PoolOverflow extends Exception {
371 private static final long serialVersionUID = 0;
372 public PoolOverflow() {}
373 }
374 public static class StringOverflow extends Exception {
375 private static final long serialVersionUID = 0;
376 public final String value;
377 public StringOverflow(String s) {
378 value = s;
379 }
380 }
381
382 /** Write constant pool to pool buffer.
383 * Note: during writing, constant pool
384 * might grow since some parts of constants still need to be entered.
385 */
386 void writePool(Pool pool) throws PoolOverflow, StringOverflow {
387 int poolCountIdx = poolbuf.length;
388 poolbuf.appendChar(0);
389 int i = 1;
390 while (i < pool.pp) {
391 Object value = pool.pool[i];
392 Assert.checkNonNull(value);
393 if (value instanceof Method || value instanceof Variable)
394 value = ((DelegatedSymbol)value).getUnderlyingSymbol();
395
396 if (value instanceof MethodSymbol) {
397 MethodSymbol m = (MethodSymbol)value;
398 if (!m.isDynamic()) {
399 poolbuf.appendByte((m.owner.flags() & INTERFACE) != 0
400 ? CONSTANT_InterfaceMethodref
401 : CONSTANT_Methodref);
402 poolbuf.appendChar(pool.put(m.owner));
403 poolbuf.appendChar(pool.put(nameType(m)));
404 } else {
405 //invokedynamic
406 DynamicMethodSymbol dynSym = (DynamicMethodSymbol)m;
407 MethodHandle handle = new MethodHandle(dynSym.bsmKind, dynSym.bsm, types);
408 DynamicMethod dynMeth = new DynamicMethod(dynSym, types);
409 bootstrapMethods.put(dynMeth, handle);
410 //init cp entries
411 pool.put(names.BootstrapMethods);
412 pool.put(handle);
413 for (Object staticArg : dynSym.staticArgs) {
414 pool.put(staticArg);
415 }
416 poolbuf.appendByte(CONSTANT_InvokeDynamic);
417 poolbuf.appendChar(bootstrapMethods.size() - 1);
418 poolbuf.appendChar(pool.put(nameType(dynSym)));
419 }
420 } else if (value instanceof VarSymbol) {
421 VarSymbol v = (VarSymbol)value;
422 poolbuf.appendByte(CONSTANT_Fieldref);
423 poolbuf.appendChar(pool.put(v.owner));
424 poolbuf.appendChar(pool.put(nameType(v)));
425 } else if (value instanceof Name) {
426 poolbuf.appendByte(CONSTANT_Utf8);
427 byte[] bs = ((Name)value).toUtf();
428 poolbuf.appendChar(bs.length);
429 poolbuf.appendBytes(bs, 0, bs.length);
430 if (bs.length > Pool.MAX_STRING_LENGTH)
431 throw new StringOverflow(value.toString());
432 } else if (value instanceof ClassSymbol) {
433 ClassSymbol c = (ClassSymbol)value;
434 if (c.owner.kind == TYP) pool.put(c.owner);
435 poolbuf.appendByte(CONSTANT_Class);
436 if (c.type.hasTag(ARRAY)) {
437 poolbuf.appendChar(pool.put(typeSig(c.type)));
438 } else {
439 poolbuf.appendChar(pool.put(names.fromUtf(externalize(c.flatname))));
440 enterInner(c);
441 }
442 } else if (value instanceof NameAndType) {
443 NameAndType nt = (NameAndType)value;
444 poolbuf.appendByte(CONSTANT_NameandType);
445 poolbuf.appendChar(pool.put(nt.name));
446 poolbuf.appendChar(pool.put(typeSig(nt.uniqueType.type)));
447 } else if (value instanceof Integer) {
448 poolbuf.appendByte(CONSTANT_Integer);
449 poolbuf.appendInt(((Integer)value).intValue());
450 } else if (value instanceof Long) {
451 poolbuf.appendByte(CONSTANT_Long);
452 poolbuf.appendLong(((Long)value).longValue());
453 i++;
454 } else if (value instanceof Float) {
455 poolbuf.appendByte(CONSTANT_Float);
456 poolbuf.appendFloat(((Float)value).floatValue());
457 } else if (value instanceof Double) {
458 poolbuf.appendByte(CONSTANT_Double);
459 poolbuf.appendDouble(((Double)value).doubleValue());
460 i++;
461 } else if (value instanceof String) {
462 poolbuf.appendByte(CONSTANT_String);
463 poolbuf.appendChar(pool.put(names.fromString((String)value)));
464 } else if (value instanceof UniqueType) {
465 Type type = ((UniqueType)value).type;
466 if (type instanceof MethodType) {
467 poolbuf.appendByte(CONSTANT_MethodType);
468 poolbuf.appendChar(pool.put(typeSig((MethodType)type)));
469 } else {
470 if (type.hasTag(CLASS)) enterInner((ClassSymbol)type.tsym);
471 poolbuf.appendByte(CONSTANT_Class);
472 poolbuf.appendChar(pool.put(xClassName(type)));
473 }
474 } else if (value instanceof MethodHandle) {
475 MethodHandle ref = (MethodHandle)value;
476 poolbuf.appendByte(CONSTANT_MethodHandle);
477 poolbuf.appendByte(ref.refKind);
478 poolbuf.appendChar(pool.put(ref.refSym));
479 } else {
480 Assert.error("writePool " + value);
481 }
482 i++;
483 }
484 if (pool.pp > Pool.MAX_ENTRIES)
485 throw new PoolOverflow();
486 putChar(poolbuf, poolCountIdx, pool.pp);
487 }
488
489 /** Given a field, return its name.
490 */
491 Name fieldName(Symbol sym) {
492 if (scramble && (sym.flags() & PRIVATE) != 0 ||
493 scrambleAll && (sym.flags() & (PROTECTED | PUBLIC)) == 0)
494 return names.fromString("_$" + sym.name.getIndex());
495 else
496 return sym.name;
497 }
498
499 /** Given a symbol, return its name-and-type.
500 */
501 NameAndType nameType(Symbol sym) {
502 return new NameAndType(fieldName(sym),
503 retrofit
504 ? sym.erasure(types)
505 : sym.externalType(types), types);
506 // if we retrofit, then the NameAndType has been read in as is
507 // and no change is necessary. If we compile normally, the
508 // NameAndType is generated from a symbol reference, and the
509 // adjustment of adding an additional this$n parameter needs to be made.
510 }
511
512 /******************************************************************
513 * Writing Attributes
514 ******************************************************************/
515
516 /** Write header for an attribute to data buffer and return
517 * position past attribute length index.
518 */
519 int writeAttr(Name attrName) {
520 databuf.appendChar(pool.put(attrName));
521 databuf.appendInt(0);
522 return databuf.length;
523 }
524
525 /** Fill in attribute length.
526 */
527 void endAttr(int index) {
528 putInt(databuf, index - 4, databuf.length - index);
529 }
530
531 /** Leave space for attribute count and return index for
532 * number of attributes field.
533 */
534 int beginAttrs() {
535 databuf.appendChar(0);
536 return databuf.length;
537 }
538
539 /** Fill in number of attributes.
540 */
541 void endAttrs(int index, int count) {
542 putChar(databuf, index - 2, count);
543 }
544
545 /** Write the EnclosingMethod attribute if needed.
546 * Returns the number of attributes written (0 or 1).
547 */
548 int writeEnclosingMethodAttribute(ClassSymbol c) {
549 if (!target.hasEnclosingMethodAttribute())
550 return 0;
551 return writeEnclosingMethodAttribute(names.EnclosingMethod, c);
552 }
553
554 /** Write the EnclosingMethod attribute with a specified name.
555 * Returns the number of attributes written (0 or 1).
556 */
557 protected int writeEnclosingMethodAttribute(Name attributeName, ClassSymbol c) {
558 if (c.owner.kind != MTH && // neither a local class
559 c.name != names.empty) // nor anonymous
560 return 0;
561
562 int alenIdx = writeAttr(attributeName);
563 ClassSymbol enclClass = c.owner.enclClass();
564 MethodSymbol enclMethod =
565 (c.owner.type == null // local to init block
566 || c.owner.kind != MTH) // or member init
567 ? null
568 : (MethodSymbol)c.owner;
569 databuf.appendChar(pool.put(enclClass));
570 databuf.appendChar(enclMethod == null ? 0 : pool.put(nameType(c.owner)));
571 endAttr(alenIdx);
572 return 1;
573 }
574
575 /** Write flag attributes; return number of attributes written.
576 */
577 int writeFlagAttrs(long flags) {
578 int acount = 0;
579 if ((flags & DEPRECATED) != 0) {
580 int alenIdx = writeAttr(names.Deprecated);
581 endAttr(alenIdx);
582 acount++;
583 }
584 if ((flags & ENUM) != 0 && !target.useEnumFlag()) {
585 int alenIdx = writeAttr(names.Enum);
586 endAttr(alenIdx);
587 acount++;
588 }
589 if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag()) {
590 int alenIdx = writeAttr(names.Synthetic);
591 endAttr(alenIdx);
592 acount++;
593 }
594 if ((flags & BRIDGE) != 0 && !target.useBridgeFlag()) {
595 int alenIdx = writeAttr(names.Bridge);
596 endAttr(alenIdx);
597 acount++;
598 }
599 if ((flags & VARARGS) != 0 && !target.useVarargsFlag()) {
600 int alenIdx = writeAttr(names.Varargs);
601 endAttr(alenIdx);
602 acount++;
603 }
604 if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag()) {
605 int alenIdx = writeAttr(names.Annotation);
606 endAttr(alenIdx);
607 acount++;
608 }
609 return acount;
610 }
611
612 /** Write member (field or method) attributes;
613 * return number of attributes written.
614 */
615 int writeMemberAttrs(Symbol sym) {
616 int acount = writeFlagAttrs(sym.flags());
617 long flags = sym.flags();
618 if (source.allowGenerics() &&
619 (flags & (SYNTHETIC|BRIDGE)) != SYNTHETIC &&
620 (flags & ANONCONSTR) == 0 &&
621 (!types.isSameType(sym.type, sym.erasure(types)) ||
622 signatureGen.hasTypeVar(sym.type.getThrownTypes()))) {
623 // note that a local class with captured variables
624 // will get a signature attribute
625 int alenIdx = writeAttr(names.Signature);
626 databuf.appendChar(pool.put(typeSig(sym.type)));
627 endAttr(alenIdx);
628 acount++;
629 }
630 acount += writeJavaAnnotations(sym.getRawAttributes());
631 acount += writeTypeAnnotations(sym.getRawTypeAttributes(), false);
632 return acount;
633 }
634
635 /**
636 * Write method parameter names attribute.
637 */
638 int writeMethodParametersAttr(MethodSymbol m) {
639 MethodType ty = m.externalType(types).asMethodType();
640 final int allparams = ty.argtypes.size();
641 if (m.params != null && allparams != 0) {
642 final int attrIndex = writeAttr(names.MethodParameters);
643 databuf.appendByte(allparams);
644 // Write extra parameters first
645 for (VarSymbol s : m.extraParams) {
646 final int flags =
647 ((int) s.flags() & (FINAL | SYNTHETIC | MANDATED)) |
648 ((int) m.flags() & SYNTHETIC);
649 databuf.appendChar(pool.put(s.name));
650 databuf.appendChar(flags);
651 }
652 // Now write the real parameters
653 for (VarSymbol s : m.params) {
654 final int flags =
655 ((int) s.flags() & (FINAL | SYNTHETIC | MANDATED)) |
656 ((int) m.flags() & SYNTHETIC);
657 databuf.appendChar(pool.put(s.name));
658 databuf.appendChar(flags);
659 }
660 // Now write the captured locals
661 for (VarSymbol s : m.capturedLocals) {
662 final int flags =
663 ((int) s.flags() & (FINAL | SYNTHETIC | MANDATED)) |
664 ((int) m.flags() & SYNTHETIC);
665 databuf.appendChar(pool.put(s.name));
666 databuf.appendChar(flags);
667 }
668 endAttr(attrIndex);
669 return 1;
670 } else
671 return 0;
672 }
673
674
675 /** Write method parameter annotations;
676 * return number of attributes written.
677 */
678 int writeParameterAttrs(MethodSymbol m) {
679 boolean hasVisible = false;
680 boolean hasInvisible = false;
681 if (m.params != null) {
682 for (VarSymbol s : m.params) {
683 for (Attribute.Compound a : s.getRawAttributes()) {
684 switch (types.getRetention(a)) {
685 case SOURCE: break;
686 case CLASS: hasInvisible = true; break;
687 case RUNTIME: hasVisible = true; break;
688 default: ;// /* fail soft */ throw new AssertionError(vis);
689 }
690 }
691 }
692 }
693
694 int attrCount = 0;
695 if (hasVisible) {
696 int attrIndex = writeAttr(names.RuntimeVisibleParameterAnnotations);
697 databuf.appendByte(m.params.length());
698 for (VarSymbol s : m.params) {
699 ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();
700 for (Attribute.Compound a : s.getRawAttributes())
701 if (types.getRetention(a) == RetentionPolicy.RUNTIME)
702 buf.append(a);
703 databuf.appendChar(buf.length());
704 for (Attribute.Compound a : buf)
705 writeCompoundAttribute(a);
706 }
707 endAttr(attrIndex);
708 attrCount++;
709 }
710 if (hasInvisible) {
711 int attrIndex = writeAttr(names.RuntimeInvisibleParameterAnnotations);
712 databuf.appendByte(m.params.length());
713 for (VarSymbol s : m.params) {
714 ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();
715 for (Attribute.Compound a : s.getRawAttributes())
716 if (types.getRetention(a) == RetentionPolicy.CLASS)
717 buf.append(a);
718 databuf.appendChar(buf.length());
719 for (Attribute.Compound a : buf)
720 writeCompoundAttribute(a);
721 }
722 endAttr(attrIndex);
723 attrCount++;
724 }
725 return attrCount;
726 }
727
728 /**********************************************************************
729 * Writing Java-language annotations (aka metadata, attributes)
730 **********************************************************************/
731
732 /** Write Java-language annotations; return number of JVM
733 * attributes written (zero or one).
734 */
735 int writeJavaAnnotations(List<Attribute.Compound> attrs) {
736 if (attrs.isEmpty()) return 0;
737 ListBuffer<Attribute.Compound> visibles = new ListBuffer<Attribute.Compound>();
738 ListBuffer<Attribute.Compound> invisibles = new ListBuffer<Attribute.Compound>();
739 for (Attribute.Compound a : attrs) {
740 switch (types.getRetention(a)) {
741 case SOURCE: break;
742 case CLASS: invisibles.append(a); break;
743 case RUNTIME: visibles.append(a); break;
744 default: ;// /* fail soft */ throw new AssertionError(vis);
745 }
746 }
747
748 int attrCount = 0;
749 if (visibles.length() != 0) {
750 int attrIndex = writeAttr(names.RuntimeVisibleAnnotations);
751 databuf.appendChar(visibles.length());
752 for (Attribute.Compound a : visibles)
753 writeCompoundAttribute(a);
754 endAttr(attrIndex);
755 attrCount++;
756 }
757 if (invisibles.length() != 0) {
758 int attrIndex = writeAttr(names.RuntimeInvisibleAnnotations);
759 databuf.appendChar(invisibles.length());
760 for (Attribute.Compound a : invisibles)
761 writeCompoundAttribute(a);
762 endAttr(attrIndex);
763 attrCount++;
764 }
765 return attrCount;
766 }
767
768 int writeTypeAnnotations(List<Attribute.TypeCompound> typeAnnos, boolean inCode) {
769 if (typeAnnos.isEmpty()) return 0;
770
771 ListBuffer<Attribute.TypeCompound> visibles = ListBuffer.lb();
772 ListBuffer<Attribute.TypeCompound> invisibles = ListBuffer.lb();
773
774 for (Attribute.TypeCompound tc : typeAnnos) {
775 if (tc.hasUnknownPosition()) {
776 boolean fixed = tc.tryFixPosition();
777
778 // Could we fix it?
779 if (!fixed) {
780 // This happens for nested types like @A Outer. @B Inner.
781 // For method parameters we get the annotation twice! Once with
782 // a valid position, once unknown.
783 // TODO: find a cleaner solution.
784 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
785 pw.println("ClassWriter: Position UNKNOWN in type annotation: " + tc);
786 continue;
787 }
788 }
789
790 if (tc.position.type.isLocal() != inCode)
791 continue;
792 if (!tc.position.emitToClassfile())
793 continue;
794 switch (types.getRetention(tc)) {
795 case SOURCE: break;
796 case CLASS: invisibles.append(tc); break;
797 case RUNTIME: visibles.append(tc); break;
798 default: ;// /* fail soft */ throw new AssertionError(vis);
799 }
800 }
801
802 int attrCount = 0;
803 if (visibles.length() != 0) {
804 int attrIndex = writeAttr(names.RuntimeVisibleTypeAnnotations);
805 databuf.appendChar(visibles.length());
806 for (Attribute.TypeCompound p : visibles)
807 writeTypeAnnotation(p);
808 endAttr(attrIndex);
809 attrCount++;
810 }
811
812 if (invisibles.length() != 0) {
813 int attrIndex = writeAttr(names.RuntimeInvisibleTypeAnnotations);
814 databuf.appendChar(invisibles.length());
815 for (Attribute.TypeCompound p : invisibles)
816 writeTypeAnnotation(p);
817 endAttr(attrIndex);
818 attrCount++;
819 }
820
821 return attrCount;
822 }
823
824 /** A visitor to write an attribute including its leading
825 * single-character marker.
826 */
827 class AttributeWriter implements Attribute.Visitor {
828 public void visitConstant(Attribute.Constant _value) {
829 Object value = _value.value;
830 switch (_value.type.getTag()) {
831 case BYTE:
832 databuf.appendByte('B');
833 break;
834 case CHAR:
835 databuf.appendByte('C');
836 break;
837 case SHORT:
838 databuf.appendByte('S');
839 break;
840 case INT:
841 databuf.appendByte('I');
842 break;
843 case LONG:
844 databuf.appendByte('J');
845 break;
846 case FLOAT:
847 databuf.appendByte('F');
848 break;
849 case DOUBLE:
850 databuf.appendByte('D');
851 break;
852 case BOOLEAN:
853 databuf.appendByte('Z');
854 break;
855 case CLASS:
856 Assert.check(value instanceof String);
857 databuf.appendByte('s');
858 value = names.fromString(value.toString()); // CONSTANT_Utf8
859 break;
860 default:
861 throw new AssertionError(_value.type);
862 }
863 databuf.appendChar(pool.put(value));
864 }
865 public void visitEnum(Attribute.Enum e) {
866 databuf.appendByte('e');
867 databuf.appendChar(pool.put(typeSig(e.value.type)));
868 databuf.appendChar(pool.put(e.value.name));
869 }
870 public void visitClass(Attribute.Class clazz) {
871 databuf.appendByte('c');
872 databuf.appendChar(pool.put(typeSig(clazz.classType)));
873 }
874 public void visitCompound(Attribute.Compound compound) {
875 databuf.appendByte('@');
876 writeCompoundAttribute(compound);
877 }
878 public void visitError(Attribute.Error x) {
879 throw new AssertionError(x);
880 }
881 public void visitArray(Attribute.Array array) {
882 databuf.appendByte('[');
883 databuf.appendChar(array.values.length);
884 for (Attribute a : array.values) {
885 a.accept(this);
886 }
887 }
888 }
889 AttributeWriter awriter = new AttributeWriter();
890
891 /** Write a compound attribute excluding the '@' marker. */
892 void writeCompoundAttribute(Attribute.Compound c) {
893 databuf.appendChar(pool.put(typeSig(c.type)));
894 databuf.appendChar(c.values.length());
895 for (Pair<Symbol.MethodSymbol,Attribute> p : c.values) {
896 databuf.appendChar(pool.put(p.fst.name));
897 p.snd.accept(awriter);
898 }
899 }
900
901 void writeTypeAnnotation(Attribute.TypeCompound c) {
902 writePosition(c.position);
903 writeCompoundAttribute(c);
904 }
905
906 void writePosition(TypeAnnotationPosition p) {
907 databuf.appendByte(p.type.targetTypeValue()); // TargetType tag is a byte
908 switch (p.type) {
909 // instanceof
910 case INSTANCEOF:
911 // new expression
912 case NEW:
913 // constructor/method reference receiver
914 case CONSTRUCTOR_REFERENCE:
915 case METHOD_REFERENCE:
916 databuf.appendChar(p.offset);
917 break;
918 // local variable
919 case LOCAL_VARIABLE:
920 // resource variable
921 case RESOURCE_VARIABLE:
922 databuf.appendChar(p.lvarOffset.length); // for table length
923 for (int i = 0; i < p.lvarOffset.length; ++i) {
924 databuf.appendChar(p.lvarOffset[i]);
925 databuf.appendChar(p.lvarLength[i]);
926 databuf.appendChar(p.lvarIndex[i]);
927 }
928 break;
929 // exception parameter
930 case EXCEPTION_PARAMETER:
931 databuf.appendChar(p.exception_index);
932 break;
933 // method receiver
934 case METHOD_RECEIVER:
935 // Do nothing
936 break;
937 // type parameter
938 case CLASS_TYPE_PARAMETER:
939 case METHOD_TYPE_PARAMETER:
940 databuf.appendByte(p.parameter_index);
941 break;
942 // type parameter bound
943 case CLASS_TYPE_PARAMETER_BOUND:
944 case METHOD_TYPE_PARAMETER_BOUND:
945 databuf.appendByte(p.parameter_index);
946 databuf.appendByte(p.bound_index);
947 break;
948 // class extends or implements clause
949 case CLASS_EXTENDS:
950 databuf.appendChar(p.type_index);
951 break;
952 // throws
953 case THROWS:
954 databuf.appendChar(p.type_index);
955 break;
956 // method parameter
957 case METHOD_FORMAL_PARAMETER:
958 databuf.appendByte(p.parameter_index);
959 break;
960 // type cast
961 case CAST:
962 // method/constructor/reference type argument
963 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
964 case METHOD_INVOCATION_TYPE_ARGUMENT:
965 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
966 case METHOD_REFERENCE_TYPE_ARGUMENT:
967 databuf.appendChar(p.offset);
968 databuf.appendByte(p.type_index);
969 break;
970 // We don't need to worry about these
971 case METHOD_RETURN:
972 case FIELD:
973 break;
974 case UNKNOWN:
975 throw new AssertionError("jvm.ClassWriter: UNKNOWN target type should never occur!");
976 default:
977 throw new AssertionError("jvm.ClassWriter: Unknown target type for position: " + p);
978 }
979
980 { // Append location data for generics/arrays.
981 databuf.appendByte(p.location.size());
982 java.util.List<Integer> loc = TypeAnnotationPosition.getBinaryFromTypePath(p.location);
983 for (int i : loc)
984 databuf.appendByte((byte)i);
985 }
986 }
987
988 /**********************************************************************
989 * Writing Objects
990 **********************************************************************/
991
992 /** Enter an inner class into the `innerClasses' set/queue.
993 */
994 void enterInner(ClassSymbol c) {
995 if (c.type.isCompound()) {
996 throw new AssertionError("Unexpected intersection type: " + c.type);
997 }
998 try {
999 c.complete();
1000 } catch (CompletionFailure ex) {
1001 System.err.println("error: " + c + ": " + ex.getMessage());
1002 throw ex;
1003 }
1004 if (!c.type.hasTag(CLASS)) return; // arrays
1005 if (pool != null && // pool might be null if called from xClassName
1006 c.owner.enclClass() != null &&
1007 (innerClasses == null || !innerClasses.contains(c))) {
1008 // log.errWriter.println("enter inner " + c);//DEBUG
1009 enterInner(c.owner.enclClass());
1010 pool.put(c);
1011 if (c.name != names.empty)
1012 pool.put(c.name);
1013 if (innerClasses == null) {
1014 innerClasses = new HashSet<ClassSymbol>();
1015 innerClassesQueue = new ListBuffer<ClassSymbol>();
1016 pool.put(names.InnerClasses);
1017 }
1018 innerClasses.add(c);
1019 innerClassesQueue.append(c);
1020 }
1021 }
1022
1023 /** Write "inner classes" attribute.
1024 */
1025 void writeInnerClasses() {
1026 int alenIdx = writeAttr(names.InnerClasses);
1027 databuf.appendChar(innerClassesQueue.length());
1028 for (List<ClassSymbol> l = innerClassesQueue.toList();
1029 l.nonEmpty();
1030 l = l.tail) {
1031 ClassSymbol inner = l.head;
1032 char flags = (char) adjustFlags(inner.flags_field);
1033 if ((flags & INTERFACE) != 0) flags |= ABSTRACT; // Interfaces are always ABSTRACT
1034 if (inner.name.isEmpty()) flags &= ~FINAL; // Anonymous class: unset FINAL flag
1035 flags &= ~STRICTFP; //inner classes should not have the strictfp flag set.
1036 if (dumpInnerClassModifiers) {
1037 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
1038 pw.println("INNERCLASS " + inner.name);
1039 pw.println("---" + flagNames(flags));
1040 }
1041 databuf.appendChar(pool.get(inner));
1042 databuf.appendChar(
1043 inner.owner.kind == TYP ? pool.get(inner.owner) : 0);
1044 databuf.appendChar(
1045 !inner.name.isEmpty() ? pool.get(inner.name) : 0);
1046 databuf.appendChar(flags);
1047 }
1048 endAttr(alenIdx);
1049 }
1050
1051 /** Write "bootstrapMethods" attribute.
1052 */
1053 void writeBootstrapMethods() {
1054 int alenIdx = writeAttr(names.BootstrapMethods);
1055 databuf.appendChar(bootstrapMethods.size());
1056 for (Map.Entry<DynamicMethod, MethodHandle> entry : bootstrapMethods.entrySet()) {
1057 DynamicMethod dmeth = entry.getKey();
1058 DynamicMethodSymbol dsym = (DynamicMethodSymbol)dmeth.baseSymbol();
1059 //write BSM handle
1060 databuf.appendChar(pool.get(entry.getValue()));
1061 //write static args length
1062 databuf.appendChar(dsym.staticArgs.length);
1063 //write static args array
1064 Object[] uniqueArgs = dmeth.uniqueStaticArgs;
1065 for (Object o : uniqueArgs) {
1066 databuf.appendChar(pool.get(o));
1067 }
1068 }
1069 endAttr(alenIdx);
1070 }
1071
1072 /** Write field symbol, entering all references into constant pool.
1073 */
1074 void writeField(VarSymbol v) {
1075 int flags = adjustFlags(v.flags());
1076 databuf.appendChar(flags);
1077 if (dumpFieldModifiers) {
1078 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
1079 pw.println("FIELD " + fieldName(v));
1080 pw.println("---" + flagNames(v.flags()));
1081 }
1082 databuf.appendChar(pool.put(fieldName(v)));
1083 databuf.appendChar(pool.put(typeSig(v.erasure(types))));
1084 int acountIdx = beginAttrs();
1085 int acount = 0;
1086 if (v.getConstValue() != null) {
1087 int alenIdx = writeAttr(names.ConstantValue);
1088 databuf.appendChar(pool.put(v.getConstValue()));
1089 endAttr(alenIdx);
1090 acount++;
1091 }
1092 acount += writeMemberAttrs(v);
1093 endAttrs(acountIdx, acount);
1094 }
1095
1096 /** Write method symbol, entering all references into constant pool.
1097 */
1098 void writeMethod(MethodSymbol m) {
1099 int flags = adjustFlags(m.flags());
1100 databuf.appendChar(flags);
1101 if (dumpMethodModifiers) {
1102 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
1103 pw.println("METHOD " + fieldName(m));
1104 pw.println("---" + flagNames(m.flags()));
1105 }
1106 databuf.appendChar(pool.put(fieldName(m)));
1107 databuf.appendChar(pool.put(typeSig(m.externalType(types))));
1108 int acountIdx = beginAttrs();
1109 int acount = 0;
1110 if (m.code != null) {
1111 int alenIdx = writeAttr(names.Code);
1112 writeCode(m.code);
1113 m.code = null; // to conserve space
1114 endAttr(alenIdx);
1115 acount++;
1116 }
1117 List<Type> thrown = m.erasure(types).getThrownTypes();
1118 if (thrown.nonEmpty()) {
1119 int alenIdx = writeAttr(names.Exceptions);
1120 databuf.appendChar(thrown.length());
1121 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail)
1122 databuf.appendChar(pool.put(l.head.tsym));
1123 endAttr(alenIdx);
1124 acount++;
1125 }
1126 if (m.defaultValue != null) {
1127 int alenIdx = writeAttr(names.AnnotationDefault);
1128 m.defaultValue.accept(awriter);
1129 endAttr(alenIdx);
1130 acount++;
1131 }
1132 if (options.isSet(PARAMETERS))
1133 acount += writeMethodParametersAttr(m);
1134 acount += writeMemberAttrs(m);
1135 acount += writeParameterAttrs(m);
1136 endAttrs(acountIdx, acount);
1137 }
1138
1139 /** Write code attribute of method.
1140 */
1141 void writeCode(Code code) {
1142 databuf.appendChar(code.max_stack);
1143 databuf.appendChar(code.max_locals);
1144 databuf.appendInt(code.cp);
1145 databuf.appendBytes(code.code, 0, code.cp);
1146 databuf.appendChar(code.catchInfo.length());
1147 for (List<char[]> l = code.catchInfo.toList();
1148 l.nonEmpty();
1149 l = l.tail) {
1150 for (int i = 0; i < l.head.length; i++)
1151 databuf.appendChar(l.head[i]);
1152 }
1153 int acountIdx = beginAttrs();
1154 int acount = 0;
1155
1156 if (code.lineInfo.nonEmpty()) {
1157 int alenIdx = writeAttr(names.LineNumberTable);
1158 databuf.appendChar(code.lineInfo.length());
1159 for (List<char[]> l = code.lineInfo.reverse();
1160 l.nonEmpty();
1161 l = l.tail)
1162 for (int i = 0; i < l.head.length; i++)
1163 databuf.appendChar(l.head[i]);
1164 endAttr(alenIdx);
1165 acount++;
1166 }
1167
1168 if (genCrt && (code.crt != null)) {
1169 CRTable crt = code.crt;
1170 int alenIdx = writeAttr(names.CharacterRangeTable);
1171 int crtIdx = beginAttrs();
1172 int crtEntries = crt.writeCRT(databuf, code.lineMap, log);
1173 endAttrs(crtIdx, crtEntries);
1174 endAttr(alenIdx);
1175 acount++;
1176 }
1177
1178 // counter for number of generic local variables
1179 int nGenericVars = 0;
1180
1181 if (code.varBufferSize > 0) {
1182 int alenIdx = writeAttr(names.LocalVariableTable);
1183 databuf.appendChar(code.varBufferSize);
1184
1185 for (int i=0; i<code.varBufferSize; i++) {
1186 Code.LocalVar var = code.varBuffer[i];
1187
1188 // write variable info
1189 Assert.check(var.start_pc >= 0
1190 && var.start_pc <= code.cp);
1191 databuf.appendChar(var.start_pc);
1192 Assert.check(var.length >= 0
1193 && (var.start_pc + var.length) <= code.cp);
1194 databuf.appendChar(var.length);
1195 VarSymbol sym = var.sym;
1196 databuf.appendChar(pool.put(sym.name));
1197 Type vartype = sym.erasure(types);
1198 if (needsLocalVariableTypeEntry(sym.type))
1199 nGenericVars++;
1200 databuf.appendChar(pool.put(typeSig(vartype)));
1201 databuf.appendChar(var.reg);
1202 }
1203 endAttr(alenIdx);
1204 acount++;
1205 }
1206
1207 if (nGenericVars > 0) {
1208 int alenIdx = writeAttr(names.LocalVariableTypeTable);
1209 databuf.appendChar(nGenericVars);
1210 int count = 0;
1211
1212 for (int i=0; i<code.varBufferSize; i++) {
1213 Code.LocalVar var = code.varBuffer[i];
1214 VarSymbol sym = var.sym;
1215 if (!needsLocalVariableTypeEntry(sym.type))
1216 continue;
1217 count++;
1218 // write variable info
1219 databuf.appendChar(var.start_pc);
1220 databuf.appendChar(var.length);
1221 databuf.appendChar(pool.put(sym.name));
1222 databuf.appendChar(pool.put(typeSig(sym.type)));
1223 databuf.appendChar(var.reg);
1224 }
1225 Assert.check(count == nGenericVars);
1226 endAttr(alenIdx);
1227 acount++;
1228 }
1229
1230 if (code.stackMapBufferSize > 0) {
1231 if (debugstackmap) System.out.println("Stack map for " + code.meth);
1232 int alenIdx = writeAttr(code.stackMap.getAttributeName(names));
1233 writeStackMap(code);
1234 endAttr(alenIdx);
1235 acount++;
1236 }
1237
1238 acount += writeTypeAnnotations(code.meth.getRawTypeAttributes(), true);
1239
1240 endAttrs(acountIdx, acount);
1241 }
1242 //where
1243 private boolean needsLocalVariableTypeEntry(Type t) {
1244 //a local variable needs a type-entry if its type T is generic
1245 //(i.e. |T| != T) and if it's not an intersection type (not supported
1246 //in signature attribute grammar)
1247 return (!types.isSameType(t, types.erasure(t)) &&
1248 !t.isCompound());
1249 }
1250
1251 void writeStackMap(Code code) {
1252 int nframes = code.stackMapBufferSize;
1253 if (debugstackmap) System.out.println(" nframes = " + nframes);
1254 databuf.appendChar(nframes);
1255
1256 switch (code.stackMap) {
1257 case CLDC:
1258 for (int i=0; i<nframes; i++) {
1259 if (debugstackmap) System.out.print(" " + i + ":");
1260 Code.StackMapFrame frame = code.stackMapBuffer[i];
1261
1262 // output PC
1263 if (debugstackmap) System.out.print(" pc=" + frame.pc);
1264 databuf.appendChar(frame.pc);
1265
1266 // output locals
1267 int localCount = 0;
1268 for (int j=0; j<frame.locals.length;
1269 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
1270 localCount++;
1271 }
1272 if (debugstackmap) System.out.print(" nlocals=" +
1273 localCount);
1274 databuf.appendChar(localCount);
1275 for (int j=0; j<frame.locals.length;
1276 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
1277 if (debugstackmap) System.out.print(" local[" + j + "]=");
1278 writeStackMapType(frame.locals[j]);
1279 }
1280
1281 // output stack
1282 int stackCount = 0;
1283 for (int j=0; j<frame.stack.length;
1284 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
1285 stackCount++;
1286 }
1287 if (debugstackmap) System.out.print(" nstack=" +
1288 stackCount);
1289 databuf.appendChar(stackCount);
1290 for (int j=0; j<frame.stack.length;
1291 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
1292 if (debugstackmap) System.out.print(" stack[" + j + "]=");
1293 writeStackMapType(frame.stack[j]);
1294 }
1295 if (debugstackmap) System.out.println();
1296 }
1297 break;
1298 case JSR202: {
1299 Assert.checkNull(code.stackMapBuffer);
1300 for (int i=0; i<nframes; i++) {
1301 if (debugstackmap) System.out.print(" " + i + ":");
1302 StackMapTableFrame frame = code.stackMapTableBuffer[i];
1303 frame.write(this);
1304 if (debugstackmap) System.out.println();
1305 }
1306 break;
1307 }
1308 default:
1309 throw new AssertionError("Unexpected stackmap format value");
1310 }
1311 }
1312
1313 //where
1314 void writeStackMapType(Type t) {
1315 if (t == null) {
1316 if (debugstackmap) System.out.print("empty");
1317 databuf.appendByte(0);
1318 }
1319 else switch(t.getTag()) {
1320 case BYTE:
1321 case CHAR:
1322 case SHORT:
1323 case INT:
1324 case BOOLEAN:
1325 if (debugstackmap) System.out.print("int");
1326 databuf.appendByte(1);
1327 break;
1328 case FLOAT:
1329 if (debugstackmap) System.out.print("float");
1330 databuf.appendByte(2);
1331 break;
1332 case DOUBLE:
1333 if (debugstackmap) System.out.print("double");
1334 databuf.appendByte(3);
1335 break;
1336 case LONG:
1337 if (debugstackmap) System.out.print("long");
1338 databuf.appendByte(4);
1339 break;
1340 case BOT: // null
1341 if (debugstackmap) System.out.print("null");
1342 databuf.appendByte(5);
1343 break;
1344 case CLASS:
1345 case ARRAY:
1346 if (debugstackmap) System.out.print("object(" + t + ")");
1347 databuf.appendByte(7);
1348 databuf.appendChar(pool.put(t));
1349 break;
1350 case TYPEVAR:
1351 if (debugstackmap) System.out.print("object(" + types.erasure(t).tsym + ")");
1352 databuf.appendByte(7);
1353 databuf.appendChar(pool.put(types.erasure(t).tsym));
1354 break;
1355 case UNINITIALIZED_THIS:
1356 if (debugstackmap) System.out.print("uninit_this");
1357 databuf.appendByte(6);
1358 break;
1359 case UNINITIALIZED_OBJECT:
1360 { UninitializedType uninitType = (UninitializedType)t;
1361 databuf.appendByte(8);
1362 if (debugstackmap) System.out.print("uninit_object@" + uninitType.offset);
1363 databuf.appendChar(uninitType.offset);
1364 }
1365 break;
1366 default:
1367 throw new AssertionError();
1368 }
1369 }
1370
1371 /** An entry in the JSR202 StackMapTable */
1372 abstract static class StackMapTableFrame {
1373 abstract int getFrameType();
1374
1375 void write(ClassWriter writer) {
1376 int frameType = getFrameType();
1377 writer.databuf.appendByte(frameType);
1378 if (writer.debugstackmap) System.out.print(" frame_type=" + frameType);
1379 }
1380
1381 static class SameFrame extends StackMapTableFrame {
1382 final int offsetDelta;
1383 SameFrame(int offsetDelta) {
1384 this.offsetDelta = offsetDelta;
1385 }
1386 int getFrameType() {
1387 return (offsetDelta < SAME_FRAME_SIZE) ? offsetDelta : SAME_FRAME_EXTENDED;
1388 }
1389 @Override
1390 void write(ClassWriter writer) {
1391 super.write(writer);
1392 if (getFrameType() == SAME_FRAME_EXTENDED) {
1393 writer.databuf.appendChar(offsetDelta);
1394 if (writer.debugstackmap){
1395 System.out.print(" offset_delta=" + offsetDelta);
1396 }
1397 }
1398 }
1399 }
1400
1401 static class SameLocals1StackItemFrame extends StackMapTableFrame {
1402 final int offsetDelta;
1403 final Type stack;
1404 SameLocals1StackItemFrame(int offsetDelta, Type stack) {
1405 this.offsetDelta = offsetDelta;
1406 this.stack = stack;
1407 }
1408 int getFrameType() {
1409 return (offsetDelta < SAME_FRAME_SIZE) ?
1410 (SAME_FRAME_SIZE + offsetDelta) :
1411 SAME_LOCALS_1_STACK_ITEM_EXTENDED;
1412 }
1413 @Override
1414 void write(ClassWriter writer) {
1415 super.write(writer);
1416 if (getFrameType() == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
1417 writer.databuf.appendChar(offsetDelta);
1418 if (writer.debugstackmap) {
1419 System.out.print(" offset_delta=" + offsetDelta);
1420 }
1421 }
1422 if (writer.debugstackmap) {
1423 System.out.print(" stack[" + 0 + "]=");
1424 }
1425 writer.writeStackMapType(stack);
1426 }
1427 }
1428
1429 static class ChopFrame extends StackMapTableFrame {
1430 final int frameType;
1431 final int offsetDelta;
1432 ChopFrame(int frameType, int offsetDelta) {
1433 this.frameType = frameType;
1434 this.offsetDelta = offsetDelta;
1435 }
1436 int getFrameType() { return frameType; }
1437 @Override
1438 void write(ClassWriter writer) {
1439 super.write(writer);
1440 writer.databuf.appendChar(offsetDelta);
1441 if (writer.debugstackmap) {
1442 System.out.print(" offset_delta=" + offsetDelta);
1443 }
1444 }
1445 }
1446
1447 static class AppendFrame extends StackMapTableFrame {
1448 final int frameType;
1449 final int offsetDelta;
1450 final Type[] locals;
1451 AppendFrame(int frameType, int offsetDelta, Type[] locals) {
1452 this.frameType = frameType;
1453 this.offsetDelta = offsetDelta;
1454 this.locals = locals;
1455 }
1456 int getFrameType() { return frameType; }
1457 @Override
1458 void write(ClassWriter writer) {
1459 super.write(writer);
1460 writer.databuf.appendChar(offsetDelta);
1461 if (writer.debugstackmap) {
1462 System.out.print(" offset_delta=" + offsetDelta);
1463 }
1464 for (int i=0; i<locals.length; i++) {
1465 if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
1466 writer.writeStackMapType(locals[i]);
1467 }
1468 }
1469 }
1470
1471 static class FullFrame extends StackMapTableFrame {
1472 final int offsetDelta;
1473 final Type[] locals;
1474 final Type[] stack;
1475 FullFrame(int offsetDelta, Type[] locals, Type[] stack) {
1476 this.offsetDelta = offsetDelta;
1477 this.locals = locals;
1478 this.stack = stack;
1479 }
1480 int getFrameType() { return FULL_FRAME; }
1481 @Override
1482 void write(ClassWriter writer) {
1483 super.write(writer);
1484 writer.databuf.appendChar(offsetDelta);
1485 writer.databuf.appendChar(locals.length);
1486 if (writer.debugstackmap) {
1487 System.out.print(" offset_delta=" + offsetDelta);
1488 System.out.print(" nlocals=" + locals.length);
1489 }
1490 for (int i=0; i<locals.length; i++) {
1491 if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
1492 writer.writeStackMapType(locals[i]);
1493 }
1494
1495 writer.databuf.appendChar(stack.length);
1496 if (writer.debugstackmap) { System.out.print(" nstack=" + stack.length); }
1497 for (int i=0; i<stack.length; i++) {
1498 if (writer.debugstackmap) System.out.print(" stack[" + i + "]=");
1499 writer.writeStackMapType(stack[i]);
1500 }
1501 }
1502 }
1503
1504 /** Compare this frame with the previous frame and produce
1505 * an entry of compressed stack map frame. */
1506 static StackMapTableFrame getInstance(Code.StackMapFrame this_frame,
1507 int prev_pc,
1508 Type[] prev_locals,
1509 Types types) {
1510 Type[] locals = this_frame.locals;
1511 Type[] stack = this_frame.stack;
1512 int offset_delta = this_frame.pc - prev_pc - 1;
1513 if (stack.length == 1) {
1514 if (locals.length == prev_locals.length
1515 && compare(prev_locals, locals, types) == 0) {
1516 return new SameLocals1StackItemFrame(offset_delta, stack[0]);
1517 }
1518 } else if (stack.length == 0) {
1519 int diff_length = compare(prev_locals, locals, types);
1520 if (diff_length == 0) {
1521 return new SameFrame(offset_delta);
1522 } else if (-MAX_LOCAL_LENGTH_DIFF < diff_length && diff_length < 0) {
1523 // APPEND
1524 Type[] local_diff = new Type[-diff_length];
1525 for (int i=prev_locals.length, j=0; i<locals.length; i++,j++) {
1526 local_diff[j] = locals[i];
1527 }
1528 return new AppendFrame(SAME_FRAME_EXTENDED - diff_length,
1529 offset_delta,
1530 local_diff);
1531 } else if (0 < diff_length && diff_length < MAX_LOCAL_LENGTH_DIFF) {
1532 // CHOP
1533 return new ChopFrame(SAME_FRAME_EXTENDED - diff_length,
1534 offset_delta);
1535 }
1536 }
1537 // FULL_FRAME
1538 return new FullFrame(offset_delta, locals, stack);
1539 }
1540
1541 static boolean isInt(Type t) {
1542 return (t.getTag().isStrictSubRangeOf(INT) || t.hasTag(BOOLEAN));
1543 }
1544
1545 static boolean isSameType(Type t1, Type t2, Types types) {
1546 if (t1 == null) { return t2 == null; }
1547 if (t2 == null) { return false; }
1548
1549 if (isInt(t1) && isInt(t2)) { return true; }
1550
1551 if (t1.hasTag(UNINITIALIZED_THIS)) {
1552 return t2.hasTag(UNINITIALIZED_THIS);
1553 } else if (t1.hasTag(UNINITIALIZED_OBJECT)) {
1554 if (t2.hasTag(UNINITIALIZED_OBJECT)) {
1555 return ((UninitializedType)t1).offset == ((UninitializedType)t2).offset;
1556 } else {
1557 return false;
1558 }
1559 } else if (t2.hasTag(UNINITIALIZED_THIS) || t2.hasTag(UNINITIALIZED_OBJECT)) {
1560 return false;
1561 }
1562
1563 return types.isSameType(t1, t2);
1564 }
1565
1566 static int compare(Type[] arr1, Type[] arr2, Types types) {
1567 int diff_length = arr1.length - arr2.length;
1568 if (diff_length > MAX_LOCAL_LENGTH_DIFF || diff_length < -MAX_LOCAL_LENGTH_DIFF) {
1569 return Integer.MAX_VALUE;
1570 }
1571 int len = (diff_length > 0) ? arr2.length : arr1.length;
1572 for (int i=0; i<len; i++) {
1573 if (!isSameType(arr1[i], arr2[i], types)) {
1574 return Integer.MAX_VALUE;
1575 }
1576 }
1577 return diff_length;
1578 }
1579 }
1580
1581 void writeFields(Scope.Entry e) {
1582 // process them in reverse sibling order;
1583 // i.e., process them in declaration order.
1584 List<VarSymbol> vars = List.nil();
1585 for (Scope.Entry i = e; i != null; i = i.sibling) {
1586 if (i.sym.kind == VAR) vars = vars.prepend((VarSymbol)i.sym);
1587 }
1588 while (vars.nonEmpty()) {
1589 writeField(vars.head);
1590 vars = vars.tail;
1591 }
1592 }
1593
1594 void writeMethods(Scope.Entry e) {
1595 List<MethodSymbol> methods = List.nil();
1596 for (Scope.Entry i = e; i != null; i = i.sibling) {
1597 if (i.sym.kind == MTH && (i.sym.flags() & HYPOTHETICAL) == 0)
1598 methods = methods.prepend((MethodSymbol)i.sym);
1599 }
1600 while (methods.nonEmpty()) {
1601 writeMethod(methods.head);
1602 methods = methods.tail;
1603 }
1604 }
1605
1606 /** Emit a class file for a given class.
1607 * @param c The class from which a class file is generated.
1608 */
1609 public JavaFileObject writeClass(ClassSymbol c)
1610 throws IOException, PoolOverflow, StringOverflow
1611 {
1612 JavaFileObject outFile
1613 = fileManager.getJavaFileForOutput(CLASS_OUTPUT,
1614 c.flatname.toString(),
1615 JavaFileObject.Kind.CLASS,
1616 c.sourcefile);
1617 OutputStream out = outFile.openOutputStream();
1618 try {
1619 writeClassFile(out, c);
1620 if (verbose)
1621 log.printVerbose("wrote.file", outFile);
1622 out.close();
1623 out = null;
1624 } finally {
1625 if (out != null) {
1626 // if we are propagating an exception, delete the file
1627 out.close();
1628 outFile.delete();
1629 outFile = null;
1630 }
1631 }
1632 return outFile; // may be null if write failed
1633 }
1634
1635 /** Write class `c' to outstream `out'.
1636 */
1637 public void writeClassFile(OutputStream out, ClassSymbol c)
1638 throws IOException, PoolOverflow, StringOverflow {
1639 Assert.check((c.flags() & COMPOUND) == 0);
1640 databuf.reset();
1641 poolbuf.reset();
1642 signatureGen.reset();
1643 pool = c.pool;
1644 innerClasses = null;
1645 innerClassesQueue = null;
1646 bootstrapMethods = new LinkedHashMap<DynamicMethod, MethodHandle>();
1647
1648 Type supertype = types.supertype(c.type);
1649 List<Type> interfaces = types.interfaces(c.type);
1650 List<Type> typarams = c.type.getTypeArguments();
1651
1652 int flags = adjustFlags(c.flags() & ~DEFAULT);
1653 if ((flags & PROTECTED) != 0) flags |= PUBLIC;
1654 flags = flags & ClassFlags & ~STRICTFP;
1655 if ((flags & INTERFACE) == 0) flags |= ACC_SUPER;
1656 if (c.isInner() && c.name.isEmpty()) flags &= ~FINAL;
1657 if (dumpClassModifiers) {
1658 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
1659 pw.println();
1660 pw.println("CLASSFILE " + c.getQualifiedName());
1661 pw.println("---" + flagNames(flags));
1662 }
1663 databuf.appendChar(flags);
1664
1665 databuf.appendChar(pool.put(c));
1666 databuf.appendChar(supertype.hasTag(CLASS) ? pool.put(supertype.tsym) : 0);
1667 databuf.appendChar(interfaces.length());
1668 for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
1669 databuf.appendChar(pool.put(l.head.tsym));
1670 int fieldsCount = 0;
1671 int methodsCount = 0;
1672 for (Scope.Entry e = c.members().elems; e != null; e = e.sibling) {
1673 switch (e.sym.kind) {
1674 case VAR: fieldsCount++; break;
1675 case MTH: if ((e.sym.flags() & HYPOTHETICAL) == 0) methodsCount++;
1676 break;
1677 case TYP: enterInner((ClassSymbol)e.sym); break;
1678 default : Assert.error();
1679 }
1680 }
1681
1682 if (c.trans_local != null) {
1683 for (ClassSymbol local : c.trans_local) {
1684 enterInner(local);
1685 }
1686 }
1687
1688 databuf.appendChar(fieldsCount);
1689 writeFields(c.members().elems);
1690 databuf.appendChar(methodsCount);
1691 writeMethods(c.members().elems);
1692
1693 int acountIdx = beginAttrs();
1694 int acount = 0;
1695
1696 boolean sigReq =
1697 typarams.length() != 0 || supertype.allparams().length() != 0;
1698 for (List<Type> l = interfaces; !sigReq && l.nonEmpty(); l = l.tail)
1699 sigReq = l.head.allparams().length() != 0;
1700 if (sigReq) {
1701 Assert.check(source.allowGenerics());
1702 int alenIdx = writeAttr(names.Signature);
1703 if (typarams.length() != 0) signatureGen.assembleParamsSig(typarams);
1704 signatureGen.assembleSig(supertype);
1705 for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
1706 signatureGen.assembleSig(l.head);
1707 databuf.appendChar(pool.put(signatureGen.toName()));
1708 signatureGen.reset();
1709 endAttr(alenIdx);
1710 acount++;
1711 }
1712
1713 if (c.sourcefile != null && emitSourceFile) {
1714 int alenIdx = writeAttr(names.SourceFile);
1715 // WHM 6/29/1999: Strip file path prefix. We do it here at
1716 // the last possible moment because the sourcefile may be used
1717 // elsewhere in error diagnostics. Fixes 4241573.
1718 //databuf.appendChar(c.pool.put(c.sourcefile));
1719 String simpleName = BaseFileObject.getSimpleName(c.sourcefile);
1720 databuf.appendChar(c.pool.put(names.fromString(simpleName)));
1721 endAttr(alenIdx);
1722 acount++;
1723 }
1724
1725 if (genCrt) {
1726 // Append SourceID attribute
1727 int alenIdx = writeAttr(names.SourceID);
1728 databuf.appendChar(c.pool.put(names.fromString(Long.toString(getLastModified(c.sourcefile)))));
1729 endAttr(alenIdx);
1730 acount++;
1731 // Append CompilationID attribute
1732 alenIdx = writeAttr(names.CompilationID);
1733 databuf.appendChar(c.pool.put(names.fromString(Long.toString(System.currentTimeMillis()))));
1734 endAttr(alenIdx);
1735 acount++;
1736 }
1737
1738 acount += writeFlagAttrs(c.flags());
1739 acount += writeJavaAnnotations(c.getRawAttributes());
1740 acount += writeTypeAnnotations(c.getRawTypeAttributes(), false);
1741 acount += writeEnclosingMethodAttribute(c);
1742 acount += writeExtraClassAttributes(c);
1743
1744 poolbuf.appendInt(JAVA_MAGIC);
1745 poolbuf.appendChar(target.minorVersion);
1746 poolbuf.appendChar(target.majorVersion);
1747
1748 writePool(c.pool);
1749
1750 if (innerClasses != null) {
1751 writeInnerClasses();
1752 acount++;
1753 }
1754
1755 if (!bootstrapMethods.isEmpty()) {
1756 writeBootstrapMethods();
1757 acount++;
1758 }
1759
1760 endAttrs(acountIdx, acount);
1761
1762 poolbuf.appendBytes(databuf.elems, 0, databuf.length);
1763 out.write(poolbuf.elems, 0, poolbuf.length);
1764
1765 pool = c.pool = null; // to conserve space
1766 }
1767
1768 /**Allows subclasses to write additional class attributes
1769 *
1770 * @return the number of attributes written
1771 */
1772 protected int writeExtraClassAttributes(ClassSymbol c) {
1773 return 0;
1774 }
1775
1776 int adjustFlags(final long flags) {
1777 int result = (int)flags;
1778 if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag())
1779 result &= ~SYNTHETIC;
1780 if ((flags & ENUM) != 0 && !target.useEnumFlag())
1781 result &= ~ENUM;
1782 if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag())
1783 result &= ~ANNOTATION;
1784
1785 if ((flags & BRIDGE) != 0 && target.useBridgeFlag())
1786 result |= ACC_BRIDGE;
1787 if ((flags & VARARGS) != 0 && target.useVarargsFlag())
1788 result |= ACC_VARARGS;
1789 if ((flags & DEFAULT) != 0)
1790 result &= ~ABSTRACT;
1791 return result;
1792 }
1793
1794 long getLastModified(FileObject filename) {
1795 long mod = 0;
1796 try {
1797 mod = filename.getLastModified();
1798 } catch (SecurityException e) {
1799 throw new AssertionError("CRT: couldn't get source file modification date: " + e.getMessage());
1800 }
1801 return mod;
1802 }
1803 }