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src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java@38bd6375f37d
src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java
Tue, 04 Mar 2008 15:45:20 +0000
- author
- mcimadamore
- date
- Tue, 04 Mar 2008 15:45:20 +0000
- changeset 8
- 38bd6375f37d
- parent 1
- 9a66ca7c79fa
- child 113
- eff38cc97183
- permissions
- -rw-r--r--
6663588: Compiler goes into infinite loop for Cyclic Inheritance test case
Summary: interplay between cyclic inheritance and tvar bounds hangs javac
Reviewed-by: jjg
1 /*
2 * Copyright 1999-2006 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
26 package com.sun.tools.javac.jvm;
28 import java.io.*;
29 import java.util.*;
30 import java.util.Set;
31 import java.util.HashSet;
33 import javax.tools.JavaFileManager;
34 import javax.tools.FileObject;
35 import javax.tools.JavaFileObject;
37 import com.sun.tools.javac.code.*;
38 import com.sun.tools.javac.code.Symbol.*;
39 import com.sun.tools.javac.code.Type.*;
40 import com.sun.tools.javac.util.*;
41 import com.sun.tools.javac.util.List;
43 import static com.sun.tools.javac.code.BoundKind.*;
44 import static com.sun.tools.javac.code.Flags.*;
45 import static com.sun.tools.javac.code.Kinds.*;
46 import static com.sun.tools.javac.code.TypeTags.*;
47 import static com.sun.tools.javac.jvm.UninitializedType.*;
48 import static javax.tools.StandardLocation.CLASS_OUTPUT;
50 /** This class provides operations to map an internal symbol table graph
51 * rooted in a ClassSymbol into a classfile.
52 *
53 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
54 * you write code that depends on this, you do so at your own risk.
55 * This code and its internal interfaces are subject to change or
56 * deletion without notice.</b>
57 */
58 public class ClassWriter extends ClassFile {
59 protected static final Context.Key<ClassWriter> classWriterKey =
60 new Context.Key<ClassWriter>();
62 private final Symtab syms;
64 private final Options options;
66 /** Switch: verbose output.
67 */
68 private boolean verbose;
70 /** Switch: scrable private names.
71 */
72 private boolean scramble;
74 /** Switch: scrable private names.
75 */
76 private boolean scrambleAll;
78 /** Switch: retrofit mode.
79 */
80 private boolean retrofit;
82 /** Switch: emit source file attribute.
83 */
84 private boolean emitSourceFile;
86 /** Switch: generate CharacterRangeTable attribute.
87 */
88 private boolean genCrt;
90 /** Switch: describe the generated stackmap
91 */
92 boolean debugstackmap;
94 /**
95 * Target class version.
96 */
97 private Target target;
99 /**
100 * Source language version.
101 */
102 private Source source;
104 /** Type utilities. */
105 private Types types;
107 /** The initial sizes of the data and constant pool buffers.
108 * sizes are increased when buffers get full.
109 */
110 static final int DATA_BUF_SIZE = 0x0fff0;
111 static final int POOL_BUF_SIZE = 0x1fff0;
113 /** An output buffer for member info.
114 */
115 ByteBuffer databuf = new ByteBuffer(DATA_BUF_SIZE);
117 /** An output buffer for the constant pool.
118 */
119 ByteBuffer poolbuf = new ByteBuffer(POOL_BUF_SIZE);
121 /** An output buffer for type signatures.
122 */
123 ByteBuffer sigbuf = new ByteBuffer();
125 /** The constant pool.
126 */
127 Pool pool;
129 /** The inner classes to be written, as a set.
130 */
131 Set<ClassSymbol> innerClasses;
133 /** The inner classes to be written, as a queue where
134 * enclosing classes come first.
135 */
136 ListBuffer<ClassSymbol> innerClassesQueue;
138 /** The log to use for verbose output.
139 */
140 private final Log log;
142 /** The name table. */
143 private final Name.Table names;
145 /** Access to files. */
146 private final JavaFileManager fileManager;
148 /** The tags and constants used in compressed stackmap. */
149 static final int SAME_FRAME_SIZE = 64;
150 static final int SAME_LOCALS_1_STACK_ITEM_EXTENDED = 247;
151 static final int SAME_FRAME_EXTENDED = 251;
152 static final int FULL_FRAME = 255;
153 static final int MAX_LOCAL_LENGTH_DIFF = 4;
155 /** Get the ClassWriter instance for this context. */
156 public static ClassWriter instance(Context context) {
157 ClassWriter instance = context.get(classWriterKey);
158 if (instance == null)
159 instance = new ClassWriter(context);
160 return instance;
161 }
163 /** Construct a class writer, given an options table.
164 */
165 private ClassWriter(Context context) {
166 context.put(classWriterKey, this);
168 log = Log.instance(context);
169 names = Name.Table.instance(context);
170 syms = Symtab.instance(context);
171 options = Options.instance(context);
172 target = Target.instance(context);
173 source = Source.instance(context);
174 types = Types.instance(context);
175 fileManager = context.get(JavaFileManager.class);
177 verbose = options.get("-verbose") != null;
178 scramble = options.get("-scramble") != null;
179 scrambleAll = options.get("-scrambleAll") != null;
180 retrofit = options.get("-retrofit") != null;
181 genCrt = options.get("-Xjcov") != null;
182 debugstackmap = options.get("debugstackmap") != null;
184 emitSourceFile = options.get("-g:")==null || options.get("-g:source")!=null;
186 String dumpModFlags = options.get("dumpmodifiers");
187 dumpClassModifiers =
188 (dumpModFlags != null && dumpModFlags.indexOf('c') != -1);
189 dumpFieldModifiers =
190 (dumpModFlags != null && dumpModFlags.indexOf('f') != -1);
191 dumpInnerClassModifiers =
192 (dumpModFlags != null && dumpModFlags.indexOf('i') != -1);
193 dumpMethodModifiers =
194 (dumpModFlags != null && dumpModFlags.indexOf('m') != -1);
195 }
197 /******************************************************************
198 * Diagnostics: dump generated class names and modifiers
199 ******************************************************************/
201 /** Value of option 'dumpmodifiers' is a string
202 * indicating which modifiers should be dumped for debugging:
203 * 'c' -- classes
204 * 'f' -- fields
205 * 'i' -- innerclass attributes
206 * 'm' -- methods
207 * For example, to dump everything:
208 * javac -XDdumpmodifiers=cifm MyProg.java
209 */
210 private final boolean dumpClassModifiers; // -XDdumpmodifiers=c
211 private final boolean dumpFieldModifiers; // -XDdumpmodifiers=f
212 private final boolean dumpInnerClassModifiers; // -XDdumpmodifiers=i
213 private final boolean dumpMethodModifiers; // -XDdumpmodifiers=m
216 /** Return flags as a string, separated by " ".
217 */
218 public static String flagNames(long flags) {
219 StringBuffer sbuf = new StringBuffer();
220 int i = 0;
221 long f = flags & StandardFlags;
222 while (f != 0) {
223 if ((f & 1) != 0) sbuf.append(" " + flagName[i]);
224 f = f >> 1;
225 i++;
226 }
227 return sbuf.toString();
228 }
229 //where
230 private final static String[] flagName = {
231 "PUBLIC", "PRIVATE", "PROTECTED", "STATIC", "FINAL",
232 "SUPER", "VOLATILE", "TRANSIENT", "NATIVE", "INTERFACE",
233 "ABSTRACT", "STRICTFP"};
235 /******************************************************************
236 * Output routines
237 ******************************************************************/
239 /** Write a character into given byte buffer;
240 * byte buffer will not be grown.
241 */
242 void putChar(ByteBuffer buf, int op, int x) {
243 buf.elems[op ] = (byte)((x >> 8) & 0xFF);
244 buf.elems[op+1] = (byte)((x ) & 0xFF);
245 }
247 /** Write an integer into given byte buffer;
248 * byte buffer will not be grown.
249 */
250 void putInt(ByteBuffer buf, int adr, int x) {
251 buf.elems[adr ] = (byte)((x >> 24) & 0xFF);
252 buf.elems[adr+1] = (byte)((x >> 16) & 0xFF);
253 buf.elems[adr+2] = (byte)((x >> 8) & 0xFF);
254 buf.elems[adr+3] = (byte)((x ) & 0xFF);
255 }
257 /******************************************************************
258 * Signature Generation
259 ******************************************************************/
261 /** Assemble signature of given type in string buffer.
262 */
263 void assembleSig(Type type) {
264 switch (type.tag) {
265 case BYTE:
266 sigbuf.appendByte('B');
267 break;
268 case SHORT:
269 sigbuf.appendByte('S');
270 break;
271 case CHAR:
272 sigbuf.appendByte('C');
273 break;
274 case INT:
275 sigbuf.appendByte('I');
276 break;
277 case LONG:
278 sigbuf.appendByte('J');
279 break;
280 case FLOAT:
281 sigbuf.appendByte('F');
282 break;
283 case DOUBLE:
284 sigbuf.appendByte('D');
285 break;
286 case BOOLEAN:
287 sigbuf.appendByte('Z');
288 break;
289 case VOID:
290 sigbuf.appendByte('V');
291 break;
292 case CLASS:
293 sigbuf.appendByte('L');
294 assembleClassSig(type);
295 sigbuf.appendByte(';');
296 break;
297 case ARRAY:
298 ArrayType at = (ArrayType)type;
299 sigbuf.appendByte('[');
300 assembleSig(at.elemtype);
301 break;
302 case METHOD:
303 MethodType mt = (MethodType)type;
304 sigbuf.appendByte('(');
305 assembleSig(mt.argtypes);
306 sigbuf.appendByte(')');
307 assembleSig(mt.restype);
308 if (hasTypeVar(mt.thrown)) {
309 for (List<Type> l = mt.thrown; l.nonEmpty(); l = l.tail) {
310 sigbuf.appendByte('^');
311 assembleSig(l.head);
312 }
313 }
314 break;
315 case WILDCARD: {
316 WildcardType ta = (WildcardType) type;
317 switch (ta.kind) {
318 case SUPER:
319 sigbuf.appendByte('-');
320 assembleSig(ta.type);
321 break;
322 case EXTENDS:
323 sigbuf.appendByte('+');
324 assembleSig(ta.type);
325 break;
326 case UNBOUND:
327 sigbuf.appendByte('*');
328 break;
329 default:
330 throw new AssertionError(ta.kind);
331 }
332 break;
333 }
334 case TYPEVAR:
335 sigbuf.appendByte('T');
336 sigbuf.appendName(type.tsym.name);
337 sigbuf.appendByte(';');
338 break;
339 case FORALL:
340 ForAll ft = (ForAll)type;
341 assembleParamsSig(ft.tvars);
342 assembleSig(ft.qtype);
343 break;
344 case UNINITIALIZED_THIS:
345 case UNINITIALIZED_OBJECT:
346 // we don't yet have a spec for uninitialized types in the
347 // local variable table
348 assembleSig(types.erasure(((UninitializedType)type).qtype));
349 break;
350 default:
351 throw new AssertionError("typeSig " + type.tag);
352 }
353 }
355 boolean hasTypeVar(List<Type> l) {
356 while (l.nonEmpty()) {
357 if (l.head.tag == TypeTags.TYPEVAR) return true;
358 l = l.tail;
359 }
360 return false;
361 }
363 void assembleClassSig(Type type) {
364 ClassType ct = (ClassType)type;
365 ClassSymbol c = (ClassSymbol)ct.tsym;
366 enterInner(c);
367 Type outer = ct.getEnclosingType();
368 if (outer.allparams().nonEmpty()) {
369 boolean rawOuter =
370 c.owner.kind == MTH || // either a local class
371 c.name == names.empty; // or anonymous
372 assembleClassSig(rawOuter
373 ? types.erasure(outer)
374 : outer);
375 sigbuf.appendByte('.');
376 assert c.flatname.startsWith(c.owner.enclClass().flatname);
377 sigbuf.appendName(rawOuter
378 ? c.flatname.subName(c.owner.enclClass()
379 .flatname.len+1,
380 c.flatname.len)
381 : c.name);
382 } else {
383 sigbuf.appendBytes(externalize(c.flatname));
384 }
385 if (ct.getTypeArguments().nonEmpty()) {
386 sigbuf.appendByte('<');
387 assembleSig(ct.getTypeArguments());
388 sigbuf.appendByte('>');
389 }
390 }
393 void assembleSig(List<Type> types) {
394 for (List<Type> ts = types; ts.nonEmpty(); ts = ts.tail)
395 assembleSig(ts.head);
396 }
398 void assembleParamsSig(List<Type> typarams) {
399 sigbuf.appendByte('<');
400 for (List<Type> ts = typarams; ts.nonEmpty(); ts = ts.tail) {
401 TypeVar tvar = (TypeVar)ts.head;
402 sigbuf.appendName(tvar.tsym.name);
403 List<Type> bounds = types.getBounds(tvar);
404 if ((bounds.head.tsym.flags() & INTERFACE) != 0) {
405 sigbuf.appendByte(':');
406 }
407 for (List<Type> l = bounds; l.nonEmpty(); l = l.tail) {
408 sigbuf.appendByte(':');
409 assembleSig(l.head);
410 }
411 }
412 sigbuf.appendByte('>');
413 }
415 /** Return signature of given type
416 */
417 Name typeSig(Type type) {
418 assert sigbuf.length == 0;
419 //- System.out.println(" ? " + type);
420 assembleSig(type);
421 Name n = sigbuf.toName(names);
422 sigbuf.reset();
423 //- System.out.println(" " + n);
424 return n;
425 }
427 /** Given a type t, return the extended class name of its erasure in
428 * external representation.
429 */
430 public Name xClassName(Type t) {
431 if (t.tag == CLASS) {
432 return names.fromUtf(externalize(t.tsym.flatName()));
433 } else if (t.tag == ARRAY) {
434 return typeSig(types.erasure(t));
435 } else {
436 throw new AssertionError("xClassName");
437 }
438 }
440 /******************************************************************
441 * Writing the Constant Pool
442 ******************************************************************/
444 /** Thrown when the constant pool is over full.
445 */
446 public static class PoolOverflow extends Exception {
447 private static final long serialVersionUID = 0;
448 public PoolOverflow() {}
449 }
450 public static class StringOverflow extends Exception {
451 private static final long serialVersionUID = 0;
452 public final String value;
453 public StringOverflow(String s) {
454 value = s;
455 }
456 }
458 /** Write constant pool to pool buffer.
459 * Note: during writing, constant pool
460 * might grow since some parts of constants still need to be entered.
461 */
462 void writePool(Pool pool) throws PoolOverflow, StringOverflow {
463 int poolCountIdx = poolbuf.length;
464 poolbuf.appendChar(0);
465 int i = 1;
466 while (i < pool.pp) {
467 Object value = pool.pool[i];
468 assert value != null;
469 if (value instanceof Pool.Method)
470 value = ((Pool.Method)value).m;
471 else if (value instanceof Pool.Variable)
472 value = ((Pool.Variable)value).v;
474 if (value instanceof MethodSymbol) {
475 MethodSymbol m = (MethodSymbol)value;
476 poolbuf.appendByte((m.owner.flags() & INTERFACE) != 0
477 ? CONSTANT_InterfaceMethodref
478 : CONSTANT_Methodref);
479 poolbuf.appendChar(pool.put(m.owner));
480 poolbuf.appendChar(pool.put(nameType(m)));
481 } else if (value instanceof VarSymbol) {
482 VarSymbol v = (VarSymbol)value;
483 poolbuf.appendByte(CONSTANT_Fieldref);
484 poolbuf.appendChar(pool.put(v.owner));
485 poolbuf.appendChar(pool.put(nameType(v)));
486 } else if (value instanceof Name) {
487 poolbuf.appendByte(CONSTANT_Utf8);
488 byte[] bs = ((Name)value).toUtf();
489 poolbuf.appendChar(bs.length);
490 poolbuf.appendBytes(bs, 0, bs.length);
491 if (bs.length > Pool.MAX_STRING_LENGTH)
492 throw new StringOverflow(value.toString());
493 } else if (value instanceof ClassSymbol) {
494 ClassSymbol c = (ClassSymbol)value;
495 if (c.owner.kind == TYP) pool.put(c.owner);
496 poolbuf.appendByte(CONSTANT_Class);
497 if (c.type.tag == ARRAY) {
498 poolbuf.appendChar(pool.put(typeSig(c.type)));
499 } else {
500 poolbuf.appendChar(pool.put(names.fromUtf(externalize(c.flatname))));
501 enterInner(c);
502 }
503 } else if (value instanceof NameAndType) {
504 NameAndType nt = (NameAndType)value;
505 poolbuf.appendByte(CONSTANT_NameandType);
506 poolbuf.appendChar(pool.put(nt.name));
507 poolbuf.appendChar(pool.put(typeSig(nt.type)));
508 } else if (value instanceof Integer) {
509 poolbuf.appendByte(CONSTANT_Integer);
510 poolbuf.appendInt(((Integer)value).intValue());
511 } else if (value instanceof Long) {
512 poolbuf.appendByte(CONSTANT_Long);
513 poolbuf.appendLong(((Long)value).longValue());
514 i++;
515 } else if (value instanceof Float) {
516 poolbuf.appendByte(CONSTANT_Float);
517 poolbuf.appendFloat(((Float)value).floatValue());
518 } else if (value instanceof Double) {
519 poolbuf.appendByte(CONSTANT_Double);
520 poolbuf.appendDouble(((Double)value).doubleValue());
521 i++;
522 } else if (value instanceof String) {
523 poolbuf.appendByte(CONSTANT_String);
524 poolbuf.appendChar(pool.put(names.fromString((String)value)));
525 } else if (value instanceof Type) {
526 Type type = (Type)value;
527 if (type.tag == CLASS) enterInner((ClassSymbol)type.tsym);
528 poolbuf.appendByte(CONSTANT_Class);
529 poolbuf.appendChar(pool.put(xClassName(type)));
530 } else {
531 assert false : "writePool " + value;
532 }
533 i++;
534 }
535 if (pool.pp > Pool.MAX_ENTRIES)
536 throw new PoolOverflow();
537 putChar(poolbuf, poolCountIdx, pool.pp);
538 }
540 /** Given a field, return its name.
541 */
542 Name fieldName(Symbol sym) {
543 if (scramble && (sym.flags() & PRIVATE) != 0 ||
544 scrambleAll && (sym.flags() & (PROTECTED | PUBLIC)) == 0)
545 return names.fromString("_$" + sym.name.index);
546 else
547 return sym.name;
548 }
550 /** Given a symbol, return its name-and-type.
551 */
552 NameAndType nameType(Symbol sym) {
553 return new NameAndType(fieldName(sym),
554 retrofit
555 ? sym.erasure(types)
556 : sym.externalType(types));
557 // if we retrofit, then the NameAndType has been read in as is
558 // and no change is necessary. If we compile normally, the
559 // NameAndType is generated from a symbol reference, and the
560 // adjustment of adding an additional this$n parameter needs to be made.
561 }
563 /******************************************************************
564 * Writing Attributes
565 ******************************************************************/
567 /** Write header for an attribute to data buffer and return
568 * position past attribute length index.
569 */
570 int writeAttr(Name attrName) {
571 databuf.appendChar(pool.put(attrName));
572 databuf.appendInt(0);
573 return databuf.length;
574 }
576 /** Fill in attribute length.
577 */
578 void endAttr(int index) {
579 putInt(databuf, index - 4, databuf.length - index);
580 }
582 /** Leave space for attribute count and return index for
583 * number of attributes field.
584 */
585 int beginAttrs() {
586 databuf.appendChar(0);
587 return databuf.length;
588 }
590 /** Fill in number of attributes.
591 */
592 void endAttrs(int index, int count) {
593 putChar(databuf, index - 2, count);
594 }
596 /** Write the EnclosingMethod attribute if needed.
597 * Returns the number of attributes written (0 or 1).
598 */
599 int writeEnclosingMethodAttribute(ClassSymbol c) {
600 if (!target.hasEnclosingMethodAttribute() ||
601 c.owner.kind != MTH && // neither a local class
602 c.name != names.empty) // nor anonymous
603 return 0;
605 int alenIdx = writeAttr(names.EnclosingMethod);
606 ClassSymbol enclClass = c.owner.enclClass();
607 MethodSymbol enclMethod =
608 (c.owner.type == null // local to init block
609 || c.owner.kind != MTH) // or member init
610 ? null
611 : (MethodSymbol)c.owner;
612 databuf.appendChar(pool.put(enclClass));
613 databuf.appendChar(enclMethod == null ? 0 : pool.put(nameType(c.owner)));
614 endAttr(alenIdx);
615 return 1;
616 }
618 /** Write flag attributes; return number of attributes written.
619 */
620 int writeFlagAttrs(long flags) {
621 int acount = 0;
622 if ((flags & DEPRECATED) != 0) {
623 int alenIdx = writeAttr(names.Deprecated);
624 endAttr(alenIdx);
625 acount++;
626 }
627 if ((flags & ENUM) != 0 && !target.useEnumFlag()) {
628 int alenIdx = writeAttr(names.Enum);
629 endAttr(alenIdx);
630 acount++;
631 }
632 if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag()) {
633 int alenIdx = writeAttr(names.Synthetic);
634 endAttr(alenIdx);
635 acount++;
636 }
637 if ((flags & BRIDGE) != 0 && !target.useBridgeFlag()) {
638 int alenIdx = writeAttr(names.Bridge);
639 endAttr(alenIdx);
640 acount++;
641 }
642 if ((flags & VARARGS) != 0 && !target.useVarargsFlag()) {
643 int alenIdx = writeAttr(names.Varargs);
644 endAttr(alenIdx);
645 acount++;
646 }
647 if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag()) {
648 int alenIdx = writeAttr(names.Annotation);
649 endAttr(alenIdx);
650 acount++;
651 }
652 return acount;
653 }
655 /** Write member (field or method) attributes;
656 * return number of attributes written.
657 */
658 int writeMemberAttrs(Symbol sym) {
659 int acount = writeFlagAttrs(sym.flags());
660 long flags = sym.flags();
661 if (source.allowGenerics() &&
662 (flags & (SYNTHETIC|BRIDGE)) != SYNTHETIC &&
663 (flags & ANONCONSTR) == 0 &&
664 (!types.isSameType(sym.type, sym.erasure(types)) ||
665 hasTypeVar(sym.type.getThrownTypes()))) {
666 // note that a local class with captured variables
667 // will get a signature attribute
668 int alenIdx = writeAttr(names.Signature);
669 databuf.appendChar(pool.put(typeSig(sym.type)));
670 endAttr(alenIdx);
671 acount++;
672 }
673 acount += writeJavaAnnotations(sym.getAnnotationMirrors());
674 return acount;
675 }
677 /** Write method parameter annotations;
678 * return number of attributes written.
679 */
680 int writeParameterAttrs(MethodSymbol m) {
681 boolean hasVisible = false;
682 boolean hasInvisible = false;
683 if (m.params != null) for (VarSymbol s : m.params) {
684 for (Attribute.Compound a : s.getAnnotationMirrors()) {
685 switch (getRetention(a.type.tsym)) {
686 case SOURCE: break;
687 case CLASS: hasInvisible = true; break;
688 case RUNTIME: hasVisible = true; break;
689 default: ;// /* fail soft */ throw new AssertionError(vis);
690 }
691 }
692 }
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.getAnnotationMirrors())
701 if (getRetention(a.type.tsym) == 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.getAnnotationMirrors())
716 if (getRetention(a.type.tsym) == 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 }
728 /**********************************************************************
729 * Writing Java-language annotations (aka metadata, attributes)
730 **********************************************************************/
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 (getRetention(a.type.tsym)) {
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 }
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 }
768 /** A mirror of java.lang.annotation.RetentionPolicy. */
769 enum RetentionPolicy {
770 SOURCE,
771 CLASS,
772 RUNTIME
773 }
775 RetentionPolicy getRetention(TypeSymbol annotationType) {
776 RetentionPolicy vis = RetentionPolicy.CLASS; // the default
777 Attribute.Compound c = annotationType.attribute(syms.retentionType.tsym);
778 if (c != null) {
779 Attribute value = c.member(names.value);
780 if (value != null && value instanceof Attribute.Enum) {
781 Name levelName = ((Attribute.Enum)value).value.name;
782 if (levelName == names.SOURCE) vis = RetentionPolicy.SOURCE;
783 else if (levelName == names.CLASS) vis = RetentionPolicy.CLASS;
784 else if (levelName == names.RUNTIME) vis = RetentionPolicy.RUNTIME;
785 else ;// /* fail soft */ throw new AssertionError(levelName);
786 }
787 }
788 return vis;
789 }
791 /** A visitor to write an attribute including its leading
792 * single-character marker.
793 */
794 class AttributeWriter implements Attribute.Visitor {
795 public void visitConstant(Attribute.Constant _value) {
796 Object value = _value.value;
797 switch (_value.type.tag) {
798 case BYTE:
799 databuf.appendByte('B');
800 break;
801 case CHAR:
802 databuf.appendByte('C');
803 break;
804 case SHORT:
805 databuf.appendByte('S');
806 break;
807 case INT:
808 databuf.appendByte('I');
809 break;
810 case LONG:
811 databuf.appendByte('J');
812 break;
813 case FLOAT:
814 databuf.appendByte('F');
815 break;
816 case DOUBLE:
817 databuf.appendByte('D');
818 break;
819 case BOOLEAN:
820 databuf.appendByte('Z');
821 break;
822 case CLASS:
823 assert value instanceof String;
824 databuf.appendByte('s');
825 value = names.fromString(value.toString()); // CONSTANT_Utf8
826 break;
827 default:
828 throw new AssertionError(_value.type);
829 }
830 databuf.appendChar(pool.put(value));
831 }
832 public void visitEnum(Attribute.Enum e) {
833 databuf.appendByte('e');
834 databuf.appendChar(pool.put(typeSig(e.value.type)));
835 databuf.appendChar(pool.put(e.value.name));
836 }
837 public void visitClass(Attribute.Class clazz) {
838 databuf.appendByte('c');
839 databuf.appendChar(pool.put(typeSig(clazz.type)));
840 }
841 public void visitCompound(Attribute.Compound compound) {
842 databuf.appendByte('@');
843 writeCompoundAttribute(compound);
844 }
845 public void visitError(Attribute.Error x) {
846 throw new AssertionError(x);
847 }
848 public void visitArray(Attribute.Array array) {
849 databuf.appendByte('[');
850 databuf.appendChar(array.values.length);
851 for (Attribute a : array.values) {
852 a.accept(this);
853 }
854 }
855 }
856 AttributeWriter awriter = new AttributeWriter();
858 /** Write a compound attribute excluding the '@' marker. */
859 void writeCompoundAttribute(Attribute.Compound c) {
860 databuf.appendChar(pool.put(typeSig(c.type)));
861 databuf.appendChar(c.values.length());
862 for (Pair<Symbol.MethodSymbol,Attribute> p : c.values) {
863 databuf.appendChar(pool.put(p.fst.name));
864 p.snd.accept(awriter);
865 }
866 }
868 /**********************************************************************
869 * Writing Objects
870 **********************************************************************/
872 /** Enter an inner class into the `innerClasses' set/queue.
873 */
874 void enterInner(ClassSymbol c) {
875 assert !c.type.isCompound();
876 try {
877 c.complete();
878 } catch (CompletionFailure ex) {
879 System.err.println("error: " + c + ": " + ex.getMessage());
880 throw ex;
881 }
882 if (c.type.tag != CLASS) return; // arrays
883 if (pool != null && // pool might be null if called from xClassName
884 c.owner.kind != PCK &&
885 (innerClasses == null || !innerClasses.contains(c))) {
886 // log.errWriter.println("enter inner " + c);//DEBUG
887 if (c.owner.kind == TYP) enterInner((ClassSymbol)c.owner);
888 pool.put(c);
889 pool.put(c.name);
890 if (innerClasses == null) {
891 innerClasses = new HashSet<ClassSymbol>();
892 innerClassesQueue = new ListBuffer<ClassSymbol>();
893 pool.put(names.InnerClasses);
894 }
895 innerClasses.add(c);
896 innerClassesQueue.append(c);
897 }
898 }
900 /** Write "inner classes" attribute.
901 */
902 void writeInnerClasses() {
903 int alenIdx = writeAttr(names.InnerClasses);
904 databuf.appendChar(innerClassesQueue.length());
905 for (List<ClassSymbol> l = innerClassesQueue.toList();
906 l.nonEmpty();
907 l = l.tail) {
908 ClassSymbol inner = l.head;
909 char flags = (char) adjustFlags(inner.flags_field);
910 if ((flags & INTERFACE) != 0) flags |= ABSTRACT; // Interfaces are always ABSTRACT
911 if (inner.name.isEmpty()) flags &= ~FINAL; // Anonymous class: unset FINAL flag
912 if (dumpInnerClassModifiers) {
913 log.errWriter.println("INNERCLASS " + inner.name);
914 log.errWriter.println("---" + flagNames(flags));
915 }
916 databuf.appendChar(pool.get(inner));
917 databuf.appendChar(
918 inner.owner.kind == TYP ? pool.get(inner.owner) : 0);
919 databuf.appendChar(
920 inner.name.len != 0 ? pool.get(inner.name) : 0);
921 databuf.appendChar(flags);
922 }
923 endAttr(alenIdx);
924 }
926 /** Write field symbol, entering all references into constant pool.
927 */
928 void writeField(VarSymbol v) {
929 int flags = adjustFlags(v.flags());
930 databuf.appendChar(flags);
931 if (dumpFieldModifiers) {
932 log.errWriter.println("FIELD " + fieldName(v));
933 log.errWriter.println("---" + flagNames(v.flags()));
934 }
935 databuf.appendChar(pool.put(fieldName(v)));
936 databuf.appendChar(pool.put(typeSig(v.erasure(types))));
937 int acountIdx = beginAttrs();
938 int acount = 0;
939 if (v.getConstValue() != null) {
940 int alenIdx = writeAttr(names.ConstantValue);
941 databuf.appendChar(pool.put(v.getConstValue()));
942 endAttr(alenIdx);
943 acount++;
944 }
945 acount += writeMemberAttrs(v);
946 endAttrs(acountIdx, acount);
947 }
949 /** Write method symbol, entering all references into constant pool.
950 */
951 void writeMethod(MethodSymbol m) {
952 int flags = adjustFlags(m.flags());
953 databuf.appendChar(flags);
954 if (dumpMethodModifiers) {
955 log.errWriter.println("METHOD " + fieldName(m));
956 log.errWriter.println("---" + flagNames(m.flags()));
957 }
958 databuf.appendChar(pool.put(fieldName(m)));
959 databuf.appendChar(pool.put(typeSig(m.externalType(types))));
960 int acountIdx = beginAttrs();
961 int acount = 0;
962 if (m.code != null) {
963 int alenIdx = writeAttr(names.Code);
964 writeCode(m.code);
965 m.code = null; // to conserve space
966 endAttr(alenIdx);
967 acount++;
968 }
969 List<Type> thrown = m.erasure(types).getThrownTypes();
970 if (thrown.nonEmpty()) {
971 int alenIdx = writeAttr(names.Exceptions);
972 databuf.appendChar(thrown.length());
973 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail)
974 databuf.appendChar(pool.put(l.head.tsym));
975 endAttr(alenIdx);
976 acount++;
977 }
978 if (m.defaultValue != null) {
979 int alenIdx = writeAttr(names.AnnotationDefault);
980 m.defaultValue.accept(awriter);
981 endAttr(alenIdx);
982 acount++;
983 }
984 acount += writeMemberAttrs(m);
985 acount += writeParameterAttrs(m);
986 endAttrs(acountIdx, acount);
987 }
989 /** Write code attribute of method.
990 */
991 void writeCode(Code code) {
992 databuf.appendChar(code.max_stack);
993 databuf.appendChar(code.max_locals);
994 databuf.appendInt(code.cp);
995 databuf.appendBytes(code.code, 0, code.cp);
996 databuf.appendChar(code.catchInfo.length());
997 for (List<char[]> l = code.catchInfo.toList();
998 l.nonEmpty();
999 l = l.tail) {
1000 for (int i = 0; i < l.head.length; i++)
1001 databuf.appendChar(l.head[i]);
1002 }
1003 int acountIdx = beginAttrs();
1004 int acount = 0;
1006 if (code.lineInfo.nonEmpty()) {
1007 int alenIdx = writeAttr(names.LineNumberTable);
1008 databuf.appendChar(code.lineInfo.length());
1009 for (List<char[]> l = code.lineInfo.reverse();
1010 l.nonEmpty();
1011 l = l.tail)
1012 for (int i = 0; i < l.head.length; i++)
1013 databuf.appendChar(l.head[i]);
1014 endAttr(alenIdx);
1015 acount++;
1016 }
1018 if (genCrt && (code.crt != null)) {
1019 CRTable crt = code.crt;
1020 int alenIdx = writeAttr(names.CharacterRangeTable);
1021 int crtIdx = beginAttrs();
1022 int crtEntries = crt.writeCRT(databuf, code.lineMap, log);
1023 endAttrs(crtIdx, crtEntries);
1024 endAttr(alenIdx);
1025 acount++;
1026 }
1028 // counter for number of generic local variables
1029 int nGenericVars = 0;
1031 if (code.varBufferSize > 0) {
1032 int alenIdx = writeAttr(names.LocalVariableTable);
1033 databuf.appendChar(code.varBufferSize);
1035 for (int i=0; i<code.varBufferSize; i++) {
1036 Code.LocalVar var = code.varBuffer[i];
1038 // write variable info
1039 assert var.start_pc >= 0;
1040 assert var.start_pc <= code.cp;
1041 databuf.appendChar(var.start_pc);
1042 assert var.length >= 0;
1043 assert (var.start_pc + var.length) <= code.cp;
1044 databuf.appendChar(var.length);
1045 VarSymbol sym = var.sym;
1046 databuf.appendChar(pool.put(sym.name));
1047 Type vartype = sym.erasure(types);
1048 if (!types.isSameType(sym.type, vartype))
1049 nGenericVars++;
1050 databuf.appendChar(pool.put(typeSig(vartype)));
1051 databuf.appendChar(var.reg);
1052 }
1053 endAttr(alenIdx);
1054 acount++;
1055 }
1057 if (nGenericVars > 0) {
1058 int alenIdx = writeAttr(names.LocalVariableTypeTable);
1059 databuf.appendChar(nGenericVars);
1060 int count = 0;
1062 for (int i=0; i<code.varBufferSize; i++) {
1063 Code.LocalVar var = code.varBuffer[i];
1064 VarSymbol sym = var.sym;
1065 if (types.isSameType(sym.type, sym.erasure(types)))
1066 continue;
1067 count++;
1068 // write variable info
1069 databuf.appendChar(var.start_pc);
1070 databuf.appendChar(var.length);
1071 databuf.appendChar(pool.put(sym.name));
1072 databuf.appendChar(pool.put(typeSig(sym.type)));
1073 databuf.appendChar(var.reg);
1074 }
1075 assert count == nGenericVars;
1076 endAttr(alenIdx);
1077 acount++;
1078 }
1080 if (code.stackMapBufferSize > 0) {
1081 if (debugstackmap) System.out.println("Stack map for " + code.meth);
1082 int alenIdx = writeAttr(code.stackMap.getAttributeName(names));
1083 writeStackMap(code);
1084 endAttr(alenIdx);
1085 acount++;
1086 }
1087 endAttrs(acountIdx, acount);
1088 }
1090 void writeStackMap(Code code) {
1091 int nframes = code.stackMapBufferSize;
1092 if (debugstackmap) System.out.println(" nframes = " + nframes);
1093 databuf.appendChar(nframes);
1095 switch (code.stackMap) {
1096 case CLDC:
1097 for (int i=0; i<nframes; i++) {
1098 if (debugstackmap) System.out.print(" " + i + ":");
1099 Code.StackMapFrame frame = code.stackMapBuffer[i];
1101 // output PC
1102 if (debugstackmap) System.out.print(" pc=" + frame.pc);
1103 databuf.appendChar(frame.pc);
1105 // output locals
1106 int localCount = 0;
1107 for (int j=0; j<frame.locals.length;
1108 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
1109 localCount++;
1110 }
1111 if (debugstackmap) System.out.print(" nlocals=" +
1112 localCount);
1113 databuf.appendChar(localCount);
1114 for (int j=0; j<frame.locals.length;
1115 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
1116 if (debugstackmap) System.out.print(" local[" + j + "]=");
1117 writeStackMapType(frame.locals[j]);
1118 }
1120 // output stack
1121 int stackCount = 0;
1122 for (int j=0; j<frame.stack.length;
1123 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
1124 stackCount++;
1125 }
1126 if (debugstackmap) System.out.print(" nstack=" +
1127 stackCount);
1128 databuf.appendChar(stackCount);
1129 for (int j=0; j<frame.stack.length;
1130 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
1131 if (debugstackmap) System.out.print(" stack[" + j + "]=");
1132 writeStackMapType(frame.stack[j]);
1133 }
1134 if (debugstackmap) System.out.println();
1135 }
1136 break;
1137 case JSR202: {
1138 assert code.stackMapBuffer == null;
1139 for (int i=0; i<nframes; i++) {
1140 if (debugstackmap) System.out.print(" " + i + ":");
1141 StackMapTableFrame frame = code.stackMapTableBuffer[i];
1142 frame.write(this);
1143 if (debugstackmap) System.out.println();
1144 }
1145 break;
1146 }
1147 default:
1148 throw new AssertionError("Unexpected stackmap format value");
1149 }
1150 }
1152 //where
1153 void writeStackMapType(Type t) {
1154 if (t == null) {
1155 if (debugstackmap) System.out.print("empty");
1156 databuf.appendByte(0);
1157 }
1158 else switch(t.tag) {
1159 case BYTE:
1160 case CHAR:
1161 case SHORT:
1162 case INT:
1163 case BOOLEAN:
1164 if (debugstackmap) System.out.print("int");
1165 databuf.appendByte(1);
1166 break;
1167 case FLOAT:
1168 if (debugstackmap) System.out.print("float");
1169 databuf.appendByte(2);
1170 break;
1171 case DOUBLE:
1172 if (debugstackmap) System.out.print("double");
1173 databuf.appendByte(3);
1174 break;
1175 case LONG:
1176 if (debugstackmap) System.out.print("long");
1177 databuf.appendByte(4);
1178 break;
1179 case BOT: // null
1180 if (debugstackmap) System.out.print("null");
1181 databuf.appendByte(5);
1182 break;
1183 case CLASS:
1184 case ARRAY:
1185 if (debugstackmap) System.out.print("object(" + t + ")");
1186 databuf.appendByte(7);
1187 databuf.appendChar(pool.put(t));
1188 break;
1189 case TYPEVAR:
1190 if (debugstackmap) System.out.print("object(" + types.erasure(t).tsym + ")");
1191 databuf.appendByte(7);
1192 databuf.appendChar(pool.put(types.erasure(t).tsym));
1193 break;
1194 case UNINITIALIZED_THIS:
1195 if (debugstackmap) System.out.print("uninit_this");
1196 databuf.appendByte(6);
1197 break;
1198 case UNINITIALIZED_OBJECT:
1199 { UninitializedType uninitType = (UninitializedType)t;
1200 databuf.appendByte(8);
1201 if (debugstackmap) System.out.print("uninit_object@" + uninitType.offset);
1202 databuf.appendChar(uninitType.offset);
1203 }
1204 break;
1205 default:
1206 throw new AssertionError();
1207 }
1208 }
1210 /** An entry in the JSR202 StackMapTable */
1211 abstract static class StackMapTableFrame {
1212 abstract int getFrameType();
1214 void write(ClassWriter writer) {
1215 int frameType = getFrameType();
1216 writer.databuf.appendByte(frameType);
1217 if (writer.debugstackmap) System.out.print(" frame_type=" + frameType);
1218 }
1220 static class SameFrame extends StackMapTableFrame {
1221 final int offsetDelta;
1222 SameFrame(int offsetDelta) {
1223 this.offsetDelta = offsetDelta;
1224 }
1225 int getFrameType() {
1226 return (offsetDelta < SAME_FRAME_SIZE) ? offsetDelta : SAME_FRAME_EXTENDED;
1227 }
1228 @Override
1229 void write(ClassWriter writer) {
1230 super.write(writer);
1231 if (getFrameType() == SAME_FRAME_EXTENDED) {
1232 writer.databuf.appendChar(offsetDelta);
1233 if (writer.debugstackmap){
1234 System.out.print(" offset_delta=" + offsetDelta);
1235 }
1236 }
1237 }
1238 }
1240 static class SameLocals1StackItemFrame extends StackMapTableFrame {
1241 final int offsetDelta;
1242 final Type stack;
1243 SameLocals1StackItemFrame(int offsetDelta, Type stack) {
1244 this.offsetDelta = offsetDelta;
1245 this.stack = stack;
1246 }
1247 int getFrameType() {
1248 return (offsetDelta < SAME_FRAME_SIZE) ?
1249 (SAME_FRAME_SIZE + offsetDelta) :
1250 SAME_LOCALS_1_STACK_ITEM_EXTENDED;
1251 }
1252 @Override
1253 void write(ClassWriter writer) {
1254 super.write(writer);
1255 if (getFrameType() == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
1256 writer.databuf.appendChar(offsetDelta);
1257 if (writer.debugstackmap) {
1258 System.out.print(" offset_delta=" + offsetDelta);
1259 }
1260 }
1261 if (writer.debugstackmap) {
1262 System.out.print(" stack[" + 0 + "]=");
1263 }
1264 writer.writeStackMapType(stack);
1265 }
1266 }
1268 static class ChopFrame extends StackMapTableFrame {
1269 final int frameType;
1270 final int offsetDelta;
1271 ChopFrame(int frameType, int offsetDelta) {
1272 this.frameType = frameType;
1273 this.offsetDelta = offsetDelta;
1274 }
1275 int getFrameType() { return frameType; }
1276 @Override
1277 void write(ClassWriter writer) {
1278 super.write(writer);
1279 writer.databuf.appendChar(offsetDelta);
1280 if (writer.debugstackmap) {
1281 System.out.print(" offset_delta=" + offsetDelta);
1282 }
1283 }
1284 }
1286 static class AppendFrame extends StackMapTableFrame {
1287 final int frameType;
1288 final int offsetDelta;
1289 final Type[] locals;
1290 AppendFrame(int frameType, int offsetDelta, Type[] locals) {
1291 this.frameType = frameType;
1292 this.offsetDelta = offsetDelta;
1293 this.locals = locals;
1294 }
1295 int getFrameType() { return frameType; }
1296 @Override
1297 void write(ClassWriter writer) {
1298 super.write(writer);
1299 writer.databuf.appendChar(offsetDelta);
1300 if (writer.debugstackmap) {
1301 System.out.print(" offset_delta=" + offsetDelta);
1302 }
1303 for (int i=0; i<locals.length; i++) {
1304 if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
1305 writer.writeStackMapType(locals[i]);
1306 }
1307 }
1308 }
1310 static class FullFrame extends StackMapTableFrame {
1311 final int offsetDelta;
1312 final Type[] locals;
1313 final Type[] stack;
1314 FullFrame(int offsetDelta, Type[] locals, Type[] stack) {
1315 this.offsetDelta = offsetDelta;
1316 this.locals = locals;
1317 this.stack = stack;
1318 }
1319 int getFrameType() { return FULL_FRAME; }
1320 @Override
1321 void write(ClassWriter writer) {
1322 super.write(writer);
1323 writer.databuf.appendChar(offsetDelta);
1324 writer.databuf.appendChar(locals.length);
1325 if (writer.debugstackmap) {
1326 System.out.print(" offset_delta=" + offsetDelta);
1327 System.out.print(" nlocals=" + locals.length);
1328 }
1329 for (int i=0; i<locals.length; i++) {
1330 if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
1331 writer.writeStackMapType(locals[i]);
1332 }
1334 writer.databuf.appendChar(stack.length);
1335 if (writer.debugstackmap) { System.out.print(" nstack=" + stack.length); }
1336 for (int i=0; i<stack.length; i++) {
1337 if (writer.debugstackmap) System.out.print(" stack[" + i + "]=");
1338 writer.writeStackMapType(stack[i]);
1339 }
1340 }
1341 }
1343 /** Compare this frame with the previous frame and produce
1344 * an entry of compressed stack map frame. */
1345 static StackMapTableFrame getInstance(Code.StackMapFrame this_frame,
1346 int prev_pc,
1347 Type[] prev_locals,
1348 Types types) {
1349 Type[] locals = this_frame.locals;
1350 Type[] stack = this_frame.stack;
1351 int offset_delta = this_frame.pc - prev_pc - 1;
1352 if (stack.length == 1) {
1353 if (locals.length == prev_locals.length
1354 && compare(prev_locals, locals, types) == 0) {
1355 return new SameLocals1StackItemFrame(offset_delta, stack[0]);
1356 }
1357 } else if (stack.length == 0) {
1358 int diff_length = compare(prev_locals, locals, types);
1359 if (diff_length == 0) {
1360 return new SameFrame(offset_delta);
1361 } else if (-MAX_LOCAL_LENGTH_DIFF < diff_length && diff_length < 0) {
1362 // APPEND
1363 Type[] local_diff = new Type[-diff_length];
1364 for (int i=prev_locals.length, j=0; i<locals.length; i++,j++) {
1365 local_diff[j] = locals[i];
1366 }
1367 return new AppendFrame(SAME_FRAME_EXTENDED - diff_length,
1368 offset_delta,
1369 local_diff);
1370 } else if (0 < diff_length && diff_length < MAX_LOCAL_LENGTH_DIFF) {
1371 // CHOP
1372 return new ChopFrame(SAME_FRAME_EXTENDED - diff_length,
1373 offset_delta);
1374 }
1375 }
1376 // FULL_FRAME
1377 return new FullFrame(offset_delta, locals, stack);
1378 }
1380 static boolean isInt(Type t) {
1381 return (t.tag < TypeTags.INT || t.tag == TypeTags.BOOLEAN);
1382 }
1384 static boolean isSameType(Type t1, Type t2, Types types) {
1385 if (t1 == null) { return t2 == null; }
1386 if (t2 == null) { return false; }
1388 if (isInt(t1) && isInt(t2)) { return true; }
1390 if (t1.tag == UNINITIALIZED_THIS) {
1391 return t2.tag == UNINITIALIZED_THIS;
1392 } else if (t1.tag == UNINITIALIZED_OBJECT) {
1393 if (t2.tag == UNINITIALIZED_OBJECT) {
1394 return ((UninitializedType)t1).offset == ((UninitializedType)t2).offset;
1395 } else {
1396 return false;
1397 }
1398 } else if (t2.tag == UNINITIALIZED_THIS || t2.tag == UNINITIALIZED_OBJECT) {
1399 return false;
1400 }
1402 return types.isSameType(t1, t2);
1403 }
1405 static int compare(Type[] arr1, Type[] arr2, Types types) {
1406 int diff_length = arr1.length - arr2.length;
1407 if (diff_length > MAX_LOCAL_LENGTH_DIFF || diff_length < -MAX_LOCAL_LENGTH_DIFF) {
1408 return Integer.MAX_VALUE;
1409 }
1410 int len = (diff_length > 0) ? arr2.length : arr1.length;
1411 for (int i=0; i<len; i++) {
1412 if (!isSameType(arr1[i], arr2[i], types)) {
1413 return Integer.MAX_VALUE;
1414 }
1415 }
1416 return diff_length;
1417 }
1418 }
1420 void writeFields(Scope.Entry e) {
1421 // process them in reverse sibling order;
1422 // i.e., process them in declaration order.
1423 List<VarSymbol> vars = List.nil();
1424 for (Scope.Entry i = e; i != null; i = i.sibling) {
1425 if (i.sym.kind == VAR) vars = vars.prepend((VarSymbol)i.sym);
1426 }
1427 while (vars.nonEmpty()) {
1428 writeField(vars.head);
1429 vars = vars.tail;
1430 }
1431 }
1433 void writeMethods(Scope.Entry e) {
1434 List<MethodSymbol> methods = List.nil();
1435 for (Scope.Entry i = e; i != null; i = i.sibling) {
1436 if (i.sym.kind == MTH && (i.sym.flags() & HYPOTHETICAL) == 0)
1437 methods = methods.prepend((MethodSymbol)i.sym);
1438 }
1439 while (methods.nonEmpty()) {
1440 writeMethod(methods.head);
1441 methods = methods.tail;
1442 }
1443 }
1445 /** Emit a class file for a given class.
1446 * @param c The class from which a class file is generated.
1447 */
1448 public JavaFileObject writeClass(ClassSymbol c)
1449 throws IOException, PoolOverflow, StringOverflow
1450 {
1451 JavaFileObject outFile
1452 = fileManager.getJavaFileForOutput(CLASS_OUTPUT,
1453 c.flatname.toString(),
1454 JavaFileObject.Kind.CLASS,
1455 c.sourcefile);
1456 OutputStream out = outFile.openOutputStream();
1457 try {
1458 writeClassFile(out, c);
1459 if (verbose)
1460 log.errWriter.println(log.getLocalizedString("verbose.wrote.file", outFile));
1461 out.close();
1462 out = null;
1463 } finally {
1464 if (out != null) {
1465 // if we are propogating an exception, delete the file
1466 out.close();
1467 outFile.delete();
1468 outFile = null;
1469 }
1470 }
1471 return outFile; // may be null if write failed
1472 }
1474 /** Write class `c' to outstream `out'.
1475 */
1476 public void writeClassFile(OutputStream out, ClassSymbol c)
1477 throws IOException, PoolOverflow, StringOverflow {
1478 assert (c.flags() & COMPOUND) == 0;
1479 databuf.reset();
1480 poolbuf.reset();
1481 sigbuf.reset();
1482 pool = c.pool;
1483 innerClasses = null;
1484 innerClassesQueue = null;
1486 Type supertype = types.supertype(c.type);
1487 List<Type> interfaces = types.interfaces(c.type);
1488 List<Type> typarams = c.type.getTypeArguments();
1490 int flags = adjustFlags(c.flags());
1491 if ((flags & PROTECTED) != 0) flags |= PUBLIC;
1492 flags = flags & ClassFlags & ~STRICTFP;
1493 if ((flags & INTERFACE) == 0) flags |= ACC_SUPER;
1494 if (c.isInner() && c.name.isEmpty()) flags &= ~FINAL;
1495 if (dumpClassModifiers) {
1496 log.errWriter.println();
1497 log.errWriter.println("CLASSFILE " + c.getQualifiedName());
1498 log.errWriter.println("---" + flagNames(flags));
1499 }
1500 databuf.appendChar(flags);
1502 databuf.appendChar(pool.put(c));
1503 databuf.appendChar(supertype.tag == CLASS ? pool.put(supertype.tsym) : 0);
1504 databuf.appendChar(interfaces.length());
1505 for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
1506 databuf.appendChar(pool.put(l.head.tsym));
1507 int fieldsCount = 0;
1508 int methodsCount = 0;
1509 for (Scope.Entry e = c.members().elems; e != null; e = e.sibling) {
1510 switch (e.sym.kind) {
1511 case VAR: fieldsCount++; break;
1512 case MTH: if ((e.sym.flags() & HYPOTHETICAL) == 0) methodsCount++;
1513 break;
1514 case TYP: enterInner((ClassSymbol)e.sym); break;
1515 default : assert false;
1516 }
1517 }
1518 databuf.appendChar(fieldsCount);
1519 writeFields(c.members().elems);
1520 databuf.appendChar(methodsCount);
1521 writeMethods(c.members().elems);
1523 int acountIdx = beginAttrs();
1524 int acount = 0;
1526 boolean sigReq =
1527 typarams.length() != 0 || supertype.getTypeArguments().length() != 0;
1528 for (List<Type> l = interfaces; !sigReq && l.nonEmpty(); l = l.tail)
1529 sigReq = l.head.getTypeArguments().length() != 0;
1530 if (sigReq) {
1531 assert source.allowGenerics();
1532 int alenIdx = writeAttr(names.Signature);
1533 if (typarams.length() != 0) assembleParamsSig(typarams);
1534 assembleSig(supertype);
1535 for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
1536 assembleSig(l.head);
1537 databuf.appendChar(pool.put(sigbuf.toName(names)));
1538 sigbuf.reset();
1539 endAttr(alenIdx);
1540 acount++;
1541 }
1543 if (c.sourcefile != null && emitSourceFile) {
1544 int alenIdx = writeAttr(names.SourceFile);
1545 // WHM 6/29/1999: Strip file path prefix. We do it here at
1546 // the last possible moment because the sourcefile may be used
1547 // elsewhere in error diagnostics. Fixes 4241573.
1548 //databuf.appendChar(c.pool.put(c.sourcefile));
1549 String filename = c.sourcefile.toString();
1550 int sepIdx = filename.lastIndexOf(File.separatorChar);
1551 // Allow '/' as separator on all platforms, e.g., on Win32.
1552 int slashIdx = filename.lastIndexOf('/');
1553 if (slashIdx > sepIdx) sepIdx = slashIdx;
1554 if (sepIdx >= 0) filename = filename.substring(sepIdx + 1);
1555 databuf.appendChar(c.pool.put(names.fromString(filename)));
1556 endAttr(alenIdx);
1557 acount++;
1558 }
1560 if (genCrt) {
1561 // Append SourceID attribute
1562 int alenIdx = writeAttr(names.SourceID);
1563 databuf.appendChar(c.pool.put(names.fromString(Long.toString(getLastModified(c.sourcefile)))));
1564 endAttr(alenIdx);
1565 acount++;
1566 // Append CompilationID attribute
1567 alenIdx = writeAttr(names.CompilationID);
1568 databuf.appendChar(c.pool.put(names.fromString(Long.toString(System.currentTimeMillis()))));
1569 endAttr(alenIdx);
1570 acount++;
1571 }
1573 acount += writeFlagAttrs(c.flags());
1574 acount += writeJavaAnnotations(c.getAnnotationMirrors());
1575 acount += writeEnclosingMethodAttribute(c);
1577 poolbuf.appendInt(JAVA_MAGIC);
1578 poolbuf.appendChar(target.minorVersion);
1579 poolbuf.appendChar(target.majorVersion);
1581 writePool(c.pool);
1583 if (innerClasses != null) {
1584 writeInnerClasses();
1585 acount++;
1586 }
1587 endAttrs(acountIdx, acount);
1589 poolbuf.appendBytes(databuf.elems, 0, databuf.length);
1590 out.write(poolbuf.elems, 0, poolbuf.length);
1592 pool = c.pool = null; // to conserve space
1593 }
1595 int adjustFlags(final long flags) {
1596 int result = (int)flags;
1597 if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag())
1598 result &= ~SYNTHETIC;
1599 if ((flags & ENUM) != 0 && !target.useEnumFlag())
1600 result &= ~ENUM;
1601 if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag())
1602 result &= ~ANNOTATION;
1604 if ((flags & BRIDGE) != 0 && target.useBridgeFlag())
1605 result |= ACC_BRIDGE;
1606 if ((flags & VARARGS) != 0 && target.useVarargsFlag())
1607 result |= ACC_VARARGS;
1608 return result;
1609 }
1611 long getLastModified(FileObject filename) {
1612 long mod = 0;
1613 try {
1614 mod = filename.getLastModified();
1615 } catch (SecurityException e) {
1616 throw new AssertionError("CRT: couldn't get source file modification date: " + e.getMessage());
1617 }
1618 return mod;
1619 }
1620 }
