Mercurial > jdk8-mips64-public > langtools / file revision
src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java@005bec70ca27
src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java
Fri, 18 Jun 2010 15:12:04 -0700
- author
- jrose
- date
- Fri, 18 Jun 2010 15:12:04 -0700
- changeset 573
- 005bec70ca27
- parent 554
- 9d9f26857129
- parent 571
- f0e3ec1f9d9f
- child 591
- d1d7595fa824
- permissions
- -rw-r--r--
Merge
1 /*
2 * Copyright (c) 1999, 2009, 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 */
26 package com.sun.tools.javac.jvm;
28 import java.io.*;
29 import java.util.Set;
30 import java.util.HashSet;
32 import javax.tools.JavaFileManager;
33 import javax.tools.FileObject;
34 import javax.tools.JavaFileObject;
36 import com.sun.tools.javac.code.*;
37 import com.sun.tools.javac.code.Symbol.*;
38 import com.sun.tools.javac.code.Type.*;
39 import com.sun.tools.javac.file.BaseFileObject;
40 import com.sun.tools.javac.util.*;
42 import static com.sun.tools.javac.code.BoundKind.*;
43 import static com.sun.tools.javac.code.Flags.*;
44 import static com.sun.tools.javac.code.Kinds.*;
45 import static com.sun.tools.javac.code.TypeTags.*;
46 import static com.sun.tools.javac.jvm.UninitializedType.*;
47 import static javax.tools.StandardLocation.CLASS_OUTPUT;
49 /** This class provides operations to map an internal symbol table graph
50 * rooted in a ClassSymbol into a classfile.
51 *
52 * <p><b>This is NOT part of any API supported by Sun Microsystems. If
53 * you write code that depends on this, you do so at your own risk.
54 * This code and its internal interfaces are subject to change or
55 * deletion without notice.</b>
56 */
57 public class ClassWriter extends ClassFile {
58 protected static final Context.Key<ClassWriter> classWriterKey =
59 new Context.Key<ClassWriter>();
61 private final Symtab syms;
63 private final Options options;
65 /** Switch: debugging output for JSR 308-related operations.
66 */
67 private boolean debugJSR308;
69 /** Switch: verbose output.
70 */
71 private boolean verbose;
73 /** Switch: scrable private names.
74 */
75 private boolean scramble;
77 /** Switch: scrable private names.
78 */
79 private boolean scrambleAll;
81 /** Switch: retrofit mode.
82 */
83 private boolean retrofit;
85 /** Switch: emit source file attribute.
86 */
87 private boolean emitSourceFile;
89 /** Switch: generate CharacterRangeTable attribute.
90 */
91 private boolean genCrt;
93 /** Switch: describe the generated stackmap
94 */
95 boolean debugstackmap;
97 /**
98 * Target class version.
99 */
100 private Target target;
102 /**
103 * Source language version.
104 */
105 private Source source;
107 /** Type utilities. */
108 private Types types;
110 /** The initial sizes of the data and constant pool buffers.
111 * sizes are increased when buffers get full.
112 */
113 static final int DATA_BUF_SIZE = 0x0fff0;
114 static final int POOL_BUF_SIZE = 0x1fff0;
116 /** An output buffer for member info.
117 */
118 ByteBuffer databuf = new ByteBuffer(DATA_BUF_SIZE);
120 /** An output buffer for the constant pool.
121 */
122 ByteBuffer poolbuf = new ByteBuffer(POOL_BUF_SIZE);
124 /** An output buffer for type signatures.
125 */
126 ByteBuffer sigbuf = new ByteBuffer();
128 /** The constant pool.
129 */
130 Pool pool;
132 /** The inner classes to be written, as a set.
133 */
134 Set<ClassSymbol> innerClasses;
136 /** The inner classes to be written, as a queue where
137 * enclosing classes come first.
138 */
139 ListBuffer<ClassSymbol> innerClassesQueue;
141 /** The log to use for verbose output.
142 */
143 private final Log log;
145 /** The name table. */
146 private final Names names;
148 /** Access to files. */
149 private final JavaFileManager fileManager;
151 /** The tags and constants used in compressed stackmap. */
152 static final int SAME_FRAME_SIZE = 64;
153 static final int SAME_LOCALS_1_STACK_ITEM_EXTENDED = 247;
154 static final int SAME_FRAME_EXTENDED = 251;
155 static final int FULL_FRAME = 255;
156 static final int MAX_LOCAL_LENGTH_DIFF = 4;
158 /** Get the ClassWriter instance for this context. */
159 public static ClassWriter instance(Context context) {
160 ClassWriter instance = context.get(classWriterKey);
161 if (instance == null)
162 instance = new ClassWriter(context);
163 return instance;
164 }
166 /** Construct a class writer, given an options table.
167 */
168 private ClassWriter(Context context) {
169 context.put(classWriterKey, this);
171 log = Log.instance(context);
172 names = Names.instance(context);
173 syms = Symtab.instance(context);
174 options = Options.instance(context);
175 target = Target.instance(context);
176 source = Source.instance(context);
177 types = Types.instance(context);
178 fileManager = context.get(JavaFileManager.class);
180 debugJSR308 = options.get("TA:writer") != null;
181 verbose = options.get("-verbose") != null;
182 scramble = options.get("-scramble") != null;
183 scrambleAll = options.get("-scrambleAll") != null;
184 retrofit = options.get("-retrofit") != null;
185 genCrt = options.get("-Xjcov") != null;
186 debugstackmap = options.get("debugstackmap") != null;
188 emitSourceFile = options.get("-g:")==null || options.get("-g:source")!=null;
190 String dumpModFlags = options.get("dumpmodifiers");
191 dumpClassModifiers =
192 (dumpModFlags != null && dumpModFlags.indexOf('c') != -1);
193 dumpFieldModifiers =
194 (dumpModFlags != null && dumpModFlags.indexOf('f') != -1);
195 dumpInnerClassModifiers =
196 (dumpModFlags != null && dumpModFlags.indexOf('i') != -1);
197 dumpMethodModifiers =
198 (dumpModFlags != null && dumpModFlags.indexOf('m') != -1);
199 }
201 /******************************************************************
202 * Diagnostics: dump generated class names and modifiers
203 ******************************************************************/
205 /** Value of option 'dumpmodifiers' is a string
206 * indicating which modifiers should be dumped for debugging:
207 * 'c' -- classes
208 * 'f' -- fields
209 * 'i' -- innerclass attributes
210 * 'm' -- methods
211 * For example, to dump everything:
212 * javac -XDdumpmodifiers=cifm MyProg.java
213 */
214 private final boolean dumpClassModifiers; // -XDdumpmodifiers=c
215 private final boolean dumpFieldModifiers; // -XDdumpmodifiers=f
216 private final boolean dumpInnerClassModifiers; // -XDdumpmodifiers=i
217 private final boolean dumpMethodModifiers; // -XDdumpmodifiers=m
220 /** Return flags as a string, separated by " ".
221 */
222 public static String flagNames(long flags) {
223 StringBuffer sbuf = new StringBuffer();
224 int i = 0;
225 long f = flags & StandardFlags;
226 while (f != 0) {
227 if ((f & 1) != 0) sbuf.append(" " + flagName[i]);
228 f = f >> 1;
229 i++;
230 }
231 return sbuf.toString();
232 }
233 //where
234 private final static String[] flagName = {
235 "PUBLIC", "PRIVATE", "PROTECTED", "STATIC", "FINAL",
236 "SUPER", "VOLATILE", "TRANSIENT", "NATIVE", "INTERFACE",
237 "ABSTRACT", "STRICTFP"};
239 /******************************************************************
240 * Output routines
241 ******************************************************************/
243 /** Write a character into given byte buffer;
244 * byte buffer will not be grown.
245 */
246 void putChar(ByteBuffer buf, int op, int x) {
247 buf.elems[op ] = (byte)((x >> 8) & 0xFF);
248 buf.elems[op+1] = (byte)((x ) & 0xFF);
249 }
251 /** Write an integer into given byte buffer;
252 * byte buffer will not be grown.
253 */
254 void putInt(ByteBuffer buf, int adr, int x) {
255 buf.elems[adr ] = (byte)((x >> 24) & 0xFF);
256 buf.elems[adr+1] = (byte)((x >> 16) & 0xFF);
257 buf.elems[adr+2] = (byte)((x >> 8) & 0xFF);
258 buf.elems[adr+3] = (byte)((x ) & 0xFF);
259 }
261 /******************************************************************
262 * Signature Generation
263 ******************************************************************/
265 /** Assemble signature of given type in string buffer.
266 */
267 void assembleSig(Type type) {
268 switch (type.tag) {
269 case BYTE:
270 sigbuf.appendByte('B');
271 break;
272 case SHORT:
273 sigbuf.appendByte('S');
274 break;
275 case CHAR:
276 sigbuf.appendByte('C');
277 break;
278 case INT:
279 sigbuf.appendByte('I');
280 break;
281 case LONG:
282 sigbuf.appendByte('J');
283 break;
284 case FLOAT:
285 sigbuf.appendByte('F');
286 break;
287 case DOUBLE:
288 sigbuf.appendByte('D');
289 break;
290 case BOOLEAN:
291 sigbuf.appendByte('Z');
292 break;
293 case VOID:
294 sigbuf.appendByte('V');
295 break;
296 case CLASS:
297 sigbuf.appendByte('L');
298 assembleClassSig(type);
299 sigbuf.appendByte(';');
300 break;
301 case ARRAY:
302 ArrayType at = (ArrayType)type;
303 sigbuf.appendByte('[');
304 assembleSig(at.elemtype);
305 break;
306 case METHOD:
307 MethodType mt = (MethodType)type;
308 sigbuf.appendByte('(');
309 assembleSig(mt.argtypes);
310 sigbuf.appendByte(')');
311 assembleSig(mt.restype);
312 if (hasTypeVar(mt.thrown)) {
313 for (List<Type> l = mt.thrown; l.nonEmpty(); l = l.tail) {
314 sigbuf.appendByte('^');
315 assembleSig(l.head);
316 }
317 }
318 break;
319 case WILDCARD: {
320 WildcardType ta = (WildcardType) type;
321 switch (ta.kind) {
322 case SUPER:
323 sigbuf.appendByte('-');
324 assembleSig(ta.type);
325 break;
326 case EXTENDS:
327 sigbuf.appendByte('+');
328 assembleSig(ta.type);
329 break;
330 case UNBOUND:
331 sigbuf.appendByte('*');
332 break;
333 default:
334 throw new AssertionError(ta.kind);
335 }
336 break;
337 }
338 case TYPEVAR:
339 sigbuf.appendByte('T');
340 sigbuf.appendName(type.tsym.name);
341 sigbuf.appendByte(';');
342 break;
343 case FORALL:
344 ForAll ft = (ForAll)type;
345 assembleParamsSig(ft.tvars);
346 assembleSig(ft.qtype);
347 break;
348 case UNINITIALIZED_THIS:
349 case UNINITIALIZED_OBJECT:
350 // we don't yet have a spec for uninitialized types in the
351 // local variable table
352 assembleSig(types.erasure(((UninitializedType)type).qtype));
353 break;
354 default:
355 throw new AssertionError("typeSig " + type.tag);
356 }
357 }
359 boolean hasTypeVar(List<Type> l) {
360 while (l.nonEmpty()) {
361 if (l.head.tag == TypeTags.TYPEVAR) return true;
362 l = l.tail;
363 }
364 return false;
365 }
367 void assembleClassSig(Type type) {
368 ClassType ct = (ClassType)type;
369 ClassSymbol c = (ClassSymbol)ct.tsym;
370 enterInner(c);
371 Type outer = ct.getEnclosingType();
372 if (outer.allparams().nonEmpty()) {
373 boolean rawOuter =
374 c.owner.kind == MTH || // either a local class
375 c.name == names.empty; // or anonymous
376 assembleClassSig(rawOuter
377 ? types.erasure(outer)
378 : outer);
379 sigbuf.appendByte('.');
380 assert c.flatname.startsWith(c.owner.enclClass().flatname);
381 sigbuf.appendName(rawOuter
382 ? c.flatname.subName(c.owner.enclClass().flatname.getByteLength()+1,c.flatname.getByteLength())
383 : c.name);
384 } else {
385 sigbuf.appendBytes(externalize(c.flatname));
386 }
387 if (ct.getTypeArguments().nonEmpty()) {
388 sigbuf.appendByte('<');
389 assembleSig(ct.getTypeArguments());
390 sigbuf.appendByte('>');
391 }
392 }
395 void assembleSig(List<Type> types) {
396 for (List<Type> ts = types; ts.nonEmpty(); ts = ts.tail)
397 assembleSig(ts.head);
398 }
400 void assembleParamsSig(List<Type> typarams) {
401 sigbuf.appendByte('<');
402 for (List<Type> ts = typarams; ts.nonEmpty(); ts = ts.tail) {
403 TypeVar tvar = (TypeVar)ts.head;
404 sigbuf.appendName(tvar.tsym.name);
405 List<Type> bounds = types.getBounds(tvar);
406 if ((bounds.head.tsym.flags() & INTERFACE) != 0) {
407 sigbuf.appendByte(':');
408 }
409 for (List<Type> l = bounds; l.nonEmpty(); l = l.tail) {
410 sigbuf.appendByte(':');
411 assembleSig(l.head);
412 }
413 }
414 sigbuf.appendByte('>');
415 }
417 /** Return signature of given type
418 */
419 Name typeSig(Type type) {
420 assert sigbuf.length == 0;
421 //- System.out.println(" ? " + type);
422 assembleSig(type);
423 Name n = sigbuf.toName(names);
424 sigbuf.reset();
425 //- System.out.println(" " + n);
426 return n;
427 }
429 /** Given a type t, return the extended class name of its erasure in
430 * external representation.
431 */
432 public Name xClassName(Type t) {
433 if (t.tag == CLASS) {
434 return names.fromUtf(externalize(t.tsym.flatName()));
435 } else if (t.tag == ARRAY) {
436 return typeSig(types.erasure(t));
437 } else {
438 throw new AssertionError("xClassName");
439 }
440 }
442 /******************************************************************
443 * Writing the Constant Pool
444 ******************************************************************/
446 /** Thrown when the constant pool is over full.
447 */
448 public static class PoolOverflow extends Exception {
449 private static final long serialVersionUID = 0;
450 public PoolOverflow() {}
451 }
452 public static class StringOverflow extends Exception {
453 private static final long serialVersionUID = 0;
454 public final String value;
455 public StringOverflow(String s) {
456 value = s;
457 }
458 }
460 /** Write constant pool to pool buffer.
461 * Note: during writing, constant pool
462 * might grow since some parts of constants still need to be entered.
463 */
464 void writePool(Pool pool) throws PoolOverflow, StringOverflow {
465 int poolCountIdx = poolbuf.length;
466 poolbuf.appendChar(0);
467 int i = 1;
468 while (i < pool.pp) {
469 Object value = pool.pool[i];
470 assert value != null;
471 if (value instanceof Pool.Method)
472 value = ((Pool.Method)value).m;
473 else if (value instanceof Pool.Variable)
474 value = ((Pool.Variable)value).v;
476 if (value instanceof MethodSymbol) {
477 MethodSymbol m = (MethodSymbol)value;
478 poolbuf.appendByte((m.owner.flags() & INTERFACE) != 0
479 ? CONSTANT_InterfaceMethodref
480 : CONSTANT_Methodref);
481 poolbuf.appendChar(pool.put(m.owner));
482 poolbuf.appendChar(pool.put(nameType(m)));
483 } else if (value instanceof VarSymbol) {
484 VarSymbol v = (VarSymbol)value;
485 poolbuf.appendByte(CONSTANT_Fieldref);
486 poolbuf.appendChar(pool.put(v.owner));
487 poolbuf.appendChar(pool.put(nameType(v)));
488 } else if (value instanceof Name) {
489 poolbuf.appendByte(CONSTANT_Utf8);
490 byte[] bs = ((Name)value).toUtf();
491 poolbuf.appendChar(bs.length);
492 poolbuf.appendBytes(bs, 0, bs.length);
493 if (bs.length > Pool.MAX_STRING_LENGTH)
494 throw new StringOverflow(value.toString());
495 } else if (value instanceof ClassSymbol) {
496 ClassSymbol c = (ClassSymbol)value;
497 if (c.owner.kind == TYP) pool.put(c.owner);
498 poolbuf.appendByte(CONSTANT_Class);
499 if (c.type.tag == ARRAY) {
500 poolbuf.appendChar(pool.put(typeSig(c.type)));
501 } else {
502 poolbuf.appendChar(pool.put(names.fromUtf(externalize(c.flatname))));
503 enterInner(c);
504 }
505 } else if (value instanceof NameAndType) {
506 NameAndType nt = (NameAndType)value;
507 poolbuf.appendByte(CONSTANT_NameandType);
508 poolbuf.appendChar(pool.put(nt.name));
509 poolbuf.appendChar(pool.put(typeSig(nt.type)));
510 } else if (value instanceof Integer) {
511 poolbuf.appendByte(CONSTANT_Integer);
512 poolbuf.appendInt(((Integer)value).intValue());
513 } else if (value instanceof Long) {
514 poolbuf.appendByte(CONSTANT_Long);
515 poolbuf.appendLong(((Long)value).longValue());
516 i++;
517 } else if (value instanceof Float) {
518 poolbuf.appendByte(CONSTANT_Float);
519 poolbuf.appendFloat(((Float)value).floatValue());
520 } else if (value instanceof Double) {
521 poolbuf.appendByte(CONSTANT_Double);
522 poolbuf.appendDouble(((Double)value).doubleValue());
523 i++;
524 } else if (value instanceof String) {
525 poolbuf.appendByte(CONSTANT_String);
526 poolbuf.appendChar(pool.put(names.fromString((String)value)));
527 } else if (value instanceof Type) {
528 Type type = (Type)value;
529 if (type.tag == CLASS) enterInner((ClassSymbol)type.tsym);
530 poolbuf.appendByte(CONSTANT_Class);
531 poolbuf.appendChar(pool.put(xClassName(type)));
532 } else {
533 assert false : "writePool " + value;
534 }
535 i++;
536 }
537 if (pool.pp > Pool.MAX_ENTRIES)
538 throw new PoolOverflow();
539 putChar(poolbuf, poolCountIdx, pool.pp);
540 }
542 /** Given a field, return its name.
543 */
544 Name fieldName(Symbol sym) {
545 if (scramble && (sym.flags() & PRIVATE) != 0 ||
546 scrambleAll && (sym.flags() & (PROTECTED | PUBLIC)) == 0)
547 return names.fromString("_$" + sym.name.getIndex());
548 else
549 return sym.name;
550 }
552 /** Given a symbol, return its name-and-type.
553 */
554 NameAndType nameType(Symbol sym) {
555 return new NameAndType(fieldName(sym),
556 retrofit
557 ? sym.erasure(types)
558 : sym.externalType(types));
559 // if we retrofit, then the NameAndType has been read in as is
560 // and no change is necessary. If we compile normally, the
561 // NameAndType is generated from a symbol reference, and the
562 // adjustment of adding an additional this$n parameter needs to be made.
563 }
565 /******************************************************************
566 * Writing Attributes
567 ******************************************************************/
569 /** Write header for an attribute to data buffer and return
570 * position past attribute length index.
571 */
572 int writeAttr(Name attrName) {
573 databuf.appendChar(pool.put(attrName));
574 databuf.appendInt(0);
575 return databuf.length;
576 }
578 /** Fill in attribute length.
579 */
580 void endAttr(int index) {
581 putInt(databuf, index - 4, databuf.length - index);
582 }
584 /** Leave space for attribute count and return index for
585 * number of attributes field.
586 */
587 int beginAttrs() {
588 databuf.appendChar(0);
589 return databuf.length;
590 }
592 /** Fill in number of attributes.
593 */
594 void endAttrs(int index, int count) {
595 putChar(databuf, index - 2, count);
596 }
598 /** Write the EnclosingMethod attribute if needed.
599 * Returns the number of attributes written (0 or 1).
600 */
601 int writeEnclosingMethodAttribute(ClassSymbol c) {
602 if (!target.hasEnclosingMethodAttribute() ||
603 c.owner.kind != MTH && // neither a local class
604 c.name != names.empty) // nor anonymous
605 return 0;
607 int alenIdx = writeAttr(names.EnclosingMethod);
608 ClassSymbol enclClass = c.owner.enclClass();
609 MethodSymbol enclMethod =
610 (c.owner.type == null // local to init block
611 || c.owner.kind != MTH) // or member init
612 ? null
613 : (MethodSymbol)c.owner;
614 databuf.appendChar(pool.put(enclClass));
615 databuf.appendChar(enclMethod == null ? 0 : pool.put(nameType(c.owner)));
616 endAttr(alenIdx);
617 return 1;
618 }
620 /** Write flag attributes; return number of attributes written.
621 */
622 int writeFlagAttrs(long flags) {
623 int acount = 0;
624 if ((flags & DEPRECATED) != 0) {
625 int alenIdx = writeAttr(names.Deprecated);
626 endAttr(alenIdx);
627 acount++;
628 }
629 if ((flags & ENUM) != 0 && !target.useEnumFlag()) {
630 int alenIdx = writeAttr(names.Enum);
631 endAttr(alenIdx);
632 acount++;
633 }
634 if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag()) {
635 int alenIdx = writeAttr(names.Synthetic);
636 endAttr(alenIdx);
637 acount++;
638 }
639 if ((flags & BRIDGE) != 0 && !target.useBridgeFlag()) {
640 int alenIdx = writeAttr(names.Bridge);
641 endAttr(alenIdx);
642 acount++;
643 }
644 if ((flags & VARARGS) != 0 && !target.useVarargsFlag()) {
645 int alenIdx = writeAttr(names.Varargs);
646 endAttr(alenIdx);
647 acount++;
648 }
649 if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag()) {
650 int alenIdx = writeAttr(names.Annotation);
651 endAttr(alenIdx);
652 acount++;
653 }
654 if ((flags & POLYMORPHIC_SIGNATURE) != 0) {
655 if (target.majorVersion < 51)
656 throw new AssertionError("PolymorphicSignature attributes in java/dyn must be written with -target 7 (required major version is 51, current is"+target.majorVersion+")");
657 int alenIdx = writeAttr(names.PolymorphicSignature);
658 endAttr(alenIdx);
659 acount++;
660 }
661 return acount;
662 }
664 /** Write member (field or method) attributes;
665 * return number of attributes written.
666 */
667 int writeMemberAttrs(Symbol sym) {
668 int acount = writeFlagAttrs(sym.flags());
669 long flags = sym.flags();
670 if (source.allowGenerics() &&
671 (flags & (SYNTHETIC|BRIDGE)) != SYNTHETIC &&
672 (flags & ANONCONSTR) == 0 &&
673 (!types.isSameType(sym.type, sym.erasure(types)) ||
674 hasTypeVar(sym.type.getThrownTypes()))) {
675 // note that a local class with captured variables
676 // will get a signature attribute
677 int alenIdx = writeAttr(names.Signature);
678 databuf.appendChar(pool.put(typeSig(sym.type)));
679 endAttr(alenIdx);
680 acount++;
681 }
682 acount += writeJavaAnnotations(sym.getAnnotationMirrors());
683 acount += writeTypeAnnotations(sym.typeAnnotations);
684 return acount;
685 }
687 /** Write method parameter annotations;
688 * return number of attributes written.
689 */
690 int writeParameterAttrs(MethodSymbol m) {
691 boolean hasVisible = false;
692 boolean hasInvisible = false;
693 if (m.params != null) for (VarSymbol s : m.params) {
694 for (Attribute.Compound a : s.getAnnotationMirrors()) {
695 switch (getRetention(a.type.tsym)) {
696 case SOURCE: break;
697 case CLASS: hasInvisible = true; break;
698 case RUNTIME: hasVisible = true; break;
699 default: ;// /* fail soft */ throw new AssertionError(vis);
700 }
701 }
702 }
704 int attrCount = 0;
705 if (hasVisible) {
706 int attrIndex = writeAttr(names.RuntimeVisibleParameterAnnotations);
707 databuf.appendByte(m.params.length());
708 for (VarSymbol s : m.params) {
709 ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();
710 for (Attribute.Compound a : s.getAnnotationMirrors())
711 if (getRetention(a.type.tsym) == RetentionPolicy.RUNTIME)
712 buf.append(a);
713 databuf.appendChar(buf.length());
714 for (Attribute.Compound a : buf)
715 writeCompoundAttribute(a);
716 }
717 endAttr(attrIndex);
718 attrCount++;
719 }
720 if (hasInvisible) {
721 int attrIndex = writeAttr(names.RuntimeInvisibleParameterAnnotations);
722 databuf.appendByte(m.params.length());
723 for (VarSymbol s : m.params) {
724 ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();
725 for (Attribute.Compound a : s.getAnnotationMirrors())
726 if (getRetention(a.type.tsym) == RetentionPolicy.CLASS)
727 buf.append(a);
728 databuf.appendChar(buf.length());
729 for (Attribute.Compound a : buf)
730 writeCompoundAttribute(a);
731 }
732 endAttr(attrIndex);
733 attrCount++;
734 }
735 return attrCount;
736 }
738 /**********************************************************************
739 * Writing Java-language annotations (aka metadata, attributes)
740 **********************************************************************/
742 /** Write Java-language annotations; return number of JVM
743 * attributes written (zero or one).
744 */
745 int writeJavaAnnotations(List<Attribute.Compound> attrs) {
746 if (attrs.isEmpty()) return 0;
747 ListBuffer<Attribute.Compound> visibles = new ListBuffer<Attribute.Compound>();
748 ListBuffer<Attribute.Compound> invisibles = new ListBuffer<Attribute.Compound>();
749 for (Attribute.Compound a : attrs) {
750 switch (getRetention(a.type.tsym)) {
751 case SOURCE: break;
752 case CLASS: invisibles.append(a); break;
753 case RUNTIME: visibles.append(a); break;
754 default: ;// /* fail soft */ throw new AssertionError(vis);
755 }
756 }
758 int attrCount = 0;
759 if (visibles.length() != 0) {
760 int attrIndex = writeAttr(names.RuntimeVisibleAnnotations);
761 databuf.appendChar(visibles.length());
762 for (Attribute.Compound a : visibles)
763 writeCompoundAttribute(a);
764 endAttr(attrIndex);
765 attrCount++;
766 }
767 if (invisibles.length() != 0) {
768 int attrIndex = writeAttr(names.RuntimeInvisibleAnnotations);
769 databuf.appendChar(invisibles.length());
770 for (Attribute.Compound a : invisibles)
771 writeCompoundAttribute(a);
772 endAttr(attrIndex);
773 attrCount++;
774 }
775 return attrCount;
776 }
778 int writeTypeAnnotations(List<Attribute.TypeCompound> typeAnnos) {
779 if (typeAnnos.isEmpty()) return 0;
781 ListBuffer<Attribute.TypeCompound> visibles = ListBuffer.lb();
782 ListBuffer<Attribute.TypeCompound> invisibles = ListBuffer.lb();
784 for (Attribute.TypeCompound tc : typeAnnos) {
785 if (tc.position.type == TargetType.UNKNOWN
786 || !tc.position.emitToClassfile())
787 continue;
788 switch (getRetention(tc.type.tsym)) {
789 case SOURCE: break;
790 case CLASS: invisibles.append(tc); break;
791 case RUNTIME: visibles.append(tc); break;
792 default: ;// /* fail soft */ throw new AssertionError(vis);
793 }
794 }
796 int attrCount = 0;
797 if (visibles.length() != 0) {
798 int attrIndex = writeAttr(names.RuntimeVisibleTypeAnnotations);
799 databuf.appendChar(visibles.length());
800 for (Attribute.TypeCompound p : visibles)
801 writeTypeAnnotation(p);
802 endAttr(attrIndex);
803 attrCount++;
804 }
806 if (invisibles.length() != 0) {
807 int attrIndex = writeAttr(names.RuntimeInvisibleTypeAnnotations);
808 databuf.appendChar(invisibles.length());
809 for (Attribute.TypeCompound p : invisibles)
810 writeTypeAnnotation(p);
811 endAttr(attrIndex);
812 attrCount++;
813 }
815 return attrCount;
816 }
818 /** A mirror of java.lang.annotation.RetentionPolicy. */
819 enum RetentionPolicy {
820 SOURCE,
821 CLASS,
822 RUNTIME
823 }
825 RetentionPolicy getRetention(TypeSymbol annotationType) {
826 RetentionPolicy vis = RetentionPolicy.CLASS; // the default
827 Attribute.Compound c = annotationType.attribute(syms.retentionType.tsym);
828 if (c != null) {
829 Attribute value = c.member(names.value);
830 if (value != null && value instanceof Attribute.Enum) {
831 Name levelName = ((Attribute.Enum)value).value.name;
832 if (levelName == names.SOURCE) vis = RetentionPolicy.SOURCE;
833 else if (levelName == names.CLASS) vis = RetentionPolicy.CLASS;
834 else if (levelName == names.RUNTIME) vis = RetentionPolicy.RUNTIME;
835 else ;// /* fail soft */ throw new AssertionError(levelName);
836 }
837 }
838 return vis;
839 }
841 /** A visitor to write an attribute including its leading
842 * single-character marker.
843 */
844 class AttributeWriter implements Attribute.Visitor {
845 public void visitConstant(Attribute.Constant _value) {
846 Object value = _value.value;
847 switch (_value.type.tag) {
848 case BYTE:
849 databuf.appendByte('B');
850 break;
851 case CHAR:
852 databuf.appendByte('C');
853 break;
854 case SHORT:
855 databuf.appendByte('S');
856 break;
857 case INT:
858 databuf.appendByte('I');
859 break;
860 case LONG:
861 databuf.appendByte('J');
862 break;
863 case FLOAT:
864 databuf.appendByte('F');
865 break;
866 case DOUBLE:
867 databuf.appendByte('D');
868 break;
869 case BOOLEAN:
870 databuf.appendByte('Z');
871 break;
872 case CLASS:
873 assert value instanceof String;
874 databuf.appendByte('s');
875 value = names.fromString(value.toString()); // CONSTANT_Utf8
876 break;
877 default:
878 throw new AssertionError(_value.type);
879 }
880 databuf.appendChar(pool.put(value));
881 }
882 public void visitEnum(Attribute.Enum e) {
883 databuf.appendByte('e');
884 databuf.appendChar(pool.put(typeSig(e.value.type)));
885 databuf.appendChar(pool.put(e.value.name));
886 }
887 public void visitClass(Attribute.Class clazz) {
888 databuf.appendByte('c');
889 databuf.appendChar(pool.put(typeSig(clazz.type)));
890 }
891 public void visitCompound(Attribute.Compound compound) {
892 databuf.appendByte('@');
893 writeCompoundAttribute(compound);
894 }
895 public void visitError(Attribute.Error x) {
896 throw new AssertionError(x);
897 }
898 public void visitArray(Attribute.Array array) {
899 databuf.appendByte('[');
900 databuf.appendChar(array.values.length);
901 for (Attribute a : array.values) {
902 a.accept(this);
903 }
904 }
905 }
906 AttributeWriter awriter = new AttributeWriter();
908 /** Write a compound attribute excluding the '@' marker. */
909 void writeCompoundAttribute(Attribute.Compound c) {
910 databuf.appendChar(pool.put(typeSig(c.type)));
911 databuf.appendChar(c.values.length());
912 for (Pair<Symbol.MethodSymbol,Attribute> p : c.values) {
913 databuf.appendChar(pool.put(p.fst.name));
914 p.snd.accept(awriter);
915 }
916 }
918 void writeTypeAnnotation(Attribute.TypeCompound c) {
919 if (debugJSR308)
920 System.out.println("TA: writing " + c + " at " + c.position
921 + " in " + log.currentSourceFile());
922 writeCompoundAttribute(c);
923 writePosition(c.position);
924 }
926 void writePosition(TypeAnnotationPosition p) {
927 databuf.appendByte(p.type.targetTypeValue());
928 switch (p.type) {
929 // type case
930 case TYPECAST:
931 case TYPECAST_GENERIC_OR_ARRAY:
932 // object creation
933 case INSTANCEOF:
934 case INSTANCEOF_GENERIC_OR_ARRAY:
935 // new expression
936 case NEW:
937 case NEW_GENERIC_OR_ARRAY:
938 databuf.appendChar(p.offset);
939 break;
940 // local variable
941 case LOCAL_VARIABLE:
942 case LOCAL_VARIABLE_GENERIC_OR_ARRAY:
943 databuf.appendChar(p.lvarOffset.length); // for table length
944 for (int i = 0; i < p.lvarOffset.length; ++i) {
945 databuf.appendChar(p.lvarOffset[i]);
946 databuf.appendChar(p.lvarLength[i]);
947 databuf.appendChar(p.lvarIndex[i]);
948 }
949 break;
950 // method receiver
951 case METHOD_RECEIVER:
952 // Do nothing
953 break;
954 // type parameters
955 case CLASS_TYPE_PARAMETER:
956 case METHOD_TYPE_PARAMETER:
957 databuf.appendByte(p.parameter_index);
958 break;
959 // type parameters bounds
960 case CLASS_TYPE_PARAMETER_BOUND:
961 case CLASS_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
962 case METHOD_TYPE_PARAMETER_BOUND:
963 case METHOD_TYPE_PARAMETER_BOUND_GENERIC_OR_ARRAY:
964 databuf.appendByte(p.parameter_index);
965 databuf.appendByte(p.bound_index);
966 break;
967 // wildcards
968 case WILDCARD_BOUND:
969 case WILDCARD_BOUND_GENERIC_OR_ARRAY:
970 writePosition(p.wildcard_position);
971 break;
972 // Class extends and implements clauses
973 case CLASS_EXTENDS:
974 case CLASS_EXTENDS_GENERIC_OR_ARRAY:
975 databuf.appendChar(p.type_index);
976 break;
977 // throws
978 case THROWS:
979 databuf.appendChar(p.type_index);
980 break;
981 case CLASS_LITERAL:
982 case CLASS_LITERAL_GENERIC_OR_ARRAY:
983 databuf.appendChar(p.offset);
984 break;
985 // method parameter: not specified
986 case METHOD_PARAMETER_GENERIC_OR_ARRAY:
987 databuf.appendByte(p.parameter_index);
988 break;
989 // method type argument: wasn't specified
990 case NEW_TYPE_ARGUMENT:
991 case NEW_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
992 case METHOD_TYPE_ARGUMENT:
993 case METHOD_TYPE_ARGUMENT_GENERIC_OR_ARRAY:
994 databuf.appendChar(p.offset);
995 databuf.appendByte(p.type_index);
996 break;
997 // We don't need to worry abut these
998 case METHOD_RETURN_GENERIC_OR_ARRAY:
999 case FIELD_GENERIC_OR_ARRAY:
1000 break;
1001 case UNKNOWN:
1002 break;
1003 default:
1004 throw new AssertionError("unknown position: " + p);
1005 }
1007 // Append location data for generics/arrays.
1008 if (p.type.hasLocation()) {
1009 databuf.appendChar(p.location.size());
1010 for (int i : p.location)
1011 databuf.appendByte((byte)i);
1012 }
1013 }
1015 /**********************************************************************
1016 * Writing Objects
1017 **********************************************************************/
1019 /** Enter an inner class into the `innerClasses' set/queue.
1020 */
1021 void enterInner(ClassSymbol c) {
1022 assert !c.type.isCompound();
1023 try {
1024 c.complete();
1025 } catch (CompletionFailure ex) {
1026 System.err.println("error: " + c + ": " + ex.getMessage());
1027 throw ex;
1028 }
1029 if (c.type.tag != CLASS) return; // arrays
1030 if (pool != null && // pool might be null if called from xClassName
1031 c.owner.kind != PCK &&
1032 (innerClasses == null || !innerClasses.contains(c))) {
1033 // log.errWriter.println("enter inner " + c);//DEBUG
1034 if (c.owner.kind == TYP) enterInner((ClassSymbol)c.owner);
1035 pool.put(c);
1036 pool.put(c.name);
1037 if (innerClasses == null) {
1038 innerClasses = new HashSet<ClassSymbol>();
1039 innerClassesQueue = new ListBuffer<ClassSymbol>();
1040 pool.put(names.InnerClasses);
1041 }
1042 innerClasses.add(c);
1043 innerClassesQueue.append(c);
1044 }
1045 }
1047 /** Write "inner classes" attribute.
1048 */
1049 void writeInnerClasses() {
1050 int alenIdx = writeAttr(names.InnerClasses);
1051 databuf.appendChar(innerClassesQueue.length());
1052 for (List<ClassSymbol> l = innerClassesQueue.toList();
1053 l.nonEmpty();
1054 l = l.tail) {
1055 ClassSymbol inner = l.head;
1056 char flags = (char) adjustFlags(inner.flags_field);
1057 if ((flags & INTERFACE) != 0) flags |= ABSTRACT; // Interfaces are always ABSTRACT
1058 if (inner.name.isEmpty()) flags &= ~FINAL; // Anonymous class: unset FINAL flag
1059 if (dumpInnerClassModifiers) {
1060 log.errWriter.println("INNERCLASS " + inner.name);
1061 log.errWriter.println("---" + flagNames(flags));
1062 }
1063 databuf.appendChar(pool.get(inner));
1064 databuf.appendChar(
1065 inner.owner.kind == TYP ? pool.get(inner.owner) : 0);
1066 databuf.appendChar(
1067 !inner.name.isEmpty() ? pool.get(inner.name) : 0);
1068 databuf.appendChar(flags);
1069 }
1070 endAttr(alenIdx);
1071 }
1073 /** Write field symbol, entering all references into constant pool.
1074 */
1075 void writeField(VarSymbol v) {
1076 int flags = adjustFlags(v.flags());
1077 databuf.appendChar(flags);
1078 if (dumpFieldModifiers) {
1079 log.errWriter.println("FIELD " + fieldName(v));
1080 log.errWriter.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 }
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 log.errWriter.println("METHOD " + fieldName(m));
1103 log.errWriter.println("---" + flagNames(m.flags()));
1104 }
1105 databuf.appendChar(pool.put(fieldName(m)));
1106 databuf.appendChar(pool.put(typeSig(m.externalType(types))));
1107 int acountIdx = beginAttrs();
1108 int acount = 0;
1109 if (m.code != null) {
1110 int alenIdx = writeAttr(names.Code);
1111 writeCode(m.code);
1112 m.code = null; // to conserve space
1113 endAttr(alenIdx);
1114 acount++;
1115 }
1116 List<Type> thrown = m.erasure(types).getThrownTypes();
1117 if (thrown.nonEmpty()) {
1118 int alenIdx = writeAttr(names.Exceptions);
1119 databuf.appendChar(thrown.length());
1120 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail)
1121 databuf.appendChar(pool.put(l.head.tsym));
1122 endAttr(alenIdx);
1123 acount++;
1124 }
1125 if (m.defaultValue != null) {
1126 int alenIdx = writeAttr(names.AnnotationDefault);
1127 m.defaultValue.accept(awriter);
1128 endAttr(alenIdx);
1129 acount++;
1130 }
1131 acount += writeMemberAttrs(m);
1132 acount += writeParameterAttrs(m);
1133 endAttrs(acountIdx, acount);
1134 }
1136 /** Write code attribute of method.
1137 */
1138 void writeCode(Code code) {
1139 databuf.appendChar(code.max_stack);
1140 databuf.appendChar(code.max_locals);
1141 databuf.appendInt(code.cp);
1142 databuf.appendBytes(code.code, 0, code.cp);
1143 databuf.appendChar(code.catchInfo.length());
1144 for (List<char[]> l = code.catchInfo.toList();
1145 l.nonEmpty();
1146 l = l.tail) {
1147 for (int i = 0; i < l.head.length; i++)
1148 databuf.appendChar(l.head[i]);
1149 }
1150 int acountIdx = beginAttrs();
1151 int acount = 0;
1153 if (code.lineInfo.nonEmpty()) {
1154 int alenIdx = writeAttr(names.LineNumberTable);
1155 databuf.appendChar(code.lineInfo.length());
1156 for (List<char[]> l = code.lineInfo.reverse();
1157 l.nonEmpty();
1158 l = l.tail)
1159 for (int i = 0; i < l.head.length; i++)
1160 databuf.appendChar(l.head[i]);
1161 endAttr(alenIdx);
1162 acount++;
1163 }
1165 if (genCrt && (code.crt != null)) {
1166 CRTable crt = code.crt;
1167 int alenIdx = writeAttr(names.CharacterRangeTable);
1168 int crtIdx = beginAttrs();
1169 int crtEntries = crt.writeCRT(databuf, code.lineMap, log);
1170 endAttrs(crtIdx, crtEntries);
1171 endAttr(alenIdx);
1172 acount++;
1173 }
1175 // counter for number of generic local variables
1176 int nGenericVars = 0;
1178 if (code.varBufferSize > 0) {
1179 int alenIdx = writeAttr(names.LocalVariableTable);
1180 databuf.appendChar(code.varBufferSize);
1182 for (int i=0; i<code.varBufferSize; i++) {
1183 Code.LocalVar var = code.varBuffer[i];
1185 // write variable info
1186 assert var.start_pc >= 0;
1187 assert var.start_pc <= code.cp;
1188 databuf.appendChar(var.start_pc);
1189 assert var.length >= 0;
1190 assert (var.start_pc + var.length) <= code.cp;
1191 databuf.appendChar(var.length);
1192 VarSymbol sym = var.sym;
1193 databuf.appendChar(pool.put(sym.name));
1194 Type vartype = sym.erasure(types);
1195 if (!types.isSameType(sym.type, vartype))
1196 nGenericVars++;
1197 databuf.appendChar(pool.put(typeSig(vartype)));
1198 databuf.appendChar(var.reg);
1199 }
1200 endAttr(alenIdx);
1201 acount++;
1202 }
1204 if (nGenericVars > 0) {
1205 int alenIdx = writeAttr(names.LocalVariableTypeTable);
1206 databuf.appendChar(nGenericVars);
1207 int count = 0;
1209 for (int i=0; i<code.varBufferSize; i++) {
1210 Code.LocalVar var = code.varBuffer[i];
1211 VarSymbol sym = var.sym;
1212 if (types.isSameType(sym.type, sym.erasure(types)))
1213 continue;
1214 count++;
1215 // write variable info
1216 databuf.appendChar(var.start_pc);
1217 databuf.appendChar(var.length);
1218 databuf.appendChar(pool.put(sym.name));
1219 databuf.appendChar(pool.put(typeSig(sym.type)));
1220 databuf.appendChar(var.reg);
1221 }
1222 assert count == nGenericVars;
1223 endAttr(alenIdx);
1224 acount++;
1225 }
1227 if (code.stackMapBufferSize > 0) {
1228 if (debugstackmap) System.out.println("Stack map for " + code.meth);
1229 int alenIdx = writeAttr(code.stackMap.getAttributeName(names));
1230 writeStackMap(code);
1231 endAttr(alenIdx);
1232 acount++;
1233 }
1234 endAttrs(acountIdx, acount);
1235 }
1237 void writeStackMap(Code code) {
1238 int nframes = code.stackMapBufferSize;
1239 if (debugstackmap) System.out.println(" nframes = " + nframes);
1240 databuf.appendChar(nframes);
1242 switch (code.stackMap) {
1243 case CLDC:
1244 for (int i=0; i<nframes; i++) {
1245 if (debugstackmap) System.out.print(" " + i + ":");
1246 Code.StackMapFrame frame = code.stackMapBuffer[i];
1248 // output PC
1249 if (debugstackmap) System.out.print(" pc=" + frame.pc);
1250 databuf.appendChar(frame.pc);
1252 // output locals
1253 int localCount = 0;
1254 for (int j=0; j<frame.locals.length;
1255 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
1256 localCount++;
1257 }
1258 if (debugstackmap) System.out.print(" nlocals=" +
1259 localCount);
1260 databuf.appendChar(localCount);
1261 for (int j=0; j<frame.locals.length;
1262 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
1263 if (debugstackmap) System.out.print(" local[" + j + "]=");
1264 writeStackMapType(frame.locals[j]);
1265 }
1267 // output stack
1268 int stackCount = 0;
1269 for (int j=0; j<frame.stack.length;
1270 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
1271 stackCount++;
1272 }
1273 if (debugstackmap) System.out.print(" nstack=" +
1274 stackCount);
1275 databuf.appendChar(stackCount);
1276 for (int j=0; j<frame.stack.length;
1277 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
1278 if (debugstackmap) System.out.print(" stack[" + j + "]=");
1279 writeStackMapType(frame.stack[j]);
1280 }
1281 if (debugstackmap) System.out.println();
1282 }
1283 break;
1284 case JSR202: {
1285 assert code.stackMapBuffer == null;
1286 for (int i=0; i<nframes; i++) {
1287 if (debugstackmap) System.out.print(" " + i + ":");
1288 StackMapTableFrame frame = code.stackMapTableBuffer[i];
1289 frame.write(this);
1290 if (debugstackmap) System.out.println();
1291 }
1292 break;
1293 }
1294 default:
1295 throw new AssertionError("Unexpected stackmap format value");
1296 }
1297 }
1299 //where
1300 void writeStackMapType(Type t) {
1301 if (t == null) {
1302 if (debugstackmap) System.out.print("empty");
1303 databuf.appendByte(0);
1304 }
1305 else switch(t.tag) {
1306 case BYTE:
1307 case CHAR:
1308 case SHORT:
1309 case INT:
1310 case BOOLEAN:
1311 if (debugstackmap) System.out.print("int");
1312 databuf.appendByte(1);
1313 break;
1314 case FLOAT:
1315 if (debugstackmap) System.out.print("float");
1316 databuf.appendByte(2);
1317 break;
1318 case DOUBLE:
1319 if (debugstackmap) System.out.print("double");
1320 databuf.appendByte(3);
1321 break;
1322 case LONG:
1323 if (debugstackmap) System.out.print("long");
1324 databuf.appendByte(4);
1325 break;
1326 case BOT: // null
1327 if (debugstackmap) System.out.print("null");
1328 databuf.appendByte(5);
1329 break;
1330 case CLASS:
1331 case ARRAY:
1332 if (debugstackmap) System.out.print("object(" + t + ")");
1333 databuf.appendByte(7);
1334 databuf.appendChar(pool.put(t));
1335 break;
1336 case TYPEVAR:
1337 if (debugstackmap) System.out.print("object(" + types.erasure(t).tsym + ")");
1338 databuf.appendByte(7);
1339 databuf.appendChar(pool.put(types.erasure(t).tsym));
1340 break;
1341 case UNINITIALIZED_THIS:
1342 if (debugstackmap) System.out.print("uninit_this");
1343 databuf.appendByte(6);
1344 break;
1345 case UNINITIALIZED_OBJECT:
1346 { UninitializedType uninitType = (UninitializedType)t;
1347 databuf.appendByte(8);
1348 if (debugstackmap) System.out.print("uninit_object@" + uninitType.offset);
1349 databuf.appendChar(uninitType.offset);
1350 }
1351 break;
1352 default:
1353 throw new AssertionError();
1354 }
1355 }
1357 /** An entry in the JSR202 StackMapTable */
1358 abstract static class StackMapTableFrame {
1359 abstract int getFrameType();
1361 void write(ClassWriter writer) {
1362 int frameType = getFrameType();
1363 writer.databuf.appendByte(frameType);
1364 if (writer.debugstackmap) System.out.print(" frame_type=" + frameType);
1365 }
1367 static class SameFrame extends StackMapTableFrame {
1368 final int offsetDelta;
1369 SameFrame(int offsetDelta) {
1370 this.offsetDelta = offsetDelta;
1371 }
1372 int getFrameType() {
1373 return (offsetDelta < SAME_FRAME_SIZE) ? offsetDelta : SAME_FRAME_EXTENDED;
1374 }
1375 @Override
1376 void write(ClassWriter writer) {
1377 super.write(writer);
1378 if (getFrameType() == SAME_FRAME_EXTENDED) {
1379 writer.databuf.appendChar(offsetDelta);
1380 if (writer.debugstackmap){
1381 System.out.print(" offset_delta=" + offsetDelta);
1382 }
1383 }
1384 }
1385 }
1387 static class SameLocals1StackItemFrame extends StackMapTableFrame {
1388 final int offsetDelta;
1389 final Type stack;
1390 SameLocals1StackItemFrame(int offsetDelta, Type stack) {
1391 this.offsetDelta = offsetDelta;
1392 this.stack = stack;
1393 }
1394 int getFrameType() {
1395 return (offsetDelta < SAME_FRAME_SIZE) ?
1396 (SAME_FRAME_SIZE + offsetDelta) :
1397 SAME_LOCALS_1_STACK_ITEM_EXTENDED;
1398 }
1399 @Override
1400 void write(ClassWriter writer) {
1401 super.write(writer);
1402 if (getFrameType() == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
1403 writer.databuf.appendChar(offsetDelta);
1404 if (writer.debugstackmap) {
1405 System.out.print(" offset_delta=" + offsetDelta);
1406 }
1407 }
1408 if (writer.debugstackmap) {
1409 System.out.print(" stack[" + 0 + "]=");
1410 }
1411 writer.writeStackMapType(stack);
1412 }
1413 }
1415 static class ChopFrame extends StackMapTableFrame {
1416 final int frameType;
1417 final int offsetDelta;
1418 ChopFrame(int frameType, int offsetDelta) {
1419 this.frameType = frameType;
1420 this.offsetDelta = offsetDelta;
1421 }
1422 int getFrameType() { return frameType; }
1423 @Override
1424 void write(ClassWriter writer) {
1425 super.write(writer);
1426 writer.databuf.appendChar(offsetDelta);
1427 if (writer.debugstackmap) {
1428 System.out.print(" offset_delta=" + offsetDelta);
1429 }
1430 }
1431 }
1433 static class AppendFrame extends StackMapTableFrame {
1434 final int frameType;
1435 final int offsetDelta;
1436 final Type[] locals;
1437 AppendFrame(int frameType, int offsetDelta, Type[] locals) {
1438 this.frameType = frameType;
1439 this.offsetDelta = offsetDelta;
1440 this.locals = locals;
1441 }
1442 int getFrameType() { return frameType; }
1443 @Override
1444 void write(ClassWriter writer) {
1445 super.write(writer);
1446 writer.databuf.appendChar(offsetDelta);
1447 if (writer.debugstackmap) {
1448 System.out.print(" offset_delta=" + offsetDelta);
1449 }
1450 for (int i=0; i<locals.length; i++) {
1451 if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
1452 writer.writeStackMapType(locals[i]);
1453 }
1454 }
1455 }
1457 static class FullFrame extends StackMapTableFrame {
1458 final int offsetDelta;
1459 final Type[] locals;
1460 final Type[] stack;
1461 FullFrame(int offsetDelta, Type[] locals, Type[] stack) {
1462 this.offsetDelta = offsetDelta;
1463 this.locals = locals;
1464 this.stack = stack;
1465 }
1466 int getFrameType() { return FULL_FRAME; }
1467 @Override
1468 void write(ClassWriter writer) {
1469 super.write(writer);
1470 writer.databuf.appendChar(offsetDelta);
1471 writer.databuf.appendChar(locals.length);
1472 if (writer.debugstackmap) {
1473 System.out.print(" offset_delta=" + offsetDelta);
1474 System.out.print(" nlocals=" + locals.length);
1475 }
1476 for (int i=0; i<locals.length; i++) {
1477 if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
1478 writer.writeStackMapType(locals[i]);
1479 }
1481 writer.databuf.appendChar(stack.length);
1482 if (writer.debugstackmap) { System.out.print(" nstack=" + stack.length); }
1483 for (int i=0; i<stack.length; i++) {
1484 if (writer.debugstackmap) System.out.print(" stack[" + i + "]=");
1485 writer.writeStackMapType(stack[i]);
1486 }
1487 }
1488 }
1490 /** Compare this frame with the previous frame and produce
1491 * an entry of compressed stack map frame. */
1492 static StackMapTableFrame getInstance(Code.StackMapFrame this_frame,
1493 int prev_pc,
1494 Type[] prev_locals,
1495 Types types) {
1496 Type[] locals = this_frame.locals;
1497 Type[] stack = this_frame.stack;
1498 int offset_delta = this_frame.pc - prev_pc - 1;
1499 if (stack.length == 1) {
1500 if (locals.length == prev_locals.length
1501 && compare(prev_locals, locals, types) == 0) {
1502 return new SameLocals1StackItemFrame(offset_delta, stack[0]);
1503 }
1504 } else if (stack.length == 0) {
1505 int diff_length = compare(prev_locals, locals, types);
1506 if (diff_length == 0) {
1507 return new SameFrame(offset_delta);
1508 } else if (-MAX_LOCAL_LENGTH_DIFF < diff_length && diff_length < 0) {
1509 // APPEND
1510 Type[] local_diff = new Type[-diff_length];
1511 for (int i=prev_locals.length, j=0; i<locals.length; i++,j++) {
1512 local_diff[j] = locals[i];
1513 }
1514 return new AppendFrame(SAME_FRAME_EXTENDED - diff_length,
1515 offset_delta,
1516 local_diff);
1517 } else if (0 < diff_length && diff_length < MAX_LOCAL_LENGTH_DIFF) {
1518 // CHOP
1519 return new ChopFrame(SAME_FRAME_EXTENDED - diff_length,
1520 offset_delta);
1521 }
1522 }
1523 // FULL_FRAME
1524 return new FullFrame(offset_delta, locals, stack);
1525 }
1527 static boolean isInt(Type t) {
1528 return (t.tag < TypeTags.INT || t.tag == TypeTags.BOOLEAN);
1529 }
1531 static boolean isSameType(Type t1, Type t2, Types types) {
1532 if (t1 == null) { return t2 == null; }
1533 if (t2 == null) { return false; }
1535 if (isInt(t1) && isInt(t2)) { return true; }
1537 if (t1.tag == UNINITIALIZED_THIS) {
1538 return t2.tag == UNINITIALIZED_THIS;
1539 } else if (t1.tag == UNINITIALIZED_OBJECT) {
1540 if (t2.tag == UNINITIALIZED_OBJECT) {
1541 return ((UninitializedType)t1).offset == ((UninitializedType)t2).offset;
1542 } else {
1543 return false;
1544 }
1545 } else if (t2.tag == UNINITIALIZED_THIS || t2.tag == UNINITIALIZED_OBJECT) {
1546 return false;
1547 }
1549 return types.isSameType(t1, t2);
1550 }
1552 static int compare(Type[] arr1, Type[] arr2, Types types) {
1553 int diff_length = arr1.length - arr2.length;
1554 if (diff_length > MAX_LOCAL_LENGTH_DIFF || diff_length < -MAX_LOCAL_LENGTH_DIFF) {
1555 return Integer.MAX_VALUE;
1556 }
1557 int len = (diff_length > 0) ? arr2.length : arr1.length;
1558 for (int i=0; i<len; i++) {
1559 if (!isSameType(arr1[i], arr2[i], types)) {
1560 return Integer.MAX_VALUE;
1561 }
1562 }
1563 return diff_length;
1564 }
1565 }
1567 void writeFields(Scope.Entry e) {
1568 // process them in reverse sibling order;
1569 // i.e., process them in declaration order.
1570 List<VarSymbol> vars = List.nil();
1571 for (Scope.Entry i = e; i != null; i = i.sibling) {
1572 if (i.sym.kind == VAR) vars = vars.prepend((VarSymbol)i.sym);
1573 }
1574 while (vars.nonEmpty()) {
1575 writeField(vars.head);
1576 vars = vars.tail;
1577 }
1578 }
1580 void writeMethods(Scope.Entry e) {
1581 List<MethodSymbol> methods = List.nil();
1582 for (Scope.Entry i = e; i != null; i = i.sibling) {
1583 if (i.sym.kind == MTH && (i.sym.flags() & HYPOTHETICAL) == 0)
1584 methods = methods.prepend((MethodSymbol)i.sym);
1585 }
1586 while (methods.nonEmpty()) {
1587 writeMethod(methods.head);
1588 methods = methods.tail;
1589 }
1590 }
1592 /** Emit a class file for a given class.
1593 * @param c The class from which a class file is generated.
1594 */
1595 public JavaFileObject writeClass(ClassSymbol c)
1596 throws IOException, PoolOverflow, StringOverflow
1597 {
1598 JavaFileObject outFile
1599 = fileManager.getJavaFileForOutput(CLASS_OUTPUT,
1600 c.flatname.toString(),
1601 JavaFileObject.Kind.CLASS,
1602 c.sourcefile);
1603 OutputStream out = outFile.openOutputStream();
1604 try {
1605 writeClassFile(out, c);
1606 if (verbose)
1607 log.errWriter.println(Log.getLocalizedString("verbose.wrote.file", outFile));
1608 out.close();
1609 out = null;
1610 } finally {
1611 if (out != null) {
1612 // if we are propogating an exception, delete the file
1613 out.close();
1614 outFile.delete();
1615 outFile = null;
1616 }
1617 }
1618 return outFile; // may be null if write failed
1619 }
1621 /** Write class `c' to outstream `out'.
1622 */
1623 public void writeClassFile(OutputStream out, ClassSymbol c)
1624 throws IOException, PoolOverflow, StringOverflow {
1625 assert (c.flags() & COMPOUND) == 0;
1626 databuf.reset();
1627 poolbuf.reset();
1628 sigbuf.reset();
1629 pool = c.pool;
1630 innerClasses = null;
1631 innerClassesQueue = null;
1633 Type supertype = types.supertype(c.type);
1634 List<Type> interfaces = types.interfaces(c.type);
1635 List<Type> typarams = c.type.getTypeArguments();
1637 int flags = adjustFlags(c.flags());
1638 if ((flags & PROTECTED) != 0) flags |= PUBLIC;
1639 flags = flags & ClassFlags & ~STRICTFP;
1640 if ((flags & INTERFACE) == 0) flags |= ACC_SUPER;
1641 if (c.isInner() && c.name.isEmpty()) flags &= ~FINAL;
1642 if (dumpClassModifiers) {
1643 log.errWriter.println();
1644 log.errWriter.println("CLASSFILE " + c.getQualifiedName());
1645 log.errWriter.println("---" + flagNames(flags));
1646 }
1647 databuf.appendChar(flags);
1649 databuf.appendChar(pool.put(c));
1650 databuf.appendChar(supertype.tag == CLASS ? pool.put(supertype.tsym) : 0);
1651 databuf.appendChar(interfaces.length());
1652 for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
1653 databuf.appendChar(pool.put(l.head.tsym));
1654 int fieldsCount = 0;
1655 int methodsCount = 0;
1656 for (Scope.Entry e = c.members().elems; e != null; e = e.sibling) {
1657 switch (e.sym.kind) {
1658 case VAR: fieldsCount++; break;
1659 case MTH: if ((e.sym.flags() & HYPOTHETICAL) == 0) methodsCount++;
1660 break;
1661 case TYP: enterInner((ClassSymbol)e.sym); break;
1662 default : assert false;
1663 }
1664 }
1665 databuf.appendChar(fieldsCount);
1666 writeFields(c.members().elems);
1667 databuf.appendChar(methodsCount);
1668 writeMethods(c.members().elems);
1670 int acountIdx = beginAttrs();
1671 int acount = 0;
1673 boolean sigReq =
1674 typarams.length() != 0 || supertype.allparams().length() != 0;
1675 for (List<Type> l = interfaces; !sigReq && l.nonEmpty(); l = l.tail)
1676 sigReq = l.head.allparams().length() != 0;
1677 if (sigReq) {
1678 assert source.allowGenerics();
1679 int alenIdx = writeAttr(names.Signature);
1680 if (typarams.length() != 0) assembleParamsSig(typarams);
1681 assembleSig(supertype);
1682 for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
1683 assembleSig(l.head);
1684 databuf.appendChar(pool.put(sigbuf.toName(names)));
1685 sigbuf.reset();
1686 endAttr(alenIdx);
1687 acount++;
1688 }
1690 if (c.sourcefile != null && emitSourceFile) {
1691 int alenIdx = writeAttr(names.SourceFile);
1692 // WHM 6/29/1999: Strip file path prefix. We do it here at
1693 // the last possible moment because the sourcefile may be used
1694 // elsewhere in error diagnostics. Fixes 4241573.
1695 //databuf.appendChar(c.pool.put(c.sourcefile));
1696 String simpleName = BaseFileObject.getSimpleName(c.sourcefile);
1697 databuf.appendChar(c.pool.put(names.fromString(simpleName)));
1698 endAttr(alenIdx);
1699 acount++;
1700 }
1702 if (genCrt) {
1703 // Append SourceID attribute
1704 int alenIdx = writeAttr(names.SourceID);
1705 databuf.appendChar(c.pool.put(names.fromString(Long.toString(getLastModified(c.sourcefile)))));
1706 endAttr(alenIdx);
1707 acount++;
1708 // Append CompilationID attribute
1709 alenIdx = writeAttr(names.CompilationID);
1710 databuf.appendChar(c.pool.put(names.fromString(Long.toString(System.currentTimeMillis()))));
1711 endAttr(alenIdx);
1712 acount++;
1713 }
1715 acount += writeFlagAttrs(c.flags());
1716 acount += writeJavaAnnotations(c.getAnnotationMirrors());
1717 acount += writeTypeAnnotations(c.typeAnnotations);
1718 acount += writeEnclosingMethodAttribute(c);
1720 poolbuf.appendInt(JAVA_MAGIC);
1721 poolbuf.appendChar(target.minorVersion);
1722 poolbuf.appendChar(target.majorVersion);
1724 writePool(c.pool);
1726 if (innerClasses != null) {
1727 writeInnerClasses();
1728 acount++;
1729 }
1730 endAttrs(acountIdx, acount);
1732 poolbuf.appendBytes(databuf.elems, 0, databuf.length);
1733 out.write(poolbuf.elems, 0, poolbuf.length);
1735 pool = c.pool = null; // to conserve space
1736 }
1738 int adjustFlags(final long flags) {
1739 int result = (int)flags;
1740 if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag())
1741 result &= ~SYNTHETIC;
1742 if ((flags & ENUM) != 0 && !target.useEnumFlag())
1743 result &= ~ENUM;
1744 if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag())
1745 result &= ~ANNOTATION;
1747 if ((flags & BRIDGE) != 0 && target.useBridgeFlag())
1748 result |= ACC_BRIDGE;
1749 if ((flags & VARARGS) != 0 && target.useVarargsFlag())
1750 result |= ACC_VARARGS;
1751 return result;
1752 }
1754 long getLastModified(FileObject filename) {
1755 long mod = 0;
1756 try {
1757 mod = filename.getLastModified();
1758 } catch (SecurityException e) {
1759 throw new AssertionError("CRT: couldn't get source file modification date: " + e.getMessage());
1760 }
1761 return mod;
1762 }
1763 }
