Tue, 25 Jun 2013 16:12:53 +0100
8017104: javac should have a class for primitive types that inherits from Type
Reviewed-by: jjg
1 /*
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.javac.jvm;
28 import java.io.*;
29 import java.util.LinkedHashMap;
30 import java.util.Map;
31 import java.util.Set;
32 import java.util.HashSet;
34 import javax.tools.JavaFileManager;
35 import javax.tools.FileObject;
36 import javax.tools.JavaFileObject;
38 import com.sun.tools.javac.code.*;
39 import com.sun.tools.javac.code.Attribute.RetentionPolicy;
40 import com.sun.tools.javac.code.Attribute.TypeCompound;
41 import com.sun.tools.javac.code.Symbol.*;
42 import com.sun.tools.javac.code.Type.*;
43 import com.sun.tools.javac.code.Types.UniqueType;
44 import com.sun.tools.javac.file.BaseFileObject;
45 import com.sun.tools.javac.jvm.Pool.DynamicMethod;
46 import com.sun.tools.javac.jvm.Pool.Method;
47 import com.sun.tools.javac.jvm.Pool.MethodHandle;
48 import com.sun.tools.javac.jvm.Pool.Variable;
49 import com.sun.tools.javac.util.*;
51 import static com.sun.tools.javac.code.Flags.*;
52 import static com.sun.tools.javac.code.Kinds.*;
53 import static com.sun.tools.javac.code.TypeTag.*;
54 import static com.sun.tools.javac.jvm.UninitializedType.*;
55 import static com.sun.tools.javac.main.Option.*;
56 import static javax.tools.StandardLocation.CLASS_OUTPUT;
59 /** This class provides operations to map an internal symbol table graph
60 * rooted in a ClassSymbol into a classfile.
61 *
62 * <p><b>This is NOT part of any supported API.
63 * If you write code that depends on this, you do so at your own risk.
64 * This code and its internal interfaces are subject to change or
65 * deletion without notice.</b>
66 */
67 public class ClassWriter extends ClassFile {
68 protected static final Context.Key<ClassWriter> classWriterKey =
69 new Context.Key<ClassWriter>();
71 private final Options options;
73 /** Switch: verbose output.
74 */
75 private boolean verbose;
77 /** Switch: scramble private field names.
78 */
79 private boolean scramble;
81 /** Switch: scramble all field names.
82 */
83 private boolean scrambleAll;
85 /** Switch: retrofit mode.
86 */
87 private boolean retrofit;
89 /** Switch: emit source file attribute.
90 */
91 private boolean emitSourceFile;
93 /** Switch: generate CharacterRangeTable attribute.
94 */
95 private boolean genCrt;
97 /** Switch: describe the generated stackmap.
98 */
99 boolean debugstackmap;
101 /**
102 * Target class version.
103 */
104 private Target target;
106 /**
107 * Source language version.
108 */
109 private Source source;
111 /** Type utilities. */
112 private Types types;
114 /** The initial sizes of the data and constant pool buffers.
115 * Sizes are increased when buffers get full.
116 */
117 static final int DATA_BUF_SIZE = 0x0fff0;
118 static final int POOL_BUF_SIZE = 0x1fff0;
120 /** An output buffer for member info.
121 */
122 ByteBuffer databuf = new ByteBuffer(DATA_BUF_SIZE);
124 /** An output buffer for the constant pool.
125 */
126 ByteBuffer poolbuf = new ByteBuffer(POOL_BUF_SIZE);
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 bootstrap methods to be written in the corresponding class attribute
142 * (one for each invokedynamic)
143 */
144 Map<DynamicMethod, MethodHandle> bootstrapMethods;
146 /** The log to use for verbose output.
147 */
148 private final Log log;
150 /** The name table. */
151 private final Names names;
153 /** Access to files. */
154 private final JavaFileManager fileManager;
156 /** Sole signature generator */
157 private final CWSignatureGenerator signatureGen;
159 /** The tags and constants used in compressed stackmap. */
160 static final int SAME_FRAME_SIZE = 64;
161 static final int SAME_LOCALS_1_STACK_ITEM_EXTENDED = 247;
162 static final int SAME_FRAME_EXTENDED = 251;
163 static final int FULL_FRAME = 255;
164 static final int MAX_LOCAL_LENGTH_DIFF = 4;
166 /** Get the ClassWriter instance for this context. */
167 public static ClassWriter instance(Context context) {
168 ClassWriter instance = context.get(classWriterKey);
169 if (instance == null)
170 instance = new ClassWriter(context);
171 return instance;
172 }
174 /** Construct a class writer, given an options table.
175 */
176 protected ClassWriter(Context context) {
177 context.put(classWriterKey, this);
179 log = Log.instance(context);
180 names = Names.instance(context);
181 options = Options.instance(context);
182 target = Target.instance(context);
183 source = Source.instance(context);
184 types = Types.instance(context);
185 fileManager = context.get(JavaFileManager.class);
186 signatureGen = new CWSignatureGenerator(types);
188 verbose = options.isSet(VERBOSE);
189 scramble = options.isSet("-scramble");
190 scrambleAll = options.isSet("-scrambleAll");
191 retrofit = options.isSet("-retrofit");
192 genCrt = options.isSet(XJCOV);
193 debugstackmap = options.isSet("debugstackmap");
195 emitSourceFile = options.isUnset(G_CUSTOM) ||
196 options.isSet(G_CUSTOM, "source");
198 String dumpModFlags = options.get("dumpmodifiers");
199 dumpClassModifiers =
200 (dumpModFlags != null && dumpModFlags.indexOf('c') != -1);
201 dumpFieldModifiers =
202 (dumpModFlags != null && dumpModFlags.indexOf('f') != -1);
203 dumpInnerClassModifiers =
204 (dumpModFlags != null && dumpModFlags.indexOf('i') != -1);
205 dumpMethodModifiers =
206 (dumpModFlags != null && dumpModFlags.indexOf('m') != -1);
207 }
209 /******************************************************************
210 * Diagnostics: dump generated class names and modifiers
211 ******************************************************************/
213 /** Value of option 'dumpmodifiers' is a string
214 * indicating which modifiers should be dumped for debugging:
215 * 'c' -- classes
216 * 'f' -- fields
217 * 'i' -- innerclass attributes
218 * 'm' -- methods
219 * For example, to dump everything:
220 * javac -XDdumpmodifiers=cifm MyProg.java
221 */
222 private final boolean dumpClassModifiers; // -XDdumpmodifiers=c
223 private final boolean dumpFieldModifiers; // -XDdumpmodifiers=f
224 private final boolean dumpInnerClassModifiers; // -XDdumpmodifiers=i
225 private final boolean dumpMethodModifiers; // -XDdumpmodifiers=m
228 /** Return flags as a string, separated by " ".
229 */
230 public static String flagNames(long flags) {
231 StringBuilder sbuf = new StringBuilder();
232 int i = 0;
233 long f = flags & StandardFlags;
234 while (f != 0) {
235 if ((f & 1) != 0) {
236 sbuf.append(" ");
237 sbuf.append(flagName[i]);
238 }
239 f = f >> 1;
240 i++;
241 }
242 return sbuf.toString();
243 }
244 //where
245 private final static String[] flagName = {
246 "PUBLIC", "PRIVATE", "PROTECTED", "STATIC", "FINAL",
247 "SUPER", "VOLATILE", "TRANSIENT", "NATIVE", "INTERFACE",
248 "ABSTRACT", "STRICTFP"};
250 /******************************************************************
251 * Output routines
252 ******************************************************************/
254 /** Write a character into given byte buffer;
255 * byte buffer will not be grown.
256 */
257 void putChar(ByteBuffer buf, int op, int x) {
258 buf.elems[op ] = (byte)((x >> 8) & 0xFF);
259 buf.elems[op+1] = (byte)((x ) & 0xFF);
260 }
262 /** Write an integer into given byte buffer;
263 * byte buffer will not be grown.
264 */
265 void putInt(ByteBuffer buf, int adr, int x) {
266 buf.elems[adr ] = (byte)((x >> 24) & 0xFF);
267 buf.elems[adr+1] = (byte)((x >> 16) & 0xFF);
268 buf.elems[adr+2] = (byte)((x >> 8) & 0xFF);
269 buf.elems[adr+3] = (byte)((x ) & 0xFF);
270 }
272 /**
273 * Signature Generation
274 */
275 private class CWSignatureGenerator extends Types.SignatureGenerator {
277 /**
278 * An output buffer for type signatures.
279 */
280 ByteBuffer sigbuf = new ByteBuffer();
282 CWSignatureGenerator(Types types) {
283 super(types);
284 }
286 /**
287 * Assemble signature of given type in string buffer.
288 * Check for uninitialized types before calling the general case.
289 */
290 @Override
291 public void assembleSig(Type type) {
292 type = type.unannotatedType();
293 switch (type.getTag()) {
294 case UNINITIALIZED_THIS:
295 case UNINITIALIZED_OBJECT:
296 // we don't yet have a spec for uninitialized types in the
297 // local variable table
298 assembleSig(types.erasure(((UninitializedType)type).qtype));
299 break;
300 default:
301 super.assembleSig(type);
302 }
303 }
305 @Override
306 protected void append(char ch) {
307 sigbuf.appendByte(ch);
308 }
310 @Override
311 protected void append(byte[] ba) {
312 sigbuf.appendBytes(ba);
313 }
315 @Override
316 protected void append(Name name) {
317 sigbuf.appendName(name);
318 }
320 @Override
321 protected void classReference(ClassSymbol c) {
322 enterInner(c);
323 }
325 private void reset() {
326 sigbuf.reset();
327 }
329 private Name toName() {
330 return sigbuf.toName(names);
331 }
333 private boolean isEmpty() {
334 return sigbuf.length == 0;
335 }
336 }
338 /**
339 * Return signature of given type
340 */
341 Name typeSig(Type type) {
342 Assert.check(signatureGen.isEmpty());
343 //- System.out.println(" ? " + type);
344 signatureGen.assembleSig(type);
345 Name n = signatureGen.toName();
346 signatureGen.reset();
347 //- System.out.println(" " + n);
348 return n;
349 }
351 /** Given a type t, return the extended class name of its erasure in
352 * external representation.
353 */
354 public Name xClassName(Type t) {
355 if (t.hasTag(CLASS)) {
356 return names.fromUtf(externalize(t.tsym.flatName()));
357 } else if (t.hasTag(ARRAY)) {
358 return typeSig(types.erasure(t));
359 } else {
360 throw new AssertionError("xClassName");
361 }
362 }
364 /******************************************************************
365 * Writing the Constant Pool
366 ******************************************************************/
368 /** Thrown when the constant pool is over full.
369 */
370 public static class PoolOverflow extends Exception {
371 private static final long serialVersionUID = 0;
372 public PoolOverflow() {}
373 }
374 public static class StringOverflow extends Exception {
375 private static final long serialVersionUID = 0;
376 public final String value;
377 public StringOverflow(String s) {
378 value = s;
379 }
380 }
382 /** Write constant pool to pool buffer.
383 * Note: during writing, constant pool
384 * might grow since some parts of constants still need to be entered.
385 */
386 void writePool(Pool pool) throws PoolOverflow, StringOverflow {
387 int poolCountIdx = poolbuf.length;
388 poolbuf.appendChar(0);
389 int i = 1;
390 while (i < pool.pp) {
391 Object value = pool.pool[i];
392 Assert.checkNonNull(value);
393 if (value instanceof Method || value instanceof Variable)
394 value = ((DelegatedSymbol)value).getUnderlyingSymbol();
396 if (value instanceof MethodSymbol) {
397 MethodSymbol m = (MethodSymbol)value;
398 if (!m.isDynamic()) {
399 poolbuf.appendByte((m.owner.flags() & INTERFACE) != 0
400 ? CONSTANT_InterfaceMethodref
401 : CONSTANT_Methodref);
402 poolbuf.appendChar(pool.put(m.owner));
403 poolbuf.appendChar(pool.put(nameType(m)));
404 } else {
405 //invokedynamic
406 DynamicMethodSymbol dynSym = (DynamicMethodSymbol)m;
407 MethodHandle handle = new MethodHandle(dynSym.bsmKind, dynSym.bsm, types);
408 DynamicMethod dynMeth = new DynamicMethod(dynSym, types);
409 bootstrapMethods.put(dynMeth, handle);
410 //init cp entries
411 pool.put(names.BootstrapMethods);
412 pool.put(handle);
413 for (Object staticArg : dynSym.staticArgs) {
414 pool.put(staticArg);
415 }
416 poolbuf.appendByte(CONSTANT_InvokeDynamic);
417 poolbuf.appendChar(bootstrapMethods.size() - 1);
418 poolbuf.appendChar(pool.put(nameType(dynSym)));
419 }
420 } else if (value instanceof VarSymbol) {
421 VarSymbol v = (VarSymbol)value;
422 poolbuf.appendByte(CONSTANT_Fieldref);
423 poolbuf.appendChar(pool.put(v.owner));
424 poolbuf.appendChar(pool.put(nameType(v)));
425 } else if (value instanceof Name) {
426 poolbuf.appendByte(CONSTANT_Utf8);
427 byte[] bs = ((Name)value).toUtf();
428 poolbuf.appendChar(bs.length);
429 poolbuf.appendBytes(bs, 0, bs.length);
430 if (bs.length > Pool.MAX_STRING_LENGTH)
431 throw new StringOverflow(value.toString());
432 } else if (value instanceof ClassSymbol) {
433 ClassSymbol c = (ClassSymbol)value;
434 if (c.owner.kind == TYP) pool.put(c.owner);
435 poolbuf.appendByte(CONSTANT_Class);
436 if (c.type.hasTag(ARRAY)) {
437 poolbuf.appendChar(pool.put(typeSig(c.type)));
438 } else {
439 poolbuf.appendChar(pool.put(names.fromUtf(externalize(c.flatname))));
440 enterInner(c);
441 }
442 } else if (value instanceof NameAndType) {
443 NameAndType nt = (NameAndType)value;
444 poolbuf.appendByte(CONSTANT_NameandType);
445 poolbuf.appendChar(pool.put(nt.name));
446 poolbuf.appendChar(pool.put(typeSig(nt.uniqueType.type)));
447 } else if (value instanceof Integer) {
448 poolbuf.appendByte(CONSTANT_Integer);
449 poolbuf.appendInt(((Integer)value).intValue());
450 } else if (value instanceof Long) {
451 poolbuf.appendByte(CONSTANT_Long);
452 poolbuf.appendLong(((Long)value).longValue());
453 i++;
454 } else if (value instanceof Float) {
455 poolbuf.appendByte(CONSTANT_Float);
456 poolbuf.appendFloat(((Float)value).floatValue());
457 } else if (value instanceof Double) {
458 poolbuf.appendByte(CONSTANT_Double);
459 poolbuf.appendDouble(((Double)value).doubleValue());
460 i++;
461 } else if (value instanceof String) {
462 poolbuf.appendByte(CONSTANT_String);
463 poolbuf.appendChar(pool.put(names.fromString((String)value)));
464 } else if (value instanceof UniqueType) {
465 Type type = ((UniqueType)value).type;
466 if (type instanceof MethodType) {
467 poolbuf.appendByte(CONSTANT_MethodType);
468 poolbuf.appendChar(pool.put(typeSig((MethodType)type)));
469 } else {
470 if (type.hasTag(CLASS)) enterInner((ClassSymbol)type.tsym);
471 poolbuf.appendByte(CONSTANT_Class);
472 poolbuf.appendChar(pool.put(xClassName(type)));
473 }
474 } else if (value instanceof MethodHandle) {
475 MethodHandle ref = (MethodHandle)value;
476 poolbuf.appendByte(CONSTANT_MethodHandle);
477 poolbuf.appendByte(ref.refKind);
478 poolbuf.appendChar(pool.put(ref.refSym));
479 } else {
480 Assert.error("writePool " + value);
481 }
482 i++;
483 }
484 if (pool.pp > Pool.MAX_ENTRIES)
485 throw new PoolOverflow();
486 putChar(poolbuf, poolCountIdx, pool.pp);
487 }
489 /** Given a field, return its name.
490 */
491 Name fieldName(Symbol sym) {
492 if (scramble && (sym.flags() & PRIVATE) != 0 ||
493 scrambleAll && (sym.flags() & (PROTECTED | PUBLIC)) == 0)
494 return names.fromString("_$" + sym.name.getIndex());
495 else
496 return sym.name;
497 }
499 /** Given a symbol, return its name-and-type.
500 */
501 NameAndType nameType(Symbol sym) {
502 return new NameAndType(fieldName(sym),
503 retrofit
504 ? sym.erasure(types)
505 : sym.externalType(types), types);
506 // if we retrofit, then the NameAndType has been read in as is
507 // and no change is necessary. If we compile normally, the
508 // NameAndType is generated from a symbol reference, and the
509 // adjustment of adding an additional this$n parameter needs to be made.
510 }
512 /******************************************************************
513 * Writing Attributes
514 ******************************************************************/
516 /** Write header for an attribute to data buffer and return
517 * position past attribute length index.
518 */
519 int writeAttr(Name attrName) {
520 databuf.appendChar(pool.put(attrName));
521 databuf.appendInt(0);
522 return databuf.length;
523 }
525 /** Fill in attribute length.
526 */
527 void endAttr(int index) {
528 putInt(databuf, index - 4, databuf.length - index);
529 }
531 /** Leave space for attribute count and return index for
532 * number of attributes field.
533 */
534 int beginAttrs() {
535 databuf.appendChar(0);
536 return databuf.length;
537 }
539 /** Fill in number of attributes.
540 */
541 void endAttrs(int index, int count) {
542 putChar(databuf, index - 2, count);
543 }
545 /** Write the EnclosingMethod attribute if needed.
546 * Returns the number of attributes written (0 or 1).
547 */
548 int writeEnclosingMethodAttribute(ClassSymbol c) {
549 if (!target.hasEnclosingMethodAttribute())
550 return 0;
551 return writeEnclosingMethodAttribute(names.EnclosingMethod, c);
552 }
554 /** Write the EnclosingMethod attribute with a specified name.
555 * Returns the number of attributes written (0 or 1).
556 */
557 protected int writeEnclosingMethodAttribute(Name attributeName, ClassSymbol c) {
558 if (c.owner.kind != MTH && // neither a local class
559 c.name != names.empty) // nor anonymous
560 return 0;
562 int alenIdx = writeAttr(attributeName);
563 ClassSymbol enclClass = c.owner.enclClass();
564 MethodSymbol enclMethod =
565 (c.owner.type == null // local to init block
566 || c.owner.kind != MTH) // or member init
567 ? null
568 : (MethodSymbol)c.owner;
569 databuf.appendChar(pool.put(enclClass));
570 databuf.appendChar(enclMethod == null ? 0 : pool.put(nameType(c.owner)));
571 endAttr(alenIdx);
572 return 1;
573 }
575 /** Write flag attributes; return number of attributes written.
576 */
577 int writeFlagAttrs(long flags) {
578 int acount = 0;
579 if ((flags & DEPRECATED) != 0) {
580 int alenIdx = writeAttr(names.Deprecated);
581 endAttr(alenIdx);
582 acount++;
583 }
584 if ((flags & ENUM) != 0 && !target.useEnumFlag()) {
585 int alenIdx = writeAttr(names.Enum);
586 endAttr(alenIdx);
587 acount++;
588 }
589 if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag()) {
590 int alenIdx = writeAttr(names.Synthetic);
591 endAttr(alenIdx);
592 acount++;
593 }
594 if ((flags & BRIDGE) != 0 && !target.useBridgeFlag()) {
595 int alenIdx = writeAttr(names.Bridge);
596 endAttr(alenIdx);
597 acount++;
598 }
599 if ((flags & VARARGS) != 0 && !target.useVarargsFlag()) {
600 int alenIdx = writeAttr(names.Varargs);
601 endAttr(alenIdx);
602 acount++;
603 }
604 if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag()) {
605 int alenIdx = writeAttr(names.Annotation);
606 endAttr(alenIdx);
607 acount++;
608 }
609 return acount;
610 }
612 /** Write member (field or method) attributes;
613 * return number of attributes written.
614 */
615 int writeMemberAttrs(Symbol sym) {
616 int acount = writeFlagAttrs(sym.flags());
617 long flags = sym.flags();
618 if (source.allowGenerics() &&
619 (flags & (SYNTHETIC|BRIDGE)) != SYNTHETIC &&
620 (flags & ANONCONSTR) == 0 &&
621 (!types.isSameType(sym.type, sym.erasure(types)) ||
622 signatureGen.hasTypeVar(sym.type.getThrownTypes()))) {
623 // note that a local class with captured variables
624 // will get a signature attribute
625 int alenIdx = writeAttr(names.Signature);
626 databuf.appendChar(pool.put(typeSig(sym.type)));
627 endAttr(alenIdx);
628 acount++;
629 }
630 acount += writeJavaAnnotations(sym.getRawAttributes());
631 acount += writeTypeAnnotations(sym.getRawTypeAttributes(), false);
632 return acount;
633 }
635 /**
636 * Write method parameter names attribute.
637 */
638 int writeMethodParametersAttr(MethodSymbol m) {
639 MethodType ty = m.externalType(types).asMethodType();
640 final int allparams = ty.argtypes.size();
641 if (m.params != null && allparams != 0) {
642 final int attrIndex = writeAttr(names.MethodParameters);
643 databuf.appendByte(allparams);
644 // Write extra parameters first
645 for (VarSymbol s : m.extraParams) {
646 final int flags =
647 ((int) s.flags() & (FINAL | SYNTHETIC | MANDATED)) |
648 ((int) m.flags() & SYNTHETIC);
649 databuf.appendChar(pool.put(s.name));
650 databuf.appendChar(flags);
651 }
652 // Now write the real parameters
653 for (VarSymbol s : m.params) {
654 final int flags =
655 ((int) s.flags() & (FINAL | SYNTHETIC | MANDATED)) |
656 ((int) m.flags() & SYNTHETIC);
657 databuf.appendChar(pool.put(s.name));
658 databuf.appendChar(flags);
659 }
660 endAttr(attrIndex);
661 return 1;
662 } else
663 return 0;
664 }
667 /** Write method parameter annotations;
668 * return number of attributes written.
669 */
670 int writeParameterAttrs(MethodSymbol m) {
671 boolean hasVisible = false;
672 boolean hasInvisible = false;
673 if (m.params != null) {
674 for (VarSymbol s : m.params) {
675 for (Attribute.Compound a : s.getRawAttributes()) {
676 switch (types.getRetention(a)) {
677 case SOURCE: break;
678 case CLASS: hasInvisible = true; break;
679 case RUNTIME: hasVisible = true; break;
680 default: ;// /* fail soft */ throw new AssertionError(vis);
681 }
682 }
683 }
684 }
686 int attrCount = 0;
687 if (hasVisible) {
688 int attrIndex = writeAttr(names.RuntimeVisibleParameterAnnotations);
689 databuf.appendByte(m.params.length());
690 for (VarSymbol s : m.params) {
691 ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();
692 for (Attribute.Compound a : s.getRawAttributes())
693 if (types.getRetention(a) == RetentionPolicy.RUNTIME)
694 buf.append(a);
695 databuf.appendChar(buf.length());
696 for (Attribute.Compound a : buf)
697 writeCompoundAttribute(a);
698 }
699 endAttr(attrIndex);
700 attrCount++;
701 }
702 if (hasInvisible) {
703 int attrIndex = writeAttr(names.RuntimeInvisibleParameterAnnotations);
704 databuf.appendByte(m.params.length());
705 for (VarSymbol s : m.params) {
706 ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();
707 for (Attribute.Compound a : s.getRawAttributes())
708 if (types.getRetention(a) == RetentionPolicy.CLASS)
709 buf.append(a);
710 databuf.appendChar(buf.length());
711 for (Attribute.Compound a : buf)
712 writeCompoundAttribute(a);
713 }
714 endAttr(attrIndex);
715 attrCount++;
716 }
717 return attrCount;
718 }
720 /**********************************************************************
721 * Writing Java-language annotations (aka metadata, attributes)
722 **********************************************************************/
724 /** Write Java-language annotations; return number of JVM
725 * attributes written (zero or one).
726 */
727 int writeJavaAnnotations(List<Attribute.Compound> attrs) {
728 if (attrs.isEmpty()) return 0;
729 ListBuffer<Attribute.Compound> visibles = new ListBuffer<Attribute.Compound>();
730 ListBuffer<Attribute.Compound> invisibles = new ListBuffer<Attribute.Compound>();
731 for (Attribute.Compound a : attrs) {
732 switch (types.getRetention(a)) {
733 case SOURCE: break;
734 case CLASS: invisibles.append(a); break;
735 case RUNTIME: visibles.append(a); break;
736 default: ;// /* fail soft */ throw new AssertionError(vis);
737 }
738 }
740 int attrCount = 0;
741 if (visibles.length() != 0) {
742 int attrIndex = writeAttr(names.RuntimeVisibleAnnotations);
743 databuf.appendChar(visibles.length());
744 for (Attribute.Compound a : visibles)
745 writeCompoundAttribute(a);
746 endAttr(attrIndex);
747 attrCount++;
748 }
749 if (invisibles.length() != 0) {
750 int attrIndex = writeAttr(names.RuntimeInvisibleAnnotations);
751 databuf.appendChar(invisibles.length());
752 for (Attribute.Compound a : invisibles)
753 writeCompoundAttribute(a);
754 endAttr(attrIndex);
755 attrCount++;
756 }
757 return attrCount;
758 }
760 int writeTypeAnnotations(List<Attribute.TypeCompound> typeAnnos, boolean inCode) {
761 if (typeAnnos.isEmpty()) return 0;
763 ListBuffer<Attribute.TypeCompound> visibles = ListBuffer.lb();
764 ListBuffer<Attribute.TypeCompound> invisibles = ListBuffer.lb();
766 for (Attribute.TypeCompound tc : typeAnnos) {
767 if (tc.hasUnknownPosition()) {
768 boolean fixed = tc.tryFixPosition();
770 // Could we fix it?
771 if (!fixed) {
772 // This happens for nested types like @A Outer. @B Inner.
773 // For method parameters we get the annotation twice! Once with
774 // a valid position, once unknown.
775 // TODO: find a cleaner solution.
776 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
777 pw.println("ClassWriter: Position UNKNOWN in type annotation: " + tc);
778 continue;
779 }
780 }
782 if (tc.position.type.isLocal() != inCode)
783 continue;
784 if (!tc.position.emitToClassfile())
785 continue;
786 switch (types.getRetention(tc)) {
787 case SOURCE: break;
788 case CLASS: invisibles.append(tc); break;
789 case RUNTIME: visibles.append(tc); break;
790 default: ;// /* fail soft */ throw new AssertionError(vis);
791 }
792 }
794 int attrCount = 0;
795 if (visibles.length() != 0) {
796 int attrIndex = writeAttr(names.RuntimeVisibleTypeAnnotations);
797 databuf.appendChar(visibles.length());
798 for (Attribute.TypeCompound p : visibles)
799 writeTypeAnnotation(p);
800 endAttr(attrIndex);
801 attrCount++;
802 }
804 if (invisibles.length() != 0) {
805 int attrIndex = writeAttr(names.RuntimeInvisibleTypeAnnotations);
806 databuf.appendChar(invisibles.length());
807 for (Attribute.TypeCompound p : invisibles)
808 writeTypeAnnotation(p);
809 endAttr(attrIndex);
810 attrCount++;
811 }
813 return attrCount;
814 }
816 /** A visitor to write an attribute including its leading
817 * single-character marker.
818 */
819 class AttributeWriter implements Attribute.Visitor {
820 public void visitConstant(Attribute.Constant _value) {
821 Object value = _value.value;
822 switch (_value.type.getTag()) {
823 case BYTE:
824 databuf.appendByte('B');
825 break;
826 case CHAR:
827 databuf.appendByte('C');
828 break;
829 case SHORT:
830 databuf.appendByte('S');
831 break;
832 case INT:
833 databuf.appendByte('I');
834 break;
835 case LONG:
836 databuf.appendByte('J');
837 break;
838 case FLOAT:
839 databuf.appendByte('F');
840 break;
841 case DOUBLE:
842 databuf.appendByte('D');
843 break;
844 case BOOLEAN:
845 databuf.appendByte('Z');
846 break;
847 case CLASS:
848 Assert.check(value instanceof String);
849 databuf.appendByte('s');
850 value = names.fromString(value.toString()); // CONSTANT_Utf8
851 break;
852 default:
853 throw new AssertionError(_value.type);
854 }
855 databuf.appendChar(pool.put(value));
856 }
857 public void visitEnum(Attribute.Enum e) {
858 databuf.appendByte('e');
859 databuf.appendChar(pool.put(typeSig(e.value.type)));
860 databuf.appendChar(pool.put(e.value.name));
861 }
862 public void visitClass(Attribute.Class clazz) {
863 databuf.appendByte('c');
864 databuf.appendChar(pool.put(typeSig(clazz.classType)));
865 }
866 public void visitCompound(Attribute.Compound compound) {
867 databuf.appendByte('@');
868 writeCompoundAttribute(compound);
869 }
870 public void visitError(Attribute.Error x) {
871 throw new AssertionError(x);
872 }
873 public void visitArray(Attribute.Array array) {
874 databuf.appendByte('[');
875 databuf.appendChar(array.values.length);
876 for (Attribute a : array.values) {
877 a.accept(this);
878 }
879 }
880 }
881 AttributeWriter awriter = new AttributeWriter();
883 /** Write a compound attribute excluding the '@' marker. */
884 void writeCompoundAttribute(Attribute.Compound c) {
885 databuf.appendChar(pool.put(typeSig(c.type)));
886 databuf.appendChar(c.values.length());
887 for (Pair<Symbol.MethodSymbol,Attribute> p : c.values) {
888 databuf.appendChar(pool.put(p.fst.name));
889 p.snd.accept(awriter);
890 }
891 }
893 void writeTypeAnnotation(Attribute.TypeCompound c) {
894 writePosition(c.position);
895 writeCompoundAttribute(c);
896 }
898 void writePosition(TypeAnnotationPosition p) {
899 databuf.appendByte(p.type.targetTypeValue()); // TargetType tag is a byte
900 switch (p.type) {
901 // instanceof
902 case INSTANCEOF:
903 // new expression
904 case NEW:
905 // constructor/method reference receiver
906 case CONSTRUCTOR_REFERENCE:
907 case METHOD_REFERENCE:
908 databuf.appendChar(p.offset);
909 break;
910 // local variable
911 case LOCAL_VARIABLE:
912 // resource variable
913 case RESOURCE_VARIABLE:
914 databuf.appendChar(p.lvarOffset.length); // for table length
915 for (int i = 0; i < p.lvarOffset.length; ++i) {
916 databuf.appendChar(p.lvarOffset[i]);
917 databuf.appendChar(p.lvarLength[i]);
918 databuf.appendChar(p.lvarIndex[i]);
919 }
920 break;
921 // exception parameter
922 case EXCEPTION_PARAMETER:
923 databuf.appendChar(p.exception_index);
924 break;
925 // method receiver
926 case METHOD_RECEIVER:
927 // Do nothing
928 break;
929 // type parameter
930 case CLASS_TYPE_PARAMETER:
931 case METHOD_TYPE_PARAMETER:
932 databuf.appendByte(p.parameter_index);
933 break;
934 // type parameter bound
935 case CLASS_TYPE_PARAMETER_BOUND:
936 case METHOD_TYPE_PARAMETER_BOUND:
937 databuf.appendByte(p.parameter_index);
938 databuf.appendByte(p.bound_index);
939 break;
940 // class extends or implements clause
941 case CLASS_EXTENDS:
942 databuf.appendChar(p.type_index);
943 break;
944 // throws
945 case THROWS:
946 databuf.appendChar(p.type_index);
947 break;
948 // method parameter
949 case METHOD_FORMAL_PARAMETER:
950 databuf.appendByte(p.parameter_index);
951 break;
952 // type cast
953 case CAST:
954 // method/constructor/reference type argument
955 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
956 case METHOD_INVOCATION_TYPE_ARGUMENT:
957 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
958 case METHOD_REFERENCE_TYPE_ARGUMENT:
959 databuf.appendChar(p.offset);
960 databuf.appendByte(p.type_index);
961 break;
962 // We don't need to worry about these
963 case METHOD_RETURN:
964 case FIELD:
965 break;
966 case UNKNOWN:
967 throw new AssertionError("jvm.ClassWriter: UNKNOWN target type should never occur!");
968 default:
969 throw new AssertionError("jvm.ClassWriter: Unknown target type for position: " + p);
970 }
972 { // Append location data for generics/arrays.
973 databuf.appendByte(p.location.size());
974 java.util.List<Integer> loc = TypeAnnotationPosition.getBinaryFromTypePath(p.location);
975 for (int i : loc)
976 databuf.appendByte((byte)i);
977 }
978 }
980 /**********************************************************************
981 * Writing Objects
982 **********************************************************************/
984 /** Enter an inner class into the `innerClasses' set/queue.
985 */
986 void enterInner(ClassSymbol c) {
987 if (c.type.isCompound()) {
988 throw new AssertionError("Unexpected intersection type: " + c.type);
989 }
990 try {
991 c.complete();
992 } catch (CompletionFailure ex) {
993 System.err.println("error: " + c + ": " + ex.getMessage());
994 throw ex;
995 }
996 if (!c.type.hasTag(CLASS)) return; // arrays
997 if (pool != null && // pool might be null if called from xClassName
998 c.owner.enclClass() != null &&
999 (innerClasses == null || !innerClasses.contains(c))) {
1000 // log.errWriter.println("enter inner " + c);//DEBUG
1001 enterInner(c.owner.enclClass());
1002 pool.put(c);
1003 if (c.name != names.empty)
1004 pool.put(c.name);
1005 if (innerClasses == null) {
1006 innerClasses = new HashSet<ClassSymbol>();
1007 innerClassesQueue = new ListBuffer<ClassSymbol>();
1008 pool.put(names.InnerClasses);
1009 }
1010 innerClasses.add(c);
1011 innerClassesQueue.append(c);
1012 }
1013 }
1015 /** Write "inner classes" attribute.
1016 */
1017 void writeInnerClasses() {
1018 int alenIdx = writeAttr(names.InnerClasses);
1019 databuf.appendChar(innerClassesQueue.length());
1020 for (List<ClassSymbol> l = innerClassesQueue.toList();
1021 l.nonEmpty();
1022 l = l.tail) {
1023 ClassSymbol inner = l.head;
1024 char flags = (char) adjustFlags(inner.flags_field);
1025 if ((flags & INTERFACE) != 0) flags |= ABSTRACT; // Interfaces are always ABSTRACT
1026 if (inner.name.isEmpty()) flags &= ~FINAL; // Anonymous class: unset FINAL flag
1027 flags &= ~STRICTFP; //inner classes should not have the strictfp flag set.
1028 if (dumpInnerClassModifiers) {
1029 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
1030 pw.println("INNERCLASS " + inner.name);
1031 pw.println("---" + flagNames(flags));
1032 }
1033 databuf.appendChar(pool.get(inner));
1034 databuf.appendChar(
1035 inner.owner.kind == TYP ? pool.get(inner.owner) : 0);
1036 databuf.appendChar(
1037 !inner.name.isEmpty() ? pool.get(inner.name) : 0);
1038 databuf.appendChar(flags);
1039 }
1040 endAttr(alenIdx);
1041 }
1043 /** Write "bootstrapMethods" attribute.
1044 */
1045 void writeBootstrapMethods() {
1046 int alenIdx = writeAttr(names.BootstrapMethods);
1047 databuf.appendChar(bootstrapMethods.size());
1048 for (Map.Entry<DynamicMethod, MethodHandle> entry : bootstrapMethods.entrySet()) {
1049 DynamicMethod dmeth = entry.getKey();
1050 DynamicMethodSymbol dsym = (DynamicMethodSymbol)dmeth.baseSymbol();
1051 //write BSM handle
1052 databuf.appendChar(pool.get(entry.getValue()));
1053 //write static args length
1054 databuf.appendChar(dsym.staticArgs.length);
1055 //write static args array
1056 Object[] uniqueArgs = dmeth.uniqueStaticArgs;
1057 for (Object o : uniqueArgs) {
1058 databuf.appendChar(pool.get(o));
1059 }
1060 }
1061 endAttr(alenIdx);
1062 }
1064 /** Write field symbol, entering all references into constant pool.
1065 */
1066 void writeField(VarSymbol v) {
1067 int flags = adjustFlags(v.flags());
1068 databuf.appendChar(flags);
1069 if (dumpFieldModifiers) {
1070 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
1071 pw.println("FIELD " + fieldName(v));
1072 pw.println("---" + flagNames(v.flags()));
1073 }
1074 databuf.appendChar(pool.put(fieldName(v)));
1075 databuf.appendChar(pool.put(typeSig(v.erasure(types))));
1076 int acountIdx = beginAttrs();
1077 int acount = 0;
1078 if (v.getConstValue() != null) {
1079 int alenIdx = writeAttr(names.ConstantValue);
1080 databuf.appendChar(pool.put(v.getConstValue()));
1081 endAttr(alenIdx);
1082 acount++;
1083 }
1084 acount += writeMemberAttrs(v);
1085 endAttrs(acountIdx, acount);
1086 }
1088 /** Write method symbol, entering all references into constant pool.
1089 */
1090 void writeMethod(MethodSymbol m) {
1091 int flags = adjustFlags(m.flags());
1092 databuf.appendChar(flags);
1093 if (dumpMethodModifiers) {
1094 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
1095 pw.println("METHOD " + fieldName(m));
1096 pw.println("---" + flagNames(m.flags()));
1097 }
1098 databuf.appendChar(pool.put(fieldName(m)));
1099 databuf.appendChar(pool.put(typeSig(m.externalType(types))));
1100 int acountIdx = beginAttrs();
1101 int acount = 0;
1102 if (m.code != null) {
1103 int alenIdx = writeAttr(names.Code);
1104 writeCode(m.code);
1105 m.code = null; // to conserve space
1106 endAttr(alenIdx);
1107 acount++;
1108 }
1109 List<Type> thrown = m.erasure(types).getThrownTypes();
1110 if (thrown.nonEmpty()) {
1111 int alenIdx = writeAttr(names.Exceptions);
1112 databuf.appendChar(thrown.length());
1113 for (List<Type> l = thrown; l.nonEmpty(); l = l.tail)
1114 databuf.appendChar(pool.put(l.head.tsym));
1115 endAttr(alenIdx);
1116 acount++;
1117 }
1118 if (m.defaultValue != null) {
1119 int alenIdx = writeAttr(names.AnnotationDefault);
1120 m.defaultValue.accept(awriter);
1121 endAttr(alenIdx);
1122 acount++;
1123 }
1124 if (options.isSet(PARAMETERS))
1125 acount += writeMethodParametersAttr(m);
1126 acount += writeMemberAttrs(m);
1127 acount += writeParameterAttrs(m);
1128 endAttrs(acountIdx, acount);
1129 }
1131 /** Write code attribute of method.
1132 */
1133 void writeCode(Code code) {
1134 databuf.appendChar(code.max_stack);
1135 databuf.appendChar(code.max_locals);
1136 databuf.appendInt(code.cp);
1137 databuf.appendBytes(code.code, 0, code.cp);
1138 databuf.appendChar(code.catchInfo.length());
1139 for (List<char[]> l = code.catchInfo.toList();
1140 l.nonEmpty();
1141 l = l.tail) {
1142 for (int i = 0; i < l.head.length; i++)
1143 databuf.appendChar(l.head[i]);
1144 }
1145 int acountIdx = beginAttrs();
1146 int acount = 0;
1148 if (code.lineInfo.nonEmpty()) {
1149 int alenIdx = writeAttr(names.LineNumberTable);
1150 databuf.appendChar(code.lineInfo.length());
1151 for (List<char[]> l = code.lineInfo.reverse();
1152 l.nonEmpty();
1153 l = l.tail)
1154 for (int i = 0; i < l.head.length; i++)
1155 databuf.appendChar(l.head[i]);
1156 endAttr(alenIdx);
1157 acount++;
1158 }
1160 if (genCrt && (code.crt != null)) {
1161 CRTable crt = code.crt;
1162 int alenIdx = writeAttr(names.CharacterRangeTable);
1163 int crtIdx = beginAttrs();
1164 int crtEntries = crt.writeCRT(databuf, code.lineMap, log);
1165 endAttrs(crtIdx, crtEntries);
1166 endAttr(alenIdx);
1167 acount++;
1168 }
1170 // counter for number of generic local variables
1171 int nGenericVars = 0;
1173 if (code.varBufferSize > 0) {
1174 int alenIdx = writeAttr(names.LocalVariableTable);
1175 databuf.appendChar(code.varBufferSize);
1177 for (int i=0; i<code.varBufferSize; i++) {
1178 Code.LocalVar var = code.varBuffer[i];
1180 // write variable info
1181 Assert.check(var.start_pc >= 0
1182 && var.start_pc <= code.cp);
1183 databuf.appendChar(var.start_pc);
1184 Assert.check(var.length >= 0
1185 && (var.start_pc + var.length) <= code.cp);
1186 databuf.appendChar(var.length);
1187 VarSymbol sym = var.sym;
1188 databuf.appendChar(pool.put(sym.name));
1189 Type vartype = sym.erasure(types);
1190 if (needsLocalVariableTypeEntry(sym.type))
1191 nGenericVars++;
1192 databuf.appendChar(pool.put(typeSig(vartype)));
1193 databuf.appendChar(var.reg);
1194 }
1195 endAttr(alenIdx);
1196 acount++;
1197 }
1199 if (nGenericVars > 0) {
1200 int alenIdx = writeAttr(names.LocalVariableTypeTable);
1201 databuf.appendChar(nGenericVars);
1202 int count = 0;
1204 for (int i=0; i<code.varBufferSize; i++) {
1205 Code.LocalVar var = code.varBuffer[i];
1206 VarSymbol sym = var.sym;
1207 if (!needsLocalVariableTypeEntry(sym.type))
1208 continue;
1209 count++;
1210 // write variable info
1211 databuf.appendChar(var.start_pc);
1212 databuf.appendChar(var.length);
1213 databuf.appendChar(pool.put(sym.name));
1214 databuf.appendChar(pool.put(typeSig(sym.type)));
1215 databuf.appendChar(var.reg);
1216 }
1217 Assert.check(count == nGenericVars);
1218 endAttr(alenIdx);
1219 acount++;
1220 }
1222 if (code.stackMapBufferSize > 0) {
1223 if (debugstackmap) System.out.println("Stack map for " + code.meth);
1224 int alenIdx = writeAttr(code.stackMap.getAttributeName(names));
1225 writeStackMap(code);
1226 endAttr(alenIdx);
1227 acount++;
1228 }
1230 acount += writeTypeAnnotations(code.meth.getRawTypeAttributes(), true);
1232 endAttrs(acountIdx, acount);
1233 }
1234 //where
1235 private boolean needsLocalVariableTypeEntry(Type t) {
1236 //a local variable needs a type-entry if its type T is generic
1237 //(i.e. |T| != T) and if it's not an intersection type (not supported
1238 //in signature attribute grammar)
1239 return (!types.isSameType(t, types.erasure(t)) &&
1240 !t.isCompound());
1241 }
1243 void writeStackMap(Code code) {
1244 int nframes = code.stackMapBufferSize;
1245 if (debugstackmap) System.out.println(" nframes = " + nframes);
1246 databuf.appendChar(nframes);
1248 switch (code.stackMap) {
1249 case CLDC:
1250 for (int i=0; i<nframes; i++) {
1251 if (debugstackmap) System.out.print(" " + i + ":");
1252 Code.StackMapFrame frame = code.stackMapBuffer[i];
1254 // output PC
1255 if (debugstackmap) System.out.print(" pc=" + frame.pc);
1256 databuf.appendChar(frame.pc);
1258 // output locals
1259 int localCount = 0;
1260 for (int j=0; j<frame.locals.length;
1261 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
1262 localCount++;
1263 }
1264 if (debugstackmap) System.out.print(" nlocals=" +
1265 localCount);
1266 databuf.appendChar(localCount);
1267 for (int j=0; j<frame.locals.length;
1268 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {
1269 if (debugstackmap) System.out.print(" local[" + j + "]=");
1270 writeStackMapType(frame.locals[j]);
1271 }
1273 // output stack
1274 int stackCount = 0;
1275 for (int j=0; j<frame.stack.length;
1276 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
1277 stackCount++;
1278 }
1279 if (debugstackmap) System.out.print(" nstack=" +
1280 stackCount);
1281 databuf.appendChar(stackCount);
1282 for (int j=0; j<frame.stack.length;
1283 j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {
1284 if (debugstackmap) System.out.print(" stack[" + j + "]=");
1285 writeStackMapType(frame.stack[j]);
1286 }
1287 if (debugstackmap) System.out.println();
1288 }
1289 break;
1290 case JSR202: {
1291 Assert.checkNull(code.stackMapBuffer);
1292 for (int i=0; i<nframes; i++) {
1293 if (debugstackmap) System.out.print(" " + i + ":");
1294 StackMapTableFrame frame = code.stackMapTableBuffer[i];
1295 frame.write(this);
1296 if (debugstackmap) System.out.println();
1297 }
1298 break;
1299 }
1300 default:
1301 throw new AssertionError("Unexpected stackmap format value");
1302 }
1303 }
1305 //where
1306 void writeStackMapType(Type t) {
1307 if (t == null) {
1308 if (debugstackmap) System.out.print("empty");
1309 databuf.appendByte(0);
1310 }
1311 else switch(t.getTag()) {
1312 case BYTE:
1313 case CHAR:
1314 case SHORT:
1315 case INT:
1316 case BOOLEAN:
1317 if (debugstackmap) System.out.print("int");
1318 databuf.appendByte(1);
1319 break;
1320 case FLOAT:
1321 if (debugstackmap) System.out.print("float");
1322 databuf.appendByte(2);
1323 break;
1324 case DOUBLE:
1325 if (debugstackmap) System.out.print("double");
1326 databuf.appendByte(3);
1327 break;
1328 case LONG:
1329 if (debugstackmap) System.out.print("long");
1330 databuf.appendByte(4);
1331 break;
1332 case BOT: // null
1333 if (debugstackmap) System.out.print("null");
1334 databuf.appendByte(5);
1335 break;
1336 case CLASS:
1337 case ARRAY:
1338 if (debugstackmap) System.out.print("object(" + t + ")");
1339 databuf.appendByte(7);
1340 databuf.appendChar(pool.put(t));
1341 break;
1342 case TYPEVAR:
1343 if (debugstackmap) System.out.print("object(" + types.erasure(t).tsym + ")");
1344 databuf.appendByte(7);
1345 databuf.appendChar(pool.put(types.erasure(t).tsym));
1346 break;
1347 case UNINITIALIZED_THIS:
1348 if (debugstackmap) System.out.print("uninit_this");
1349 databuf.appendByte(6);
1350 break;
1351 case UNINITIALIZED_OBJECT:
1352 { UninitializedType uninitType = (UninitializedType)t;
1353 databuf.appendByte(8);
1354 if (debugstackmap) System.out.print("uninit_object@" + uninitType.offset);
1355 databuf.appendChar(uninitType.offset);
1356 }
1357 break;
1358 default:
1359 throw new AssertionError();
1360 }
1361 }
1363 /** An entry in the JSR202 StackMapTable */
1364 abstract static class StackMapTableFrame {
1365 abstract int getFrameType();
1367 void write(ClassWriter writer) {
1368 int frameType = getFrameType();
1369 writer.databuf.appendByte(frameType);
1370 if (writer.debugstackmap) System.out.print(" frame_type=" + frameType);
1371 }
1373 static class SameFrame extends StackMapTableFrame {
1374 final int offsetDelta;
1375 SameFrame(int offsetDelta) {
1376 this.offsetDelta = offsetDelta;
1377 }
1378 int getFrameType() {
1379 return (offsetDelta < SAME_FRAME_SIZE) ? offsetDelta : SAME_FRAME_EXTENDED;
1380 }
1381 @Override
1382 void write(ClassWriter writer) {
1383 super.write(writer);
1384 if (getFrameType() == SAME_FRAME_EXTENDED) {
1385 writer.databuf.appendChar(offsetDelta);
1386 if (writer.debugstackmap){
1387 System.out.print(" offset_delta=" + offsetDelta);
1388 }
1389 }
1390 }
1391 }
1393 static class SameLocals1StackItemFrame extends StackMapTableFrame {
1394 final int offsetDelta;
1395 final Type stack;
1396 SameLocals1StackItemFrame(int offsetDelta, Type stack) {
1397 this.offsetDelta = offsetDelta;
1398 this.stack = stack;
1399 }
1400 int getFrameType() {
1401 return (offsetDelta < SAME_FRAME_SIZE) ?
1402 (SAME_FRAME_SIZE + offsetDelta) :
1403 SAME_LOCALS_1_STACK_ITEM_EXTENDED;
1404 }
1405 @Override
1406 void write(ClassWriter writer) {
1407 super.write(writer);
1408 if (getFrameType() == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {
1409 writer.databuf.appendChar(offsetDelta);
1410 if (writer.debugstackmap) {
1411 System.out.print(" offset_delta=" + offsetDelta);
1412 }
1413 }
1414 if (writer.debugstackmap) {
1415 System.out.print(" stack[" + 0 + "]=");
1416 }
1417 writer.writeStackMapType(stack);
1418 }
1419 }
1421 static class ChopFrame extends StackMapTableFrame {
1422 final int frameType;
1423 final int offsetDelta;
1424 ChopFrame(int frameType, int offsetDelta) {
1425 this.frameType = frameType;
1426 this.offsetDelta = offsetDelta;
1427 }
1428 int getFrameType() { return frameType; }
1429 @Override
1430 void write(ClassWriter writer) {
1431 super.write(writer);
1432 writer.databuf.appendChar(offsetDelta);
1433 if (writer.debugstackmap) {
1434 System.out.print(" offset_delta=" + offsetDelta);
1435 }
1436 }
1437 }
1439 static class AppendFrame extends StackMapTableFrame {
1440 final int frameType;
1441 final int offsetDelta;
1442 final Type[] locals;
1443 AppendFrame(int frameType, int offsetDelta, Type[] locals) {
1444 this.frameType = frameType;
1445 this.offsetDelta = offsetDelta;
1446 this.locals = locals;
1447 }
1448 int getFrameType() { return frameType; }
1449 @Override
1450 void write(ClassWriter writer) {
1451 super.write(writer);
1452 writer.databuf.appendChar(offsetDelta);
1453 if (writer.debugstackmap) {
1454 System.out.print(" offset_delta=" + offsetDelta);
1455 }
1456 for (int i=0; i<locals.length; i++) {
1457 if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
1458 writer.writeStackMapType(locals[i]);
1459 }
1460 }
1461 }
1463 static class FullFrame extends StackMapTableFrame {
1464 final int offsetDelta;
1465 final Type[] locals;
1466 final Type[] stack;
1467 FullFrame(int offsetDelta, Type[] locals, Type[] stack) {
1468 this.offsetDelta = offsetDelta;
1469 this.locals = locals;
1470 this.stack = stack;
1471 }
1472 int getFrameType() { return FULL_FRAME; }
1473 @Override
1474 void write(ClassWriter writer) {
1475 super.write(writer);
1476 writer.databuf.appendChar(offsetDelta);
1477 writer.databuf.appendChar(locals.length);
1478 if (writer.debugstackmap) {
1479 System.out.print(" offset_delta=" + offsetDelta);
1480 System.out.print(" nlocals=" + locals.length);
1481 }
1482 for (int i=0; i<locals.length; i++) {
1483 if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");
1484 writer.writeStackMapType(locals[i]);
1485 }
1487 writer.databuf.appendChar(stack.length);
1488 if (writer.debugstackmap) { System.out.print(" nstack=" + stack.length); }
1489 for (int i=0; i<stack.length; i++) {
1490 if (writer.debugstackmap) System.out.print(" stack[" + i + "]=");
1491 writer.writeStackMapType(stack[i]);
1492 }
1493 }
1494 }
1496 /** Compare this frame with the previous frame and produce
1497 * an entry of compressed stack map frame. */
1498 static StackMapTableFrame getInstance(Code.StackMapFrame this_frame,
1499 int prev_pc,
1500 Type[] prev_locals,
1501 Types types) {
1502 Type[] locals = this_frame.locals;
1503 Type[] stack = this_frame.stack;
1504 int offset_delta = this_frame.pc - prev_pc - 1;
1505 if (stack.length == 1) {
1506 if (locals.length == prev_locals.length
1507 && compare(prev_locals, locals, types) == 0) {
1508 return new SameLocals1StackItemFrame(offset_delta, stack[0]);
1509 }
1510 } else if (stack.length == 0) {
1511 int diff_length = compare(prev_locals, locals, types);
1512 if (diff_length == 0) {
1513 return new SameFrame(offset_delta);
1514 } else if (-MAX_LOCAL_LENGTH_DIFF < diff_length && diff_length < 0) {
1515 // APPEND
1516 Type[] local_diff = new Type[-diff_length];
1517 for (int i=prev_locals.length, j=0; i<locals.length; i++,j++) {
1518 local_diff[j] = locals[i];
1519 }
1520 return new AppendFrame(SAME_FRAME_EXTENDED - diff_length,
1521 offset_delta,
1522 local_diff);
1523 } else if (0 < diff_length && diff_length < MAX_LOCAL_LENGTH_DIFF) {
1524 // CHOP
1525 return new ChopFrame(SAME_FRAME_EXTENDED - diff_length,
1526 offset_delta);
1527 }
1528 }
1529 // FULL_FRAME
1530 return new FullFrame(offset_delta, locals, stack);
1531 }
1533 static boolean isInt(Type t) {
1534 return (t.getTag().isStrictSubRangeOf(INT) || t.hasTag(BOOLEAN));
1535 }
1537 static boolean isSameType(Type t1, Type t2, Types types) {
1538 if (t1 == null) { return t2 == null; }
1539 if (t2 == null) { return false; }
1541 if (isInt(t1) && isInt(t2)) { return true; }
1543 if (t1.hasTag(UNINITIALIZED_THIS)) {
1544 return t2.hasTag(UNINITIALIZED_THIS);
1545 } else if (t1.hasTag(UNINITIALIZED_OBJECT)) {
1546 if (t2.hasTag(UNINITIALIZED_OBJECT)) {
1547 return ((UninitializedType)t1).offset == ((UninitializedType)t2).offset;
1548 } else {
1549 return false;
1550 }
1551 } else if (t2.hasTag(UNINITIALIZED_THIS) || t2.hasTag(UNINITIALIZED_OBJECT)) {
1552 return false;
1553 }
1555 return types.isSameType(t1, t2);
1556 }
1558 static int compare(Type[] arr1, Type[] arr2, Types types) {
1559 int diff_length = arr1.length - arr2.length;
1560 if (diff_length > MAX_LOCAL_LENGTH_DIFF || diff_length < -MAX_LOCAL_LENGTH_DIFF) {
1561 return Integer.MAX_VALUE;
1562 }
1563 int len = (diff_length > 0) ? arr2.length : arr1.length;
1564 for (int i=0; i<len; i++) {
1565 if (!isSameType(arr1[i], arr2[i], types)) {
1566 return Integer.MAX_VALUE;
1567 }
1568 }
1569 return diff_length;
1570 }
1571 }
1573 void writeFields(Scope.Entry e) {
1574 // process them in reverse sibling order;
1575 // i.e., process them in declaration order.
1576 List<VarSymbol> vars = List.nil();
1577 for (Scope.Entry i = e; i != null; i = i.sibling) {
1578 if (i.sym.kind == VAR) vars = vars.prepend((VarSymbol)i.sym);
1579 }
1580 while (vars.nonEmpty()) {
1581 writeField(vars.head);
1582 vars = vars.tail;
1583 }
1584 }
1586 void writeMethods(Scope.Entry e) {
1587 List<MethodSymbol> methods = List.nil();
1588 for (Scope.Entry i = e; i != null; i = i.sibling) {
1589 if (i.sym.kind == MTH && (i.sym.flags() & HYPOTHETICAL) == 0)
1590 methods = methods.prepend((MethodSymbol)i.sym);
1591 }
1592 while (methods.nonEmpty()) {
1593 writeMethod(methods.head);
1594 methods = methods.tail;
1595 }
1596 }
1598 /** Emit a class file for a given class.
1599 * @param c The class from which a class file is generated.
1600 */
1601 public JavaFileObject writeClass(ClassSymbol c)
1602 throws IOException, PoolOverflow, StringOverflow
1603 {
1604 JavaFileObject outFile
1605 = fileManager.getJavaFileForOutput(CLASS_OUTPUT,
1606 c.flatname.toString(),
1607 JavaFileObject.Kind.CLASS,
1608 c.sourcefile);
1609 OutputStream out = outFile.openOutputStream();
1610 try {
1611 writeClassFile(out, c);
1612 if (verbose)
1613 log.printVerbose("wrote.file", outFile);
1614 out.close();
1615 out = null;
1616 } finally {
1617 if (out != null) {
1618 // if we are propagating an exception, delete the file
1619 out.close();
1620 outFile.delete();
1621 outFile = null;
1622 }
1623 }
1624 return outFile; // may be null if write failed
1625 }
1627 /** Write class `c' to outstream `out'.
1628 */
1629 public void writeClassFile(OutputStream out, ClassSymbol c)
1630 throws IOException, PoolOverflow, StringOverflow {
1631 Assert.check((c.flags() & COMPOUND) == 0);
1632 databuf.reset();
1633 poolbuf.reset();
1634 signatureGen.reset();
1635 pool = c.pool;
1636 innerClasses = null;
1637 innerClassesQueue = null;
1638 bootstrapMethods = new LinkedHashMap<DynamicMethod, MethodHandle>();
1640 Type supertype = types.supertype(c.type);
1641 List<Type> interfaces = types.interfaces(c.type);
1642 List<Type> typarams = c.type.getTypeArguments();
1644 int flags = adjustFlags(c.flags() & ~DEFAULT);
1645 if ((flags & PROTECTED) != 0) flags |= PUBLIC;
1646 flags = flags & ClassFlags & ~STRICTFP;
1647 if ((flags & INTERFACE) == 0) flags |= ACC_SUPER;
1648 if (c.isInner() && c.name.isEmpty()) flags &= ~FINAL;
1649 if (dumpClassModifiers) {
1650 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);
1651 pw.println();
1652 pw.println("CLASSFILE " + c.getQualifiedName());
1653 pw.println("---" + flagNames(flags));
1654 }
1655 databuf.appendChar(flags);
1657 databuf.appendChar(pool.put(c));
1658 databuf.appendChar(supertype.hasTag(CLASS) ? pool.put(supertype.tsym) : 0);
1659 databuf.appendChar(interfaces.length());
1660 for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
1661 databuf.appendChar(pool.put(l.head.tsym));
1662 int fieldsCount = 0;
1663 int methodsCount = 0;
1664 for (Scope.Entry e = c.members().elems; e != null; e = e.sibling) {
1665 switch (e.sym.kind) {
1666 case VAR: fieldsCount++; break;
1667 case MTH: if ((e.sym.flags() & HYPOTHETICAL) == 0) methodsCount++;
1668 break;
1669 case TYP: enterInner((ClassSymbol)e.sym); break;
1670 default : Assert.error();
1671 }
1672 }
1674 if (c.trans_local != null) {
1675 for (ClassSymbol local : c.trans_local) {
1676 enterInner(local);
1677 }
1678 }
1680 databuf.appendChar(fieldsCount);
1681 writeFields(c.members().elems);
1682 databuf.appendChar(methodsCount);
1683 writeMethods(c.members().elems);
1685 int acountIdx = beginAttrs();
1686 int acount = 0;
1688 boolean sigReq =
1689 typarams.length() != 0 || supertype.allparams().length() != 0;
1690 for (List<Type> l = interfaces; !sigReq && l.nonEmpty(); l = l.tail)
1691 sigReq = l.head.allparams().length() != 0;
1692 if (sigReq) {
1693 Assert.check(source.allowGenerics());
1694 int alenIdx = writeAttr(names.Signature);
1695 if (typarams.length() != 0) signatureGen.assembleParamsSig(typarams);
1696 signatureGen.assembleSig(supertype);
1697 for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)
1698 signatureGen.assembleSig(l.head);
1699 databuf.appendChar(pool.put(signatureGen.toName()));
1700 signatureGen.reset();
1701 endAttr(alenIdx);
1702 acount++;
1703 }
1705 if (c.sourcefile != null && emitSourceFile) {
1706 int alenIdx = writeAttr(names.SourceFile);
1707 // WHM 6/29/1999: Strip file path prefix. We do it here at
1708 // the last possible moment because the sourcefile may be used
1709 // elsewhere in error diagnostics. Fixes 4241573.
1710 //databuf.appendChar(c.pool.put(c.sourcefile));
1711 String simpleName = BaseFileObject.getSimpleName(c.sourcefile);
1712 databuf.appendChar(c.pool.put(names.fromString(simpleName)));
1713 endAttr(alenIdx);
1714 acount++;
1715 }
1717 if (genCrt) {
1718 // Append SourceID attribute
1719 int alenIdx = writeAttr(names.SourceID);
1720 databuf.appendChar(c.pool.put(names.fromString(Long.toString(getLastModified(c.sourcefile)))));
1721 endAttr(alenIdx);
1722 acount++;
1723 // Append CompilationID attribute
1724 alenIdx = writeAttr(names.CompilationID);
1725 databuf.appendChar(c.pool.put(names.fromString(Long.toString(System.currentTimeMillis()))));
1726 endAttr(alenIdx);
1727 acount++;
1728 }
1730 acount += writeFlagAttrs(c.flags());
1731 acount += writeJavaAnnotations(c.getRawAttributes());
1732 acount += writeTypeAnnotations(c.getRawTypeAttributes(), false);
1733 acount += writeEnclosingMethodAttribute(c);
1734 acount += writeExtraClassAttributes(c);
1736 poolbuf.appendInt(JAVA_MAGIC);
1737 poolbuf.appendChar(target.minorVersion);
1738 poolbuf.appendChar(target.majorVersion);
1740 writePool(c.pool);
1742 if (innerClasses != null) {
1743 writeInnerClasses();
1744 acount++;
1745 }
1747 if (!bootstrapMethods.isEmpty()) {
1748 writeBootstrapMethods();
1749 acount++;
1750 }
1752 endAttrs(acountIdx, acount);
1754 poolbuf.appendBytes(databuf.elems, 0, databuf.length);
1755 out.write(poolbuf.elems, 0, poolbuf.length);
1757 pool = c.pool = null; // to conserve space
1758 }
1760 /**Allows subclasses to write additional class attributes
1761 *
1762 * @return the number of attributes written
1763 */
1764 protected int writeExtraClassAttributes(ClassSymbol c) {
1765 return 0;
1766 }
1768 int adjustFlags(final long flags) {
1769 int result = (int)flags;
1770 if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag())
1771 result &= ~SYNTHETIC;
1772 if ((flags & ENUM) != 0 && !target.useEnumFlag())
1773 result &= ~ENUM;
1774 if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag())
1775 result &= ~ANNOTATION;
1777 if ((flags & BRIDGE) != 0 && target.useBridgeFlag())
1778 result |= ACC_BRIDGE;
1779 if ((flags & VARARGS) != 0 && target.useVarargsFlag())
1780 result |= ACC_VARARGS;
1781 if ((flags & DEFAULT) != 0)
1782 result &= ~ABSTRACT;
1783 return result;
1784 }
1786 long getLastModified(FileObject filename) {
1787 long mod = 0;
1788 try {
1789 mod = filename.getLastModified();
1790 } catch (SecurityException e) {
1791 throw new AssertionError("CRT: couldn't get source file modification date: " + e.getMessage());
1792 }
1793 return mod;
1794 }
1795 }