jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java@71f35e4b93a5

8006775: JSR 308: Compiler changes in JDK8
Reviewed-by: jjg
Contributed-by: mernst@cs.washington.edu, wmdietl@cs.washington.edu, mpapi@csail.mit.edu, mahmood@notnoop.com

     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.lang.model.type.TypeKind;

    35 import javax.tools.JavaFileManager;

    36 import javax.tools.FileObject;

    37 import javax.tools.JavaFileObject;

    39 import com.sun.tools.javac.code.*;

    40 import com.sun.tools.javac.code.Attribute.RetentionPolicy;

    41 import com.sun.tools.javac.code.Attribute.TypeCompound;

    42 import com.sun.tools.javac.code.Symbol.*;

    43 import com.sun.tools.javac.code.Type.*;

    44 import com.sun.tools.javac.code.Types.UniqueType;

    45 import com.sun.tools.javac.file.BaseFileObject;

    46 import com.sun.tools.javac.jvm.Pool.DynamicMethod;

    47 import com.sun.tools.javac.jvm.Pool.Method;

    48 import com.sun.tools.javac.jvm.Pool.MethodHandle;

    49 import com.sun.tools.javac.jvm.Pool.Variable;

    50 import com.sun.tools.javac.util.*;

    52 import static com.sun.tools.javac.code.Flags.*;

    53 import static com.sun.tools.javac.code.Kinds.*;

    54 import static com.sun.tools.javac.code.TypeTag.*;

    55 import static com.sun.tools.javac.jvm.UninitializedType.*;

    56 import static com.sun.tools.javac.main.Option.*;

    57 import static javax.tools.StandardLocation.CLASS_OUTPUT;

    60 /** This class provides operations to map an internal symbol table graph

    61  *  rooted in a ClassSymbol into a classfile.

    62  *

    63  *  <p><b>This is NOT part of any supported API.

    64  *  If you write code that depends on this, you do so at your own risk.

    65  *  This code and its internal interfaces are subject to change or

    66  *  deletion without notice.</b>

    67  */

    68 public class ClassWriter extends ClassFile {

    69     protected static final Context.Key<ClassWriter> classWriterKey =

    70         new Context.Key<ClassWriter>();

    72     private final Options options;

    74     /** Switch: verbose output.

    75      */

    76     private boolean verbose;

    78     /** Switch: scramble private field names.

    79      */

    80     private boolean scramble;

    82     /** Switch: scramble all field names.

    83      */

    84     private boolean scrambleAll;

    86     /** Switch: retrofit mode.

    87      */

    88     private boolean retrofit;

    90     /** Switch: emit source file attribute.

    91      */

    92     private boolean emitSourceFile;

    94     /** Switch: generate CharacterRangeTable attribute.

    95      */

    96     private boolean genCrt;

    98     /** Switch: describe the generated stackmap.

    99      */

   100     boolean debugstackmap;

   102     /**

   103      * Target class version.

   104      */

   105     private Target target;

   107     /**

   108      * Source language version.

   109      */

   110     private Source source;

   112     /** Type utilities. */

   113     private Types types;

   115     /** The initial sizes of the data and constant pool buffers.

   116      *  Sizes are increased when buffers get full.

   117      */

   118     static final int DATA_BUF_SIZE = 0x0fff0;

   119     static final int POOL_BUF_SIZE = 0x1fff0;

   121     /** An output buffer for member info.

   122      */

   123     ByteBuffer databuf = new ByteBuffer(DATA_BUF_SIZE);

   125     /** An output buffer for the constant pool.

   126      */

   127     ByteBuffer poolbuf = new ByteBuffer(POOL_BUF_SIZE);

   129     /** An output buffer for type signatures.

   130      */

   131     ByteBuffer sigbuf = new ByteBuffer();

   133     /** The constant pool.

   134      */

   135     Pool pool;

   137     /** The inner classes to be written, as a set.

   138      */

   139     Set<ClassSymbol> innerClasses;

   141     /** The inner classes to be written, as a queue where

   142      *  enclosing classes come first.

   143      */

   144     ListBuffer<ClassSymbol> innerClassesQueue;

   146     /** The bootstrap methods to be written in the corresponding class attribute

   147      *  (one for each invokedynamic)

   148      */

   149     Map<DynamicMethod, MethodHandle> bootstrapMethods;

   151     /** The log to use for verbose output.

   152      */

   153     private final Log log;

   155     /** The name table. */

   156     private final Names names;

   158     /** Access to files. */

   159     private final JavaFileManager fileManager;

   161     /** The tags and constants used in compressed stackmap. */

   162     static final int SAME_FRAME_SIZE = 64;

   163     static final int SAME_LOCALS_1_STACK_ITEM_EXTENDED = 247;

   164     static final int SAME_FRAME_EXTENDED = 251;

   165     static final int FULL_FRAME = 255;

   166     static final int MAX_LOCAL_LENGTH_DIFF = 4;

   168     /** Get the ClassWriter instance for this context. */

   169     public static ClassWriter instance(Context context) {

   170         ClassWriter instance = context.get(classWriterKey);

   171         if (instance == null)

   172             instance = new ClassWriter(context);

   173         return instance;

   174     }

   176     /** Construct a class writer, given an options table.

   177      */

   178     protected ClassWriter(Context context) {

   179         context.put(classWriterKey, this);

   181         log = Log.instance(context);

   182         names = Names.instance(context);

   183         options = Options.instance(context);

   184         target = Target.instance(context);

   185         source = Source.instance(context);

   186         types = Types.instance(context);

   187         fileManager = context.get(JavaFileManager.class);

   189         verbose        = options.isSet(VERBOSE);

   190         scramble       = options.isSet("-scramble");

   191         scrambleAll    = options.isSet("-scrambleAll");

   192         retrofit       = options.isSet("-retrofit");

   193         genCrt         = options.isSet(XJCOV);

   194         debugstackmap  = options.isSet("debugstackmap");

   196         emitSourceFile = options.isUnset(G_CUSTOM) ||

   197                             options.isSet(G_CUSTOM, "source");

   199         String dumpModFlags = options.get("dumpmodifiers");

   200         dumpClassModifiers =

   201             (dumpModFlags != null && dumpModFlags.indexOf('c') != -1);

   202         dumpFieldModifiers =

   203             (dumpModFlags != null && dumpModFlags.indexOf('f') != -1);

   204         dumpInnerClassModifiers =

   205             (dumpModFlags != null && dumpModFlags.indexOf('i') != -1);

   206         dumpMethodModifiers =

   207             (dumpModFlags != null && dumpModFlags.indexOf('m') != -1);

   208     }

   210 /******************************************************************

   211  * Diagnostics: dump generated class names and modifiers

   212  ******************************************************************/

   214     /** Value of option 'dumpmodifiers' is a string

   215      *  indicating which modifiers should be dumped for debugging:

   216      *    'c' -- classes

   217      *    'f' -- fields

   218      *    'i' -- innerclass attributes

   219      *    'm' -- methods

   220      *  For example, to dump everything:

   221      *    javac -XDdumpmodifiers=cifm MyProg.java

   222      */

   223     private final boolean dumpClassModifiers; // -XDdumpmodifiers=c

   224     private final boolean dumpFieldModifiers; // -XDdumpmodifiers=f

   225     private final boolean dumpInnerClassModifiers; // -XDdumpmodifiers=i

   226     private final boolean dumpMethodModifiers; // -XDdumpmodifiers=m

   229     /** Return flags as a string, separated by " ".

   230      */

   231     public static String flagNames(long flags) {

   232         StringBuilder sbuf = new StringBuilder();

   233         int i = 0;

   234         long f = flags & StandardFlags;

   235         while (f != 0) {

   236             if ((f & 1) != 0) {

   237                 sbuf.append(" ");

   238                 sbuf.append(flagName[i]);

   239             }

   240             f = f >> 1;

   241             i++;

   242         }

   243         return sbuf.toString();

   244     }

   245     //where

   246         private final static String[] flagName = {

   247             "PUBLIC", "PRIVATE", "PROTECTED", "STATIC", "FINAL",

   248             "SUPER", "VOLATILE", "TRANSIENT", "NATIVE", "INTERFACE",

   249             "ABSTRACT", "STRICTFP"};

   251 /******************************************************************

   252  * Output routines

   253  ******************************************************************/

   255     /** Write a character into given byte buffer;

   256      *  byte buffer will not be grown.

   257      */

   258     void putChar(ByteBuffer buf, int op, int x) {

   259         buf.elems[op  ] = (byte)((x >>  8) & 0xFF);

   260         buf.elems[op+1] = (byte)((x      ) & 0xFF);

   261     }

   263     /** Write an integer into given byte buffer;

   264      *  byte buffer will not be grown.

   265      */

   266     void putInt(ByteBuffer buf, int adr, int x) {

   267         buf.elems[adr  ] = (byte)((x >> 24) & 0xFF);

   268         buf.elems[adr+1] = (byte)((x >> 16) & 0xFF);

   269         buf.elems[adr+2] = (byte)((x >>  8) & 0xFF);

   270         buf.elems[adr+3] = (byte)((x      ) & 0xFF);

   271     }

   273 /******************************************************************

   274  * Signature Generation

   275  ******************************************************************/

   277     /** Assemble signature of given type in string buffer.

   278      */

   279     void assembleSig(Type type) {

   280         type = type.unannotatedType();

   281         switch (type.getTag()) {

   282         case BYTE:

   283             sigbuf.appendByte('B');

   284             break;

   285         case SHORT:

   286             sigbuf.appendByte('S');

   287             break;

   288         case CHAR:

   289             sigbuf.appendByte('C');

   290             break;

   291         case INT:

   292             sigbuf.appendByte('I');

   293             break;

   294         case LONG:

   295             sigbuf.appendByte('J');

   296             break;

   297         case FLOAT:

   298             sigbuf.appendByte('F');

   299             break;

   300         case DOUBLE:

   301             sigbuf.appendByte('D');

   302             break;

   303         case BOOLEAN:

   304             sigbuf.appendByte('Z');

   305             break;

   306         case VOID:

   307             sigbuf.appendByte('V');

   308             break;

   309         case CLASS:

   310             sigbuf.appendByte('L');

   311             assembleClassSig(type);

   312             sigbuf.appendByte(';');

   313             break;

   314         case ARRAY:

   315             ArrayType at = (ArrayType)type;

   316             sigbuf.appendByte('[');

   317             assembleSig(at.elemtype);

   318             break;

   319         case METHOD:

   320             MethodType mt = (MethodType)type;

   321             sigbuf.appendByte('(');

   322             assembleSig(mt.argtypes);

   323             sigbuf.appendByte(')');

   324             assembleSig(mt.restype);

   325             if (hasTypeVar(mt.thrown)) {

   326                 for (List<Type> l = mt.thrown; l.nonEmpty(); l = l.tail) {

   327                     sigbuf.appendByte('^');

   328                     assembleSig(l.head);

   329                 }

   330             }

   331             break;

   332         case WILDCARD: {

   333             WildcardType ta = (WildcardType) type;

   334             switch (ta.kind) {

   335             case SUPER:

   336                 sigbuf.appendByte('-');

   337                 assembleSig(ta.type);

   338                 break;

   339             case EXTENDS:

   340                 sigbuf.appendByte('+');

   341                 assembleSig(ta.type);

   342                 break;

   343             case UNBOUND:

   344                 sigbuf.appendByte('*');

   345                 break;

   346             default:

   347                 throw new AssertionError(ta.kind);

   348             }

   349             break;

   350         }

   351         case TYPEVAR:

   352             sigbuf.appendByte('T');

   353             sigbuf.appendName(type.tsym.name);

   354             sigbuf.appendByte(';');

   355             break;

   356         case FORALL:

   357             ForAll ft = (ForAll)type;

   358             assembleParamsSig(ft.tvars);

   359             assembleSig(ft.qtype);

   360             break;

   361         case UNINITIALIZED_THIS:

   362         case UNINITIALIZED_OBJECT:

   363             // we don't yet have a spec for uninitialized types in the

   364             // local variable table

   365             assembleSig(types.erasure(((UninitializedType)type).qtype));

   366             break;

   367         default:

   368             throw new AssertionError("typeSig " + type.getTag());

   369         }

   370     }

   372     boolean hasTypeVar(List<Type> l) {

   373         while (l.nonEmpty()) {

   374             if (l.head.hasTag(TYPEVAR)) return true;

   375             l = l.tail;

   376         }

   377         return false;

   378     }

   380     void assembleClassSig(Type type) {

   381         type = type.unannotatedType();

   382         ClassType ct = (ClassType)type;

   383         ClassSymbol c = (ClassSymbol)ct.tsym;

   384         enterInner(c);

   385         Type outer = ct.getEnclosingType();

   386         if (outer.allparams().nonEmpty()) {

   387             boolean rawOuter =

   388                 c.owner.kind == MTH || // either a local class

   389                 c.name == names.empty; // or anonymous

   390             assembleClassSig(rawOuter

   391                              ? types.erasure(outer)

   392                              : outer);

   393             sigbuf.appendByte('.');

   394             Assert.check(c.flatname.startsWith(c.owner.enclClass().flatname));

   395             sigbuf.appendName(rawOuter

   396                               ? c.flatname.subName(c.owner.enclClass().flatname.getByteLength()+1,c.flatname.getByteLength())

   397                               : c.name);

   398         } else {

   399             sigbuf.appendBytes(externalize(c.flatname));

   400         }

   401         if (ct.getTypeArguments().nonEmpty()) {

   402             sigbuf.appendByte('<');

   403             assembleSig(ct.getTypeArguments());

   404             sigbuf.appendByte('>');

   405         }

   406     }

   409     void assembleSig(List<Type> types) {

   410         for (List<Type> ts = types; ts.nonEmpty(); ts = ts.tail)

   411             assembleSig(ts.head);

   412     }

   414     void assembleParamsSig(List<Type> typarams) {

   415         sigbuf.appendByte('<');

   416         for (List<Type> ts = typarams; ts.nonEmpty(); ts = ts.tail) {

   417             TypeVar tvar = (TypeVar)ts.head;

   418             sigbuf.appendName(tvar.tsym.name);

   419             List<Type> bounds = types.getBounds(tvar);

   420             if ((bounds.head.tsym.flags() & INTERFACE) != 0) {

   421                 sigbuf.appendByte(':');

   422             }

   423             for (List<Type> l = bounds; l.nonEmpty(); l = l.tail) {

   424                 sigbuf.appendByte(':');

   425                 assembleSig(l.head);

   426             }

   427         }

   428         sigbuf.appendByte('>');

   429     }

   431     /** Return signature of given type

   432      */

   433     Name typeSig(Type type) {

   434         Assert.check(sigbuf.length == 0);

   435         //- System.out.println(" ? " + type);

   436         assembleSig(type);

   437         Name n = sigbuf.toName(names);

   438         sigbuf.reset();

   439         //- System.out.println("   " + n);

   440         return n;

   441     }

   443     /** Given a type t, return the extended class name of its erasure in

   444      *  external representation.

   445      */

   446     public Name xClassName(Type t) {

   447         if (t.hasTag(CLASS)) {

   448             return names.fromUtf(externalize(t.tsym.flatName()));

   449         } else if (t.hasTag(ARRAY)) {

   450             return typeSig(types.erasure(t));

   451         } else {

   452             throw new AssertionError("xClassName");

   453         }

   454     }

   456 /******************************************************************

   457  * Writing the Constant Pool

   458  ******************************************************************/

   460     /** Thrown when the constant pool is over full.

   461      */

   462     public static class PoolOverflow extends Exception {

   463         private static final long serialVersionUID = 0;

   464         public PoolOverflow() {}

   465     }

   466     public static class StringOverflow extends Exception {

   467         private static final long serialVersionUID = 0;

   468         public final String value;

   469         public StringOverflow(String s) {

   470             value = s;

   471         }

   472     }

   474     /** Write constant pool to pool buffer.

   475      *  Note: during writing, constant pool

   476      *  might grow since some parts of constants still need to be entered.

   477      */

   478     void writePool(Pool pool) throws PoolOverflow, StringOverflow {

   479         int poolCountIdx = poolbuf.length;

   480         poolbuf.appendChar(0);

   481         int i = 1;

   482         while (i < pool.pp) {

   483             Object value = pool.pool[i];

   484             Assert.checkNonNull(value);

   485             if (value instanceof Method)

   486                 value = ((Method)value).m;

   487             else if (value instanceof Variable)

   488                 value = ((Variable)value).v;

   490             if (value instanceof MethodSymbol) {

   491                 MethodSymbol m = (MethodSymbol)value;

   492                 if (!m.isDynamic()) {

   493                     poolbuf.appendByte((m.owner.flags() & INTERFACE) != 0

   494                               ? CONSTANT_InterfaceMethodref

   495                               : CONSTANT_Methodref);

   496                     poolbuf.appendChar(pool.put(m.owner));

   497                     poolbuf.appendChar(pool.put(nameType(m)));

   498                 } else {

   499                     //invokedynamic

   500                     DynamicMethodSymbol dynSym = (DynamicMethodSymbol)m;

   501                     MethodHandle handle = new MethodHandle(dynSym.bsmKind, dynSym.bsm, types);

   502                     DynamicMethod dynMeth = new DynamicMethod(dynSym, types);

   503                     bootstrapMethods.put(dynMeth, handle);

   504                     //init cp entries

   505                     pool.put(names.BootstrapMethods);

   506                     pool.put(handle);

   507                     for (Object staticArg : dynSym.staticArgs) {

   508                         pool.put(staticArg);

   509                     }

   510                     poolbuf.appendByte(CONSTANT_InvokeDynamic);

   511                     poolbuf.appendChar(bootstrapMethods.size() - 1);

   512                     poolbuf.appendChar(pool.put(nameType(dynSym)));

   513                 }

   514             } else if (value instanceof VarSymbol) {

   515                 VarSymbol v = (VarSymbol)value;

   516                 poolbuf.appendByte(CONSTANT_Fieldref);

   517                 poolbuf.appendChar(pool.put(v.owner));

   518                 poolbuf.appendChar(pool.put(nameType(v)));

   519             } else if (value instanceof Name) {

   520                 poolbuf.appendByte(CONSTANT_Utf8);

   521                 byte[] bs = ((Name)value).toUtf();

   522                 poolbuf.appendChar(bs.length);

   523                 poolbuf.appendBytes(bs, 0, bs.length);

   524                 if (bs.length > Pool.MAX_STRING_LENGTH)

   525                     throw new StringOverflow(value.toString());

   526             } else if (value instanceof ClassSymbol) {

   527                 ClassSymbol c = (ClassSymbol)value;

   528                 if (c.owner.kind == TYP) pool.put(c.owner);

   529                 poolbuf.appendByte(CONSTANT_Class);

   530                 if (c.type.hasTag(ARRAY)) {

   531                     poolbuf.appendChar(pool.put(typeSig(c.type)));

   532                 } else {

   533                     poolbuf.appendChar(pool.put(names.fromUtf(externalize(c.flatname))));

   534                     enterInner(c);

   535                 }

   536             } else if (value instanceof NameAndType) {

   537                 NameAndType nt = (NameAndType)value;

   538                 poolbuf.appendByte(CONSTANT_NameandType);

   539                 poolbuf.appendChar(pool.put(nt.name));

   540                 poolbuf.appendChar(pool.put(typeSig(nt.uniqueType.type)));

   541             } else if (value instanceof Integer) {

   542                 poolbuf.appendByte(CONSTANT_Integer);

   543                 poolbuf.appendInt(((Integer)value).intValue());

   544             } else if (value instanceof Long) {

   545                 poolbuf.appendByte(CONSTANT_Long);

   546                 poolbuf.appendLong(((Long)value).longValue());

   547                 i++;

   548             } else if (value instanceof Float) {

   549                 poolbuf.appendByte(CONSTANT_Float);

   550                 poolbuf.appendFloat(((Float)value).floatValue());

   551             } else if (value instanceof Double) {

   552                 poolbuf.appendByte(CONSTANT_Double);

   553                 poolbuf.appendDouble(((Double)value).doubleValue());

   554                 i++;

   555             } else if (value instanceof String) {

   556                 poolbuf.appendByte(CONSTANT_String);

   557                 poolbuf.appendChar(pool.put(names.fromString((String)value)));

   558             } else if (value instanceof UniqueType) {

   559                 Type type = ((UniqueType)value).type;

   560                 if (type instanceof MethodType) {

   561                     poolbuf.appendByte(CONSTANT_MethodType);

   562                     poolbuf.appendChar(pool.put(typeSig((MethodType)type)));

   563                 } else {

   564                     if (type.hasTag(CLASS)) enterInner((ClassSymbol)type.tsym);

   565                     poolbuf.appendByte(CONSTANT_Class);

   566                     poolbuf.appendChar(pool.put(xClassName(type)));

   567                 }

   568             } else if (value instanceof MethodHandle) {

   569                 MethodHandle ref = (MethodHandle)value;

   570                 poolbuf.appendByte(CONSTANT_MethodHandle);

   571                 poolbuf.appendByte(ref.refKind);

   572                 poolbuf.appendChar(pool.put(ref.refSym));

   573             } else {

   574                 Assert.error("writePool " + value);

   575             }

   576             i++;

   577         }

   578         if (pool.pp > Pool.MAX_ENTRIES)

   579             throw new PoolOverflow();

   580         putChar(poolbuf, poolCountIdx, pool.pp);

   581     }

   583     /** Given a field, return its name.

   584      */

   585     Name fieldName(Symbol sym) {

   586         if (scramble && (sym.flags() & PRIVATE) != 0 ||

   587             scrambleAll && (sym.flags() & (PROTECTED | PUBLIC)) == 0)

   588             return names.fromString("_$" + sym.name.getIndex());

   589         else

   590             return sym.name;

   591     }

   593     /** Given a symbol, return its name-and-type.

   594      */

   595     NameAndType nameType(Symbol sym) {

   596         return new NameAndType(fieldName(sym),

   597                                retrofit

   598                                ? sym.erasure(types)

   599                                : sym.externalType(types), types);

   600         // if we retrofit, then the NameAndType has been read in as is

   601         // and no change is necessary. If we compile normally, the

   602         // NameAndType is generated from a symbol reference, and the

   603         // adjustment of adding an additional this$n parameter needs to be made.

   604     }

   606 /******************************************************************

   607  * Writing Attributes

   608  ******************************************************************/

   610     /** Write header for an attribute to data buffer and return

   611      *  position past attribute length index.

   612      */

   613     int writeAttr(Name attrName) {

   614         databuf.appendChar(pool.put(attrName));

   615         databuf.appendInt(0);

   616         return databuf.length;

   617     }

   619     /** Fill in attribute length.

   620      */

   621     void endAttr(int index) {

   622         putInt(databuf, index - 4, databuf.length - index);

   623     }

   625     /** Leave space for attribute count and return index for

   626      *  number of attributes field.

   627      */

   628     int beginAttrs() {

   629         databuf.appendChar(0);

   630         return databuf.length;

   631     }

   633     /** Fill in number of attributes.

   634      */

   635     void endAttrs(int index, int count) {

   636         putChar(databuf, index - 2, count);

   637     }

   639     /** Write the EnclosingMethod attribute if needed.

   640      *  Returns the number of attributes written (0 or 1).

   641      */

   642     int writeEnclosingMethodAttribute(ClassSymbol c) {

   643         if (!target.hasEnclosingMethodAttribute())

   644             return 0;

   645         return writeEnclosingMethodAttribute(names.EnclosingMethod, c);

   646     }

   648     /** Write the EnclosingMethod attribute with a specified name.

   649      *  Returns the number of attributes written (0 or 1).

   650      */

   651     protected int writeEnclosingMethodAttribute(Name attributeName, ClassSymbol c) {

   652         if (c.owner.kind != MTH && // neither a local class

   653             c.name != names.empty) // nor anonymous

   654             return 0;

   656         int alenIdx = writeAttr(attributeName);

   657         ClassSymbol enclClass = c.owner.enclClass();

   658         MethodSymbol enclMethod =

   659             (c.owner.type == null // local to init block

   660              || c.owner.kind != MTH) // or member init

   661             ? null

   662             : (MethodSymbol)c.owner;

   663         databuf.appendChar(pool.put(enclClass));

   664         databuf.appendChar(enclMethod == null ? 0 : pool.put(nameType(c.owner)));

   665         endAttr(alenIdx);

   666         return 1;

   667     }

   669     /** Write flag attributes; return number of attributes written.

   670      */

   671     int writeFlagAttrs(long flags) {

   672         int acount = 0;

   673         if ((flags & DEPRECATED) != 0) {

   674             int alenIdx = writeAttr(names.Deprecated);

   675             endAttr(alenIdx);

   676             acount++;

   677         }

   678         if ((flags & ENUM) != 0 && !target.useEnumFlag()) {

   679             int alenIdx = writeAttr(names.Enum);

   680             endAttr(alenIdx);

   681             acount++;

   682         }

   683         if ((flags & SYNTHETIC) != 0 && !target.useSyntheticFlag()) {

   684             int alenIdx = writeAttr(names.Synthetic);

   685             endAttr(alenIdx);

   686             acount++;

   687         }

   688         if ((flags & BRIDGE) != 0 && !target.useBridgeFlag()) {

   689             int alenIdx = writeAttr(names.Bridge);

   690             endAttr(alenIdx);

   691             acount++;

   692         }

   693         if ((flags & VARARGS) != 0 && !target.useVarargsFlag()) {

   694             int alenIdx = writeAttr(names.Varargs);

   695             endAttr(alenIdx);

   696             acount++;

   697         }

   698         if ((flags & ANNOTATION) != 0 && !target.useAnnotationFlag()) {

   699             int alenIdx = writeAttr(names.Annotation);

   700             endAttr(alenIdx);

   701             acount++;

   702         }

   703         return acount;

   704     }

   706     /** Write member (field or method) attributes;

   707      *  return number of attributes written.

   708      */

   709     int writeMemberAttrs(Symbol sym) {

   710         int acount = writeFlagAttrs(sym.flags());

   711         long flags = sym.flags();

   712         if (source.allowGenerics() &&

   713             (flags & (SYNTHETIC|BRIDGE)) != SYNTHETIC &&

   714             (flags & ANONCONSTR) == 0 &&

   715             (!types.isSameType(sym.type, sym.erasure(types)) ||

   716              hasTypeVar(sym.type.getThrownTypes()))) {

   717             // note that a local class with captured variables

   718             // will get a signature attribute

   719             int alenIdx = writeAttr(names.Signature);

   720             databuf.appendChar(pool.put(typeSig(sym.type)));

   721             endAttr(alenIdx);

   722             acount++;

   723         }

   724         acount += writeJavaAnnotations(sym.getRawAttributes());

   725         acount += writeTypeAnnotations(sym.getRawTypeAttributes());

   726         return acount;

   727     }

   729     /**

   730      * Write method parameter names attribute.

   731      */

   732     int writeMethodParametersAttr(MethodSymbol m) {

   733         if (m.params != null && 0 != m.params.length()) {

   734             int attrIndex = writeAttr(names.MethodParameters);

   735             databuf.appendByte(m.params.length());

   736             for (VarSymbol s : m.params) {

   737                 // TODO: expand to cover synthesized, once we figure out

   738                 // how to represent that.

   739                 final int flags = (int) s.flags() & (FINAL | SYNTHETIC);

   740                 // output parameter info

   741                 databuf.appendChar(pool.put(s.name));

   742                 databuf.appendInt(flags);

   743             }

   744             endAttr(attrIndex);

   745             return 1;

   746         } else

   747             return 0;

   748     }

   751     /** Write method parameter annotations;

   752      *  return number of attributes written.

   753      */

   754     int writeParameterAttrs(MethodSymbol m) {

   755         boolean hasVisible = false;

   756         boolean hasInvisible = false;

   757         if (m.params != null) for (VarSymbol s : m.params) {

   758             for (Attribute.Compound a : s.getRawAttributes()) {

   759                 switch (types.getRetention(a)) {

   760                 case SOURCE: break;

   761                 case CLASS: hasInvisible = true; break;

   762                 case RUNTIME: hasVisible = true; break;

   763                 default: ;// /* fail soft */ throw new AssertionError(vis);

   764                 }

   765             }

   766         }

   768         int attrCount = 0;

   769         if (hasVisible) {

   770             int attrIndex = writeAttr(names.RuntimeVisibleParameterAnnotations);

   771             databuf.appendByte(m.params.length());

   772             for (VarSymbol s : m.params) {

   773                 ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();

   774                 for (Attribute.Compound a : s.getRawAttributes())

   775                     if (types.getRetention(a) == RetentionPolicy.RUNTIME)

   776                         buf.append(a);

   777                 databuf.appendChar(buf.length());

   778                 for (Attribute.Compound a : buf)

   779                     writeCompoundAttribute(a);

   780             }

   781             endAttr(attrIndex);

   782             attrCount++;

   783         }

   784         if (hasInvisible) {

   785             int attrIndex = writeAttr(names.RuntimeInvisibleParameterAnnotations);

   786             databuf.appendByte(m.params.length());

   787             for (VarSymbol s : m.params) {

   788                 ListBuffer<Attribute.Compound> buf = new ListBuffer<Attribute.Compound>();

   789                 for (Attribute.Compound a : s.getRawAttributes())

   790                     if (types.getRetention(a) == RetentionPolicy.CLASS)

   791                         buf.append(a);

   792                 databuf.appendChar(buf.length());

   793                 for (Attribute.Compound a : buf)

   794                     writeCompoundAttribute(a);

   795             }

   796             endAttr(attrIndex);

   797             attrCount++;

   798         }

   799         return attrCount;

   800     }

   802 /**********************************************************************

   803  * Writing Java-language annotations (aka metadata, attributes)

   804  **********************************************************************/

   806     /** Write Java-language annotations; return number of JVM

   807      *  attributes written (zero or one).

   808      */

   809     int writeJavaAnnotations(List<Attribute.Compound> attrs) {

   810         if (attrs.isEmpty()) return 0;

   811         ListBuffer<Attribute.Compound> visibles = new ListBuffer<Attribute.Compound>();

   812         ListBuffer<Attribute.Compound> invisibles = new ListBuffer<Attribute.Compound>();

   813         for (Attribute.Compound a : attrs) {

   814             switch (types.getRetention(a)) {

   815             case SOURCE: break;

   816             case CLASS: invisibles.append(a); break;

   817             case RUNTIME: visibles.append(a); break;

   818             default: ;// /* fail soft */ throw new AssertionError(vis);

   819             }

   820         }

   822         int attrCount = 0;

   823         if (visibles.length() != 0) {

   824             int attrIndex = writeAttr(names.RuntimeVisibleAnnotations);

   825             databuf.appendChar(visibles.length());

   826             for (Attribute.Compound a : visibles)

   827                 writeCompoundAttribute(a);

   828             endAttr(attrIndex);

   829             attrCount++;

   830         }

   831         if (invisibles.length() != 0) {

   832             int attrIndex = writeAttr(names.RuntimeInvisibleAnnotations);

   833             databuf.appendChar(invisibles.length());

   834             for (Attribute.Compound a : invisibles)

   835                 writeCompoundAttribute(a);

   836             endAttr(attrIndex);

   837             attrCount++;

   838         }

   839         return attrCount;

   840     }

   842     int writeTypeAnnotations(List<Attribute.TypeCompound> typeAnnos) {

   843         if (typeAnnos.isEmpty()) return 0;

   845         ListBuffer<Attribute.TypeCompound> visibles = ListBuffer.lb();

   846         ListBuffer<Attribute.TypeCompound> invisibles = ListBuffer.lb();

   848         for (Attribute.TypeCompound tc : typeAnnos) {

   849             if (tc.position == null || tc.position.type == TargetType.UNKNOWN) {

   850                 boolean found = false;

   851                 // TODO: the position for the container annotation of a

   852                 // repeating type annotation has to be set.

   853                 // This cannot be done when the container is created, because

   854                 // then the position is not determined yet.

   855                 // How can we link these pieces better together?

   856                 if (tc.values.size() == 1) {

   857                     Pair<MethodSymbol, Attribute> val = tc.values.get(0);

   858                     if (val.fst.getSimpleName().contentEquals("value") &&

   859                             val.snd instanceof Attribute.Array) {

   860                         Attribute.Array arr = (Attribute.Array) val.snd;

   861                         if (arr.values.length != 0 &&

   862                                 arr.values[0] instanceof Attribute.TypeCompound) {

   863                             TypeCompound atycomp = (Attribute.TypeCompound) arr.values[0];

   864                             if (atycomp.position.type != TargetType.UNKNOWN) {

   865                                 tc.position = atycomp.position;

   866                                 found = true;

   867                             }

   868                         }

   869                     }

   870                 }

   871                 if (!found) {

   872                     // This happens for nested types like @A Outer. @B Inner.

   873                     // For method parameters we get the annotation twice! Once with

   874                     // a valid position, once unknown.

   875                     // TODO: find a cleaner solution.

   876                     // System.err.println("ClassWriter: Position UNKNOWN in type annotation: " + tc);

   877                     continue;

   878                 }

   879             }

   880             if (!tc.position.emitToClassfile())

   881                 continue;

   882             switch (types.getRetention(tc)) {

   883             case SOURCE: break;

   884             case CLASS: invisibles.append(tc); break;

   885             case RUNTIME: visibles.append(tc); break;

   886             default: ;// /* fail soft */ throw new AssertionError(vis);

   887             }

   888         }

   890         int attrCount = 0;

   891         if (visibles.length() != 0) {

   892             int attrIndex = writeAttr(names.RuntimeVisibleTypeAnnotations);

   893             databuf.appendChar(visibles.length());

   894             for (Attribute.TypeCompound p : visibles)

   895                 writeTypeAnnotation(p);

   896             endAttr(attrIndex);

   897             attrCount++;

   898         }

   900         if (invisibles.length() != 0) {

   901             int attrIndex = writeAttr(names.RuntimeInvisibleTypeAnnotations);

   902             databuf.appendChar(invisibles.length());

   903             for (Attribute.TypeCompound p : invisibles)

   904                 writeTypeAnnotation(p);

   905             endAttr(attrIndex);

   906             attrCount++;

   907         }

   909         return attrCount;

   910     }

   912     /** A visitor to write an attribute including its leading

   913      *  single-character marker.

   914      */

   915     class AttributeWriter implements Attribute.Visitor {

   916         public void visitConstant(Attribute.Constant _value) {

   917             Object value = _value.value;

   918             switch (_value.type.getTag()) {

   919             case BYTE:

   920                 databuf.appendByte('B');

   921                 break;

   922             case CHAR:

   923                 databuf.appendByte('C');

   924                 break;

   925             case SHORT:

   926                 databuf.appendByte('S');

   927                 break;

   928             case INT:

   929                 databuf.appendByte('I');

   930                 break;

   931             case LONG:

   932                 databuf.appendByte('J');

   933                 break;

   934             case FLOAT:

   935                 databuf.appendByte('F');

   936                 break;

   937             case DOUBLE:

   938                 databuf.appendByte('D');

   939                 break;

   940             case BOOLEAN:

   941                 databuf.appendByte('Z');

   942                 break;

   943             case CLASS:

   944                 Assert.check(value instanceof String);

   945                 databuf.appendByte('s');

   946                 value = names.fromString(value.toString()); // CONSTANT_Utf8

   947                 break;

   948             default:

   949                 throw new AssertionError(_value.type);

   950             }

   951             databuf.appendChar(pool.put(value));

   952         }

   953         public void visitEnum(Attribute.Enum e) {

   954             databuf.appendByte('e');

   955             databuf.appendChar(pool.put(typeSig(e.value.type)));

   956             databuf.appendChar(pool.put(e.value.name));

   957         }

   958         public void visitClass(Attribute.Class clazz) {

   959             databuf.appendByte('c');

   960             databuf.appendChar(pool.put(typeSig(clazz.classType)));

   961         }

   962         public void visitCompound(Attribute.Compound compound) {

   963             databuf.appendByte('@');

   964             writeCompoundAttribute(compound);

   965         }

   966         public void visitError(Attribute.Error x) {

   967             throw new AssertionError(x);

   968         }

   969         public void visitArray(Attribute.Array array) {

   970             databuf.appendByte('[');

   971             databuf.appendChar(array.values.length);

   972             for (Attribute a : array.values) {

   973                 a.accept(this);

   974             }

   975         }

   976     }

   977     AttributeWriter awriter = new AttributeWriter();

   979     /** Write a compound attribute excluding the '@' marker. */

   980     void writeCompoundAttribute(Attribute.Compound c) {

   981         databuf.appendChar(pool.put(typeSig(c.type)));

   982         databuf.appendChar(c.values.length());

   983         for (Pair<Symbol.MethodSymbol,Attribute> p : c.values) {

   984             databuf.appendChar(pool.put(p.fst.name));

   985             p.snd.accept(awriter);

   986         }

   987     }

   989     void writeTypeAnnotation(Attribute.TypeCompound c) {

   990         writePosition(c.position);

   991         writeCompoundAttribute(c);

   992     }

   994     void writePosition(TypeAnnotationPosition p) {

   995         databuf.appendByte(p.type.targetTypeValue()); // TargetType tag is a byte

   996         switch (p.type) {

   997         // type cast

   998         case CAST:

   999         // instanceof

  1000         case INSTANCEOF:

  1001         // new expression

  1002         case NEW:

  1003             databuf.appendChar(p.offset);

  1004             break;

  1005         // local variable

  1006         case LOCAL_VARIABLE:

  1007         // resource variable

  1008         case RESOURCE_VARIABLE:

  1009             databuf.appendChar(p.lvarOffset.length);  // for table length

  1010             for (int i = 0; i < p.lvarOffset.length; ++i) {

  1011                 databuf.appendChar(p.lvarOffset[i]);

  1012                 databuf.appendChar(p.lvarLength[i]);

  1013                 databuf.appendChar(p.lvarIndex[i]);

  1014             }

  1015             break;

  1016         // exception parameter

  1017         case EXCEPTION_PARAMETER:

  1018             databuf.appendByte(p.exception_index);

  1019             break;

  1020         // method receiver

  1021         case METHOD_RECEIVER:

  1022             // Do nothing

  1023             break;

  1024         // type parameter

  1025         case CLASS_TYPE_PARAMETER:

  1026         case METHOD_TYPE_PARAMETER:

  1027             databuf.appendByte(p.parameter_index);

  1028             break;

  1029         // type parameter bound

  1030         case CLASS_TYPE_PARAMETER_BOUND:

  1031         case METHOD_TYPE_PARAMETER_BOUND:

  1032             databuf.appendByte(p.parameter_index);

  1033             databuf.appendByte(p.bound_index);

  1034             break;

  1035         // class extends or implements clause

  1036         case CLASS_EXTENDS:

  1037             databuf.appendChar(p.type_index);

  1038             break;

  1039         // throws

  1040         case THROWS:

  1041             databuf.appendChar(p.type_index);

  1042             break;

  1043         // method parameter

  1044         case METHOD_FORMAL_PARAMETER:

  1045             databuf.appendByte(p.parameter_index);

  1046             break;

  1047         // method/constructor/reference type argument

  1048         case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:

  1049         case METHOD_INVOCATION_TYPE_ARGUMENT:

  1050         case METHOD_REFERENCE_TYPE_ARGUMENT:

  1051             databuf.appendChar(p.offset);

  1052             databuf.appendByte(p.type_index);

  1053             break;

  1054         // We don't need to worry about these

  1055         case METHOD_RETURN:

  1056         case FIELD:

  1057             break;

  1058         // lambda formal parameter

  1059         case LAMBDA_FORMAL_PARAMETER:

  1060             databuf.appendByte(p.parameter_index);

  1061             break;

  1062         case UNKNOWN:

  1063             throw new AssertionError("jvm.ClassWriter: UNKNOWN target type should never occur!");

  1064         default:

  1065             throw new AssertionError("jvm.ClassWriter: Unknown target type for position: " + p);

  1066         }

  1068         { // Append location data for generics/arrays.

  1069             databuf.appendByte(p.location.size());

  1070             java.util.List<Integer> loc = TypeAnnotationPosition.getBinaryFromTypePath(p.location);

  1071             for (int i : loc)

  1072                 databuf.appendByte((byte)i);

  1073         }

  1074     }

  1076 /**********************************************************************

  1077  * Writing Objects

  1078  **********************************************************************/

  1080     /** Enter an inner class into the `innerClasses' set/queue.

  1081      */

  1082     void enterInner(ClassSymbol c) {

  1083         if (c.type.isCompound()) {

  1084             throw new AssertionError("Unexpected intersection type: " + c.type);

  1085         }

  1086         try {

  1087             c.complete();

  1088         } catch (CompletionFailure ex) {

  1089             System.err.println("error: " + c + ": " + ex.getMessage());

  1090             throw ex;

  1091         }

  1092         if (!c.type.hasTag(CLASS)) return; // arrays

  1093         if (pool != null && // pool might be null if called from xClassName

  1094             c.owner.enclClass() != null &&

  1095             (innerClasses == null || !innerClasses.contains(c))) {

  1096 //          log.errWriter.println("enter inner " + c);//DEBUG

  1097             enterInner(c.owner.enclClass());

  1098             pool.put(c);

  1099             pool.put(c.name);

  1100             if (innerClasses == null) {

  1101                 innerClasses = new HashSet<ClassSymbol>();

  1102                 innerClassesQueue = new ListBuffer<ClassSymbol>();

  1103                 pool.put(names.InnerClasses);

  1104             }

  1105             innerClasses.add(c);

  1106             innerClassesQueue.append(c);

  1107         }

  1108     }

  1110     /** Write "inner classes" attribute.

  1111      */

  1112     void writeInnerClasses() {

  1113         int alenIdx = writeAttr(names.InnerClasses);

  1114         databuf.appendChar(innerClassesQueue.length());

  1115         for (List<ClassSymbol> l = innerClassesQueue.toList();

  1116              l.nonEmpty();

  1117              l = l.tail) {

  1118             ClassSymbol inner = l.head;

  1119             char flags = (char) adjustFlags(inner.flags_field);

  1120             if ((flags & INTERFACE) != 0) flags |= ABSTRACT; // Interfaces are always ABSTRACT

  1121             if (inner.name.isEmpty()) flags &= ~FINAL; // Anonymous class: unset FINAL flag

  1122             if (dumpInnerClassModifiers) {

  1123                 PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);

  1124                 pw.println("INNERCLASS  " + inner.name);

  1125                 pw.println("---" + flagNames(flags));

  1126             }

  1127             databuf.appendChar(pool.get(inner));

  1128             databuf.appendChar(

  1129                 inner.owner.kind == TYP ? pool.get(inner.owner) : 0);

  1130             databuf.appendChar(

  1131                 !inner.name.isEmpty() ? pool.get(inner.name) : 0);

  1132             databuf.appendChar(flags);

  1133         }

  1134         endAttr(alenIdx);

  1135     }

  1137     /** Write "bootstrapMethods" attribute.

  1138      */

  1139     void writeBootstrapMethods() {

  1140         int alenIdx = writeAttr(names.BootstrapMethods);

  1141         databuf.appendChar(bootstrapMethods.size());

  1142         for (Map.Entry<DynamicMethod, MethodHandle> entry : bootstrapMethods.entrySet()) {

  1143             DynamicMethod dmeth = entry.getKey();

  1144             DynamicMethodSymbol dsym = (DynamicMethodSymbol)dmeth.baseSymbol();

  1145             //write BSM handle

  1146             databuf.appendChar(pool.get(entry.getValue()));

  1147             //write static args length

  1148             databuf.appendChar(dsym.staticArgs.length);

  1149             //write static args array

  1150             Object[] uniqueArgs = dmeth.uniqueStaticArgs;

  1151             for (Object o : uniqueArgs) {

  1152                 databuf.appendChar(pool.get(o));

  1153             }

  1154         }

  1155         endAttr(alenIdx);

  1156     }

  1158     /** Write field symbol, entering all references into constant pool.

  1159      */

  1160     void writeField(VarSymbol v) {

  1161         int flags = adjustFlags(v.flags());

  1162         databuf.appendChar(flags);

  1163         if (dumpFieldModifiers) {

  1164             PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);

  1165             pw.println("FIELD  " + fieldName(v));

  1166             pw.println("---" + flagNames(v.flags()));

  1167         }

  1168         databuf.appendChar(pool.put(fieldName(v)));

  1169         databuf.appendChar(pool.put(typeSig(v.erasure(types))));

  1170         int acountIdx = beginAttrs();

  1171         int acount = 0;

  1172         if (v.getConstValue() != null) {

  1173             int alenIdx = writeAttr(names.ConstantValue);

  1174             databuf.appendChar(pool.put(v.getConstValue()));

  1175             endAttr(alenIdx);

  1176             acount++;

  1177         }

  1178         acount += writeMemberAttrs(v);

  1179         endAttrs(acountIdx, acount);

  1180     }

  1182     /** Write method symbol, entering all references into constant pool.

  1183      */

  1184     void writeMethod(MethodSymbol m) {

  1185         int flags = adjustFlags(m.flags());

  1186         databuf.appendChar(flags);

  1187         if (dumpMethodModifiers) {

  1188             PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);

  1189             pw.println("METHOD  " + fieldName(m));

  1190             pw.println("---" + flagNames(m.flags()));

  1191         }

  1192         databuf.appendChar(pool.put(fieldName(m)));

  1193         databuf.appendChar(pool.put(typeSig(m.externalType(types))));

  1194         int acountIdx = beginAttrs();

  1195         int acount = 0;

  1196         if (m.code != null) {

  1197             int alenIdx = writeAttr(names.Code);

  1198             writeCode(m.code);

  1199             m.code = null; // to conserve space

  1200             endAttr(alenIdx);

  1201             acount++;

  1202         }

  1203         List<Type> thrown = m.erasure(types).getThrownTypes();

  1204         if (thrown.nonEmpty()) {

  1205             int alenIdx = writeAttr(names.Exceptions);

  1206             databuf.appendChar(thrown.length());

  1207             for (List<Type> l = thrown; l.nonEmpty(); l = l.tail)

  1208                 databuf.appendChar(pool.put(l.head.tsym));

  1209             endAttr(alenIdx);

  1210             acount++;

  1211         }

  1212         if (m.defaultValue != null) {

  1213             int alenIdx = writeAttr(names.AnnotationDefault);

  1214             m.defaultValue.accept(awriter);

  1215             endAttr(alenIdx);

  1216             acount++;

  1217         }

  1218         if (options.isSet(PARAMETERS))

  1219             acount += writeMethodParametersAttr(m);

  1220         acount += writeMemberAttrs(m);

  1221         acount += writeParameterAttrs(m);

  1222         endAttrs(acountIdx, acount);

  1223     }

  1225     /** Write code attribute of method.

  1226      */

  1227     void writeCode(Code code) {

  1228         databuf.appendChar(code.max_stack);

  1229         databuf.appendChar(code.max_locals);

  1230         databuf.appendInt(code.cp);

  1231         databuf.appendBytes(code.code, 0, code.cp);

  1232         databuf.appendChar(code.catchInfo.length());

  1233         for (List<char[]> l = code.catchInfo.toList();

  1234              l.nonEmpty();

  1235              l = l.tail) {

  1236             for (int i = 0; i < l.head.length; i++)

  1237                 databuf.appendChar(l.head[i]);

  1238         }

  1239         int acountIdx = beginAttrs();

  1240         int acount = 0;

  1242         if (code.lineInfo.nonEmpty()) {

  1243             int alenIdx = writeAttr(names.LineNumberTable);

  1244             databuf.appendChar(code.lineInfo.length());

  1245             for (List<char[]> l = code.lineInfo.reverse();

  1246                  l.nonEmpty();

  1247                  l = l.tail)

  1248                 for (int i = 0; i < l.head.length; i++)

  1249                     databuf.appendChar(l.head[i]);

  1250             endAttr(alenIdx);

  1251             acount++;

  1252         }

  1254         if (genCrt && (code.crt != null)) {

  1255             CRTable crt = code.crt;

  1256             int alenIdx = writeAttr(names.CharacterRangeTable);

  1257             int crtIdx = beginAttrs();

  1258             int crtEntries = crt.writeCRT(databuf, code.lineMap, log);

  1259             endAttrs(crtIdx, crtEntries);

  1260             endAttr(alenIdx);

  1261             acount++;

  1262         }

  1264         // counter for number of generic local variables

  1265         int nGenericVars = 0;

  1267         if (code.varBufferSize > 0) {

  1268             int alenIdx = writeAttr(names.LocalVariableTable);

  1269             databuf.appendChar(code.varBufferSize);

  1271             for (int i=0; i<code.varBufferSize; i++) {

  1272                 Code.LocalVar var = code.varBuffer[i];

  1274                 // write variable info

  1275                 Assert.check(var.start_pc >= 0

  1276                         && var.start_pc <= code.cp);

  1277                 databuf.appendChar(var.start_pc);

  1278                 Assert.check(var.length >= 0

  1279                         && (var.start_pc + var.length) <= code.cp);

  1280                 databuf.appendChar(var.length);

  1281                 VarSymbol sym = var.sym;

  1282                 databuf.appendChar(pool.put(sym.name));

  1283                 Type vartype = sym.erasure(types);

  1284                 if (needsLocalVariableTypeEntry(sym.type))

  1285                     nGenericVars++;

  1286                 databuf.appendChar(pool.put(typeSig(vartype)));

  1287                 databuf.appendChar(var.reg);

  1288             }

  1289             endAttr(alenIdx);

  1290             acount++;

  1291         }

  1293         if (nGenericVars > 0) {

  1294             int alenIdx = writeAttr(names.LocalVariableTypeTable);

  1295             databuf.appendChar(nGenericVars);

  1296             int count = 0;

  1298             for (int i=0; i<code.varBufferSize; i++) {

  1299                 Code.LocalVar var = code.varBuffer[i];

  1300                 VarSymbol sym = var.sym;

  1301                 if (!needsLocalVariableTypeEntry(sym.type))

  1302                     continue;

  1303                 count++;

  1304                 // write variable info

  1305                 databuf.appendChar(var.start_pc);

  1306                 databuf.appendChar(var.length);

  1307                 databuf.appendChar(pool.put(sym.name));

  1308                 databuf.appendChar(pool.put(typeSig(sym.type)));

  1309                 databuf.appendChar(var.reg);

  1310             }

  1311             Assert.check(count == nGenericVars);

  1312             endAttr(alenIdx);

  1313             acount++;

  1314         }

  1316         if (code.stackMapBufferSize > 0) {

  1317             if (debugstackmap) System.out.println("Stack map for " + code.meth);

  1318             int alenIdx = writeAttr(code.stackMap.getAttributeName(names));

  1319             writeStackMap(code);

  1320             endAttr(alenIdx);

  1321             acount++;

  1322         }

  1323         endAttrs(acountIdx, acount);

  1324     }

  1325     //where

  1326     private boolean needsLocalVariableTypeEntry(Type t) {

  1327         //a local variable needs a type-entry if its type T is generic

  1328         //(i.e. |T| != T) and if it's not an intersection type (not supported

  1329         //in signature attribute grammar)

  1330         return (!types.isSameType(t, types.erasure(t)) &&

  1331                 !t.isCompound());

  1332     }

  1334     void writeStackMap(Code code) {

  1335         int nframes = code.stackMapBufferSize;

  1336         if (debugstackmap) System.out.println(" nframes = " + nframes);

  1337         databuf.appendChar(nframes);

  1339         switch (code.stackMap) {

  1340         case CLDC:

  1341             for (int i=0; i<nframes; i++) {

  1342                 if (debugstackmap) System.out.print("  " + i + ":");

  1343                 Code.StackMapFrame frame = code.stackMapBuffer[i];

  1345                 // output PC

  1346                 if (debugstackmap) System.out.print(" pc=" + frame.pc);

  1347                 databuf.appendChar(frame.pc);

  1349                 // output locals

  1350                 int localCount = 0;

  1351                 for (int j=0; j<frame.locals.length;

  1352                      j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {

  1353                     localCount++;

  1354                 }

  1355                 if (debugstackmap) System.out.print(" nlocals=" +

  1356                                                     localCount);

  1357                 databuf.appendChar(localCount);

  1358                 for (int j=0; j<frame.locals.length;

  1359                      j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.locals[j]))) {

  1360                     if (debugstackmap) System.out.print(" local[" + j + "]=");

  1361                     writeStackMapType(frame.locals[j]);

  1362                 }

  1364                 // output stack

  1365                 int stackCount = 0;

  1366                 for (int j=0; j<frame.stack.length;

  1367                      j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {

  1368                     stackCount++;

  1369                 }

  1370                 if (debugstackmap) System.out.print(" nstack=" +

  1371                                                     stackCount);

  1372                 databuf.appendChar(stackCount);

  1373                 for (int j=0; j<frame.stack.length;

  1374                      j += (target.generateEmptyAfterBig() ? 1 : Code.width(frame.stack[j]))) {

  1375                     if (debugstackmap) System.out.print(" stack[" + j + "]=");

  1376                     writeStackMapType(frame.stack[j]);

  1377                 }

  1378                 if (debugstackmap) System.out.println();

  1379             }

  1380             break;

  1381         case JSR202: {

  1382             Assert.checkNull(code.stackMapBuffer);

  1383             for (int i=0; i<nframes; i++) {

  1384                 if (debugstackmap) System.out.print("  " + i + ":");

  1385                 StackMapTableFrame frame = code.stackMapTableBuffer[i];

  1386                 frame.write(this);

  1387                 if (debugstackmap) System.out.println();

  1388             }

  1389             break;

  1390         }

  1391         default:

  1392             throw new AssertionError("Unexpected stackmap format value");

  1393         }

  1394     }

  1396         //where

  1397         void writeStackMapType(Type t) {

  1398             if (t == null) {

  1399                 if (debugstackmap) System.out.print("empty");

  1400                 databuf.appendByte(0);

  1401             }

  1402             else switch(t.getTag()) {

  1403             case BYTE:

  1404             case CHAR:

  1405             case SHORT:

  1406             case INT:

  1407             case BOOLEAN:

  1408                 if (debugstackmap) System.out.print("int");

  1409                 databuf.appendByte(1);

  1410                 break;

  1411             case FLOAT:

  1412                 if (debugstackmap) System.out.print("float");

  1413                 databuf.appendByte(2);

  1414                 break;

  1415             case DOUBLE:

  1416                 if (debugstackmap) System.out.print("double");

  1417                 databuf.appendByte(3);

  1418                 break;

  1419             case LONG:

  1420                 if (debugstackmap) System.out.print("long");

  1421                 databuf.appendByte(4);

  1422                 break;

  1423             case BOT: // null

  1424                 if (debugstackmap) System.out.print("null");

  1425                 databuf.appendByte(5);

  1426                 break;

  1427             case CLASS:

  1428             case ARRAY:

  1429                 if (debugstackmap) System.out.print("object(" + t + ")");

  1430                 databuf.appendByte(7);

  1431                 databuf.appendChar(pool.put(t));

  1432                 break;

  1433             case TYPEVAR:

  1434                 if (debugstackmap) System.out.print("object(" + types.erasure(t).tsym + ")");

  1435                 databuf.appendByte(7);

  1436                 databuf.appendChar(pool.put(types.erasure(t).tsym));

  1437                 break;

  1438             case UNINITIALIZED_THIS:

  1439                 if (debugstackmap) System.out.print("uninit_this");

  1440                 databuf.appendByte(6);

  1441                 break;

  1442             case UNINITIALIZED_OBJECT:

  1443                 { UninitializedType uninitType = (UninitializedType)t;

  1444                 databuf.appendByte(8);

  1445                 if (debugstackmap) System.out.print("uninit_object@" + uninitType.offset);

  1446                 databuf.appendChar(uninitType.offset);

  1447                 }

  1448                 break;

  1449             default:

  1450                 throw new AssertionError();

  1451             }

  1452         }

  1454     /** An entry in the JSR202 StackMapTable */

  1455     abstract static class StackMapTableFrame {

  1456         abstract int getFrameType();

  1458         void write(ClassWriter writer) {

  1459             int frameType = getFrameType();

  1460             writer.databuf.appendByte(frameType);

  1461             if (writer.debugstackmap) System.out.print(" frame_type=" + frameType);

  1462         }

  1464         static class SameFrame extends StackMapTableFrame {

  1465             final int offsetDelta;

  1466             SameFrame(int offsetDelta) {

  1467                 this.offsetDelta = offsetDelta;

  1468             }

  1469             int getFrameType() {

  1470                 return (offsetDelta < SAME_FRAME_SIZE) ? offsetDelta : SAME_FRAME_EXTENDED;

  1471             }

  1472             @Override

  1473             void write(ClassWriter writer) {

  1474                 super.write(writer);

  1475                 if (getFrameType() == SAME_FRAME_EXTENDED) {

  1476                     writer.databuf.appendChar(offsetDelta);

  1477                     if (writer.debugstackmap){

  1478                         System.out.print(" offset_delta=" + offsetDelta);

  1479                     }

  1480                 }

  1481             }

  1482         }

  1484         static class SameLocals1StackItemFrame extends StackMapTableFrame {

  1485             final int offsetDelta;

  1486             final Type stack;

  1487             SameLocals1StackItemFrame(int offsetDelta, Type stack) {

  1488                 this.offsetDelta = offsetDelta;

  1489                 this.stack = stack;

  1490             }

  1491             int getFrameType() {

  1492                 return (offsetDelta < SAME_FRAME_SIZE) ?

  1493                        (SAME_FRAME_SIZE + offsetDelta) :

  1494                        SAME_LOCALS_1_STACK_ITEM_EXTENDED;

  1495             }

  1496             @Override

  1497             void write(ClassWriter writer) {

  1498                 super.write(writer);

  1499                 if (getFrameType() == SAME_LOCALS_1_STACK_ITEM_EXTENDED) {

  1500                     writer.databuf.appendChar(offsetDelta);

  1501                     if (writer.debugstackmap) {

  1502                         System.out.print(" offset_delta=" + offsetDelta);

  1503                     }

  1504                 }

  1505                 if (writer.debugstackmap) {

  1506                     System.out.print(" stack[" + 0 + "]=");

  1507                 }

  1508                 writer.writeStackMapType(stack);

  1509             }

  1510         }

  1512         static class ChopFrame extends StackMapTableFrame {

  1513             final int frameType;

  1514             final int offsetDelta;

  1515             ChopFrame(int frameType, int offsetDelta) {

  1516                 this.frameType = frameType;

  1517                 this.offsetDelta = offsetDelta;

  1518             }

  1519             int getFrameType() { return frameType; }

  1520             @Override

  1521             void write(ClassWriter writer) {

  1522                 super.write(writer);

  1523                 writer.databuf.appendChar(offsetDelta);

  1524                 if (writer.debugstackmap) {

  1525                     System.out.print(" offset_delta=" + offsetDelta);

  1526                 }

  1527             }

  1528         }

  1530         static class AppendFrame extends StackMapTableFrame {

  1531             final int frameType;

  1532             final int offsetDelta;

  1533             final Type[] locals;

  1534             AppendFrame(int frameType, int offsetDelta, Type[] locals) {

  1535                 this.frameType = frameType;

  1536                 this.offsetDelta = offsetDelta;

  1537                 this.locals = locals;

  1538             }

  1539             int getFrameType() { return frameType; }

  1540             @Override

  1541             void write(ClassWriter writer) {

  1542                 super.write(writer);

  1543                 writer.databuf.appendChar(offsetDelta);

  1544                 if (writer.debugstackmap) {

  1545                     System.out.print(" offset_delta=" + offsetDelta);

  1546                 }

  1547                 for (int i=0; i<locals.length; i++) {

  1548                      if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");

  1549                      writer.writeStackMapType(locals[i]);

  1550                 }

  1551             }

  1552         }

  1554         static class FullFrame extends StackMapTableFrame {

  1555             final int offsetDelta;

  1556             final Type[] locals;

  1557             final Type[] stack;

  1558             FullFrame(int offsetDelta, Type[] locals, Type[] stack) {

  1559                 this.offsetDelta = offsetDelta;

  1560                 this.locals = locals;

  1561                 this.stack = stack;

  1562             }

  1563             int getFrameType() { return FULL_FRAME; }

  1564             @Override

  1565             void write(ClassWriter writer) {

  1566                 super.write(writer);

  1567                 writer.databuf.appendChar(offsetDelta);

  1568                 writer.databuf.appendChar(locals.length);

  1569                 if (writer.debugstackmap) {

  1570                     System.out.print(" offset_delta=" + offsetDelta);

  1571                     System.out.print(" nlocals=" + locals.length);

  1572                 }

  1573                 for (int i=0; i<locals.length; i++) {

  1574                     if (writer.debugstackmap) System.out.print(" locals[" + i + "]=");

  1575                     writer.writeStackMapType(locals[i]);

  1576                 }

  1578                 writer.databuf.appendChar(stack.length);

  1579                 if (writer.debugstackmap) { System.out.print(" nstack=" + stack.length); }

  1580                 for (int i=0; i<stack.length; i++) {

  1581                     if (writer.debugstackmap) System.out.print(" stack[" + i + "]=");

  1582                     writer.writeStackMapType(stack[i]);

  1583                 }

  1584             }

  1585         }

  1587        /** Compare this frame with the previous frame and produce

  1588         *  an entry of compressed stack map frame. */

  1589         static StackMapTableFrame getInstance(Code.StackMapFrame this_frame,

  1590                                               int prev_pc,

  1591                                               Type[] prev_locals,

  1592                                               Types types) {

  1593             Type[] locals = this_frame.locals;

  1594             Type[] stack = this_frame.stack;

  1595             int offset_delta = this_frame.pc - prev_pc - 1;

  1596             if (stack.length == 1) {

  1597                 if (locals.length == prev_locals.length

  1598                     && compare(prev_locals, locals, types) == 0) {

  1599                     return new SameLocals1StackItemFrame(offset_delta, stack[0]);

  1600                 }

  1601             } else if (stack.length == 0) {

  1602                 int diff_length = compare(prev_locals, locals, types);

  1603                 if (diff_length == 0) {

  1604                     return new SameFrame(offset_delta);

  1605                 } else if (-MAX_LOCAL_LENGTH_DIFF < diff_length && diff_length < 0) {

  1606                     // APPEND

  1607                     Type[] local_diff = new Type[-diff_length];

  1608                     for (int i=prev_locals.length, j=0; i<locals.length; i++,j++) {

  1609                         local_diff[j] = locals[i];

  1610                     }

  1611                     return new AppendFrame(SAME_FRAME_EXTENDED - diff_length,

  1612                                            offset_delta,

  1613                                            local_diff);

  1614                 } else if (0 < diff_length && diff_length < MAX_LOCAL_LENGTH_DIFF) {

  1615                     // CHOP

  1616                     return new ChopFrame(SAME_FRAME_EXTENDED - diff_length,

  1617                                          offset_delta);

  1618                 }

  1619             }

  1620             // FULL_FRAME

  1621             return new FullFrame(offset_delta, locals, stack);

  1622         }

  1624         static boolean isInt(Type t) {

  1625             return (t.getTag().isStrictSubRangeOf(INT)  || t.hasTag(BOOLEAN));

  1626         }

  1628         static boolean isSameType(Type t1, Type t2, Types types) {

  1629             if (t1 == null) { return t2 == null; }

  1630             if (t2 == null) { return false; }

  1632             if (isInt(t1) && isInt(t2)) { return true; }

  1634             if (t1.hasTag(UNINITIALIZED_THIS)) {

  1635                 return t2.hasTag(UNINITIALIZED_THIS);

  1636             } else if (t1.hasTag(UNINITIALIZED_OBJECT)) {

  1637                 if (t2.hasTag(UNINITIALIZED_OBJECT)) {

  1638                     return ((UninitializedType)t1).offset == ((UninitializedType)t2).offset;

  1639                 } else {

  1640                     return false;

  1641                 }

  1642             } else if (t2.hasTag(UNINITIALIZED_THIS) || t2.hasTag(UNINITIALIZED_OBJECT)) {

  1643                 return false;

  1644             }

  1646             return types.isSameType(t1, t2);

  1647         }

  1649         static int compare(Type[] arr1, Type[] arr2, Types types) {

  1650             int diff_length = arr1.length - arr2.length;

  1651             if (diff_length > MAX_LOCAL_LENGTH_DIFF || diff_length < -MAX_LOCAL_LENGTH_DIFF) {

  1652                 return Integer.MAX_VALUE;

  1653             }

  1654             int len = (diff_length > 0) ? arr2.length : arr1.length;

  1655             for (int i=0; i<len; i++) {

  1656                 if (!isSameType(arr1[i], arr2[i], types)) {

  1657                     return Integer.MAX_VALUE;

  1658                 }

  1659             }

  1660             return diff_length;

  1661         }

  1662     }

  1664     void writeFields(Scope.Entry e) {

  1665         // process them in reverse sibling order;

  1666         // i.e., process them in declaration order.

  1667         List<VarSymbol> vars = List.nil();

  1668         for (Scope.Entry i = e; i != null; i = i.sibling) {

  1669             if (i.sym.kind == VAR) vars = vars.prepend((VarSymbol)i.sym);

  1670         }

  1671         while (vars.nonEmpty()) {

  1672             writeField(vars.head);

  1673             vars = vars.tail;

  1674         }

  1675     }

  1677     void writeMethods(Scope.Entry e) {

  1678         List<MethodSymbol> methods = List.nil();

  1679         for (Scope.Entry i = e; i != null; i = i.sibling) {

  1680             if (i.sym.kind == MTH && (i.sym.flags() & HYPOTHETICAL) == 0)

  1681                 methods = methods.prepend((MethodSymbol)i.sym);

  1682         }

  1683         while (methods.nonEmpty()) {

  1684             writeMethod(methods.head);

  1685             methods = methods.tail;

  1686         }

  1687     }

  1689     /** Emit a class file for a given class.

  1690      *  @param c      The class from which a class file is generated.

  1691      */

  1692     public JavaFileObject writeClass(ClassSymbol c)

  1693         throws IOException, PoolOverflow, StringOverflow

  1694     {

  1695         JavaFileObject outFile

  1696             = fileManager.getJavaFileForOutput(CLASS_OUTPUT,

  1697                                                c.flatname.toString(),

  1698                                                JavaFileObject.Kind.CLASS,

  1699                                                c.sourcefile);

  1700         OutputStream out = outFile.openOutputStream();

  1701         try {

  1702             writeClassFile(out, c);

  1703             if (verbose)

  1704                 log.printVerbose("wrote.file", outFile);

  1705             out.close();

  1706             out = null;

  1707         } finally {

  1708             if (out != null) {

  1709                 // if we are propogating an exception, delete the file

  1710                 out.close();

  1711                 outFile.delete();

  1712                 outFile = null;

  1713             }

  1714         }

  1715         return outFile; // may be null if write failed

  1716     }

  1718     /** Write class `c' to outstream `out'.

  1719      */

  1720     public void writeClassFile(OutputStream out, ClassSymbol c)

  1721         throws IOException, PoolOverflow, StringOverflow {

  1722         Assert.check((c.flags() & COMPOUND) == 0);

  1723         databuf.reset();

  1724         poolbuf.reset();

  1725         sigbuf.reset();

  1726         pool = c.pool;

  1727         innerClasses = null;

  1728         innerClassesQueue = null;

  1729         bootstrapMethods = new LinkedHashMap<DynamicMethod, MethodHandle>();

  1731         Type supertype = types.supertype(c.type);

  1732         List<Type> interfaces = types.interfaces(c.type);

  1733         List<Type> typarams = c.type.getTypeArguments();

  1735         int flags = adjustFlags(c.flags() & ~DEFAULT);

  1736         if ((flags & PROTECTED) != 0) flags |= PUBLIC;

  1737         flags = flags & ClassFlags & ~STRICTFP;

  1738         if ((flags & INTERFACE) == 0) flags |= ACC_SUPER;

  1739         if (c.isInner() && c.name.isEmpty()) flags &= ~FINAL;

  1740         if (dumpClassModifiers) {

  1741             PrintWriter pw = log.getWriter(Log.WriterKind.ERROR);

  1742             pw.println();

  1743             pw.println("CLASSFILE  " + c.getQualifiedName());

  1744             pw.println("---" + flagNames(flags));

  1745         }

  1746         databuf.appendChar(flags);

  1748         databuf.appendChar(pool.put(c));

  1749         databuf.appendChar(supertype.hasTag(CLASS) ? pool.put(supertype.tsym) : 0);

  1750         databuf.appendChar(interfaces.length());

  1751         for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)

  1752             databuf.appendChar(pool.put(l.head.tsym));

  1753         int fieldsCount = 0;

  1754         int methodsCount = 0;

  1755         for (Scope.Entry e = c.members().elems; e != null; e = e.sibling) {

  1756             switch (e.sym.kind) {

  1757             case VAR: fieldsCount++; break;

  1758             case MTH: if ((e.sym.flags() & HYPOTHETICAL) == 0) methodsCount++;

  1759                       break;

  1760             case TYP: enterInner((ClassSymbol)e.sym); break;

  1761             default : Assert.error();

  1762             }

  1763         }

  1765         if (c.trans_local != null) {

  1766             for (ClassSymbol local : c.trans_local) {

  1767                 enterInner(local);

  1768             }

  1769         }

  1771         databuf.appendChar(fieldsCount);

  1772         writeFields(c.members().elems);

  1773         databuf.appendChar(methodsCount);

  1774         writeMethods(c.members().elems);

  1776         int acountIdx = beginAttrs();

  1777         int acount = 0;

  1779         boolean sigReq =

  1780             typarams.length() != 0 || supertype.allparams().length() != 0;

  1781         for (List<Type> l = interfaces; !sigReq && l.nonEmpty(); l = l.tail)

  1782             sigReq = l.head.allparams().length() != 0;

  1783         if (sigReq) {

  1784             Assert.check(source.allowGenerics());

  1785             int alenIdx = writeAttr(names.Signature);

  1786             if (typarams.length() != 0) assembleParamsSig(typarams);

  1787             assembleSig(supertype);

  1788             for (List<Type> l = interfaces; l.nonEmpty(); l = l.tail)

  1789                 assembleSig(l.head);

  1790             databuf.appendChar(pool.put(sigbuf.toName(names)));

  1791             sigbuf.reset();

  1792             endAttr(alenIdx);

  1793             acount++;

  1794         }

  1796         if (c.sourcefile != null && emitSourceFile) {

  1797             int alenIdx = writeAttr(names.SourceFile);

  1798             // WHM 6/29/1999: Strip file path prefix.  We do it here at

  1799             // the last possible moment because the sourcefile may be used

  1800             // elsewhere in error diagnostics. Fixes 4241573.

  1801             //databuf.appendChar(c.pool.put(c.sourcefile));

  1802             String simpleName = BaseFileObject.getSimpleName(c.sourcefile);

  1803             databuf.appendChar(c.pool.put(names.fromString(simpleName)));

  1804             endAttr(alenIdx);

  1805             acount++;

  1806         }

  1808         if (genCrt) {

  1809             // Append SourceID attribute

  1810             int alenIdx = writeAttr(names.SourceID);

  1811             databuf.appendChar(c.pool.put(names.fromString(Long.toString(getLastModified(c.sourcefile)))));

  1812             endAttr(alenIdx);

  1813             acount++;

  1814             // Append CompilationID attribute

  1815             alenIdx = writeAttr(names.CompilationID);

  1816             databuf.appendChar(c.pool.put(names.fromString(Long.toString(System.currentTimeMillis()))));

  1817             endAttr(alenIdx);

  1818             acount++;

  1819         }

  1821         acount += writeFlagAttrs(c.flags());

  1822         acount += writeJavaAnnotations(c.getRawAttributes());

  1823         acount += writeTypeAnnotations(c.getRawTypeAttributes());

  1824         acount += writeEnclosingMethodAttribute(c);

  1825         acount += writeExtraClassAttributes(c);

  1827         poolbuf.appendInt(JAVA_MAGIC);

  1828         poolbuf.appendChar(target.minorVersion);

  1829         poolbuf.appendChar(target.majorVersion);

  1831         writePool(c.pool);

  1833         if (innerClasses != null) {

  1834             writeInnerClasses();

  1835             acount++;

  1836         }

  1838         if (!bootstrapMethods.isEmpty()) {

  1839             writeBootstrapMethods();

  1840             acount++;

  1841         }

  1843         endAttrs(acountIdx, acount);

  1845         poolbuf.appendBytes(databuf.elems, 0, databuf.length);

  1846         out.write(poolbuf.elems, 0, poolbuf.length);

  1848         pool = c.pool = null; // to conserve space

  1849      }

  1851     /**Allows subclasses to write additional class attributes

  1852      *

  1853      * @return the number of attributes written

  1854      */

  1855     protected int writeExtraClassAttributes(ClassSymbol c) {

  1856         return 0;

  1857     }

  1859     int adjustFlags(final long flags) {

  1860         int result = (int)flags;

  1861         if ((flags & SYNTHETIC) != 0  && !target.useSyntheticFlag())

  1862             result &= ~SYNTHETIC;

  1863         if ((flags & ENUM) != 0  && !target.useEnumFlag())

  1864             result &= ~ENUM;

  1865         if ((flags & ANNOTATION) != 0  && !target.useAnnotationFlag())

  1866             result &= ~ANNOTATION;

  1868         if ((flags & BRIDGE) != 0  && target.useBridgeFlag())

  1869             result |= ACC_BRIDGE;

  1870         if ((flags & VARARGS) != 0  && target.useVarargsFlag())

  1871             result |= ACC_VARARGS;

  1872         if ((flags & DEFAULT) != 0)

  1873             result &= ~ABSTRACT;

  1874         return result;

  1875     }

  1877     long getLastModified(FileObject filename) {

  1878         long mod = 0;

  1879         try {

  1880             mod = filename.getLastModified();

  1881         } catch (SecurityException e) {

  1882             throw new AssertionError("CRT: couldn't get source file modification date: " + e.getMessage());

  1883         }

  1884         return mod;

  1885     }

  1886 }

Mercurial > jdk8-mips64-public > langtools / file revision

src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java@71f35e4b93a5

src/share/classes/com/sun/tools/javac/jvm/ClassWriter.java