aoqi@0: /*
darcy@2707:  * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.tools.javac.jvm;
aoqi@0: 
aoqi@0: import java.io.*;
aoqi@0: import java.net.URI;
aoqi@0: import java.net.URISyntaxException;
aoqi@0: import java.nio.CharBuffer;
aoqi@0: import java.util.Arrays;
aoqi@0: import java.util.EnumSet;
aoqi@0: import java.util.HashMap;
aoqi@0: import java.util.HashSet;
aoqi@0: import java.util.Map;
aoqi@0: import java.util.Set;
aoqi@0: import javax.lang.model.SourceVersion;
aoqi@0: import javax.tools.JavaFileObject;
aoqi@0: import javax.tools.JavaFileManager;
aoqi@0: import javax.tools.JavaFileManager.Location;
aoqi@0: import javax.tools.StandardJavaFileManager;
aoqi@0: 
aoqi@0: import static javax.tools.StandardLocation.*;
aoqi@0: 
aoqi@0: import com.sun.tools.javac.comp.Annotate;
aoqi@0: import com.sun.tools.javac.code.*;
aoqi@0: import com.sun.tools.javac.code.Lint.LintCategory;
aoqi@0: import com.sun.tools.javac.code.Type.*;
aoqi@0: import com.sun.tools.javac.code.Symbol.*;
aoqi@0: import com.sun.tools.javac.code.Symtab;
aoqi@0: import com.sun.tools.javac.file.BaseFileObject;
aoqi@0: import com.sun.tools.javac.util.*;
aoqi@0: import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
aoqi@0: 
aoqi@0: import static com.sun.tools.javac.code.Flags.*;
aoqi@0: import static com.sun.tools.javac.code.Kinds.*;
aoqi@0: import static com.sun.tools.javac.code.TypeTag.CLASS;
aoqi@0: import static com.sun.tools.javac.code.TypeTag.TYPEVAR;
aoqi@0: import static com.sun.tools.javac.jvm.ClassFile.*;
aoqi@0: import static com.sun.tools.javac.jvm.ClassFile.Version.*;
aoqi@0: 
aoqi@0: import static com.sun.tools.javac.main.Option.*;
aoqi@0: 
aoqi@0: /** This class provides operations to read a classfile into an internal
aoqi@0:  *  representation. The internal representation is anchored in a
aoqi@0:  *  ClassSymbol which contains in its scope symbol representations
aoqi@0:  *  for all other definitions in the classfile. Top-level Classes themselves
aoqi@0:  *  appear as members of the scopes of PackageSymbols.
aoqi@0:  *
aoqi@0:  *  <p><b>This is NOT part of any supported API.
aoqi@0:  *  If you write code that depends on this, you do so at your own risk.
aoqi@0:  *  This code and its internal interfaces are subject to change or
aoqi@0:  *  deletion without notice.</b>
aoqi@0:  */
aoqi@0: public class ClassReader {
aoqi@0:     /** The context key for the class reader. */
aoqi@0:     protected static final Context.Key<ClassReader> classReaderKey =
aoqi@0:         new Context.Key<ClassReader>();
aoqi@0: 
aoqi@0:     public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
aoqi@0: 
aoqi@0:     Annotate annotate;
aoqi@0: 
aoqi@0:     /** Switch: verbose output.
aoqi@0:      */
aoqi@0:     boolean verbose;
aoqi@0: 
aoqi@0:     /** Switch: check class file for correct minor version, unrecognized
aoqi@0:      *  attributes.
aoqi@0:      */
aoqi@0:     boolean checkClassFile;
aoqi@0: 
aoqi@0:     /** Switch: read constant pool and code sections. This switch is initially
aoqi@0:      *  set to false but can be turned on from outside.
aoqi@0:      */
aoqi@0:     public boolean readAllOfClassFile = false;
aoqi@0: 
aoqi@0:     /** Switch: read GJ signature information.
aoqi@0:      */
aoqi@0:     boolean allowGenerics;
aoqi@0: 
aoqi@0:     /** Switch: read varargs attribute.
aoqi@0:      */
aoqi@0:     boolean allowVarargs;
aoqi@0: 
aoqi@0:     /** Switch: allow annotations.
aoqi@0:      */
aoqi@0:     boolean allowAnnotations;
aoqi@0: 
aoqi@0:     /** Switch: allow simplified varargs.
aoqi@0:      */
aoqi@0:     boolean allowSimplifiedVarargs;
aoqi@0: 
aoqi@0:    /** Lint option: warn about classfile issues
aoqi@0:      */
aoqi@0:     boolean lintClassfile;
aoqi@0: 
aoqi@0:     /** Switch: preserve parameter names from the variable table.
aoqi@0:      */
aoqi@0:     public boolean saveParameterNames;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Switch: cache completion failures unless -XDdev is used
aoqi@0:      */
aoqi@0:     private boolean cacheCompletionFailure;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Switch: prefer source files instead of newer when both source
aoqi@0:      * and class are available
aoqi@0:      **/
aoqi@0:     public boolean preferSource;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * The currently selected profile.
aoqi@0:      */
aoqi@0:     public final Profile profile;
aoqi@0: 
aoqi@0:     /** The log to use for verbose output
aoqi@0:      */
aoqi@0:     final Log log;
aoqi@0: 
aoqi@0:     /** The symbol table. */
aoqi@0:     Symtab syms;
aoqi@0: 
aoqi@0:     Types types;
aoqi@0: 
aoqi@0:     /** The name table. */
aoqi@0:     final Names names;
aoqi@0: 
aoqi@0:     /** Force a completion failure on this name
aoqi@0:      */
aoqi@0:     final Name completionFailureName;
aoqi@0: 
aoqi@0:     /** Access to files
aoqi@0:      */
aoqi@0:     private final JavaFileManager fileManager;
aoqi@0: 
aoqi@0:     /** Factory for diagnostics
aoqi@0:      */
aoqi@0:     JCDiagnostic.Factory diagFactory;
aoqi@0: 
aoqi@0:     /** Can be reassigned from outside:
aoqi@0:      *  the completer to be used for ".java" files. If this remains unassigned
aoqi@0:      *  ".java" files will not be loaded.
aoqi@0:      */
aoqi@0:     public SourceCompleter sourceCompleter = null;
aoqi@0: 
aoqi@0:     /** A hashtable containing the encountered top-level and member classes,
aoqi@0:      *  indexed by flat names. The table does not contain local classes.
aoqi@0:      */
aoqi@0:     private Map<Name,ClassSymbol> classes;
aoqi@0: 
aoqi@0:     /** A hashtable containing the encountered packages.
aoqi@0:      */
aoqi@0:     private Map<Name, PackageSymbol> packages;
aoqi@0: 
aoqi@0:     /** The current scope where type variables are entered.
aoqi@0:      */
aoqi@0:     protected Scope typevars;
aoqi@0: 
aoqi@0:     /** The path name of the class file currently being read.
aoqi@0:      */
aoqi@0:     protected JavaFileObject currentClassFile = null;
aoqi@0: 
aoqi@0:     /** The class or method currently being read.
aoqi@0:      */
aoqi@0:     protected Symbol currentOwner = null;
aoqi@0: 
aoqi@0:     /** The buffer containing the currently read class file.
aoqi@0:      */
aoqi@0:     byte[] buf = new byte[INITIAL_BUFFER_SIZE];
aoqi@0: 
aoqi@0:     /** The current input pointer.
aoqi@0:      */
aoqi@0:     protected int bp;
aoqi@0: 
aoqi@0:     /** The objects of the constant pool.
aoqi@0:      */
aoqi@0:     Object[] poolObj;
aoqi@0: 
aoqi@0:     /** For every constant pool entry, an index into buf where the
aoqi@0:      *  defining section of the entry is found.
aoqi@0:      */
aoqi@0:     int[] poolIdx;
aoqi@0: 
aoqi@0:     /** The major version number of the class file being read. */
aoqi@0:     int majorVersion;
aoqi@0:     /** The minor version number of the class file being read. */
aoqi@0:     int minorVersion;
aoqi@0: 
aoqi@0:     /** A table to hold the constant pool indices for method parameter
aoqi@0:      * names, as given in LocalVariableTable attributes.
aoqi@0:      */
aoqi@0:     int[] parameterNameIndices;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Whether or not any parameter names have been found.
aoqi@0:      */
aoqi@0:     boolean haveParameterNameIndices;
aoqi@0: 
aoqi@0:     /** Set this to false every time we start reading a method
aoqi@0:      * and are saving parameter names.  Set it to true when we see
aoqi@0:      * MethodParameters, if it's set when we see a LocalVariableTable,
aoqi@0:      * then we ignore the parameter names from the LVT.
aoqi@0:      */
aoqi@0:     boolean sawMethodParameters;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * The set of attribute names for which warnings have been generated for the current class
aoqi@0:      */
aoqi@0:     Set<Name> warnedAttrs = new HashSet<Name>();
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Completer that delegates to the complete-method of this class.
aoqi@0:      */
aoqi@0:     private final Completer thisCompleter = new Completer() {
aoqi@0:         @Override
aoqi@0:         public void complete(Symbol sym) throws CompletionFailure {
aoqi@0:             ClassReader.this.complete(sym);
aoqi@0:         }
aoqi@0:     };
aoqi@0: 
aoqi@0: 
aoqi@0:     /** Get the ClassReader instance for this invocation. */
aoqi@0:     public static ClassReader instance(Context context) {
aoqi@0:         ClassReader instance = context.get(classReaderKey);
aoqi@0:         if (instance == null)
aoqi@0:             instance = new ClassReader(context, true);
aoqi@0:         return instance;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Initialize classes and packages, treating this as the definitive classreader. */
aoqi@0:     public void init(Symtab syms) {
aoqi@0:         init(syms, true);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Initialize classes and packages, optionally treating this as
aoqi@0:      *  the definitive classreader.
aoqi@0:      */
aoqi@0:     private void init(Symtab syms, boolean definitive) {
aoqi@0:         if (classes != null) return;
aoqi@0: 
aoqi@0:         if (definitive) {
aoqi@0:             Assert.check(packages == null || packages == syms.packages);
aoqi@0:             packages = syms.packages;
aoqi@0:             Assert.check(classes == null || classes == syms.classes);
aoqi@0:             classes = syms.classes;
aoqi@0:         } else {
aoqi@0:             packages = new HashMap<Name, PackageSymbol>();
aoqi@0:             classes = new HashMap<Name, ClassSymbol>();
aoqi@0:         }
aoqi@0: 
aoqi@0:         packages.put(names.empty, syms.rootPackage);
aoqi@0:         syms.rootPackage.completer = thisCompleter;
aoqi@0:         syms.unnamedPackage.completer = thisCompleter;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Construct a new class reader, optionally treated as the
aoqi@0:      *  definitive classreader for this invocation.
aoqi@0:      */
aoqi@0:     protected ClassReader(Context context, boolean definitive) {
aoqi@0:         if (definitive) context.put(classReaderKey, this);
aoqi@0: 
aoqi@0:         names = Names.instance(context);
aoqi@0:         syms = Symtab.instance(context);
aoqi@0:         types = Types.instance(context);
aoqi@0:         fileManager = context.get(JavaFileManager.class);
aoqi@0:         if (fileManager == null)
aoqi@0:             throw new AssertionError("FileManager initialization error");
aoqi@0:         diagFactory = JCDiagnostic.Factory.instance(context);
aoqi@0: 
aoqi@0:         init(syms, definitive);
aoqi@0:         log = Log.instance(context);
aoqi@0: 
aoqi@0:         Options options = Options.instance(context);
aoqi@0:         annotate = Annotate.instance(context);
aoqi@0:         verbose        = options.isSet(VERBOSE);
aoqi@0:         checkClassFile = options.isSet("-checkclassfile");
aoqi@0: 
aoqi@0:         Source source = Source.instance(context);
aoqi@0:         allowGenerics    = source.allowGenerics();
aoqi@0:         allowVarargs     = source.allowVarargs();
aoqi@0:         allowAnnotations = source.allowAnnotations();
aoqi@0:         allowSimplifiedVarargs = source.allowSimplifiedVarargs();
aoqi@0: 
aoqi@0:         saveParameterNames = options.isSet("save-parameter-names");
aoqi@0:         cacheCompletionFailure = options.isUnset("dev");
aoqi@0:         preferSource = "source".equals(options.get("-Xprefer"));
aoqi@0: 
aoqi@0:         profile = Profile.instance(context);
aoqi@0: 
aoqi@0:         completionFailureName =
aoqi@0:             options.isSet("failcomplete")
aoqi@0:             ? names.fromString(options.get("failcomplete"))
aoqi@0:             : null;
aoqi@0: 
aoqi@0:         typevars = new Scope(syms.noSymbol);
aoqi@0: 
aoqi@0:         lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
aoqi@0: 
aoqi@0:         initAttributeReaders();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Add member to class unless it is synthetic.
aoqi@0:      */
aoqi@0:     private void enterMember(ClassSymbol c, Symbol sym) {
aoqi@0:         // Synthetic members are not entered -- reason lost to history (optimization?).
aoqi@0:         // Lambda methods must be entered because they may have inner classes (which reference them)
aoqi@0:         if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
aoqi@0:             c.members_field.enter(sym);
aoqi@0:     }
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Error Diagnoses
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0: 
aoqi@0:     public class BadClassFile extends CompletionFailure {
aoqi@0:         private static final long serialVersionUID = 0;
aoqi@0: 
aoqi@0:         public BadClassFile(TypeSymbol sym, JavaFileObject file, JCDiagnostic diag) {
aoqi@0:             super(sym, createBadClassFileDiagnostic(file, diag));
aoqi@0:         }
aoqi@0:     }
aoqi@0:     // where
aoqi@0:     private JCDiagnostic createBadClassFileDiagnostic(JavaFileObject file, JCDiagnostic diag) {
aoqi@0:         String key = (file.getKind() == JavaFileObject.Kind.SOURCE
aoqi@0:                     ? "bad.source.file.header" : "bad.class.file.header");
aoqi@0:         return diagFactory.fragment(key, file, diag);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public BadClassFile badClassFile(String key, Object... args) {
aoqi@0:         return new BadClassFile (
aoqi@0:             currentOwner.enclClass(),
aoqi@0:             currentClassFile,
aoqi@0:             diagFactory.fragment(key, args));
aoqi@0:     }
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Buffer Access
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0:     /** Read a character.
aoqi@0:      */
aoqi@0:     char nextChar() {
aoqi@0:         return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read a byte.
aoqi@0:      */
aoqi@0:     int nextByte() {
aoqi@0:         return buf[bp++] & 0xFF;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read an integer.
aoqi@0:      */
aoqi@0:     int nextInt() {
aoqi@0:         return
aoqi@0:             ((buf[bp++] & 0xFF) << 24) +
aoqi@0:             ((buf[bp++] & 0xFF) << 16) +
aoqi@0:             ((buf[bp++] & 0xFF) << 8) +
aoqi@0:             (buf[bp++] & 0xFF);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Extract a character at position bp from buf.
aoqi@0:      */
aoqi@0:     char getChar(int bp) {
aoqi@0:         return
aoqi@0:             (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Extract an integer at position bp from buf.
aoqi@0:      */
aoqi@0:     int getInt(int bp) {
aoqi@0:         return
aoqi@0:             ((buf[bp] & 0xFF) << 24) +
aoqi@0:             ((buf[bp+1] & 0xFF) << 16) +
aoqi@0:             ((buf[bp+2] & 0xFF) << 8) +
aoqi@0:             (buf[bp+3] & 0xFF);
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     /** Extract a long integer at position bp from buf.
aoqi@0:      */
aoqi@0:     long getLong(int bp) {
aoqi@0:         DataInputStream bufin =
aoqi@0:             new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
aoqi@0:         try {
aoqi@0:             return bufin.readLong();
aoqi@0:         } catch (IOException e) {
aoqi@0:             throw new AssertionError(e);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Extract a float at position bp from buf.
aoqi@0:      */
aoqi@0:     float getFloat(int bp) {
aoqi@0:         DataInputStream bufin =
aoqi@0:             new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
aoqi@0:         try {
aoqi@0:             return bufin.readFloat();
aoqi@0:         } catch (IOException e) {
aoqi@0:             throw new AssertionError(e);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Extract a double at position bp from buf.
aoqi@0:      */
aoqi@0:     double getDouble(int bp) {
aoqi@0:         DataInputStream bufin =
aoqi@0:             new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
aoqi@0:         try {
aoqi@0:             return bufin.readDouble();
aoqi@0:         } catch (IOException e) {
aoqi@0:             throw new AssertionError(e);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Constant Pool Access
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0:     /** Index all constant pool entries, writing their start addresses into
aoqi@0:      *  poolIdx.
aoqi@0:      */
aoqi@0:     void indexPool() {
aoqi@0:         poolIdx = new int[nextChar()];
aoqi@0:         poolObj = new Object[poolIdx.length];
aoqi@0:         int i = 1;
aoqi@0:         while (i < poolIdx.length) {
aoqi@0:             poolIdx[i++] = bp;
aoqi@0:             byte tag = buf[bp++];
aoqi@0:             switch (tag) {
aoqi@0:             case CONSTANT_Utf8: case CONSTANT_Unicode: {
aoqi@0:                 int len = nextChar();
aoqi@0:                 bp = bp + len;
aoqi@0:                 break;
aoqi@0:             }
aoqi@0:             case CONSTANT_Class:
aoqi@0:             case CONSTANT_String:
aoqi@0:             case CONSTANT_MethodType:
aoqi@0:                 bp = bp + 2;
aoqi@0:                 break;
aoqi@0:             case CONSTANT_MethodHandle:
aoqi@0:                 bp = bp + 3;
aoqi@0:                 break;
aoqi@0:             case CONSTANT_Fieldref:
aoqi@0:             case CONSTANT_Methodref:
aoqi@0:             case CONSTANT_InterfaceMethodref:
aoqi@0:             case CONSTANT_NameandType:
aoqi@0:             case CONSTANT_Integer:
aoqi@0:             case CONSTANT_Float:
aoqi@0:             case CONSTANT_InvokeDynamic:
aoqi@0:                 bp = bp + 4;
aoqi@0:                 break;
aoqi@0:             case CONSTANT_Long:
aoqi@0:             case CONSTANT_Double:
aoqi@0:                 bp = bp + 8;
aoqi@0:                 i++;
aoqi@0:                 break;
aoqi@0:             default:
aoqi@0:                 throw badClassFile("bad.const.pool.tag.at",
aoqi@0:                                    Byte.toString(tag),
aoqi@0:                                    Integer.toString(bp -1));
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read constant pool entry at start address i, use pool as a cache.
aoqi@0:      */
aoqi@0:     Object readPool(int i) {
aoqi@0:         Object result = poolObj[i];
aoqi@0:         if (result != null) return result;
aoqi@0: 
aoqi@0:         int index = poolIdx[i];
aoqi@0:         if (index == 0) return null;
aoqi@0: 
aoqi@0:         byte tag = buf[index];
aoqi@0:         switch (tag) {
aoqi@0:         case CONSTANT_Utf8:
aoqi@0:             poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
aoqi@0:             break;
aoqi@0:         case CONSTANT_Unicode:
aoqi@0:             throw badClassFile("unicode.str.not.supported");
aoqi@0:         case CONSTANT_Class:
aoqi@0:             poolObj[i] = readClassOrType(getChar(index + 1));
aoqi@0:             break;
aoqi@0:         case CONSTANT_String:
aoqi@0:             // FIXME: (footprint) do not use toString here
aoqi@0:             poolObj[i] = readName(getChar(index + 1)).toString();
aoqi@0:             break;
aoqi@0:         case CONSTANT_Fieldref: {
aoqi@0:             ClassSymbol owner = readClassSymbol(getChar(index + 1));
aoqi@0:             NameAndType nt = readNameAndType(getChar(index + 3));
aoqi@0:             poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
aoqi@0:             break;
aoqi@0:         }
aoqi@0:         case CONSTANT_Methodref:
aoqi@0:         case CONSTANT_InterfaceMethodref: {
aoqi@0:             ClassSymbol owner = readClassSymbol(getChar(index + 1));
aoqi@0:             NameAndType nt = readNameAndType(getChar(index + 3));
aoqi@0:             poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
aoqi@0:             break;
aoqi@0:         }
aoqi@0:         case CONSTANT_NameandType:
aoqi@0:             poolObj[i] = new NameAndType(
aoqi@0:                 readName(getChar(index + 1)),
aoqi@0:                 readType(getChar(index + 3)), types);
aoqi@0:             break;
aoqi@0:         case CONSTANT_Integer:
aoqi@0:             poolObj[i] = getInt(index + 1);
aoqi@0:             break;
aoqi@0:         case CONSTANT_Float:
aoqi@0:             poolObj[i] = new Float(getFloat(index + 1));
aoqi@0:             break;
aoqi@0:         case CONSTANT_Long:
aoqi@0:             poolObj[i] = new Long(getLong(index + 1));
aoqi@0:             break;
aoqi@0:         case CONSTANT_Double:
aoqi@0:             poolObj[i] = new Double(getDouble(index + 1));
aoqi@0:             break;
aoqi@0:         case CONSTANT_MethodHandle:
aoqi@0:             skipBytes(4);
aoqi@0:             break;
aoqi@0:         case CONSTANT_MethodType:
aoqi@0:             skipBytes(3);
aoqi@0:             break;
aoqi@0:         case CONSTANT_InvokeDynamic:
aoqi@0:             skipBytes(5);
aoqi@0:             break;
aoqi@0:         default:
aoqi@0:             throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
aoqi@0:         }
aoqi@0:         return poolObj[i];
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read signature and convert to type.
aoqi@0:      */
aoqi@0:     Type readType(int i) {
aoqi@0:         int index = poolIdx[i];
aoqi@0:         return sigToType(buf, index + 3, getChar(index + 1));
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** If name is an array type or class signature, return the
aoqi@0:      *  corresponding type; otherwise return a ClassSymbol with given name.
aoqi@0:      */
aoqi@0:     Object readClassOrType(int i) {
aoqi@0:         int index =  poolIdx[i];
aoqi@0:         int len = getChar(index + 1);
aoqi@0:         int start = index + 3;
aoqi@0:         Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
aoqi@0:         // by the above assertion, the following test can be
aoqi@0:         // simplified to (buf[start] == '[')
aoqi@0:         return (buf[start] == '[' || buf[start + len - 1] == ';')
aoqi@0:             ? (Object)sigToType(buf, start, len)
aoqi@0:             : (Object)enterClass(names.fromUtf(internalize(buf, start,
aoqi@0:                                                            len)));
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read signature and convert to type parameters.
aoqi@0:      */
aoqi@0:     List<Type> readTypeParams(int i) {
aoqi@0:         int index = poolIdx[i];
aoqi@0:         return sigToTypeParams(buf, index + 3, getChar(index + 1));
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read class entry.
aoqi@0:      */
aoqi@0:     ClassSymbol readClassSymbol(int i) {
aoqi@0:         Object obj = readPool(i);
aoqi@0:         if (obj != null && !(obj instanceof ClassSymbol))
aoqi@0:             throw badClassFile("bad.const.pool.entry",
aoqi@0:                                currentClassFile.toString(),
aoqi@0:                                "CONSTANT_Class_info", i);
aoqi@0:         return (ClassSymbol)obj;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read name.
aoqi@0:      */
aoqi@0:     Name readName(int i) {
aoqi@0:         Object obj = readPool(i);
aoqi@0:         if (obj != null && !(obj instanceof Name))
aoqi@0:             throw badClassFile("bad.const.pool.entry",
aoqi@0:                                currentClassFile.toString(),
aoqi@0:                                "CONSTANT_Utf8_info or CONSTANT_String_info", i);
aoqi@0:         return (Name)obj;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read name and type.
aoqi@0:      */
aoqi@0:     NameAndType readNameAndType(int i) {
aoqi@0:         Object obj = readPool(i);
aoqi@0:         if (obj != null && !(obj instanceof NameAndType))
aoqi@0:             throw badClassFile("bad.const.pool.entry",
aoqi@0:                                currentClassFile.toString(),
aoqi@0:                                "CONSTANT_NameAndType_info", i);
aoqi@0:         return (NameAndType)obj;
aoqi@0:     }
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Reading Types
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0:     /** The unread portion of the currently read type is
aoqi@0:      *  signature[sigp..siglimit-1].
aoqi@0:      */
aoqi@0:     byte[] signature;
aoqi@0:     int sigp;
aoqi@0:     int siglimit;
aoqi@0:     boolean sigEnterPhase = false;
aoqi@0: 
aoqi@0:     /** Convert signature to type, where signature is a byte array segment.
aoqi@0:      */
aoqi@0:     Type sigToType(byte[] sig, int offset, int len) {
aoqi@0:         signature = sig;
aoqi@0:         sigp = offset;
aoqi@0:         siglimit = offset + len;
aoqi@0:         return sigToType();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Convert signature to type, where signature is implicit.
aoqi@0:      */
aoqi@0:     Type sigToType() {
aoqi@0:         switch ((char) signature[sigp]) {
aoqi@0:         case 'T':
aoqi@0:             sigp++;
aoqi@0:             int start = sigp;
aoqi@0:             while (signature[sigp] != ';') sigp++;
aoqi@0:             sigp++;
aoqi@0:             return sigEnterPhase
aoqi@0:                 ? Type.noType
aoqi@0:                 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
aoqi@0:         case '+': {
aoqi@0:             sigp++;
aoqi@0:             Type t = sigToType();
aoqi@0:             return new WildcardType(t, BoundKind.EXTENDS,
aoqi@0:                                     syms.boundClass);
aoqi@0:         }
aoqi@0:         case '*':
aoqi@0:             sigp++;
aoqi@0:             return new WildcardType(syms.objectType, BoundKind.UNBOUND,
aoqi@0:                                     syms.boundClass);
aoqi@0:         case '-': {
aoqi@0:             sigp++;
aoqi@0:             Type t = sigToType();
aoqi@0:             return new WildcardType(t, BoundKind.SUPER,
aoqi@0:                                     syms.boundClass);
aoqi@0:         }
aoqi@0:         case 'B':
aoqi@0:             sigp++;
aoqi@0:             return syms.byteType;
aoqi@0:         case 'C':
aoqi@0:             sigp++;
aoqi@0:             return syms.charType;
aoqi@0:         case 'D':
aoqi@0:             sigp++;
aoqi@0:             return syms.doubleType;
aoqi@0:         case 'F':
aoqi@0:             sigp++;
aoqi@0:             return syms.floatType;
aoqi@0:         case 'I':
aoqi@0:             sigp++;
aoqi@0:             return syms.intType;
aoqi@0:         case 'J':
aoqi@0:             sigp++;
aoqi@0:             return syms.longType;
aoqi@0:         case 'L':
aoqi@0:             {
aoqi@0:                 // int oldsigp = sigp;
aoqi@0:                 Type t = classSigToType();
aoqi@0:                 if (sigp < siglimit && signature[sigp] == '.')
aoqi@0:                     throw badClassFile("deprecated inner class signature syntax " +
aoqi@0:                                        "(please recompile from source)");
aoqi@0:                 /*
aoqi@0:                 System.err.println(" decoded " +
aoqi@0:                                    new String(signature, oldsigp, sigp-oldsigp) +
aoqi@0:                                    " => " + t + " outer " + t.outer());
aoqi@0:                 */
aoqi@0:                 return t;
aoqi@0:             }
aoqi@0:         case 'S':
aoqi@0:             sigp++;
aoqi@0:             return syms.shortType;
aoqi@0:         case 'V':
aoqi@0:             sigp++;
aoqi@0:             return syms.voidType;
aoqi@0:         case 'Z':
aoqi@0:             sigp++;
aoqi@0:             return syms.booleanType;
aoqi@0:         case '[':
aoqi@0:             sigp++;
aoqi@0:             return new ArrayType(sigToType(), syms.arrayClass);
aoqi@0:         case '(':
aoqi@0:             sigp++;
aoqi@0:             List<Type> argtypes = sigToTypes(')');
aoqi@0:             Type restype = sigToType();
aoqi@0:             List<Type> thrown = List.nil();
aoqi@0:             while (signature[sigp] == '^') {
aoqi@0:                 sigp++;
aoqi@0:                 thrown = thrown.prepend(sigToType());
aoqi@0:             }
aoqi@0:             // if there is a typevar in the throws clause we should state it.
aoqi@0:             for (List<Type> l = thrown; l.nonEmpty(); l = l.tail) {
aoqi@0:                 if (l.head.hasTag(TYPEVAR)) {
aoqi@0:                     l.head.tsym.flags_field |= THROWS;
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return new MethodType(argtypes,
aoqi@0:                                   restype,
aoqi@0:                                   thrown.reverse(),
aoqi@0:                                   syms.methodClass);
aoqi@0:         case '<':
aoqi@0:             typevars = typevars.dup(currentOwner);
aoqi@0:             Type poly = new ForAll(sigToTypeParams(), sigToType());
aoqi@0:             typevars = typevars.leave();
aoqi@0:             return poly;
aoqi@0:         default:
aoqi@0:             throw badClassFile("bad.signature",
aoqi@0:                                Convert.utf2string(signature, sigp, 10));
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     byte[] signatureBuffer = new byte[0];
aoqi@0:     int sbp = 0;
aoqi@0:     /** Convert class signature to type, where signature is implicit.
aoqi@0:      */
aoqi@0:     Type classSigToType() {
aoqi@0:         if (signature[sigp] != 'L')
aoqi@0:             throw badClassFile("bad.class.signature",
aoqi@0:                                Convert.utf2string(signature, sigp, 10));
aoqi@0:         sigp++;
aoqi@0:         Type outer = Type.noType;
aoqi@0:         int startSbp = sbp;
aoqi@0: 
aoqi@0:         while (true) {
aoqi@0:             final byte c = signature[sigp++];
aoqi@0:             switch (c) {
aoqi@0: 
aoqi@0:             case ';': {         // end
aoqi@0:                 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
aoqi@0:                                                          startSbp,
aoqi@0:                                                          sbp - startSbp));
aoqi@0: 
aoqi@0:                 try {
aoqi@0:                     return (outer == Type.noType) ?
aoqi@0:                             t.erasure(types) :
aoqi@0:                             new ClassType(outer, List.<Type>nil(), t);
aoqi@0:                 } finally {
aoqi@0:                     sbp = startSbp;
aoqi@0:                 }
aoqi@0:             }
aoqi@0: 
aoqi@0:             case '<':           // generic arguments
aoqi@0:                 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
aoqi@0:                                                          startSbp,
aoqi@0:                                                          sbp - startSbp));
aoqi@0:                 outer = new ClassType(outer, sigToTypes('>'), t) {
aoqi@0:                         boolean completed = false;
aoqi@0:                         @Override
aoqi@0:                         public Type getEnclosingType() {
aoqi@0:                             if (!completed) {
aoqi@0:                                 completed = true;
aoqi@0:                                 tsym.complete();
aoqi@0:                                 Type enclosingType = tsym.type.getEnclosingType();
aoqi@0:                                 if (enclosingType != Type.noType) {
aoqi@0:                                     List<Type> typeArgs =
aoqi@0:                                         super.getEnclosingType().allparams();
aoqi@0:                                     List<Type> typeParams =
aoqi@0:                                         enclosingType.allparams();
aoqi@0:                                     if (typeParams.length() != typeArgs.length()) {
aoqi@0:                                         // no "rare" types
aoqi@0:                                         super.setEnclosingType(types.erasure(enclosingType));
aoqi@0:                                     } else {
aoqi@0:                                         super.setEnclosingType(types.subst(enclosingType,
aoqi@0:                                                                            typeParams,
aoqi@0:                                                                            typeArgs));
aoqi@0:                                     }
aoqi@0:                                 } else {
aoqi@0:                                     super.setEnclosingType(Type.noType);
aoqi@0:                                 }
aoqi@0:                             }
aoqi@0:                             return super.getEnclosingType();
aoqi@0:                         }
aoqi@0:                         @Override
aoqi@0:                         public void setEnclosingType(Type outer) {
aoqi@0:                             throw new UnsupportedOperationException();
aoqi@0:                         }
aoqi@0:                     };
aoqi@0:                 switch (signature[sigp++]) {
aoqi@0:                 case ';':
aoqi@0:                     if (sigp < signature.length && signature[sigp] == '.') {
aoqi@0:                         // support old-style GJC signatures
aoqi@0:                         // The signature produced was
aoqi@0:                         // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
aoqi@0:                         // rather than say
aoqi@0:                         // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
aoqi@0:                         // so we skip past ".Lfoo/Outer$"
aoqi@0:                         sigp += (sbp - startSbp) + // "foo/Outer"
aoqi@0:                             3;  // ".L" and "$"
aoqi@0:                         signatureBuffer[sbp++] = (byte)'$';
aoqi@0:                         break;
aoqi@0:                     } else {
aoqi@0:                         sbp = startSbp;
aoqi@0:                         return outer;
aoqi@0:                     }
aoqi@0:                 case '.':
aoqi@0:                     signatureBuffer[sbp++] = (byte)'$';
aoqi@0:                     break;
aoqi@0:                 default:
aoqi@0:                     throw new AssertionError(signature[sigp-1]);
aoqi@0:                 }
aoqi@0:                 continue;
aoqi@0: 
aoqi@0:             case '.':
aoqi@0:                 //we have seen an enclosing non-generic class
aoqi@0:                 if (outer != Type.noType) {
aoqi@0:                     t = enterClass(names.fromUtf(signatureBuffer,
aoqi@0:                                                  startSbp,
aoqi@0:                                                  sbp - startSbp));
aoqi@0:                     outer = new ClassType(outer, List.<Type>nil(), t);
aoqi@0:                 }
aoqi@0:                 signatureBuffer[sbp++] = (byte)'$';
aoqi@0:                 continue;
aoqi@0:             case '/':
aoqi@0:                 signatureBuffer[sbp++] = (byte)'.';
aoqi@0:                 continue;
aoqi@0:             default:
aoqi@0:                 signatureBuffer[sbp++] = c;
aoqi@0:                 continue;
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Convert (implicit) signature to list of types
aoqi@0:      *  until `terminator' is encountered.
aoqi@0:      */
aoqi@0:     List<Type> sigToTypes(char terminator) {
aoqi@0:         List<Type> head = List.of(null);
aoqi@0:         List<Type> tail = head;
aoqi@0:         while (signature[sigp] != terminator)
aoqi@0:             tail = tail.setTail(List.of(sigToType()));
aoqi@0:         sigp++;
aoqi@0:         return head.tail;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Convert signature to type parameters, where signature is a byte
aoqi@0:      *  array segment.
aoqi@0:      */
aoqi@0:     List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
aoqi@0:         signature = sig;
aoqi@0:         sigp = offset;
aoqi@0:         siglimit = offset + len;
aoqi@0:         return sigToTypeParams();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Convert signature to type parameters, where signature is implicit.
aoqi@0:      */
aoqi@0:     List<Type> sigToTypeParams() {
aoqi@0:         List<Type> tvars = List.nil();
aoqi@0:         if (signature[sigp] == '<') {
aoqi@0:             sigp++;
aoqi@0:             int start = sigp;
aoqi@0:             sigEnterPhase = true;
aoqi@0:             while (signature[sigp] != '>')
aoqi@0:                 tvars = tvars.prepend(sigToTypeParam());
aoqi@0:             sigEnterPhase = false;
aoqi@0:             sigp = start;
aoqi@0:             while (signature[sigp] != '>')
aoqi@0:                 sigToTypeParam();
aoqi@0:             sigp++;
aoqi@0:         }
aoqi@0:         return tvars.reverse();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Convert (implicit) signature to type parameter.
aoqi@0:      */
aoqi@0:     Type sigToTypeParam() {
aoqi@0:         int start = sigp;
aoqi@0:         while (signature[sigp] != ':') sigp++;
aoqi@0:         Name name = names.fromUtf(signature, start, sigp - start);
aoqi@0:         TypeVar tvar;
aoqi@0:         if (sigEnterPhase) {
aoqi@0:             tvar = new TypeVar(name, currentOwner, syms.botType);
aoqi@0:             typevars.enter(tvar.tsym);
aoqi@0:         } else {
aoqi@0:             tvar = (TypeVar)findTypeVar(name);
aoqi@0:         }
aoqi@0:         List<Type> bounds = List.nil();
aoqi@0:         boolean allInterfaces = false;
aoqi@0:         if (signature[sigp] == ':' && signature[sigp+1] == ':') {
aoqi@0:             sigp++;
aoqi@0:             allInterfaces = true;
aoqi@0:         }
aoqi@0:         while (signature[sigp] == ':') {
aoqi@0:             sigp++;
aoqi@0:             bounds = bounds.prepend(sigToType());
aoqi@0:         }
aoqi@0:         if (!sigEnterPhase) {
aoqi@0:             types.setBounds(tvar, bounds.reverse(), allInterfaces);
aoqi@0:         }
aoqi@0:         return tvar;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Find type variable with given name in `typevars' scope.
aoqi@0:      */
aoqi@0:     Type findTypeVar(Name name) {
aoqi@0:         Scope.Entry e = typevars.lookup(name);
aoqi@0:         if (e.scope != null) {
aoqi@0:             return e.sym.type;
aoqi@0:         } else {
aoqi@0:             if (readingClassAttr) {
aoqi@0:                 // While reading the class attribute, the supertypes
aoqi@0:                 // might refer to a type variable from an enclosing element
aoqi@0:                 // (method or class).
aoqi@0:                 // If the type variable is defined in the enclosing class,
aoqi@0:                 // we can actually find it in
aoqi@0:                 // currentOwner.owner.type.getTypeArguments()
aoqi@0:                 // However, until we have read the enclosing method attribute
aoqi@0:                 // we don't know for sure if this owner is correct.  It could
aoqi@0:                 // be a method and there is no way to tell before reading the
aoqi@0:                 // enclosing method attribute.
aoqi@0:                 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
aoqi@0:                 missingTypeVariables = missingTypeVariables.prepend(t);
aoqi@0:                 // System.err.println("Missing type var " + name);
aoqi@0:                 return t;
aoqi@0:             }
aoqi@0:             throw badClassFile("undecl.type.var", name);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Reading Attributes
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0:     protected enum AttributeKind { CLASS, MEMBER };
aoqi@0:     protected abstract class AttributeReader {
aoqi@0:         protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
aoqi@0:             this.name = name;
aoqi@0:             this.version = version;
aoqi@0:             this.kinds = kinds;
aoqi@0:         }
aoqi@0: 
aoqi@0:         protected boolean accepts(AttributeKind kind) {
aoqi@0:             if (kinds.contains(kind)) {
aoqi@0:                 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
aoqi@0:                     return true;
aoqi@0: 
aoqi@0:                 if (lintClassfile && !warnedAttrs.contains(name)) {
aoqi@0:                     JavaFileObject prev = log.useSource(currentClassFile);
aoqi@0:                     try {
aoqi@0:                         log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr",
aoqi@0:                                 name, version.major, version.minor, majorVersion, minorVersion);
aoqi@0:                     } finally {
aoqi@0:                         log.useSource(prev);
aoqi@0:                     }
aoqi@0:                     warnedAttrs.add(name);
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return false;
aoqi@0:         }
aoqi@0: 
aoqi@0:         protected abstract void read(Symbol sym, int attrLen);
aoqi@0: 
aoqi@0:         protected final Name name;
aoqi@0:         protected final ClassFile.Version version;
aoqi@0:         protected final Set<AttributeKind> kinds;
aoqi@0:     }
aoqi@0: 
aoqi@0:     protected Set<AttributeKind> CLASS_ATTRIBUTE =
aoqi@0:             EnumSet.of(AttributeKind.CLASS);
aoqi@0:     protected Set<AttributeKind> MEMBER_ATTRIBUTE =
aoqi@0:             EnumSet.of(AttributeKind.MEMBER);
aoqi@0:     protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
aoqi@0:             EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
aoqi@0: 
aoqi@0:     protected Map<Name, AttributeReader> attributeReaders = new HashMap<Name, AttributeReader>();
aoqi@0: 
aoqi@0:     private void initAttributeReaders() {
aoqi@0:         AttributeReader[] readers = {
aoqi@0:             // v45.3 attributes
aoqi@0: 
aoqi@0:             new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     if (readAllOfClassFile || saveParameterNames)
aoqi@0:                         ((MethodSymbol)sym).code = readCode(sym);
aoqi@0:                     else
aoqi@0:                         bp = bp + attrLen;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     Object v = readPool(nextChar());
aoqi@0:                     // Ignore ConstantValue attribute if field not final.
aoqi@0:                     if ((sym.flags() & FINAL) != 0)
aoqi@0:                         ((VarSymbol) sym).setData(v);
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     sym.flags_field |= DEPRECATED;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     int nexceptions = nextChar();
aoqi@0:                     List<Type> thrown = List.nil();
aoqi@0:                     for (int j = 0; j < nexceptions; j++)
aoqi@0:                         thrown = thrown.prepend(readClassSymbol(nextChar()).type);
aoqi@0:                     if (sym.type.getThrownTypes().isEmpty())
aoqi@0:                         sym.type.asMethodType().thrown = thrown.reverse();
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     ClassSymbol c = (ClassSymbol) sym;
aoqi@0:                     readInnerClasses(c);
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     int newbp = bp + attrLen;
aoqi@0:                     if (saveParameterNames && !sawMethodParameters) {
aoqi@0:                         // Pick up parameter names from the variable table.
aoqi@0:                         // Parameter names are not explicitly identified as such,
aoqi@0:                         // but all parameter name entries in the LocalVariableTable
aoqi@0:                         // have a start_pc of 0.  Therefore, we record the name
aoqi@0:                         // indicies of all slots with a start_pc of zero in the
aoqi@0:                         // parameterNameIndicies array.
aoqi@0:                         // Note that this implicitly honors the JVMS spec that
aoqi@0:                         // there may be more than one LocalVariableTable, and that
aoqi@0:                         // there is no specified ordering for the entries.
aoqi@0:                         int numEntries = nextChar();
aoqi@0:                         for (int i = 0; i < numEntries; i++) {
aoqi@0:                             int start_pc = nextChar();
aoqi@0:                             int length = nextChar();
aoqi@0:                             int nameIndex = nextChar();
aoqi@0:                             int sigIndex = nextChar();
aoqi@0:                             int register = nextChar();
aoqi@0:                             if (start_pc == 0) {
aoqi@0:                                 // ensure array large enough
aoqi@0:                                 if (register >= parameterNameIndices.length) {
aoqi@0:                                     int newSize = Math.max(register, parameterNameIndices.length + 8);
aoqi@0:                                     parameterNameIndices =
aoqi@0:                                             Arrays.copyOf(parameterNameIndices, newSize);
aoqi@0:                                 }
aoqi@0:                                 parameterNameIndices[register] = nameIndex;
aoqi@0:                                 haveParameterNameIndices = true;
aoqi@0:                             }
aoqi@0:                         }
aoqi@0:                     }
aoqi@0:                     bp = newbp;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrlen) {
aoqi@0:                     int newbp = bp + attrlen;
aoqi@0:                     if (saveParameterNames) {
aoqi@0:                         sawMethodParameters = true;
aoqi@0:                         int numEntries = nextByte();
aoqi@0:                         parameterNameIndices = new int[numEntries];
aoqi@0:                         haveParameterNameIndices = true;
aoqi@0:                         for (int i = 0; i < numEntries; i++) {
aoqi@0:                             int nameIndex = nextChar();
aoqi@0:                             int flags = nextChar();
aoqi@0:                             parameterNameIndices[i] = nameIndex;
aoqi@0:                         }
aoqi@0:                     }
aoqi@0:                     bp = newbp;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0: 
aoqi@0:             new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     ClassSymbol c = (ClassSymbol) sym;
aoqi@0:                     Name n = readName(nextChar());
aoqi@0:                     c.sourcefile = new SourceFileObject(n, c.flatname);
aoqi@0:                     // If the class is a toplevel class, originating from a Java source file,
aoqi@0:                     // but the class name does not match the file name, then it is
aoqi@0:                     // an auxiliary class.
aoqi@0:                     String sn = n.toString();
aoqi@0:                     if (c.owner.kind == Kinds.PCK &&
aoqi@0:                         sn.endsWith(".java") &&
aoqi@0:                         !sn.equals(c.name.toString()+".java")) {
aoqi@0:                         c.flags_field |= AUXILIARY;
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     // bridge methods are visible when generics not enabled
aoqi@0:                     if (allowGenerics || (sym.flags_field & BRIDGE) == 0)
aoqi@0:                         sym.flags_field |= SYNTHETIC;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             // standard v49 attributes
aoqi@0: 
aoqi@0:             new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     int newbp = bp + attrLen;
aoqi@0:                     readEnclosingMethodAttr(sym);
aoqi@0:                     bp = newbp;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 @Override
aoqi@0:                 protected boolean accepts(AttributeKind kind) {
aoqi@0:                     return super.accepts(kind) && allowGenerics;
aoqi@0:                 }
aoqi@0: 
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     if (sym.kind == TYP) {
aoqi@0:                         ClassSymbol c = (ClassSymbol) sym;
aoqi@0:                         readingClassAttr = true;
aoqi@0:                         try {
aoqi@0:                             ClassType ct1 = (ClassType)c.type;
aoqi@0:                             Assert.check(c == currentOwner);
aoqi@0:                             ct1.typarams_field = readTypeParams(nextChar());
aoqi@0:                             ct1.supertype_field = sigToType();
aoqi@0:                             ListBuffer<Type> is = new ListBuffer<Type>();
aoqi@0:                             while (sigp != siglimit) is.append(sigToType());
aoqi@0:                             ct1.interfaces_field = is.toList();
aoqi@0:                         } finally {
aoqi@0:                             readingClassAttr = false;
aoqi@0:                         }
aoqi@0:                     } else {
aoqi@0:                         List<Type> thrown = sym.type.getThrownTypes();
aoqi@0:                         sym.type = readType(nextChar());
aoqi@0:                         //- System.err.println(" # " + sym.type);
aoqi@0:                         if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
aoqi@0:                             sym.type.asMethodType().thrown = thrown;
aoqi@0: 
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             // v49 annotation attributes
aoqi@0: 
aoqi@0:             new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     attachAnnotationDefault(sym);
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     attachAnnotations(sym);
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     attachParameterAnnotations(sym);
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     attachAnnotations(sym);
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     attachParameterAnnotations(sym);
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             // additional "legacy" v49 attributes, superceded by flags
aoqi@0: 
aoqi@0:             new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     if (allowAnnotations)
aoqi@0:                         sym.flags_field |= ANNOTATION;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     sym.flags_field |= BRIDGE;
aoqi@0:                     if (!allowGenerics)
aoqi@0:                         sym.flags_field &= ~SYNTHETIC;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     sym.flags_field |= ENUM;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     if (allowVarargs)
aoqi@0:                         sym.flags_field |= VARARGS;
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     attachTypeAnnotations(sym);
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0:             new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
aoqi@0:                 protected void read(Symbol sym, int attrLen) {
aoqi@0:                     attachTypeAnnotations(sym);
aoqi@0:                 }
aoqi@0:             },
aoqi@0: 
aoqi@0: 
aoqi@0:             // The following attributes for a Code attribute are not currently handled
aoqi@0:             // StackMapTable
aoqi@0:             // SourceDebugExtension
aoqi@0:             // LineNumberTable
aoqi@0:             // LocalVariableTypeTable
aoqi@0:         };
aoqi@0: 
aoqi@0:         for (AttributeReader r: readers)
aoqi@0:             attributeReaders.put(r.name, r);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Report unrecognized attribute.
aoqi@0:      */
aoqi@0:     void unrecognized(Name attrName) {
aoqi@0:         if (checkClassFile)
aoqi@0:             printCCF("ccf.unrecognized.attribute", attrName);
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0: 
aoqi@0:     protected void readEnclosingMethodAttr(Symbol sym) {
aoqi@0:         // sym is a nested class with an "Enclosing Method" attribute
aoqi@0:         // remove sym from it's current owners scope and place it in
aoqi@0:         // the scope specified by the attribute
aoqi@0:         sym.owner.members().remove(sym);
aoqi@0:         ClassSymbol self = (ClassSymbol)sym;
aoqi@0:         ClassSymbol c = readClassSymbol(nextChar());
aoqi@0:         NameAndType nt = readNameAndType(nextChar());
aoqi@0: 
aoqi@0:         if (c.members_field == null)
aoqi@0:             throw badClassFile("bad.enclosing.class", self, c);
aoqi@0: 
aoqi@0:         MethodSymbol m = findMethod(nt, c.members_field, self.flags());
aoqi@0:         if (nt != null && m == null)
aoqi@0:             throw badClassFile("bad.enclosing.method", self);
aoqi@0: 
aoqi@0:         self.name = simpleBinaryName(self.flatname, c.flatname) ;
aoqi@0:         self.owner = m != null ? m : c;
aoqi@0:         if (self.name.isEmpty())
aoqi@0:             self.fullname = names.empty;
aoqi@0:         else
aoqi@0:             self.fullname = ClassSymbol.formFullName(self.name, self.owner);
aoqi@0: 
aoqi@0:         if (m != null) {
aoqi@0:             ((ClassType)sym.type).setEnclosingType(m.type);
aoqi@0:         } else if ((self.flags_field & STATIC) == 0) {
aoqi@0:             ((ClassType)sym.type).setEnclosingType(c.type);
aoqi@0:         } else {
aoqi@0:             ((ClassType)sym.type).setEnclosingType(Type.noType);
aoqi@0:         }
aoqi@0:         enterTypevars(self);
aoqi@0:         if (!missingTypeVariables.isEmpty()) {
aoqi@0:             ListBuffer<Type> typeVars =  new ListBuffer<Type>();
aoqi@0:             for (Type typevar : missingTypeVariables) {
aoqi@0:                 typeVars.append(findTypeVar(typevar.tsym.name));
aoqi@0:             }
aoqi@0:             foundTypeVariables = typeVars.toList();
aoqi@0:         } else {
aoqi@0:             foundTypeVariables = List.nil();
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     // See java.lang.Class
aoqi@0:     private Name simpleBinaryName(Name self, Name enclosing) {
aoqi@0:         String simpleBinaryName = self.toString().substring(enclosing.toString().length());
aoqi@0:         if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
aoqi@0:             throw badClassFile("bad.enclosing.method", self);
aoqi@0:         int index = 1;
aoqi@0:         while (index < simpleBinaryName.length() &&
aoqi@0:                isAsciiDigit(simpleBinaryName.charAt(index)))
aoqi@0:             index++;
aoqi@0:         return names.fromString(simpleBinaryName.substring(index));
aoqi@0:     }
aoqi@0: 
aoqi@0:     private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
aoqi@0:         if (nt == null)
aoqi@0:             return null;
aoqi@0: 
aoqi@0:         MethodType type = nt.uniqueType.type.asMethodType();
aoqi@0: 
aoqi@0:         for (Scope.Entry e = scope.lookup(nt.name); e.scope != null; e = e.next())
aoqi@0:             if (e.sym.kind == MTH && isSameBinaryType(e.sym.type.asMethodType(), type))
aoqi@0:                 return (MethodSymbol)e.sym;
aoqi@0: 
aoqi@0:         if (nt.name != names.init)
aoqi@0:             // not a constructor
aoqi@0:             return null;
aoqi@0:         if ((flags & INTERFACE) != 0)
aoqi@0:             // no enclosing instance
aoqi@0:             return null;
aoqi@0:         if (nt.uniqueType.type.getParameterTypes().isEmpty())
aoqi@0:             // no parameters
aoqi@0:             return null;
aoqi@0: 
aoqi@0:         // A constructor of an inner class.
aoqi@0:         // Remove the first argument (the enclosing instance)
aoqi@0:         nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail,
aoqi@0:                                  nt.uniqueType.type.getReturnType(),
aoqi@0:                                  nt.uniqueType.type.getThrownTypes(),
aoqi@0:                                  syms.methodClass));
aoqi@0:         // Try searching again
aoqi@0:         return findMethod(nt, scope, flags);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Similar to Types.isSameType but avoids completion */
aoqi@0:     private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
aoqi@0:         List<Type> types1 = types.erasure(mt1.getParameterTypes())
aoqi@0:             .prepend(types.erasure(mt1.getReturnType()));
aoqi@0:         List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
aoqi@0:         while (!types1.isEmpty() && !types2.isEmpty()) {
aoqi@0:             if (types1.head.tsym != types2.head.tsym)
aoqi@0:                 return false;
aoqi@0:             types1 = types1.tail;
aoqi@0:             types2 = types2.tail;
aoqi@0:         }
aoqi@0:         return types1.isEmpty() && types2.isEmpty();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Character.isDigit answers <tt>true</tt> to some non-ascii
aoqi@0:      * digits.  This one does not.  <b>copied from java.lang.Class</b>
aoqi@0:      */
aoqi@0:     private static boolean isAsciiDigit(char c) {
aoqi@0:         return '0' <= c && c <= '9';
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read member attributes.
aoqi@0:      */
aoqi@0:     void readMemberAttrs(Symbol sym) {
aoqi@0:         readAttrs(sym, AttributeKind.MEMBER);
aoqi@0:     }
aoqi@0: 
aoqi@0:     void readAttrs(Symbol sym, AttributeKind kind) {
aoqi@0:         char ac = nextChar();
aoqi@0:         for (int i = 0; i < ac; i++) {
aoqi@0:             Name attrName = readName(nextChar());
aoqi@0:             int attrLen = nextInt();
aoqi@0:             AttributeReader r = attributeReaders.get(attrName);
aoqi@0:             if (r != null && r.accepts(kind))
aoqi@0:                 r.read(sym, attrLen);
aoqi@0:             else  {
aoqi@0:                 unrecognized(attrName);
aoqi@0:                 bp = bp + attrLen;
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private boolean readingClassAttr = false;
aoqi@0:     private List<Type> missingTypeVariables = List.nil();
aoqi@0:     private List<Type> foundTypeVariables = List.nil();
aoqi@0: 
aoqi@0:     /** Read class attributes.
aoqi@0:      */
aoqi@0:     void readClassAttrs(ClassSymbol c) {
aoqi@0:         readAttrs(c, AttributeKind.CLASS);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read code block.
aoqi@0:      */
aoqi@0:     Code readCode(Symbol owner) {
aoqi@0:         nextChar(); // max_stack
aoqi@0:         nextChar(); // max_locals
aoqi@0:         final int  code_length = nextInt();
aoqi@0:         bp += code_length;
aoqi@0:         final char exception_table_length = nextChar();
aoqi@0:         bp += exception_table_length * 8;
aoqi@0:         readMemberAttrs(owner);
aoqi@0:         return null;
aoqi@0:     }
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Reading Java-language annotations
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0:     /** Attach annotations.
aoqi@0:      */
aoqi@0:     void attachAnnotations(final Symbol sym) {
aoqi@0:         int numAttributes = nextChar();
aoqi@0:         if (numAttributes != 0) {
aoqi@0:             ListBuffer<CompoundAnnotationProxy> proxies =
aoqi@0:                 new ListBuffer<CompoundAnnotationProxy>();
aoqi@0:             for (int i = 0; i<numAttributes; i++) {
aoqi@0:                 CompoundAnnotationProxy proxy = readCompoundAnnotation();
aoqi@0:                 if (proxy.type.tsym == syms.proprietaryType.tsym)
aoqi@0:                     sym.flags_field |= PROPRIETARY;
aoqi@0:                 else if (proxy.type.tsym == syms.profileType.tsym) {
aoqi@0:                     if (profile != Profile.DEFAULT) {
aoqi@0:                         for (Pair<Name,Attribute> v: proxy.values) {
aoqi@0:                             if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
aoqi@0:                                 Attribute.Constant c = (Attribute.Constant) v.snd;
aoqi@0:                                 if (c.type == syms.intType && ((Integer) c.value) > profile.value) {
aoqi@0:                                     sym.flags_field |= NOT_IN_PROFILE;
aoqi@0:                                 }
aoqi@0:                             }
aoqi@0:                         }
aoqi@0:                     }
aoqi@0:                 } else
aoqi@0:                     proxies.append(proxy);
aoqi@0:             }
aoqi@0:             annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Attach parameter annotations.
aoqi@0:      */
aoqi@0:     void attachParameterAnnotations(final Symbol method) {
aoqi@0:         final MethodSymbol meth = (MethodSymbol)method;
aoqi@0:         int numParameters = buf[bp++] & 0xFF;
aoqi@0:         List<VarSymbol> parameters = meth.params();
aoqi@0:         int pnum = 0;
aoqi@0:         while (parameters.tail != null) {
aoqi@0:             attachAnnotations(parameters.head);
aoqi@0:             parameters = parameters.tail;
aoqi@0:             pnum++;
aoqi@0:         }
aoqi@0:         if (pnum != numParameters) {
aoqi@0:             throw badClassFile("bad.runtime.invisible.param.annotations", meth);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     void attachTypeAnnotations(final Symbol sym) {
aoqi@0:         int numAttributes = nextChar();
aoqi@0:         if (numAttributes != 0) {
aoqi@0:             ListBuffer<TypeAnnotationProxy> proxies = new ListBuffer<>();
aoqi@0:             for (int i = 0; i < numAttributes; i++)
aoqi@0:                 proxies.append(readTypeAnnotation());
aoqi@0:             annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Attach the default value for an annotation element.
aoqi@0:      */
aoqi@0:     void attachAnnotationDefault(final Symbol sym) {
aoqi@0:         final MethodSymbol meth = (MethodSymbol)sym; // only on methods
aoqi@0:         final Attribute value = readAttributeValue();
aoqi@0: 
aoqi@0:         // The default value is set later during annotation. It might
aoqi@0:         // be the case that the Symbol sym is annotated _after_ the
aoqi@0:         // repeating instances that depend on this default value,
aoqi@0:         // because of this we set an interim value that tells us this
aoqi@0:         // element (most likely) has a default.
aoqi@0:         //
aoqi@0:         // Set interim value for now, reset just before we do this
aoqi@0:         // properly at annotate time.
aoqi@0:         meth.defaultValue = value;
aoqi@0:         annotate.normal(new AnnotationDefaultCompleter(meth, value));
aoqi@0:     }
aoqi@0: 
aoqi@0:     Type readTypeOrClassSymbol(int i) {
aoqi@0:         // support preliminary jsr175-format class files
aoqi@0:         if (buf[poolIdx[i]] == CONSTANT_Class)
aoqi@0:             return readClassSymbol(i).type;
aoqi@0:         return readType(i);
aoqi@0:     }
aoqi@0:     Type readEnumType(int i) {
aoqi@0:         // support preliminary jsr175-format class files
aoqi@0:         int index = poolIdx[i];
aoqi@0:         int length = getChar(index + 1);
aoqi@0:         if (buf[index + length + 2] != ';')
aoqi@0:             return enterClass(readName(i)).type;
aoqi@0:         return readType(i);
aoqi@0:     }
aoqi@0: 
aoqi@0:     CompoundAnnotationProxy readCompoundAnnotation() {
aoqi@0:         Type t = readTypeOrClassSymbol(nextChar());
aoqi@0:         int numFields = nextChar();
aoqi@0:         ListBuffer<Pair<Name,Attribute>> pairs =
aoqi@0:             new ListBuffer<Pair<Name,Attribute>>();
aoqi@0:         for (int i=0; i<numFields; i++) {
aoqi@0:             Name name = readName(nextChar());
aoqi@0:             Attribute value = readAttributeValue();
aoqi@0:             pairs.append(new Pair<Name,Attribute>(name, value));
aoqi@0:         }
aoqi@0:         return new CompoundAnnotationProxy(t, pairs.toList());
aoqi@0:     }
aoqi@0: 
aoqi@0:     TypeAnnotationProxy readTypeAnnotation() {
aoqi@0:         TypeAnnotationPosition position = readPosition();
aoqi@0:         CompoundAnnotationProxy proxy = readCompoundAnnotation();
aoqi@0: 
aoqi@0:         return new TypeAnnotationProxy(proxy, position);
aoqi@0:     }
aoqi@0: 
aoqi@0:     TypeAnnotationPosition readPosition() {
aoqi@0:         int tag = nextByte(); // TargetType tag is a byte
aoqi@0: 
aoqi@0:         if (!TargetType.isValidTargetTypeValue(tag))
aoqi@0:             throw this.badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
aoqi@0: 
aoqi@0:         TypeAnnotationPosition position = new TypeAnnotationPosition();
aoqi@0:         TargetType type = TargetType.fromTargetTypeValue(tag);
aoqi@0: 
aoqi@0:         position.type = type;
aoqi@0: 
aoqi@0:         switch (type) {
aoqi@0:         // instanceof
aoqi@0:         case INSTANCEOF:
aoqi@0:         // new expression
aoqi@0:         case NEW:
aoqi@0:         // constructor/method reference receiver
aoqi@0:         case CONSTRUCTOR_REFERENCE:
aoqi@0:         case METHOD_REFERENCE:
aoqi@0:             position.offset = nextChar();
aoqi@0:             break;
aoqi@0:         // local variable
aoqi@0:         case LOCAL_VARIABLE:
aoqi@0:         // resource variable
aoqi@0:         case RESOURCE_VARIABLE:
aoqi@0:             int table_length = nextChar();
aoqi@0:             position.lvarOffset = new int[table_length];
aoqi@0:             position.lvarLength = new int[table_length];
aoqi@0:             position.lvarIndex = new int[table_length];
aoqi@0: 
aoqi@0:             for (int i = 0; i < table_length; ++i) {
aoqi@0:                 position.lvarOffset[i] = nextChar();
aoqi@0:                 position.lvarLength[i] = nextChar();
aoqi@0:                 position.lvarIndex[i] = nextChar();
aoqi@0:             }
aoqi@0:             break;
aoqi@0:         // exception parameter
aoqi@0:         case EXCEPTION_PARAMETER:
aoqi@0:             position.exception_index = nextChar();
aoqi@0:             break;
aoqi@0:         // method receiver
aoqi@0:         case METHOD_RECEIVER:
aoqi@0:             // Do nothing
aoqi@0:             break;
aoqi@0:         // type parameter
aoqi@0:         case CLASS_TYPE_PARAMETER:
aoqi@0:         case METHOD_TYPE_PARAMETER:
aoqi@0:             position.parameter_index = nextByte();
aoqi@0:             break;
aoqi@0:         // type parameter bound
aoqi@0:         case CLASS_TYPE_PARAMETER_BOUND:
aoqi@0:         case METHOD_TYPE_PARAMETER_BOUND:
aoqi@0:             position.parameter_index = nextByte();
aoqi@0:             position.bound_index = nextByte();
aoqi@0:             break;
aoqi@0:         // class extends or implements clause
aoqi@0:         case CLASS_EXTENDS:
aoqi@0:             position.type_index = nextChar();
aoqi@0:             break;
aoqi@0:         // throws
aoqi@0:         case THROWS:
aoqi@0:             position.type_index = nextChar();
aoqi@0:             break;
aoqi@0:         // method parameter
aoqi@0:         case METHOD_FORMAL_PARAMETER:
aoqi@0:             position.parameter_index = nextByte();
aoqi@0:             break;
aoqi@0:         // type cast
aoqi@0:         case CAST:
aoqi@0:         // method/constructor/reference type argument
aoqi@0:         case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
aoqi@0:         case METHOD_INVOCATION_TYPE_ARGUMENT:
aoqi@0:         case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
aoqi@0:         case METHOD_REFERENCE_TYPE_ARGUMENT:
aoqi@0:             position.offset = nextChar();
aoqi@0:             position.type_index = nextByte();
aoqi@0:             break;
aoqi@0:         // We don't need to worry about these
aoqi@0:         case METHOD_RETURN:
aoqi@0:         case FIELD:
aoqi@0:             break;
aoqi@0:         case UNKNOWN:
aoqi@0:             throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
aoqi@0:         default:
aoqi@0:             throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + position);
aoqi@0:         }
aoqi@0: 
aoqi@0:         { // See whether there is location info and read it
aoqi@0:             int len = nextByte();
aoqi@0:             ListBuffer<Integer> loc = new ListBuffer<>();
aoqi@0:             for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
aoqi@0:                 loc = loc.append(nextByte());
aoqi@0:             position.location = TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
aoqi@0:         }
aoqi@0: 
aoqi@0:         return position;
aoqi@0:     }
aoqi@0: 
aoqi@0:     Attribute readAttributeValue() {
aoqi@0:         char c = (char) buf[bp++];
aoqi@0:         switch (c) {
aoqi@0:         case 'B':
aoqi@0:             return new Attribute.Constant(syms.byteType, readPool(nextChar()));
aoqi@0:         case 'C':
aoqi@0:             return new Attribute.Constant(syms.charType, readPool(nextChar()));
aoqi@0:         case 'D':
aoqi@0:             return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
aoqi@0:         case 'F':
aoqi@0:             return new Attribute.Constant(syms.floatType, readPool(nextChar()));
aoqi@0:         case 'I':
aoqi@0:             return new Attribute.Constant(syms.intType, readPool(nextChar()));
aoqi@0:         case 'J':
aoqi@0:             return new Attribute.Constant(syms.longType, readPool(nextChar()));
aoqi@0:         case 'S':
aoqi@0:             return new Attribute.Constant(syms.shortType, readPool(nextChar()));
aoqi@0:         case 'Z':
aoqi@0:             return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
aoqi@0:         case 's':
aoqi@0:             return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
aoqi@0:         case 'e':
aoqi@0:             return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
aoqi@0:         case 'c':
aoqi@0:             return new Attribute.Class(types, readTypeOrClassSymbol(nextChar()));
aoqi@0:         case '[': {
aoqi@0:             int n = nextChar();
aoqi@0:             ListBuffer<Attribute> l = new ListBuffer<Attribute>();
aoqi@0:             for (int i=0; i<n; i++)
aoqi@0:                 l.append(readAttributeValue());
aoqi@0:             return new ArrayAttributeProxy(l.toList());
aoqi@0:         }
aoqi@0:         case '@':
aoqi@0:             return readCompoundAnnotation();
aoqi@0:         default:
aoqi@0:             throw new AssertionError("unknown annotation tag '" + c + "'");
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     interface ProxyVisitor extends Attribute.Visitor {
aoqi@0:         void visitEnumAttributeProxy(EnumAttributeProxy proxy);
aoqi@0:         void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
aoqi@0:         void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
aoqi@0:     }
aoqi@0: 
aoqi@0:     static class EnumAttributeProxy extends Attribute {
aoqi@0:         Type enumType;
aoqi@0:         Name enumerator;
aoqi@0:         public EnumAttributeProxy(Type enumType, Name enumerator) {
aoqi@0:             super(null);
aoqi@0:             this.enumType = enumType;
aoqi@0:             this.enumerator = enumerator;
aoqi@0:         }
aoqi@0:         public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
aoqi@0:         @Override
aoqi@0:         public String toString() {
aoqi@0:             return "/*proxy enum*/" + enumType + "." + enumerator;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     static class ArrayAttributeProxy extends Attribute {
aoqi@0:         List<Attribute> values;
aoqi@0:         ArrayAttributeProxy(List<Attribute> values) {
aoqi@0:             super(null);
aoqi@0:             this.values = values;
aoqi@0:         }
aoqi@0:         public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
aoqi@0:         @Override
aoqi@0:         public String toString() {
aoqi@0:             return "{" + values + "}";
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** A temporary proxy representing a compound attribute.
aoqi@0:      */
aoqi@0:     static class CompoundAnnotationProxy extends Attribute {
aoqi@0:         final List<Pair<Name,Attribute>> values;
aoqi@0:         public CompoundAnnotationProxy(Type type,
aoqi@0:                                       List<Pair<Name,Attribute>> values) {
aoqi@0:             super(type);
aoqi@0:             this.values = values;
aoqi@0:         }
aoqi@0:         public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
aoqi@0:         @Override
aoqi@0:         public String toString() {
aoqi@0:             StringBuilder buf = new StringBuilder();
aoqi@0:             buf.append("@");
aoqi@0:             buf.append(type.tsym.getQualifiedName());
aoqi@0:             buf.append("/*proxy*/{");
aoqi@0:             boolean first = true;
aoqi@0:             for (List<Pair<Name,Attribute>> v = values;
aoqi@0:                  v.nonEmpty(); v = v.tail) {
aoqi@0:                 Pair<Name,Attribute> value = v.head;
aoqi@0:                 if (!first) buf.append(",");
aoqi@0:                 first = false;
aoqi@0:                 buf.append(value.fst);
aoqi@0:                 buf.append("=");
aoqi@0:                 buf.append(value.snd);
aoqi@0:             }
aoqi@0:             buf.append("}");
aoqi@0:             return buf.toString();
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** A temporary proxy representing a type annotation.
aoqi@0:      */
aoqi@0:     static class TypeAnnotationProxy {
aoqi@0:         final CompoundAnnotationProxy compound;
aoqi@0:         final TypeAnnotationPosition position;
aoqi@0:         public TypeAnnotationProxy(CompoundAnnotationProxy compound,
aoqi@0:                 TypeAnnotationPosition position) {
aoqi@0:             this.compound = compound;
aoqi@0:             this.position = position;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     class AnnotationDeproxy implements ProxyVisitor {
aoqi@0:         private ClassSymbol requestingOwner = currentOwner.kind == MTH
aoqi@0:             ? currentOwner.enclClass() : (ClassSymbol)currentOwner;
aoqi@0: 
aoqi@0:         List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
aoqi@0:             // also must fill in types!!!!
aoqi@0:             ListBuffer<Attribute.Compound> buf =
aoqi@0:                 new ListBuffer<Attribute.Compound>();
aoqi@0:             for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
aoqi@0:                 buf.append(deproxyCompound(l.head));
aoqi@0:             }
aoqi@0:             return buf.toList();
aoqi@0:         }
aoqi@0: 
aoqi@0:         Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
aoqi@0:             ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf =
aoqi@0:                 new ListBuffer<Pair<Symbol.MethodSymbol,Attribute>>();
aoqi@0:             for (List<Pair<Name,Attribute>> l = a.values;
aoqi@0:                  l.nonEmpty();
aoqi@0:                  l = l.tail) {
aoqi@0:                 MethodSymbol meth = findAccessMethod(a.type, l.head.fst);
aoqi@0:                 buf.append(new Pair<Symbol.MethodSymbol,Attribute>
aoqi@0:                            (meth, deproxy(meth.type.getReturnType(), l.head.snd)));
aoqi@0:             }
aoqi@0:             return new Attribute.Compound(a.type, buf.toList());
aoqi@0:         }
aoqi@0: 
aoqi@0:         MethodSymbol findAccessMethod(Type container, Name name) {
aoqi@0:             CompletionFailure failure = null;
aoqi@0:             try {
aoqi@0:                 for (Scope.Entry e = container.tsym.members().lookup(name);
aoqi@0:                      e.scope != null;
aoqi@0:                      e = e.next()) {
aoqi@0:                     Symbol sym = e.sym;
aoqi@0:                     if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
aoqi@0:                         return (MethodSymbol) sym;
aoqi@0:                 }
aoqi@0:             } catch (CompletionFailure ex) {
aoqi@0:                 failure = ex;
aoqi@0:             }
aoqi@0:             // The method wasn't found: emit a warning and recover
aoqi@0:             JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
aoqi@0:             try {
darcy@2707:                 if (lintClassfile) {
darcy@2707:                     if (failure == null) {
darcy@2707:                         log.warning("annotation.method.not.found",
darcy@2707:                                     container,
darcy@2707:                                     name);
darcy@2707:                     } else {
darcy@2707:                         log.warning("annotation.method.not.found.reason",
darcy@2707:                                     container,
darcy@2707:                                     name,
darcy@2707:                                     failure.getDetailValue()); //diagnostic, if present
darcy@2707:                     }
aoqi@0:                 }
aoqi@0:             } finally {
aoqi@0:                 log.useSource(prevSource);
aoqi@0:             }
aoqi@0:             // Construct a new method type and symbol.  Use bottom
aoqi@0:             // type (typeof null) as return type because this type is
aoqi@0:             // a subtype of all reference types and can be converted
aoqi@0:             // to primitive types by unboxing.
aoqi@0:             MethodType mt = new MethodType(List.<Type>nil(),
aoqi@0:                                            syms.botType,
aoqi@0:                                            List.<Type>nil(),
aoqi@0:                                            syms.methodClass);
aoqi@0:             return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
aoqi@0:         }
aoqi@0: 
aoqi@0:         Attribute result;
aoqi@0:         Type type;
aoqi@0:         Attribute deproxy(Type t, Attribute a) {
aoqi@0:             Type oldType = type;
aoqi@0:             try {
aoqi@0:                 type = t;
aoqi@0:                 a.accept(this);
aoqi@0:                 return result;
aoqi@0:             } finally {
aoqi@0:                 type = oldType;
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         // implement Attribute.Visitor below
aoqi@0: 
aoqi@0:         public void visitConstant(Attribute.Constant value) {
aoqi@0:             // assert value.type == type;
aoqi@0:             result = value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void visitClass(Attribute.Class clazz) {
aoqi@0:             result = clazz;
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void visitEnum(Attribute.Enum e) {
aoqi@0:             throw new AssertionError(); // shouldn't happen
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void visitCompound(Attribute.Compound compound) {
aoqi@0:             throw new AssertionError(); // shouldn't happen
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void visitArray(Attribute.Array array) {
aoqi@0:             throw new AssertionError(); // shouldn't happen
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void visitError(Attribute.Error e) {
aoqi@0:             throw new AssertionError(); // shouldn't happen
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
aoqi@0:             // type.tsym.flatName() should == proxy.enumFlatName
aoqi@0:             TypeSymbol enumTypeSym = proxy.enumType.tsym;
aoqi@0:             VarSymbol enumerator = null;
aoqi@0:             CompletionFailure failure = null;
aoqi@0:             try {
aoqi@0:                 for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator);
aoqi@0:                      e.scope != null;
aoqi@0:                      e = e.next()) {
aoqi@0:                     if (e.sym.kind == VAR) {
aoqi@0:                         enumerator = (VarSymbol)e.sym;
aoqi@0:                         break;
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             catch (CompletionFailure ex) {
aoqi@0:                 failure = ex;
aoqi@0:             }
aoqi@0:             if (enumerator == null) {
aoqi@0:                 if (failure != null) {
aoqi@0:                     log.warning("unknown.enum.constant.reason",
aoqi@0:                               currentClassFile, enumTypeSym, proxy.enumerator,
aoqi@0:                               failure.getDiagnostic());
aoqi@0:                 } else {
aoqi@0:                     log.warning("unknown.enum.constant",
aoqi@0:                               currentClassFile, enumTypeSym, proxy.enumerator);
aoqi@0:                 }
aoqi@0:                 result = new Attribute.Enum(enumTypeSym.type,
aoqi@0:                         new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
aoqi@0:             } else {
aoqi@0:                 result = new Attribute.Enum(enumTypeSym.type, enumerator);
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
aoqi@0:             int length = proxy.values.length();
aoqi@0:             Attribute[] ats = new Attribute[length];
aoqi@0:             Type elemtype = types.elemtype(type);
aoqi@0:             int i = 0;
aoqi@0:             for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
aoqi@0:                 ats[i++] = deproxy(elemtype, p.head);
aoqi@0:             }
aoqi@0:             result = new Attribute.Array(type, ats);
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
aoqi@0:             result = deproxyCompound(proxy);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Worker {
aoqi@0:         final MethodSymbol sym;
aoqi@0:         final Attribute value;
aoqi@0:         final JavaFileObject classFile = currentClassFile;
aoqi@0:         @Override
aoqi@0:         public String toString() {
aoqi@0:             return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
aoqi@0:         }
aoqi@0:         AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
aoqi@0:             this.sym = sym;
aoqi@0:             this.value = value;
aoqi@0:         }
aoqi@0:         // implement Annotate.Worker.run()
aoqi@0:         public void run() {
aoqi@0:             JavaFileObject previousClassFile = currentClassFile;
aoqi@0:             try {
aoqi@0:                 // Reset the interim value set earlier in
aoqi@0:                 // attachAnnotationDefault().
aoqi@0:                 sym.defaultValue = null;
aoqi@0:                 currentClassFile = classFile;
aoqi@0:                 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
aoqi@0:             } finally {
aoqi@0:                 currentClassFile = previousClassFile;
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Worker {
aoqi@0:         final Symbol sym;
aoqi@0:         final List<CompoundAnnotationProxy> l;
aoqi@0:         final JavaFileObject classFile;
aoqi@0:         @Override
aoqi@0:         public String toString() {
aoqi@0:             return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
aoqi@0:         }
aoqi@0:         AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
aoqi@0:             this.sym = sym;
aoqi@0:             this.l = l;
aoqi@0:             this.classFile = currentClassFile;
aoqi@0:         }
aoqi@0:         // implement Annotate.Worker.run()
aoqi@0:         public void run() {
aoqi@0:             JavaFileObject previousClassFile = currentClassFile;
aoqi@0:             try {
aoqi@0:                 currentClassFile = classFile;
aoqi@0:                 List<Attribute.Compound> newList = deproxyCompoundList(l);
aoqi@0:                 if (sym.annotationsPendingCompletion()) {
aoqi@0:                     sym.setDeclarationAttributes(newList);
aoqi@0:                 } else {
aoqi@0:                     sym.appendAttributes(newList);
aoqi@0:                 }
aoqi@0:             } finally {
aoqi@0:                 currentClassFile = previousClassFile;
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     class TypeAnnotationCompleter extends AnnotationCompleter {
aoqi@0: 
aoqi@0:         List<TypeAnnotationProxy> proxies;
aoqi@0: 
aoqi@0:         TypeAnnotationCompleter(Symbol sym,
aoqi@0:                 List<TypeAnnotationProxy> proxies) {
aoqi@0:             super(sym, List.<CompoundAnnotationProxy>nil());
aoqi@0:             this.proxies = proxies;
aoqi@0:         }
aoqi@0: 
aoqi@0:         List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
aoqi@0:             ListBuffer<Attribute.TypeCompound> buf = new ListBuffer<>();
aoqi@0:             for (TypeAnnotationProxy proxy: proxies) {
aoqi@0:                 Attribute.Compound compound = deproxyCompound(proxy.compound);
aoqi@0:                 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
aoqi@0:                 buf.add(typeCompound);
aoqi@0:             }
aoqi@0:             return buf.toList();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public void run() {
aoqi@0:             JavaFileObject previousClassFile = currentClassFile;
aoqi@0:             try {
aoqi@0:                 currentClassFile = classFile;
aoqi@0:                 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
aoqi@0:                 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
aoqi@0:             } finally {
aoqi@0:                 currentClassFile = previousClassFile;
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Reading Symbols
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0:     /** Read a field.
aoqi@0:      */
aoqi@0:     VarSymbol readField() {
aoqi@0:         long flags = adjustFieldFlags(nextChar());
aoqi@0:         Name name = readName(nextChar());
aoqi@0:         Type type = readType(nextChar());
aoqi@0:         VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
aoqi@0:         readMemberAttrs(v);
aoqi@0:         return v;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read a method.
aoqi@0:      */
aoqi@0:     MethodSymbol readMethod() {
aoqi@0:         long flags = adjustMethodFlags(nextChar());
aoqi@0:         Name name = readName(nextChar());
aoqi@0:         Type type = readType(nextChar());
aoqi@0:         if (currentOwner.isInterface() &&
aoqi@0:                 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
aoqi@0:             if (majorVersion > Target.JDK1_8.majorVersion ||
aoqi@0:                     (majorVersion == Target.JDK1_8.majorVersion && minorVersion >= Target.JDK1_8.minorVersion)) {
aoqi@0:                 if ((flags & STATIC) == 0) {
aoqi@0:                     currentOwner.flags_field |= DEFAULT;
aoqi@0:                     flags |= DEFAULT | ABSTRACT;
aoqi@0:                 }
aoqi@0:             } else {
aoqi@0:                 //protect against ill-formed classfiles
aoqi@0:                 throw badClassFile((flags & STATIC) == 0 ? "invalid.default.interface" : "invalid.static.interface",
aoqi@0:                                    Integer.toString(majorVersion),
aoqi@0:                                    Integer.toString(minorVersion));
aoqi@0:             }
aoqi@0:         }
aoqi@0:         if (name == names.init && currentOwner.hasOuterInstance()) {
aoqi@0:             // Sometimes anonymous classes don't have an outer
aoqi@0:             // instance, however, there is no reliable way to tell so
aoqi@0:             // we never strip this$n
aoqi@0:             if (!currentOwner.name.isEmpty())
aoqi@0:                 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
aoqi@0:                                       type.getReturnType(),
aoqi@0:                                       type.getThrownTypes(),
aoqi@0:                                       syms.methodClass);
aoqi@0:         }
aoqi@0:         MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
aoqi@0:         if (types.isSignaturePolymorphic(m)) {
aoqi@0:             m.flags_field |= SIGNATURE_POLYMORPHIC;
aoqi@0:         }
aoqi@0:         if (saveParameterNames)
aoqi@0:             initParameterNames(m);
aoqi@0:         Symbol prevOwner = currentOwner;
aoqi@0:         currentOwner = m;
aoqi@0:         try {
aoqi@0:             readMemberAttrs(m);
aoqi@0:         } finally {
aoqi@0:             currentOwner = prevOwner;
aoqi@0:         }
aoqi@0:         if (saveParameterNames)
aoqi@0:             setParameterNames(m, type);
aoqi@0:         return m;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private List<Type> adjustMethodParams(long flags, List<Type> args) {
aoqi@0:         boolean isVarargs = (flags & VARARGS) != 0;
aoqi@0:         if (isVarargs) {
aoqi@0:             Type varargsElem = args.last();
aoqi@0:             ListBuffer<Type> adjustedArgs = new ListBuffer<>();
aoqi@0:             for (Type t : args) {
aoqi@0:                 adjustedArgs.append(t != varargsElem ?
aoqi@0:                     t :
aoqi@0:                     ((ArrayType)t).makeVarargs());
aoqi@0:             }
aoqi@0:             args = adjustedArgs.toList();
aoqi@0:         }
aoqi@0:         return args.tail;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Init the parameter names array.
aoqi@0:      * Parameter names are currently inferred from the names in the
aoqi@0:      * LocalVariableTable attributes of a Code attribute.
aoqi@0:      * (Note: this means parameter names are currently not available for
aoqi@0:      * methods without a Code attribute.)
aoqi@0:      * This method initializes an array in which to store the name indexes
aoqi@0:      * of parameter names found in LocalVariableTable attributes. It is
aoqi@0:      * slightly supersized to allow for additional slots with a start_pc of 0.
aoqi@0:      */
aoqi@0:     void initParameterNames(MethodSymbol sym) {
aoqi@0:         // make allowance for synthetic parameters.
aoqi@0:         final int excessSlots = 4;
aoqi@0:         int expectedParameterSlots =
aoqi@0:                 Code.width(sym.type.getParameterTypes()) + excessSlots;
aoqi@0:         if (parameterNameIndices == null
aoqi@0:                 || parameterNameIndices.length < expectedParameterSlots) {
aoqi@0:             parameterNameIndices = new int[expectedParameterSlots];
aoqi@0:         } else
aoqi@0:             Arrays.fill(parameterNameIndices, 0);
aoqi@0:         haveParameterNameIndices = false;
aoqi@0:         sawMethodParameters = false;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Set the parameter names for a symbol from the name index in the
aoqi@0:      * parameterNameIndicies array. The type of the symbol may have changed
aoqi@0:      * while reading the method attributes (see the Signature attribute).
aoqi@0:      * This may be because of generic information or because anonymous
aoqi@0:      * synthetic parameters were added.   The original type (as read from
aoqi@0:      * the method descriptor) is used to help guess the existence of
aoqi@0:      * anonymous synthetic parameters.
aoqi@0:      * On completion, sym.savedParameter names will either be null (if
aoqi@0:      * no parameter names were found in the class file) or will be set to a
aoqi@0:      * list of names, one per entry in sym.type.getParameterTypes, with
aoqi@0:      * any missing names represented by the empty name.
aoqi@0:      */
aoqi@0:     void setParameterNames(MethodSymbol sym, Type jvmType) {
aoqi@0:         // if no names were found in the class file, there's nothing more to do
aoqi@0:         if (!haveParameterNameIndices)
aoqi@0:             return;
aoqi@0:         // If we get parameter names from MethodParameters, then we
aoqi@0:         // don't need to skip.
aoqi@0:         int firstParam = 0;
aoqi@0:         if (!sawMethodParameters) {
aoqi@0:             firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
aoqi@0:             // the code in readMethod may have skipped the first
aoqi@0:             // parameter when setting up the MethodType. If so, we
aoqi@0:             // make a corresponding allowance here for the position of
aoqi@0:             // the first parameter.  Note that this assumes the
aoqi@0:             // skipped parameter has a width of 1 -- i.e. it is not
aoqi@0:         // a double width type (long or double.)
aoqi@0:         if (sym.name == names.init && currentOwner.hasOuterInstance()) {
aoqi@0:             // Sometimes anonymous classes don't have an outer
aoqi@0:             // instance, however, there is no reliable way to tell so
aoqi@0:             // we never strip this$n
aoqi@0:             if (!currentOwner.name.isEmpty())
aoqi@0:                 firstParam += 1;
aoqi@0:         }
aoqi@0: 
aoqi@0:         if (sym.type != jvmType) {
aoqi@0:                 // reading the method attributes has caused the
aoqi@0:                 // symbol's type to be changed. (i.e. the Signature
aoqi@0:                 // attribute.)  This may happen if there are hidden
aoqi@0:                 // (synthetic) parameters in the descriptor, but not
aoqi@0:                 // in the Signature.  The position of these hidden
aoqi@0:                 // parameters is unspecified; for now, assume they are
aoqi@0:                 // at the beginning, and so skip over them. The
aoqi@0:                 // primary case for this is two hidden parameters
aoqi@0:                 // passed into Enum constructors.
aoqi@0:             int skip = Code.width(jvmType.getParameterTypes())
aoqi@0:                     - Code.width(sym.type.getParameterTypes());
aoqi@0:             firstParam += skip;
aoqi@0:         }
aoqi@0:         }
aoqi@0:         List<Name> paramNames = List.nil();
aoqi@0:         int index = firstParam;
aoqi@0:         for (Type t: sym.type.getParameterTypes()) {
aoqi@0:             int nameIdx = (index < parameterNameIndices.length
aoqi@0:                     ? parameterNameIndices[index] : 0);
aoqi@0:             Name name = nameIdx == 0 ? names.empty : readName(nameIdx);
aoqi@0:             paramNames = paramNames.prepend(name);
aoqi@0:             index += Code.width(t);
aoqi@0:         }
aoqi@0:         sym.savedParameterNames = paramNames.reverse();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * skip n bytes
aoqi@0:      */
aoqi@0:     void skipBytes(int n) {
aoqi@0:         bp = bp + n;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Skip a field or method
aoqi@0:      */
aoqi@0:     void skipMember() {
aoqi@0:         bp = bp + 6;
aoqi@0:         char ac = nextChar();
aoqi@0:         for (int i = 0; i < ac; i++) {
aoqi@0:             bp = bp + 2;
aoqi@0:             int attrLen = nextInt();
aoqi@0:             bp = bp + attrLen;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Enter type variables of this classtype and all enclosing ones in
aoqi@0:      *  `typevars'.
aoqi@0:      */
aoqi@0:     protected void enterTypevars(Type t) {
aoqi@0:         if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS))
aoqi@0:             enterTypevars(t.getEnclosingType());
aoqi@0:         for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail)
aoqi@0:             typevars.enter(xs.head.tsym);
aoqi@0:     }
aoqi@0: 
aoqi@0:     protected void enterTypevars(Symbol sym) {
aoqi@0:         if (sym.owner.kind == MTH) {
aoqi@0:             enterTypevars(sym.owner);
aoqi@0:             enterTypevars(sym.owner.owner);
aoqi@0:         }
aoqi@0:         enterTypevars(sym.type);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read contents of a given class symbol `c'. Both external and internal
aoqi@0:      *  versions of an inner class are read.
aoqi@0:      */
aoqi@0:     void readClass(ClassSymbol c) {
aoqi@0:         ClassType ct = (ClassType)c.type;
aoqi@0: 
aoqi@0:         // allocate scope for members
aoqi@0:         c.members_field = new Scope(c);
aoqi@0: 
aoqi@0:         // prepare type variable table
aoqi@0:         typevars = typevars.dup(currentOwner);
aoqi@0:         if (ct.getEnclosingType().hasTag(CLASS))
aoqi@0:             enterTypevars(ct.getEnclosingType());
aoqi@0: 
aoqi@0:         // read flags, or skip if this is an inner class
aoqi@0:         long flags = adjustClassFlags(nextChar());
aoqi@0:         if (c.owner.kind == PCK) c.flags_field = flags;
aoqi@0: 
aoqi@0:         // read own class name and check that it matches
aoqi@0:         ClassSymbol self = readClassSymbol(nextChar());
aoqi@0:         if (c != self)
aoqi@0:             throw badClassFile("class.file.wrong.class",
aoqi@0:                                self.flatname);
aoqi@0: 
aoqi@0:         // class attributes must be read before class
aoqi@0:         // skip ahead to read class attributes
aoqi@0:         int startbp = bp;
aoqi@0:         nextChar();
aoqi@0:         char interfaceCount = nextChar();
aoqi@0:         bp += interfaceCount * 2;
aoqi@0:         char fieldCount = nextChar();
aoqi@0:         for (int i = 0; i < fieldCount; i++) skipMember();
aoqi@0:         char methodCount = nextChar();
aoqi@0:         for (int i = 0; i < methodCount; i++) skipMember();
aoqi@0:         readClassAttrs(c);
aoqi@0: 
aoqi@0:         if (readAllOfClassFile) {
aoqi@0:             for (int i = 1; i < poolObj.length; i++) readPool(i);
aoqi@0:             c.pool = new Pool(poolObj.length, poolObj, types);
aoqi@0:         }
aoqi@0: 
aoqi@0:         // reset and read rest of classinfo
aoqi@0:         bp = startbp;
aoqi@0:         int n = nextChar();
aoqi@0:         if (ct.supertype_field == null)
aoqi@0:             ct.supertype_field = (n == 0)
aoqi@0:                 ? Type.noType
aoqi@0:                 : readClassSymbol(n).erasure(types);
aoqi@0:         n = nextChar();
aoqi@0:         List<Type> is = List.nil();
aoqi@0:         for (int i = 0; i < n; i++) {
aoqi@0:             Type _inter = readClassSymbol(nextChar()).erasure(types);
aoqi@0:             is = is.prepend(_inter);
aoqi@0:         }
aoqi@0:         if (ct.interfaces_field == null)
aoqi@0:             ct.interfaces_field = is.reverse();
aoqi@0: 
aoqi@0:         Assert.check(fieldCount == nextChar());
aoqi@0:         for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
aoqi@0:         Assert.check(methodCount == nextChar());
aoqi@0:         for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
aoqi@0: 
aoqi@0:         typevars = typevars.leave();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read inner class info. For each inner/outer pair allocate a
aoqi@0:      *  member class.
aoqi@0:      */
aoqi@0:     void readInnerClasses(ClassSymbol c) {
aoqi@0:         int n = nextChar();
aoqi@0:         for (int i = 0; i < n; i++) {
aoqi@0:             nextChar(); // skip inner class symbol
aoqi@0:             ClassSymbol outer = readClassSymbol(nextChar());
aoqi@0:             Name name = readName(nextChar());
aoqi@0:             if (name == null) name = names.empty;
aoqi@0:             long flags = adjustClassFlags(nextChar());
aoqi@0:             if (outer != null) { // we have a member class
aoqi@0:                 if (name == names.empty)
aoqi@0:                     name = names.one;
aoqi@0:                 ClassSymbol member = enterClass(name, outer);
aoqi@0:                 if ((flags & STATIC) == 0) {
aoqi@0:                     ((ClassType)member.type).setEnclosingType(outer.type);
aoqi@0:                     if (member.erasure_field != null)
aoqi@0:                         ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
aoqi@0:                 }
aoqi@0:                 if (c == outer) {
aoqi@0:                     member.flags_field = flags;
aoqi@0:                     enterMember(c, member);
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Read a class file.
aoqi@0:      */
aoqi@0:     private void readClassFile(ClassSymbol c) throws IOException {
aoqi@0:         int magic = nextInt();
aoqi@0:         if (magic != JAVA_MAGIC)
aoqi@0:             throw badClassFile("illegal.start.of.class.file");
aoqi@0: 
aoqi@0:         minorVersion = nextChar();
aoqi@0:         majorVersion = nextChar();
aoqi@0:         int maxMajor = Target.MAX().majorVersion;
aoqi@0:         int maxMinor = Target.MAX().minorVersion;
aoqi@0:         if (majorVersion > maxMajor ||
aoqi@0:             majorVersion * 1000 + minorVersion <
aoqi@0:             Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion)
aoqi@0:         {
aoqi@0:             if (majorVersion == (maxMajor + 1))
aoqi@0:                 log.warning("big.major.version",
aoqi@0:                             currentClassFile,
aoqi@0:                             majorVersion,
aoqi@0:                             maxMajor);
aoqi@0:             else
aoqi@0:                 throw badClassFile("wrong.version",
aoqi@0:                                    Integer.toString(majorVersion),
aoqi@0:                                    Integer.toString(minorVersion),
aoqi@0:                                    Integer.toString(maxMajor),
aoqi@0:                                    Integer.toString(maxMinor));
aoqi@0:         }
aoqi@0:         else if (checkClassFile &&
aoqi@0:                  majorVersion == maxMajor &&
aoqi@0:                  minorVersion > maxMinor)
aoqi@0:         {
aoqi@0:             printCCF("found.later.version",
aoqi@0:                      Integer.toString(minorVersion));
aoqi@0:         }
aoqi@0:         indexPool();
aoqi@0:         if (signatureBuffer.length < bp) {
aoqi@0:             int ns = Integer.highestOneBit(bp) << 1;
aoqi@0:             signatureBuffer = new byte[ns];
aoqi@0:         }
aoqi@0:         readClass(c);
aoqi@0:     }
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Adjusting flags
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0:     long adjustFieldFlags(long flags) {
aoqi@0:         return flags;
aoqi@0:     }
aoqi@0:     long adjustMethodFlags(long flags) {
aoqi@0:         if ((flags & ACC_BRIDGE) != 0) {
aoqi@0:             flags &= ~ACC_BRIDGE;
aoqi@0:             flags |= BRIDGE;
aoqi@0:             if (!allowGenerics)
aoqi@0:                 flags &= ~SYNTHETIC;
aoqi@0:         }
aoqi@0:         if ((flags & ACC_VARARGS) != 0) {
aoqi@0:             flags &= ~ACC_VARARGS;
aoqi@0:             flags |= VARARGS;
aoqi@0:         }
aoqi@0:         return flags;
aoqi@0:     }
aoqi@0:     long adjustClassFlags(long flags) {
aoqi@0:         return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
aoqi@0:     }
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Loading Classes
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0:     /** Define a new class given its name and owner.
aoqi@0:      */
aoqi@0:     public ClassSymbol defineClass(Name name, Symbol owner) {
aoqi@0:         ClassSymbol c = new ClassSymbol(0, name, owner);
aoqi@0:         if (owner.kind == PCK)
aoqi@0:             Assert.checkNull(classes.get(c.flatname), c);
aoqi@0:         c.completer = thisCompleter;
aoqi@0:         return c;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Create a new toplevel or member class symbol with given name
aoqi@0:      *  and owner and enter in `classes' unless already there.
aoqi@0:      */
aoqi@0:     public ClassSymbol enterClass(Name name, TypeSymbol owner) {
aoqi@0:         Name flatname = TypeSymbol.formFlatName(name, owner);
aoqi@0:         ClassSymbol c = classes.get(flatname);
aoqi@0:         if (c == null) {
aoqi@0:             c = defineClass(name, owner);
aoqi@0:             classes.put(flatname, c);
aoqi@0:         } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
aoqi@0:             // reassign fields of classes that might have been loaded with
aoqi@0:             // their flat names.
aoqi@0:             c.owner.members().remove(c);
aoqi@0:             c.name = name;
aoqi@0:             c.owner = owner;
aoqi@0:             c.fullname = ClassSymbol.formFullName(name, owner);
aoqi@0:         }
aoqi@0:         return c;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Creates a new toplevel class symbol with given flat name and
aoqi@0:      * given class (or source) file.
aoqi@0:      *
aoqi@0:      * @param flatName a fully qualified binary class name
aoqi@0:      * @param classFile the class file or compilation unit defining
aoqi@0:      * the class (may be {@code null})
aoqi@0:      * @return a newly created class symbol
aoqi@0:      * @throws AssertionError if the class symbol already exists
aoqi@0:      */
aoqi@0:     public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) {
aoqi@0:         ClassSymbol cs = classes.get(flatName);
aoqi@0:         if (cs != null) {
aoqi@0:             String msg = Log.format("%s: completer = %s; class file = %s; source file = %s",
aoqi@0:                                     cs.fullname,
aoqi@0:                                     cs.completer,
aoqi@0:                                     cs.classfile,
aoqi@0:                                     cs.sourcefile);
aoqi@0:             throw new AssertionError(msg);
aoqi@0:         }
aoqi@0:         Name packageName = Convert.packagePart(flatName);
aoqi@0:         PackageSymbol owner = packageName.isEmpty()
aoqi@0:                                 ? syms.unnamedPackage
aoqi@0:                                 : enterPackage(packageName);
aoqi@0:         cs = defineClass(Convert.shortName(flatName), owner);
aoqi@0:         cs.classfile = classFile;
aoqi@0:         classes.put(flatName, cs);
aoqi@0:         return cs;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Create a new member or toplevel class symbol with given flat name
aoqi@0:      *  and enter in `classes' unless already there.
aoqi@0:      */
aoqi@0:     public ClassSymbol enterClass(Name flatname) {
aoqi@0:         ClassSymbol c = classes.get(flatname);
aoqi@0:         if (c == null)
aoqi@0:             return enterClass(flatname, (JavaFileObject)null);
aoqi@0:         else
aoqi@0:             return c;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Completion for classes to be loaded. Before a class is loaded
aoqi@0:      *  we make sure its enclosing class (if any) is loaded.
aoqi@0:      */
aoqi@0:     private void complete(Symbol sym) throws CompletionFailure {
aoqi@0:         if (sym.kind == TYP) {
aoqi@0:             ClassSymbol c = (ClassSymbol)sym;
aoqi@0:             c.members_field = new Scope.ErrorScope(c); // make sure it's always defined
aoqi@0:             annotate.enterStart();
aoqi@0:             try {
aoqi@0:                 completeOwners(c.owner);
aoqi@0:                 completeEnclosing(c);
aoqi@0:             } finally {
aoqi@0:                 // The flush needs to happen only after annotations
aoqi@0:                 // are filled in.
aoqi@0:                 annotate.enterDoneWithoutFlush();
aoqi@0:             }
aoqi@0:             fillIn(c);
aoqi@0:         } else if (sym.kind == PCK) {
aoqi@0:             PackageSymbol p = (PackageSymbol)sym;
aoqi@0:             try {
aoqi@0:                 fillIn(p);
aoqi@0:             } catch (IOException ex) {
aoqi@0:                 throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex);
aoqi@0:             }
aoqi@0:         }
aoqi@0:         if (!filling)
aoqi@0:             annotate.flush(); // finish attaching annotations
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** complete up through the enclosing package. */
aoqi@0:     private void completeOwners(Symbol o) {
aoqi@0:         if (o.kind != PCK) completeOwners(o.owner);
aoqi@0:         o.complete();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Tries to complete lexically enclosing classes if c looks like a
aoqi@0:      * nested class.  This is similar to completeOwners but handles
aoqi@0:      * the situation when a nested class is accessed directly as it is
aoqi@0:      * possible with the Tree API or javax.lang.model.*.
aoqi@0:      */
aoqi@0:     private void completeEnclosing(ClassSymbol c) {
aoqi@0:         if (c.owner.kind == PCK) {
aoqi@0:             Symbol owner = c.owner;
aoqi@0:             for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) {
aoqi@0:                 Symbol encl = owner.members().lookup(name).sym;
aoqi@0:                 if (encl == null)
aoqi@0:                     encl = classes.get(TypeSymbol.formFlatName(name, owner));
aoqi@0:                 if (encl != null)
aoqi@0:                     encl.complete();
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** We can only read a single class file at a time; this
aoqi@0:      *  flag keeps track of when we are currently reading a class
aoqi@0:      *  file.
aoqi@0:      */
aoqi@0:     private boolean filling = false;
aoqi@0: 
aoqi@0:     /** Fill in definition of class `c' from corresponding class or
aoqi@0:      *  source file.
aoqi@0:      */
aoqi@0:     private void fillIn(ClassSymbol c) {
aoqi@0:         if (completionFailureName == c.fullname) {
aoqi@0:             throw new CompletionFailure(c, "user-selected completion failure by class name");
aoqi@0:         }
aoqi@0:         currentOwner = c;
aoqi@0:         warnedAttrs.clear();
aoqi@0:         JavaFileObject classfile = c.classfile;
aoqi@0:         if (classfile != null) {
aoqi@0:             JavaFileObject previousClassFile = currentClassFile;
aoqi@0:             try {
aoqi@0:                 if (filling) {
aoqi@0:                     Assert.error("Filling " + classfile.toUri() + " during " + previousClassFile);
aoqi@0:                 }
aoqi@0:                 currentClassFile = classfile;
aoqi@0:                 if (verbose) {
aoqi@0:                     log.printVerbose("loading", currentClassFile.toString());
aoqi@0:                 }
aoqi@0:                 if (classfile.getKind() == JavaFileObject.Kind.CLASS) {
aoqi@0:                     filling = true;
aoqi@0:                     try {
aoqi@0:                         bp = 0;
aoqi@0:                         buf = readInputStream(buf, classfile.openInputStream());
aoqi@0:                         readClassFile(c);
aoqi@0:                         if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
aoqi@0:                             List<Type> missing = missingTypeVariables;
aoqi@0:                             List<Type> found = foundTypeVariables;
aoqi@0:                             missingTypeVariables = List.nil();
aoqi@0:                             foundTypeVariables = List.nil();
aoqi@0:                             filling = false;
aoqi@0:                             ClassType ct = (ClassType)currentOwner.type;
aoqi@0:                             ct.supertype_field =
aoqi@0:                                 types.subst(ct.supertype_field, missing, found);
aoqi@0:                             ct.interfaces_field =
aoqi@0:                                 types.subst(ct.interfaces_field, missing, found);
aoqi@0:                         } else if (missingTypeVariables.isEmpty() !=
aoqi@0:                                    foundTypeVariables.isEmpty()) {
aoqi@0:                             Name name = missingTypeVariables.head.tsym.name;
aoqi@0:                             throw badClassFile("undecl.type.var", name);
aoqi@0:                         }
aoqi@0:                     } finally {
aoqi@0:                         missingTypeVariables = List.nil();
aoqi@0:                         foundTypeVariables = List.nil();
aoqi@0:                         filling = false;
aoqi@0:                     }
aoqi@0:                 } else {
aoqi@0:                     if (sourceCompleter != null) {
aoqi@0:                         sourceCompleter.complete(c);
aoqi@0:                     } else {
aoqi@0:                         throw new IllegalStateException("Source completer required to read "
aoqi@0:                                                         + classfile.toUri());
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:                 return;
aoqi@0:             } catch (IOException ex) {
aoqi@0:                 throw badClassFile("unable.to.access.file", ex.getMessage());
aoqi@0:             } finally {
aoqi@0:                 currentClassFile = previousClassFile;
aoqi@0:             }
aoqi@0:         } else {
aoqi@0:             JCDiagnostic diag =
aoqi@0:                 diagFactory.fragment("class.file.not.found", c.flatname);
aoqi@0:             throw
aoqi@0:                 newCompletionFailure(c, diag);
aoqi@0:         }
aoqi@0:     }
aoqi@0:     // where
aoqi@0:         private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
aoqi@0:             try {
aoqi@0:                 buf = ensureCapacity(buf, s.available());
aoqi@0:                 int r = s.read(buf);
aoqi@0:                 int bp = 0;
aoqi@0:                 while (r != -1) {
aoqi@0:                     bp += r;
aoqi@0:                     buf = ensureCapacity(buf, bp);
aoqi@0:                     r = s.read(buf, bp, buf.length - bp);
aoqi@0:                 }
aoqi@0:                 return buf;
aoqi@0:             } finally {
aoqi@0:                 try {
aoqi@0:                     s.close();
aoqi@0:                 } catch (IOException e) {
aoqi@0:                     /* Ignore any errors, as this stream may have already
aoqi@0:                      * thrown a related exception which is the one that
aoqi@0:                      * should be reported.
aoqi@0:                      */
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0:         /*
aoqi@0:          * ensureCapacity will increase the buffer as needed, taking note that
aoqi@0:          * the new buffer will always be greater than the needed and never
aoqi@0:          * exactly equal to the needed size or bp. If equal then the read (above)
aoqi@0:          * will infinitely loop as buf.length - bp == 0.
aoqi@0:          */
aoqi@0:         private static byte[] ensureCapacity(byte[] buf, int needed) {
aoqi@0:             if (buf.length <= needed) {
aoqi@0:                 byte[] old = buf;
aoqi@0:                 buf = new byte[Integer.highestOneBit(needed) << 1];
aoqi@0:                 System.arraycopy(old, 0, buf, 0, old.length);
aoqi@0:             }
aoqi@0:             return buf;
aoqi@0:         }
aoqi@0:         /** Static factory for CompletionFailure objects.
aoqi@0:          *  In practice, only one can be used at a time, so we share one
aoqi@0:          *  to reduce the expense of allocating new exception objects.
aoqi@0:          */
aoqi@0:         private CompletionFailure newCompletionFailure(TypeSymbol c,
aoqi@0:                                                        JCDiagnostic diag) {
aoqi@0:             if (!cacheCompletionFailure) {
aoqi@0:                 // log.warning("proc.messager",
aoqi@0:                 //             Log.getLocalizedString("class.file.not.found", c.flatname));
aoqi@0:                 // c.debug.printStackTrace();
aoqi@0:                 return new CompletionFailure(c, diag);
aoqi@0:             } else {
aoqi@0:                 CompletionFailure result = cachedCompletionFailure;
aoqi@0:                 result.sym = c;
aoqi@0:                 result.diag = diag;
aoqi@0:                 return result;
aoqi@0:             }
aoqi@0:         }
aoqi@0:         private CompletionFailure cachedCompletionFailure =
aoqi@0:             new CompletionFailure(null, (JCDiagnostic) null);
aoqi@0:         {
aoqi@0:             cachedCompletionFailure.setStackTrace(new StackTraceElement[0]);
aoqi@0:         }
aoqi@0: 
aoqi@0:     /** Load a toplevel class with given fully qualified name
aoqi@0:      *  The class is entered into `classes' only if load was successful.
aoqi@0:      */
aoqi@0:     public ClassSymbol loadClass(Name flatname) throws CompletionFailure {
aoqi@0:         boolean absent = classes.get(flatname) == null;
aoqi@0:         ClassSymbol c = enterClass(flatname);
aoqi@0:         if (c.members_field == null && c.completer != null) {
aoqi@0:             try {
aoqi@0:                 c.complete();
aoqi@0:             } catch (CompletionFailure ex) {
aoqi@0:                 if (absent) classes.remove(flatname);
aoqi@0:                 throw ex;
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return c;
aoqi@0:     }
aoqi@0: 
aoqi@0: /************************************************************************
aoqi@0:  * Loading Packages
aoqi@0:  ***********************************************************************/
aoqi@0: 
aoqi@0:     /** Check to see if a package exists, given its fully qualified name.
aoqi@0:      */
aoqi@0:     public boolean packageExists(Name fullname) {
aoqi@0:         return enterPackage(fullname).exists();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Make a package, given its fully qualified name.
aoqi@0:      */
aoqi@0:     public PackageSymbol enterPackage(Name fullname) {
aoqi@0:         PackageSymbol p = packages.get(fullname);
aoqi@0:         if (p == null) {
aoqi@0:             Assert.check(!fullname.isEmpty(), "rootPackage missing!");
aoqi@0:             p = new PackageSymbol(
aoqi@0:                 Convert.shortName(fullname),
aoqi@0:                 enterPackage(Convert.packagePart(fullname)));
aoqi@0:             p.completer = thisCompleter;
aoqi@0:             packages.put(fullname, p);
aoqi@0:         }
aoqi@0:         return p;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Make a package, given its unqualified name and enclosing package.
aoqi@0:      */
aoqi@0:     public PackageSymbol enterPackage(Name name, PackageSymbol owner) {
aoqi@0:         return enterPackage(TypeSymbol.formFullName(name, owner));
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Include class corresponding to given class file in package,
aoqi@0:      *  unless (1) we already have one the same kind (.class or .java), or
aoqi@0:      *         (2) we have one of the other kind, and the given class file
aoqi@0:      *             is older.
aoqi@0:      */
aoqi@0:     protected void includeClassFile(PackageSymbol p, JavaFileObject file) {
aoqi@0:         if ((p.flags_field & EXISTS) == 0)
aoqi@0:             for (Symbol q = p; q != null && q.kind == PCK; q = q.owner)
aoqi@0:                 q.flags_field |= EXISTS;
aoqi@0:         JavaFileObject.Kind kind = file.getKind();
aoqi@0:         int seen;
aoqi@0:         if (kind == JavaFileObject.Kind.CLASS)
aoqi@0:             seen = CLASS_SEEN;
aoqi@0:         else
aoqi@0:             seen = SOURCE_SEEN;
aoqi@0:         String binaryName = fileManager.inferBinaryName(currentLoc, file);
aoqi@0:         int lastDot = binaryName.lastIndexOf(".");
aoqi@0:         Name classname = names.fromString(binaryName.substring(lastDot + 1));
aoqi@0:         boolean isPkgInfo = classname == names.package_info;
aoqi@0:         ClassSymbol c = isPkgInfo
aoqi@0:             ? p.package_info
aoqi@0:             : (ClassSymbol) p.members_field.lookup(classname).sym;
aoqi@0:         if (c == null) {
aoqi@0:             c = enterClass(classname, p);
aoqi@0:             if (c.classfile == null) // only update the file if's it's newly created
aoqi@0:                 c.classfile = file;
aoqi@0:             if (isPkgInfo) {
aoqi@0:                 p.package_info = c;
aoqi@0:             } else {
aoqi@0:                 if (c.owner == p)  // it might be an inner class
aoqi@0:                     p.members_field.enter(c);
aoqi@0:             }
aoqi@0:         } else if (c.classfile != null && (c.flags_field & seen) == 0) {
aoqi@0:             // if c.classfile == null, we are currently compiling this class
aoqi@0:             // and no further action is necessary.
aoqi@0:             // if (c.flags_field & seen) != 0, we have already encountered
aoqi@0:             // a file of the same kind; again no further action is necessary.
aoqi@0:             if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0)
aoqi@0:                 c.classfile = preferredFileObject(file, c.classfile);
aoqi@0:         }
aoqi@0:         c.flags_field |= seen;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /** Implement policy to choose to derive information from a source
aoqi@0:      *  file or a class file when both are present.  May be overridden
aoqi@0:      *  by subclasses.
aoqi@0:      */
aoqi@0:     protected JavaFileObject preferredFileObject(JavaFileObject a,
aoqi@0:                                            JavaFileObject b) {
aoqi@0: 
aoqi@0:         if (preferSource)
aoqi@0:             return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b;
aoqi@0:         else {
aoqi@0:             long adate = a.getLastModified();
aoqi@0:             long bdate = b.getLastModified();
aoqi@0:             // 6449326: policy for bad lastModifiedTime in ClassReader
aoqi@0:             //assert adate >= 0 && bdate >= 0;
aoqi@0:             return (adate > bdate) ? a : b;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * specifies types of files to be read when filling in a package symbol
aoqi@0:      */
aoqi@0:     protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() {
aoqi@0:         return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * this is used to support javadoc
aoqi@0:      */
aoqi@0:     protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) {
aoqi@0:     }
aoqi@0: 
aoqi@0:     protected Location currentLoc; // FIXME
aoqi@0: 
aoqi@0:     private boolean verbosePath = true;
aoqi@0: 
aoqi@0:     /** Load directory of package into members scope.
aoqi@0:      */
aoqi@0:     private void fillIn(PackageSymbol p) throws IOException {
aoqi@0:         if (p.members_field == null) p.members_field = new Scope(p);
aoqi@0:         String packageName = p.fullname.toString();
aoqi@0: 
aoqi@0:         Set<JavaFileObject.Kind> kinds = getPackageFileKinds();
aoqi@0: 
aoqi@0:         fillIn(p, PLATFORM_CLASS_PATH,
aoqi@0:                fileManager.list(PLATFORM_CLASS_PATH,
aoqi@0:                                 packageName,
aoqi@0:                                 EnumSet.of(JavaFileObject.Kind.CLASS),
aoqi@0:                                 false));
aoqi@0: 
aoqi@0:         Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds);
aoqi@0:         classKinds.remove(JavaFileObject.Kind.SOURCE);
aoqi@0:         boolean wantClassFiles = !classKinds.isEmpty();
aoqi@0: 
aoqi@0:         Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds);
aoqi@0:         sourceKinds.remove(JavaFileObject.Kind.CLASS);
aoqi@0:         boolean wantSourceFiles = !sourceKinds.isEmpty();
aoqi@0: 
aoqi@0:         boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH);
aoqi@0: 
aoqi@0:         if (verbose && verbosePath) {
aoqi@0:             if (fileManager instanceof StandardJavaFileManager) {
aoqi@0:                 StandardJavaFileManager fm = (StandardJavaFileManager)fileManager;
aoqi@0:                 if (haveSourcePath && wantSourceFiles) {
aoqi@0:                     List<File> path = List.nil();
aoqi@0:                     for (File file : fm.getLocation(SOURCE_PATH)) {
aoqi@0:                         path = path.prepend(file);
aoqi@0:                     }
aoqi@0:                     log.printVerbose("sourcepath", path.reverse().toString());
aoqi@0:                 } else if (wantSourceFiles) {
aoqi@0:                     List<File> path = List.nil();
aoqi@0:                     for (File file : fm.getLocation(CLASS_PATH)) {
aoqi@0:                         path = path.prepend(file);
aoqi@0:                     }
aoqi@0:                     log.printVerbose("sourcepath", path.reverse().toString());
aoqi@0:                 }
aoqi@0:                 if (wantClassFiles) {
aoqi@0:                     List<File> path = List.nil();
aoqi@0:                     for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) {
aoqi@0:                         path = path.prepend(file);
aoqi@0:                     }
aoqi@0:                     for (File file : fm.getLocation(CLASS_PATH)) {
aoqi@0:                         path = path.prepend(file);
aoqi@0:                     }
aoqi@0:                     log.printVerbose("classpath",  path.reverse().toString());
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         if (wantSourceFiles && !haveSourcePath) {
aoqi@0:             fillIn(p, CLASS_PATH,
aoqi@0:                    fileManager.list(CLASS_PATH,
aoqi@0:                                     packageName,
aoqi@0:                                     kinds,
aoqi@0:                                     false));
aoqi@0:         } else {
aoqi@0:             if (wantClassFiles)
aoqi@0:                 fillIn(p, CLASS_PATH,
aoqi@0:                        fileManager.list(CLASS_PATH,
aoqi@0:                                         packageName,
aoqi@0:                                         classKinds,
aoqi@0:                                         false));
aoqi@0:             if (wantSourceFiles)
aoqi@0:                 fillIn(p, SOURCE_PATH,
aoqi@0:                        fileManager.list(SOURCE_PATH,
aoqi@0:                                         packageName,
aoqi@0:                                         sourceKinds,
aoqi@0:                                         false));
aoqi@0:         }
aoqi@0:         verbosePath = false;
aoqi@0:     }
aoqi@0:     // where
aoqi@0:         private void fillIn(PackageSymbol p,
aoqi@0:                             Location location,
aoqi@0:                             Iterable<JavaFileObject> files)
aoqi@0:         {
aoqi@0:             currentLoc = location;
aoqi@0:             for (JavaFileObject fo : files) {
aoqi@0:                 switch (fo.getKind()) {
aoqi@0:                 case CLASS:
aoqi@0:                 case SOURCE: {
aoqi@0:                     // TODO pass binaryName to includeClassFile
aoqi@0:                     String binaryName = fileManager.inferBinaryName(currentLoc, fo);
aoqi@0:                     String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1);
aoqi@0:                     if (SourceVersion.isIdentifier(simpleName) ||
aoqi@0:                         simpleName.equals("package-info"))
aoqi@0:                         includeClassFile(p, fo);
aoqi@0:                     break;
aoqi@0:                 }
aoqi@0:                 default:
aoqi@0:                     extraFileActions(p, fo);
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:     /** Output for "-checkclassfile" option.
aoqi@0:      *  @param key The key to look up the correct internationalized string.
aoqi@0:      *  @param arg An argument for substitution into the output string.
aoqi@0:      */
aoqi@0:     private void printCCF(String key, Object arg) {
aoqi@0:         log.printLines(key, arg);
aoqi@0:     }
aoqi@0: 
aoqi@0: 
aoqi@0:     public interface SourceCompleter {
aoqi@0:         void complete(ClassSymbol sym)
aoqi@0:             throws CompletionFailure;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
aoqi@0:      * The attribute is only the last component of the original filename, so is unlikely
aoqi@0:      * to be valid as is, so operations other than those to access the name throw
aoqi@0:      * UnsupportedOperationException
aoqi@0:      */
aoqi@0:     private static class SourceFileObject extends BaseFileObject {
aoqi@0: 
aoqi@0:         /** The file's name.
aoqi@0:          */
aoqi@0:         private Name name;
aoqi@0:         private Name flatname;
aoqi@0: 
aoqi@0:         public SourceFileObject(Name name, Name flatname) {
aoqi@0:             super(null); // no file manager; never referenced for this file object
aoqi@0:             this.name = name;
aoqi@0:             this.flatname = flatname;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public URI toUri() {
aoqi@0:             try {
aoqi@0:                 return new URI(null, name.toString(), null);
aoqi@0:             } catch (URISyntaxException e) {
aoqi@0:                 throw new CannotCreateUriError(name.toString(), e);
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String getName() {
aoqi@0:             return name.toString();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String getShortName() {
aoqi@0:             return getName();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public JavaFileObject.Kind getKind() {
aoqi@0:             return getKind(getName());
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public InputStream openInputStream() {
aoqi@0:             throw new UnsupportedOperationException();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public OutputStream openOutputStream() {
aoqi@0:             throw new UnsupportedOperationException();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
aoqi@0:             throw new UnsupportedOperationException();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public Reader openReader(boolean ignoreEncodingErrors) {
aoqi@0:             throw new UnsupportedOperationException();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public Writer openWriter() {
aoqi@0:             throw new UnsupportedOperationException();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public long getLastModified() {
aoqi@0:             throw new UnsupportedOperationException();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public boolean delete() {
aoqi@0:             throw new UnsupportedOperationException();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         protected String inferBinaryName(Iterable<? extends File> path) {
aoqi@0:             return flatname.toString();
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
aoqi@0:             return true; // fail-safe mode
aoqi@0:         }
aoqi@0: 
aoqi@0:         /**
aoqi@0:          * Check if two file objects are equal.
aoqi@0:          * SourceFileObjects are just placeholder objects for the value of a
aoqi@0:          * SourceFile attribute, and do not directly represent specific files.
aoqi@0:          * Two SourceFileObjects are equal if their names are equal.
aoqi@0:          */
aoqi@0:         @Override
aoqi@0:         public boolean equals(Object other) {
aoqi@0:             if (this == other)
aoqi@0:                 return true;
aoqi@0: 
aoqi@0:             if (!(other instanceof SourceFileObject))
aoqi@0:                 return false;
aoqi@0: 
aoqi@0:             SourceFileObject o = (SourceFileObject) other;
aoqi@0:             return name.equals(o.name);
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public int hashCode() {
aoqi@0:             return name.hashCode();
aoqi@0:         }
aoqi@0:     }
aoqi@0: }