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langtools/src/share/classes/sun/tools/javap/ClassData.java

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+/*
+ * Copyright 2002-2004 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+
+package sun.tools.javap;
+
+import java.util.*;
+import java.io.*;
+
+/**
+ * Central data repository of the Java Disassembler.
+ * Stores all the information in java class file.
+ *
+ * @author  Sucheta Dambalkar (Adopted code from jdis)
+ */
+public class ClassData implements RuntimeConstants {
+
+    private int magic;
+    private int minor_version;
+    private int major_version;
+    private int cpool_count;
+    private Object cpool[];
+    private int access;
+    private int this_class = 0;;
+    private int super_class;
+    private int interfaces_count;
+    private int[] interfaces = new int[0];;
+    private int fields_count;
+    private FieldData[] fields;
+    private int methods_count;
+    private MethodData[] methods;
+    private InnerClassData[] innerClasses;
+    private int attributes_count;
+    private AttrData[] attrs;
+    private String classname;
+    private String superclassname;
+    private int source_cpx=0;
+    private byte tags[];
+    private Hashtable indexHashAscii = new Hashtable();
+    private String pkgPrefix="";
+    private int pkgPrefixLen=0;
+
+    /**
+     * Read classfile to disassemble.
+     */
+    public ClassData(InputStream infile){
+        try{
+            this.read(new DataInputStream(infile));
+        }catch (FileNotFoundException ee) {
+            error("cant read file");
+        }catch (Error ee) {
+            ee.printStackTrace();
+            error("fatal error");
+        } catch (Exception ee) {
+            ee.printStackTrace();
+            error("fatal exception");
+        }
+    }
+
+    /**
+     * Reads and stores class file information.
+     */
+    public void read(DataInputStream in) throws IOException {
+        // Read the header
+        magic = in.readInt();
+        if (magic != JAVA_MAGIC) {
+            throw new ClassFormatError("wrong magic: " +
+                                       toHex(magic) + ", expected " +
+                                       toHex(JAVA_MAGIC));
+        }
+        minor_version = in.readShort();
+        major_version = in.readShort();
+        if (major_version != JAVA_VERSION) {
+        }
+
+        // Read the constant pool
+        readCP(in);
+        access = in.readUnsignedShort();
+        this_class = in.readUnsignedShort();
+        super_class = in.readUnsignedShort();
+
+        //Read interfaces.
+        interfaces_count = in.readUnsignedShort();
+        if(interfaces_count > 0){
+            interfaces = new int[interfaces_count];
+        }
+        for (int i = 0; i < interfaces_count; i++) {
+            interfaces[i]=in.readShort();
+        }
+
+        // Read the fields
+        readFields(in);
+
+        // Read the methods
+        readMethods(in);
+
+        // Read the attributes
+        attributes_count = in.readUnsignedShort();
+        attrs=new AttrData[attributes_count];
+        for (int k = 0; k < attributes_count; k++) {
+            int name_cpx=in.readUnsignedShort();
+            if (getTag(name_cpx)==CONSTANT_UTF8
+                && getString(name_cpx).equals("SourceFile")
+                ){      if (in.readInt()!=2)
+                    throw new ClassFormatError("invalid attr length");
+                source_cpx=in.readUnsignedShort();
+                AttrData attr=new AttrData(this);
+                attr.read(name_cpx);
+                attrs[k]=attr;
+
+            } else if (getTag(name_cpx)==CONSTANT_UTF8
+                       && getString(name_cpx).equals("InnerClasses")
+                       ){       int length=in.readInt();
+                       int num=in.readUnsignedShort();
+                       if (2+num*8 != length)
+                           throw new ClassFormatError("invalid attr length");
+                       innerClasses=new InnerClassData[num];
+                       for (int j = 0; j < num; j++) {
+                           InnerClassData innerClass=new InnerClassData(this);
+                           innerClass.read(in);
+                           innerClasses[j]=innerClass;
+                       }
+                       AttrData attr=new AttrData(this);
+                       attr.read(name_cpx);
+                       attrs[k]=attr;
+            } else {
+                AttrData attr=new AttrData(this);
+                attr.read(name_cpx, in);
+                attrs[k]=attr;
+            }
+        }
+        in.close();
+    } // end ClassData.read()
+
+    /**
+     * Reads and stores constant pool info.
+     */
+    void readCP(DataInputStream in) throws IOException {
+        cpool_count = in.readUnsignedShort();
+        tags = new byte[cpool_count];
+        cpool = new Object[cpool_count];
+        for (int i = 1; i < cpool_count; i++) {
+            byte tag = in.readByte();
+
+            switch(tags[i] = tag) {
+            case CONSTANT_UTF8:
+                String str=in.readUTF();
+                indexHashAscii.put(cpool[i] = str, new Integer(i));
+                break;
+            case CONSTANT_INTEGER:
+                cpool[i] = new Integer(in.readInt());
+                break;
+            case CONSTANT_FLOAT:
+                cpool[i] = new Float(in.readFloat());
+                break;
+            case CONSTANT_LONG:
+                cpool[i++] = new Long(in.readLong());
+                break;
+            case CONSTANT_DOUBLE:
+                cpool[i++] = new Double(in.readDouble());
+                break;
+            case CONSTANT_CLASS:
+            case CONSTANT_STRING:
+                cpool[i] = new CPX(in.readUnsignedShort());
+                break;
+
+            case CONSTANT_FIELD:
+            case CONSTANT_METHOD:
+            case CONSTANT_INTERFACEMETHOD:
+            case CONSTANT_NAMEANDTYPE:
+                cpool[i] = new CPX2(in.readUnsignedShort(), in.readUnsignedShort());
+                break;
+
+            case 0:
+            default:
+                throw new ClassFormatError("invalid constant type: " + (int)tags[i]);
+            }
+        }
+    }
+
+    /**
+     * Reads and strores field info.
+     */
+    protected void readFields(DataInputStream in) throws IOException {
+        int fields_count = in.readUnsignedShort();
+        fields=new FieldData[fields_count];
+        for (int k = 0; k < fields_count; k++) {
+            FieldData field=new FieldData(this);
+            field.read(in);
+            fields[k]=field;
+        }
+    }
+
+    /**
+     * Reads and strores Method info.
+     */
+    protected void readMethods(DataInputStream in) throws IOException {
+        int methods_count = in.readUnsignedShort();
+        methods=new MethodData[methods_count];
+        for (int k = 0; k < methods_count ; k++) {
+            MethodData method=new MethodData(this);
+            method.read(in);
+            methods[k]=method;
+        }
+    }
+
+    /**
+     * get a string
+     */
+    public String getString(int n) {
+        return (n == 0) ? null : (String)cpool[n];
+    }
+
+    /**
+     * get the type of constant given an index
+     */
+    public byte getTag(int n) {
+        try{
+            return tags[n];
+        } catch (ArrayIndexOutOfBoundsException e) {
+            return (byte)100;
+        }
+    }
+
+    static final String hexString="0123456789ABCDEF";
+
+    public static char hexTable[]=hexString.toCharArray();
+
+    static String toHex(long val, int width) {
+        StringBuffer s = new StringBuffer();
+        for (int i=width-1; i>=0; i--)
+            s.append(hexTable[((int)(val>>(4*i)))&0xF]);
+        return "0x"+s.toString();
+    }
+
+    static String toHex(long val) {
+        int width;
+        for (width=16; width>0; width--) {
+            if ((val>>(width-1)*4)!=0) break;
+        }
+        return toHex(val, width);
+    }
+
+    static String toHex(int val) {
+        int width;
+        for (width=8; width>0; width--) {
+            if ((val>>(width-1)*4)!=0) break;
+        }
+        return toHex(val, width);
+    }
+
+    public void error(String msg) {
+        System.err.println("ERROR:" +msg);
+    }
+
+    /**
+     * Returns the name of this class.
+     */
+    public String getClassName() {
+        String res=null;
+        if (this_class==0) {
+            return res;
+        }
+        int tcpx;
+        try {
+            if (tags[this_class]!=CONSTANT_CLASS) {
+                return res; //"<CP["+cpx+"] is not a Class> ";
+            }
+            tcpx=((CPX)cpool[this_class]).cpx;
+        } catch (ArrayIndexOutOfBoundsException e) {
+            return res; // "#"+cpx+"// invalid constant pool index";
+        } catch (Throwable e) {
+            return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
+        }
+
+        try {
+            return (String)(cpool[tcpx]);
+        } catch (ArrayIndexOutOfBoundsException e) {
+            return  res; // "class #"+scpx+"// invalid constant pool index";
+        } catch (ClassCastException e) {
+            return  res; // "class #"+scpx+"// invalid constant pool reference";
+        } catch (Throwable e) {
+            return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
+        }
+
+    }
+
+    /**
+     * Returns the name of class at perticular index.
+     */
+    public String getClassName(int cpx) {
+        String res="#"+cpx;
+        if (cpx==0) {
+            return res;
+        }
+        int scpx;
+        try {
+            if (tags[cpx]!=CONSTANT_CLASS) {
+                return res; //"<CP["+cpx+"] is not a Class> ";
+            }
+            scpx=((CPX)cpool[cpx]).cpx;
+        } catch (ArrayIndexOutOfBoundsException e) {
+            return res; // "#"+cpx+"// invalid constant pool index";
+        } catch (Throwable e) {
+            return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
+        }
+        res="#"+scpx;
+        try {
+            return (String)(cpool[scpx]);
+        } catch (ArrayIndexOutOfBoundsException e) {
+            return  res; // "class #"+scpx+"// invalid constant pool index";
+        } catch (ClassCastException e) {
+            return  res; // "class #"+scpx+"// invalid constant pool reference";
+        } catch (Throwable e) {
+            return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
+        }
+    }
+
+    /**
+     * Returns true if it is a class
+     */
+    public boolean isClass() {
+        if((access & ACC_INTERFACE) == 0) return true;
+        return false;
+    }
+
+    /**
+     * Returns true if it is a interface.
+     */
+    public boolean isInterface(){
+        if((access & ACC_INTERFACE) != 0) return true;
+        return false;
+    }
+
+    /**
+     * Returns true if this member is public, false otherwise.
+     */
+    public boolean isPublic(){
+        return (access & ACC_PUBLIC) != 0;
+    }
+
+    /**
+     * Returns the access of this class or interface.
+     */
+    public String[] getAccess(){
+        Vector v = new Vector();
+        if ((access & ACC_PUBLIC)   !=0) v.addElement("public");
+        if ((access & ACC_FINAL)    !=0) v.addElement("final");
+        if ((access & ACC_ABSTRACT) !=0) v.addElement("abstract");
+        String[] accflags = new String[v.size()];
+        v.copyInto(accflags);
+        return accflags;
+    }
+
+    /**
+     * Returns list of innerclasses.
+     */
+    public InnerClassData[] getInnerClasses(){
+        return innerClasses;
+    }
+
+    /**
+     * Returns list of attributes.
+     */
+    public AttrData[] getAttributes(){
+        return attrs;
+    }
+
+    /**
+     * Returns true if superbit is set.
+     */
+    public boolean isSuperSet(){
+        if ((access & ACC_SUPER)   !=0) return true;
+        return false;
+    }
+
+    /**
+     * Returns super class name.
+     */
+    public String getSuperClassName(){
+        String res=null;
+        if (super_class==0) {
+            return res;
+        }
+        int scpx;
+        try {
+            if (tags[super_class]!=CONSTANT_CLASS) {
+                return res; //"<CP["+cpx+"] is not a Class> ";
+            }
+            scpx=((CPX)cpool[super_class]).cpx;
+        } catch (ArrayIndexOutOfBoundsException e) {
+            return res; // "#"+cpx+"// invalid constant pool index";
+        } catch (Throwable e) {
+            return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
+        }
+
+        try {
+            return (String)(cpool[scpx]);
+        } catch (ArrayIndexOutOfBoundsException e) {
+            return  res; // "class #"+scpx+"// invalid constant pool index";
+        } catch (ClassCastException e) {
+            return  res; // "class #"+scpx+"// invalid constant pool reference";
+        } catch (Throwable e) {
+            return res; // "#"+cpx+"// ERROR IN DISASSEMBLER";
+        }
+    }
+
+    /**
+     * Returns list of super interfaces.
+     */
+    public String[] getSuperInterfaces(){
+        String interfacenames[] = new String[interfaces.length];
+        int interfacecpx = -1;
+        for(int i = 0; i < interfaces.length; i++){
+            interfacecpx=((CPX)cpool[interfaces[i]]).cpx;
+            interfacenames[i] = (String)(cpool[interfacecpx]);
+        }
+        return interfacenames;
+    }
+
+    /**
+     * Returns string at prticular constant pool index.
+     */
+    public String getStringValue(int cpoolx) {
+        try {
+            return ((String)cpool[cpoolx]);
+        } catch (ArrayIndexOutOfBoundsException e) {
+            return "//invalid constant pool index:"+cpoolx;
+        } catch (ClassCastException e) {
+            return "//invalid constant pool ref:"+cpoolx;
+        }
+    }
+
+    /**
+     * Returns list of field info.
+     */
+    public  FieldData[] getFields(){
+        return fields;
+    }
+
+    /**
+     * Returns list of method info.
+     */
+    public  MethodData[] getMethods(){
+        return methods;
+    }
+
+    /**
+     * Returns constant pool entry at that index.
+     */
+    public CPX2 getCpoolEntry(int cpx){
+        return ((CPX2)(cpool[cpx]));
+    }
+
+    public Object getCpoolEntryobj(int cpx){
+        return (cpool[cpx]);
+    }
+
+    /**
+     * Returns index of this class.
+     */
+    public int getthis_cpx(){
+        return this_class;
+    }
+
+    public String TagString (int tag) {
+        String res=Tables.tagName(tag);
+        if (res==null)  return "BOGUS_TAG:"+tag;
+        return res;
+    }
+
+    /**
+     * Returns string at that index.
+     */
+    public String StringValue(int cpx) {
+        if (cpx==0) return "#0";
+        int tag;
+        Object x;
+        String suffix="";
+        try {
+            tag=tags[cpx];
+            x=cpool[cpx];
+        } catch (IndexOutOfBoundsException e) {
+            return "<Incorrect CP index:"+cpx+">";
+        }
+
+        if (x==null) return "<NULL>";
+        switch (tag) {
+        case CONSTANT_UTF8: {
+            StringBuffer sb=new StringBuffer();
+            String s=(String)x;
+            for (int k=0; k<s.length(); k++) {
+                char c=s.charAt(k);
+                switch (c) {
+                case '\t': sb.append('\\').append('t'); break;
+                case '\n': sb.append('\\').append('n'); break;
+                case '\r': sb.append('\\').append('r'); break;
+                case '\"': sb.append('\\').append('\"'); break;
+                default: sb.append(c);
+                }
+            }
+            return sb.toString();
+        }
+        case CONSTANT_DOUBLE: {
+            Double d=(Double)x;
+            String sd=d.toString();
+            return sd+"d";
+        }
+        case CONSTANT_FLOAT: {
+            Float f=(Float)x;
+            String sf=(f).toString();
+            return sf+"f";
+        }
+        case CONSTANT_LONG: {
+            Long ln = (Long)x;
+            return ln.toString()+'l';
+        }
+        case CONSTANT_INTEGER: {
+            Integer in = (Integer)x;
+            return in.toString();
+        }
+        case CONSTANT_CLASS:
+            return javaName(getClassName(cpx));
+        case CONSTANT_STRING:
+            return StringValue(((CPX)x).cpx);
+        case CONSTANT_FIELD:
+        case CONSTANT_METHOD:
+        case CONSTANT_INTERFACEMETHOD:
+            //return getShortClassName(((CPX2)x).cpx1)+"."+StringValue(((CPX2)x).cpx2);
+             return javaName(getClassName(((CPX2)x).cpx1))+"."+StringValue(((CPX2)x).cpx2);
+
+        case CONSTANT_NAMEANDTYPE:
+            return getName(((CPX2)x).cpx1)+":"+StringValue(((CPX2)x).cpx2);
+        default:
+            return "UnknownTag"; //TBD
+        }
+    }
+
+    /**
+     * Returns resolved java type name.
+     */
+    public String javaName(String name) {
+        if( name==null) return "null";
+        int len=name.length();
+        if (len==0) return "\"\"";
+        int cc='/';
+    fullname: { // xxx/yyy/zzz
+            int cp;
+            for (int k=0; k<len; k += Character.charCount(cp)) {
+                cp=name.codePointAt(k);
+                if (cc=='/') {
+                    if (!Character.isJavaIdentifierStart(cp)) break fullname;
+                } else if (cp!='/') {
+                    if (!Character.isJavaIdentifierPart(cp)) break fullname;
+                }
+                cc=cp;
+            }
+            return name;
+        }
+        return "\""+name+"\"";
+    }
+
+    public String getName(int cpx) {
+        String res;
+        try {
+            return javaName((String)cpool[cpx]); //.replace('/','.');
+        } catch (ArrayIndexOutOfBoundsException e) {
+            return "<invalid constant pool index:"+cpx+">";
+        } catch (ClassCastException e) {
+            return "<invalid constant pool ref:"+cpx+">";
+        }
+    }
+
+    /**
+     * Returns unqualified class name.
+     */
+    public String getShortClassName(int cpx) {
+        String classname=javaName(getClassName(cpx));
+        pkgPrefixLen=classname.lastIndexOf("/")+1;
+        if (pkgPrefixLen!=0) {
+            pkgPrefix=classname.substring(0,pkgPrefixLen);
+            if (classname.startsWith(pkgPrefix)) {
+                return classname.substring(pkgPrefixLen);
+            }
+        }
+        return classname;
+    }
+
+    /**
+     * Returns source file name.
+     */
+    public String getSourceName(){
+        return getName(source_cpx);
+    }
+
+    /**
+     * Returns package name.
+     */
+    public String getPkgName(){
+        String classname=getClassName(this_class);
+        pkgPrefixLen=classname.lastIndexOf("/")+1;
+        if (pkgPrefixLen!=0) {
+            pkgPrefix=classname.substring(0,pkgPrefixLen);
+            return("package  "+pkgPrefix.substring(0,pkgPrefixLen-1)+";\n");
+        }else return null;
+    }
+
+    /**
+     * Returns total constant pool entry count.
+     */
+    public int getCpoolCount(){
+        return cpool_count;
+    }
+
+    public String StringTag(int cpx) {
+        byte tag=0;
+        String str=null;
+        try {
+            if (cpx==0) throw new IndexOutOfBoundsException();
+            tag=tags[cpx];
+            return      TagString(tag);
+        } catch (IndexOutOfBoundsException e) {
+            str="Incorrect CP index:"+cpx;
+        }
+        return str;
+    }
+
+    /**
+     * Returns minor version of class file.
+     */
+    public int getMinor_version(){
+        return minor_version;
+    }
+
+    /**
+     * Returns major version of class file.
+     */
+    public int getMajor_version(){
+        return major_version;
+    }
+}