/*
* Copyright (c) 2002, 2004, Oracle and/or its affiliates. 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.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;
}
}