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416 lines
12 KiB
Java
416 lines
12 KiB
Java
/*
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* Copyright 2002-2008 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package sun.tools.javap;
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import java.util.*;
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import java.io.*;
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import static sun.tools.javap.RuntimeConstants.*;
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/**
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* Strores method data informastion.
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*
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* @author Sucheta Dambalkar (Adopted code from jdis)
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*/
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public class MethodData {
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ClassData cls;
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int access;
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int name_index;
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int descriptor_index;
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int attributes_count;
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byte[] code;
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Vector<TrapData> exception_table = new Vector<TrapData>(0);
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Vector<LineNumData> lin_num_tb = new Vector<LineNumData>(0);
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Vector<LocVarData> loc_var_tb = new Vector<LocVarData>(0);
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StackMapTableData[] stackMapTable;
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StackMapData[] stackMap;
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int[] exc_index_table=null;
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Vector<AttrData> attrs=new Vector<AttrData>(0);
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Vector<AttrData> code_attrs=new Vector<AttrData>(0);
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int max_stack, max_locals;
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boolean isSynthetic=false;
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boolean isDeprecated=false;
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public MethodData(ClassData cls){
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this.cls=cls;
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}
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/**
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* Read method info.
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*/
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public void read(DataInputStream in) throws IOException {
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access = in.readUnsignedShort();
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name_index=in.readUnsignedShort();
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descriptor_index =in.readUnsignedShort();
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int attributes_count = in.readUnsignedShort();
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for (int i = 0; i < attributes_count; i++) {
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int attr_name_index=in.readUnsignedShort();
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readAttr: {
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if (cls.getTag(attr_name_index)==CONSTANT_UTF8) {
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String attr_name=cls.getString(attr_name_index);
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if ( attr_name.equals("Code")){
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readCode (in);
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AttrData attr=new AttrData(cls);
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attr.read(attr_name_index);
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attrs.addElement(attr);
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break readAttr;
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} else if ( attr_name.equals("Exceptions")){
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readExceptions(in);
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AttrData attr=new AttrData(cls);
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attr.read(attr_name_index);
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attrs.addElement(attr);
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break readAttr;
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} else if (attr_name.equals("Synthetic")){
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if (in.readInt()!=0)
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throw new ClassFormatError("invalid Synthetic attr length");
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isSynthetic=true;
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AttrData attr=new AttrData(cls);
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attr.read(attr_name_index);
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attrs.addElement(attr);
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break readAttr;
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} else if (attr_name.equals("Deprecated")){
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if (in.readInt()!=0)
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throw new ClassFormatError("invalid Synthetic attr length");
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isDeprecated = true;
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AttrData attr=new AttrData(cls);
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attr.read(attr_name_index);
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attrs.addElement(attr);
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break readAttr;
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}
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}
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AttrData attr=new AttrData(cls);
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attr.read(attr_name_index, in);
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attrs.addElement(attr);
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}
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}
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}
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/**
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* Read code attribute info.
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*/
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public void readCode(DataInputStream in) throws IOException {
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int attr_length = in.readInt();
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max_stack=in.readUnsignedShort();
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max_locals=in.readUnsignedShort();
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int codelen=in.readInt();
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code=new byte[codelen];
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int totalread = 0;
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while(totalread < codelen){
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totalread += in.read(code, totalread, codelen-totalread);
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}
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// in.read(code, 0, codelen);
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int clen = 0;
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readExceptionTable(in);
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int code_attributes_count = in.readUnsignedShort();
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for (int k = 0 ; k < code_attributes_count ; k++) {
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int table_name_index=in.readUnsignedShort();
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int table_name_tag=cls.getTag(table_name_index);
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AttrData attr=new AttrData(cls);
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if (table_name_tag==CONSTANT_UTF8) {
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String table_name_tstr=cls.getString(table_name_index);
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if (table_name_tstr.equals("LineNumberTable")) {
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readLineNumTable(in);
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attr.read(table_name_index);
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} else if (table_name_tstr.equals("LocalVariableTable")) {
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readLocVarTable(in);
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attr.read(table_name_index);
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} else if (table_name_tstr.equals("StackMapTable")) {
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readStackMapTable(in);
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attr.read(table_name_index);
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} else if (table_name_tstr.equals("StackMap")) {
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readStackMap(in);
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attr.read(table_name_index);
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} else {
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attr.read(table_name_index, in);
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}
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code_attrs.addElement(attr);
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continue;
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}
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attr.read(table_name_index, in);
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code_attrs.addElement(attr);
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}
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}
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/**
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* Read exception table info.
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*/
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void readExceptionTable (DataInputStream in) throws IOException {
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int exception_table_len=in.readUnsignedShort();
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exception_table=new Vector<TrapData>(exception_table_len);
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for (int l = 0; l < exception_table_len; l++) {
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exception_table.addElement(new TrapData(in, l));
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}
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}
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/**
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* Read LineNumberTable attribute info.
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*/
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void readLineNumTable (DataInputStream in) throws IOException {
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int attr_len = in.readInt(); // attr_length
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int lin_num_tb_len = in.readUnsignedShort();
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lin_num_tb=new Vector<LineNumData>(lin_num_tb_len);
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for (int l = 0; l < lin_num_tb_len; l++) {
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lin_num_tb.addElement(new LineNumData(in));
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}
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}
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/**
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* Read LocalVariableTable attribute info.
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*/
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void readLocVarTable (DataInputStream in) throws IOException {
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int attr_len=in.readInt(); // attr_length
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int loc_var_tb_len = in.readUnsignedShort();
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loc_var_tb = new Vector<LocVarData>(loc_var_tb_len);
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for (int l = 0; l < loc_var_tb_len; l++) {
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loc_var_tb.addElement(new LocVarData(in));
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}
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}
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/**
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* Read Exception attribute info.
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*/
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public void readExceptions(DataInputStream in) throws IOException {
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int attr_len=in.readInt(); // attr_length in prog
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int num_exceptions = in.readUnsignedShort();
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exc_index_table=new int[num_exceptions];
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for (int l = 0; l < num_exceptions; l++) {
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int exc=in.readShort();
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exc_index_table[l]=exc;
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}
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}
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/**
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* Read StackMapTable attribute info.
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*/
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void readStackMapTable(DataInputStream in) throws IOException {
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int attr_len = in.readInt(); //attr_length
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int stack_map_tb_len = in.readUnsignedShort();
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stackMapTable = new StackMapTableData[stack_map_tb_len];
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for (int i=0; i<stack_map_tb_len; i++) {
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stackMapTable[i] = StackMapTableData.getInstance(in, this);
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}
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}
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/**
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* Read StackMap attribute info.
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*/
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void readStackMap(DataInputStream in) throws IOException {
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int attr_len = in.readInt(); //attr_length
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int stack_map_len = in.readUnsignedShort();
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stackMap = new StackMapData[stack_map_len];
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for (int i = 0; i<stack_map_len; i++) {
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stackMap[i] = new StackMapData(in, this);
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}
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}
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/**
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* Return access of the method.
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*/
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public String[] getAccess(){
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Vector<String> v = new Vector<String>();
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if ((access & ACC_PUBLIC) !=0) v.addElement("public");
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if ((access & ACC_PRIVATE) !=0) v.addElement("private");
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if ((access & ACC_PROTECTED) !=0) v.addElement("protected");
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if ((access & ACC_STATIC) !=0) v.addElement("static");
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if ((access & ACC_FINAL) !=0) v.addElement("final");
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if ((access & ACC_SYNCHRONIZED) !=0) v.addElement("synchronized");
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if ((access & ACC_NATIVE) !=0) v.addElement("native");
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if ((access & ACC_ABSTRACT) !=0) v.addElement("abstract");
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if ((access & ACC_STRICT) !=0) v.addElement("strictfp");
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String[] accflags = new String[v.size()];
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v.copyInto(accflags);
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return accflags;
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}
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/**
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* Return name of the method.
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*/
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public String getName(){
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return cls.getStringValue(name_index);
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}
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/**
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* Return internal siganature of the method.
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*/
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public String getInternalSig(){
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return cls.getStringValue(descriptor_index);
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}
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/**
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* Return java return type signature of method.
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*/
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public String getReturnType(){
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String rttype = (new TypeSignature(getInternalSig())).getReturnType();
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return rttype;
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}
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/**
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* Return java type parameter signature.
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*/
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public String getParameters(){
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String ptype = (new TypeSignature(getInternalSig())).getParameters();
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return ptype;
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}
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/**
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* Return code attribute data of a method.
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*/
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public byte[] getCode(){
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return code;
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}
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/**
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* Return LineNumberTable size.
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*/
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public int getnumlines(){
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return lin_num_tb.size();
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}
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/**
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* Return LineNumberTable
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*/
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public Vector<?> getlin_num_tb(){
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return lin_num_tb;
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}
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/**
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* Return LocalVariableTable size.
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*/
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public int getloc_var_tbsize(){
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return loc_var_tb.size();
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}
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/**
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* Return LocalVariableTable.
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*/
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public Vector<?> getloc_var_tb(){
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return loc_var_tb;
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}
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/**
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* Return StackMap.
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*/
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public StackMapData[] getStackMap() {
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return stackMap;
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}
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/**
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* Return StackMapTable.
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*/
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public StackMapTableData[] getStackMapTable() {
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return stackMapTable;
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}
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/**
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* Return number of arguments of that method.
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*/
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public int getArgumentlength(){
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return new TypeSignature(getInternalSig()).getArgumentlength();
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}
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/**
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* Return true if method is static
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*/
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public boolean isStatic(){
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if ((access & ACC_STATIC) !=0) return true;
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return false;
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}
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/**
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* Return max depth of operand stack.
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*/
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public int getMaxStack(){
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return max_stack;
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}
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/**
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* Return number of local variables.
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*/
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public int getMaxLocals(){
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return max_locals;
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}
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/**
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* Return exception index table in Exception attribute.
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*/
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public int []get_exc_index_table(){
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return exc_index_table;
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}
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/**
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* Return exception table in code attributre.
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*/
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public Vector<?> getexception_table(){
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return exception_table;
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}
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/**
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* Return method attributes.
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*/
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public Vector<?> getAttributes(){
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return attrs;
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}
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/**
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* Return code attributes.
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*/
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public Vector<?> getCodeAttributes(){
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return code_attrs;
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}
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/**
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* Return true if method id synthetic.
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*/
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public boolean isSynthetic(){
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return isSynthetic;
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}
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/**
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* Return true if method is deprecated.
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*/
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public boolean isDeprecated(){
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return isDeprecated;
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}
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}
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