EVMClass.java

/*
 *   
 *
 * Copyright  1990-2009 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program 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.
 * 
 * This program 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 at /legal/license.txt).
 * 
 * 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 or visit www.sun.com if you need additional
 * information or have any questions.
 */

package vm;
/*
 * EVM-specific internal representation of
 * a class. Target-machine independent.
 * There is a references from each instance of components.ClassInfo to 
 * one of these, and a reference back as well.
 * Derived from the JDK-specific ClassClass
 *
 * !!See also EVMVM for VM-specific info not associated directly with a class.
 */
import components.*;
import util.*;
import jcc.Const;
import jcc.EVMConst;
import java.util.Enumeration;
import java.util.Vector;
import java.util.Hashtable;
import java.util.StringTokenizer;

public class
EVMClass extends ClassClass implements Const, EVMConst {
    public EVMMethodInfo	methods[];
    private String		myNativeName;
    protected int		typeCode = 0;

    public int			nStaticWords;
    public int			nStaticRef;
    public FieldInfo		statics[];

    public EVMClass( ClassInfo c ){
	ci = c;
	c.vmClass = this;

	if ( c.methods != null ){
	    // per-method, EVM-specific info.
	    methods = new EVMMethodInfo[ c.methods.length ];
	    for( int i = 0; i < methods.length; i++ ){
		components.MethodInfo m = c.methods[i];
		methods[i] = new EVMMethodInfo( m );
		if (!hasStaticInitializer &&
		    m.isStaticMember() &&
		    m.name.string.equals(/*NOI18N*/"<clinit>")) {
		    hasStaticInitializer = true;
		}
	    }
	}
    }

    public String getNativeName(){
	if ( myNativeName == null ){
	    if ( ci instanceof ArrayClassInfo ){
		ArrayClassInfo aci = (ArrayClassInfo)ci;
		if (aci.depth == 1) {
		    /*
		     * There are some special arrays of well-known basic
		     * types here.
		     */
		    if (aci.baseClass == null) {
			myNativeName = "manufacturedArrayOf"+
			    aci.baseName;
		    } else if (aci.baseClass.find().superClassInfo == null) {
			myNativeName = "manufacturedArrayOfObject";
		    } else {
		        myNativeName = "manufacturedArrayClass"+
			    aci.arrayClassNumber;
		    }
		} else {
		    myNativeName = "manufacturedArrayClass"+
			aci.arrayClassNumber;
		}
	    } else {
		myNativeName = ci.getGenericNativeName();
	    }
	}
	return myNativeName;
    }

    public int
    EVMflags(){
	int flagval = 0;
	int a = ci.access;
	if ( (a&ACC_PUBLIC) != 0 ) flagval |= EVM_CLASS_ACC_PUBLIC;
	if ( (a&ACC_FINAL) != 0 ) flagval |= EVM_CLASS_ACC_FINAL;
	if ( (a&ACC_SUPER) != 0 ) flagval |= EVM_CLASS_ACC_SUPER;
	if ( (a&ACC_INTERFACE) != 0 ) flagval |= EVM_CLASS_ACC_INTERFACE;
	if ( (a&ACC_ABSTRACT) != 0 ) flagval |= EVM_CLASS_ACC_ABSTRACT;
	return flagval;

    }

    public int
    typecode(){
	return typeCode;
    }

    public void orderStatics(){
	// count statics.
	// arranged them ref-first
	// do not assign offsets.
	FieldInfo f[] = ci.fields;
	nStaticWords = 0;
	if ( (f == null) || (f.length == 0 ) ) return; // nothing to do.
	int nFields = f.length;
	int nStatic = 0;
	int nRef = 0;
	for ( int i = 0; i < nFields; i++ ){
	    FieldInfo fld = f[i];
	    if ( fld.isStaticMember() ){
		nStatic += 1;
		char toptype =  fld.type.string.charAt(0);
		if ( (toptype == 'L') || (toptype=='['))
		    nRef += 1;
	    }
	}
	int refOff     = 0;
	int scalarOff = nRef;
	int totalStaticWords = nRef;
	statics = new FieldInfo[ nStatic ];
	for ( int i = 0; i < nFields; i++ ){
	    FieldInfo fld = f[i];
	    if ( fld.isStaticMember() ){
		char toptype =  fld.type.string.charAt(0);
		if ( (toptype == 'L') || (toptype=='[')){
		    statics[refOff] = fld;
		    refOff += 1;
		} else {
		    statics[scalarOff] = fld;
		    scalarOff += 1;
		    totalStaticWords += fld.nSlots;
		}
	    }
	}
	nStaticWords = totalStaticWords;
	nStaticRef   = nRef;
    }

}