package com.sun.org.apache.bcel.internal.verifier.structurals;
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" and
* "Apache BCEL" must not be used to endorse or promote products
* derived from this software without prior written permission. For
* written permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* "Apache BCEL", nor may "Apache" appear in their name, without
* prior written permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import com.sun.org.apache.bcel.internal.Constants;
import com.sun.org.apache.bcel.internal.Repository;
import com.sun.org.apache.bcel.internal.generic.*;
import com.sun.org.apache.bcel.internal.classfile.JavaClass;
import com.sun.org.apache.bcel.internal.classfile.Constant;
import com.sun.org.apache.bcel.internal.classfile.ConstantDouble;
import com.sun.org.apache.bcel.internal.classfile.ConstantFloat;
import com.sun.org.apache.bcel.internal.classfile.ConstantInteger;
import com.sun.org.apache.bcel.internal.classfile.ConstantLong;
import com.sun.org.apache.bcel.internal.classfile.ConstantString;
import com.sun.org.apache.bcel.internal.verifier.Verifier;
import com.sun.org.apache.bcel.internal.verifier.exc.*;
import java.util.ArrayList;
import java.util.Hashtable;
/**
* This Visitor class may be used for a type-based Java Virtual Machine
* simulation.
* It does not check for correct types on the OperandStack or in the
* LocalVariables; nor does it check their sizes are sufficiently big.
* Thus, to use this Visitor for bytecode verifying, you have to make sure
* externally that the type constraints of the Java Virtual Machine instructions
* are satisfied. An InstConstraintVisitor may be used for this.
* Anyway, this Visitor does not mandate it. For example, when you
* visitIADD(IADD o), then there are two stack slots popped and one
* stack slot containing a Type.INT is pushed (where you could also
* pop only one slot if you know there are two Type.INT on top of the
* stack). Monitor-specific behaviour is not simulated.
*
* </P><B>Conventions:</B>
*
* Type.VOID will never be pushed onto the stack. Type.DOUBLE and Type.LONG
* that would normally take up two stack slots (like Double_HIGH and
* Double_LOW) are represented by a simple single Type.DOUBLE or Type.LONG
* object on the stack here.
* If a two-slot type is stored into a local variable, the next variable
* is given the type Type.UNKNOWN.
*
* @version $Id: ExecutionVisitor.java,v 1.1.1.1 2001/10/29 20:00:39 jvanzyl Exp $
* @author <A HREF="http://www.inf.fu-berlin.de/~ehaase"/>Enver Haase</A>
* @see #visitDSTORE(DSTORE o)
* @see InstConstraintVisitor
*/
public class ExecutionVisitor extends EmptyVisitor implements Visitor{
/**
* The executionframe we're operating on.
*/
private Frame frame = null;
/**
* The ConstantPoolGen we're working with.
* @see #setConstantPoolGen(ConstantPoolGen)
*/
private ConstantPoolGen cpg = null;
/**
* Constructor. Constructs a new instance of this class.
*/
public ExecutionVisitor(){}
/**
* The OperandStack from the current Frame we're operating on.
* @see #setFrame(Frame)
*/
private OperandStack stack(){
return frame.getStack();
}
/**
* The LocalVariables from the current Frame we're operating on.
* @see #setFrame(Frame)
*/
private LocalVariables locals(){
return frame.getLocals();
}
/**
* Sets the ConstantPoolGen needed for symbolic execution.
*/
public void setConstantPoolGen(ConstantPoolGen cpg){
this.cpg = cpg;
}
/**
* The only method granting access to the single instance of
* the ExecutionVisitor class. Before actively using this
* instance, <B>SET THE ConstantPoolGen FIRST</B>.
* @see #setConstantPoolGen(ConstantPoolGen)
*/
public void setFrame(Frame f){
this.frame = f;
}
///** Symbolically executes the corresponding Java Virtual Machine instruction. */
//public void visitWIDE(WIDE o){
// The WIDE instruction is modelled as a flag
// of the embedded instructions in BCEL.
// Therefore BCEL checks for possible errors
// when parsing in the .class file: We don't
// have even the possibilty to care for WIDE
// here.
//}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitAALOAD(AALOAD o){
stack().pop(); // pop the index int
//System.out.print(stack().peek());
Type t = stack().pop(); // Pop Array type
if (t == Type.NULL){
stack().push(Type.NULL);
} // Do nothing stackwise --- a NullPointerException is thrown at Run-Time
else{
ArrayType at = (ArrayType) t;
stack().push(at.getElementType());
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitAASTORE(AASTORE o){
stack().pop();
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitACONST_NULL(ACONST_NULL o){
stack().push(Type.NULL);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitALOAD(ALOAD o){
stack().push(locals().get(o.getIndex()));
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitANEWARRAY(ANEWARRAY o){
stack().pop(); //count
stack().push( new ArrayType(o.getType(cpg), 1) );
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitARETURN(ARETURN o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitARRAYLENGTH(ARRAYLENGTH o){
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitASTORE(ASTORE o){
locals().set(o.getIndex(), stack().pop());
//System.err.println("TODO-DEBUG: set LV '"+o.getIndex()+"' to '"+locals().get(o.getIndex())+"'.");
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitATHROW(ATHROW o){
Type t = stack().pop();
stack().clear();
if (t.equals(Type.NULL))
stack().push(Type.getType("Ljava/lang/NullPointerException;"));
else
stack().push(t);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitBALOAD(BALOAD o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitBASTORE(BASTORE o){
stack().pop();
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitBIPUSH(BIPUSH o){
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitCALOAD(CALOAD o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitCASTORE(CASTORE o){
stack().pop();
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitCHECKCAST(CHECKCAST o){
// It's possibly wrong to do so, but SUN's
// ByteCode verifier seems to do (only) this, too.
// TODO: One could use a sophisticated analysis here to check
// if a type cannot possibly be cated to another and by
// so doing predict the ClassCastException at run-time.
stack().pop();
stack().push(o.getType(cpg));
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitD2F(D2F o){
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitD2I(D2I o){
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitD2L(D2L o){
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDADD(DADD o){
stack().pop();
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDALOAD(DALOAD o){
stack().pop();
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDASTORE(DASTORE o){
stack().pop();
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDCMPG(DCMPG o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDCMPL(DCMPL o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDCONST(DCONST o){
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDDIV(DDIV o){
stack().pop();
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDLOAD(DLOAD o){
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDMUL(DMUL o){
stack().pop();
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDNEG(DNEG o){
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDREM(DREM o){
stack().pop();
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDRETURN(DRETURN o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDSTORE(DSTORE o){
locals().set(o.getIndex(), stack().pop());
locals().set(o.getIndex()+1, Type.UNKNOWN);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDSUB(DSUB o){
stack().pop();
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDUP(DUP o){
Type t = stack().pop();
stack().push(t);
stack().push(t);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDUP_X1(DUP_X1 o){
Type w1 = stack().pop();
Type w2 = stack().pop();
stack().push(w1);
stack().push(w2);
stack().push(w1);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDUP_X2(DUP_X2 o){
Type w1 = stack().pop();
Type w2 = stack().pop();
if (w2.getSize() == 2){
stack().push(w1);
stack().push(w2);
stack().push(w1);
}
else{
Type w3 = stack().pop();
stack().push(w1);
stack().push(w3);
stack().push(w2);
stack().push(w1);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDUP2(DUP2 o){
Type t = stack().pop();
if (t.getSize() == 2){
stack().push(t);
stack().push(t);
}
else{ // t.getSize() is 1
Type u = stack().pop();
stack().push(u);
stack().push(t);
stack().push(u);
stack().push(t);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDUP2_X1(DUP2_X1 o){
Type t = stack().pop();
if (t.getSize() == 2){
Type u = stack().pop();
stack().push(t);
stack().push(u);
stack().push(t);
}
else{ //t.getSize() is1
Type u = stack().pop();
Type v = stack().pop();
stack().push(u);
stack().push(t);
stack().push(v);
stack().push(u);
stack().push(t);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitDUP2_X2(DUP2_X2 o){
Type t = stack().pop();
if (t.getSize() == 2){
Type u = stack().pop();
if (u.getSize() == 2){
stack().push(t);
stack().push(u);
stack().push(t);
}else{
Type v = stack().pop();
stack().push(t);
stack().push(v);
stack().push(u);
stack().push(t);
}
}
else{ //t.getSize() is 1
Type u = stack().pop();
Type v = stack().pop();
if (v.getSize() == 2){
stack().push(u);
stack().push(t);
stack().push(v);
stack().push(u);
stack().push(t);
}else{
Type w = stack().pop();
stack().push(u);
stack().push(t);
stack().push(w);
stack().push(v);
stack().push(u);
stack().push(t);
}
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitF2D(F2D o){
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitF2I(F2I o){
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitF2L(F2L o){
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFADD(FADD o){
stack().pop();
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFALOAD(FALOAD o){
stack().pop();
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFASTORE(FASTORE o){
stack().pop();
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFCMPG(FCMPG o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFCMPL(FCMPL o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFCONST(FCONST o){
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFDIV(FDIV o){
stack().pop();
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFLOAD(FLOAD o){
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFMUL(FMUL o){
stack().pop();
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFNEG(FNEG o){
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFREM(FREM o){
stack().pop();
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFRETURN(FRETURN o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFSTORE(FSTORE o){
locals().set(o.getIndex(), stack().pop());
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitFSUB(FSUB o){
stack().pop();
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitGETFIELD(GETFIELD o){
stack().pop();
Type t = o.getFieldType(cpg);
if ( t.equals(Type.BOOLEAN) ||
t.equals(Type.CHAR) ||
t.equals(Type.BYTE) ||
t.equals(Type.SHORT) )
t = Type.INT;
stack().push(t);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitGETSTATIC(GETSTATIC o){
Type t = o.getFieldType(cpg);
if ( t.equals(Type.BOOLEAN) ||
t.equals(Type.CHAR) ||
t.equals(Type.BYTE) ||
t.equals(Type.SHORT) )
t = Type.INT;
stack().push(t);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitGOTO(GOTO o){
// no stack changes.
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitGOTO_W(GOTO_W o){
// no stack changes.
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitI2B(I2B o){
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitI2C(I2C o){
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitI2D(I2D o){
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitI2F(I2F o){
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitI2L(I2L o){
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitI2S(I2S o){
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIADD(IADD o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIALOAD(IALOAD o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIAND(IAND o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIASTORE(IASTORE o){
stack().pop();
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitICONST(ICONST o){
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIDIV(IDIV o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIF_ACMPEQ(IF_ACMPEQ o){
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIF_ACMPNE(IF_ACMPNE o){
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIF_ICMPEQ(IF_ICMPEQ o){
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIF_ICMPGE(IF_ICMPGE o){
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIF_ICMPGT(IF_ICMPGT o){
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIF_ICMPLE(IF_ICMPLE o){
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIF_ICMPLT(IF_ICMPLT o){
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIF_ICMPNE(IF_ICMPNE o){
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIFEQ(IFEQ o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIFGE(IFGE o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIFGT(IFGT o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIFLE(IFLE o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIFLT(IFLT o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIFNE(IFNE o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIFNONNULL(IFNONNULL o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIFNULL(IFNULL o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIINC(IINC o){
// stack is not changed.
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitILOAD(ILOAD o){
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIMUL(IMUL o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitINEG(INEG o){
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitINSTANCEOF(INSTANCEOF o){
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitINVOKEINTERFACE(INVOKEINTERFACE o){
stack().pop(); //objectref
for (int i=0; i<o.getArgumentTypes(cpg).length; i++){
stack().pop();
}
// We are sure the invoked method will xRETURN eventually
// We simulate xRETURNs functionality here because we
// don't really "jump into" and simulate the invoked
// method.
if (o.getReturnType(cpg) != Type.VOID){
Type t = o.getReturnType(cpg);
if ( t.equals(Type.BOOLEAN) ||
t.equals(Type.CHAR) ||
t.equals(Type.BYTE) ||
t.equals(Type.SHORT) )
t = Type.INT;
stack().push(t);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitINVOKESPECIAL(INVOKESPECIAL o){
if (o.getMethodName(cpg).equals(Constants.CONSTRUCTOR_NAME)){
UninitializedObjectType t = (UninitializedObjectType) stack().peek(o.getArgumentTypes(cpg).length);
if (t == frame._this){
frame._this = null;
}
stack().initializeObject(t);
locals().initializeObject(t);
}
stack().pop(); //objectref
for (int i=0; i<o.getArgumentTypes(cpg).length; i++){
stack().pop();
}
// We are sure the invoked method will xRETURN eventually
// We simulate xRETURNs functionality here because we
// don't really "jump into" and simulate the invoked
// method.
if (o.getReturnType(cpg) != Type.VOID){
Type t = o.getReturnType(cpg);
if ( t.equals(Type.BOOLEAN) ||
t.equals(Type.CHAR) ||
t.equals(Type.BYTE) ||
t.equals(Type.SHORT) )
t = Type.INT;
stack().push(t);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitINVOKESTATIC(INVOKESTATIC o){
for (int i=0; i<o.getArgumentTypes(cpg).length; i++){
stack().pop();
}
// We are sure the invoked method will xRETURN eventually
// We simulate xRETURNs functionality here because we
// don't really "jump into" and simulate the invoked
// method.
if (o.getReturnType(cpg) != Type.VOID){
Type t = o.getReturnType(cpg);
if ( t.equals(Type.BOOLEAN) ||
t.equals(Type.CHAR) ||
t.equals(Type.BYTE) ||
t.equals(Type.SHORT) )
t = Type.INT;
stack().push(t);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitINVOKEVIRTUAL(INVOKEVIRTUAL o){
stack().pop(); //objectref
for (int i=0; i<o.getArgumentTypes(cpg).length; i++){
stack().pop();
}
// We are sure the invoked method will xRETURN eventually
// We simulate xRETURNs functionality here because we
// don't really "jump into" and simulate the invoked
// method.
if (o.getReturnType(cpg) != Type.VOID){
Type t = o.getReturnType(cpg);
if ( t.equals(Type.BOOLEAN) ||
t.equals(Type.CHAR) ||
t.equals(Type.BYTE) ||
t.equals(Type.SHORT) )
t = Type.INT;
stack().push(t);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIOR(IOR o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIREM(IREM o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIRETURN(IRETURN o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitISHL(ISHL o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitISHR(ISHR o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitISTORE(ISTORE o){
locals().set(o.getIndex(), stack().pop());
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitISUB(ISUB o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIUSHR(IUSHR o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitIXOR(IXOR o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitJSR(JSR o){
stack().push(new ReturnaddressType(o.physicalSuccessor()));
//System.err.println("TODO-----------:"+o.physicalSuccessor());
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitJSR_W(JSR_W o){
stack().push(new ReturnaddressType(o.physicalSuccessor()));
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitL2D(L2D o){
stack().pop();
stack().push(Type.DOUBLE);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitL2F(L2F o){
stack().pop();
stack().push(Type.FLOAT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitL2I(L2I o){
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLADD(LADD o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLALOAD(LALOAD o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLAND(LAND o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLASTORE(LASTORE o){
stack().pop();
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLCMP(LCMP o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLCONST(LCONST o){
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLDC(LDC o){
Constant c = cpg.getConstant(o.getIndex());
if (c instanceof ConstantInteger){
stack().push(Type.INT);
}
if (c instanceof ConstantFloat){
stack().push(Type.FLOAT);
}
if (c instanceof ConstantString){
stack().push(Type.STRING);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLDC_W(LDC_W o){
Constant c = cpg.getConstant(o.getIndex());
if (c instanceof ConstantInteger){
stack().push(Type.INT);
}
if (c instanceof ConstantFloat){
stack().push(Type.FLOAT);
}
if (c instanceof ConstantString){
stack().push(Type.STRING);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLDC2_W(LDC2_W o){
Constant c = cpg.getConstant(o.getIndex());
if (c instanceof ConstantLong){
stack().push(Type.LONG);
}
if (c instanceof ConstantDouble){
stack().push(Type.DOUBLE);
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLDIV(LDIV o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLLOAD(LLOAD o){
stack().push(locals().get(o.getIndex()));
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLMUL(LMUL o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLNEG(LNEG o){
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLOOKUPSWITCH(LOOKUPSWITCH o){
stack().pop(); //key
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLOR(LOR o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLREM(LREM o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLRETURN(LRETURN o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLSHL(LSHL o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLSHR(LSHR o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLSTORE(LSTORE o){
locals().set(o.getIndex(), stack().pop());
locals().set(o.getIndex()+1, Type.UNKNOWN);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLSUB(LSUB o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLUSHR(LUSHR o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitLXOR(LXOR o){
stack().pop();
stack().pop();
stack().push(Type.LONG);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitMONITORENTER(MONITORENTER o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitMONITOREXIT(MONITOREXIT o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitMULTIANEWARRAY(MULTIANEWARRAY o){
for (int i=0; i<o.getDimensions(); i++){
stack().pop();
}
stack().push(o.getType(cpg));
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitNEW(NEW o){
stack().push(new UninitializedObjectType((ObjectType) (o.getType(cpg))));
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitNEWARRAY(NEWARRAY o){
stack().pop();
stack().push(o.getType());
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitNOP(NOP o){
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitPOP(POP o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitPOP2(POP2 o){
Type t = stack().pop();
if (t.getSize() == 1){
stack().pop();
}
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitPUTFIELD(PUTFIELD o){
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitPUTSTATIC(PUTSTATIC o){
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitRET(RET o){
// do nothing, return address
// is in in the local variables.
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitRETURN(RETURN o){
// do nothing.
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitSALOAD(SALOAD o){
stack().pop();
stack().pop();
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitSASTORE(SASTORE o){
stack().pop();
stack().pop();
stack().pop();
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitSIPUSH(SIPUSH o){
stack().push(Type.INT);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitSWAP(SWAP o){
Type t = stack().pop();
Type u = stack().pop();
stack().push(t);
stack().push(u);
}
/** Symbolically executes the corresponding Java Virtual Machine instruction. */
public void visitTABLESWITCH(TABLESWITCH o){
stack().pop();
}
}
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