kopia lustrzana
https://github.com/eclipse-aspectj/aspectj.git
synced 2024-08-13 14:13:07 +02:00
2446 wiersze
86 KiB
Java
2446 wiersze
86 KiB
Java
package org.aspectj.apache.bcel.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 org.aspectj.apache.bcel.Constants;
|
||
import org.aspectj.apache.bcel.Repository;
|
||
import org.aspectj.apache.bcel.classfile.Constant;
|
||
import org.aspectj.apache.bcel.classfile.ConstantClass;
|
||
import org.aspectj.apache.bcel.classfile.ConstantDouble;
|
||
import org.aspectj.apache.bcel.classfile.ConstantInteger;
|
||
import org.aspectj.apache.bcel.classfile.ConstantFieldref;
|
||
import org.aspectj.apache.bcel.classfile.ConstantFloat;
|
||
import org.aspectj.apache.bcel.classfile.ConstantLong;
|
||
import org.aspectj.apache.bcel.classfile.ConstantString;
|
||
import org.aspectj.apache.bcel.classfile.ConstantPool;
|
||
import org.aspectj.apache.bcel.classfile.Field;
|
||
import org.aspectj.apache.bcel.classfile.JavaClass;
|
||
import org.aspectj.apache.bcel.verifier.EmptyInstVisitor;
|
||
import org.aspectj.apache.bcel.verifier.VerificationResult;
|
||
import org.aspectj.apache.bcel.verifier.Verifier;
|
||
import org.aspectj.apache.bcel.verifier.VerifierFactory;
|
||
import org.aspectj.apache.bcel.verifier.exc.*;
|
||
import org.aspectj.apache.bcel.generic.ArrayType;
|
||
import org.aspectj.apache.bcel.generic.FieldInstruction;
|
||
import org.aspectj.apache.bcel.generic.IINC;
|
||
import org.aspectj.apache.bcel.generic.INVOKEINTERFACE;
|
||
import org.aspectj.apache.bcel.generic.Instruction;
|
||
import org.aspectj.apache.bcel.generic.InstructionBranch;
|
||
import org.aspectj.apache.bcel.generic.InstructionLV;
|
||
import org.aspectj.apache.bcel.generic.InvokeInstruction;
|
||
import org.aspectj.apache.bcel.generic.LOOKUPSWITCH;
|
||
import org.aspectj.apache.bcel.generic.MULTIANEWARRAY;
|
||
import org.aspectj.apache.bcel.generic.MethodGen;
|
||
import org.aspectj.apache.bcel.generic.ObjectType;
|
||
import org.aspectj.apache.bcel.generic.RET;
|
||
import org.aspectj.apache.bcel.generic.ReferenceType;
|
||
import org.aspectj.apache.bcel.generic.ReturnaddressType;
|
||
import org.aspectj.apache.bcel.generic.TABLESWITCH;
|
||
import org.aspectj.apache.bcel.generic.Type;
|
||
|
||
|
||
/**
|
||
* A Visitor class testing for valid preconditions of JVM instructions.
|
||
* The instance of this class will throw a StructuralCodeConstraintException
|
||
* instance if an instruction is visitXXX()ed which has preconditions that are
|
||
* not satisfied.
|
||
* TODO: Currently, the JVM's behaviour concerning monitors (MONITORENTER,
|
||
* MONITOREXIT) is not modeled in JustIce.
|
||
*
|
||
* @version $Id: InstConstraintVisitor.java,v 1.3 2008/08/28 00:02:13 aclement Exp $
|
||
* @author <A HREF="http://www.inf.fu-berlin.de/~ehaase"/>Enver Haase</A>
|
||
* @see org.aspectj.apache.bcel.verifier.exc.StructuralCodeConstraintException
|
||
* @see org.aspectj.apache.bcel.verifier.exc.LinkingConstraintException
|
||
*/
|
||
public class InstConstraintVisitor extends EmptyInstVisitor {
|
||
|
||
private static ObjectType GENERIC_ARRAY = new ObjectType("org.aspectj.apache.bcel.verifier.structurals.GenericArray");
|
||
|
||
/**
|
||
* The constructor. Constructs a new instance of this class.
|
||
*/
|
||
public InstConstraintVisitor(){}
|
||
|
||
/**
|
||
* The Execution Frame we're working on.
|
||
*
|
||
* @see #setFrame(Frame f)
|
||
* @see #locals()
|
||
* @see #stack()
|
||
*/
|
||
private Frame frame = null;
|
||
|
||
private ConstantPool cpg = null;
|
||
|
||
/**
|
||
* The MethodGen we're working on.
|
||
*
|
||
* @see #setMethodGen(MethodGen mg)
|
||
*/
|
||
private MethodGen mg = null;
|
||
|
||
/**
|
||
* The OperandStack we're working on.
|
||
*
|
||
* @see #setFrame(Frame f)
|
||
*/
|
||
private OperandStack stack(){
|
||
return frame.getStack();
|
||
}
|
||
|
||
/**
|
||
* The LocalVariables we're working on.
|
||
*
|
||
* @see #setFrame(Frame f)
|
||
*/
|
||
private LocalVariables locals(){
|
||
return frame.getLocals();
|
||
}
|
||
|
||
/**
|
||
* This method is called by the visitXXX() to notify the acceptor of this InstConstraintVisitor
|
||
* that a constraint violation has occured. This is done by throwing an instance of a
|
||
* StructuralCodeConstraintException.
|
||
* @throws org.aspectj.apache.bcel.verifier.exc.StructuralCodeConstraintException always.
|
||
*/
|
||
private void constraintViolated(Instruction violator, String description){
|
||
String fq_classname = violator.getClass().getName();
|
||
throw new StructuralCodeConstraintException("Instruction "+ fq_classname.substring(fq_classname.lastIndexOf('.')+1) +" constraint violated: " + description);
|
||
}
|
||
|
||
/**
|
||
* This returns the single instance of the InstConstraintVisitor class.
|
||
* To operate correctly, other values must have been set before actually
|
||
* using the instance.
|
||
* Use this method for performance reasons.
|
||
*
|
||
* @see #setConstantPoolGen(ConstantPoolGen cpg)
|
||
* @see #setMethodGen(MethodGen mg)
|
||
*/
|
||
public void setFrame(Frame f){
|
||
this.frame = f;
|
||
//if (singleInstance.mg == null || singleInstance.cpg == null) throw new AssertionViolatedException("Forgot to set important values first.");
|
||
}
|
||
|
||
/**
|
||
* Sets the ConstantPoolGen instance needed for constraint
|
||
* checking prior to execution.
|
||
*/
|
||
public void setConstantPoolGen(ConstantPool cpg){
|
||
this.cpg = cpg;
|
||
}
|
||
|
||
/**
|
||
* Sets the MethodGen instance needed for constraint
|
||
* checking prior to execution.
|
||
*/
|
||
public void setMethodGen(MethodGen mg){
|
||
this.mg = mg;
|
||
}
|
||
|
||
/**
|
||
* Assures index is of type INT.
|
||
* @throws org.aspectj.apache.bcel.verifier.exc.StructuralCodeConstraintException if the above constraint is not satisfied.
|
||
*/
|
||
private void indexOfInt(Instruction o, Type index){
|
||
if (! index.equals(Type.INT))
|
||
constraintViolated(o, "The 'index' is not of type int but of type "+index+".");
|
||
}
|
||
|
||
/**
|
||
* Assures the ReferenceType r is initialized (or Type.NULL).
|
||
* Formally, this means (!(r instanceof UninitializedObjectType)), because
|
||
* there are no uninitialized array types.
|
||
* @throws org.aspectj.apache.bcel.verifier.exc.StructuralCodeConstraintException if the above constraint is not satisfied.
|
||
*/
|
||
private void referenceTypeIsInitialized(Instruction o, ReferenceType r){
|
||
if (r instanceof UninitializedObjectType){
|
||
constraintViolated(o, "Working on an uninitialized object '"+r+"'.");
|
||
}
|
||
}
|
||
|
||
/** Assures value is of type INT. */
|
||
private void valueOfInt(Instruction o, Type value){
|
||
if (! value.equals(Type.INT))
|
||
constraintViolated(o, "The 'value' is not of type int but of type "+value+".");
|
||
}
|
||
|
||
/**
|
||
* Assures arrayref is of ArrayType or NULL;
|
||
* returns true if and only if arrayref is non-NULL.
|
||
* @throws org.aspectj.apache.bcel.verifier.exc.StructuralCodeConstraintException if the above constraint is violated.
|
||
*/
|
||
private boolean arrayrefOfArrayType(Instruction o, Type arrayref){
|
||
if (! ((arrayref instanceof ArrayType) || arrayref.equals(Type.NULL)) )
|
||
constraintViolated(o, "The 'arrayref' does not refer to an array but is of type "+arrayref+".");
|
||
return (arrayref instanceof ArrayType);
|
||
}
|
||
|
||
/***************************************************************/
|
||
/* MISC */
|
||
/***************************************************************/
|
||
/**
|
||
* Ensures the general preconditions of an instruction that accesses the stack.
|
||
* This method is here because BCEL has no such superinterface for the stack
|
||
* accessing instructions; and there are funny unexpected exceptions in the
|
||
* semantices of the superinterfaces and superclasses provided.
|
||
* E.g. SWAP is a StackConsumer, but DUP_X1 is not a StackProducer.
|
||
* Therefore, this method is called by all StackProducer, StackConsumer,
|
||
* and StackInstruction instances via their visitXXX() method.
|
||
* Unfortunately, as the superclasses and superinterfaces overlap, some instructions
|
||
* cause this method to be called two or three times. [TODO: Fix this.]
|
||
*
|
||
* @see #visitStackConsumer(StackConsumer o)
|
||
* @see #visitStackProducer(StackProducer o)
|
||
* @see #visitStackInstruction(StackInstruction o)
|
||
*/
|
||
private void _visitStackAccessor(Instruction o){
|
||
int consume = o.consumeStack(cpg); // Stack values are always consumed first; then produced.
|
||
if (consume > stack().slotsUsed()){
|
||
constraintViolated((Instruction) o, "Cannot consume "+consume+" stack slots: only "+stack().slotsUsed()+" slot(s) left on stack!\nStack:\n"+stack());
|
||
}
|
||
|
||
int produce = o.produceStack(cpg) - ((Instruction) o).consumeStack(cpg); // Stack values are always consumed first; then produced.
|
||
if ( produce + stack().slotsUsed() > stack().maxStack() ){
|
||
constraintViolated((Instruction) o, "Cannot produce "+produce+" stack slots: only "+(stack().maxStack()-stack().slotsUsed())+" free stack slot(s) left.\nStack:\n"+stack());
|
||
}
|
||
}
|
||
|
||
/***************************************************************/
|
||
/* "generic"visitXXXX methods where XXXX is an interface */
|
||
/* therefore, we don't know the order of visiting; but we know */
|
||
/* these methods are called before the visitYYYY methods below */
|
||
/***************************************************************/
|
||
|
||
/**
|
||
* Assures the generic preconditions of a LoadClass instance.
|
||
* The referenced class is loaded and pass2-verified.
|
||
*/
|
||
public void visitLoadClass(Instruction o){
|
||
ObjectType t = o.getLoadClassType(cpg);
|
||
if (t != null){// null means "no class is loaded"
|
||
Verifier v = VerifierFactory.getVerifier(t.getClassName());
|
||
VerificationResult vr = v.doPass2();
|
||
if (vr.getStatus() != VerificationResult.VERIFIED_OK){
|
||
constraintViolated((Instruction) o, "Class '"+o.getLoadClassType(cpg).getClassName()+"' is referenced, but cannot be loaded and resolved: '"+vr+"'.");
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the general preconditions of a StackConsumer instance.
|
||
*/
|
||
public void visitStackConsumer(Instruction o){
|
||
_visitStackAccessor(o);
|
||
}
|
||
|
||
/**
|
||
* Ensures the general preconditions of a StackProducer instance.
|
||
*/
|
||
public void visitStackProducer(Instruction o){
|
||
_visitStackAccessor(o);
|
||
}
|
||
|
||
|
||
/***************************************************************/
|
||
/* "generic" visitYYYY methods where YYYY is a superclass. */
|
||
/* therefore, we know the order of visiting; we know */
|
||
/* these methods are called after the visitXXXX methods above. */
|
||
/***************************************************************/
|
||
public void visitCPInstruction(Instruction o){
|
||
int idx = o.getIndex();
|
||
if ((idx < 0) || (idx >= cpg.getSize())){
|
||
throw new AssertionViolatedException("Huh?! Constant pool index of instruction '"+o+"' illegal? Pass 3a should have checked this!");
|
||
}
|
||
}
|
||
|
||
public void visitFieldInstruction(Instruction o){
|
||
// visitLoadClass(o) has been called before: Every FieldOrMethod
|
||
// implements LoadClass.
|
||
// visitCPInstruction(o) has been called before.
|
||
// A FieldInstruction may be: GETFIELD, GETSTATIC, PUTFIELD, PUTSTATIC
|
||
Constant c = cpg.getConstant(o.getIndex());
|
||
if (!(c instanceof ConstantFieldref)){
|
||
constraintViolated(o, "Index '"+o.getIndex()+"' should refer to a CONSTANT_Fieldref_info structure, but refers to '"+c+"'.");
|
||
}
|
||
// the o.getClassType(cpg) type has passed pass 2; see visitLoadClass(o).
|
||
Type t = o.getType(cpg);
|
||
if (t instanceof ObjectType){
|
||
String name = ((ObjectType)t).getClassName();
|
||
Verifier v = VerifierFactory.getVerifier( name );
|
||
VerificationResult vr = v.doPass2();
|
||
if (vr.getStatus() != VerificationResult.VERIFIED_OK){
|
||
constraintViolated((Instruction) o, "Class '"+name+"' is referenced, but cannot be loaded and resolved: '"+vr+"'.");
|
||
}
|
||
}
|
||
}
|
||
|
||
public void visitInvokeInstruction(InvokeInstruction o){
|
||
// visitLoadClass(o) has been called before: Every FieldOrMethod
|
||
// implements LoadClass.
|
||
// visitCPInstruction(o) has been called before.
|
||
//TODO
|
||
}
|
||
|
||
public void visitStackInstruction(Instruction o){
|
||
_visitStackAccessor(o);
|
||
}
|
||
|
||
/**
|
||
* Assures the generic preconditions of a LocalVariableInstruction instance.
|
||
* That is, the index of the local variable must be valid.
|
||
*/
|
||
public void visitLocalVariableInstruction(InstructionLV o){
|
||
if (locals().maxLocals() <= (o.getType(cpg).getSize()==1? o.getIndex() : o.getIndex()+1) ){
|
||
constraintViolated(o, "The 'index' is not a valid index into the local variable array.");
|
||
}
|
||
}
|
||
|
||
public void visitLoadInstruction(Instruction o){
|
||
//visitLocalVariableInstruction(o) is called before, because it is more generic.
|
||
|
||
// LOAD instructions must not read Type.UNKNOWN
|
||
if (locals().get(o.getIndex()) == Type.UNKNOWN){
|
||
constraintViolated(o, "Read-Access on local variable "+o.getIndex()+" with unknown content.");
|
||
}
|
||
|
||
// LOAD instructions, two-slot-values at index N must have Type.UNKNOWN
|
||
// as a symbol for the higher halve at index N+1
|
||
// [suppose some instruction put an int at N+1--- our double at N is defective]
|
||
if (o.getType(cpg).getSize() == 2){
|
||
if (locals().get(o.getIndex()+1) != Type.UNKNOWN){
|
||
constraintViolated(o, "Reading a two-locals value from local variables "+o.getIndex()+" and "+(o.getIndex()+1)+" where the latter one is destroyed.");
|
||
}
|
||
}
|
||
|
||
// LOAD instructions must read the correct type.
|
||
if (!o.isALOAD()){
|
||
if (locals().get(o.getIndex()) != o.getType(cpg) ){
|
||
constraintViolated(o, "Local Variable type and LOADing Instruction type mismatch: Local Variable: '"+locals().get(o.getIndex())+"'; Instruction type: '"+o.getType(cpg)+"'.");
|
||
}
|
||
}
|
||
else{ // we deal with an ALOAD
|
||
if (!(locals().get(o.getIndex()) instanceof ReferenceType)){
|
||
constraintViolated(o, "Local Variable type and LOADing Instruction type mismatch: Local Variable: '"+locals().get(o.getIndex())+"'; Instruction expects a ReferenceType.");
|
||
}
|
||
// ALOAD __IS ALLOWED__ to put uninitialized objects onto the stack!
|
||
//referenceTypeIsInitialized(o, (ReferenceType) (locals().get(o.getIndex())));
|
||
}
|
||
|
||
// LOAD instructions must have enough free stack slots.
|
||
if ((stack().maxStack() - stack().slotsUsed()) < o.getType(cpg).getSize()){
|
||
constraintViolated(o, "Not enough free stack slots to load a '"+o.getType(cpg)+"' onto the OperandStack.");
|
||
}
|
||
}
|
||
|
||
public void visitStoreInstruction(Instruction o){
|
||
//visitLocalVariableInstruction(o) is called before, because it is more generic.
|
||
|
||
if (stack().isEmpty()){ // Don't bother about 1 or 2 stack slots used. This check is implicitely done below while type checking.
|
||
constraintViolated(o, "Cannot STORE: Stack to read from is empty.");
|
||
}
|
||
|
||
if (!o.isASTORE() ){
|
||
if (! (stack().peek() == o.getType(cpg)) ){// the other xSTORE types are singletons in BCEL.
|
||
constraintViolated(o, "Stack top type and STOREing Instruction type mismatch: Stack top: '"+stack().peek()+"'; Instruction type: '"+o.getType(cpg)+"'.");
|
||
}
|
||
}
|
||
else{ // we deal with ASTORE
|
||
Type stacktop = stack().peek();
|
||
if ( (!(stacktop instanceof ReferenceType)) && (!(stacktop instanceof ReturnaddressType)) ){
|
||
constraintViolated(o, "Stack top type and STOREing Instruction type mismatch: Stack top: '"+stack().peek()+"'; Instruction expects a ReferenceType or a ReturnadressType.");
|
||
}
|
||
if (stacktop instanceof ReferenceType){
|
||
referenceTypeIsInitialized(o, (ReferenceType) stacktop);
|
||
}
|
||
}
|
||
}
|
||
|
||
public void visitReturnInstruction(Instruction o){
|
||
if (o.getOpcode()==Constants.RETURN){
|
||
return;
|
||
}
|
||
if (o.getOpcode()==Constants.ARETURN){
|
||
if (stack().peek() == Type.NULL){
|
||
return;
|
||
}
|
||
else{
|
||
if (! (stack().peek() instanceof ReferenceType)){
|
||
constraintViolated(o, "Reference type expected on top of stack, but is: '"+stack().peek()+"'.");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek()));
|
||
//ReferenceType objectref = (ReferenceType) (stack().peek());
|
||
// TODO: This can only be checked if using Staerk-et-al's "set of object types" instead of a
|
||
// "wider cast object type" created during verification.
|
||
//if (! (objectref.isAssignmentCompatibleWith(mg.getType())) ){
|
||
// constraintViolated(o, "Type on stack top which should be returned is a '"+stack().peek()+"' which is not assignment compatible with the return type of this method, '"+mg.getType()+"'.");
|
||
//}
|
||
}
|
||
}
|
||
else{
|
||
Type method_type = mg.getType();
|
||
if (method_type == Type.BOOLEAN ||
|
||
method_type == Type.BYTE ||
|
||
method_type == Type.SHORT ||
|
||
method_type == Type.CHAR){
|
||
method_type = Type.INT;
|
||
}
|
||
if (! ( method_type.equals( stack().peek() ))){
|
||
constraintViolated(o, "Current method has return type of '"+mg.getType()+"' expecting a '"+method_type+"' on top of the stack. But stack top is a '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
}
|
||
|
||
/***************************************************************/
|
||
/* "special"visitXXXX methods for one type of instruction each */
|
||
/***************************************************************/
|
||
|
||
public void visitAALOAD(Instruction o){
|
||
Type arrayref = stack().peek(1);
|
||
Type index = stack().peek(0);
|
||
|
||
indexOfInt(o, index);
|
||
if (arrayrefOfArrayType(o, arrayref)){
|
||
if (! (((ArrayType) arrayref).getElementType() instanceof ReferenceType)){
|
||
constraintViolated(o, "The 'arrayref' does not refer to an array with elements of a ReferenceType but to an array of "+((ArrayType) arrayref).getElementType()+".");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) (((ArrayType) arrayref).getElementType()));
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitAASTORE(Instruction o){
|
||
Type arrayref = stack().peek(2);
|
||
Type index = stack().peek(1);
|
||
Type value = stack().peek(0);
|
||
|
||
indexOfInt(o, index);
|
||
if (!(value instanceof ReferenceType)){
|
||
constraintViolated(o, "The 'value' is not of a ReferenceType but of type "+value+".");
|
||
}else{
|
||
referenceTypeIsInitialized(o, (ReferenceType) value);
|
||
}
|
||
// Don't bother further with "referenceTypeIsInitialized()", there are no arrays
|
||
// of an uninitialized object type.
|
||
if (arrayrefOfArrayType(o, arrayref)){
|
||
if (! (((ArrayType) arrayref).getElementType() instanceof ReferenceType)){
|
||
constraintViolated(o, "The 'arrayref' does not refer to an array with elements of a ReferenceType but to an array of "+((ArrayType) arrayref).getElementType()+".");
|
||
}
|
||
if (! ((ReferenceType)value).isAssignmentCompatibleWith((ReferenceType) ((ArrayType) arrayref).getElementType())){
|
||
constraintViolated(o, "The type of 'value' ('"+value+"') is not assignment compatible to the components of the array 'arrayref' refers to. ('"+((ArrayType) arrayref).getElementType()+"')");
|
||
}
|
||
}
|
||
}
|
||
|
||
public void visitACONST_NULL(Instruction o){
|
||
// Nothing needs to be done here.
|
||
}
|
||
|
||
public void visitALOAD(Instruction o){
|
||
//visitLoadInstruction(LoadInstruction) is called before.
|
||
// Nothing else needs to be done here.
|
||
}
|
||
|
||
public void visitANEWARRAY(Instruction o){
|
||
if (!stack().peek().equals(Type.INT))
|
||
constraintViolated(o, "The 'count' at the stack top is not of type '"+Type.INT+"' but of type '"+stack().peek()+"'.");
|
||
// The runtime constant pool item at that index must be a symbolic reference to a class,
|
||
// array, or interface type. See Pass 3a.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitARETURN(Instruction o){
|
||
if (! (stack().peek() instanceof ReferenceType) ){
|
||
constraintViolated(o, "The 'objectref' at the stack top is not of a ReferenceType but of type '"+stack().peek()+"'.");
|
||
}
|
||
ReferenceType objectref = (ReferenceType) (stack().peek());
|
||
referenceTypeIsInitialized(o, objectref);
|
||
|
||
// The check below should already done via visitReturnInstruction(ReturnInstruction), see there.
|
||
// It cannot be done using Staerk-et-al's "set of object types" instead of a
|
||
// "wider cast object type", anyway.
|
||
//if (! objectref.isAssignmentCompatibleWith(mg.getReturnType() )){
|
||
// constraintViolated(o, "The 'objectref' type "+objectref+" at the stack top is not assignment compatible with the return type '"+mg.getReturnType()+"' of the method.");
|
||
//}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitARRAYLENGTH(Instruction o){
|
||
Type arrayref = stack().peek(0);
|
||
arrayrefOfArrayType(o, arrayref);
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitASTORE(Instruction o){
|
||
if (! ( (stack().peek() instanceof ReferenceType) || (stack().peek() instanceof ReturnaddressType) ) ){
|
||
constraintViolated(o, "The 'objectref' is not of a ReferenceType or of ReturnaddressType but of "+stack().peek()+".");
|
||
}
|
||
if (stack().peek() instanceof ReferenceType){
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek()) );
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitATHROW(Instruction o){
|
||
// It's stated that 'objectref' must be of a ReferenceType --- but since Throwable is
|
||
// not derived from an ArrayType, it follows that 'objectref' must be of an ObjectType or Type.NULL.
|
||
if (! ((stack().peek() instanceof ObjectType) || (stack().peek().equals(Type.NULL))) ){
|
||
constraintViolated(o, "The 'objectref' is not of an (initialized) ObjectType but of type "+stack().peek()+".");
|
||
}
|
||
|
||
// NULL is a subclass of every class, so to speak.
|
||
if (stack().peek().equals(Type.NULL)) return;
|
||
|
||
ObjectType exc = (ObjectType) (stack().peek());
|
||
ObjectType throwable = (ObjectType) (Type.getType("Ljava/lang/Throwable;"));
|
||
if ( (! (exc.subclassOf(throwable)) ) && (! (exc.equals(throwable))) ){
|
||
constraintViolated(o, "The 'objectref' is not of class Throwable or of a subclass of Throwable, but of '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitBALOAD(Instruction o){
|
||
Type arrayref = stack().peek(1);
|
||
Type index = stack().peek(0);
|
||
indexOfInt(o, index);
|
||
if (arrayrefOfArrayType(o, arrayref)){
|
||
if (! ( (((ArrayType) arrayref).getElementType().equals(Type.BOOLEAN)) ||
|
||
(((ArrayType) arrayref).getElementType().equals(Type.BYTE)) ) ){
|
||
constraintViolated(o, "The 'arrayref' does not refer to an array with elements of a Type.BYTE or Type.BOOLEAN but to an array of '"+((ArrayType) arrayref).getElementType()+"'.");
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitBASTORE(Instruction o){
|
||
Type arrayref = stack().peek(2);
|
||
Type index = stack().peek(1);
|
||
Type value = stack().peek(0);
|
||
|
||
indexOfInt(o, index);
|
||
valueOfInt(o, value);
|
||
if (arrayrefOfArrayType(o, arrayref)){
|
||
if (! ( (((ArrayType) arrayref).getElementType().equals(Type.BOOLEAN)) ||
|
||
(((ArrayType) arrayref).getElementType().equals(Type.BYTE)) ) )
|
||
constraintViolated(o, "The 'arrayref' does not refer to an array with elements of a Type.BYTE or Type.BOOLEAN but to an array of '"+((ArrayType) arrayref).getElementType()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitBIPUSH(Instruction o){
|
||
// Nothing to do...
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitBREAKPOINT(Instruction o){
|
||
throw new AssertionViolatedException("In this JustIce verification pass there should not occur an illegal instruction such as BREAKPOINT.");
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitCALOAD(Instruction o){
|
||
Type arrayref = stack().peek(1);
|
||
Type index = stack().peek(0);
|
||
|
||
indexOfInt(o, index);
|
||
arrayrefOfArrayType(o, arrayref);
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitCASTORE(Instruction o){
|
||
Type arrayref = stack().peek(2);
|
||
Type index = stack().peek(1);
|
||
Type value = stack().peek(0);
|
||
|
||
indexOfInt(o, index);
|
||
valueOfInt(o, value);
|
||
if (arrayrefOfArrayType(o, arrayref)){
|
||
if (! ((ArrayType) arrayref).getElementType().equals(Type.CHAR) ){
|
||
constraintViolated(o, "The 'arrayref' does not refer to an array with elements of type char but to an array of type "+((ArrayType) arrayref).getElementType()+".");
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitCHECKCAST(Instruction o){
|
||
// The objectref must be of type reference.
|
||
Type objectref = stack().peek(0);
|
||
if (!(objectref instanceof ReferenceType)){
|
||
constraintViolated(o, "The 'objectref' is not of a ReferenceType but of type "+objectref+".");
|
||
}
|
||
else{
|
||
referenceTypeIsInitialized(o, (ReferenceType) objectref);
|
||
}
|
||
// The unsigned indexbyte1 and indexbyte2 are used to construct an index into the runtime constant pool of the
|
||
// current class (<28>3.6), where the value of the index is (indexbyte1 << 8) | indexbyte2. The runtime constant
|
||
// pool item at the index must be a symbolic reference to a class, array, or interface type.
|
||
Constant c = cpg.getConstant(o.getIndex());
|
||
if (! (c instanceof ConstantClass)){
|
||
constraintViolated(o, "The Constant at 'index' is not a ConstantClass, but '"+c+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitD2F(Instruction o) { checkTop(o,Type.DOUBLE); }
|
||
public void visitD2I(Instruction o) { checkTop(o,Type.DOUBLE); }
|
||
public void visitD2L(Instruction o) { checkTop(o,Type.DOUBLE); }
|
||
|
||
public void visitDADD(Instruction o){
|
||
checkTop(o,Type.DOUBLE);
|
||
if (stack().peek(1) != Type.DOUBLE){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'double', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitDALOAD(Instruction o){
|
||
indexOfInt(o, stack().peek());
|
||
if (stack().peek(1) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(1) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-top must be of type double[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(1))).getBasicType();
|
||
if (t != Type.DOUBLE){
|
||
constraintViolated(o, "Stack next-to-top must be of type double[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitDASTORE(Instruction o){
|
||
if (stack().peek() != Type.DOUBLE){
|
||
constraintViolated(o, "The value at the stack top is not of type 'double', but of type '"+stack().peek()+"'.");
|
||
}
|
||
indexOfInt(o, stack().peek(1));
|
||
if (stack().peek(2) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(2) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type double[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(2))).getBasicType();
|
||
if (t != Type.DOUBLE){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type double[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitDCMPG(Instruction o){
|
||
checkTop(o,Type.DOUBLE);
|
||
if (stack().peek(1) != Type.DOUBLE){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'double', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitDCMPL(Instruction o){
|
||
checkTop(o,Type.DOUBLE);
|
||
if (stack().peek(1) != Type.DOUBLE){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'double', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitDCONST(Instruction o){
|
||
// There's nothing to be done here.
|
||
}
|
||
|
||
public void visitDDIV(Instruction o){
|
||
checkTop(o,Type.DOUBLE);
|
||
if (stack().peek(1) != Type.DOUBLE){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'double', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitDLOAD(Instruction o){
|
||
//visitLoadInstruction(LoadInstruction) is called before.
|
||
|
||
// Nothing else needs to be done here.
|
||
}
|
||
|
||
public void visitDMUL(Instruction o){
|
||
checkTop(o,Type.DOUBLE);
|
||
if (stack().peek(1) != Type.DOUBLE){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'double', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitDNEG(Instruction o){
|
||
checkTop(o,Type.DOUBLE);
|
||
}
|
||
|
||
public void visitDREM(Instruction o){
|
||
checkTop(o,Type.DOUBLE);
|
||
if (stack().peek(1) != Type.DOUBLE){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'double', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
private void checkTop(Instruction o,Type t) {
|
||
if (stack().peek()!=t)
|
||
constraintViolated(o, "The value at the stack top is not of type '"+t+"', but of type '"+stack().peek()+"'.");
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitDRETURN(Instruction o){
|
||
checkTop(o,Type.DOUBLE);
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitDSTORE(Instruction o){
|
||
//visitStoreInstruction(StoreInstruction) is called before.
|
||
|
||
// Nothing else needs to be done here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitDSUB(Instruction o){
|
||
if (stack().peek() != Type.DOUBLE){
|
||
constraintViolated(o, "The value at the stack top is not of type 'double', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.DOUBLE){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'double', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitDUP(Instruction o){
|
||
if (stack().peek().getSize() != 1){
|
||
constraintViolated(o, "Won't DUP type on stack top '"+stack().peek()+"' because it must occupy exactly one slot, not '"+stack().peek().getSize()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitDUP_X1(Instruction o){
|
||
if (stack().peek().getSize() != 1){
|
||
constraintViolated(o, "Type on stack top '"+stack().peek()+"' should occupy exactly one slot, not '"+stack().peek().getSize()+"'.");
|
||
}
|
||
if (stack().peek(1).getSize() != 1){
|
||
constraintViolated(o, "Type on stack next-to-top '"+stack().peek(1)+"' should occupy exactly one slot, not '"+stack().peek(1).getSize()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitDUP_X2(Instruction o){
|
||
if (stack().peek().getSize() != 1){
|
||
constraintViolated(o, "Stack top type must be of size 1, but is '"+stack().peek()+"' of size '"+stack().peek().getSize()+"'.");
|
||
}
|
||
if (stack().peek(1).getSize() == 2){
|
||
return; // Form 2, okay.
|
||
}
|
||
else{ //stack().peek(1).getSize == 1.
|
||
if (stack().peek(2).getSize() != 1){
|
||
constraintViolated(o, "If stack top's size is 1 and stack next-to-top's size is 1, stack next-to-next-to-top's size must also be 1, but is: '"+stack().peek(2)+"' of size '"+stack().peek(2).getSize()+"'.");
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitDUP2(Instruction o){
|
||
if (stack().peek().getSize() == 2){
|
||
return; // Form 2, okay.
|
||
}
|
||
else{ //stack().peek().getSize() == 1.
|
||
if (stack().peek(1).getSize() != 1){
|
||
constraintViolated(o, "If stack top's size is 1, then stack next-to-top's size must also be 1. But it is '"+stack().peek(1)+"' of size '"+stack().peek(1).getSize()+"'.");
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitDUP2_X1(Instruction o){
|
||
if (stack().peek().getSize() == 2){
|
||
if (stack().peek(1).getSize() != 1){
|
||
constraintViolated(o, "If stack top's size is 2, then stack next-to-top's size must be 1. But it is '"+stack().peek(1)+"' of size '"+stack().peek(1).getSize()+"'.");
|
||
}
|
||
else{
|
||
return; // Form 2
|
||
}
|
||
}
|
||
else{ // stack top is of size 1
|
||
if ( stack().peek(1).getSize() != 1 ){
|
||
constraintViolated(o, "If stack top's size is 1, then stack next-to-top's size must also be 1. But it is '"+stack().peek(1)+"' of size '"+stack().peek(1).getSize()+"'.");
|
||
}
|
||
if ( stack().peek(2).getSize() != 1 ){
|
||
constraintViolated(o, "If stack top's size is 1, then stack next-to-next-to-top's size must also be 1. But it is '"+stack().peek(2)+"' of size '"+stack().peek(2).getSize()+"'.");
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitDUP2_X2(Instruction o){
|
||
|
||
if (stack().peek(0).getSize() == 2){
|
||
if (stack().peek(1).getSize() == 2){
|
||
return; // Form 4
|
||
}
|
||
else{// stack top size is 2, next-to-top's size is 1
|
||
if ( stack().peek(2).getSize() != 1 ){
|
||
constraintViolated(o, "If stack top's size is 2 and stack-next-to-top's size is 1, then stack next-to-next-to-top's size must also be 1. But it is '"+stack().peek(2)+"' of size '"+stack().peek(2).getSize()+"'.");
|
||
}
|
||
else{
|
||
return; // Form 2
|
||
}
|
||
}
|
||
}
|
||
else{// stack top is of size 1
|
||
if (stack().peek(1).getSize() == 1){
|
||
if ( stack().peek(2).getSize() == 2 ){
|
||
return; // Form 3
|
||
}
|
||
else{
|
||
if ( stack().peek(3).getSize() == 1){
|
||
return; // Form 1
|
||
}
|
||
}
|
||
}
|
||
}
|
||
constraintViolated(o, "The operand sizes on the stack do not match any of the four forms of usage of this instruction.");
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitF2D(Instruction o){
|
||
if (stack().peek() != Type.FLOAT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'float', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitF2I(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
}
|
||
|
||
public void visitF2L(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFADD(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
if (stack().peek(1) != Type.FLOAT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'float', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFALOAD(Instruction o){
|
||
indexOfInt(o, stack().peek());
|
||
if (stack().peek(1) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(1) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-top must be of type float[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(1))).getBasicType();
|
||
if (t != Type.FLOAT){
|
||
constraintViolated(o, "Stack next-to-top must be of type float[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFASTORE(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
indexOfInt(o, stack().peek(1));
|
||
if (stack().peek(2) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(2) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type float[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(2))).getBasicType();
|
||
if (t != Type.FLOAT){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type float[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFCMPG(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
if (stack().peek(1) != Type.FLOAT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'float', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFCMPL(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
if (stack().peek(1) != Type.FLOAT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'float', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFCONST(Instruction o){
|
||
// nothing to do here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFDIV(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
if (stack().peek(1) != Type.FLOAT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'float', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFLOAD(Instruction o){
|
||
//visitLoadInstruction(LoadInstruction) is called before.
|
||
|
||
// Nothing else needs to be done here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFMUL(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
if (stack().peek(1) != Type.FLOAT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'float', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFNEG(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFREM(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
if (stack().peek(1) != Type.FLOAT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'float', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFRETURN(Instruction o){
|
||
checkTop(o,Type.FLOAT);
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFSTORE(Instruction o){
|
||
//visitStoreInstruction(StoreInstruction) is called before.
|
||
|
||
// Nothing else needs to be done here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitFSUB(Instruction o){
|
||
if (stack().peek() != Type.FLOAT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'float', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.FLOAT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'float', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitGETFIELD(FieldInstruction o){
|
||
Type objectref = stack().peek();
|
||
if (! ( (objectref instanceof ObjectType) || (objectref == Type.NULL) ) ){
|
||
constraintViolated(o, "Stack top should be an object reference that's not an array reference, but is '"+objectref+"'.");
|
||
}
|
||
|
||
String field_name = o.getFieldName(cpg);
|
||
|
||
JavaClass jc = Repository.lookupClass(o.getClassType(cpg).getClassName());
|
||
Field[] fields = jc.getFields();
|
||
Field f = null;
|
||
for (int i=0; i<fields.length; i++){
|
||
if (fields[i].getName().equals(field_name)){
|
||
f = fields[i];
|
||
break;
|
||
}
|
||
}
|
||
if (f == null){
|
||
throw new AssertionViolatedException("Field not found?!?");
|
||
}
|
||
|
||
if (f.isProtected()){
|
||
ObjectType classtype = o.getClassType(cpg);
|
||
ObjectType curr = new ObjectType(mg.getClassName());
|
||
|
||
if ( classtype.equals(curr) ||
|
||
curr.subclassOf(classtype) ){
|
||
Type t = stack().peek();
|
||
if (t == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (t instanceof ObjectType) ){
|
||
constraintViolated(o, "The 'objectref' must refer to an object that's not an array. Found instead: '"+t+"'.");
|
||
}
|
||
ObjectType objreftype = (ObjectType) t;
|
||
if (! ( objreftype.equals(curr) ||
|
||
objreftype.subclassOf(curr) ) ){
|
||
//TODO: One day move to Staerk-et-al's "Set of object types" instead of "wider" object types
|
||
// created during the verification.
|
||
// "Wider" object types don't allow us to check for things like that below.
|
||
//constraintViolated(o, "The referenced field has the ACC_PROTECTED modifier, and it's a member of the current class or a superclass of the current class. However, the referenced object type '"+stack().peek()+"' is not the current class or a subclass of the current class.");
|
||
}
|
||
}
|
||
}
|
||
|
||
// TODO: Could go into Pass 3a.
|
||
if (f.isStatic()){
|
||
constraintViolated(o, "Referenced field '"+f+"' is static which it shouldn't be.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitGETSTATIC(FieldInstruction o){
|
||
// Field must be static: see Pass 3a.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitGOTO(Instruction o){
|
||
// nothing to do here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitGOTO_W(Instruction o){
|
||
// nothing to do here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitI2B(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitI2C(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitI2D(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitI2F(Instruction o) { checkTop(o,Type.INT); }
|
||
public void visitI2L(Instruction o) { checkTop(o,Type.INT); }
|
||
public void visitI2S(Instruction o) { checkTop(o,Type.INT); }
|
||
|
||
public void visitIADD(Instruction o){
|
||
checkTop(o,Type.INT);
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIALOAD(Instruction o){
|
||
indexOfInt(o, stack().peek());
|
||
if (stack().peek(1) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(1) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-top must be of type int[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(1))).getBasicType();
|
||
if (t != Type.INT){
|
||
constraintViolated(o, "Stack next-to-top must be of type int[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIAND(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIASTORE(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
indexOfInt(o, stack().peek(1));
|
||
if (stack().peek(2) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(2) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type int[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(2))).getBasicType();
|
||
if (t != Type.INT){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type int[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitICONST(Instruction o){
|
||
//nothing to do here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIDIV(Instruction o){
|
||
checkTop(o,Type.INT);
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIF_ACMPEQ(Instruction o){
|
||
if (!(stack().peek() instanceof ReferenceType)){
|
||
constraintViolated(o, "The value at the stack top is not of a ReferenceType, but of type '"+stack().peek()+"'.");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek()) );
|
||
|
||
if (!(stack().peek(1) instanceof ReferenceType)){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of a ReferenceType, but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek(1)) );
|
||
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIF_ACMPNE(Instruction o){
|
||
if (!(stack().peek() instanceof ReferenceType)){
|
||
constraintViolated(o, "The value at the stack top is not of a ReferenceType, but of type '"+stack().peek()+"'.");
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek()) );
|
||
}
|
||
if (!(stack().peek(1) instanceof ReferenceType)){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of a ReferenceType, but of type '"+stack().peek(1)+"'.");
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek(1)) );
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIF_ICMPEQ(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIF_ICMPGE(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIF_ICMPGT(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIF_ICMPLE(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIF_ICMPLT(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIF_ICMPNE(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIFEQ(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIFGE(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIFGT(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIFLE(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIFLT(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIFNE(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIFNONNULL(Instruction o){
|
||
if (!(stack().peek() instanceof ReferenceType)){
|
||
constraintViolated(o, "The value at the stack top is not of a ReferenceType, but of type '"+stack().peek()+"'.");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek()) );
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIFNULL(Instruction o){
|
||
if (!(stack().peek() instanceof ReferenceType)){
|
||
constraintViolated(o, "The value at the stack top is not of a ReferenceType, but of type '"+stack().peek()+"'.");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek()) );
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIINC(IINC o){
|
||
// Mhhh. In BCEL, at this time "IINC" is not a LocalVariableInstruction.
|
||
if (locals().maxLocals() <= (o.getType(cpg).getSize()==1? o.getIndex() : o.getIndex()+1) ){
|
||
constraintViolated(o, "The 'index' is not a valid index into the local variable array.");
|
||
}
|
||
|
||
indexOfInt(o, locals().get(o.getIndex()));
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitILOAD(Instruction o){
|
||
// All done by visitLocalVariableInstruction(), visitLoadInstruction()
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIMPDEP1(Instruction o){
|
||
throw new AssertionViolatedException("In this JustIce verification pass there should not occur an illegal instruction such as IMPDEP1.");
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIMPDEP2(Instruction o){
|
||
throw new AssertionViolatedException("In this JustIce verification pass there should not occur an illegal instruction such as IMPDEP2.");
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIMUL(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitINEG(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitINSTANCEOF(Instruction o){
|
||
// The objectref must be of type reference.
|
||
Type objectref = stack().peek(0);
|
||
if (!(objectref instanceof ReferenceType)){
|
||
constraintViolated(o, "The 'objectref' is not of a ReferenceType but of type "+objectref+".");
|
||
}
|
||
else{
|
||
referenceTypeIsInitialized(o, (ReferenceType) objectref);
|
||
}
|
||
// The unsigned indexbyte1 and indexbyte2 are used to construct an index into the runtime constant pool of the
|
||
// current class (<28>3.6), where the value of the index is (indexbyte1 << 8) | indexbyte2. The runtime constant
|
||
// pool item at the index must be a symbolic reference to a class, array, or interface type.
|
||
Constant c = cpg.getConstant(o.getIndex());
|
||
if (! (c instanceof ConstantClass)){
|
||
constraintViolated(o, "The Constant at 'index' is not a ConstantClass, but '"+c+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitINVOKEINTERFACE(INVOKEINTERFACE o){
|
||
// Method is not native, otherwise pass 3 would not happen.
|
||
|
||
int count = o.getCount();
|
||
if (count == 0){
|
||
constraintViolated(o, "The 'count' argument must not be 0.");
|
||
}
|
||
// It is a ConstantInterfaceMethodref, Pass 3a made it sure.
|
||
// TODO: Do we want to do anything with it?
|
||
//ConstantInterfaceMethodref cimr = (ConstantInterfaceMethodref) (cpg.getConstant(o.getIndex()));
|
||
|
||
// the o.getClassType(cpg) type has passed pass 2; see visitLoadClass(o).
|
||
|
||
Type t = o.getType(cpg);
|
||
if (t instanceof ObjectType){
|
||
String name = ((ObjectType)t).getClassName();
|
||
Verifier v = VerifierFactory.getVerifier( name );
|
||
VerificationResult vr = v.doPass2();
|
||
if (vr.getStatus() != VerificationResult.VERIFIED_OK){
|
||
constraintViolated((Instruction) o, "Class '"+name+"' is referenced, but cannot be loaded and resolved: '"+vr+"'.");
|
||
}
|
||
}
|
||
|
||
|
||
Type[] argtypes = o.getArgumentTypes(cpg);
|
||
int nargs = argtypes.length;
|
||
|
||
for (int i=nargs-1; i>=0; i--){
|
||
Type fromStack = stack().peek( (nargs-1) - i ); // 0 to nargs-1
|
||
Type fromDesc = argtypes[i];
|
||
if (fromDesc == Type.BOOLEAN ||
|
||
fromDesc == Type.BYTE ||
|
||
fromDesc == Type.CHAR ||
|
||
fromDesc == Type.SHORT){
|
||
fromDesc = Type.INT;
|
||
}
|
||
if (! fromStack.equals(fromDesc)){
|
||
if (fromStack instanceof ReferenceType && fromDesc instanceof ReferenceType){
|
||
//ReferenceType rFromStack = (ReferenceType) fromStack;
|
||
//ReferenceType rFromDesc = (ReferenceType) fromDesc;
|
||
// TODO: This can only be checked when using Staerk-et-al's "set of object types"
|
||
// instead of a "wider cast object type" created during verification.
|
||
//if ( ! rFromStack.isAssignmentCompatibleWith(rFromDesc) ){
|
||
// constraintViolated(o, "Expecting a '"+fromDesc+"' but found a '"+fromStack+"' on the stack (which is not assignment compatible).");
|
||
//}
|
||
}
|
||
else{
|
||
constraintViolated(o, "Expecting a '"+fromDesc+"' but found a '"+fromStack+"' on the stack.");
|
||
}
|
||
}
|
||
}
|
||
|
||
Type objref = stack().peek(nargs);
|
||
if (objref == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (objref instanceof ReferenceType) ){
|
||
constraintViolated(o, "Expecting a reference type as 'objectref' on the stack, not a '"+objref+"'.");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) objref);
|
||
if (!(objref instanceof ObjectType)){
|
||
if (!(objref instanceof ArrayType)){
|
||
constraintViolated(o, "Expecting an ObjectType as 'objectref' on the stack, not a '"+objref+"'."); // could be a ReturnaddressType
|
||
}
|
||
else{
|
||
objref = GENERIC_ARRAY;
|
||
}
|
||
}
|
||
|
||
// String objref_classname = ((ObjectType) objref).getClassName();
|
||
// String theInterface = o.getClassName(cpg);
|
||
// TODO: This can only be checked if we're using Staerk-et-al's "set of object types"
|
||
// instead of "wider cast object types" generated during verification.
|
||
//if ( ! Repository.implementationOf(objref_classname, theInterface) ){
|
||
// constraintViolated(o, "The 'objref' item '"+objref+"' does not implement '"+theInterface+"' as expected.");
|
||
//}
|
||
|
||
int counted_count = 1; // 1 for the objectref
|
||
for (int i=0; i<nargs; i++){
|
||
counted_count += argtypes[i].getSize();
|
||
}
|
||
if (count != counted_count){
|
||
constraintViolated(o, "The 'count' argument should probably read '"+counted_count+"' but is '"+count+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitINVOKESPECIAL(InvokeInstruction o){
|
||
// Don't init an object twice.
|
||
if ( (o.getMethodName(cpg).equals(Constants.CONSTRUCTOR_NAME)) && (!(stack().peek(o.getArgumentTypes(cpg).length) instanceof UninitializedObjectType)) ){
|
||
constraintViolated(o, "Possibly initializing object twice. A valid instruction sequence must not have an uninitialized object on the operand stack or in a local variable during a backwards branch, or in a local variable in code protected by an exception handler. Please see The Java Virtual Machine Specification, Second Edition, 4.9.4 (pages 147 and 148) for details.");
|
||
}
|
||
|
||
// the o.getClassType(cpg) type has passed pass 2; see visitLoadClass(o).
|
||
|
||
Type t = o.getType(cpg);
|
||
if (t instanceof ObjectType){
|
||
String name = ((ObjectType)t).getClassName();
|
||
Verifier v = VerifierFactory.getVerifier( name );
|
||
VerificationResult vr = v.doPass2();
|
||
if (vr.getStatus() != VerificationResult.VERIFIED_OK){
|
||
constraintViolated((Instruction) o, "Class '"+name+"' is referenced, but cannot be loaded and resolved: '"+vr+"'.");
|
||
}
|
||
}
|
||
|
||
|
||
Type[] argtypes = o.getArgumentTypes(cpg);
|
||
int nargs = argtypes.length;
|
||
|
||
for (int i=nargs-1; i>=0; i--){
|
||
Type fromStack = stack().peek( (nargs-1) - i ); // 0 to nargs-1
|
||
Type fromDesc = argtypes[i];
|
||
if (fromDesc == Type.BOOLEAN ||
|
||
fromDesc == Type.BYTE ||
|
||
fromDesc == Type.CHAR ||
|
||
fromDesc == Type.SHORT){
|
||
fromDesc = Type.INT;
|
||
}
|
||
if (! fromStack.equals(fromDesc)){
|
||
if (fromStack instanceof ReferenceType && fromDesc instanceof ReferenceType){
|
||
ReferenceType rFromStack = (ReferenceType) fromStack;
|
||
ReferenceType rFromDesc = (ReferenceType) fromDesc;
|
||
// TODO: This can only be checked using Staerk-et-al's "set of object types", not
|
||
// using a "wider cast object type".
|
||
if ( ! rFromStack.isAssignmentCompatibleWith(rFromDesc) ){
|
||
constraintViolated(o, "Expecting a '"+fromDesc+"' but found a '"+fromStack+"' on the stack (which is not assignment compatible).");
|
||
}
|
||
}
|
||
else{
|
||
constraintViolated(o, "Expecting a '"+fromDesc+"' but found a '"+fromStack+"' on the stack.");
|
||
}
|
||
}
|
||
}
|
||
|
||
Type objref = stack().peek(nargs);
|
||
if (objref == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (objref instanceof ReferenceType) ){
|
||
constraintViolated(o, "Expecting a reference type as 'objectref' on the stack, not a '"+objref+"'.");
|
||
}
|
||
String objref_classname = null;
|
||
if ( !(o.getMethodName(cpg).equals(Constants.CONSTRUCTOR_NAME))){
|
||
referenceTypeIsInitialized(o, (ReferenceType) objref);
|
||
if (!(objref instanceof ObjectType)){
|
||
if (!(objref instanceof ArrayType)){
|
||
constraintViolated(o, "Expecting an ObjectType as 'objectref' on the stack, not a '"+objref+"'."); // could be a ReturnaddressType
|
||
}
|
||
else{
|
||
objref = GENERIC_ARRAY;
|
||
}
|
||
}
|
||
|
||
objref_classname = ((ObjectType) objref).getClassName();
|
||
}
|
||
else{
|
||
if (!(objref instanceof UninitializedObjectType)){
|
||
constraintViolated(o, "Expecting an UninitializedObjectType as 'objectref' on the stack, not a '"+objref+"'. Otherwise, you couldn't invoke a method since an array has no methods (not to speak of a return address).");
|
||
}
|
||
objref_classname = ((UninitializedObjectType) objref).getInitialized().getClassName();
|
||
}
|
||
|
||
|
||
String theClass = o.getClassName(cpg);
|
||
if ( ! Repository.instanceOf(objref_classname, theClass) ){
|
||
constraintViolated(o, "The 'objref' item '"+objref+"' does not implement '"+theClass+"' as expected.");
|
||
}
|
||
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitINVOKESTATIC(InvokeInstruction o){
|
||
// Method is not native, otherwise pass 3 would not happen.
|
||
|
||
Type t = o.getType(cpg);
|
||
if (t instanceof ObjectType){
|
||
String name = ((ObjectType)t).getClassName();
|
||
Verifier v = VerifierFactory.getVerifier( name );
|
||
VerificationResult vr = v.doPass2();
|
||
if (vr.getStatus() != VerificationResult.VERIFIED_OK){
|
||
constraintViolated((Instruction) o, "Class '"+name+"' is referenced, but cannot be loaded and resolved: '"+vr+"'.");
|
||
}
|
||
}
|
||
|
||
Type[] argtypes = o.getArgumentTypes(cpg);
|
||
int nargs = argtypes.length;
|
||
|
||
for (int i=nargs-1; i>=0; i--){
|
||
Type fromStack = stack().peek( (nargs-1) - i ); // 0 to nargs-1
|
||
Type fromDesc = argtypes[i];
|
||
if (fromDesc == Type.BOOLEAN ||
|
||
fromDesc == Type.BYTE ||
|
||
fromDesc == Type.CHAR ||
|
||
fromDesc == Type.SHORT){
|
||
fromDesc = Type.INT;
|
||
}
|
||
if (! fromStack.equals(fromDesc)){
|
||
if (fromStack instanceof ReferenceType && fromDesc instanceof ReferenceType){
|
||
ReferenceType rFromStack = (ReferenceType) fromStack;
|
||
ReferenceType rFromDesc = (ReferenceType) fromDesc;
|
||
// TODO: This check can possibly only be done using Staerk-et-al's "set of object types"
|
||
// instead of a "wider cast object type" created during verification.
|
||
if ( ! rFromStack.isAssignmentCompatibleWith(rFromDesc) ){
|
||
constraintViolated(o, "Expecting a '"+fromDesc+"' but found a '"+fromStack+"' on the stack (which is not assignment compatible).");
|
||
}
|
||
}
|
||
else{
|
||
constraintViolated(o, "Expecting a '"+fromDesc+"' but found a '"+fromStack+"' on the stack.");
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitINVOKEVIRTUAL(InvokeInstruction o){
|
||
// the o.getClassType(cpg) type has passed pass 2; see visitLoadClass(o).
|
||
|
||
Type t = o.getType(cpg);
|
||
if (t instanceof ObjectType){
|
||
String name = ((ObjectType)t).getClassName();
|
||
Verifier v = VerifierFactory.getVerifier( name );
|
||
VerificationResult vr = v.doPass2();
|
||
if (vr.getStatus() != VerificationResult.VERIFIED_OK){
|
||
constraintViolated((Instruction) o, "Class '"+name+"' is referenced, but cannot be loaded and resolved: '"+vr+"'.");
|
||
}
|
||
}
|
||
|
||
|
||
Type[] argtypes = o.getArgumentTypes(cpg);
|
||
int nargs = argtypes.length;
|
||
|
||
for (int i=nargs-1; i>=0; i--){
|
||
Type fromStack = stack().peek( (nargs-1) - i ); // 0 to nargs-1
|
||
Type fromDesc = argtypes[i];
|
||
if (fromDesc == Type.BOOLEAN ||
|
||
fromDesc == Type.BYTE ||
|
||
fromDesc == Type.CHAR ||
|
||
fromDesc == Type.SHORT){
|
||
fromDesc = Type.INT;
|
||
}
|
||
if (! fromStack.equals(fromDesc)){
|
||
if (fromStack instanceof ReferenceType && fromDesc instanceof ReferenceType){
|
||
ReferenceType rFromStack = (ReferenceType) fromStack;
|
||
ReferenceType rFromDesc = (ReferenceType) fromDesc;
|
||
// TODO: This can possibly only be checked when using Staerk-et-al's "set of object types" instead
|
||
// of a single "wider cast object type" created during verification.
|
||
if ( ! rFromStack.isAssignmentCompatibleWith(rFromDesc) ){
|
||
constraintViolated(o, "Expecting a '"+fromDesc+"' but found a '"+fromStack+"' on the stack (which is not assignment compatible).");
|
||
}
|
||
}
|
||
else{
|
||
constraintViolated(o, "Expecting a '"+fromDesc+"' but found a '"+fromStack+"' on the stack.");
|
||
}
|
||
}
|
||
}
|
||
|
||
Type objref = stack().peek(nargs);
|
||
if (objref == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (objref instanceof ReferenceType) ){
|
||
constraintViolated(o, "Expecting a reference type as 'objectref' on the stack, not a '"+objref+"'.");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) objref);
|
||
if (!(objref instanceof ObjectType)){
|
||
if (!(objref instanceof ArrayType)){
|
||
constraintViolated(o, "Expecting an ObjectType as 'objectref' on the stack, not a '"+objref+"'."); // could be a ReturnaddressType
|
||
}
|
||
else{
|
||
objref = GENERIC_ARRAY;
|
||
}
|
||
}
|
||
|
||
String objref_classname = ((ObjectType) objref).getClassName();
|
||
|
||
String theClass = o.getClassName(cpg);
|
||
|
||
if ( ! Repository.instanceOf(objref_classname, theClass) ){
|
||
constraintViolated(o, "The 'objref' item '"+objref+"' does not implement '"+theClass+"' as expected.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIOR(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIREM(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIRETURN(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitISHL(Instruction o){
|
||
checkTop(o,Type.INT);
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitISHR(Instruction o){
|
||
checkTop(o,Type.INT);
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitISTORE(Instruction o){
|
||
//visitStoreInstruction(StoreInstruction) is called before.
|
||
|
||
// Nothing else needs to be done here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitISUB(Instruction o){
|
||
checkTop(o,Type.INT);
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIUSHR(Instruction o){
|
||
checkTop(o,Type.INT);
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitIXOR(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.INT){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'int', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitJSR(InstructionBranch o){
|
||
// nothing to do here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitJSR_W(InstructionBranch o){
|
||
// nothing to do here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitL2D(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitL2F(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitL2I(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLADD(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLALOAD(Instruction o){
|
||
indexOfInt(o, stack().peek());
|
||
if (stack().peek(1) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(1) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-top must be of type long[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(1))).getBasicType();
|
||
if (t != Type.LONG){
|
||
constraintViolated(o, "Stack next-to-top must be of type long[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLAND(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLASTORE(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
indexOfInt(o, stack().peek(1));
|
||
if (stack().peek(2) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(2) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type long[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(2))).getBasicType();
|
||
if (t != Type.LONG){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type long[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLCMP(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLCONST(Instruction o){
|
||
// Nothing to do here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLDC(Instruction o){
|
||
// visitCPInstruction is called first.
|
||
|
||
Constant c = cpg.getConstant(o.getIndex());
|
||
if (! ( ( c instanceof ConstantInteger) ||
|
||
( c instanceof ConstantFloat ) ||
|
||
( c instanceof ConstantString ) ) ){
|
||
constraintViolated(o, "Referenced constant should be a CONSTANT_Integer, a CONSTANT_Float or a CONSTANT_String, but is '"+c+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLDC_W(Instruction o){
|
||
// visitCPInstruction is called first.
|
||
|
||
Constant c = cpg.getConstant(o.getIndex());
|
||
if (! ( ( c instanceof ConstantInteger) ||
|
||
( c instanceof ConstantFloat ) ||
|
||
( c instanceof ConstantString ) ) ){
|
||
constraintViolated(o, "Referenced constant should be a CONSTANT_Integer, a CONSTANT_Float or a CONSTANT_String, but is '"+c+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLDC2_W(Instruction o){
|
||
// visitCPInstruction is called first.
|
||
|
||
Constant c = cpg.getConstant(o.getIndex());
|
||
if (! ( ( c instanceof ConstantLong) ||
|
||
( c instanceof ConstantDouble ) ) ){
|
||
constraintViolated(o, "Referenced constant should be a CONSTANT_Integer, a CONSTANT_Float or a CONSTANT_String, but is '"+c+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLDIV(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLLOAD(Instruction o){
|
||
//visitLoadInstruction(LoadInstruction) is called before.
|
||
|
||
// Nothing else needs to be done here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLMUL(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitLNEG(Instruction o){
|
||
checkTop(o,Type.LONG);
|
||
}
|
||
|
||
public void visitLOOKUPSWITCH(LOOKUPSWITCH o){
|
||
checkTop(o,Type.INT);
|
||
// See also pass 3a.
|
||
}
|
||
|
||
public void visitLOR(Instruction o){
|
||
if (stack().peek() != Type.LONG){
|
||
constraintViolated(o, "The value at the stack top is not of type 'long', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitLREM(Instruction o){
|
||
checkTop(o,Type.LONG);
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitLRETURN(Instruction o) { checkTop(o,Type.LONG); }
|
||
public void visitLSHL(Instruction o){
|
||
checkTop(o,Type.INT);
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLSHR(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLSTORE(Instruction o){
|
||
//visitStoreInstruction(StoreInstruction) is called before.
|
||
|
||
// Nothing else needs to be done here.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLSUB(Instruction o){
|
||
checkTop(o,Type.LONG);
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLUSHR(Instruction o){
|
||
checkTop(o,Type.INT);
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitLXOR(Instruction o){
|
||
checkTop(o,Type.LONG);
|
||
if (stack().peek(1) != Type.LONG){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of type 'long', but of type '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitMONITORENTER(Instruction o){
|
||
if (! ((stack().peek()) instanceof ReferenceType)){
|
||
constraintViolated(o, "The stack top should be of a ReferenceType, but is '"+stack().peek()+"'.");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek()) );
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitMONITOREXIT(Instruction o){
|
||
if (! ((stack().peek()) instanceof ReferenceType)){
|
||
constraintViolated(o, "The stack top should be of a ReferenceType, but is '"+stack().peek()+"'.");
|
||
}
|
||
referenceTypeIsInitialized(o, (ReferenceType) (stack().peek()) );
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitMULTIANEWARRAY(MULTIANEWARRAY o){
|
||
int dimensions = o.getDimensions();
|
||
// Dimensions argument is okay: see Pass 3a.
|
||
for (int i=0; i<dimensions; i++){
|
||
if (stack().peek(i) != Type.INT){
|
||
constraintViolated(o, "The '"+dimensions+"' upper stack types should be 'int' but aren't.");
|
||
}
|
||
}
|
||
// The runtime constant pool item at that index must be a symbolic reference to a class,
|
||
// array, or interface type. See Pass 3a.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitNEW(Instruction o){
|
||
//visitCPInstruction(CPInstruction) has been called before.
|
||
//visitLoadClass(LoadClass) has been called before.
|
||
|
||
Type t = o.getType(cpg);
|
||
if (! (t instanceof ReferenceType)){
|
||
throw new AssertionViolatedException("NEW.getType() returning a non-reference type?!");
|
||
}
|
||
if (! (t instanceof ObjectType)){
|
||
constraintViolated(o, "Expecting a class type (ObjectType) to work on. Found: '"+t+"'.");
|
||
}
|
||
ObjectType obj = (ObjectType) t;
|
||
|
||
//e.g.: Don't instantiate interfaces
|
||
if (! obj.referencesClass()){
|
||
constraintViolated(o, "Expecting a class type (ObjectType) to work on. Found: '"+obj+"'.");
|
||
}
|
||
}
|
||
|
||
public void visitNEWARRAY(Instruction o) { checkTop(o,Type.INT); }
|
||
public void visitNOP(Instruction o){ /* nothing is to be done here */ }
|
||
|
||
public void visitPOP(Instruction o){
|
||
if (stack().peek().getSize() != 1){
|
||
constraintViolated(o, "Stack top size should be 1 but stack top is '"+stack().peek()+"' of size '"+stack().peek().getSize()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitPOP2(Instruction o){
|
||
if (stack().peek().getSize() != 2){
|
||
constraintViolated(o, "Stack top size should be 2 but stack top is '"+stack().peek()+"' of size '"+stack().peek().getSize()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitPUTFIELD(FieldInstruction o){
|
||
|
||
Type objectref = stack().peek(1);
|
||
if (! ( (objectref instanceof ObjectType) || (objectref == Type.NULL) ) ){
|
||
constraintViolated(o, "Stack next-to-top should be an object reference that's not an array reference, but is '"+objectref+"'.");
|
||
}
|
||
|
||
String field_name = o.getFieldName(cpg);
|
||
|
||
JavaClass jc = Repository.lookupClass(o.getClassType(cpg).getClassName());
|
||
Field[] fields = jc.getFields();
|
||
Field f = null;
|
||
for (int i=0; i<fields.length; i++){
|
||
if (fields[i].getName().equals(field_name)){
|
||
f = fields[i];
|
||
break;
|
||
}
|
||
}
|
||
if (f == null){
|
||
throw new AssertionViolatedException("Field not found?!?");
|
||
}
|
||
|
||
Type value = stack().peek();
|
||
Type t = Type.getType(f.getSignature());
|
||
Type shouldbe = t;
|
||
if (shouldbe == Type.BOOLEAN ||
|
||
shouldbe == Type.BYTE ||
|
||
shouldbe == Type.CHAR ||
|
||
shouldbe == Type.SHORT){
|
||
shouldbe = Type.INT;
|
||
}
|
||
if (t instanceof ReferenceType){
|
||
ReferenceType rvalue = null;
|
||
if (value instanceof ReferenceType){
|
||
rvalue = (ReferenceType) value;
|
||
referenceTypeIsInitialized(o, rvalue);
|
||
}
|
||
else{
|
||
constraintViolated(o, "The stack top type '"+value+"' is not of a reference type as expected.");
|
||
}
|
||
// TODO: This can possibly only be checked using Staerk-et-al's "set-of-object types", not
|
||
// using "wider cast object types" created during verification.
|
||
// Comment it out if you encounter problems. See also the analogon at visitPUTSTATIC.
|
||
if (!(rvalue.isAssignmentCompatibleWith(shouldbe))){
|
||
constraintViolated(o, "The stack top type '"+value+"' is not assignment compatible with '"+shouldbe+"'.");
|
||
}
|
||
}
|
||
else{
|
||
if (shouldbe != value){
|
||
constraintViolated(o, "The stack top type '"+value+"' is not of type '"+shouldbe+"' as expected.");
|
||
}
|
||
}
|
||
|
||
if (f.isProtected()){
|
||
ObjectType classtype = o.getClassType(cpg);
|
||
ObjectType curr = new ObjectType(mg.getClassName());
|
||
|
||
if ( classtype.equals(curr) ||
|
||
curr.subclassOf(classtype) ){
|
||
Type tp = stack().peek(1);
|
||
if (tp == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (tp instanceof ObjectType) ){
|
||
constraintViolated(o, "The 'objectref' must refer to an object that's not an array. Found instead: '"+tp+"'.");
|
||
}
|
||
ObjectType objreftype = (ObjectType) tp;
|
||
if (! ( objreftype.equals(curr) ||
|
||
objreftype.subclassOf(curr) ) ){
|
||
constraintViolated(o, "The referenced field has the ACC_PROTECTED modifier, and it's a member of the current class or a superclass of the current class. However, the referenced object type '"+stack().peek()+"' is not the current class or a subclass of the current class.");
|
||
}
|
||
}
|
||
}
|
||
|
||
// TODO: Could go into Pass 3a.
|
||
if (f.isStatic()){
|
||
constraintViolated(o, "Referenced field '"+f+"' is static which it shouldn't be.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitPUTSTATIC(FieldInstruction o){
|
||
String field_name = o.getFieldName(cpg);
|
||
JavaClass jc = Repository.lookupClass(o.getClassType(cpg).getClassName());
|
||
Field[] fields = jc.getFields();
|
||
Field f = null;
|
||
for (int i=0; i<fields.length; i++){
|
||
if (fields[i].getName().equals(field_name)){
|
||
f = fields[i];
|
||
break;
|
||
}
|
||
}
|
||
if (f == null){
|
||
throw new AssertionViolatedException("Field not found?!?");
|
||
}
|
||
Type value = stack().peek();
|
||
Type t = Type.getType(f.getSignature());
|
||
Type shouldbe = t;
|
||
if (shouldbe == Type.BOOLEAN ||
|
||
shouldbe == Type.BYTE ||
|
||
shouldbe == Type.CHAR ||
|
||
shouldbe == Type.SHORT){
|
||
shouldbe = Type.INT;
|
||
}
|
||
if (t instanceof ReferenceType){
|
||
ReferenceType rvalue = null;
|
||
if (value instanceof ReferenceType){
|
||
rvalue = (ReferenceType) value;
|
||
referenceTypeIsInitialized(o, rvalue);
|
||
}
|
||
else{
|
||
constraintViolated(o, "The stack top type '"+value+"' is not of a reference type as expected.");
|
||
}
|
||
// TODO: This can possibly only be checked using Staerk-et-al's "set-of-object types", not
|
||
// using "wider cast object types" created during verification.
|
||
// Comment it out if you encounter problems. See also the analogon at visitPUTFIELD.
|
||
if (!(rvalue.isAssignmentCompatibleWith(shouldbe))){
|
||
constraintViolated(o, "The stack top type '"+value+"' is not assignment compatible with '"+shouldbe+"'.");
|
||
}
|
||
}
|
||
else{
|
||
if (shouldbe != value){
|
||
constraintViolated(o, "The stack top type '"+value+"' is not of type '"+shouldbe+"' as expected.");
|
||
}
|
||
}
|
||
// TODO: Interface fields may be assigned to only once. (Hard to implement in
|
||
// JustIce's execution model). This may only happen in <clinit>, see Pass 3a.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitRET(RET o){
|
||
if (! (locals().get(o.getIndex()) instanceof ReturnaddressType)){
|
||
constraintViolated(o, "Expecting a ReturnaddressType in local variable "+o.getIndex()+".");
|
||
}
|
||
if (locals().get(o.getIndex()) == ReturnaddressType.NO_TARGET){
|
||
throw new AssertionViolatedException("Oops: RET expecting a target!");
|
||
}
|
||
// Other constraints such as non-allowed overlapping subroutines are enforced
|
||
// while building the Subroutines data structure.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitRETURN(Instruction o){
|
||
if (mg.getName().equals(Constants.CONSTRUCTOR_NAME)){// If we leave an <init> method
|
||
if ((Frame._this != null) && (!(mg.getClassName().equals(Type.OBJECT.getClassName()))) ) {
|
||
constraintViolated(o, "Leaving a constructor that itself did not call a constructor.");
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitSALOAD(Instruction o){
|
||
indexOfInt(o, stack().peek());
|
||
if (stack().peek(1) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(1) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-top must be of type short[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(1))).getBasicType();
|
||
if (t != Type.SHORT){
|
||
constraintViolated(o, "Stack next-to-top must be of type short[] but is '"+stack().peek(1)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitSASTORE(Instruction o){
|
||
if (stack().peek() != Type.INT){
|
||
constraintViolated(o, "The value at the stack top is not of type 'int', but of type '"+stack().peek()+"'.");
|
||
}
|
||
indexOfInt(o, stack().peek(1));
|
||
if (stack().peek(2) == Type.NULL){
|
||
return;
|
||
}
|
||
if (! (stack().peek(2) instanceof ArrayType)){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type short[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
Type t = ((ArrayType) (stack().peek(2))).getBasicType();
|
||
if (t != Type.SHORT){
|
||
constraintViolated(o, "Stack next-to-next-to-top must be of type short[] but is '"+stack().peek(2)+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitSIPUSH(Instruction o){
|
||
// nothing to do here. Generic visitXXX() methods did the trick before.
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitSWAP(Instruction o){
|
||
if (stack().peek().getSize() != 1){
|
||
constraintViolated(o, "The value at the stack top is not of size '1', but of size '"+stack().peek().getSize()+"'.");
|
||
}
|
||
if (stack().peek(1).getSize() != 1){
|
||
constraintViolated(o, "The value at the stack next-to-top is not of size '1', but of size '"+stack().peek(1).getSize()+"'.");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Ensures the specific preconditions of the said instruction.
|
||
*/
|
||
public void visitTABLESWITCH(TABLESWITCH o){
|
||
indexOfInt(o, stack().peek());
|
||
// See Pass 3a.
|
||
}
|
||
|
||
}
|
||
|