soot.dava.toolkits.base.AST.transformations.TypeCastingError Maven / Gradle / Ivy
package soot.dava.toolkits.base.AST.transformations;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 1997 - 2018 Raja Vallée-Rai and others
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 2.1 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import soot.ByteType;
import soot.DoubleType;
import soot.FloatType;
import soot.IntType;
import soot.LongType;
import soot.PrimType;
import soot.ShortType;
import soot.Type;
import soot.Value;
import soot.ValueBox;
import soot.dava.internal.AST.ASTStatementSequenceNode;
import soot.dava.internal.asg.AugmentedStmt;
import soot.dava.toolkits.base.AST.analysis.DepthFirstAdapter;
import soot.grimp.internal.GCastExpr;
import soot.jimple.DefinitionStmt;
import soot.jimple.Stmt;
public class TypeCastingError extends DepthFirstAdapter {
public boolean myDebug = false;
public TypeCastingError() {
}
public TypeCastingError(boolean verbose) {
super(verbose);
}
public void inASTStatementSequenceNode(ASTStatementSequenceNode node) {
for (AugmentedStmt as : node.getStatements()) {
Stmt s = as.get_Stmt();
if (!(s instanceof DefinitionStmt)) {
continue;
}
DefinitionStmt ds = (DefinitionStmt) s;
if (myDebug) {
System.out.println("Definition stmt" + ds);
}
ValueBox rightBox = ds.getRightOpBox();
ValueBox leftBox = ds.getLeftOpBox();
Value right = rightBox.getValue();
Value left = leftBox.getValue();
if (!(left.getType() instanceof PrimType && right.getType() instanceof PrimType)) {
// only interested in prim type casting errors
if (myDebug) {
System.out.println("\tDefinition stmt does not contain prims no need to modify");
}
continue;
}
Type leftType = left.getType();
Type rightType = right.getType();
if (myDebug) {
System.out.println("Left type is: " + leftType);
}
if (myDebug) {
System.out.println("Right type is: " + rightType);
}
if (leftType.equals(rightType)) {
if (myDebug) {
System.out.println("\tTypes are the same");
}
if (myDebug) {
System.out.println("Right value is of instance" + right.getClass());
}
}
if (!leftType.equals(rightType)) {
if (myDebug) {
System.out.println("\tDefinition stmt has to be modified");
}
// ByteType, DoubleType, FloatType, IntType, LongType, ShortType
/*
* byte Byte-length integer 8-bit two's complement short Short integer 16-bit two's complement int Integer 32-bit
* two's complement long Long integer 64-bit two's complement float Single-precision floating point 32-bit IEEE 754
* double Double-precision floating point 64-bit IEEE 754
*/
if (leftType instanceof ByteType && (rightType instanceof DoubleType || rightType instanceof FloatType
|| rightType instanceof IntType || rightType instanceof LongType || rightType instanceof ShortType)) {
// loss of precision do explicit casting
if (DEBUG) {
System.out.println("Explicit casting to BYTE required");
}
rightBox.setValue(new GCastExpr(right, ByteType.v()));
if (DEBUG) {
System.out.println("New right expr is " + rightBox.getValue().toString());
}
continue;
}
if (leftType instanceof ShortType && (rightType instanceof DoubleType || rightType instanceof FloatType
|| rightType instanceof IntType || rightType instanceof LongType)) {
// loss of precision do explicit casting
if (DEBUG) {
System.out.println("Explicit casting to SHORT required");
}
rightBox.setValue(new GCastExpr(right, ShortType.v()));
if (DEBUG) {
System.out.println("New right expr is " + rightBox.getValue().toString());
}
continue;
}
if (leftType instanceof IntType
&& (rightType instanceof DoubleType || rightType instanceof FloatType || rightType instanceof LongType)) {
// loss of precision do explicit casting
if (myDebug) {
System.out.println("Explicit casting to INT required");
}
rightBox.setValue(new GCastExpr(right, IntType.v()));
if (myDebug) {
System.out.println("New right expr is " + rightBox.getValue().toString());
}
continue;
}
if (leftType instanceof LongType && (rightType instanceof DoubleType || rightType instanceof FloatType)) {
// loss of precision do explicit casting
if (DEBUG) {
System.out.println("Explicit casting to LONG required");
}
rightBox.setValue(new GCastExpr(right, LongType.v()));
if (DEBUG) {
System.out.println("New right expr is " + rightBox.getValue().toString());
}
continue;
}
if (leftType instanceof FloatType && rightType instanceof DoubleType) {
// loss of precision do explicit casting
if (DEBUG) {
System.out.println("Explicit casting to FLOAT required");
}
rightBox.setValue(new GCastExpr(right, FloatType.v()));
if (DEBUG) {
System.out.println("New right expr is " + rightBox.getValue().toString());
}
continue;
}
}
}
}
}