93 lines
3.1 KiB
Java
93 lines
3.1 KiB
Java
/**
|
|
*
|
|
* Copyright (c) 2009-2012,
|
|
*
|
|
* Galois, Inc. (Aaron Tomb <atomb@galois.com>,
|
|
* Rogan Creswick <creswick@galois.com>,
|
|
* Adam Foltzer <acfoltzer@galois.com>)
|
|
* Steve Suh <suhsteve@gmail.com>
|
|
*
|
|
* 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 names of the contributors may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS 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 COPYRIGHT OWNER OR 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.
|
|
*
|
|
*
|
|
*/
|
|
package org.scandroid.flow.functions;
|
|
|
|
import org.scandroid.domain.CodeElement;
|
|
import org.scandroid.domain.DomainElement;
|
|
import org.scandroid.domain.IFDSTaintDomain;
|
|
import org.scandroid.domain.LocalElement;
|
|
import org.scandroid.domain.ReturnElement;
|
|
|
|
import com.ibm.wala.dataflow.IFDS.IUnaryFlowFunction;
|
|
import com.ibm.wala.ssa.ISSABasicBlock;
|
|
import com.ibm.wala.util.intset.IntSet;
|
|
import com.ibm.wala.util.intset.SparseIntSet;
|
|
|
|
/**
|
|
* @author creswick
|
|
*
|
|
*/
|
|
public class ReturnFlowFunction<E extends ISSABasicBlock> implements
|
|
IUnaryFlowFunction {
|
|
|
|
private final IFDSTaintDomain<E> domain;
|
|
private final CodeElement ce;
|
|
|
|
/**
|
|
* @param domain
|
|
* @param def
|
|
* of the invoke instruction we're returning to
|
|
*/
|
|
public ReturnFlowFunction(IFDSTaintDomain<E> domain, int def) {
|
|
this.domain = domain;
|
|
this.ce = new LocalElement(def);
|
|
}
|
|
|
|
/*
|
|
* (non-Javadoc)
|
|
*
|
|
* @see com.ibm.wala.dataflow.IFDS.IUnaryFlowFunction#getTargets(int)
|
|
*/
|
|
@Override
|
|
public IntSet getTargets(int d1) {
|
|
if (0 == d1) {
|
|
return TaintTransferFunctions.ZERO_SET;
|
|
}
|
|
|
|
DomainElement de = domain.getMappedObject(d1);
|
|
// if the domain element is a return element, propagate its taint
|
|
if (de.codeElement instanceof ReturnElement) {
|
|
return SparseIntSet.singleton(domain
|
|
.getMappedIndex(new DomainElement(ce, de.taintSource)));
|
|
}
|
|
return TaintTransferFunctions.EMPTY_SET;
|
|
}
|
|
}
|