121 lines
4.0 KiB
Java
121 lines
4.0 KiB
Java
/*******************************************************************************
|
|
* Copyright (c) 2006 IBM Corporation.
|
|
* All rights reserved. This program and the accompanying materials
|
|
* are made available under the terms of the Eclipse Public License v1.0
|
|
* which accompanies this distribution, and is available at
|
|
* http://www.eclipse.org/legal/epl-v10.html
|
|
*
|
|
* Contributors:
|
|
* IBM Corporation - initial API and implementation
|
|
*******************************************************************************/
|
|
package com.ibm.wala.ipa.slicer;
|
|
|
|
import java.util.Collection;
|
|
import java.util.HashSet;
|
|
import java.util.Set;
|
|
|
|
import com.ibm.wala.ipa.callgraph.propagation.AbstractFieldPointerKey;
|
|
import com.ibm.wala.ipa.callgraph.propagation.PointerKey;
|
|
import com.ibm.wala.ipa.callgraph.propagation.StaticFieldKey;
|
|
import com.ibm.wala.types.TypeReference;
|
|
import com.ibm.wala.util.collections.HashSetFactory;
|
|
import com.ibm.wala.util.config.SetOfClasses;
|
|
import com.ibm.wala.util.debug.Assertions;
|
|
|
|
/**
|
|
* heap locations that should be excluded from data dependence during slicing
|
|
*/
|
|
public class HeapExclusions {
|
|
|
|
private static final boolean VERBOSE = false;
|
|
|
|
/**
|
|
* used only for verbose processing.
|
|
*/
|
|
private final static Collection<TypeReference> considered = HashSetFactory.make();
|
|
|
|
private final SetOfClasses set;
|
|
|
|
public HeapExclusions(SetOfClasses set) {
|
|
this.set = set;
|
|
}
|
|
|
|
/**
|
|
* @return the PointerKeys that are not excluded
|
|
* @throws IllegalArgumentException if s is null
|
|
*/
|
|
public Set<PointerKey> filter(Collection<PointerKey> s) {
|
|
if (s == null) {
|
|
throw new IllegalArgumentException("s is null");
|
|
}
|
|
HashSet<PointerKey> result = HashSetFactory.make();
|
|
for (PointerKey p : s) {
|
|
if (p instanceof AbstractFieldPointerKey) {
|
|
AbstractFieldPointerKey f = (AbstractFieldPointerKey) p;
|
|
if (f.getInstanceKey().getConcreteType() != null) {
|
|
if (!set.contains(f.getInstanceKey().getConcreteType().getReference().getName().toString().substring(1))) {
|
|
result.add(p);
|
|
if (VERBOSE) {
|
|
verboseAction(p);
|
|
}
|
|
} else {
|
|
// do nothing
|
|
}
|
|
}
|
|
} else if (p instanceof StaticFieldKey) {
|
|
StaticFieldKey sf = (StaticFieldKey) p;
|
|
if (!set.contains(sf.getField().getDeclaringClass().getReference().getName().toString().substring(1))) {
|
|
result.add(p);
|
|
if (VERBOSE) {
|
|
verboseAction(p);
|
|
}
|
|
} else {
|
|
// do nothing
|
|
}
|
|
} else {
|
|
Assertions.UNREACHABLE(s.getClass().toString());
|
|
}
|
|
|
|
}
|
|
return result;
|
|
}
|
|
|
|
private static void verboseAction(PointerKey p) {
|
|
if (p instanceof AbstractFieldPointerKey) {
|
|
AbstractFieldPointerKey f = (AbstractFieldPointerKey) p;
|
|
if (f.getInstanceKey().getConcreteType() != null) {
|
|
TypeReference t = f.getInstanceKey().getConcreteType().getReference();
|
|
if (!considered.contains(t)) {
|
|
considered.add(t);
|
|
System.err.println("Considered " + t);
|
|
}
|
|
}
|
|
} else if (p instanceof StaticFieldKey) {
|
|
StaticFieldKey sf = (StaticFieldKey) p;
|
|
TypeReference t = sf.getField().getDeclaringClass().getReference();
|
|
if (!considered.contains(t)) {
|
|
considered.add(t);
|
|
System.err.println("Considered " + t);
|
|
}
|
|
}
|
|
}
|
|
|
|
public boolean excludes(PointerKey pk) {
|
|
TypeReference t = getType(pk);
|
|
return (t == null) ? false : set.contains(t.getName().toString().substring(1));
|
|
}
|
|
|
|
public static TypeReference getType(PointerKey pk) {
|
|
if (pk instanceof AbstractFieldPointerKey) {
|
|
AbstractFieldPointerKey f = (AbstractFieldPointerKey) pk;
|
|
if (f.getInstanceKey().getConcreteType() != null) {
|
|
return f.getInstanceKey().getConcreteType().getReference();
|
|
}
|
|
} else if (pk instanceof StaticFieldKey) {
|
|
StaticFieldKey sf = (StaticFieldKey) pk;
|
|
return sf.getField().getDeclaringClass().getReference();
|
|
}
|
|
return null;
|
|
}
|
|
}
|