170 lines
5.4 KiB
Java
170 lines
5.4 KiB
Java
/*******************************************************************************
|
|
* Copyright (c) 2002 - 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.callgraph.propagation;
|
|
|
|
import com.ibm.wala.classLoader.ArrayClass;
|
|
import com.ibm.wala.classLoader.IClass;
|
|
import com.ibm.wala.classLoader.IMethod;
|
|
import com.ibm.wala.classLoader.NewSiteReference;
|
|
import com.ibm.wala.classLoader.ProgramCounter;
|
|
import com.ibm.wala.ipa.callgraph.AnalysisOptions;
|
|
import com.ibm.wala.ipa.callgraph.CGNode;
|
|
import com.ibm.wala.ipa.cha.IClassHierarchy;
|
|
import com.ibm.wala.types.Descriptor;
|
|
import com.ibm.wala.types.MethodReference;
|
|
import com.ibm.wala.types.TypeReference;
|
|
import com.ibm.wala.util.debug.Assertions;
|
|
|
|
/**
|
|
* This class provides Instance Key call backs where each instance is in the same equivalence class as all other instances of the
|
|
* same concrete type.
|
|
*/
|
|
public class ClassBasedInstanceKeys implements InstanceKeyFactory {
|
|
|
|
private final static boolean DEBUG = false;
|
|
|
|
private final AnalysisOptions options;
|
|
|
|
private final IClassHierarchy cha;
|
|
|
|
public ClassBasedInstanceKeys(AnalysisOptions options, IClassHierarchy cha) {
|
|
if (cha == null) {
|
|
throw new IllegalArgumentException("null cha");
|
|
}
|
|
this.cha = cha;
|
|
this.options = options;
|
|
}
|
|
|
|
@Override
|
|
public InstanceKey getInstanceKeyForAllocation(CGNode node, NewSiteReference allocation) {
|
|
if (allocation == null) {
|
|
throw new IllegalArgumentException("allocation is null");
|
|
}
|
|
|
|
if (String.valueOf(allocation).contains("java/lang/invoke/DirectMethodHandle$StaticAccessor")) {
|
|
System.err.println("got " + allocation + " in " + node);
|
|
}
|
|
|
|
|
|
if (options.getClassTargetSelector() == null) {
|
|
throw new IllegalStateException("options did not specify class target selector");
|
|
}
|
|
IClass type = options.getClassTargetSelector().getAllocatedTarget(node, allocation);
|
|
if (type == null) {
|
|
return null;
|
|
}
|
|
|
|
ConcreteTypeKey key = new ConcreteTypeKey(type);
|
|
|
|
return key;
|
|
}
|
|
|
|
/**
|
|
* @see com.ibm.wala.ipa.callgraph.propagation.InstanceKeyFactory#getInstanceKeyForMultiNewArray(com.ibm.wala.ipa.callgraph.CGNode,
|
|
* com.ibm.wala.classLoader.NewSiteReference, int) dim == 0 represents the first dimension, e.g., the [Object; instances in
|
|
* [[Object; e.g., the [[Object; instances in [[[Object; dim == 1 represents the second dimension, e.g., the [Object
|
|
* instances in [[[Object;
|
|
*/
|
|
@Override
|
|
public InstanceKey getInstanceKeyForMultiNewArray(CGNode node, NewSiteReference allocation, int dim) {
|
|
if (DEBUG) {
|
|
System.err.println(("getInstanceKeyForMultiNewArray " + allocation + " " + dim));
|
|
}
|
|
ArrayClass type = (ArrayClass) options.getClassTargetSelector().getAllocatedTarget(node, allocation);
|
|
assert (type != null);
|
|
if (DEBUG) {
|
|
System.err.println(("type: " + type));
|
|
}
|
|
assert type != null : "null type for " + allocation;
|
|
int i = 0;
|
|
while (i <= dim) {
|
|
i++;
|
|
if (type == null) {
|
|
Assertions.UNREACHABLE();
|
|
}
|
|
type = (ArrayClass) type.getElementClass();
|
|
if (DEBUG) {
|
|
System.err.println(("intermediate: " + i + " " + type));
|
|
}
|
|
}
|
|
if (DEBUG) {
|
|
System.err.println(("final type: " + type));
|
|
}
|
|
if (type == null) {
|
|
return null;
|
|
}
|
|
ConcreteTypeKey key = new ConcreteTypeKey(type);
|
|
|
|
return key;
|
|
}
|
|
|
|
@Override
|
|
public <T> InstanceKey getInstanceKeyForConstant(TypeReference type, T S) {
|
|
if (type == null || cha.lookupClass(type) == null) {
|
|
return null;
|
|
} else {
|
|
if (options.getUseConstantSpecificKeys()) {
|
|
return new ConstantKey<>(S, cha.lookupClass(type));
|
|
} else {
|
|
return new ConcreteTypeKey(cha.lookupClass(type));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return a set of ConcreteTypeKeys that represent the exceptions the PEI may throw.
|
|
*/
|
|
@Override
|
|
public InstanceKey getInstanceKeyForPEI(CGNode node, ProgramCounter peiLoc, TypeReference type) {
|
|
IClass klass = cha.lookupClass(type);
|
|
if (klass == null) {
|
|
return null;
|
|
}
|
|
return new ConcreteTypeKey(cha.lookupClass(type));
|
|
}
|
|
|
|
@Override
|
|
public InstanceKey getInstanceKeyForMetadataObject(Object obj, TypeReference objType) {
|
|
IClass cls = cha.lookupClass(objType);
|
|
assert cls != null : objType;
|
|
|
|
if (obj instanceof TypeReference) {
|
|
IClass klass = cha.lookupClass((TypeReference)obj);
|
|
if (klass == null) {
|
|
return new ConcreteTypeKey(cls);
|
|
} else {
|
|
// return the IClass itself, wrapped as a constant!
|
|
return new ConstantKey<>(klass, cls);
|
|
}
|
|
} else if (obj instanceof MethodReference) {
|
|
IMethod m = cha.resolveMethod((MethodReference)obj);
|
|
if (m == null) {
|
|
return new ConcreteTypeKey(cls);
|
|
} else {
|
|
return new ConstantKey<>(m, cls);
|
|
}
|
|
} else if (obj instanceof Descriptor) {
|
|
return new ConstantKey<>((Descriptor)obj, cls);
|
|
} else {
|
|
// other cases
|
|
throw new Error();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return Returns the class hierarchy.
|
|
*/
|
|
public IClassHierarchy getClassHierarchy() {
|
|
return cha;
|
|
}
|
|
|
|
}
|