/* Soot - a J*va Optimization Framework
* Copyright (C) 2003 Feng Qian
*
* This library 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 library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* Simulates the native method side effects in class java.lang.Object.
*
* @author Feng Qian
*/
package soot.jimple.toolkits.pointer.nativemethods;
import soot.*;
import soot.jimple.toolkits.pointer.representations.*;
import soot.jimple.toolkits.pointer.util.*;
public class JavaLangObjectNative extends NativeMethodClass {
public JavaLangObjectNative( NativeHelper helper ) { super(helper); }
/**
* Implements the abstract method simulateMethod.
* It distributes the request to the corresponding methods
* by signatures.
*/
public void simulateMethod(SootMethod method,
ReferenceVariable thisVar,
ReferenceVariable returnVar,
ReferenceVariable params[]){
String subSignature = method.getSubSignature();
/* Driver */
if (subSignature.equals("java.lang.Class getClass()")) {
java_lang_Object_getClass(method, thisVar, returnVar, params);
return;
} else if (subSignature.equals("java.lang.Object clone()")) {
java_lang_Object_clone(method, thisVar, returnVar, params);
return;
} else {
defaultMethod(method, thisVar, returnVar, params);
return;
}
}
/*********************** java.lang.Object *********************/
/**
* The return variable is assigned an abstract object represneting
* all classes (UnknowClassObject) from environment.
*
* public final native java.lang.Class getClass();
*/
public void java_lang_Object_getClass(SootMethod method,
ReferenceVariable thisVar,
ReferenceVariable returnVar,
ReferenceVariable params[]) {
helper.assignObjectTo(returnVar, Environment.v().getClassObject());
}
/**
* Creates and returns a copy of this object. The precise meaning of
* "copy" may depend on the class of the object. The general intent
* is that, for any object x, the expression:
*
* x.clone() != x
*
* will be true, and that the expression:
*
* x.clone().getClass() == x.getClass()
*
* will be true, but these are not absolute requirements. While it is
* typically the case that:
*
* x.clone().equals(x)
*
* will be true, this is not an absolute requirement. Copying an
* object will typically entail creating a new instance of its
* class, but it also may require copying of internal data
* structures as well. No constructors are called.
*
* NOTE: it may raise an exception, the decision of cloning made by
* analysis by implementing the ReferneceVariable.cloneObject()
* method.
*
* protected native java.lang.Object clone()
* throws java.lang.CloneNotSupported
*/
public void java_lang_Object_clone(SootMethod method,
ReferenceVariable thisVar,
ReferenceVariable returnVar,
ReferenceVariable params[]) {
ReferenceVariable newVar = helper.cloneObject(thisVar);
helper.assign(returnVar, newVar);
}
/**
* Following methods have NO side effect
*
* private static native void registerNatives();
* public native int hashCode();
* public final native void notify();
* public final native void notifyAll();
* public final native void wait(long)
* throws java.lang.InterruptedException;
*/
}