qilin.parm.ctxcons.HybObjCtxConstructor Maven / Gradle / Ivy
/* Qilin - a Java Pointer Analysis Framework
* Copyright (C) 2021-2030 Qilin developers
*
* 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 3.0 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
* .
*/
package qilin.parm.ctxcons;
import qilin.core.context.Context;
import qilin.core.context.ContextElement;
import qilin.core.context.ContextElements;
import qilin.core.pag.CallSite;
import qilin.core.pag.ContextAllocNode;
import qilin.core.pag.ContextMethod;
import sootup.core.model.SootMethod;
// implementation of selective hybrid context...(Yannis pldi'13)
public class HybObjCtxConstructor implements CtxConstructor {
/*
* Support Sb-1obj, S-2obj+H, ...
* */
@Override
public Context constructCtx(
ContextMethod caller, ContextAllocNode receiverNode, CallSite callSite, SootMethod target) {
Context callerContext = caller.context();
if (receiverNode == null) { // static invoke
assert callerContext instanceof ContextElements;
ContextElements callerCtx = (ContextElements) callerContext;
ContextElement[] cxtAllocs = callerCtx.getElements();
int s = callerCtx.size();
ContextElement[] array;
if (s >= 1) {
array = new ContextElement[s + 1];
array[1] = callSite;
array[0] = cxtAllocs[0];
if (s > 1) {
System.arraycopy(cxtAllocs, 1, array, 2, s - 1);
}
return new ContextElements(array, s + 1);
} else {
array = new ContextElement[2];
array[1] = callSite;
array[0] = null;
return new ContextElements(array, 2);
}
} else {
Context context = receiverNode.context();
assert context instanceof ContextElements;
ContextElements ctx = (ContextElements) context;
int s = ctx.size();
ContextElement[] cxtAllocs = ctx.getElements();
ContextElement[] array = new ContextElement[s + 1];
array[0] = receiverNode.base();
System.arraycopy(cxtAllocs, 0, array, 1, s);
return new ContextElements(array, s + 1);
}
}
}