qilin.core.natives.JavaLangSystemArraycopyNative 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.core.natives;
import qilin.util.PTAUtils;
import sootup.core.jimple.basic.Local;
import sootup.core.jimple.basic.StmtPositionInfo;
import sootup.core.jimple.basic.Value;
import sootup.core.jimple.common.ref.JArrayRef;
import sootup.core.jimple.common.stmt.JReturnVoidStmt;
import sootup.core.model.SootMethod;
import sootup.core.types.ArrayType;
import sootup.core.types.ClassType;
import sootup.core.views.View;
/*
* This file will be temporarily discarded. Yes, it is correct but need one more level of context.
* Thus it will make qilin.spark less precise than its counterpart in Doop.
* */
public class JavaLangSystemArraycopyNative extends NativeMethod {
public JavaLangSystemArraycopyNative(View view, SootMethod method) {
super(view, method);
}
/**
* never make a[] = b[], it violates the principle of jimple statement. make a temporary variable.
*/
protected void simulateImpl() {
// Value srcArr = getPara(0);
// Value dstArr = getPara(2);
ClassType objType = PTAUtils.getClassType("java.lang.Object");
Value srcArr = getPara(0, new ArrayType(objType, 1));
Value dstArr = getPara(2, new ArrayType(objType, 1));
Value src = getArrayRef(srcArr);
JArrayRef dst = getArrayRef(dstArr);
Local temp = getNextLocal(objType);
addAssign(temp, src);
addAssign(dst, temp);
final JReturnVoidStmt returnStmt =
new JReturnVoidStmt(StmtPositionInfo.getNoStmtPositionInfo());
stmtList.add(returnStmt);
}
}