/*
* Bytecode Analysis Framework
* Copyright (C) 2005, University of Maryland
*
* 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
*/
package edu.umd.cs.findbugs.ba.ca;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.apache.bcel.generic.ConstantPoolGen;
import org.apache.bcel.generic.Instruction;
import org.apache.bcel.generic.InstructionHandle;
import org.apache.bcel.generic.InvokeInstruction;
import edu.umd.cs.findbugs.ba.AbstractDataflowAnalysis;
import edu.umd.cs.findbugs.ba.BasicBlock;
import edu.umd.cs.findbugs.ba.BlockOrder;
import edu.umd.cs.findbugs.ba.CFG;
import edu.umd.cs.findbugs.ba.DataflowAnalysisException;
import edu.umd.cs.findbugs.ba.DepthFirstSearch;
import edu.umd.cs.findbugs.ba.Edge;
import edu.umd.cs.findbugs.ba.Location;
import edu.umd.cs.findbugs.ba.ReversePostOrder;
public class CallListAnalysis extends AbstractDataflowAnalysis<CallList> {
private final DepthFirstSearch dfs;
// private ConstantPoolGen cpg;
private final Map<InstructionHandle, Call> callMap;
public CallListAnalysis(CFG cfg, DepthFirstSearch dfs, ConstantPoolGen cpg) {
this.dfs = dfs;
// this.cpg = cpg;
this.callMap = buildCallMap(cfg, cpg);
}
private static Map<InstructionHandle, Call> buildCallMap(CFG cfg, ConstantPoolGen cpg) {
Map<InstructionHandle, Call> callMap = new HashMap<InstructionHandle, Call>();
for (Iterator<Location> i = cfg.locationIterator(); i.hasNext();) {
InstructionHandle handle = i.next().getHandle();
Instruction ins = handle.getInstruction();
if (ins instanceof InvokeInstruction) {
InvokeInstruction inv = (InvokeInstruction) ins;
Call call = new Call(inv.getClassName(cpg), inv.getName(cpg), inv.getSignature(cpg));
callMap.put(handle, call);
}
}
return callMap;
}
@Override
public void initEntryFact(CallList fact) {
fact.clear();
}
// public void initResultFact(CallList fact) {
// fact.setTop();
// }
@Override
public boolean isForwards() {
return true;
}
@Override
public BlockOrder getBlockOrder(CFG cfg) {
return new ReversePostOrder(cfg, dfs);
}
@Override
public void makeFactTop(CallList fact) {
fact.setTop();
}
@Override
public boolean isTop(CallList fact) {
return fact.isTop();
}
@Override
public CallList createFact() {
return new CallList();
}
@Override
public boolean same(CallList a, CallList b) {
return a.equals(b);
}
@Override
public void meetInto(CallList start, Edge edge, CallList result) throws DataflowAnalysisException {
CallList merge = CallList.merge(start, result);
result.copyFrom(merge);
}
@Override
public void copy(CallList source, CallList dest) {
dest.copyFrom(source);
}
@Override
public void transferInstruction(InstructionHandle handle, BasicBlock basicBlock, CallList fact)
throws DataflowAnalysisException {
Call call = callMap.get(handle);
if (call != null) {
fact.add(call);
}
}
@Override
public boolean isFactValid(CallList fact) {
return fact.isValid();
}
// public static void main(String[] argv) throws Exception {
// if (argv.length != 1) {
// System.err.println("Usage: " + CallListAnalysis.class.getName() +
// " <class file>");
// System.exit(1);
// }
//
// DataflowTestDriver<CallList, CallListAnalysis> driver =
// new DataflowTestDriver<CallList, CallListAnalysis>() {
// @Override
// public Dataflow<CallList, CallListAnalysis> createDataflow(
// ClassContext classContext,
// Method method) throws CFGBuilderException, DataflowAnalysisException {
// CallListAnalysis analysis = new CallListAnalysis(
// classContext.getCFG(method),
// classContext.getDepthFirstSearch(method),
// classContext.getConstantPoolGen());
// Dataflow<CallList, CallListAnalysis> dataflow =
// new Dataflow<CallList, CallListAnalysis>(analysis.cfg, analysis);
//
// dataflow.execute();
//
// return dataflow;
// }
// };
//
// driver.execute(argv[0]);
// }
}