63 lines
2.1 KiB
Java
63 lines
2.1 KiB
Java
/*******************************************************************************
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* Copyright (c) 2007 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.analysis.exceptionanalysis;
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import com.ibm.wala.ipa.callgraph.CGNode;
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import com.ibm.wala.ipa.cfg.EdgeFilter;
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import com.ibm.wala.ssa.ISSABasicBlock;
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import com.ibm.wala.ssa.SSAInstruction;
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/**
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* Converter to use the results of the exception analysis with an edge filter.
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*
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* @author Stephan Gocht {@code <stephan@gobro.de>}
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*
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*/
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public class ExceptionAnalysis2EdgeFilter implements EdgeFilter<ISSABasicBlock> {
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private ExceptionAnalysis analysis;
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private CGNode node;
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public ExceptionAnalysis2EdgeFilter(ExceptionAnalysis analysis, CGNode node) {
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this.analysis = analysis;
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this.node = node;
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}
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@Override
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public boolean hasNormalEdge(ISSABasicBlock src, ISSABasicBlock dst) {
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boolean originalEdge = node.getIR().getControlFlowGraph().getNormalSuccessors(src).contains(dst);
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boolean result = originalEdge;
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SSAInstruction instruction = IntraproceduralExceptionAnalysis.getThrowingInstruction(src);
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if (instruction != null) {
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if (analysis.getFilter().getFilter(node).alwaysThrowsException(instruction)) {
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result = false;
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}
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}
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return result;
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}
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@Override
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public boolean hasExceptionalEdge(ISSABasicBlock src, ISSABasicBlock dst) {
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boolean originalEdge = node.getIR().getControlFlowGraph().getExceptionalSuccessors(src).contains(dst);
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boolean result = originalEdge;
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if (dst.isCatchBlock()) {
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if (!analysis.catchesException(node, src, dst)) {
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result = false;
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}
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} else {
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assert dst.isExitBlock();
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result = analysis.hasUncaughtExceptions(node, src);
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}
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return result;
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}
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}
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