145 lines
5.0 KiB
Java
145 lines
5.0 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002 - 2006 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.core.tests.ir;
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import java.io.IOException;
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import java.util.Iterator;
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import org.junit.Assert;
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import org.junit.Test;
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import com.ibm.wala.classLoader.IMethod;
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import com.ibm.wala.core.tests.util.WalaTestCase;
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import com.ibm.wala.ipa.callgraph.AnalysisOptions;
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import com.ibm.wala.ipa.callgraph.AnalysisScope;
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import com.ibm.wala.ipa.callgraph.IAnalysisCacheView;
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import com.ibm.wala.ipa.callgraph.impl.Everywhere;
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import com.ibm.wala.ipa.cha.ClassHierarchyException;
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import com.ibm.wala.ipa.cha.IClassHierarchy;
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import com.ibm.wala.ssa.IR;
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import com.ibm.wala.ssa.SSAInstruction;
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import com.ibm.wala.types.MethodReference;
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import com.ibm.wala.util.graph.GraphIntegrity;
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import com.ibm.wala.util.graph.GraphIntegrity.UnsoundGraphException;
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import com.ibm.wala.util.strings.Atom;
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import com.ibm.wala.util.strings.ImmutableByteArray;
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import com.ibm.wala.util.strings.UTF8Convert;
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/**
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* Test that the SSA-numbering of variables in the IR is deterministic.
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*
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* Introduced 05-AUG-03; the default implementation of hashCode was being invoked. Object.hashCode is a source of random numbers and
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* has no place in a deterministic program.
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*/
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public class DeterministicIRTest extends WalaTestCase {
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private IClassHierarchy cha;
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private final AnalysisOptions options = new AnalysisOptions();
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protected DeterministicIRTest(IClassHierarchy cha) {
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this.cha = cha;
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}
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public DeterministicIRTest() throws ClassHierarchyException, IOException {
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this(WalaTestCase.makeCHA());
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}
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public static void main(String[] args) {
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justThisTest(DeterministicIRTest.class);
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}
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/**
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* @param method
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*/
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private IR doMethod(MethodReference method) {
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IAnalysisCacheView cache = makeAnalysisCache();
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Assert.assertNotNull("method not found", method);
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IMethod imethod = cha.resolveMethod(method);
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Assert.assertNotNull("imethod not found", imethod);
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IR ir1 = cache.getIRFactory().makeIR(imethod, Everywhere.EVERYWHERE, options.getSSAOptions());
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cache.clear();
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checkNotAllNull(ir1.getInstructions());
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checkNoneNull(ir1.iterateAllInstructions());
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try {
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GraphIntegrity.check(ir1.getControlFlowGraph());
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} catch (UnsoundGraphException e) {
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System.err.println(ir1);
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e.printStackTrace();
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Assert.assertTrue("unsound CFG for ir1", false);
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}
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IR ir2 = cache.getIRFactory().makeIR(imethod, Everywhere.EVERYWHERE, options.getSSAOptions());
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cache.clear();
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try {
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GraphIntegrity.check(ir2.getControlFlowGraph());
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} catch (UnsoundGraphException e1) {
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System.err.println(ir2);
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e1.printStackTrace();
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Assert.assertTrue("unsound CFG for ir2", false);
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}
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Assert.assertEquals(ir1.toString(), ir2.toString());
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return ir1;
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}
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// The Tests ///////////////////////////////////////////////////////
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/**
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* @param iterator
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*/
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private static void checkNoneNull(Iterator<?> iterator) {
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while (iterator.hasNext()) {
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Assert.assertTrue(iterator.next() != null);
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}
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}
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/**
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* @param instructions
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*/
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private static void checkNotAllNull(SSAInstruction[] instructions) {
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for (SSAInstruction instruction : instructions) {
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if (instruction != null) {
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return;
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}
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}
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Assert.assertTrue("no instructions generated", false);
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}
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@Test public void testIR1() {
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// 'remove' is a nice short method
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doMethod(cha.getScope().findMethod(AnalysisScope.APPLICATION, "Ljava/util/HashMap", Atom.findOrCreateUnicodeAtom("remove"),
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new ImmutableByteArray(UTF8Convert.toUTF8("(Ljava/lang/Object;)Ljava/lang/Object;"))));
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}
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@Test public void testIR2() {
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// 'equals' is a nice medium-sized method
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doMethod(cha.getScope().findMethod(AnalysisScope.APPLICATION, "Ljava/lang/String", Atom.findOrCreateUnicodeAtom("equals"),
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new ImmutableByteArray(UTF8Convert.toUTF8("(Ljava/lang/Object;)Z"))));
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}
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@Test public void testIR3() {
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// 'resolveProxyClass' is a nice long method (at least in Sun libs)
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doMethod(cha.getScope().findMethod(AnalysisScope.APPLICATION, "Ljava/io/ObjectInputStream", Atom
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.findOrCreateUnicodeAtom("resolveProxyClass"), new ImmutableByteArray(UTF8Convert
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.toUTF8("([Ljava/lang/String;)Ljava/lang/Class;"))));
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}
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@Test public void testIR4() {
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// test some corner cases with try-finally
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doMethod(cha.getScope().findMethod(AnalysisScope.APPLICATION, "LcornerCases/TryFinally", Atom.findOrCreateUnicodeAtom("test1"),
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new ImmutableByteArray(UTF8Convert.toUTF8("(Ljava/io/InputStream;Ljava/io/InputStream;)V"))));
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}
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}
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