217 lines
8.3 KiB
Java
217 lines
8.3 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.util.Iterator;
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import com.ibm.wala.classLoader.ClassLoaderFactory;
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import com.ibm.wala.classLoader.ClassLoaderFactoryImpl;
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import com.ibm.wala.classLoader.IMethod;
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import com.ibm.wala.core.tests.util.TestConstants;
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import com.ibm.wala.core.tests.util.WalaTestCase;
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import com.ibm.wala.emf.wrappers.EMFScopeWrapper;
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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.impl.Everywhere;
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import com.ibm.wala.ipa.cha.ClassHierarchy;
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import com.ibm.wala.ipa.cha.ClassHierarchyException;
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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.Atom;
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import com.ibm.wala.util.ImmutableByteArray;
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import com.ibm.wala.util.UTF8Convert;
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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.warnings.WarningSet;
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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
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* invoked. Object.hashCode is a source of random numbers and has no place in a
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* deterministic program.
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*/
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public class DeterministicIRTest extends WalaTestCase {
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private static final ClassLoader MY_CLASSLOADER = DeterministicIRTest.class.getClassLoader();
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private WarningSet warnings;
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private AnalysisScope scope;
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private ClassHierarchy cha;
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private AnalysisOptions options;
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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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* (non-Javadoc)
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*
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* @see junit.framework.TestCase#setUp()
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*/
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protected void setUp() throws Exception {
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warnings = new WarningSet();
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scope = new EMFScopeWrapper(TestConstants.WALA_TESTDATA, "J2SEClassHierarchyExclusions.xml", MY_CLASSLOADER);
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options = new AnalysisOptions(scope, null);
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ClassLoaderFactory factory = new ClassLoaderFactoryImpl(scope.getExclusions(), warnings);
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warnings = new WarningSet();
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try {
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cha = ClassHierarchy.make(scope, factory, warnings);
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} catch (ClassHierarchyException e) {
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throw new Exception();
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}
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}
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/*
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* (non-Javadoc)
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*
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* @see junit.framework.TestCase#tearDown()
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*/
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protected void tearDown() throws Exception {
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warnings = null;
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scope = null;
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cha = null;
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super.tearDown();
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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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assertNotNull("method not found", method);
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IMethod imethod = cha.resolveMethod(method);
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assertNotNull("imethod not found", imethod);
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IR ir1 = options.getIRFactory().makeIR(imethod, Everywhere.EVERYWHERE, cha, options.getSSAOptions(), warnings);
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options.getSSACache().wipe();
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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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assertTrue("unsound CFG for ir1", false);
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}
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IR ir2 = options.getIRFactory().makeIR(imethod, Everywhere.EVERYWHERE, cha, options.getSSAOptions(), warnings);
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options.getSSACache().wipe();
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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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assertTrue("unsound CFG for ir2", false);
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}
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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 void checkNoneNull(Iterator<?> iterator) {
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while (iterator.hasNext()) {
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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 (int i = 0; i < instructions.length; i++) {
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if (instructions[i] != null) {
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return;
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}
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}
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assertTrue("no instructions generated", false);
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}
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public void testIR1() {
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// 'remove' is a nice short method
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doMethod(scope.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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public void testIR2() {
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// 'equals' is a nice medium-sized method
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doMethod(scope.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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public void testIR3() {
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// 'resolveProxyClass' is a nice long method (at least in Sun libs)
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doMethod(scope.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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public void testLocalNamesWithoutPiNodes() {
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boolean save = options.getSSAOptions().getUsePiNodes();
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options.getSSAOptions().setUsePiNodes( false );
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IR ir = doMethod(scope.findMethod(AnalysisScope.APPLICATION, "LcornerCases/Locals", Atom.findOrCreateUnicodeAtom("foo"),
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new ImmutableByteArray(UTF8Convert.toUTF8("([Ljava/lang/String;)V"))));
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options.getSSAOptions().setUsePiNodes( save );
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// v1 should be the parameter "a" at pc 0
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String[] names = ir.getLocalNames(0,1);
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assertTrue("failed local name resolution for v1@0" , names != null);
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assertTrue("incorrect number of local names for v1@0: " + names.length , names.length == 1);
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assertTrue("incorrect local name resolution for v1@0: " + names[0], names[0].equals("a"));
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// v2 is a compiler-induced temporary
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assertTrue("didn't expect name for v2 at pc 2" , ir.getLocalNames(2,2) == null);
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// at pc 5, v1 should represent the locals "a" and "b"
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names = ir.getLocalNames(5,1);
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assertTrue("failed local name resolution for v1@5" , names != null);
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assertTrue("incorrect number of local names for v1@5: " + names.length , names.length == 2);
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assertTrue("incorrect local name resolution #0 for v1@5: " + names[0], names[0].equals("a"));
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assertTrue("incorrect local name resolution #1 for v1@5: " + names[1], names[1].equals("b"));
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}
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public void testLocalNamesWithPiNodes() {
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boolean save = options.getSSAOptions().getUsePiNodes();
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options.getSSAOptions().setUsePiNodes( true );
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IR ir = doMethod(scope.findMethod(AnalysisScope.APPLICATION, "LcornerCases/Locals", Atom.findOrCreateUnicodeAtom("foo"),
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new ImmutableByteArray(UTF8Convert.toUTF8("([Ljava/lang/String;)V"))));
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options.getSSAOptions().setUsePiNodes( save );
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// v1 should be the parameter "a" at pc 0
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String[] names = ir.getLocalNames(0,1);
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assertTrue("failed local name resolution for v1@0" , names != null);
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assertTrue("incorrect number of local names for v1@0: " + names.length , names.length == 1);
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assertTrue("incorrect local name resolution for v1@0: " + names[0], names[0].equals("a"));
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// v2 is a compiler-induced temporary
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assertTrue("didn't expect name for v2 at pc 2" , ir.getLocalNames(2,2) == null);
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// at pc 5, v1 should represent the locals "a" and "b"
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names = ir.getLocalNames(5,1);
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assertTrue("failed local name resolution for v1@5" , names != null);
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assertTrue("incorrect number of local names for v1@5: " + names.length , names.length == 2);
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assertTrue("incorrect local name resolution #0 for v1@5: " + names[0], names[0].equals("a"));
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assertTrue("incorrect local name resolution #1 for v1@5: " + names[1], names[1].equals("b"));
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}
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}
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