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JimpleStore.java

package edu.ksu.cis.bandera.birc;

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Bandera, a Java(TM) analysis and transformation toolkit           *
 * Copyright (C) 1998, 1999   James Corbett (corbett@hawaii.edu)     *
 * All rights reserved.                                              *
 *                                                                   *
 * This work was done as a project in the SAnToS Laboratory,         *
 * Department of Computing and Information Sciences, Kansas State    *
 * University, USA (http://www.cis.ksu.edu/santos).                  *
 * It is understood that any modification not identified as such is  *
 * not covered by the preceding statement.                           *
 *                                                                   *
 * This work is free software; you can redistribute it and/or        *
 * modify it under the terms of the GNU Library General Public       *
 * License as published by the Free Software Foundation; either      *
 * version 2 of the License, or (at your option) any later version.  *
 *                                                                   *
 * This work 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 *
 * Library General Public License for more details.                  *
 *                                                                   *
 * You should have received a copy of the GNU Library General Public *
 * License along with this toolkit; if not, write to the             *
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,      *
 * Boston, MA  02111-1307, USA.                                      *
 *                                                                   *
 * Java is a trademark of Sun Microsystems, Inc.                     *
 *                                                                   *
 * To submit a bug report, send a comment, or get the latest news on *
 * this project and other SAnToS projects, please visit the web-site *
 *                http://www.cis.ksu.edu/santos                      *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
import ca.mcgill.sable.soot.SootField;
import ca.mcgill.sable.soot.SootMethod;
import ca.mcgill.sable.soot.SootClass;
import ca.mcgill.sable.soot.jimple.Local;

import edu.ksu.cis.bandera.bir.*;

import java.util.*;

/**
 * A Jimple store (encode the values of the variables at a given state)
 */

public class JimpleStore implements BirConstants {

    Vector variables = new Vector();  // Variables (Local or SootField)
    Hashtable values =      // Map variable --> JimpleLiteral
    new Hashtable();
    JimpleLiteralPrinter printer;
    String output;
    TransSystem system;
    BirState state;
 
    JimpleStore(BirState state) { 
    this.state = state;
    this.output = state.getOutput();
    this.system = state.getSystem();

    // For each state variable, translate the BIR value of 
    // that variable into a Jimple literal and store it
    // with the Jimple variable that the state variable represents.
    JimpleStoreBuilder builder = new JimpleStoreBuilder(state);
    StateVarVector vars = system.getStateVars();
    for (int i = 0; i < vars.size(); i++) {
        StateVar var = vars.elementAt(i);
        if (! var.getType().isKind(COLLECTION)) {
        Object jvar = system.getSource(var);
        variables.addElement(jvar);
        var.getType().apply(builder,var);
        JimpleLiteral jvalue = (JimpleLiteral) builder.getResult();
        values.put(jvar,jvalue);
        }
    }
    }
    /**
     * Get value of Jimple local variable
     * @param method Soot method containing local
     * @param local Local representing variable
     */

    public JimpleLiteral getLocalValue(SootMethod method, Local local) {
    String key = ExprExtractor.localKey(method,local);
    return (JimpleLiteral) values.get(key);
    }
    /**
     * Get output at state (this is a String containing the concatenation
     * of all Bandera.print() statements up to this point in the trace).
     */

    public String getOuput() {
    return output;
    }
    /**
     * Get value of Jimple static field
     * @param Soot field (must be static)
     */

    public JimpleLiteral getStaticFieldValue(SootField field) {
    return (JimpleLiteral) values.get(field);
    }
    /**
     * Get Vector of SootMethods representing threads
     */

    public Vector getThreads() {
    Vector methods = new Vector();
    ThreadVector threads = system.getThreads();
    for (int i = 0; i < threads.size(); i++) {
        BirThread thread = threads.elementAt(i);
        SootMethod method = (SootMethod) system.getSource(thread);
        methods.addElement(method);
    }
    return methods;
    }
    /**
     * Is thread active?
     * @param method Soot method representing thread body
     */

    public boolean isActive(SootMethod method) {
    BirThread thread = system.threadOfKey(method);
    if (thread == null)
        throw new RuntimeException("Thread not found for: " + method);
    return state.isActive(thread);
    }
    /**
     * Print store
     */

    public void print() {
    printer = new JimpleLiteralPrinter("  ");
    System.out.println("Jimple Store:");
    Vector threadMethods = getThreads();
    for (int i = 0; i < threadMethods.size(); i++) {
        SootMethod method = (SootMethod)threadMethods.elementAt(i);
        if (isActive(method))
        System.out.println("  Thread " + 
                   method.getDeclaringClass().getName());
    }
    for (int i = 0; i < variables.size(); i++) {
        System.out.print("  " + variables.elementAt(i) + " = ");
        JimpleLiteral value = 
        (JimpleLiteral) values.get(variables.elementAt(i));
        value.apply(printer);
        System.out.println();
    }
    printer.flush();
    }
}

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