Пример #1
0
  /**
   * Returns a non-array JVM object corresponding to the given non-array JPF object. If such an
   * object already exists, it is returned. Otherwise a new one is created.
   */
  protected Object getJVMNonArrObj(int JPFRef, MJIEnv env, FeatureExpr ctx)
      throws ConversionException {
    Object JVMObj = null;
    if (JPFRef != MJIEnv.NULL) {
      // First check if the object has been already created
      JVMObj = ConverterBase.objMapJPF2JVM.get(JPFRef);
      /**
       * If the object has not been created & the given JPF object is not NULL, the corresponding
       * JVM object is created from JPFRef
       */
      if (JVMObj == null) {
        // Used to store instance fields
        DynamicElementInfo dei = (DynamicElementInfo) env.getHeap().get(JPFRef);
        ClassInfo JPFCl = dei.getClassInfo();

        if (!JPFCl.isRegistered()) {
          JPFCl.registerClass(ctx, env.getThreadInfo());
        }

        // we treat Strings differently
        if (JPFCl.isStringClassInfo()) {
          JVMObj = createStringObject(JPFRef, env, ctx);
        } else {
          int JPFClsRef = JPFCl.getStaticElementInfo().getClassObjectRef();
          Class<?> JVMCl = this.getJVMCls(JPFClsRef, env, ctx);

          // There is only one instance of every class. There is no need to update
          // Class objects
          if (JVMCl == Class.class) {
            try {
              String name = env.getReferredClassInfo(ctx, JPFRef).getName();
              if (Utilities.isPrimitiveClass(name)) {
                JVMObj = Utilities.getPrimitiveClass(name);
              } else {
                JVMObj = loadClass(name, env, ctx);
              }
            } catch (ClassNotFoundException e) {
              e.printStackTrace();
            }
            return JVMObj;
          } else {
            // Creates a new instance of JVMCl
            JVMObj = instantiateFrom(JVMCl);
          }

          ConverterBase.objMapJPF2JVM.put(JPFRef, JVMObj);
          setInstanceFields(JVMObj, dei, env, ctx);
        }
      } else {
        // Need to update the JVM object fields
        DynamicElementInfo dei = (DynamicElementInfo) env.getHeap().get(JPFRef);
        updateInstanceFields(JVMObj, dei, env, ctx);
      }
    }
    return JVMObj;
  }
Пример #2
0
 /**
  * Returns a JVM object corresponding to the given JPF object. If such an object already exists,
  * it is returned. Otherwise a new one is created.
  */
 protected Object getJVMObj(int JPFRef, MJIEnv env, FeatureExpr ctx) throws ConversionException {
   if (env.isArray(JPFRef)) {
     return this.getJVMArrObj(JPFRef, env, ctx);
   } else {
     return this.getJVMNonArrObj(JPFRef, env, ctx);
   }
 }
Пример #3
0
  /**
   * Returns a new JVM Class object corresponding to the given JPF class. If such a Class object
   * already exists, it is returned. Otherwise a new one is created.
   */
  protected Class<?> getJVMCls(int JPFRef, MJIEnv env, FeatureExpr ctx) throws ConversionException {
    Class<?> JVMCls = null;
    if (JPFRef != MJIEnv.NULL) {
      // First check if the class object has been already created.
      JVMCls = ConverterBase.classMapJPF2JVM.get(JPFRef);

      /**
       * If the Class object has not been created & the given JPF class is not NULL, the
       * corresponding JVM class object is created from JPFRef
       */
      if (JVMCls == null) {
        ClassInfo ci = env.getReferredClassInfo(ctx, JPFRef);

        // Used to store static fields
        StaticElementInfo sei = ci.getStaticElementInfo();

        try {
          JVMCls = loadClass(sei.getClassInfo().getName(), env, ctx);
          ConverterBase.classMapJPF2JVM.put(JPFRef, JVMCls);
        } catch (ClassNotFoundException e) {
          throw new NoClassDefFoundError(sei.getClassInfo().getName());
        }

        assert (JVMCls.getName() != ci.getName());

        setStaticFields(JVMCls, sei, env, ctx);
      }
    }
    return JVMCls;
  }
Пример #4
0
 protected Class<?> loadClass(String cname, MJIEnv env, FeatureExpr ctx)
     throws ClassNotFoundException {
   if (Utilities.isArray(cname)) {
     return Class.forName(cname);
   } else {
     ClassLoader cl = env.getConfig().getClassLoader();
     return cl.loadClass(cname);
   }
 }
Пример #5
0
  public static Class<?> obtainJVMCls(int JPFRef, MJIEnv env, FeatureExpr ctx)
      throws ConversionException {
    if (JPFRef == MJIEnv.NULL) {
      return null;
    }

    ClassInfo ci = env.getReferredClassInfo(ctx, JPFRef);
    JPF2JVMConverter converter = ConverterBase.converterFactory.getJPF2JVMConverter(ci.getName());
    return converter.getJVMCls(JPFRef, env, ctx);
  }
  @MJI
  public void $init(MJIEnv env, int objref, FeatureExpr ctx) {
    ThreadInfo ti = env.getThreadInfo();
    StackFrame caller = ti.getCallerStackFrame();
    Instruction insn = caller.getPC().getValue();

    InsnExecCount a = insn.getAttr(InsnExecCount.class);
    if (a == null) {
      a = new InsnExecCount();
      insn.addAttr(a);
    }

    SystemState ss = env.getSystemState();
    if (!ss.hasRestorer(a)) {
      env.getSystemState().putRestorer(a, new InsnCountRestorer(a));
    }

    a.count++;
    env.setIntField(ctx, objref, "id", new One<>(a.count));
  }
Пример #7
0
  public static Object obtainJVMObj(int JPFRef, MJIEnv env, FeatureExpr ctx)
      throws ConversionException {
    if (JPFRef == MJIEnv.NULL) {
      return null;
    }

    DynamicElementInfo dei = (DynamicElementInfo) env.getHeap().get(JPFRef);
    ClassInfo ci = dei.getClassInfo();
    JPF2JVMConverter converter = ConverterBase.converterFactory.getJPF2JVMConverter(ci.getName());
    return converter.getJVMObj(JPFRef, env, ctx);
  }
Пример #8
0
  /**
   * Returns a JVM array corresponding to the given JPF array. If such an array already exists, it
   * is returned. Otherwise a new one is created.
   *
   * @param JPFRef an integer representing a JPF array
   * @return a JVM array corresponding to the given JPF array, JPFRef
   * @throws ConversionException if any incorrect input parameter is observed
   */
  protected Object getJVMArrObj(int JPFRef, MJIEnv env, FeatureExpr ctx)
      throws ConversionException {
    Object JVMArr = null;
    if (JPFRef != MJIEnv.NULL) {
      // First check if the array has been already created
      JVMArr = ConverterBase.objMapJPF2JVM.get(JPFRef);

      /**
       * If the array has not been created & the given JPF array is not NULL, the corresponding JVM
       * array is created from JPFRef
       */
      if (JVMArr == null) {
        // Used to store array elements
        DynamicElementInfo dei = (DynamicElementInfo) env.getHeap().get(JPFRef);

        // Array of primitive type
        if (dei.getClassInfo().getComponentClassInfo().isPrimitive()) {
          JVMArr = Utilities.createJVMPrimitiveArr(dei);
        }
        // Array of Non-primitives
        else {
          //          int[] JPFArr = ((ReferenceArrayFields) dei.getFields()).asReferenceArray();
          Conditional<Integer>[] JPFArrConditional =
              ((ReferenceArrayFields) dei.getFields()).asReferenceArray();
          int[] JPFArr = new int[JPFArrConditional.length];
          for (int i = 0; i < JPFArrConditional.length; i++) {
            JPFArr[i] = JPFArrConditional[i].getValue();
          }

          int arrSize = JPFArr.length;

          Class<?> compType = null;
          try {
            compType = loadClass(dei.getClassInfo().getComponentClassInfo().getName(), env, ctx);
          } catch (ClassNotFoundException e) {
            e.printStackTrace();
          }

          Object[] arrObj = (Object[]) Array.newInstance(compType, arrSize);

          for (int i = 0; i < arrSize; i++) {
            arrObj[i] = obtainJVMObj(JPFArr[i], env, ctx);
          }
          JVMArr = arrObj;
        }
        ConverterBase.objMapJPF2JVM.put(JPFRef, JVMArr);
      }
    }
    return JVMArr;
  }
Пример #9
0
  protected Object createStringObject(int JPFRef, MJIEnv env, FeatureExpr ctx)
      throws ConversionException {
    DynamicElementInfo str = (DynamicElementInfo) env.getHeap().get(JPFRef);
    if (!str.getClassInfo().isStringClassInfo()) {
      throw new ConversionException();
    }

    FieldInfo fi = str.getFieldInfo("value");
    int fieldValueRef = str.getFields().getReferenceValue(fi.getStorageOffset()).getValue();

    // this is String.value which is of type of char[]
    Object value = this.getJVMObj(fieldValueRef, env, ctx);
    // In case that value is of the type One
    Object JVMObj;
    if (value instanceof Conditional)
      JVMObj = new String((char[]) ((Conditional<?>) value).simplify(ctx).getValue());
    else {
      System.out.println("Warning from JPF2JVMConverter.java L244, JVMObj is not One");
      JVMObj = new String((char[]) value);
    }
    ConverterBase.objMapJPF2JVM.put(JPFRef, JVMObj);
    return JVMObj;
  }