예제 #1
0
  private byte[] modifiyClass(byte[] classfile, String name) {

    ClassParser parser = new ClassParser(new ByteArrayInputStream(classfile), "");
    try {
      JavaClass cls = parser.parse();

      for (JavaClassModifier modifier :
          ConfigurationLoader.getInstance().getJavaClassModifierList()) {
        modifier.modify(cls);
      }

      ByteArrayOutputStream out = new ByteArrayOutputStream();
      cls.dump(out);

      return out.toByteArray();
    } catch (Exception e) {
      throw new RuntimeException("Error while modifying class '" + name + "'", e);
    }
  }
예제 #2
0
  /**
   * Given another class, return a transformed version of the class which replaces specified calls
   * with alternative static implementations
   */
  public byte[] transform(
      ClassLoader loader,
      String className,
      Class<?> classBeingRedefined,
      ProtectionDomain protectionDomain,
      byte[] classfileBuffer)
      throws IllegalClassFormatException {

    // debug = className.equals ("chicory/Test");

    String fullClassName = className.replace("/", ".");

    debug_transform.log("In Transform: class = %s%n", className);

    // Don't instrument boot classes.  We only want to instrument
    // user classes classpath.
    // Most boot classes have the null loader,
    // but some generated classes (such as those in sun.reflect) will
    // have a non-null loader.  Some of these have a null parent loader,
    // but some do not.  The check for the sun.reflect package is a hack
    // to catch all of these.  A more consistent mechanism to determine
    // boot classes would be preferrable.
    if (loader == null) {
      debug_transform.log("ignoring system class %s, class loader == null", fullClassName);
      return (null);
    } else if (loader.getParent() == null) {
      debug_transform.log("ignoring system class %s, parent loader == null\n", fullClassName);
      return (null);
    } else if (fullClassName.startsWith("sun.reflect")) {
      debug_transform.log("ignoring system class %s, in sun.reflect package", fullClassName);
      return (null);
    } else if (fullClassName.startsWith("com.sun")) {
      System.out.printf("Class from com.sun package %s with nonnull loaders\n", fullClassName);
    }

    // Don't intrument our code
    if (className.startsWith("randoop.")) {
      debug_transform.log("Not considering randoop class %s%n", fullClassName);
      return (null);
    }

    // Look for match with specified regular expressions for class
    method_map = null;
    debug_class = false;
    for (MethodMapInfo mmi : map_list) {
      if (mmi.class_regex.matcher(className).matches()) {
        if (false && className.startsWith("RandoopTest")) debug_class = true;
        if (debug_class)
          System.out.printf("Classname %s matches re %s%n", className, mmi.class_regex);
        method_map = mmi.map;
        break;
      }
    }
    if (method_map == null) return null;

    debug_transform.log(
        "transforming class %s, loader %s - %s%n", className, loader, loader.getParent());

    // Parse the bytes of the classfile, die on any errors
    JavaClass c = null;
    ClassParser parser = new ClassParser(new ByteArrayInputStream(classfileBuffer), className);
    try {
      c = parser.parse();
    } catch (Exception e) {
      throw new RuntimeException("Unexpected error", e);
    }

    try {
      // Get the class information
      ClassGen cg = new ClassGen(c);
      ifact = new InstructionFactory(cg);

      map_calls(cg, className, loader);

      JavaClass njc = cg.getJavaClass();
      if (debug) njc.dump("/tmp/ret/" + njc.getClassName() + ".class");

      if (true) {
        return (cg.getJavaClass().getBytes());
      } else {
        debug_transform.log("not including class %s (filtered out)", className);
        return null;
      }

    } catch (Throwable e) {
      out.format("Unexpected error %s in transform", e);
      e.printStackTrace();
      return (null);
    }
  }