code: // from gee.cs.oswego.edu/home/jsr166/jsr166
  
  package jsr166tests.jtreg.util.concurrent.Executors;
  
  /*
   * Copyright (c) 2007 Sun Microsystems, Inc.  All Rights Reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
   *
   * This code 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 General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
   * CA 95054 USA or visit www.sun.com if you need additional information or
   * have any questions.
   */
  
  /*
   * @test
   * @bug 6552961 6558429
   * @summary Test privilegedCallable, privilegedCallableUsingCurrentClassLoader
   * @run main/othervm PrivilegedCallables
   * @author Martin Buchholz
   */
  
  import java.util.concurrent.*;
  import java.util.*;
  import java.security.*;
  import static java.util.concurrent.Executors.*;
  
  public class PrivilegedCallables {
      Callable<Integer> real;
  
      final Callable<Integer> realCaller = new Callable<Integer>() {
          public Integer call() throws Exception {
              return real.call(); }};
  
      final Random rnd = new Random();
  
      @SuppressWarnings("serial") Throwable[] throwables = {
          new Exception() {},
          new RuntimeException() {},
          new Error() {}
      };
      Throwable randomThrowable() {
          return throwables[rnd.nextInt(throwables.length)];
      }
  
      //----------------------------------------------------------------
      // A Policy class designed to make permissions fiddling very easy.
      //----------------------------------------------------------------
      static class Policy extends java.security.Policy {
          private Permissions perms;
  
          public void setPermissions(Permission...permissions) {
              perms = new Permissions();
              for (Permission permission : permissions)
                  perms.add(permission);
          }
  
          public Policy() { setPermissions(/* Nothing */); }
  
          public PermissionCollection getPermissions(CodeSource cs) {
              return perms;
          }
  
          public PermissionCollection getPermissions(ProtectionDomain pd) {
              return perms;
          }
  
          public boolean implies(ProtectionDomain pd, Permission p) {
              return perms.implies(p);
          }
  
          public void refresh() {}
      }
  
      void test(String[] args) {
          testPrivileged();
  
          final Policy policy = new Policy();
          Policy.setPolicy(policy);
          policy.setPermissions(new RuntimePermission("getClassLoader"),
                                new RuntimePermission("setContextClassLoader"),
                                new RuntimePermission("stopThread"));
          System.setSecurityManager(new SecurityManager());
  
          testPrivileged();
  
          policy.setPermissions(/* Nothing */);
  
          THROWS(AccessControlException.class,
                 new F() {void f(){ privilegedCallableUsingCurrentClassLoader(realCaller); }},
                 new F() {void f(){ privilegedThreadFactory(); }});
  
          policy.setPermissions(new RuntimePermission("setSecurityManager"));
          System.setSecurityManager(null);
      }
  
      void testPrivileged() {
          try { test(privilegedCallable(realCaller)); }
          catch (Throwable t) { unexpected(t); }
  
          try { test(privilegedCallableUsingCurrentClassLoader(realCaller)); }
          catch (Throwable t) { unexpected(t); }
  
          try { privilegedThreadFactory(); }
          catch (Throwable t) { unexpected(t); }
      }
  
      void test(final Callable<Integer> c) throws Throwable {
          for (int i = 0; i < 20; i++)
              if (rnd.nextBoolean()) {
                  final Throwable t = randomThrowable();
                  real = new Callable<Integer>() {
                      @SuppressWarnings("deprecation")
                      public Integer call() throws Exception {
                          Thread.currentThread().stop(t);
                          return null; }};
                  try {
                      c.call();
                      fail("Expected exception not thrown");
                  } catch (Throwable tt) { check(t == tt); }
              } else {
                  final int n = rnd.nextInt();
                  real = new Callable<Integer>() {
                      public Integer call() { return n; }};
                  equal(c.call(), n);
              }
      }
  
      //--------------------- Infrastructure ---------------------------
      volatile int passed = 0, failed = 0;
      void pass() {passed++;}
      void fail() {failed++; Thread.dumpStack();}
      void fail(String msg) {System.err.println(msg); fail();}
      void unexpected(Throwable t) {failed++; t.printStackTrace();}
      void check(boolean cond) {if (cond) pass(); else fail();}
      void equal(Object x, Object y) {
          if (x == null ? y == null : x.equals(y)) pass();
          else fail(x + " not equal to " + y);}
      public static void main(String[] args) throws Throwable {
          new PrivilegedCallables().instanceMain(args);}
      void instanceMain(String[] args) throws Throwable {
          try {test(args);} catch (Throwable t) {unexpected(t);}
          System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
          if (failed > 0) throw new AssertionError("Some tests failed");}
      abstract class F {abstract void f() throws Throwable;}
      void THROWS(Class<? extends Throwable> k, F... fs) {
          for (F f : fs)
              try {f.f(); fail("Expected " + k.getName() + " not thrown");}
              catch (Throwable t) {
                  if (k.isAssignableFrom(t.getClass())) pass();
                  else unexpected(t);}}
  }
  