jdk8-mips64-public/hotspot: test/compiler/jsr292/ConcurrentClassLoadingTest.java@2bac854670c0 (annotated)

test/compiler/jsr292/ConcurrentClassLoadingTest.java@2bac854670c0 (annotated)

test/compiler/jsr292/ConcurrentClassLoadingTest.java

Wed, 22 Jan 2014 12:37:28 -0800

author: katleman
date: Wed, 22 Jan 2014 12:37:28 -0800
changeset 6575: 2bac854670c0
parent 6185: 68ec0a75ee22
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Added tag jdk8u5-b05 for changeset b90de55aca30

 /*
  * Copyright (c) 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /**
  * @test
  * @bug 8022595
  * @summary JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
  *
  * @run main/othervm ConcurrentClassLoadingTest
  */
 import java.util.*;
 import java.util.concurrent.BrokenBarrierException;
 import java.util.concurrent.CyclicBarrier;
 public class ConcurrentClassLoadingTest {
     int numThreads = 0;
     long seed = 0;
     CyclicBarrier l;
     Random rand;
     public static void main(String[] args) throws Throwable {
         ConcurrentClassLoadingTest test = new ConcurrentClassLoadingTest();
         test.parseArgs(args);
         test.run();
     }
     void parseArgs(String[] args) {
         int i = 0;
         while (i < args.length) {
             String flag = args[i];
             switch(flag) {
                 case "-seed":
                     seed = Long.parseLong(args[++i]);
                     break;
                 case "-numThreads":
                     numThreads = Integer.parseInt(args[++i]);
                     break;
                 default:
                     throw new Error("Unknown flag: " + flag);
             }
             ++i;
         }
     }
     void init() {
         if (numThreads == 0) {
             numThreads = Runtime.getRuntime().availableProcessors();
         }
         if (seed == 0) {
             seed = (new Random()).nextLong();
         }
         rand = new Random(seed);
         l = new CyclicBarrier(numThreads + 1);
         System.out.printf("Threads: %d\n", numThreads);
         System.out.printf("Seed: %d\n", seed);
     }
     final List<Loader> loaders = new ArrayList<>();
     void prepare() {
         List<String> c = new ArrayList<>(Arrays.asList(classNames));
         // Split classes between loading threads
         int count = (classNames.length / numThreads) + 1;
         for (int t = 0; t < numThreads; t++) {
             List<String> sel = new ArrayList<>();
             System.out.printf("Thread #%d:\n", t);
             for (int i = 0; i < count; i++) {
                 if (c.size() == 0) break;
                 int k = rand.nextInt(c.size());
                 String elem = c.remove(k);
                 sel.add(elem);
                 System.out.printf("\t%s\n", elem);
             }
             loaders.add(new Loader(sel));
         }
         // Print diagnostic info when the test hangs
         Runtime.getRuntime().addShutdownHook(new Thread() {
             public void run() {
                 boolean alive = false;
                 for (Loader l : loaders) {
                     if (!l.isAlive())  continue;
                     if (!alive) {
                         System.out.println("Some threads are still alive:");
                         alive = true;
                     }
                     System.out.println(l.getName());
                     for (StackTraceElement elem : l.getStackTrace()) {
                         System.out.println("\t"+elem.toString());
                     }
                 }
             }
         });
     }
     public void run() throws Throwable {
         init();
         prepare();
         for (Loader loader : loaders) {
             loader.start();
         }
         l.await();
         for (Loader loader : loaders) {
             loader.join();
         }
     }
     class Loader extends Thread {
         List<String> classes;
         public Loader(List<String> classes) {
             this.classes = classes;
             setDaemon(true);
         }
         @Override
         public void run() {
             try {
                 l.await();
                 for (String name : classes) {
                     Class.forName(name).getName();
                 }
             } catch (ClassNotFoundException | BrokenBarrierException | InterruptedException e) {
                 throw new Error(e);
             }
         }
     }
     final static String[] classNames = {
             "java.lang.invoke.CallSite",
             "java.lang.invoke.ConstantCallSite",
             "java.lang.invoke.LambdaConversionException",
             "java.lang.invoke.LambdaMetafactory",
             "java.lang.invoke.MethodHandle",
             "java.lang.invoke.MethodHandleInfo",
             "java.lang.invoke.MethodHandleProxies",
             "java.lang.invoke.MethodHandles",
             "java.lang.invoke.MethodType",
             "java.lang.invoke.MutableCallSite",
             "java.lang.invoke.SerializedLambda",
             "java.lang.invoke.SwitchPoint",
             "java.lang.invoke.VolatileCallSite",
             "java.lang.invoke.WrongMethodTypeException"
     };
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/compiler/jsr292/ConcurrentClassLoadingTest.java@2bac854670c0 (annotated)

test/compiler/jsr292/ConcurrentClassLoadingTest.java