1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test LFMultiThreadCachingTest
  26  * @bug 8046703
  27  * @summary Test verifies that lambda forms are cached when run with multiple threads
  28  * @author kshefov
  29  * @library /lib/testlibrary/jsr292 /lib/testlibrary
  30  * @build TestMethods
  31  * @build LambdaFormTestCase
  32  * @build LFCachingTestCase
  33  * @build LFMultiThreadCachingTest
  34  * @run main/othervm/timeout=300 -Djava.lang.invoke.MethodHandle.USE_LF_EDITOR=true -XX:ReservedCodeCacheSize=64m LFMultiThreadCachingTest
  35  */
  36 
  37 import java.lang.invoke.MethodHandle;
  38 import java.util.EnumSet;
  39 import java.util.Map;
  40 import java.util.concurrent.BrokenBarrierException;
  41 import java.util.concurrent.ConcurrentLinkedQueue;
  42 import java.util.concurrent.CountDownLatch;
  43 import java.util.concurrent.CyclicBarrier;
  44 
  45 /**
  46  * Multiple threaded lambda forms caching test class.
  47  */
  48 public final class LFMultiThreadCachingTest extends LFCachingTestCase {
  49     private static final TestMethods.Kind[] KINDS;
  50     static {
  51         EnumSet<TestMethods.Kind> set = EnumSet.complementOf(EnumSet.of(TestMethods.Kind.EXCEPT));
  52         KINDS = set.toArray(new TestMethods.Kind[set.size()]);
  53         if (KINDS.length < 2) {
  54             throw new Error("TESTBUG: KINDS.length[" + KINDS.length + "] should be at least 2");
  55         }
  56     }
  57     private static final int CORES = Math.max(KINDS.length, Runtime.getRuntime().availableProcessors());
  58 
  59     /**
  60      * Constructor a for multiple threaded lambda forms caching test case.
  61      *
  62      * @param testMethod A method from {@code j.l.i.MethodHandles} class that
  63      * returns a {@code j.l.i.MethodHandle} instance.
  64      */
  65     public LFMultiThreadCachingTest(TestMethods testMethod) {
  66         super(testMethod);
  67     }
  68 
  69     @Override
  70     public void doTest() {
  71         Map<String, Object> data = getTestMethod().getTestCaseData();
  72         ConcurrentLinkedQueue<MethodHandle> adapters = new ConcurrentLinkedQueue<>();
  73         CyclicBarrier begin = new CyclicBarrier(CORES);
  74         CountDownLatch end = new CountDownLatch(CORES);
  75         for (int i = 0; i < CORES; ++i) {
  76             TestMethods.Kind kind = KINDS[i % KINDS.length];
  77             new Thread(() -> {
  78                 try {
  79                     begin.await();
  80                     adapters.add(getTestMethod().getTestCaseMH(data, kind));
  81                 } catch (InterruptedException | BrokenBarrierException | IllegalAccessException | NoSuchMethodException ex) {
  82                     throw new Error("Unexpected exception: ", ex);
  83                 } finally {
  84                     end.countDown();
  85                 }
  86             }).start();
  87         }
  88         try {
  89             end.await();
  90         } catch (InterruptedException ex) {
  91             throw new Error("Unexpected exception: ", ex);
  92         }
  93         if (adapters.size() < CORES) {
  94             throw new Error("adapters size[" + adapters.size() + "] is less than " + CORES);
  95         }
  96         MethodHandle prev = adapters.poll();
  97         for (MethodHandle current : adapters) {
  98             checkLFCaching(prev, current);
  99             prev = current;
 100         }
 101     }
 102 
 103     /**
 104      * Main routine for multiple threaded lambda forms caching test.
 105      *
 106      * @param args Accepts no arguments.
 107      */
 108     public static void main(String[] args) {
 109         LambdaFormTestCase.runTests(LFMultiThreadCachingTest::new, EnumSet.allOf(TestMethods.class));
 110     }
 111 }