jdk8-mips64-public/hotspot: test/gc/g1/TestDeferredRSUpdate.java@833b0f92429a

8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill

     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  */

    24 /*

    25  * @test TestDeferredRSUpdate

    26  * @bug 8040977 8052170

    27  * @summary Ensure that running with -XX:-G1DeferredRSUpdate does not crash the VM

    28  * @key gc

    29  * @library /testlibrary

    30  */

    32 import com.oracle.java.testlibrary.ProcessTools;

    33 import com.oracle.java.testlibrary.OutputAnalyzer;

    35 public class TestDeferredRSUpdate {

    36   public static void main(String[] args) throws Exception {

    37     GCTest.main(args);

    39     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",

    40                                                               "-Xmx10M",

    41                                                               "-XX:+PrintGCDetails",

    42                                                               // G1DeferredRSUpdate is a develop option, but we cannot limit execution of this test to only debug VMs.

    43                                                               "-XX:+IgnoreUnrecognizedVMOptions",

    44                                                               "-XX:-G1DeferredRSUpdate",

    45                                                               GCTest.class.getName());

    47     OutputAnalyzer output = new OutputAnalyzer(pb.start());

    48     output.shouldHaveExitValue(0);

    49   }

    51   static class GCTest {

    52     private static Object[] garbage = new Object[32];

    54     public static void main(String [] args) {

    55       System.out.println("Creating garbage");

    56       // Create 128MB of garbage. This should result in at least one minor GC, with

    57       // some objects copied to old gen. As references from old to young are installed,

    58       // the crash due to the use before initialize occurs.

    59       Object prev = null;

    60       Object prevPrev = null;

    61       for (int i = 0; i < 1024; i++) {

    62         Object[] next = new Object[32 * 1024];

    63         next[0] = prev;

    64         next[1] = prevPrev;

    66         Object[] cur = (Object[]) garbage[i % garbage.length];

    67         if (cur != null) {

    68           cur[0] = null;

    69           cur[1] = null;

    70         }

    71         garbage[i % garbage.length] = next;

    73         prevPrev = prev;

    74         prev = next;

    75       }

    76       System.out.println("Done");

    77     }

    78   }

    79 }

Mercurial > jdk8-mips64-public > hotspot / file revision

test/gc/g1/TestDeferredRSUpdate.java@833b0f92429a

test/gc/g1/TestDeferredRSUpdate.java