jdk8-mips64-public/hotspot: test/runtime/Metaspace/FragmentMetaspaceSimple.java@dbb05f6d93c4

8051344: JVM crashed in Compile::start() during method parsing w/ UseRTMDeopt turned on
Summary: call rtm_deopt() only if there were no compilation bailouts before.
Reviewed-by: kvn

     1 /*

     2  * Copyright (c) 2013, 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

    26  * @library /runtime/testlibrary

    27  * @library classes

    28  * @build test.Empty ClassUnloadCommon

    29  * @run main/othervm/timeout=200 FragmentMetaspaceSimple

    30  */

    32 import java.util.ArrayList;

    34 /**

    35  * Test that tries to fragment the native memory used by class loaders.

    36  * Keeps every other class loader alive in order to fragment the memory space

    37  * used to store classes and meta data. Since the memory is probably allocated in

    38  * chunks per class loader this will cause a lot of fragmentation if not handled

    39  * properly since every other chunk will be unused.

    40  */

    41 public class FragmentMetaspaceSimple {

    42     public static void main(String... args) {

    43         runSimple(Long.valueOf(System.getProperty("time", "80000")));

    44         System.gc();

    45     }

    47     private static void runSimple(long time) {

    48         long startTime = System.currentTimeMillis();

    49         ArrayList<ClassLoader> cls = new ArrayList<>();

    50         for (int i = 0; System.currentTimeMillis() < startTime + time; ++i) {

    51             ClassLoader ldr = ClassUnloadCommon.newClassLoader();

    52             if (i % 1000 == 0) {

    53                 cls.clear();

    54             }

    55             // only keep every other class loader alive

    56             if (i % 2 == 1) {

    57                 cls.add(ldr);

    58             }

    59             Class<?> c = null;

    60             try {

    61                 c = ldr.loadClass("test.Empty");

    62             } catch (ClassNotFoundException ex) {

    63                 throw new RuntimeException(ex);

    64             }

    65             c = null;

    66         }

    67         cls = null;

    68     }

    69 }

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

test/runtime/Metaspace/FragmentMetaspaceSimple.java@dbb05f6d93c4

test/runtime/Metaspace/FragmentMetaspaceSimple.java