jdk8-mips64-public/hotspot: test/runtime/ClassUnload/KeepAliveSoftReference.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 KeepAliveSoftReference

    26  * @summary This test case uses a java.lang.ref.SoftReference referencing a class instance to keep a class alive.

    27  * @library /testlibrary /testlibrary/whitebox /runtime/testlibrary

    28  * @library classes

    29  * @build KeepAliveSoftReference test.Empty

    30  * @build ClassUnloadCommon

    31  * @run main ClassFileInstaller sun.hotspot.WhiteBox

    32  * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveSoftReference

    33  */

    35 import java.lang.ref.SoftReference;

    36 import sun.hotspot.WhiteBox;

    38 /**

    39  * Test that verifies that classes are not unloaded when specific types of references are kept to them.

    40  */

    41 public class KeepAliveSoftReference {

    42   private static final String className = "test.Empty";

    43   private static final WhiteBox wb = WhiteBox.getWhiteBox();

    45   public static void main(String... args) throws Exception {

    46     ClassLoader cl = ClassUnloadCommon.newClassLoader();

    47     Class<?> c = cl.loadClass(className);

    48     Object o = c.newInstance();

    49     SoftReference<Object> sr = new SoftReference(o);

    50     o = null; c = null; cl = null;

    52     {

    53         boolean isAlive = wb.isClassAlive(className);

    54         System.out.println("testSoftReference (1) alive: " + isAlive);

    55         boolean cleared = (sr.get() == null);

    56         boolean shouldBeAlive = !cleared;

    57         ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive);

    58     }

    60     ClassUnloadCommon.triggerUnloading();

    62     {

    63         boolean isAlive = wb.isClassAlive(className);

    64         System.out.println("testSoftReference (2) alive: " + isAlive);

    65         boolean cleared = (sr.get() == null);

    66         boolean shouldBeAlive = !cleared;

    67         ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive);

    68     }

    69     sr.clear();

    70     ClassUnloadCommon.triggerUnloading();

    72     {

    73         boolean isAlive = wb.isClassAlive(className);

    74         System.out.println("testSoftReference (3) alive: " + isAlive);

    75         boolean cleared = (sr.get() == null);

    76         boolean shouldBeAlive = !cleared;

    77         ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive);

    78     }

    79   }

    80 }

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

test/runtime/ClassUnload/KeepAliveSoftReference.java@dbb05f6d93c4

test/runtime/ClassUnload/KeepAliveSoftReference.java