jdk8-mips64-public/hotspot: test/runtime/jni/ReturnJNIWeak/ReturnJNIWeak.java@e86bc9786d83 (annotated)

test/runtime/jni/ReturnJNIWeak/ReturnJNIWeak.java@e86bc9786d83 (annotated)

test/runtime/jni/ReturnJNIWeak/ReturnJNIWeak.java

Fri, 10 May 2019 18:50:40 +0000

author: phh
date: Fri, 10 May 2019 18:50:40 +0000
changeset 9671: e86bc9786d83
permissions: -rw-r--r--

8223664: Add jtreg tests for 8223528, backport to jdk8u of 8176100
Summary: Add hotspot/test/runtime/jni directory with two tests for 8176100
Reviewed-by: kbarrett, coleenp, tschatzl

 /*
  * Copyright (c) 2017, 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.
  */
 public final class ReturnJNIWeak {
     static {
         System.loadLibrary("ReturnJNIWeak");
     }
     private static final class TestObject {
         public final int value;
         public TestObject(int value) {
             this.value = value;
         }
     }
     private static volatile TestObject testObject = null;
     private static native void registerObject(Object o);
     private static native void unregisterObject();
     private static native Object getObject();
     // Create the test object and record it both strongly and weakly.
     private static void remember(int value) {
         TestObject o = new TestObject(value);
         registerObject(o);
         testObject = o;
     }
     // Remove both strong and weak references to the current test object.
     private static void forget() {
         unregisterObject();
         testObject = null;
     }
     // Verify the weakly recorded object
     private static void checkValue(int value) throws Exception {
         Object o = getObject();
         if (o == null) {
             throw new RuntimeException("Weak reference unexpectedly null");
         }
         TestObject t = (TestObject)o;
         if (t.value != value) {
             throw new RuntimeException("Incorrect value");
         }
     }
     // Verify we can create a weak reference and get it back.
     private static void testSanity() throws Exception {
         System.out.println("running testSanity");
         int value = 5;
         try {
             remember(value);
             checkValue(value);
         } finally {
             forget();
         }
     }
     // Verify weak ref value survives across collection if strong ref exists.
     private static void testSurvival() throws Exception {
         System.out.println("running testSurvival");
         int value = 10;
         try {
             remember(value);
             checkValue(value);
             System.gc();
             // Verify weak ref still has expected value.
             checkValue(value);
         } finally {
             forget();
         }
     }
     // Verify weak ref cleared if no strong ref exists.
     private static void testClear() throws Exception {
         System.out.println("running testClear");
         int value = 15;
         try {
             remember(value);
             checkValue(value);
             // Verify still good.
             checkValue(value);
             // Drop reference.
             testObject = null;
             System.gc();
             // Verify weak ref cleared as expected.
             Object recorded = getObject();
             if (recorded != null) {
                 throw new RuntimeException("expected clear");
             }
         } finally {
             forget();
         }
     }
     public static void main(String[] args) throws Exception {
         testSanity();
         testSurvival();
         testClear();
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/runtime/jni/ReturnJNIWeak/ReturnJNIWeak.java@e86bc9786d83 (annotated)

test/runtime/jni/ReturnJNIWeak/ReturnJNIWeak.java