jdk8-mips64-public/hotspot: test/gc/TestSoftReferencesBehaviorOnOOME.java@8c95980d0b66 (annotated)

test/gc/TestSoftReferencesBehaviorOnOOME.java@8c95980d0b66 (annotated)

test/gc/TestSoftReferencesBehaviorOnOOME.java

Sat, 07 Nov 2020 10:30:02 +0800

author: aoqi
date: Sat, 07 Nov 2020 10:30:02 +0800
changeset 10026: 8c95980d0b66
parent 8625: f7b4a17a9d49
permissions: -rw-r--r--

Added tag mips-jdk8u275-b01 for changeset d3b4d62f391f

 /*
  * Copyright (c) 2014, 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.
  */
 /**
  * @test TestSoftReferencesBehaviorOnOOME
  * @key gc
  * @summary Tests that all SoftReferences has been cleared at time of OOM.
  * @library /testlibrary
  * @build TestSoftReferencesBehaviorOnOOME
  * @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 512 2k
  * @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 128k 256k
  * @run main/othervm -Xmx128m TestSoftReferencesBehaviorOnOOME 2k 32k 10
  */
 import java.util.*;
 import com.oracle.java.testlibrary.Utils;
 import java.lang.ref.SoftReference;
 import java.util.LinkedList;
 public class TestSoftReferencesBehaviorOnOOME {
     private static final Random rndGenerator = new Random();
     public static void main(String[] args) {
         int semiRefAllocFrequency = DEFAULT_FREQUENCY;
         long minSize = DEFAULT_MIN_SIZE,
                 maxSize = DEFAULT_MAX_SIZE;
         if ( args.length >= 3 ) {
             semiRefAllocFrequency = Integer.parseInt(args[2]);
         }
         if ( args.length >= 2) {
             maxSize = getBytesCount(args[1]);
         }
         if ( args.length >= 1) {
             minSize = getBytesCount(args[0]);
         }
         new TestSoftReferencesBehaviorOnOOME().softReferencesOom(minSize, maxSize, semiRefAllocFrequency);
     }
     /**
      * Test that all SoftReferences has been cleared at time of OOM.
      */
     void softReferencesOom(long minSize, long maxSize, int semiRefAllocFrequency) {
         System.out.format( "minSize = %d, maxSize = %d, freq = %d%n", minSize, maxSize, semiRefAllocFrequency );
         long counter = 0;
         long multiplier = maxSize - minSize;
         LinkedList<SoftReference> arrSoftRefs = new LinkedList();
         LinkedList arrObjects = new LinkedList();
         long numberOfNotNulledObjects = 0;
         long oomSoftArraySize = 0;
         try {
             while (true) {
                 // Keep every Xth object to make sure we hit OOM pretty fast
                 if (counter % semiRefAllocFrequency != 0) {
                     long allocationSize = ((int) (rndGenerator.nextDouble() * multiplier))
                             + minSize;
                     arrObjects.add(new byte[(int)allocationSize]);
                 } else {
                     arrSoftRefs.add(new SoftReference(new Object()));
                 }
                 counter++;
                 if (counter == Long.MAX_VALUE) {
                     counter = 0;
                 }
             }
         } catch (OutOfMemoryError oome) {
             // Clear allocated ballast, so we don't get another OOM.
             arrObjects = null;
             // Get the number of soft refs first, so we don't trigger
             // another OOM.
             oomSoftArraySize = arrSoftRefs.size();
             for (SoftReference sr : arrSoftRefs) {
                 Object o = sr.get();
                 if (o != null) {
                     numberOfNotNulledObjects++;
                 }
             }
             // Make sure we clear all refs before we return failure
             arrSoftRefs = null;
             if (numberOfNotNulledObjects > 0) {
                 throw new RuntimeException(numberOfNotNulledObjects + " out of "
                         + oomSoftArraySize + " SoftReferences was not "
                         + "null at time of OutOfMemoryError");
             }
         } finally {
             arrSoftRefs = null;
             arrObjects = null;
         }
     }
     private static final long getBytesCount(String arg) {
         String postfixes = "kMGT";
         long mod = 1;
         if (arg.trim().length() >= 2) {
             mod = postfixes.indexOf(
                     arg.trim().charAt(arg.length() - 1)
             );
             if (mod != -1) {
                 mod = (long) Math.pow(1024, mod+1);
                 arg = arg.substring(0, arg.length() - 1);
             } else {
                 mod = 1; // 10^0
             }
         }
         return Long.parseLong(arg) * mod;
     }
     private static final long DEFAULT_MIN_SIZE = 512;
     private static final long DEFAULT_MAX_SIZE = 1024;
     private static final int DEFAULT_FREQUENCY = 4;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/gc/TestSoftReferencesBehaviorOnOOME.java@8c95980d0b66 (annotated)

test/gc/TestSoftReferencesBehaviorOnOOME.java