1 /*
   2  * Copyright (c) 2016, 2019, 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  */
  23 
  24 package gc.survivorAlignment;
  25 
  26 /**
  27  * @test
  28  * @bug 8060463
  29  * @summary Verify that objects promoted from eden space to survivor space
  30  *          with large values for SurvivorAlignmentInBytes succeed.
  31  * @requires vm.opt.ExplicitGCInvokesConcurrent != true
  32  * @run main/othervm -Xmx128m
  33  *                   -XX:+UnlockExperimentalVMOptions
  34  *                   -XX:SurvivorAlignmentInBytes=8 -XX:SurvivorRatio=1
  35  *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
  36  *                   gc.survivorAlignment.TestPromotionLABLargeSurvivorAlignment
  37  * @run main/othervm -Xmx128m
  38  *                   -XX:+UnlockExperimentalVMOptions
  39  *                   -XX:SurvivorAlignmentInBytes=16 -XX:SurvivorRatio=1
  40  *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
  41  *                   gc.survivorAlignment.TestPromotionLABLargeSurvivorAlignment
  42  * @run main/othervm -Xmx128m
  43  *                   -XX:+UnlockExperimentalVMOptions
  44  *                   -XX:SurvivorAlignmentInBytes=512 -XX:SurvivorRatio=1
  45  *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
  46  *                   gc.survivorAlignment.TestPromotionLABLargeSurvivorAlignment
  47  * @run main/othervm -Xmx128m
  48  *                   -XX:+UnlockExperimentalVMOptions
  49  *                   -XX:SurvivorAlignmentInBytes=1k -XX:SurvivorRatio=1
  50  *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
  51  *                   gc.survivorAlignment.TestPromotionLABLargeSurvivorAlignment
  52  * @run main/othervm -Xmx128m
  53  *                   -XX:+UnlockExperimentalVMOptions
  54  *                   -XX:SurvivorAlignmentInBytes=4k -XX:SurvivorRatio=1
  55  *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
  56  *                   gc.survivorAlignment.TestPromotionLABLargeSurvivorAlignment
  57  * @run main/othervm -Xmx128m
  58  *                   -XX:+UnlockExperimentalVMOptions
  59  *                   -XX:SurvivorAlignmentInBytes=16k -XX:SurvivorRatio=1
  60  *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
  61  *                   gc.survivorAlignment.TestPromotionLABLargeSurvivorAlignment
  62  */
  63 public class TestPromotionLABLargeSurvivorAlignment {
  64     public static void main(String args[]) {
  65         Object garbage[] = new Object[1000000];
  66         for (int i = 0; i < garbage.length; i++) {
  67             garbage[i] = new byte[0];
  68         }
  69         for (int i = 0; i < 2; i++) {
  70             System.gc();
  71         }
  72     }
  73 }
  74