1 /*
   2  * Copyright (c) 2018, 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 /*
  25  * @test TestHumongousObjectsOnNvdimm
  26  * @summary Check that humongous objects reside in nv-dimm
  27  * @library /test/lib /
  28  * @requires vm.gc=="null" & os.family != "aix"
  29  * @requires test.vm.gc.nvdimm
  30  * @build sun.hotspot.WhiteBox
  31  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  32  * @run main TestHumongousObjectsOnNvdimm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
  33  *                                  -XX:+WhiteBoxAPI
  34  */
  35 
  36 import jdk.test.lib.process.OutputAnalyzer;
  37 import jdk.test.lib.process.ProcessTools;
  38 import jdk.test.lib.Asserts;
  39 import sun.hotspot.WhiteBox;
  40 
  41 import java.util.ArrayList;
  42 import java.util.List;
  43 import java.util.Collections;
  44 import gc.testlibrary.Helpers;
  45 
  46 /**
  47  * Test spawns HumongousObjectTest in a separate VM and expects that it
  48  * completes without a RuntimeException.
  49  */
  50 public class TestHumongousObjectsOnNvdimm {
  51 
  52     private static ArrayList<String> testOpts;
  53 
  54     public static void main(String args[]) throws Exception {
  55         testOpts = new ArrayList();
  56 
  57         String[] common_options = new String[] {
  58             "-Xbootclasspath/a:.",
  59             "-XX:+UnlockExperimentalVMOptions",
  60             "-XX:+UnlockDiagnosticVMOptions",
  61             "-XX:+WhiteBoxAPI",
  62             "-XX:AllocateOldGenAt="+System.getProperty("test.dir", "."),
  63             "-Xms10M", "-Xmx10M",
  64             "-XX:G1HeapRegionSize=1m"
  65         };
  66 
  67         String testVmOptsStr = System.getProperty("test.java.opts");
  68         if (!testVmOptsStr.isEmpty()) {
  69             String[] testVmOpts = testVmOptsStr.split(" ");
  70             Collections.addAll(testOpts, testVmOpts);
  71         }
  72         Collections.addAll(testOpts, common_options);
  73 
  74         // Test with G1 GC
  75         runTest("-XX:+UseG1GC");
  76     }
  77 
  78     private static void runTest(String... extraFlags) throws Exception {
  79         Collections.addAll(testOpts, extraFlags);
  80         testOpts.add(HumongousObjectTest.class.getName());
  81         System.out.println(testOpts);
  82 
  83         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false,
  84                 testOpts.toArray(new String[testOpts.size()]));
  85 
  86         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  87         output.shouldHaveExitValue(0);
  88     }
  89 }
  90 
  91 /**
  92  * This class tests that a humongous object resides in NVDIMM.
  93  */
  94 class HumongousObjectTest {
  95     private static final WhiteBox WB = WhiteBox.getWhiteBox();
  96 
  97     private static void validateObject(Object o) {
  98         Asserts.assertTrue(WB.isObjectInOldGen(o),
  99                 "Object is supposed to be in OldGen");
 100 
 101         long obj_addr = WB.getObjectAddress(o);
 102         long nvdimm_heap_start = WB.nvdimmReservedStart();
 103         long nvdimm_heap_end = WB.nvdimmReservedEnd();
 104 
 105         Asserts.assertTrue(WB.g1BelongsToHumongousRegion(obj_addr), "Object address should be in Humongous set");
 106         Asserts.assertTrue(obj_addr >= nvdimm_heap_start && obj_addr < nvdimm_heap_end,
 107                 "Humongous object does not reside in NVDIMM");
 108     }
 109 
 110     public static void main(String args[]) throws Exception {
 111         // allocate an humongous object
 112         int byteArrayMemoryOverhead = Helpers.detectByteArrayAllocationOverhead();
 113         int MinByteArrayHumongousSize = (WB.g1RegionSize() / 2) - byteArrayMemoryOverhead + 1;
 114         byte[] obj = new byte[MinByteArrayHumongousSize];
 115 
 116         validateObject(obj);
 117     }
 118 }