1 /*
   2  * Copyright (c) 2018 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  * @build sun.hotspot.WhiteBox
  29  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  30  * @run main TestHumongousObjectsOnNvdimm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions 
  31  *                                  -XX:+WhiteBoxAPI
  32  */
  33 
  34 import jdk.test.lib.process.OutputAnalyzer;
  35 import jdk.test.lib.process.ProcessTools;
  36 import jdk.test.lib.Asserts;
  37 import sun.hotspot.WhiteBox;
  38 
  39 import java.util.ArrayList;
  40 import java.util.List;
  41 import java.util.Collections;
  42 import gc.testlibrary.Helpers;
  43 
  44 /**
  45  * Test spawns HumongousObjectTest in a separate VM and expects that it
  46  * completes without a RuntimeException.
  47  */
  48 public class TestHumongousObjectsOnNvdimm {
  49 
  50     private static ArrayList<String> testOpts;
  51 
  52     public static void main(String args[]) throws Exception {
  53         testOpts = new ArrayList();
  54 
  55         String[] common_options = new String[] {
  56             "-Xbootclasspath/a:.",
  57             "-XX:+UnlockExperimentalVMOptions",
  58             "-XX:+UnlockDiagnosticVMOptions",
  59             "-XX:+WhiteBoxAPI",
  60             "-XX:AllocateOldGenAt="+System.getProperty("test.dir", "."),
  61             "-Xms10M", "-Xmx10M",
  62             "-XX:G1HeapRegionSize=1m"
  63         };
  64 
  65         String testVmOptsStr = System.getProperty("test.java.opts");
  66         if (!testVmOptsStr.isEmpty()) {
  67             String[] testVmOpts = testVmOptsStr.split(" ");
  68             Collections.addAll(testOpts, testVmOpts);
  69         }
  70         Collections.addAll(testOpts, common_options);
  71     
  72         // Test with G1 GC
  73         runTest("-XX:+UseG1GC");
  74     }
  75 
  76     private static void runTest(String... extraFlags) throws Exception {
  77         Collections.addAll(testOpts, extraFlags);
  78         testOpts.add(HumongousObjectTest.class.getName());
  79         System.out.println(testOpts);
  80 
  81         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(false,
  82                 testOpts.toArray(new String[testOpts.size()]));
  83 
  84         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  85         System.out.println(output.getStdout());
  86         output.shouldHaveExitValue(0);
  87     }
  88 }
  89 
  90 /**
  91  * This class tests that a humongous object resides in NVDIMM.
  92  */
  93 class HumongousObjectTest {
  94     private static final WhiteBox WB = WhiteBox.getWhiteBox();
  95 
  96     private static void validateObject(Object o) {
  97         Asserts.assertTrue(WB.isObjectInOldGen(o),
  98                 "Object is supposed to be in OldGen");
  99 
 100         long obj_addr = WB.getObjectAddress(o);
 101         long nvdimm_heap_start = WB.g1NvdimmReservedStart();
 102         long nvdimm_heap_end = WB.g1NvdimmReservedEnd();
 103         
 104         Asserts.assertTrue(WB.g1BelongsToHumongousRegion(obj_addr), "Object address should be in Humongous set");
 105         Asserts.assertTrue(obj_addr >= nvdimm_heap_start && obj_addr < nvdimm_heap_end,
 106                 "Humongous object does not reside in NVDIMM");
 107     }
 108 
 109     public static void main(String args[]) throws Exception {
 110         // allocate an humongous object
 111         int byteArrayMemoryOverhead = Helpers.detectByteArrayAllocationOverhead();
 112         int MinByteArrayHumongousSize = (WB.g1RegionSize() / 2) - byteArrayMemoryOverhead + 1;
 113         byte[] obj = new byte[MinByteArrayHumongousSize];
 114 
 115         validateObject(obj);
 116     }
 117 }