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 package gc.nvdimm;
 25 
 26 /*
 27  * @test TestHumongousObjectsOnNvdimm
 28  * @summary Check that humongous objects reside in nv-dimm
 29  * @library /test/lib /
 30  * @requires vm.gc=="null" & os.family != "aix"
 31  * @build sun.hotspot.WhiteBox
 32  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
 33  * @run main gc.nvdimm.TestHumongousObjectsOnNvdimm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 34  *                                  -XX:+WhiteBoxAPI
 35  */
 36 
 37 import jdk.test.lib.process.OutputAnalyzer;
 38 import jdk.test.lib.process.ProcessTools;
 39 import jdk.test.lib.Asserts;
 40 import sun.hotspot.WhiteBox;
 41 
 42 import java.util.ArrayList;
 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 }