1/* 2 * Copyright (c) 2015, 2016, 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 26 * @summary Test commits of overlapping regions of memory. 27 * @key nmt jcmd 28 * @library /test/lib 29 * @modules java.base/jdk.internal.misc 30 * java.management 31 * @build sun.hotspot.WhiteBox 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * sun.hotspot.WhiteBox$WhiteBoxPermission 34 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail CommitOverlappingRegions 35 */ 36 37import jdk.test.lib.process.ProcessTools; 38import jdk.test.lib.process.OutputAnalyzer; 39import jdk.test.lib.JDKToolFinder; 40import sun.hotspot.WhiteBox; 41 42public class CommitOverlappingRegions { 43 public static WhiteBox wb = WhiteBox.getWhiteBox(); 44 public static void main(String args[]) throws Exception { 45 OutputAnalyzer output; 46 47 long size = 32 * 1024; 48 int pagesize = wb.getVMPageSize(); 49 if (size < pagesize) { size = pagesize; } // Should be aligned. 50 long sizek = size / 1024; 51 52 long addr = wb.NMTReserveMemory(8*size); 53 54 String pid = Long.toString(ProcessTools.getProcessId()); 55 ProcessBuilder pb = new ProcessBuilder(); 56 57 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"}); 58 System.out.println("Address is " + Long.toHexString(addr)); 59 60 // Start: . . . . . . . . 61 output = new OutputAnalyzer(pb.start()); 62 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)"); 63 64 // Committing: * * * . . . . . 65 // Region: * * * . . . . . 66 // Expected Total: 3 x sizek KB 67 wb.NMTCommitMemory(addr + 0*size, 3*size); 68 69 // Committing: . . . . * * * . 70 // Region: * * * . * * * . 71 // Expected Total: 6 x sizek KB 72 wb.NMTCommitMemory(addr + 4*size, 3*size); 73 74 // Check output after first 2 commits. 75 output = new OutputAnalyzer(pb.start()); 76 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 6*sizek + "KB)"); 77 78 // Committing: . . * * * . . . 79 // Region: * * * * * * * . 80 // Expected Total: 7 x sizek KB 81 wb.NMTCommitMemory(addr + 2*size, 3*size); 82 83 // Check output after overlapping commit. 84 output = new OutputAnalyzer(pb.start()); 85 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 7*sizek + "KB)"); 86 87 // Uncommitting: * * * * * * * * 88 // Region: . . . . . . . . 89 // Expected Total: 0 x sizek KB 90 wb.NMTUncommitMemory(addr + 0*size, 8*size); 91 output = new OutputAnalyzer(pb.start()); 92 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)"); 93 94 // Committing: * * . . . . . . 95 // Region: * * . . . . . . 96 // Expected Total: 2 x sizek KB 97 wb.NMTCommitMemory(addr + 0*size, 2*size); 98 output = new OutputAnalyzer(pb.start()); 99 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 2*sizek + "KB)"); 100 101 // Committing: . * * * . . . . 102 // Region: * * * * . . . . 103 // Expected Total: 4 x sizek KB 104 wb.NMTCommitMemory(addr + 1*size, 3*size); 105 output = new OutputAnalyzer(pb.start()); 106 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 4*sizek + "KB)"); 107 108 // Uncommitting: * * * . . . . . 109 // Region: . . . * . . . . 110 // Expected Total: 1 x sizek KB 111 wb.NMTUncommitMemory(addr + 0*size, 3*size); 112 output = new OutputAnalyzer(pb.start()); 113 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 1*sizek + "KB)"); 114 115 // Committing: . . . * * . . . 116 // Region: . . . * * . . . 117 // Expected Total: 2 x sizek KB 118 wb.NMTCommitMemory(addr + 3*size, 2*size); 119 System.out.println("Address is " + Long.toHexString(addr + 3*size)); 120 output = new OutputAnalyzer(pb.start()); 121 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 2*sizek + "KB)"); 122 123 // Committing: . . . . * * . . 124 // Region: . . . * * * . . 125 // Expected Total: 3 x sizek KB 126 wb.NMTCommitMemory(addr + 4*size, 2*size); 127 output = new OutputAnalyzer(pb.start()); 128 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 3*sizek + "KB)"); 129 130 // Committing: . . . . . * * . 131 // Region: . . . * * * * . 132 // Expected Total: 4 x sizek KB 133 wb.NMTCommitMemory(addr + 5*size, 2*size); 134 output = new OutputAnalyzer(pb.start()); 135 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 4*sizek + "KB)"); 136 137 // Committing: . . . . . . * * 138 // Region: . . . * * * * * 139 // Expected Total: 5 x sizek KB 140 wb.NMTCommitMemory(addr + 6*size, 2*size); 141 output = new OutputAnalyzer(pb.start()); 142 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=" + 5*sizek + "KB)"); 143 144 // Uncommitting: * * * * * * * * 145 // Region: . . . . . . . . 146 // Expected Total: 0 x sizek KB 147 wb.NMTUncommitMemory(addr + 0*size, 8*size); 148 output = new OutputAnalyzer(pb.start()); 149 output.shouldContain("Test (reserved=" + 8*sizek + "KB, committed=0KB)"); 150 } 151} 152