1/* 2 * Copyright (c) 2014, 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 reserve/commit/uncommit/release of virtual memory and that we track it correctly 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 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail VirtualAllocCommitUncommitRecommit 34 * 35 */ 36 37import jdk.test.lib.process.ProcessTools; 38import jdk.test.lib.process.OutputAnalyzer; 39import jdk.test.lib.JDKToolFinder; 40 41import sun.hotspot.WhiteBox; 42 43public class VirtualAllocCommitUncommitRecommit { 44 45 public static WhiteBox wb = WhiteBox.getWhiteBox(); 46 47 public static void main(String args[]) throws Exception { 48 OutputAnalyzer output; 49 long commitSize = 128 * 1024; // 128KB 50 long reserveSize = 4 * 1024 * 1024; // 4096KB 51 long addr; 52 53 String pid = Long.toString(ProcessTools.getProcessId()); 54 ProcessBuilder pb = new ProcessBuilder(); 55 56 // reserve 57 addr = wb.NMTReserveMemory(reserveSize); 58 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, 59 "VM.native_memory", "detail" }); 60 61 output = new OutputAnalyzer(pb.start()); 62 output.shouldContain("Test (reserved=4096KB, committed=0KB)"); 63 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" 64 + Long.toHexString(addr + reserveSize) 65 + "\\] reserved 4096KB for Test"); 66 67 long addrA = addr; 68 long addrB = addr + commitSize; 69 long addrC = addr + (2 * commitSize); 70 long addrD = addr + (3 * commitSize); 71 long addrE = addr + (4 * commitSize); 72 long addrF = addr + (5 * commitSize); 73 74 // commit ABCD 75 wb.NMTCommitMemory(addrA, commitSize); 76 wb.NMTCommitMemory(addrB, commitSize); 77 wb.NMTCommitMemory(addrC, commitSize); 78 wb.NMTCommitMemory(addrD, commitSize); 79 80 output = new OutputAnalyzer(pb.start()); 81 output.shouldContain("Test (reserved=4096KB, committed=512KB)"); 82 83 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" 84 + Long.toHexString(addr + reserveSize) 85 + "\\] reserved 4096KB for Test"); 86 // uncommit BC 87 wb.NMTUncommitMemory(addrB, commitSize); 88 wb.NMTUncommitMemory(addrC, commitSize); 89 90 output = new OutputAnalyzer(pb.start()); 91 output.shouldContain("Test (reserved=4096KB, committed=256KB)"); 92 93 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" 94 + Long.toHexString(addr + reserveSize) 95 + "\\] reserved 4096KB for Test"); 96 97 // commit EF 98 wb.NMTCommitMemory(addrE, commitSize); 99 wb.NMTCommitMemory(addrF, commitSize); 100 101 output = new OutputAnalyzer(pb.start()); 102 output.shouldContain("Test (reserved=4096KB, committed=512KB)"); 103 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" 104 + Long.toHexString(addr + reserveSize) 105 + "\\] reserved 4096KB for Test"); 106 107 // uncommit A 108 wb.NMTUncommitMemory(addrA, commitSize); 109 110 output = new OutputAnalyzer(pb.start()); 111 output.shouldContain("Test (reserved=4096KB, committed=384KB)"); 112 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" 113 + Long.toHexString(addr + reserveSize) 114 + "\\] reserved 4096KB for Test"); 115 116 // commit ABC 117 wb.NMTCommitMemory(addrA, commitSize); 118 wb.NMTCommitMemory(addrB, commitSize); 119 wb.NMTCommitMemory(addrC, commitSize); 120 121 output = new OutputAnalyzer(pb.start()); 122 output.shouldContain("Test (reserved=4096KB, committed=768KB)"); 123 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" 124 + Long.toHexString(addr + reserveSize) 125 + "\\] reserved 4096KB for Test"); 126 127 // uncommit ABCDEF 128 wb.NMTUncommitMemory(addrA, commitSize); 129 wb.NMTUncommitMemory(addrB, commitSize); 130 wb.NMTUncommitMemory(addrC, commitSize); 131 wb.NMTUncommitMemory(addrD, commitSize); 132 wb.NMTUncommitMemory(addrE, commitSize); 133 wb.NMTUncommitMemory(addrF, commitSize); 134 135 output = new OutputAnalyzer(pb.start()); 136 output.shouldContain("Test (reserved=4096KB, committed=0KB)"); 137 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" 138 + Long.toHexString(addr + reserveSize) 139 + "\\] reserved 4096KB for Test"); 140 141 // release 142 wb.NMTReleaseMemory(addr, reserveSize); 143 output = new OutputAnalyzer(pb.start()); 144 output.shouldNotContain("Test (reserved="); 145 output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" 146 + Long.toHexString(addr + reserveSize) + "\\] reserved 4096KB for Test"); 147 } 148} 149