1 /* 2 * Copyright (c) 2014, 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 /testlibrary /testlibrary/whitebox 29 * @build VirtualAllocTestType 30 * @run main/othervm/bootclasspath -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail VirtualAllocTestType 31 */ 32 33 import com.oracle.java.testlibrary.*; 34 import sun.hotspot.WhiteBox; 35 36 public class VirtualAllocTestType { 37 38 public static WhiteBox wb = WhiteBox.getWhiteBox(); 39 public static void main(String args[]) throws Exception { 40 OutputAnalyzer output; 41 long commitSize = 128 * 1024; 42 long reserveSize = 256 * 1024; 43 long addr; 44 45 String pid = Integer.toString(ProcessTools.getProcessId()); 46 ProcessBuilder pb = new ProcessBuilder(); 47 48 boolean has_nmt_detail = wb.NMTIsDetailSupported(); 49 if (has_nmt_detail) { 50 System.out.println("NMT detail support detected."); 51 } else { 52 System.out.println("NMT detail support not detected."); 53 } 54 55 addr = wb.NMTReserveMemory(reserveSize); 56 mergeData(); 57 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"}); 58 59 output = new OutputAnalyzer(pb.start()); 60 output.shouldContain("Test (reserved=256KB, committed=0KB)"); 61 if (has_nmt_detail) { 62 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved 256KB for Test"); 63 } 64 65 wb.NMTCommitMemory(addr, commitSize); 66 67 mergeData(); 68 69 output = new OutputAnalyzer(pb.start()); 70 output.shouldContain("Test (reserved=256KB, committed=128KB)"); 71 if (has_nmt_detail) { 72 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed 128KB"); 73 } 74 75 wb.NMTUncommitMemory(addr, commitSize); 76 77 mergeData(); 78 79 output = new OutputAnalyzer(pb.start()); 80 output.shouldContain("Test (reserved=256KB, committed=0KB)"); 81 output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed"); 82 83 wb.NMTReleaseMemory(addr, reserveSize); 84 mergeData(); 85 86 output = new OutputAnalyzer(pb.start()); 87 output.shouldNotContain("Test (reserved="); 88 output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved"); 89 } 90 91 public static void mergeData() throws Exception { 92 // Use WB API to ensure that all data has been merged before we continue 93 if (!wb.NMTWaitForDataMerge()) { 94 throw new Exception("Call to WB API NMTWaitForDataMerge() failed"); 95 } 96 } 97 }