1 /* 2 * Copyright (c) 2013, 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 ClassFileInstaller sun.hotspot.WhiteBox 31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail VirtualAllocTestType 32 */ 33 34 import com.oracle.java.testlibrary.*; 35 import sun.hotspot.WhiteBox; 36 37 public class VirtualAllocTestType { 38 39 public static WhiteBox wb = WhiteBox.getWhiteBox(); 40 public static void main(String args[]) throws Exception { 41 OutputAnalyzer output; 42 long commitSize = 128 * 1024; 43 long reserveSize = 256 * 1024; 44 long addr; 45 46 String pid = Integer.toString(ProcessTools.getProcessId()); 47 ProcessBuilder pb = new ProcessBuilder(); 48 49 boolean has_nmt_detail = wb.NMTIsDetailSupported(); 50 if (has_nmt_detail) { 51 System.out.println("NMT detail support detected."); 52 } else { 53 System.out.println("NMT detail support not detected."); 54 } 55 56 addr = wb.NMTReserveMemory(reserveSize); 57 mergeData(); 58 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "detail"}); 59 60 output = new OutputAnalyzer(pb.start()); 61 output.shouldContain("Test (reserved=256KB, committed=0KB)"); 62 if (has_nmt_detail) { 63 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved 256KB for Test"); 64 } 65 66 wb.NMTCommitMemory(addr, commitSize); 67 68 mergeData(); 69 70 output = new OutputAnalyzer(pb.start()); 71 output.shouldContain("Test (reserved=256KB, committed=128KB)"); 72 if (has_nmt_detail) { 73 output.shouldMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed 128KB"); 74 } 75 76 wb.NMTUncommitMemory(addr, commitSize); 77 78 mergeData(); 79 80 output = new OutputAnalyzer(pb.start()); 81 output.shouldContain("Test (reserved=256KB, committed=0KB)"); 82 output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + commitSize) + "\\] committed"); 83 84 wb.NMTReleaseMemory(addr, reserveSize); 85 mergeData(); 86 87 output = new OutputAnalyzer(pb.start()); 88 output.shouldNotContain("Test (reserved="); 89 output.shouldNotMatch("\\[0x[0]*" + Long.toHexString(addr) + " - 0x[0]*" + Long.toHexString(addr + reserveSize) + "\\] reserved"); 90 } 91 92 public static void mergeData() throws Exception { 93 // Use WB API to ensure that all data has been merged before we continue 94 if (!wb.NMTWaitForDataMerge()) { 95 throw new Exception("Call to WB API NMTWaitForDataMerge() failed"); 96 } 97 } 98 }