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 Release uncommitted memory and make sure NMT handles it correctly 27 * @key nmt regression 28 * @library /testlibrary /../../test/lib 29 * @build com.oracle.java.testlibrary.* ReleaseNoCommit 30 * @run main ClassFileInstaller sun.hotspot.WhiteBox 31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=summary ReleaseNoCommit 32 */ 33 34 import com.oracle.java.testlibrary.JDKToolFinder; 35 import com.oracle.java.testlibrary.OutputAnalyzer; 36 import com.oracle.java.testlibrary.ProcessTools; 37 38 import sun.hotspot.WhiteBox; 39 40 public class ReleaseNoCommit { 41 42 public static void main(String args[]) throws Exception { 43 WhiteBox wb = WhiteBox.getWhiteBox(); 44 long reserveSize = 256 * 1024; 45 long addr; 46 47 ProcessBuilder pb = new ProcessBuilder(); 48 OutputAnalyzer output; 49 // Grab my own PID 50 String pid = Integer.toString(ProcessTools.getProcessId()); 51 52 addr = wb.NMTReserveMemory(reserveSize); 53 // Check for reserved 54 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "scale=KB"}); 55 output = new OutputAnalyzer(pb.start()); 56 output.shouldContain(" Test (reserved=256KB, committed=0KB)"); 57 58 wb.NMTReleaseMemory(addr, reserveSize); 59 60 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "scale=KB"}); 61 output = new OutputAnalyzer(pb.start()); 62 output.shouldNotContain("Test (reserved="); 63 } 64 }