ReleaseNoCommit.java revision 8359:ed6389f70257 
1/*
2 * Copyright (c) 2014, 2015, 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 * @modules java.base/sun.misc
30 *          java.management
31 * @build ReleaseNoCommit
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=summary ReleaseNoCommit
34 */
35
36import jdk.test.lib.JDKToolFinder;
37import jdk.test.lib.OutputAnalyzer;
38import jdk.test.lib.ProcessTools;
39
40import sun.hotspot.WhiteBox;
41
42public class ReleaseNoCommit {
43
44    public static void main(String args[]) throws Exception {
45        WhiteBox wb = WhiteBox.getWhiteBox();
46        long reserveSize = 256 * 1024;
47        long addr;
48
49        ProcessBuilder pb = new ProcessBuilder();
50        OutputAnalyzer output;
51        // Grab my own PID
52        String pid = Integer.toString(ProcessTools.getProcessId());
53
54        addr = wb.NMTReserveMemory(reserveSize);
55        // Check for reserved
56        pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "scale=KB"});
57        output = new OutputAnalyzer(pb.start());
58        output.shouldContain(" Test (reserved=256KB, committed=0KB)");
59
60        wb.NMTReleaseMemory(addr, reserveSize);
61
62        pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "scale=KB"});
63        output = new OutputAnalyzer(pb.start());
64        output.shouldNotContain("Test (reserved=");
65    }
66}
67