MallocRoundingReportTest.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 Test consistency of NMT by creating allocations of the Test type with various sizes and verifying visibility with jcmd
27 * @key nmt jcmd
28 * @library /testlibrary /../../test/lib
29 * @modules java.base/sun.misc
30 *          java.management
31 * @build MallocRoundingReportTest
32 * @run main ClassFileInstaller sun.hotspot.WhiteBox
33 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocRoundingReportTest
34 *
35 */
36
37import jdk.test.lib.*;
38
39import sun.hotspot.WhiteBox;
40
41public class MallocRoundingReportTest {
42    private static long K = 1024;
43
44    public static void main(String args[]) throws Exception {
45        OutputAnalyzer output;
46        WhiteBox wb = WhiteBox.getWhiteBox();
47
48        // Grab my own PID
49        String pid = Integer.toString(ProcessTools.getProcessId());
50        ProcessBuilder pb = new ProcessBuilder();
51
52        long[] additionalBytes = {0, 1, 512, 650};
53        long[] kByteSize = {1024, 2048};
54        long mallocd_total = 0;
55        for ( int i = 0; i < kByteSize.length; i++)
56        {
57            for (int j = 0; j < (additionalBytes.length); j++) {
58                long curKB = kByteSize[i] + additionalBytes[j];
59                // round up/down to the nearest KB to match NMT reporting
60                long numKB = (curKB % kByteSize[i] >= 512) ? ((curKB / K) + 1) : curKB / K;
61                // Use WB API to alloc and free with the mtTest type
62                mallocd_total = wb.NMTMalloc(curKB);
63                // Run 'jcmd <pid> VM.native_memory summary', check for expected output
64                // NMT does not track memory allocations less than 1KB, and rounds to the nearest KB
65                String expectedOut = ("Test (reserved=" + numKB + "KB, committed=" + numKB + "KB)");
66
67                pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });
68                output = new OutputAnalyzer(pb.start());
69                output.shouldContain(expectedOut);
70
71                wb.NMTFree(mallocd_total);
72                // Run 'jcmd <pid> VM.native_memory summary', check for expected output
73                pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });
74                output = new OutputAnalyzer(pb.start());
75                output.shouldNotContain("Test (reserved=");
76            }
77        }
78    }
79}
80