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20394
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /*
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25 * @test
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26 * @summary Test consistency of NMT by creating allocations of the Test type with various sizes and verifying visibility with jcmd
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27 * @key nmt jcmd
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28 * @library /testlibrary /testlibrary/whitebox
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29 * @build MallocRoundingReportTest
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30 * @run main ClassFileInstaller sun.hotspot.WhiteBox
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31 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=detail MallocRoundingReportTest
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32 *
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33 */
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34
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35 import com.oracle.java.testlibrary.*;
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36
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37 import sun.hotspot.WhiteBox;
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38
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39 public class MallocRoundingReportTest {
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40 private static long K = 1024;
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41
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42 public static void main(String args[]) throws Exception {
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43 OutputAnalyzer output;
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44 WhiteBox wb = WhiteBox.getWhiteBox();
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45
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46 // Grab my own PID
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47 String pid = Integer.toString(ProcessTools.getProcessId());
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48 ProcessBuilder pb = new ProcessBuilder();
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49
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50 long[] additionalBytes = {0, 1, 512, 650};
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51 long[] kByteSize = {1024, 2048};
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52 long mallocd_total = 0;
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53 for ( int i = 0; i < kByteSize.length; i++)
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54 {
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55 for (int j = 0; j < (additionalBytes.length); j++) {
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56 long curKB = kByteSize[i] + additionalBytes[j];
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57 // round up/down to the nearest KB to match NMT reporting
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58 long numKB = (curKB % kByteSize[i] >= 512) ? ((curKB / K) + 1) : curKB / K;
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59 // Use WB API to alloc and free with the mtTest type
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60 mallocd_total = wb.NMTMalloc(curKB);
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61 // Run 'jcmd <pid> VM.native_memory summary', check for expected output
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62 // NMT does not track memory allocations less than 1KB, and rounds to the nearest KB
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63 String expectedOut = ("Test (reserved=" + numKB + "KB, committed=" + numKB + "KB)");
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64
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65 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });
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66 output = new OutputAnalyzer(pb.start());
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67 output.shouldContain(expectedOut);
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68
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69 wb.NMTFree(mallocd_total);
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70 // Run 'jcmd <pid> VM.native_memory summary', check for expected output
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71 pb.command(new String[] { JDKToolFinder.getJDKTool("jcmd"), pid, "VM.native_memory", "summary" });
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72 output = new OutputAnalyzer(pb.start());
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73 output.shouldNotContain("Test (reserved=");
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74 }
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75 }
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76 }
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77 }
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