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annotate test/serviceability/sa/jmap-hprof/JMapHProfLargeHeapProc.java @ 12820:8ef918538e22

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6313383: SA: Update jmap to support HPROF binary format "JAVA PROFILE 1.0.2" Summary: Adds support for large(>4G) heap dumps in hprof format. Adds tests and updates testlibrary. Reviewed-by: sla, allwin Contributed-by: fredrik.arvidsson@oracle.com
author sla
date Fri, 04 Oct 2013 13:44:49 +0200
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1 /*
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2 * Copyright (c) 2013, 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
8ef918538e22 6313383: SA: Update jmap to support HPROF binary format "JAVA PROFILE 1.0.2"
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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
8ef918538e22 6313383: SA: Update jmap to support HPROF binary format "JAVA PROFILE 1.0.2"
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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 import java.lang.management.ManagementFactory;
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25 import java.lang.management.RuntimeMXBean;
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26 import java.lang.reflect.Field;
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27 import java.lang.reflect.Method;
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28 import java.util.ArrayList;
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29 import java.util.List;
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30
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31 import sun.management.VMManagement;
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32
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33 public class JMapHProfLargeHeapProc {
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34 private static final List<byte[]> heapGarbage = new ArrayList<>();
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35
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36 public static void main(String[] args) throws Exception {
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37
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38 buildLargeHeap(args);
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39
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40 // Print our pid on stdout
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41 System.out.println("PID[" + getProcessId() + "]");
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42
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43 // Wait for input before termination
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44 System.in.read();
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45 }
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46
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47 private static void buildLargeHeap(String[] args) {
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48 for (long i = 0; i < Integer.parseInt(args[0]); i++) {
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49 heapGarbage.add(new byte[1024]);
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50 }
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51 }
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52
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53 public static int getProcessId() throws Exception {
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54
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55 // Get the current process id using a reflection hack
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56 RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
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57 Field jvm = runtime.getClass().getDeclaredField("jvm");
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58
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59 jvm.setAccessible(true);
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60 VMManagement mgmt = (sun.management.VMManagement) jvm.get(runtime);
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61
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62 Method pid_method = mgmt.getClass().getDeclaredMethod("getProcessId");
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63
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64 pid_method.setAccessible(true);
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65
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66 int pid = (Integer) pid_method.invoke(mgmt);
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67
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68 return pid;
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69 }
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70
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71 }