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1 /*
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2 * Copyright 2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.tools;
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26
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27 import sun.jvm.hotspot.utilities.HeapHprofBinWriter;
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28 import java.io.IOException;
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29
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30 /*
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31 * This tool is used by the JDK jmap utility to dump the heap of the target
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32 * process/core as a HPROF binary file. It can also be used as a standalone
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33 * tool if required.
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34 */
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35 public class HeapDumper extends Tool {
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36
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37 private static String DEFAULT_DUMP_FILE = "heap.bin";
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38
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39 private String dumpFile;
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40
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41 public HeapDumper(String dumpFile) {
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42 this.dumpFile = dumpFile;
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43 }
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44
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45 protected void printFlagsUsage() {
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46 System.out.println(" <no option>\tto dump heap to " +
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47 DEFAULT_DUMP_FILE);
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48 System.out.println(" -f <file>\tto dump heap to <file>");
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49 super.printFlagsUsage();
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50 }
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51
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52 // use HeapHprofBinWriter to write the heap dump
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53 public void run() {
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54 System.out.println("Dumping heap to " + dumpFile + " ...");
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55 try {
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56 new HeapHprofBinWriter().write(dumpFile);
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57 System.out.println("Heap dump file created");
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58 } catch (IOException ioe) {
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59 System.err.println(ioe.getMessage());
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60 }
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61 }
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62
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63 // JDK jmap utility will always invoke this tool as:
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64 // HeapDumper -f <file> <args...>
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65 public static void main(String args[]) {
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66 String file = DEFAULT_DUMP_FILE;
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67 if (args.length > 2) {
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68 if (args[0].equals("-f")) {
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69 file = args[1];
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70 String[] newargs = new String[args.length-2];
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71 System.arraycopy(args, 2, newargs, 0, args.length-2);
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72 args = newargs;
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73 }
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74 }
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75
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76 HeapDumper dumper = new HeapDumper(file);
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77 dumper.start(args);
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78 dumper.stop();
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79 }
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80
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81 }
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