1 /* 2 * Copyright (c) 2005, 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 package sun.jvm.hotspot.tools; 26 27 import sun.jvm.hotspot.utilities.HeapHprofBinWriter; 28 import sun.jvm.hotspot.debugger.JVMDebugger; 29 import java.io.IOException; 30 31 /* 32 * This tool is used by the JDK jmap utility to dump the heap of the target 33 * process/core as a HPROF binary file. It can also be used as a standalone 34 * tool if required. 35 */ 36 public class HeapDumper extends Tool { 37 38 private static String DEFAULT_DUMP_FILE = "heap.bin"; 39 40 private String dumpFile; 41 42 public HeapDumper(String dumpFile) { 43 this.dumpFile = dumpFile; 44 } 45 46 public HeapDumper(String dumpFile, JVMDebugger d) { 47 super(d); 48 this.dumpFile = dumpFile; 49 } 50 51 protected void printFlagsUsage() { 52 System.out.println(" <no option>\tto dump heap to " + 53 DEFAULT_DUMP_FILE); 54 System.out.println(" -f <file>\tto dump heap to <file>"); 55 super.printFlagsUsage(); 56 } 57 58 // use HeapHprofBinWriter to write the heap dump 59 public void run() { 60 System.out.println("Dumping heap to " + dumpFile + " ..."); 61 try { 62 new HeapHprofBinWriter().write(dumpFile); 63 System.out.println("Heap dump file created"); 64 } catch (IOException ioe) { 65 System.err.println(ioe.getMessage()); 66 } 67 } 68 69 // JDK jmap utility will always invoke this tool as: 70 // HeapDumper -f <file> <args...> 71 public static void main(String args[]) { 72 String file = DEFAULT_DUMP_FILE; 73 if (args.length > 2) { 74 if (args[0].equals("-f")) { 75 file = args[1]; 76 String[] newargs = new String[args.length-2]; 77 System.arraycopy(args, 2, newargs, 0, args.length-2); 78 args = newargs; 79 } 80 } 81 82 HeapDumper dumper = new HeapDumper(file); 83 dumper.start(args); 84 dumper.stop(); 85 } 86 87 }