1 /* 2 * Copyright (c) 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 package jdk.test.lib.hprof; 25 26 import java.io.BufferedOutputStream; 27 import java.io.File; 28 import java.io.FileOutputStream; 29 import java.io.PrintStream; 30 31 import jdk.test.lib.hprof.model.Snapshot; 32 import jdk.test.lib.hprof.parser.Reader; 33 34 /** 35 * Helper class to parse a java heap dump file. 36 */ 37 public class HprofParser { 38 39 public static void main(String[] args) throws Exception { 40 if (args.length < 1) { 41 System.out.println("No arguments supplied"); 42 } 43 File dump = new File(args[0]); 44 if (!dump.exists() || !dump.isFile()) { 45 throw new RuntimeException("The dump file does not exist or not a file"); 46 } 47 parse(dump); 48 } 49 50 /** 51 * @see #parse(File, boolean, boolean, boolean) 52 */ 53 public static File parse(File dump) throws Exception { 54 return parse(dump, false, true, true); 55 } 56 57 /** 58 * @see #parse(File, boolean, boolean, boolean) 59 */ 60 public static File parseWithDebugInfo(File dump) throws Exception { 61 return parse(dump, true, true, true); 62 } 63 64 /** 65 * Parse a java heap dump file 66 * 67 * @param dump Heap dump file to parse 68 * @param debug Turn on/off debug file parsing 69 * @param callStack Turn on/off tracking of object allocation call stack 70 * @param calculateRefs Turn on/off tracking object allocation call stack 71 * @throws Exception 72 * @return File containing output from the parser 73 */ 74 public static File parse(File dump, boolean debug, boolean callStack, boolean calculateRefs) throws Exception { 75 File out = new File("hprof." + System.currentTimeMillis() + ".out"); 76 if (out.exists()) { 77 out.delete(); 78 } 79 80 PrintStream psSystemOut = System.out; 81 try (PrintStream psHprof = new PrintStream(new BufferedOutputStream(new FileOutputStream(out.getAbsolutePath())))) { 82 System.setOut(psHprof); 83 84 int debugLevel = debug ? 2 : 0; 85 try (Snapshot snapshot = Reader.readFile(dump.getAbsolutePath(), callStack, debugLevel)) { 86 System.out.println("Snapshot read, resolving..."); 87 snapshot.resolve(calculateRefs); 88 System.out.println("Snapshot resolved."); 89 } 90 } finally { 91 System.setOut(psSystemOut); 92 } 93 94 return out; 95 } 96 97 }