1 /* 2 * Copyright (c) 2000, 2001, 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 import java.io.*; 25 import java.util.*; 26 27 /* 28 * @test 29 * @bug 4202914 4363318 30 * @summary Basic test of serialization of stack trace information 31 * @author Josh Bloch 32 */ 33 34 public class StackTraceSerialization { 35 public static void main(String args[]) throws Exception { 36 Throwable original = null; 37 try { 38 a(); 39 } catch(HighLevelException e) { 40 original = e; 41 } 42 43 ByteArrayOutputStream bout = new ByteArrayOutputStream(); 44 ObjectOutputStream out = new ObjectOutputStream(bout); 45 out.writeObject(original); 46 out.flush(); 47 ByteArrayInputStream bin = 48 new ByteArrayInputStream(bout.toByteArray()); 49 ObjectInputStream in = new ObjectInputStream(bin); 50 Throwable clone = (Throwable) in.readObject(); 51 52 if (!equal(original, clone)) 53 throw new Exception(); 54 } 55 56 /** 57 * Returns true if e1 and e2 have equal stack traces and their causes 58 * are recursively equal (by the same definition). Returns false 59 * or throws NullPointerExeption otherwise. 60 */ 61 private static boolean equal(Throwable t1, Throwable t2) { 62 return t1==t2 || (Arrays.equals(t1.getStackTrace(), t2.getStackTrace()) 63 && equal(t1.getCause(), t2.getCause())); 64 } 65 66 static void a() throws HighLevelException { 67 try { 68 b(); 69 } catch(MidLevelException e) { 70 throw new HighLevelException(e); 71 } 72 } 73 static void b() throws MidLevelException { 74 c(); 75 } 76 static void c() throws MidLevelException { 77 try { 78 d(); 79 } catch(LowLevelException e) { 80 throw new MidLevelException(e); 81 } 82 } 83 static void d() throws LowLevelException { 84 e(); 85 } 86 static void e() throws LowLevelException { 87 throw new LowLevelException(); 88 } 89 90 private static final String OUR_CLASS = StackTraceSerialization.class.getName(); 91 private static final String OUR_FILE_NAME = "StackTraceSerialization.java"; 92 93 private static void check(StackTraceElement e, String methodName, int n) { 94 if (!e.getClassName().equals(OUR_CLASS)) 95 throw new RuntimeException("Class: " + e); 96 if (!e.getMethodName().equals(methodName)) 97 throw new RuntimeException("Method name: " + e); 98 if (!e.getFileName().equals(OUR_FILE_NAME)) 99 throw new RuntimeException("File name: " + e); 100 if (e.getLineNumber() != n) 101 throw new RuntimeException("Line number: " + e); 102 } 103 } 104 105 class HighLevelException extends Exception { 106 HighLevelException(Throwable cause) { super(cause); } 107 } 108 109 class MidLevelException extends Exception { 110 MidLevelException(Throwable cause) { super(cause); } 111 } 112 113 class LowLevelException extends Exception { 114 }