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 { | 1 /* 2 * Copyright (c) 2000, 2010, 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 6991528 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 testWithSetStackTrace(); 37 testWithFillInStackTrace(); 38 } 39 40 private static void testWithSetStackTrace() { 41 Throwable t = new Throwable(); 42 t.setStackTrace(null); // Immutable and empty stack 43 assertEmptyStackTrace(t); 44 45 t.fillInStackTrace(); 46 // Verify fillInStackTrace is now a no-op. 47 assertEmptyStackTrace(t); 48 49 t.setStackTrace(new StackTrace[] {new StackTraceElement("foo", "bar", "baz", -1)}); 50 assertEmptyStackTrace(t); 51 52 if (!equal(t, reconstitute(t))) 53 throw new Exception("Unequal Throwables with set stacktrace"); 54 } 55 56 private static void assertEmptyStackTrace(Throwable t) { 57 if (t.getStackTrace.length != 0) 58 throw new AssertionError("Nonempty stacktrace."); 59 } 60 61 private static void testWithFillInStackTrace() { 62 Throwable original = null; 63 try { 64 a(); 65 } catch(HighLevelException e) { 66 original = e; 67 } 68 69 if (!equal(original, reconstitute(original))) 70 throw new Exception("Unequal Throwables with filled-in stacktrace"); 71 } 72 73 74 /** 75 * Serialize the argument and return the deserialized result. 76 */ 77 private static Throwable reconstitute(Throwable t) { 78 Throwable result = null; 79 ByteArrayOutputStream bout = new ByteArrayOutputStream(); 80 ObjectOutputStream out = new ObjectOutputStream(bout); 81 out.writeObject(t); 82 out.flush(); 83 ByteArrayInputStream bin = 84 new ByteArrayInputStream(bout.toByteArray()); 85 o ObjectInputStream in = new ObjectInputStream(bin); 86 result = (Throwable) in.readObject(); 87 return result; 88 } 89 90 /** 91 * Returns true if e1 and e2 have equal stack traces and their 92 * causes are recursively equal (by the same definition) and their 93 * suppressed exception information is equals. Returns false or 94 * throws NullPointerExeption otherwise. 95 */ 96 private static boolean equal(Throwable t1, Throwable t2) { 97 return t1==t2 || 98 (Arrays.equals(t1.getStackTrace(), t2.getStackTrace()) && 99 equal(t1.getCause(), t2.getCause()) && 100 Objects.equals(t1.getSuppressed(), t2.getSuppressed())); 101 } 102 103 static void a() throws HighLevelException { 104 try { 105 b(); 106 } catch(MidLevelException e) { 107 throw new HighLevelException(e); 108 } 109 } 110 static void b() throws MidLevelException { 111 c(); 112 } 113 static void c() throws MidLevelException { 114 try { 115 d(); 116 } catch(LowLevelException e) { 117 throw new MidLevelException(e); 118 } 119 } 120 static void d() throws LowLevelException { |