8012044: Give more information about self-suppression from Throwable.addSuppressed
Reviewed-by: alanb, dholmes
/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.*;
import java.util.*;
/*
* @test
* @bug 6911258 6962571 6963622 6991528 7005628 8012044
* @summary Basic tests of suppressed exceptions
* @author Joseph D. Darcy
*/
public class SuppressedExceptions {
private static String message = "Bad suppressed exception information";
public static void main(String... args) throws Exception {
noSelfSuppression();
basicSupressionTest();
serializationTest();
selfReference();
noModification();
initCausePlumbing();
}
private static void noSelfSuppression() {
Throwable throwable = new Throwable();
try {
throwable.addSuppressed(throwable);
throw new RuntimeException("IllegalArgumentException for self-suppresion not thrown.");
} catch (IllegalArgumentException iae) {
// Expected to be here
if (iae.getCause() != throwable)
throw new RuntimeException("Bad cause after self-suppresion.");
}
}
private static void basicSupressionTest() {
Throwable throwable = new Throwable();
RuntimeException suppressed = new RuntimeException("A suppressed exception.");
AssertionError repressed = new AssertionError("A repressed error.");
Throwable[] t0 = throwable.getSuppressed();
if (t0.length != 0) {
throw new RuntimeException(message);
}
throwable.printStackTrace();
throwable.addSuppressed(suppressed);
Throwable[] t1 = throwable.getSuppressed();
if (t1.length != 1 ||
t1[0] != suppressed) {throw new RuntimeException(message);
}
throwable.printStackTrace();
throwable.addSuppressed(repressed);
Throwable[] t2 = throwable.getSuppressed();
if (t2.length != 2 ||
t2[0] != suppressed ||
t2[1] != repressed) {
throw new RuntimeException(message);
}
throwable.printStackTrace();
}
private static void serializationTest() throws Exception {
/*
* Bytes of the serial form of
*
* (new Throwable())setStackTrace(new StackTraceElement[0])
*
* from JDK 6; suppressedException field will be missing and
* thus default to null upon deserialization.
*/
byte[] bytes = {
(byte)0xac, (byte)0xed, (byte)0x00, (byte)0x05, (byte)0x73, (byte)0x72, (byte)0x00, (byte)0x13,
(byte)0x6a, (byte)0x61, (byte)0x76, (byte)0x61, (byte)0x2e, (byte)0x6c, (byte)0x61, (byte)0x6e,
(byte)0x67, (byte)0x2e, (byte)0x54, (byte)0x68, (byte)0x72, (byte)0x6f, (byte)0x77, (byte)0x61,
(byte)0x62, (byte)0x6c, (byte)0x65, (byte)0xd5, (byte)0xc6, (byte)0x35, (byte)0x27, (byte)0x39,
(byte)0x77, (byte)0xb8, (byte)0xcb, (byte)0x03, (byte)0x00, (byte)0x03, (byte)0x4c, (byte)0x00,
(byte)0x05, (byte)0x63, (byte)0x61, (byte)0x75, (byte)0x73, (byte)0x65, (byte)0x74, (byte)0x00,
(byte)0x15, (byte)0x4c, (byte)0x6a, (byte)0x61, (byte)0x76, (byte)0x61, (byte)0x2f, (byte)0x6c,
(byte)0x61, (byte)0x6e, (byte)0x67, (byte)0x2f, (byte)0x54, (byte)0x68, (byte)0x72, (byte)0x6f,
(byte)0x77, (byte)0x61, (byte)0x62, (byte)0x6c, (byte)0x65, (byte)0x3b, (byte)0x4c, (byte)0x00,
(byte)0x0d, (byte)0x64, (byte)0x65, (byte)0x74, (byte)0x61, (byte)0x69, (byte)0x6c, (byte)0x4d,
(byte)0x65, (byte)0x73, (byte)0x73, (byte)0x61, (byte)0x67, (byte)0x65, (byte)0x74, (byte)0x00,
(byte)0x12, (byte)0x4c, (byte)0x6a, (byte)0x61, (byte)0x76, (byte)0x61, (byte)0x2f, (byte)0x6c,
(byte)0x61, (byte)0x6e, (byte)0x67, (byte)0x2f, (byte)0x53, (byte)0x74, (byte)0x72, (byte)0x69,
(byte)0x6e, (byte)0x67, (byte)0x3b, (byte)0x5b, (byte)0x00, (byte)0x0a, (byte)0x73, (byte)0x74,
(byte)0x61, (byte)0x63, (byte)0x6b, (byte)0x54, (byte)0x72, (byte)0x61, (byte)0x63, (byte)0x65,
(byte)0x74, (byte)0x00, (byte)0x1e, (byte)0x5b, (byte)0x4c, (byte)0x6a, (byte)0x61, (byte)0x76,
(byte)0x61, (byte)0x2f, (byte)0x6c, (byte)0x61, (byte)0x6e, (byte)0x67, (byte)0x2f, (byte)0x53,
(byte)0x74, (byte)0x61, (byte)0x63, (byte)0x6b, (byte)0x54, (byte)0x72, (byte)0x61, (byte)0x63,
(byte)0x65, (byte)0x45, (byte)0x6c, (byte)0x65, (byte)0x6d, (byte)0x65, (byte)0x6e, (byte)0x74,
(byte)0x3b, (byte)0x78, (byte)0x70, (byte)0x71, (byte)0x00, (byte)0x7e, (byte)0x00, (byte)0x04,
(byte)0x70, (byte)0x75, (byte)0x72, (byte)0x00, (byte)0x1e, (byte)0x5b, (byte)0x4c, (byte)0x6a,
(byte)0x61, (byte)0x76, (byte)0x61, (byte)0x2e, (byte)0x6c, (byte)0x61, (byte)0x6e, (byte)0x67,
(byte)0x2e, (byte)0x53, (byte)0x74, (byte)0x61, (byte)0x63, (byte)0x6b, (byte)0x54, (byte)0x72,
(byte)0x61, (byte)0x63, (byte)0x65, (byte)0x45, (byte)0x6c, (byte)0x65, (byte)0x6d, (byte)0x65,
(byte)0x6e, (byte)0x74, (byte)0x3b, (byte)0x02, (byte)0x46, (byte)0x2a, (byte)0x3c, (byte)0x3c,
(byte)0xfd, (byte)0x22, (byte)0x39, (byte)0x02, (byte)0x00, (byte)0x00, (byte)0x78, (byte)0x70,
(byte)0x00, (byte)0x00, (byte)0x00, (byte)0x00, (byte)0x78, (byte)0xac, (byte)0xed, (byte)0x00,
(byte)0x05, (byte)0x73, (byte)0x72, (byte)0x00, (byte)0x13, (byte)0x6a, (byte)0x61, (byte)0x76,
(byte)0x61, (byte)0x2e, (byte)0x6c, (byte)0x61, (byte)0x6e, (byte)0x67, (byte)0x2e, (byte)0x54,
(byte)0x68, (byte)0x72, (byte)0x6f, (byte)0x77, (byte)0x61, (byte)0x62, (byte)0x6c, (byte)0x65,
(byte)0xd5, (byte)0xc6, (byte)0x35, (byte)0x27, (byte)0x39, (byte)0x77, (byte)0xb8, (byte)0xcb,
(byte)0x03, (byte)0x00, (byte)0x03, (byte)0x4c, (byte)0x00, (byte)0x05, (byte)0x63, (byte)0x61,
(byte)0x75, (byte)0x73, (byte)0x65, (byte)0x74, (byte)0x00, (byte)0x15, (byte)0x4c, (byte)0x6a,
(byte)0x61, (byte)0x76, (byte)0x61, (byte)0x2f, (byte)0x6c, (byte)0x61, (byte)0x6e, (byte)0x67,
(byte)0x2f, (byte)0x54, (byte)0x68, (byte)0x72, (byte)0x6f, (byte)0x77, (byte)0x61, (byte)0x62,
(byte)0x6c, (byte)0x65, (byte)0x3b, (byte)0x4c, (byte)0x00, (byte)0x0d, (byte)0x64, (byte)0x65,
(byte)0x74, (byte)0x61, (byte)0x69, (byte)0x6c, (byte)0x4d, (byte)0x65, (byte)0x73, (byte)0x73,
(byte)0x61, (byte)0x67, (byte)0x65, (byte)0x74, (byte)0x00, (byte)0x12, (byte)0x4c, (byte)0x6a,
(byte)0x61, (byte)0x76, (byte)0x61, (byte)0x2f, (byte)0x6c, (byte)0x6e, (byte)0x67, (byte)0x3b,
(byte)0x61, (byte)0x6e, (byte)0x67, (byte)0x2f, (byte)0x53, (byte)0x74, (byte)0x72, (byte)0x69,
(byte)0x5b, (byte)0x00, (byte)0x0a, (byte)0x73, (byte)0x74, (byte)0x61, (byte)0x63, (byte)0x6b,
(byte)0x54, (byte)0x72, (byte)0x61, (byte)0x63, (byte)0x65, (byte)0x74, (byte)0x00, (byte)0x1e,
(byte)0x5b, (byte)0x4c, (byte)0x6a, (byte)0x61, (byte)0x76, (byte)0x61, (byte)0x2f, (byte)0x6c,
(byte)0x61, (byte)0x6e, (byte)0x67, (byte)0x2f, (byte)0x53, (byte)0x74, (byte)0x61, (byte)0x63,
(byte)0x6b, (byte)0x54, (byte)0x72, (byte)0x61, (byte)0x63, (byte)0x65, (byte)0x45, (byte)0x6c,
(byte)0x65, (byte)0x6d, (byte)0x65, (byte)0x6e, (byte)0x74, (byte)0x3b, (byte)0x78, (byte)0x70,
(byte)0x71, (byte)0x00, (byte)0x7e, (byte)0x00, (byte)0x04, (byte)0x70, (byte)0x75, (byte)0x72,
(byte)0x00, (byte)0x1e, (byte)0x5b, (byte)0x4c, (byte)0x6a, (byte)0x61, (byte)0x76, (byte)0x61,
(byte)0x2e, (byte)0x6c, (byte)0x61, (byte)0x6e, (byte)0x67, (byte)0x2e, (byte)0x53, (byte)0x74,
(byte)0x61, (byte)0x63, (byte)0x6b, (byte)0x54, (byte)0x72, (byte)0x61, (byte)0x63, (byte)0x65,
(byte)0x45, (byte)0x6c, (byte)0x65, (byte)0x6d, (byte)0x65, (byte)0x6e, (byte)0x74, (byte)0x3b,
(byte)0x02, (byte)0x46, (byte)0x2a, (byte)0x3c, (byte)0x3c, (byte)0xfd, (byte)0x22, (byte)0x39,
(byte)0x02, (byte)0x00, (byte)0x00, (byte)0x78, (byte)0x70,
};
try(ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
ObjectInputStream ois = new ObjectInputStream(bais)) {
Object o = ois.readObject();
Throwable throwable = (Throwable) o;
System.err.println("TESTING SERIALIZED EXCEPTION");
Throwable[] t0 = throwable.getSuppressed();
if (t0.length != 0) { // Will fail if t0 is null.
throw new RuntimeException(message);
}
throwable.printStackTrace();
}
}
private static void selfReference() {
Throwable throwable1 = new RuntimeException();
Throwable throwable2 = new AssertionError();
throwable1.initCause(throwable2);
throwable2.initCause(throwable1);
throwable1.printStackTrace();
throwable1.addSuppressed(throwable2);
throwable2.addSuppressed(throwable1);
throwable1.printStackTrace();
}
private static void noModification() {
Throwable t = new NoSuppression(false);
Throwable[] t0 = t.getSuppressed();
if (t0.length != 0)
throw new RuntimeException("Bad nonzero length of suppressed exceptions.");
t.addSuppressed(new ArithmeticException());
// Make sure a suppressed exception did *not* get added.
t0 = t.getSuppressed();
if (t0.length != 0)
throw new RuntimeException("Bad nonzero length of suppressed exceptions.");
Throwable suppressed = new ArithmeticException();
t = new NoSuppression(true); // Suppression enabled
// Make sure addSuppressed(null) throws an NPE
try {
t.addSuppressed(null);
throw new RuntimeException("NPE not thrown!");
} catch(NullPointerException e) {
; // Expected
}
t.addSuppressed(suppressed);
t0 = t.getSuppressed();
if (t0.length != 1 || t0[0] != suppressed)
throw new RuntimeException("Expected suppression did not occur.");
}
private static class NoSuppression extends Throwable {
public NoSuppression(boolean enableSuppression) {
super("The medium.", null, enableSuppression, true);
}
}
private static void initCausePlumbing() {
Throwable t1 = new Throwable();
Throwable t2 = new Throwable("message", t1);
Throwable t3 = new Throwable();
try {
t2.initCause(t3);
throw new RuntimeException("Shouldn't reach.");
} catch (IllegalStateException ise) {
if (ise.getCause() != t2)
throw new RuntimeException("Unexpected cause in ISE", ise);
Throwable[] suppressed = ise.getSuppressed();
if (suppressed.length != 0)
throw new RuntimeException("Bad suppression in ISE", ise);
}
try {
t2.initCause(null);
throw new RuntimeException("Shouldn't reach.");
} catch (IllegalStateException ise) {
; // Expected; don't want an NPE.
}
try {
t3.initCause(t3);
throw new RuntimeException("Shouldn't reach.");
} catch (IllegalArgumentException iae) {
if (iae.getCause() != t3)
throw new RuntimeException("Unexpected cause in ISE", iae);
}
}
}