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6911258: Project Coin: Add essential API support for Automatic Resource Management (ARM) blocks

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6911261: Project Coin: Retrofit Automatic Resource Management (ARM) support onto platform APIs
6962571: Infinite loop in printing out Throwable stack traces with circular references

Reviewed-by: darcy, alanb
This commit is contained in:
Joshua Bloch 2010-06-23 17:03:40 -07:00 committed by Joe Darcy
parent af32180a74
commit 50f960454d
7 changed files with 436 additions and 63 deletions
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1
jdk/make/java/java/FILES_java.gmk
View File

@ -30,6 +30,7 @@
#
JAVA_JAVA_java = \
java/lang/Object.java \
java/lang/AutoCloseable.java \
java/lang/Class.java \
java/lang/Thread.java \
java/lang/Character.java \

5
jdk/src/share/classes/java/io/Closeable.java
View File

@ -28,14 +28,14 @@ package java.io;
import java.io.IOException;
/**
* A <tt>Closeable</tt> is a source or destination of data that can be closed.
* A {@code Closeable} is a source or destination of data that can be closed.
* The close method is invoked to release resources that the object is
* holding (such as open files).
*
* @since 1.5
*/
public interface Closeable {
public interface Closeable extends AutoCloseable {
/**
* Closes this stream and releases any system resources associated
@ -45,5 +45,4 @@ public interface Closeable {
* @throws IOException if an I/O error occurs
*/
public void close() throws IOException;
}

47
jdk/src/share/classes/java/lang/AutoCloseable.java Normal file
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@ -0,0 +1,47 @@
/*
* Copyright (c) 2009, 2010, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package java.lang;
/**
* A resource that must be closed when it is no longer needed.
*
* @author Josh Bloch
* @since 1.7
*/
public interface AutoCloseable {
/**
* Close this resource, relinquishing any underlying resources.
* This method is invoked automatically by the automatic resource
* management block construct.
*
* <p>Classes implementing this method are strongly encouraged to
* be declared to throw more specific exceptions (or no exception
* at all, if the close cannot fail).
*
* @throws Exception if this resource cannot be closed
*/
void close() throws Exception;
}

265
jdk/src/share/classes/java/lang/Throwable.java
View File

@ -25,6 +25,7 @@
package java.lang;
import java.io.*;
import java.util.*;
/**
* The <code>Throwable</code> class is the superclass of all errors and
@ -102,7 +103,7 @@ import java.io.*;
* lowLevelOp();
* } catch (LowLevelException le) {
* throw (HighLevelException)
new HighLevelException().initCause(le); // Legacy constructor
* new HighLevelException().initCause(le); // Legacy constructor
* }
* </pre>
*
@ -192,6 +193,24 @@ public class Throwable implements Serializable {
* nulled out when fillInStackTrace is called.
*/
/**
* The list of suppressed exceptions, as returned by
* {@link #getSuppressedExceptions()}.
*
* @serial
* @since 1.7
*/
private List<Throwable> suppressedExceptions = Collections.emptyList();
/** Message for trying to suppress a null exception. */
private static final String NULL_CAUSE_MESSAGE = "Cannot suppress a null exception.";
/** Caption for labeling causative exception stack traces */
private static final String CAUSE_CAPTION = "Caused by: ";
/** Caption for labeling suppressed exception stack traces */
private static final String SUPPRESSED_CAPTION = "Suppressed: ";
/**
* Constructs a new throwable with <code>null</code> as its detail message.
* The cause is not initialized, and may subsequently be initialized by a
@ -469,6 +488,52 @@ public class Throwable implements Serializable {
* class LowLevelException extends Exception {
* }
* </pre>
* As of release 7, the platform supports the notion of
* <i>suppressed exceptions</i> (in conjunction with automatic
* resource management blocks). Any exceptions that were
* suppressed in order to deliver an exception are printed out
* beneath the stack trace. The format of this information
* depends on the implementation, but the following example may be
* regarded as typical:
*
* <pre>
* Exception in thread "main" java.lang.Exception: Something happened
* at Foo.bar(Foo.java:10)
* at Foo.main(Foo.java:5)
* Suppressed: Resource$CloseFailException: Resource ID = 0
* at Resource.close(Resource.java:26)
* at Foo.bar(Foo.java:9)
* ... 1 more
* </pre>
* Note that the "... n more" notation is used on suppressed exceptions
* just at it is used on causes. Unlike causes, suppressed exceptions are
* indented beyond their "containing exceptions."
*
* <p>An exception can have both a cause and one or more suppressed
* exceptions:
* <pre>
* Exception in thread "main" java.lang.Exception: Main block
* at Foo3.main(Foo3.java:7)
* Suppressed: Resource$CloseFailException: Resource ID = 2
* at Resource.close(Resource.java:26)
* at Foo3.main(Foo3.java:5)
* Suppressed: Resource$CloseFailException: Resource ID = 1
* at Resource.close(Resource.java:26)
* at Foo3.main(Foo3.java:5)
* Caused by: java.lang.Exception: I did it
* at Foo3.main(Foo3.java:8)
* </pre>
* Likewise, a suppressed exception can have a cause:
* <pre>
* Exception in thread "main" java.lang.Exception: Main block
* at Foo4.main(Foo4.java:6)
* Suppressed: Resource2$CloseFailException: Resource ID = 1
* at Resource2.close(Resource2.java:20)
* at Foo4.main(Foo4.java:5)
* Caused by: java.lang.Exception: Rats, you caught me
* at Resource2$CloseFailException.<init>(Resource2.java:45)
* ... 2 more
* </pre>
*/
public void printStackTrace() {
printStackTrace(System.err);
@ -480,44 +545,71 @@ public class Throwable implements Serializable {
* @param s <code>PrintStream</code> to use for output
*/
public void printStackTrace(PrintStream s) {
synchronized (s) {
printStackTrace(new WrappedPrintStream(s));
}
private void printStackTrace(PrintStreamOrWriter s) {
Set<Throwable> dejaVu = new HashSet<Throwable>();
dejaVu.add(this);
synchronized (s.lock()) {
// Print our stack trace
s.println(this);
StackTraceElement[] trace = getOurStackTrace();
for (int i=0; i < trace.length; i++)
s.println("\tat " + trace[i]);
for (StackTraceElement traceElement : trace)
s.println("\tat " + traceElement);
// Print suppressed exceptions, if any
for (Throwable se : suppressedExceptions)
se.printEnclosedStackTrace(s, trace, SUPPRESSED_CAPTION, "\t", dejaVu);
// Print cause, if any
Throwable ourCause = getCause();
if (ourCause != null)
ourCause.printStackTraceAsCause(s, trace);
ourCause.printEnclosedStackTrace(s, trace, CAUSE_CAPTION, "", dejaVu);
}
}
/**
* Print our stack trace as a cause for the specified stack trace.
* Print our stack trace as an enclosed exception for the specified
* stack trace.
*/
private void printStackTraceAsCause(PrintStream s,
StackTraceElement[] causedTrace)
{
// assert Thread.holdsLock(s);
private void printEnclosedStackTrace(PrintStreamOrWriter s,
StackTraceElement[] enclosingTrace,
String caption,
String prefix,
Set<Throwable> dejaVu) {
assert Thread.holdsLock(s.lock());
if (dejaVu.contains(this)) {
s.println("\t[CIRCULAR REFERENCE:" + this + "]");
} else {
dejaVu.add(this);
// Compute number of frames in common between this and enclosing trace
StackTraceElement[] trace = getOurStackTrace();
int m = trace.length - 1;
int n = enclosingTrace.length - 1;
while (m >= 0 && n >=0 && trace[m].equals(enclosingTrace[n])) {
m--; n--;
}
int framesInCommon = trace.length - 1 - m;
// Compute number of frames in common between this and caused
StackTraceElement[] trace = getOurStackTrace();
int m = trace.length-1, n = causedTrace.length-1;
while (m >= 0 && n >=0 && trace[m].equals(causedTrace[n])) {
m--; n--;
// Print our stack trace
s.println(prefix + caption + this);
for (int i = 0; i <= m; i++)
s.println(prefix + "\tat " + trace[i]);
if (framesInCommon != 0)
s.println(prefix + "\t... " + framesInCommon + " more");
// Print suppressed exceptions, if any
for (Throwable se : suppressedExceptions)
se.printEnclosedStackTrace(s, trace, SUPPRESSED_CAPTION,
prefix +"\t", dejaVu);
// Print cause, if any
Throwable ourCause = getCause();
if (ourCause != null)
ourCause.printEnclosedStackTrace(s, trace, CAUSE_CAPTION, prefix, dejaVu);
}
int framesInCommon = trace.length - 1 - m;
s.println("Caused by: " + this);
for (int i=0; i <= m; i++)
s.println("\tat " + trace[i]);
if (framesInCommon != 0)
s.println("\t... " + framesInCommon + " more");
// Recurse if we have a cause
Throwable ourCause = getCause();
if (ourCause != null)
ourCause.printStackTraceAsCause(s, trace);
}
/**
@ -528,44 +620,51 @@ public class Throwable implements Serializable {
* @since JDK1.1
*/
public void printStackTrace(PrintWriter s) {
synchronized (s) {
s.println(this);
StackTraceElement[] trace = getOurStackTrace();
for (int i=0; i < trace.length; i++)
s.println("\tat " + trace[i]);
Throwable ourCause = getCause();
if (ourCause != null)
ourCause.printStackTraceAsCause(s, trace);
}
printStackTrace(new WrappedPrintWriter(s));
}
/**
* Print our stack trace as a cause for the specified stack trace.
* Wrapper class for PrintStream and PrintWriter to enable a single
* implementation of printStackTrace.
*/
private void printStackTraceAsCause(PrintWriter s,
StackTraceElement[] causedTrace)
{
// assert Thread.holdsLock(s);
private abstract static class PrintStreamOrWriter {
/** Returns the object to be locked when using this StreamOrWriter */
abstract Object lock();
// Compute number of frames in common between this and caused
StackTraceElement[] trace = getOurStackTrace();
int m = trace.length-1, n = causedTrace.length-1;
while (m >= 0 && n >=0 && trace[m].equals(causedTrace[n])) {
m--; n--;
/** Prints the specified string as a line on this StreamOrWriter */
abstract void println(Object o);
}
private static class WrappedPrintStream extends PrintStreamOrWriter {
private final PrintStream printStream;
WrappedPrintStream(PrintStream printStream) {
this.printStream = printStream;
}
int framesInCommon = trace.length - 1 - m;
s.println("Caused by: " + this);
for (int i=0; i <= m; i++)
s.println("\tat " + trace[i]);
if (framesInCommon != 0)
s.println("\t... " + framesInCommon + " more");
Object lock() {
return printStream;
}
// Recurse if we have a cause
Throwable ourCause = getCause();
if (ourCause != null)
ourCause.printStackTraceAsCause(s, trace);
void println(Object o) {
printStream.println(o);
}
}
private static class WrappedPrintWriter extends PrintStreamOrWriter {
private final PrintWriter printWriter;
WrappedPrintWriter(PrintWriter printWriter) {
this.printWriter = printWriter;
}
Object lock() {
return printWriter;
}
void println(Object o) {
printWriter.println(o);
}
}
/**
@ -667,10 +766,60 @@ public class Throwable implements Serializable {
*/
native StackTraceElement getStackTraceElement(int index);
private synchronized void writeObject(java.io.ObjectOutputStream s)
private void readObject(ObjectInputStream s)
throws IOException, ClassNotFoundException {
s.defaultReadObject(); // read in all fields
List<Throwable> suppressed = Collections.emptyList();
if (suppressedExceptions != null &&
!suppressedExceptions.isEmpty()) { // Copy Throwables to new list
suppressed = new ArrayList<Throwable>();
for(Throwable t : suppressedExceptions) {
if (t == null)
throw new NullPointerException(NULL_CAUSE_MESSAGE);
suppressed.add(t);
}
}
suppressedExceptions = suppressed;
}
private synchronized void writeObject(ObjectOutputStream s)
throws IOException
{
getOurStackTrace(); // Ensure that stackTrace field is initialized.
s.defaultWriteObject();
}
/**
* Adds the specified exception to the list of exceptions that
* were suppressed, typically by the automatic resource management
* statement, in order to deliver this exception.
*
* @param exception the exception to be added to the list of
* suppressed exceptions
* @throws NullPointerException if {@code exception} is null
* @since 1.7
*/
public synchronized void addSuppressedException(Throwable exception) {
if (exception == null)
throw new NullPointerException(NULL_CAUSE_MESSAGE);
if (suppressedExceptions.size() == 0)
suppressedExceptions = new ArrayList<Throwable>();
suppressedExceptions.add(exception);
}
private static final Throwable[] EMPTY_THROWABLE_ARRAY = new Throwable[0];
/**
* Returns an array containing all of the exceptions that were
* suppressed, typically by the automatic resource management
* statement, in order to deliver this exception.
*
* @return an array containing all of the exceptions that were
* suppressed to deliver this exception.
* @since 1.7
*/
public Throwable[] getSuppressedExceptions() {
return suppressedExceptions.toArray(EMPTY_THROWABLE_ARRAY);
}
}

13
jdk/src/share/classes/java/nio/channels/FileLock.java
View File

@ -116,7 +116,7 @@ import java.io.IOException;
* @since 1.4
*/
public abstract class FileLock {
public abstract class FileLock implements AutoCloseable {
private final Channel channel;
private final long position;
@ -298,6 +298,17 @@ public abstract class FileLock {
*/
public abstract void release() throws IOException;
/**
* This method invokes the {@link #release} method. It was added
* to the class so that it could be used in conjunction with the
* automatic resource management block construct.
*
* @since 1.7
*/
public final void close() throws IOException {
release();
}
/**
* Returns a string describing the range, type, and validity of this lock.
*

3
jdk/src/share/classes/javax/imageio/stream/ImageInputStream.java
View File

@ -25,6 +25,7 @@
package javax.imageio.stream;
import java.io.Closeable;
import java.io.DataInput;
import java.io.IOException;
import java.nio.ByteOrder;
@ -42,7 +43,7 @@ import java.nio.ByteOrder;
* @see MemoryCacheImageInputStream
*
*/
public interface ImageInputStream extends DataInput {
public interface ImageInputStream extends DataInput, Closeable {
/**
* Sets the desired byte order for future reads of data values

165
jdk/test/java/lang/Throwable/SuppressedExceptions.java Normal file
View File

@ -0,0 +1,165 @@
/*
* Copyright (c) 2010, 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
* @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 {
basicSupressionTest();
serializationTest();
selfReference();
}
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.getSuppressedExceptions();
if (t0.length != 0) {
throw new RuntimeException(message);
}
throwable.printStackTrace();
throwable.addSuppressedException(suppressed);
Throwable[] t1 = throwable.getSuppressedExceptions();
if (t1.length != 1 ||
t1[0] != suppressed) {throw new RuntimeException(message);
}
throwable.printStackTrace();
throwable.addSuppressedException(repressed);
Throwable[] t2 = throwable.getSuppressedExceptions();
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,
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(byte)0x3b, (byte)0x78, (byte)0x70, (byte)0x71, (byte)0x00, (byte)0x7e, (byte)0x00, (byte)0x04,
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(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,
};
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.getSuppressedExceptions();
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.addSuppressedException(throwable1);
throwable1.addSuppressedException(throwable2);
throwable1.printStackTrace();
}
}