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From "Mikhail Markov (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-4996) [classlib][luni] Incorrect deserialization of Externalizable classes
Date Wed, 05 Dec 2007 18:55:43 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-4996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mikhail Markov updated HARMONY-4996:
------------------------------------

    Attachment: H-4996.patch

Here is the patch fixing the issue.

> [classlib][luni] Incorrect deserialization of Externalizable classes
> --------------------------------------------------------------------
>
>                 Key: HARMONY-4996
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4996
>             Project: Harmony
>          Issue Type: Bug
>          Components: App-Oriented Bug Reports, Classlib
>         Environment: Win XP
>            Reporter: Mikhail Markov
>            Assignee: Mikhail Markov
>         Attachments: H-4996.patch
>
>
> The testcase below passed on RI but failed on Harmony with the following stacktrace:
> java.io.StreamCorruptedException: Wrong format: 0x0
>         at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:842)
>         at java.io.ObjectInputStream.readObject(ObjectInputStream.java:2128)
>         at java.io.ObjectInputStream.readObject(ObjectInputStream.java:283)
>         at Test.main(Test.java:18)
> --------------------------- Test.java --------------------------------
> import java.io.*;
> public class Test {
>     static ObjectStreamClass[] objs = new ObjectStreamClass[1000];
>     static int pos = 0;
>     public static void main(String[] args) {
>         try {
>             PipedOutputStream pout = new PipedOutputStream();
>             PipedInputStream pin = new PipedInputStream(pout);
>             ObjectOutputStream oout = new TestObjectOutputStream(pout);
>             oout.writeObject(new TestExtObject());
>             oout.writeObject("test");
>             oout.close();
>             pos = 0;
>             ObjectInputStream oin = new TestObjectInputStream(pin);
>             oin.readObject();
>             oin.readObject();
>             System.out.println("Done.");
>         } catch (Exception ex) { 
>             ex.printStackTrace();
>         }
>     }
>     public static class TestExtObject implements Externalizable {
>         public void writeExternal(ObjectOutput out) throws IOException {
>             out.writeInt(10);
>         }
>         public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
{
>             in.readInt();
>         }
>     }
>     static class TestObjectOutputStream extends ObjectOutputStream {
>         public TestObjectOutputStream(OutputStream out) throws IOException {
>             super(out);
>         }
>         protected void writeClassDescriptor(ObjectStreamClass osc) throws IOException
{
>             objs[pos++] = osc;        }
>     }
>     static class TestObjectInputStream extends ObjectInputStream {
>         public TestObjectInputStream(InputStream in) throws IOException {
>             super(in);
>         }
>         protected ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException
{
>             return (ObjectStreamClass) objs[pos++];
>         }
>     }
> }
> -------------------------------------------------------------------------
> This test actually saves the incoming ObjectStreamClass-es in local array and does not
write them to ObjectOutputStream (and takes them from this array in de-serialization). It
seems like Externalizable class does not properly de-serialized as the exception occured during
the next readObject() call.

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