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Date: Mon, 04 Nov 2002 04:06:00 -0000
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Subject: java/8447: java/lang/Thread.java:0: Internal error: Segmentation fault
X-SW-Source: 2002-11/txt/msg00149.txt.bz2
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>Number:         8447
>Category:       java
>Synopsis:       java/lang/Thread.java:0: Internal error: Segmentation fault
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Nov 04 04:06:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     vruiz@ual.es
>Release:        gcc version 2.95.4 20011002 (Debian prerelease)
>Organization:
>Environment:
Linux version 2.2.20 (herbert@gondolin) (gcc version 2.7.2.3) #1 Sun Nov 4 15:44:23 EST 2001
Debian GNU/Linux testing/unstable gogh.ace.ual.es
>Description:
I found these error compiling the file:

import java.io.InputStream;
import java.io.OutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

public class ShortToFloat extends GenericProducerAndConsumer {
    ShortToFloat(InputStream input, OutputStream output) {
        super(input,output);
    }

    protected void ProduceAndConsume() {
        int verbosity = 2;
        DataInputStream dataInput = new DataInputStream(input);
        DataOutputStream dataOutput = new DataOutputStream(output);

        try {
            for(;;) {
                int x = dataInput.readShort();
                float y = x;
                dataOutput.writeFloat(y);
            }
        } catch (IOException e) {
            if(verbosity > 0) {
                System.err.println("ShortToFloat: EOF reached");
                if(verbosity > 1) {
                    e.printStackTrace();
                }
            }
            try {
                dataOutput.flush();
            } catch (IOException ee) {}
        }
    }

    public static void main(String[] args) {
        if(args.length > 0) {
            System.err.println("ShortToFloat < ShortFile > FloatFile");
        } else {
            DataInputStream input = new DataInputStream(System.in);
            DataOutputStream output = new DataOutputStream(System.out);
            ShortToFloat converter = new ShortToFloat(input,output);
            converter.start();
        }
    }
}

The father file GenericProducerAndConsumer.java is:

import java.io.InputStream;
import java.io.OutputStream;

public abstract class GenericProducerAndConsumer implements Runnable {
    InputStream input;
    OutputStream output;
    Thread theThread;

    /* El constructor lanza el thread */
    public GenericProducerAndConsumer(InputStream input, OutputStream output) {
        this.input = input;
        this.output = output;
        theThread = new Thread(this);
    }

    /* Lanza el hilo productor/consumidor */
    public void start() {
        theThread.start();
    }
    
    /* Funci'on espec'ifica de producci'on de datos */
    protected abstract void ProduceAndConsume();
    
    /* Lanza la producci'on de datos */
    public void run() {
        ProduceAndConsume();
    }
}

The compiling line is:

 gcj -c ShortToFloat.java

And the output is:

ShortToFloat.java:0: warning: Source file for class `GenericProducerAndConsumer' is newer than its matching class file. Source file used instead
java/lang/Thread.java:0: Internal error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.


I hope this help.

Vicente.
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: