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Date:      Sat, 25 Jan 2003 11:48:14 +0100
From:      Robin Schilham <co9@xs4all.nl>
To:        Greg Lewis <glewis@eyesbeyond.com>
Cc:        freebsd-java@freebsd.org
Subject:   Re: jboss3 java core dump
Message-ID:  <3E326B6E.1080700@xs4all.nl>
In-Reply-To: <20030125060352.A39692@misty.eyesbeyond.com>
References:  <list.freebsd.java#811472746.20030113124453@ua.fm> <3E3127D3.7030907@xs4all.nl> <20030125060352.A39692@misty.eyesbeyond.com>
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Greg Lewis wrote:
> On Fri, Jan 24, 2003 at 12:47:31PM +0100, Robin Schilham wrote:
> 
>>Andriy Podanenko wrote:
>>
>>>Has anybody fix the problem ?
>>>http://www.geocrawler.com/archives/3/162/2002/12/0/10270779/
>>>and the yet one:
>>>jboss3 make java core dump on FreeBSD (5.0-RELENG)
>>>  jdk13 from ports (patchset 7)
>>>  jboss3 from ports
>>>
>>>
>>>To Unsubscribe: send mail to majordomo@FreeBSD.org
>>>with "unsubscribe freebsd-java" in the body of the message
>>
>>I had the same problem with jboss3 with jdk-1.3.1p7_2 on FreeBSD
>>5.0-RELEASE. It seems that the SIGBUS is cause by line 311 of
>>j2sdk1.3.1/src/solaris/native/java/net/InetAddressImpl.c. After
>>inserting some debugging output, it turned out that the test
>>at line 308 should be
>>     if (hp == NULL || hp == -1) {
>>instead of
>>     if (hp == NULL) {
>>Of course this should be considered as a temporary workaround.
> 
> 
> I just looked at the code in question and it seems to mix int and 
> struct hostent * with merry abandon.  Yuck.  I think a better fix is to
> change the prototype of copy_hostent on line 470 to static HOST_RETURN
> and change return (-1) to return (HOST_R_BAD) on line 504.  I haven't
> tested this yet though.  Comments?
> 

The changes that you proposed do not seem to solve the problem. The
value of hp is still -1 in some cases, which causes the SIGBUS at
line 311.

The following java class illustrates the problem:

import java.net.*;
import java.io.*;

public class Crash {
     public static void main(String[] args) {

         int port = 8083;
         InetAddress bindAddress = null;
         int backlog = 50;
         ServerSocket server = null;

         try {
             server = new ServerSocket(port, backlog, bindAddress);

             // the following statement causes a SIGBUS:
             System.out.println("Started server: " + server);
         } catch (IOException e) {
             System.out.println("caught exception: " + e);
         }
     }
}


Regards,

Robin Schilham


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