amd64/134757: 32 bit processes on 64 bit platforms occasionally drop core with bad ds reg

Stephen Sanders ssanders at opnet.com
Thu May 21 17:00:16 UTC 2009


The following reply was made to PR amd64/134757; it has been noted by GNATS.

From: Stephen Sanders <ssanders at opnet.com>
To: John Baldwin <jhb at freebsd.org>
Cc: freebsd-amd64 at freebsd.org, freebsd-gnats-submit at freebsd.org
Subject: Re: amd64/134757: 32 bit processes on 64 bit platforms occasionally
 drop core with bad ds reg
Date: Thu, 21 May 2009 12:31:01 -0400

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 I've not tried this under 7.x yet but do plan on doing so within the
 next few weeks or so.
 
 Unfortunately, I'm sort of stuck with this 6.3 32 bit/64 bit 
 arrangement for the next 6 months or more as we've a number of systems
 deployed.
 
 Thanks for the reply.
 
 John Baldwin wrote:
 > On Wednesday 20 May 2009 11:52:45 am Stephen Sanders wrote:
 >   
 >>> Number:         134757
 >>> Category:       amd64
 >>> Synopsis:       32 bit processes on 64 bit platforms occasionally drop core 
 >>>       
 > with bad  ds reg
 >   
 >>> Confidential:   no
 >>> Severity:       non-critical
 >>> Priority:       medium
 >>> Responsible:    freebsd-amd64
 >>> State:          open
 >>> Quarter:        
 >>> Keywords:       
 >>> Date-Required:
 >>> Class:          sw-bug
 >>> Submitter-Id:   current-users
 >>> Arrival-Date:   Wed May 20 16:00:12 UTC 2009
 >>> Closed-Date:
 >>> Last-Modified:
 >>> Originator:     Stephen Sanders
 >>> Release:        6.3 Release amd64
 >>> Organization:
 >>>       
 >> OPNET
 >>     
 >>> Environment:
 >>>       
 >> FreeBSD alt-4100-2.lab.opnet.com 6.3-RELEASE FreeBSD 6.3-RELEASE #0: Tue Mar 
 >>     
 > 31 14:11:07 PDT 2009     
 > pmai at focus7.networkphysics.com:/u1/builds/ping/NP/FreeBSD/package/NPbabkernel/bld-tmp/sys/amd64/compile/NPBAB  
 > amd64
 >   
 >>> Description:
 >>>       
 >> With fair regularity, we have 32 bit processes dropping core on 64 bit 
 >>     
 > systems.  In particular perl and bash.
 >   
 >> Our system is definitely a hybrid but that aspect appears to not be the 
 >>     
 > issue.  The system works properly more than not.
 >   
 >> I have attached a file containing 2 gdb sessions. One session is looking at 
 >>     
 > a core that bash left behind and the other is looking at a bash session with 
 > no core.
 >
 > Have you tested this on 7 at all?  At this point most developers are probably 
 > much more inclined to fix this for 8.0 and 7.x rather than 6.x.
 >
 >   
 
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 I've not tried this under 7.x yet but do plan on doing so within the
 next few weeks or so.<br>
 <br>
 Unfortunately, I'm sort of stuck with this 6.3 32 bit/64 bit&nbsp;
 arrangement for the next 6 months or more as we've a number of systems
 deployed.<br>
 <br>
 Thanks for the reply.<br>
 <br>
 John Baldwin wrote:
 <blockquote cite="mid:200905211221.00654.jhb at freebsd.org" type="cite">
   <pre wrap="">On Wednesday 20 May 2009 11:52:45 am Stephen Sanders wrote:
   </pre>
   <blockquote type="cite">
     <blockquote type="cite">
       <pre wrap="">Number:         134757
 Category:       amd64
 Synopsis:       32 bit processes on 64 bit platforms occasionally drop core 
       </pre>
     </blockquote>
   </blockquote>
   <pre wrap=""><!---->with bad  ds reg
   </pre>
   <blockquote type="cite">
     <blockquote type="cite">
       <pre wrap="">Confidential:   no
 Severity:       non-critical
 Priority:       medium
 Responsible:    freebsd-amd64
 State:          open
 Quarter:        
 Keywords:       
 Date-Required:
 Class:          sw-bug
 Submitter-Id:   current-users
 Arrival-Date:   Wed May 20 16:00:12 UTC 2009
 Closed-Date:
 Last-Modified:
 Originator:     Stephen Sanders
 Release:        6.3 Release amd64
 Organization:
       </pre>
     </blockquote>
     <pre wrap="">OPNET
     </pre>
     <blockquote type="cite">
       <pre wrap="">Environment:
       </pre>
     </blockquote>
     <pre wrap="">FreeBSD alt-4100-2.lab.opnet.com 6.3-RELEASE FreeBSD 6.3-RELEASE #0: Tue Mar 
     </pre>
   </blockquote>
   <pre wrap=""><!---->31 14:11:07 PDT 2009     
 <a class="moz-txt-link-abbreviated" href="mailto:pmai at focus7.networkphysics.com:/u1/builds/ping/NP/FreeBSD/package/NPbabkernel/bld-tmp/sys/amd64/compile/NPBAB">pmai at focus7.networkphysics.com:/u1/builds/ping/NP/FreeBSD/package/NPbabkernel/bld-tmp/sys/amd64/compile/NPBAB</a>  
 amd64
   </pre>
   <blockquote type="cite">
     <blockquote type="cite">
       <pre wrap="">Description:
       </pre>
     </blockquote>
     <pre wrap="">With fair regularity, we have 32 bit processes dropping core on 64 bit 
     </pre>
   </blockquote>
   <pre wrap=""><!---->systems.  In particular perl and bash.
   </pre>
   <blockquote type="cite">
     <pre wrap="">Our system is definitely a hybrid but that aspect appears to not be the 
     </pre>
   </blockquote>
   <pre wrap=""><!---->issue.  The system works properly more than not.
   </pre>
   <blockquote type="cite">
     <pre wrap="">I have attached a file containing 2 gdb sessions. One session is looking at 
     </pre>
   </blockquote>
   <pre wrap=""><!---->a core that bash left behind and the other is looking at a bash session with 
 no core.
 
 Have you tested this on 7 at all?  At this point most developers are probably 
 much more inclined to fix this for 8.0 and 7.x rather than 6.x.
 
   </pre>
 </blockquote>
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