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Date: Wed, 11 Aug 2004 22:40:41 GMT
From: Ernie Smallis <esmallis@stbernard.com>
To: freebsd-gnats-submit@FreeBSD.org
Subject: Re-Open 33262? - gdb does not handle pending signals properly when single stepping during a remote debug session.
X-Send-Pr-Version: www-2.3

>Number:         70330
>Category:       i386
>Synopsis:       Re-Open 33262? - gdb does not handle pending signals properly when single stepping during a remote debug session.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Aug 11 22:50:22 GMT 2004
>Closed-Date:    
>Last-Modified:  Mon Feb 21 18:46:28 UTC 2011
>Originator:     Ernie Smallis
>Release:        5.2.1, 5.2.CURRENT
>Organization:
St. Bernard Software (San Diego, CA)
>Environment:
uname -snrmv

FreeBSD gromit.rapid.stbernard.com 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #0: Mon Feb 23 20:45:55 GMT 2004     root@wv1u.btc.adaptec.com:/usr/obj/usr/src/sys/GENERIC  i386   
>Description:
I am seeing a similar problem in both 5.2.1 and 5.2 current.
I am receiving a SIGSEGV for gdb during a remote kernel debug session.

The messages are:

1. From infrun.c	Program received signal SIGSEGV, Segmentation fault.
2. From remote.c	Can't send signals to this remote system.  SIGSEGV not sent.

#2 I can understand because the host gdb is bombing.

#1 is possibly bombing for a stack overflow?

When the host is signalled, process_event_stop_test( ) in infrun.c is called and I expect that either remote_wait( ) or remote_async_wait( ) are called as part of telling the world that gdb has crashed.

It also appears that handle_inferior_event( ) is where we pick this up.  I haven't debugged any further and would like to know your opinion and get some direction.
>How-To-Repeat:
If you use the remote gdb to debug a target kernel and you continually step and/or set a breakpoint and continue in any way, you will receive the above messages.

Thanks for any info./help you can provide.

Ernie ;-) 

Ernest Smallis
Sr. Software Engineer
RAPID Development
esmallis@stbernard.com
858-524-2137 (PDT) 
>Fix:
      
>Release-Note:
>Audit-Trail:

From: "Ernest Smallis" <esmallis@stbernard.com>
To: <freebsd-gnats-submit@FreeBSD.org>
Cc:  
Subject: Re: i386/70330: Re-Open 33262? - gdb does not handle pending signals properly when single stepping during a remote debug session.
Date: Thu, 2 Sep 2004 11:31:36 -0700

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 Hi,
 
 Is there any status info. anyone can provide for this problem?  I need =
 the remote debugging to work to support
 my product development.
 
 Thanks,
 
 Ernest Smallis
 Sr. Software Engineer
 RAPID Development
 esmallis@stbernard.com
 858-524-2137
 
 
 ------_=_NextPart_001_01C4911B.142BB12E
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 charset=3Diso-8859-1">
 <META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version =
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 <TITLE>Re: i386/70330: Re-Open 33262? - gdb does not handle pending =
 signals properly when single stepping during a remote debug =
 session.</TITLE>
 </HEAD>
 <BODY>
 <!-- Converted from text/rtf format -->
 
 <P><FONT SIZE=3D2 FACE=3D"Arial">Hi,</FONT>
 </P>
 
 <P><FONT SIZE=3D2 FACE=3D"Arial">Is there any status info. anyone can =
 provide for this problem?&nbsp; I need the remote debugging to work to =
 support</FONT>
 
 <BR><FONT SIZE=3D2 FACE=3D"Arial">my product development.</FONT>
 </P>
 
 <P><FONT SIZE=3D2 FACE=3D"Arial">Thanks,</FONT>
 </P>
 
 <P><B><FONT COLOR=3D"#993366" SIZE=3D2 FACE=3D"Arial">Ernest =
 Smallis</FONT></B>
 
 <BR><B><I><FONT COLOR=3D"#008000" SIZE=3D2 FACE=3D"Arial">Sr. Software =
 Engineer</FONT></I></B>
 
 <BR><B><FONT COLOR=3D"#000000" SIZE=3D2 FACE=3D"Arial">RAPID =
 Development</FONT></B>
 
 <BR><B><FONT COLOR=3D"#0000FF" SIZE=3D2 =
 FACE=3D"Arial">esmallis@stbernard.com</FONT></B>
 
 <BR><B><FONT COLOR=3D"#0000FF" SIZE=3D2 =
 FACE=3D"Arial">858-524-2137</FONT></B>
 </P>
 
 </BODY>
 </HTML>
 ------_=_NextPart_001_01C4911B.142BB12E--
Responsible-Changed-From-To: freebsd-i386->marcel 
Responsible-Changed-By: marcel 
Responsible-Changed-When: Fri Sep 9 01:04:50 GMT 2005 
Responsible-Changed-Why:  
I deal with GDB. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=70330 
Responsible-Changed-From-To: marcel->freebsd-bugs 
Responsible-Changed-By: marcel 
Responsible-Changed-When: Mon Feb 21 18:46:06 UTC 2011 
Responsible-Changed-Why:  
Assign back to the pool. I haven't been working on it and it's unlikely 
I will in the near future.  

http://www.freebsd.org/cgi/query-pr.cgi?pr=70330 
>Unformatted: