Re: bin/49979: gdb does not work properly on NetBSD-6.1.1/i386

[Darren Reed <darrenr%netbsd.org@localhost>]

The following reply was made to PR bin/49979; it has been noted by GNATS.

From: Darren Reed <darrenr%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost, netbsd-bugs%netbsd.org@localhost
Cc: 
Subject: Re: bin/49979: gdb does not work properly on NetBSD-6.1.1/i386
Date: Tue, 30 Jun 2015 22:02:09 +1000

 On 17/06/2015 4:40 PM, David Holland wrote:
 > The following reply was made to PR bin/49979; it has been noted by GNATS.
 > 
 > From: David Holland <dholland-bugs%netbsd.org@localhost>
 > To: gnats-bugs%NetBSD.org@localhost
 > Cc: 
 > Subject: Re: bin/49979: gdb does not work properly on NetBSD-6.1.1/i386
 > Date: Wed, 17 Jun 2015 06:38:01 +0000
 > 
 >  On Tue, Jun 16, 2015 at 12:00:01PM +0000, darrenr%netbsd.org@localhost wrote:
 >   > >Synopsis:       gdb does not work properly on NetBSD-6.1.1/i386
 >                                                                 ^^^^
 >   > Architecture: x86_64
 >   > Machine: amd64
 >              ^^^^^^^^^^^
 >  
 >  to confirm, you do mean 32-bit i386 and the amd64 is just because you
 >  filed the PR from another machine?
 
 Correct.
 
 >   > Whilst using gdb to step through a problem and debug an application,
 >   > it randomly stops working. e.g.:
 >   > (gdb) run -O -d -r test.cap ip
 >   > Starting program: /home/darrenr/tcpdump-4.7.4/tcpdump -O -d -r test.cap ip
 >   > reading from file test.cap, link-type EN10MB (Ethernet)
 >   > 
 >   > Breakpoint 1, flatten_bpfprog (start=0xbfbfebe4) at ./optimize.c:2276
 >   > 2276            flen = start->bf_len;
 >   > (gdb) n
 >   > 2277            for (slen = 0, fp = start->bf_insns; flen > 0; flen--, fp++)
 >   > (gdb)
 >   > 2278                    slen += BPFX_WORDS(fp->code);
 >   > (gdb)
 >   > 0x081d17f3 in ?? ()
 >   > netbsd: {790} file tcpdump
 >   > tcpdump: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, for NetBSD 6.1.1, not stripped
 >   > >How-To-Repeat:
 >   > Use gdb to debug program.
 >  
 >  I take it it's not repeatable in the ordinary sense? How often does it
 >  happen? Are the symptoms more or less the same each time? Is it
 >  correlated with anything that you've observed?
 
 100% repeatable.