How to obtain a "non-stripped" executable for producing a usable core-dump

[Edgar Pettijohn]

On 16-09-13 22:05:55, Ben Johnson wrote:
> On 9/13/2016 10:00 PM, Edgar Pettijohn wrote:
> >> I'm attempting to capture a core-dump file, and gdb reports
> >> > 
> >> > warning: core file may not match specified executable file.
> >> > 
> > I believe this means the core file doesn't match up to the executable. I would delete the core and try to reproduce with your new executable then run gdb with a core that matches.
> > 
> 
> Thanks so much for the quick reply, Edgar!
> 
> That's what I find to be so strange. I am producing the core-dump and
> then attempting to run it through gdb immediately thereafter. I just
> don't see how the dovecot-lda executable could be changing in the space
> of about ten seconds.
> 
> I don't know what it's worth, but the "bt full" command, while at the
> gdb prompt, produces legible output. I don't see a bunch of "?"
> characters, as cautioned about in the bug report instructions.
> 
> For example, here's the tail end of the output (is it usable as-is?):

I've never had lda dump core on me.  If this is just the tail end I'd say
post the whole thing and see if anyone can help.

> 
>  session_id = 0x14844a489d8 <error: Cannot access memory at address
> 0x14844a489d8>,
>           session_id_prefix = 0x0, local_ip = {family = 0, u = {ip6 =
> {__in6_u = {
>                   __u6_addr8 = '\000' <repeats 15 times>, __u6_addr16 =
> {0, 0, 0, 0, 0, 0, 0, 0},
>                   __u6_addr32 = {0, 0, 0, 0}}}, ip4 = {s_addr = 0}}},
> remote_ip = {family = 0, u = {
>               ip6 = {__in6_u = {__u6_addr8 = '\000' <repeats 15 times>,
> __u6_addr16 = {0, 0, 0, 0,
>                     0, 0, 0, 0}, __u6_addr32 = {0, 0, 0, 0}}}, ip4 =
> {s_addr = 0}}},
>           local_port = 65320, remote_port = 59489, userdb_fields = 0x0,
>           flags_override_add = MAIL_STORAGE_SERVICE_FLAG_DISALLOW_ROOT,
>           flags_override_remove = (unknown: 0), no_userdb_lookup = 0}
>         storage = 0x1
>         user_source = 0x56242ac6d3af ""
>         destaddr_source = 0x56242ac6d3af ""
>         process_euid = 5000
>         stderr_rejection = false
>         ret = <optimized out>
>         c = <optimized out>
>         error = MAIL_ERROR_NONE
> 
> Thanks in advance for any additional insight that you may be able to
> provide!
> 
> -Ben

-- 
Edgar Pettijohn