Trouble with GDB/MI output

Trouble with GDB/MI output

[Uri Moszkowicz]

Hi guys,
I sent an email yesterday but it doesn't appear to have made it to the
list so if you are getting it twice I apologize. Anyway, I'm having
trouble with GDB/mi and hope that you can help. I'm using the CPAN
module Devel::GDB to control GDB through the GDB/mi interface and I
can't get the output of my program to end up in a file merged with the
GDB output. I can get them to go to separate files or to my screen.
The funny thing is the program output seems to go straight to my
terminal, making redirection useless. I get this warning:

&"warning: GDB: Failed to set controlling terminal: Operation not permitted\n"

Any idea what's going on?

Thanks,
Uri

RE: Trouble with GDB/MI output

[Marc Khouzam]

 

> -----Original Message-----
> From: gdb-owner@sourceware.org 
> [mailto:gdb-owner@sourceware.org] On Behalf Of Uri Moszkowicz
> Sent: Friday, February 13, 2009 4:01 PM
> To: gdb@sourceware.org
> Subject: Trouble with GDB/MI output
> 
> Hi guys,
> I sent an email yesterday but it doesn't appear to have made it to the
> list so if you are getting it twice I apologize. Anyway, I'm having
> trouble with GDB/mi and hope that you can help. I'm using the CPAN
> module Devel::GDB to control GDB through the GDB/mi interface and I
> can't get the output of my program to end up in a file merged with the
> GDB output. I can get them to go to separate files or to my screen.
> The funny thing is the program output seems to go straight to my
> terminal, making redirection useless. I get this warning:
> 
> &"warning: GDB: Failed to set controlling terminal: Operation 
> not permitted\n"
> 
> Any idea what's going on?


Have you tried the MI command
-inferior-tty-set /dev/pts/<somenumber>
this is how I get to choose where my program prints.

Marc

Re: Trouble with GDB/MI output

[Uri Moszkowicz]

Hi Marc,
Yes I have but it doesn't make a difference - the output still goes to
my terminal and not to the file where GDB output is going.

Thanks,
Uri

On Fri, Feb 13, 2009 at 4:05 PM, Marc Khouzam <marc.khouzam@ericsson.com> wrote:
>
>
>> -----Original Message-----
>> From: gdb-owner@sourceware.org
>> [mailto:gdb-owner@sourceware.org] On Behalf Of Uri Moszkowicz
>> Sent: Friday, February 13, 2009 4:01 PM
>> To: gdb@sourceware.org
>> Subject: Trouble with GDB/MI output
>>
>> Hi guys,
>> I sent an email yesterday but it doesn't appear to have made it to the
>> list so if you are getting it twice I apologize. Anyway, I'm having
>> trouble with GDB/mi and hope that you can help. I'm using the CPAN
>> module Devel::GDB to control GDB through the GDB/mi interface and I
>> can't get the output of my program to end up in a file merged with the
>> GDB output. I can get them to go to separate files or to my screen.
>> The funny thing is the program output seems to go straight to my
>> terminal, making redirection useless. I get this warning:
>>
>> &"warning: GDB: Failed to set controlling terminal: Operation
>> not permitted\n"
>>
>> Any idea what's going on?
>
>
> Have you tried the MI command
> -inferior-tty-set /dev/pts/<somenumber>
> this is how I get to choose where my program prints.
>
> Marc
>

Re: Trouble with GDB/MI output

[Vladimir Prus]

Uri Moszkowicz wrote:

> Hi guys,
> I sent an email yesterday but it doesn't appear to have made it to the
> list so if you are getting it twice I apologize. Anyway, I'm having
> trouble with GDB/mi and hope that you can help. I'm using the CPAN
> module Devel::GDB to control GDB through the GDB/mi interface and I
> can't get the output of my program to end up in a file merged with the
> GDB output. I can get them to go to separate files or to my screen.
> The funny thing is the program output seems to go straight to my
> terminal, making redirection useless. I get this warning:
> 
> &"warning: GDB: Failed to set controlling terminal: Operation not permitted\n"
> 
> Any idea what's going on?

No. And honestly, you did not give any details to make it possible to
guess anything.

- Volodya

Re: Trouble with GDB/MI output

[Nick Roberts]

 > The funny thing is the program output seems to go straight to my
 > terminal, making redirection useless. I get this warning:
 > 
 > &"warning: GDB: Failed to set controlling terminal: Operation not permitted\n"

Thiago Bauermann fixed a bug in GDB, just after the release of 6.8, to allow
GDB to set the controlling terminal of the inferior.  You don't say what
version of GDB you are using but, assuming it's 6.8 or earlier, you could try
GDB in the CVS repository (or a snapshot) to see if that works with your CPAN
module.

-- 
Nick                                           http://www.inet.net.nz/~nickrob

Re: Trouble with GDB/MI output

[Uri Moszkowicz]

Hi Nick,
Yes I'm sorry that I forgot to mention that. I was using
6.8.50.20090119. I quickly browsed through commit messages since then
and didn't see anything relevant. I just tried the newest version
(6.8.50.20090217) anyway and the problem still exists. Setting
inferior-tty to /dev/stdout results in the output going nowhere.
Setting it to /dev/pts/21 (from "tty") bypasses the file redirect. Not
sure how "inferior-tty" would help me.

Thanks,
Uri

On Sat, Feb 14, 2009 at 3:32 PM, Nick Roberts <nickrob@snap.net.nz> wrote:
>  > The funny thing is the program output seems to go straight to my
>  > terminal, making redirection useless. I get this warning:
>  >
>  > &"warning: GDB: Failed to set controlling terminal: Operation not permitted\n"
>
> Thiago Bauermann fixed a bug in GDB, just after the release of 6.8, to allow
> GDB to set the controlling terminal of the inferior.  You don't say what
> version of GDB you are using but, assuming it's 6.8 or earlier, you could try
> GDB in the CVS repository (or a snapshot) to see if that works with your CPAN
> module.
>
> --
> Nick                                           http://www.inet.net.nz/~nickrob
>