[Bug breakpoints/15182] New: Pagination is triggered for dprintf

[Bug breakpoints/15182] New: Pagination is triggered for dprintf

[marc.khouzam at ericsson dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15182

             Bug #: 15182
           Summary: Pagination is triggered for dprintf
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: breakpoints
        AssignedTo: unassigned@sourceware.org
        ReportedBy: marc.khouzam@ericsson.com
    Classification: Unclassified


Pagination is triggered for dprintf in CLI mode.  I have seen this when using
dprintf-style 'gdb' but I didn't try the "call" mode because it does not work
on my Ubuntu machine.  

I think pagination is a problem for dprintf because:

   a) when pagination is triggered, inferior execution will be 
      interrupted until the user answers the pagination prompt

   b) pagination is triggered by the dprintf but not by real 
      inferior output. So, as dprintf and inferior printouts 
      appear interleaved on the screen, the pagination prompt 
      will be triggered when the dprintfs add up to too many, 
      which will seem random to the user, since the other 
      printouts are also visible.

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[Bug breakpoints/15182] Pagination is triggered for dprintf

[teawater at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15182

teawater <teawater at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |teawater at gmail dot com

--- Comment #1 from teawater <teawater at gmail dot com> 2013-04-18 08:58:57 UTC ---
http://sourceware.org/ml/gdb-patches/2013-04/msg00550.html

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[Bug breakpoints/15182] Pagination is triggered for dprintf

[teawater at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15182

teawater <teawater at gmail dot com> changed:

           What    |Removed                     |Added
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[Bug breakpoints/15182] Pagination is triggered for dprintf

[teawater at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15182

teawater <teawater at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |WAITING

--- Comment #2 from teawater <teawater at gmail dot com> 2013-04-26 07:57:02 UTC ---
http://www.sourceware.org/ml/gdb-patches/2013-04/msg00790.html

Instead of fixing this problem, could we document that user has to disable
pagination when dprintf breakpoint is used? Something similar is documented for
non-stop here <http://sourceware.org/gdb/onlinedocs/gdb/Non_002dStop-Mode.html>

     # If using the CLI, pagination breaks non-stop.
     set pagination off
--
Yao (éå)

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http://sourceware.org/bugzilla/show_bug.cgi?id\x14204

Tom Tromey <tromey at redhat dot com> changed:

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[Bug breakpoints/15182] Pagination is triggered for dprintf

[marc.khouzam at ericsson dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15182

--- Comment #3 from Marc Khouzam <marc.khouzam at ericsson dot com> 2013-05-03 10:38:21 UTC ---
(In reply to comment #2)
> http://www.sourceware.org/ml/gdb-patches/2013-04/msg00790.html
> 
> Instead of fixing this problem, could we document that user has to disable
> pagination when dprintf breakpoint is used? Something similar is documented for
> non-stop here <http://sourceware.org/gdb/onlinedocs/gdb/Non_002dStop-Mode.html>
> 
>      # If using the CLI, pagination breaks non-stop.
>      set pagination off
> --
> Yao (éå)

Yes, that sounds like a good enough solution.

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Subject: [Bug breakpoints/15182] Pagination is triggered for dprintf
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http://sourceware.org/bugzilla/show_bug.cgi?id\x15182

--- Comment #4 from Marc Khouzam <marc.khouzam at ericsson dot com> 2013-05-03 10:44:11 UTC ---
(In reply to comment #0)

>    b) pagination is triggered by the dprintf but not by real
>       inferior output. So, as dprintf and inferior printouts
>       appear interleaved on the screen, the pagination prompt
>       will be triggered when the dprintfs add up to too many,
>       which will seem random to the user, since the other
>       printouts are also visible.

Just for the sake of completeness, since normal inferior output does not
trigger pagination, and that dprintf output should behave like real output, I
wonder why we can't have the dprintf use the same technique as normal output?

But anyway, that is not a big deal, I just wanted to complete the discussion.

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[Bug breakpoints/15182] Pagination is triggered for dprintf

[marc.khouzam at ericsson dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15182

--- Comment #5 from Marc Khouzam <marc.khouzam at ericsson dot com> 2013-05-03 10:45:06 UTC ---
Another note is that pagination does not seem to trigger when using MI, which
is my main usecase.

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[Bug breakpoints/15182] Pagination is triggered for dprintf

[marc.khouzam at ericsson dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=15182

Marc Khouzam <marc.khouzam at ericsson dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #6 from Marc Khouzam <marc.khouzam at ericsson dot com> ---
We agreed that this would not be fixed.

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