[Bug tui/17774] New: gdb on Windows TUI mode: arrow keys do not work

[Bug tui/17774] New: gdb on Windows TUI mode: arrow keys do not work

[ofircohenn at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17774

            Bug ID: 17774
           Summary: gdb on Windows TUI mode: arrow keys do not work
           Product: gdb
           Version: 7.8
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tui
          Assignee: unassigned at sourceware dot org
          Reporter: ofircohenn at gmail dot com

Hi,
I'm building gdb on Windows with TUI support (--enable-tui) using msys2 with
MinGWx64, and the arrow keys do not respond when in TUI mode.

========
Scenario
========
1) Start gdb --tui (from DOS, with MinGWx64 bin dir in the PATH)
2) Move focus to gdb's CLI window (Ctrl+x, o)
2) Type any command (do not press Enter yet)
3) Click on the left/right keyboard arrow keys

Expected: text cursor will move to the left/right
Actual: nothing happens.

Moreover, the up/down keys (history lookup), do not respond either.

On Linux, OTOH, it works and the arrow keys respond (Ubuntu 12.04 with sudo
apt-get install gdb).


====================
Debugging the issue
====================
A shallow investigation, debugging of gdb with gdb, showed that
wgetch() function (deep in the call-stack, invoked indirectly by
stdin_event_handler), is blocking and doesn't return when the
arrow-keys are issued.

When gdb is not in TUI mode, however, getch() is called instead,
returns promptly and issues
the associated dispatch handler.
I have a mailing list thread at "gdb at sourceware dot org":
http://comments.gmane.org/gmane.comp.gdb.devel/35208

This is as far as I could get.


=======================
More interesting facts
=======================
1) When you exit TUI mode (Ctrl+x, a), the arrow keys
   function just fine and everything works.
2) Ctrl+p works (but up arrow key doesn't)
3) Ctrl+b/Ctrl+f work (but left/right arrow keys do not)
4) Ctrl+d works (but delete doesn't).



==========
Resources
==========
1) msys2 + MinGWx64
2) PDCurses (instead of ncurses)
3) .././configure --enable-tui --with-expat --build=x86_64-w64-mingw32; make
4) set PATH=C:\msys64\mingw64\bin; gdb --tui

Thanks,
Ofir

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[Bug tui/17774] gdb on Windows TUI mode: arrow keys do not work

[ofircohenn at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17774

Ofir <ofircohenn at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-w64-mingw32
                 CC|                            |ofircohenn at gmail dot com
               Host|                            |x86_64-w64-mingw32
              Build|                            |x86_64-w64-mingw32

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[Bug tui/17774] gdb on Windows TUI mode: arrow keys do not work

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=17774

Tom Tromey <tromey at sourceware dot org> changed:

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

--- Comment #2 from Tom Tromey <tromey at sourceware dot org> ---
No response in a while.

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