[RFC][PATCH 0/6] Step program considering the source column information

[Hannes Domani]

Basically, this implements the new commands nextc (nc) and stepc (sc),
which allow to step through the program until an instruction is reached,
that belongs to another source column (according to the debug information).

The current column location is visualized in the frame info, and in the TUI.

Also, the column information is added to 'maint info line-table' and the
python line table interface.

Since the frame info output is different, this certainly breaks the
testsuite, so this column indicator needs a parameter to disable, but I
wasn't concerned about this yet.

With the example code from PR25913, it looks like this:

(gdb) start
Temporary breakpoint 2 at 0x40162d: file gdb-25911.c, line 4.
Starting program: C:\src\tests\gdb-25911.exe

Temporary breakpoint 2, main () at gdb-25911.c:4
4         int a = 4;
              ^
(gdb) nc
6         a = 5; a = 6; a = 7;
            ^
(gdb) nc
6         a = 5; a = 6; a = 7;
                   ^
(gdb) nc
6         a = 5; a = 6; a = 7;
                          ^
(gdb) nc
8         return 0;


What do you think of this so far?


[PATCH 1/6] Add column information of dwarf to the symbol information
[PATCH 2/6] Implement nextc and stepc commands (PR gdb/25913)
[PATCH 3/6] Add column information to maint info line-table
[PATCH 4/6] Add LineTableEntry.column to python line table interface
[PATCH 5/6] Show column of current execution point in frame info (PR
[PATCH 6/6] Show column of current execution point in TUI