Re: [PATCH v2] Show the selected frame in "bt"

[Philippe Waroquiers <philippe.waroquiers@skynet.be>]

On Sun, 2026-07-05 at 06:26 -0600, Tom Tromey wrote:
> I've occasionally wished that "bt" would indicate the selected frame.
> This patch implements this idea.  In particular it marks the selected
> frame with "*", similar to other "selected" output in gdb.  (See that
> other series where emoji were allowed in the "current" column of a
> table; if that is ever resurrected, I'd expect the same treatment to
> be applied here.)
> 
> Now the output looks like:
> 
> (gdb) bt
>   #0  0x00007ffff6e381fd in poll () from /lib64/libc.so.6
>   #1  0x000000000100b1ee in gdb_wait_for_event (block=1) at ../../binutils-gdb/gdbsupport/event-loop.cc:587
>   #2  0x000000000100a77f in gdb_do_one_event (mstimeout=-1) at ../../binutils-gdb/gdbsupport/event-loop.cc:263
> * #3  0x00000000007d2c6a in interp::do_one_event (this=<optimized out>, mstimeout=-1) at ../../binutils-gdb/gdb/interps.h:90
>   #4  start_event_loop () at ../../binutils-gdb/gdb/main.c:400
>   #5  captured_command_loop () at ../../binutils-gdb/gdb/main.c:465
>   #6  0x00000000007d5715 in captured_main (context=context@entry=0x7fffffffdd10) at ../../binutils-gdb/gdb/main.c:1373
>   #7  gdb_main (args=args@entry=0x7fffffffdd50) at ../../binutils-gdb/gdb/main.c:1392
>   #8  0x0000000000452cd5 in main (argc=1, argv=0x7fffffffdea8) at ../../binutils-gdb/gdb/gdb.c:38
> 
> I think the main downside of this patch is that it uses a little more
> horizontal space for the indicator.
Maybe you could instead replace the # by a * for the selected frame so as to have:

(gdb) bt
#0  0x00007ffff6e381fd in poll () from /lib64/libc.so.6
#1  0x000000000100b1ee in gdb_wait_for_event (block=1) at ../../binutils-gdb/gdbsupport/event-loop.cc:587
#2  0x000000000100a77f in gdb_do_one_event (mstimeout=-1) at ../../binutils-gdb/gdbsupport/event-loop.cc:263
*3  0x00000000007d2c6a in interp::do_one_event (this=<optimized out>, mstimeout=-1) at ../../binutils-gdb/gdb/interps.h:90
#4  start_event_loop () at ../../binutils-gdb/gdb/main.c:400
#5  captured_command_loop () at ../../binutils-gdb/gdb/main.c:465
#6  0x00000000007d5715 in captured_main (context=context@entry=0x7fffffffdd10) at ../../binutils-gdb/gdb/main.c:1373
#7  gdb_main (args=args@entry=0x7fffffffdd50) at ../../binutils-gdb/gdb/main.c:1392
#8  0x0000000000452cd5 in main (argc=1, argv=0x7fffffffdea8) at ../../binutils-gdb/gdb/gdb.c:38

Philippe