Re: Emacs's set-frame-size can not work well with gnome-shell?

[Dmitry Gutov]

On 30.01.2020 12:38, martin rudalics wrote:
> If you put
> a breakpoint within 'set-frame-height' run the usual 'resize-test' and
> when that breakpoint is hit set a breakpoint at
>
>        f = x_top_window_to_frame (dpyinfo, 
> configureEvent.xconfigure.window);
>
> around line 8927 in xterm.c and do "n" after that breakpoint is hit,
> what do you get if you do p f now?

So. Putting a breakpoint on that line gives me:

Thread 1 "emacs" hit Breakpoint 4, handle_one_xevent 
(dpyinfo=0x555555fc5000,
    event=0x7fffffffcbb0, finish=0x555555b9df30 <current_finish>, 
hold_quit=0x7fffffffce30)
    at xterm.c:8923
8923	      f = x_top_window_to_frame (dpyinfo, 
configureEvent.xconfigure.window);
(gdb) p f
$1 = (struct frame *) 0x0
(gdb) print
$2 = (struct frame *) 0x0
(gdb) xframe
$3 = (struct frame *) 0x0
Cannot access memory at address 0x8

but that probably makes sense, since the var has not been assigned yet.

Putting a breakpoint at the next statement gives me this:

Thread 1 "emacs" hit Breakpoint 5, handle_one_xevent 
(dpyinfo=0x555555fc5000,
    event=<optimized out>, finish=0x555555b9df30 <current_finish>, 
hold_quit=0x7fffffffce30)
    at xterm.c:8929
8929          block_input ();
(gdb) p f
$4 = (struct frame *) 0x5555560a5aa0
(gdb) xframe
$5 = (struct frame *) 0x5555560a5aa0
"test child-frame"