Package: emacs;
Reported by: Live System User <nyc4bos <at> aol.com>
Date: Sun, 3 Dec 2017 15:43:01 UTC
Severity: normal
Tags: moreinfo, wontfix
Found in versions 24.5, 25.0.92, 25.2
Done: Glenn Morris <rgm <at> gnu.org>
Bug is archived. No further changes may be made.
View this message in rfc822 format
From: Live System User <nyc4bos <at> aol.com> To: Noam Postavsky <npostavs <at> users.sourceforge.net> Cc: martin rudalics <rudalics <at> gmx.at>, 29548 <at> debbugs.gnu.org Subject: bug#29548: 25.2; How to DEBUG get-device-terminal Date: Wed, 14 Feb 2018 12:26:19 -0500
Noam Postavsky <npostavs <at> users.sourceforge.net> writes:
> Live System User <nyc4bos <at> aol.com> writes:
>
>> Noam Postavsky <npostavs <at> users.sourceforge.net> writes:
>>
>>> Hmm, if you can reproduce this semi-regularly, then perhaps the
>>> following patch can catch the reason for the problem. It sets a
>>> breakpoint in Fsignal while the terminal is in the process of being
>
> I said Fsignal, but posted a patching breaking in signal_or_quit. The
> latter only exists in emacs-26. Are you running that or 25.2 as in your
> original report?
>
> Actually I think it might work better to break in longjmp instead.
Where would I do that?
>
>> Thread 1 "emacs" hit Breakpoint 3, begin_delete_terminal () at terminal.c:317
>> 317 delete_terminal_count++;
>>
>>
>> I noticed that this didn't end with a paired
>>
>> "delete_terminal_count--;".
>>
>> which it does do so normally.
>
> I believe this means that the problem is indeed a non-local exit
> happening somewhere in there, but we failed to catch it. Either because
> I posted the Emacs 26 version while you are on Emacs 25, or it doesn't
> go through the signal machinery at all.
When I first start up Emacs daemon. attach GDB, define commands,
and then continue:
(gdb) define print_terminal_list
Type commands for definition of "print_terminal_list".
End with a line saying just "end"
>set $t = terminal_list
>while $t
>print *$t
>set $t = $t->next_terminal
>end
>end
(gdb) c
Continuing.
I see the following immediately upon creating a GUI
frame via "emacsclient -c":
There is no member named name.
What does this message mean?
(Presumably. this is from .gdbinit)
When I subsequently create a TTY framel I do not
get this message.
Here is the "terminal list":
(gdb) print_terminal_list
$1 = {
header = {
size = 4611686018561777668,
gcaligned = 4 '\004'
},
param_alist = XIL(0),
charset_list = XIL(0),
Vselection_alist = XIL(0),
glyph_code_table = XIL(0),
next_terminal = 0x3c63270,
id = 6,
reference_count = 0,
type = output_termcap,
name = 0x2b4fc10 "/dev/pts/8",
kboard = 0x3dcba00,
image_cache = 0x0,
display_info = {
tty = 0x2ea9e00,
x = 0x2ea9e00,
w32 = 0x2ea9e00,
ns = 0x2ea9e00
},
terminal_coding = 0x2751100,
---Type <return> to continue, or q <return> to quit---
keyboard_coding = 0x24c0f00,
rif = 0x0,
cursor_to_hook = 0x4f8d81 <tty_cursor_to>,
raw_cursor_to_hook = 0x4f8e5d <tty_raw_cursor_to>,
clear_to_end_hook = 0x4f8f1f <tty_clear_to_end>,
clear_frame_hook = 0x4f9022 <tty_clear_frame>,
clear_end_of_line_hook = 0x4f9116 <tty_clear_end_of_line>,
ins_del_lines_hook = 0x4facda <tty_ins_del_lines>,
insert_glyphs_hook = 0x4fa63c <tty_insert_glyphs>,
write_glyphs_hook = 0x4f9f77 <tty_write_glyphs>,
delete_glyphs_hook = 0x4faae4 <tty_delete_glyphs>,
ring_bell_hook = 0x4f8059 <tty_ring_bell>,
toggle_invisible_pointer_hook = 0x0,
reset_terminal_modes_hook = 0x4f843a <tty_reset_terminal_modes>,
set_terminal_modes_hook = 0x4f8254 <tty_set_terminal_modes>,
update_begin_hook = 0x0,
update_end_hook = 0x4f860f <tty_update_end>,
set_terminal_window_hook = 0x4f86b6 <tty_set_terminal_window>,
mouse_position_hook = 0x4fe4e2 <term_mouse_position>,
frame_rehighlight_hook = 0x0,
frame_raise_lower_hook = 0x0,
fullscreen_hook = 0x0,
menu_show_hook = 0x500c1d <tty_menu_show>,
---Type <return> to continue, or q <return> to quit---
popup_dialog_hook = 0x0,
set_vertical_scroll_bar_hook = 0x0,
set_horizontal_scroll_bar_hook = 0x0,
condemn_scroll_bars_hook = 0x0,
redeem_scroll_bar_hook = 0x0,
judge_scroll_bars_hook = 0x0,
read_socket_hook = 0x566c0e <tty_read_avail_input>,
frame_up_to_date_hook = 0x0,
buffer_flipping_unblocked_hook = 0x0,
delete_frame_hook = 0x5017eb <tty_free_frame_resources>,
delete_terminal_hook = 0x503230 <delete_tty>
}
$2 = {
header = {
size = 4611686018561777668,
gcaligned = 4 '\004'
},
param_alist = XIL(0x398c6d3),
charset_list = XIL(0),
Vselection_alist = XIL(0),
glyph_code_table = XIL(0),
next_terminal = 0xd38140,
id = 5,
---Type <return> to continue, or q <return> to quit---
reference_count = 1,
type = output_x_window,
name = 0x3452030 ":0",
kboard = 0x33f1130,
image_cache = 0x2948760,
display_info = {
tty = 0x3665600,
x = 0x3665600,
w32 = 0x3665600,
ns = 0x3665600
},
terminal_coding = 0x399ea00,
keyboard_coding = 0x3711000,
rif = 0x92d640 <x_redisplay_interface>,
cursor_to_hook = 0x0,
raw_cursor_to_hook = 0x0,
clear_to_end_hook = 0x0,
clear_frame_hook = 0x518b22 <x_clear_frame>,
clear_end_of_line_hook = 0x0,
ins_del_lines_hook = 0x51938c <x_ins_del_lines>,
insert_glyphs_hook = 0x0,
write_glyphs_hook = 0x0,
delete_glyphs_hook = 0x5189c2 <x_delete_glyphs>,
---Type <return> to continue, or q <return> to quit---
ring_bell_hook = 0x519312 <XTring_bell>,
toggle_invisible_pointer_hook = 0x5192cc <XTtoggle_invisible_pointer>,
reset_terminal_modes_hook = 0x0,
set_terminal_modes_hook = 0x0,
update_begin_hook = 0x51163b <x_update_begin>,
update_end_hook = 0x511eef <x_update_end>,
set_terminal_window_hook = 0x0,
mouse_position_hook = 0x51ab85 <XTmouse_position>,
frame_rehighlight_hook = 0x519fe3 <XTframe_rehighlight>,
frame_raise_lower_hook = 0x525056 <XTframe_raise_lower>,
fullscreen_hook = 0x523cfb <XTfullscreen_hook>,
menu_show_hook = 0x498353 <x_menu_show>,
popup_dialog_hook = 0x4994da <xw_popup_dialog>,
set_vertical_scroll_bar_hook = 0x51bd30 <XTset_vertical_scroll_bar>,
set_horizontal_scroll_bar_hook = 0x51c2c7 <XTset_horizontal_scroll_bar>,
condemn_scroll_bars_hook = 0x51ca88 <XTcondemn_scroll_bars>,
redeem_scroll_bar_hook = 0x51cb79 <XTredeem_scroll_bar>,
judge_scroll_bars_hook = 0x51d085 <XTjudge_scroll_bars>,
read_socket_hook = 0x5208f0 <XTread_socket>,
frame_up_to_date_hook = 0x511f45 <XTframe_up_to_date>,
buffer_flipping_unblocked_hook = 0x512006 <XTbuffer_flipping_unblocked_hook>,
delete_frame_hook = 0x526493 <x_destroy_window>,
---Type <return> to continue, or q <return> to quit---
delete_terminal_hook = 0x527ec2 <x_delete_terminal>
}
$3 = {
header = {
size = 4611686018561777668,
gcaligned = 4 '\004'
},
param_alist = XIL(0x1217ec3),
charset_list = XIL(0x1134013),
Vselection_alist = XIL(0),
glyph_code_table = XIL(0),
next_terminal = 0x0,
id = 0,
reference_count = 1,
type = output_initial,
name = 0xce6940 "initial_terminal",
kboard = 0xd33a00,
image_cache = 0x0,
display_info = {
tty = 0x0,
x = 0x0,
w32 = 0x0,
ns = 0x0
---Type <return> to continue, or q <return> to quit---
},
terminal_coding = 0xd3abe0,
keyboard_coding = 0xd3a970,
rif = 0x0,
cursor_to_hook = 0x0,
raw_cursor_to_hook = 0x0,
clear_to_end_hook = 0x0,
clear_frame_hook = 0x0,
clear_end_of_line_hook = 0x0,
ins_del_lines_hook = 0x0,
insert_glyphs_hook = 0x0,
write_glyphs_hook = 0x0,
delete_glyphs_hook = 0x0,
ring_bell_hook = 0x0,
toggle_invisible_pointer_hook = 0x0,
reset_terminal_modes_hook = 0x0,
set_terminal_modes_hook = 0x0,
update_begin_hook = 0x0,
update_end_hook = 0x0,
set_terminal_window_hook = 0x0,
mouse_position_hook = 0x0,
frame_rehighlight_hook = 0x0,
frame_raise_lower_hook = 0x0,
---Type <return> to continue, or q <return> to quit---
fullscreen_hook = 0x0,
menu_show_hook = 0x0,
popup_dialog_hook = 0x0,
set_vertical_scroll_bar_hook = 0x0,
set_horizontal_scroll_bar_hook = 0x0,
condemn_scroll_bars_hook = 0x0,
redeem_scroll_bar_hook = 0x0,
judge_scroll_bars_hook = 0x0,
read_socket_hook = 0x0,
frame_up_to_date_hook = 0x0,
buffer_flipping_unblocked_hook = 0x0,
delete_frame_hook = 0x5044cf <initial_free_frame_resources>,
delete_terminal_hook = 0x50458a <delete_initial_terminal>
}
(gdb) c
Continuing.
Thread 1 "emacs" hit Breakpoint 5, begin_delete_terminal () at terminal.c:317
317 delete_terminal_count++;
Thread 1 "emacs" hit Breakpoint 6, end_delete_terminal () at terminal.c:321
321 delete_terminal_count--;
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