Package: emacs;
Reported by: Joseph Mingrone <jrm <at> ftfl.ca>
Date: Sun, 20 Dec 2015 06:28:01 UTC
Severity: normal
Tags: moreinfo
Found in version 25.0.50
Done: Po Lu <luangruo <at> yahoo.com>
Bug is archived. No further changes may be made.
Message #32 received at 22214 <at> debbugs.gnu.org (full text, mbox):
From: Joseph Mingrone <jrm <at> ftfl.ca> To: Eli Zaretskii <eliz <at> gnu.org> Cc: 22214 <at> debbugs.gnu.org, bburns.km <at> gmail.com Subject: Re: bug#22214: 25.0.50; lock up with gui dialogs and clipmon-mode Date: Mon, 21 Dec 2015 15:42:57 -0400
[Message part 1 (text/plain, inline)]
Eli Zaretskii <eliz <at> gnu.org> writes:
>> From: Joseph Mingrone <jrm <at> ftfl.ca>
>> Cc: 22214 <at> debbugs.gnu.org, bburns.km <at> gmail.com
>> Date: Mon, 21 Dec 2015 12:41:47 -0400
>> Thread 3 (Thread 1902400 (LWP 100743)):
>> #0 0x0000000807444cfa in _sigprocmask () from /lib/libc.so.7
>> #1 0x0000000804656526 in pthread_sigmask () from /lib/libthr.so.3
>> #2 0x00000000007ab8e9 in block_atimers (oldset=0x7fffffff7970) at atimer.c:70
>> #3 0x00000000007abffc in do_pending_atimers () at atimer.c:434
>> #4 0x00000000005f803e in process_pending_signals () at keyboard.c:7043
>> #5 0x00000000006c1559 in Fmake_list (length=0, init=0) at alloc.c:2718
>> #6 0x0000000000713c2a in concat (nargs=1, args=0x7fffffff7b28, target_type=Lisp_Cons, last_special=false) at fns.c:633
>> #7 0x00000000007135d2 in Fcopy_sequence (arg=18186131) at fns.c:501
>> #8 0x00000000005f25b3 in timer_check () at keyboard.c:4452
> Thanks.
> Can you find out which thread uses up the CPU? If that's this thread
> (the Emacs application main thread), can you use the technique
> described in etc/DEBUG under "If the symptom of the bug is that Emacs
> fails to respond" to find out whether Emacs is looping and where?
It looks like it's looping in process.c starting at line 4565
while (1)
{
bool process_skipped = false;
...
The gdb output below shows the steps through the looping.
Joseph
jrm <at> phe ~/scm/nm/emacs.git/src % /usr/local/bin/gdb ./emacs
GNU gdb (GDB) 7.10 [GDB v7.10 for FreeBSD]
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-portbld-freebsd10.1".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./emacs...done.
SIGINT is used by the debugger.
Are you sure you want to change it? (y or n) [answered Y; input not from terminal]
DISPLAY = :0.0
TERM = screen-256color
Breakpoint 1 at 0x5dfb54: file emacs.c, line 371.
Temporary breakpoint 2 at 0x61e9d9: file sysdep.c, line 905.
(gdb) run -Q
Starting program: /usr/home/jrm/scm/nm/emacs.git/src/emacs -Q
[New Thread 1902400 (LWP 101016)]
^Z[New Thread 16b5c00 (LWP 100130)]
Program received signal SIGTSTP, Stopped (user).
[Switching to Thread 1902400 (LWP 101016)]
0x000000080736efaa in ktimer_settime () from /lib/libc.so.7
(gdb) finish
Run till exit from #0 0x000000080736efaa in ktimer_settime () from /lib/libc.so.7
0x00000000007abd8b in set_alarm () at atimer.c:312
312 && timer_settime (alarm_timer, TIMER_ABSTIME, &ispec, 0) == 0)
(gdb) finish
Run till exit from #0 0x00000000007abd8b in set_alarm () at atimer.c:312
run_timers () at atimer.c:382
382 }
(gdb) finish
Run till exit from #0 run_timers () at atimer.c:382
do_pending_atimers () at atimer.c:436
436 unblock_atimers (&oldset);
(gdb) finish
Run till exit from #0 do_pending_atimers () at atimer.c:436
process_pending_signals () at keyboard.c:7044
7044 }
(gdb) finish
Run till exit from #0 process_pending_signals () at keyboard.c:7044
Fmake_list (length=0, init=0) at alloc.c:2689
2689 while (size > 0)
(gdb) finish
Run till exit from #0 Fmake_list (length=0, init=0) at alloc.c:2689
0x0000000000713c2a in concat (nargs=1, args=0x7fffffff7ad8, target_type=Lisp_Cons, last_special=false) at fns.c:633
633 val = Fmake_list (make_number (result_len), Qnil);
Value returned is $1 = 105189203
(gdb) finish
Run till exit from #0 0x0000000000713c2a in concat (nargs=1, args=0x7fffffff7ad8, target_type=Lisp_Cons, last_special=false)
at fns.c:633
Fcopy_sequence (arg=21640739) at fns.c:502
502 }
Value returned is $2 = 105189203
(gdb) finish
Run till exit from #0 Fcopy_sequence (arg=21640739) at fns.c:502
0x00000000005f25b3 in timer_check () at keyboard.c:4452
4452 timers = Fcopy_sequence (Vtimer_list);
Value returned is $3 = 105189203
(gdb) finish
Run till exit from #0 0x00000000005f25b3 in timer_check () at keyboard.c:4452
readable_events (flags=1) at keyboard.c:3313
3313 if (kbd_fetch_ptr != kbd_store_ptr)
Value returned is $4 = {tv_sec = 0, tv_nsec = -1}
(gdb) finish
Run till exit from #0 readable_events (flags=1) at keyboard.c:3313
0x00000000005f7963 in get_input_pending (flags=1) at keyboard.c:6691
6691 input_pending = (!NILP (Vquit_flag) || readable_events (flags));
Value returned is $5 = true
(gdb) finish
Run till exit from #0 0x00000000005f7963 in get_input_pending (flags=1) at keyboard.c:6691
swallow_events (do_display=false) at keyboard.c:4205
4205 if (!input_pending && timers_run != old_timers_run && do_display)
Value returned is $6 = true
(gdb) finish
Run till exit from #0 swallow_events (do_display=false) at keyboard.c:4205
wait_reading_process_output (time_limit=5, nsecs=0, read_kbd=0, do_display=false, wait_for_cell=17528851, wait_proc=0x0,
just_wait_proc=0) at process.c:5004
5004 if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell)))
(gdb) finish
Run till exit from #0 wait_reading_process_output (time_limit=5, nsecs=0, read_kbd=0, do_display=false, wait_for_cell=17528851,
wait_proc=0x0, just_wait_proc=0) at process.c:5004
^Z
Program received signal SIGTSTP, Stopped (user).
0x000000080736efaa in ktimer_settime () from /lib/libc.so.7
(gdb) finish
Run till exit from #0 0x000000080736efaa in ktimer_settime () from /lib/libc.so.7
0x00000000007abd8b in set_alarm () at atimer.c:312
312 && timer_settime (alarm_timer, TIMER_ABSTIME, &ispec, 0) == 0)
(gdb) finish
Run till exit from #0 0x00000000007abd8b in set_alarm () at atimer.c:312
run_timers () at atimer.c:382
382 }
(gdb) finish
Run till exit from #0 run_timers () at atimer.c:382
do_pending_atimers () at atimer.c:436
436 unblock_atimers (&oldset);
(gdb) finish
Run till exit from #0 do_pending_atimers () at atimer.c:436
process_pending_signals () at keyboard.c:7044
7044 }
(gdb) finish
Run till exit from #0 process_pending_signals () at keyboard.c:7044
0x0000000000788a69 in wait_reading_process_output (time_limit=5, nsecs=0, read_kbd=0, do_display=false, wait_for_cell=17528851,
wait_proc=0x0, just_wait_proc=0) at process.c:4573
4573 QUIT;
(gdb) finish
Run till exit from #0 0x0000000000788a69 in wait_reading_process_output (time_limit=5, nsecs=0, read_kbd=0, do_display=false,
wait_for_cell=17528851, wait_proc=0x0, just_wait_proc=0) at process.c:4573
^Z
Program received signal SIGTSTP, Stopped (user).
0x0000000807444cfa in _sigprocmask () from /lib/libc.so.7
(gdb) finish
Run till exit from #0 0x0000000807444cfa in _sigprocmask () from /lib/libc.so.7
0x0000000804656526 in pthread_sigmask () from /lib/libthr.so.3
(gdb) finish
Run till exit from #0 0x0000000804656526 in pthread_sigmask () from /lib/libthr.so.3
unblock_atimers (oldset=0x7fffffff7920) at atimer.c:76
76 }
(gdb) finish
Run till exit from #0 unblock_atimers (oldset=0x7fffffff7920) at atimer.c:76
do_pending_atimers () at atimer.c:438
438 }
(gdb) finish
Run till exit from #0 do_pending_atimers () at atimer.c:438
process_pending_signals () at keyboard.c:7044
7044 }
(gdb) finish
Run till exit from #0 process_pending_signals () at keyboard.c:7044
Fmake_list (length=0, init=0) at alloc.c:2689
2689 while (size > 0)
(gdb) finish
Run till exit from #0 Fmake_list (length=0, init=0) at alloc.c:2689
0x0000000000713c2a in concat (nargs=1, args=0x7fffffff7ad8, target_type=Lisp_Cons, last_special=false) at fns.c:633
633 val = Fmake_list (make_number (result_len), Qnil);
Value returned is $7 = 757173027
(gdb) finish
Run till exit from #0 0x0000000000713c2a in concat (nargs=1, args=0x7fffffff7ad8, target_type=Lisp_Cons, last_special=false)
at fns.c:633
Fcopy_sequence (arg=21640739) at fns.c:502
502 }
Value returned is $8 = 757173027
(gdb) finish
Run till exit from #0 Fcopy_sequence (arg=21640739) at fns.c:502
0x00000000005f25b3 in timer_check () at keyboard.c:4452
4452 timers = Fcopy_sequence (Vtimer_list);
Value returned is $9 = 757173027
(gdb) finish
Run till exit from #0 0x00000000005f25b3 in timer_check () at keyboard.c:4452
readable_events (flags=1) at keyboard.c:3313
3313 if (kbd_fetch_ptr != kbd_store_ptr)
Value returned is $10 = {tv_sec = 0, tv_nsec = -1}
(gdb) finish
Run till exit from #0 readable_events (flags=1) at keyboard.c:3313
0x00000000005f7963 in get_input_pending (flags=1) at keyboard.c:6691
6691 input_pending = (!NILP (Vquit_flag) || readable_events (flags));
Value returned is $11 = true
(gdb) finish
Run till exit from #0 0x00000000005f7963 in get_input_pending (flags=1) at keyboard.c:6691
swallow_events (do_display=false) at keyboard.c:4205
4205 if (!input_pending && timers_run != old_timers_run && do_display)
Value returned is $12 = true
(gdb) finish
Run till exit from #0 swallow_events (do_display=false) at keyboard.c:4205
wait_reading_process_output (time_limit=5, nsecs=0, read_kbd=0, do_display=false, wait_for_cell=17528851, wait_proc=0x0,
just_wait_proc=0) at process.c:5004
5004 if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell)))
(gdb) next
5013 if (read_kbd && interrupt_input
(gdb) next
5020 if (read_kbd || ! NILP (wait_for_cell))
(gdb) next
5021 do_pending_window_change (0);
(gdb) next
5024 if (no_avail || nfds == 0)
(gdb) next
5025 continue;
(gdb) next
5215 } /* End while exit conditions not met. */
(gdb) next
4567 bool process_skipped = false;
(gdb) next
4572 if (read_kbd >= 0)
(gdb) next
4573 QUIT;
(gdb) next
4578 if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell)))
(gdb) next
4583 if (wait == TIMEOUT)
(gdb) next
4585 if (!timespec_valid_p (now))
(gdb) next
4587 if (timespec_cmp (end_time, now) <= 0)
(gdb) next
4589 timeout = timespec_sub (end_time, now);
(gdb) next
4598 if (NILP (wait_for_cell)
(gdb) next
4642 if (read_kbd < 0)
(gdb) next
4649 if (update_tick != process_tick)
(gdb) next
4681 if (wait_proc && wait_proc->raw_status_new)
(gdb) next
4683 if (wait_proc
(gdb) next
4727 if (wait_proc && just_wait_proc)
(gdb) next
4735 else if (!NILP (wait_for_cell))
(gdb) next
4737 Available = non_process_wait_mask;
(gdb) next
4738 check_delay = 0;
(gdb) next
4739 check_write = 0;
(gdb) next
4757 if (frame_garbaged && do_display)
(gdb) next
4769 no_avail = 0;
(gdb) next
4770 if ((read_kbd || !NILP (wait_for_cell))
(gdb) next
4771 && detect_input_pending ())
(gdb) next
4773 nfds = read_kbd ? 0 : 1;
(gdb) next
4774 no_avail = 1;
(gdb) next
4775 FD_ZERO (&Available);
(gdb) next
4910 xerrno = errno;
(gdb) next
4913 clear_waiting_for_input ();
(gdb) next
4916 do_pending_window_change (0);
(gdb) next
4918 if (nfds == 0)
(gdb) next
4942 if (nfds < 0)
(gdb) next
4956 if (read_kbd != 0)
(gdb) next
4983 if (read_kbd != 0
(gdb) next
4994 if (read_kbd == 0 && detect_input_pending ())
(gdb) next
4996 swallow_events (do_display);
(gdb) next
5004 if (! NILP (wait_for_cell) && ! NILP (XCAR (wait_for_cell)))
(gdb) next
5013 if (read_kbd && interrupt_input
(gdb) next
5020 if (read_kbd || ! NILP (wait_for_cell))
(gdb) next
5021 do_pending_window_change (0);
(gdb) next
5024 if (no_avail || nfds == 0)
(gdb) next
5025 continue;
(gdb) next
5215 } /* End while exit conditions not met. */
(gdb)
[signature.asc (application/pgp-signature, inline)]
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997,2003 nCipher Corporation Ltd,
1994-97 Ian Jackson.