bug#43389: 28.0.50; Emacs memory leaks using hard disk all time

[Jean Louis <bugs@gnu.support>]

* Carlos O'Donell <carlos@redhat.com> [2020-11-23 23:06]:
> On 11/23/20 2:55 PM, Jean Louis wrote:
> > * Carlos O'Donell <carlos@redhat.com> [2020-11-23 22:37]:
> >>>
> >>> # MTRACE_CTL_VERBOSE=1
> >>> MTRACE_CTL_FILE=/home/data1/protected/tmp/mtraceEMACS.mtr LD_PRELOAD=/home/data1/protected/Programming/git/glibc-malloc-trace-utils/libmtrace.so emacs >> $DEBUG 2>&1
> >>>
> >>> I have tried like above and it will block as soon as eww is loads some
> >>> page with the same error as previously.
> >>
> >> That's interesting. Are you able to attach gdb and get a backtrace to see
> >> what the process is blocked on?
> > 
> > I can do C-g one time to interrupt something going on, then I get error
> > 
> > (gdb) continue
> Please issue 'thread apply all backtrace' to get a backtrace from all
> the threads to see where they are stuck.
> 
> You will need debug information for this for all associated frames in
> the backtrace. Depending on your distribution this may require debug
> information packages.

sudo gdb -pid 25584
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Attaching to process 25584
[New LWP 25585]
[New LWP 25586]
[New LWP 25588]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
0x00007f6afd4765dc in pselect () from /lib/libc.so.6
(gdb) continue
Continuing.
[New Thread 0x7f6aed1dbc00 (LWP 25627)]
[Thread 0x7f6aed1dbc00 (LWP 25627) exited]
[New Thread 0x7f6aed1dbc00 (LWP 25628)]
[Thread 0x7f6aed1dbc00 (LWP 25628) exited]
  C-c C-c
Thread 1 "emacs" received signal SIGINT, Interrupt.
0x00007f6afd4765dc in pselect () from /lib/libc.so.6
(gdb) thread apply backtrace
Invalid thread ID: backtrace
(gdb) thread apply all backtrace

Thread 4 (Thread 0x7f6aee2ae700 (LWP 25588)):
#0  0x00007f6afd47435d in poll () at /lib/libc.so.6
#1  0x00007f6b011a4b98 in  () at /lib/libglib-2.0.so.0
#2  0x00007f6b011a4f52 in g_main_loop_run () at /lib/libglib-2.0.so.0
#3  0x00007f6b019b62c8 in  () at /usr/lib/libgio-2.0.so.0
#4  0x00007f6b011ccfca in  () at /lib/libglib-2.0.so.0
#5  0x00007f6afe242069 in start_thread () at /lib/libpthread.so.0
#6  0x00007f6afd47e30f in clone () at /lib/libc.so.6

Thread 3 (Thread 0x7f6aeeaaf700 (LWP 25586)):
#0  0x00007f6afd47435d in poll () at /lib/libc.so.6
#1  0x00007f6b011a4b98 in  () at /lib/libglib-2.0.so.0
#2  0x00007f6b011a4cbe in g_main_context_iteration () at /lib/libglib-2.0.so.0
#3  0x00007f6aeeab755d in  () at /usr/lib/gio/modules/libdconfsettings.so
#4  0x00007f6b011ccfca in  () at /lib/libglib-2.0.so.0
#5  0x00007f6afe242069 in start_thread () at /lib/libpthread.so.0
#6  0x00007f6afd47e30f in clone () at /lib/libc.so.6

Thread 2 (Thread 0x7f6aef6c8700 (LWP 25585)):
#0  0x00007f6afd47435d in poll () at /lib/libc.so.6
#1  0x00007f6b011a4b98 in  () at /lib/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#2  0x00007f6b011a4cbe in g_main_context_iteration () at /lib/libglib-2.0.so.0
#3  0x00007f6b011a4d12 in  () at /lib/libglib-2.0.so.0
#4  0x00007f6b011ccfca in  () at /lib/libglib-2.0.so.0
#5  0x00007f6afe242069 in start_thread () at /lib/libpthread.so.0
#6  0x00007f6afd47e30f in clone () at /lib/libc.so.6

Thread 1 (Thread 0x7f6b049e9100 (LWP 25584)):
#0  0x00007f6afd4765dc in pselect () at /lib/libc.so.6
#1  0x00000000005cf500 in really_call_select (arg=0x7ffc16edfa80) at thread.c:592
#2  0x00000000005d006e in flush_stack_call_func (arg=0x7ffc16edfa80, func=0x5cf4b0 <really_call_select>) at lisp.h:3791
#3  0x00000000005d006e in thread_select (func=<optimized out>, max_fds=max_fds@entry=19, rfds=rfds@entry=0x7ffc16edfb60, wfds=wfds@entry=0x7ffc16edfbe0, efds=efds@entry=0x0, timeout=timeout@entry=0x7ffc16ee0170, sigmask=0x0) at thread.c:624
#4  0x00000000005eb023 in xg_select (fds_lim=19, rfds=rfds@entry=0x7ffc16ee02a0, wfds=0x7ffc16ee0320, efds=<optimized out>, timeout=<optimized out>, sigmask=<optimized out>) at xgselect.c:131
#5  0x00000000005aeab4 in wait_reading_process_output (time_limit=time_limit@entry=30, nsecs=nsecs@entry=0, read_kbd=-1, do_display=do_display@entry=true, wait_for_cell=wait_for_cell@entry=0x0, wait_proc=wait_proc@entry=0x0, just_wait_proc=0) at process.c:5604
#6  0x00000000004253f8 in sit_for (timeout=timeout@entry=0x7a, reading=reading@entry=true, display_option=display_option@entry=1) at dispnew.c:6111
#7  0x00000000004fe415 in read_char (commandflag=commandflag@entry=1, map=map@entry=0x3184a63, p---Type <return> to continue, or q <return> to quit---
rev_event=<optimized out>, used_mouse_menu=used_mouse_menu@entry=0x7ffc16ee0b5b, end_time=end_time@entry=0x0) at keyboard.c:2742
#8  0x0000000000500841 in read_key_sequence (keybuf=keybuf@entry=0x7ffc16ee0c50, prompt=prompt@entry=0x0, dont_downcase_last=dont_downcase_last@entry=false, can_return_switch_frame=can_return_switch_frame@entry=true, fix_current_buffer=fix_current_buffer@entry=true, prevent_redisplay=prevent_redisplay@entry=false) at keyboard.c:9546
#9  0x0000000000502040 in command_loop_1 () at keyboard.c:1354
#10 0x000000000056a40e in internal_condition_case (bfun=bfun@entry=0x501e30 <command_loop_1>, handlers=handlers@entry=0x90, hfun=hfun@entry=0x4f8da0 <cmd_error>) at eval.c:1359
#11 0x00000000004f370c in command_loop_2 (ignore=ignore@entry=0x0) at keyboard.c:1095
#12 0x000000000056a3ac in internal_catch (tag=tag@entry=0xd740, func=func@entry=0x4f36f0 <command_loop_2>, arg=arg@entry=0x0) at eval.c:1120
#13 0x00000000004f36c9 in command_loop () at keyboard.c:1074
#14 0x00000000004f89c6 in recursive_edit_1 () at keyboard.c:718
#15 0x00000000004f8ce4 in Frecursive_edit () at keyboard.c:790
#16 0x000000000041a8f3 in main (argc=1, argv=0x7ffc16ee1048) at emacs.c:2047
(gdb)