GNU bug report logs - #22790
24.5; Infinite loop involving malloc called from signal handler

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Andreas Gustafsson <gson <at> gson.org>
Subject: bug#22790: closed (Re: bug#22790: 24.5; Infinite loop involving
 malloc called from signal handler)
Date: Wed, 07 Dec 2016 21:07:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#22790: 24.5; Infinite loop involving malloc called from signal handler

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 22790 <at> debbugs.gnu.org.

-- 
22790: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=22790
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Glenn Morris <rgm <at> gnu.org>
To: 22790-done <at> debbugs.gnu.org
Subject: Re: bug#22790: 24.5;
 Infinite loop involving malloc called from signal handler
Date: Wed, 07 Dec 2016 16:06:45 -0500

Eli Zaretskii wrote:

>> I have not yet checked if emacs 25 has the same bug.
>
> Please do.  Emacs 24 is no longer maintained.

No further response in months.
I suggest opening a new report if the issue persists in Emacs 25.

[Message part 3 (message/rfc822, inline)]

From: Andreas Gustafsson <gson <at> gson.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.5; Infinite loop involving malloc called from signal handler
Date: Wed, 24 Feb 2016 15:08:21 +0200

I'm using emacs and the VM package to read mail under NetBSD 6.1.5 on a
daily basis, often working with mailboxes many tens of megabytes in
size.  Once every few days of doing this, emacs becomes unresponsive,
consuming 100% CPU.  I rebuilt emacs with debug symbols, and the last
time this happened, I caught the following backtrace:

(gdb) where
#0  0x00007f7ff6c08445 in ?? () from /usr/lib/libpthread.so.1
#1  0x00007f7ff6c08848 in ?? () from /usr/lib/libpthread.so.1
#2  0x00000000005c5486 in _malloc_internal (size=65536) at gmalloc.c:929
#3  0x00000000005c54fc in malloc (size=65536) at gmalloc.c:953
#4  0x00007f7ff60ed28c in __smakebuf () from /usr/lib/libc.so.12
#5  0x00007f7ff60ed125 in __swsetup () from /usr/lib/libc.so.12
#6  0x00007f7ff60cde92 in __vfprintf_unlocked () from /usr/lib/libc.so.12
#7  0x00007f7ff60d1258 in vfprintf () from /usr/lib/libc.so.12
#8  0x00007f7ff60cc266 in printf () from /usr/lib/libc.so.12
#9  0x00000000004db715 in handle_interrupt (in_signal_handler=true) at keyboard.c:10364
#10 0x00000000004db63e in handle_interrupt_signal (sig=2) at keyboard.c:10288
#11 0x00000000004e8b63 in deliver_process_signal (sig=2, handler=0x4db5f1 <handle_interrupt_signal>) at sysdep.c:1570
#12 0x00000000004db65a in deliver_interrupt_signal (sig=2) at keyboard.c:10295
#13 <signal handler called>
#14 0x00007f7ff6c083e2 in ?? () from /usr/lib/libpthread.so.1
#15 0x00007f7ff6c08445 in ?? () from /usr/lib/libpthread.so.1
#16 0x00007f7ff6c08848 in ?? () from /usr/lib/libpthread.so.1
#17 0x00000000005c626f in _free_internal (ptr=0x33e0000) at gmalloc.c:1268
#18 0x00000000005c62ca in free (ptr=0x33e0000) at gmalloc.c:1283
#19 0x0000000000535046 in xfree (block=0x33e0000) at alloc.c:735
#20 0x000000000055ba6d in unbind_to (count=2, value=11946034) at eval.c:3304
#21 0x000000000055715d in unwind_to_catch (catch=0xfbf600, value=45248038) at eval.c:1161
#22 0x000000000055806a in Fsignal (error_symbol=12016098, data=11946034) at eval.c:1557
#23 0x00000000004db9c7 in handle_interrupt (in_signal_handler=true) at keyboard.c:10421
#24 0x00000000004db63e in handle_interrupt_signal (sig=2) at keyboard.c:10288
#25 0x00000000004e8b63 in deliver_process_signal (sig=2, handler=0x4db5f1 <handle_interrupt_signal>) at sysdep.c:1570
#26 0x00000000004db65a in deliver_interrupt_signal (sig=2) at keyboard.c:10295
#27 <signal handler called>
#28 0x00007f7ff60ec172 in memmove () from /usr/lib/libc.so.12
#29 0x00000000005c7c7a in r_alloc_sbrk (size=8527872) at ralloc.c:821
#30 0x00000000005c42b7 in align (size=8527872) at gmalloc.c:423
#31 0x00000000005c46c9 in morecore_nolock (size=8527872) at gmalloc.c:624
#32 0x00000000005c4fc9 in _malloc_internal_nolock (size=8394752) at gmalloc.c:863
#33 0x00000000005c6571 in _realloc_internal_nolock (ptr=0x2be0000, size=8394752) at gmalloc.c:1424
#34 0x00000000005c66fe in _realloc_internal (ptr=0x2be0000, size=8394752) at gmalloc.c:1480
#35 0x00000000005c6773 in realloc (ptr=0x2be0000, size=8394752) at gmalloc.c:1495
#36 0x0000000000534fec in xrealloc (block=0x2be0000, size=8394752) at alloc.c:717
#37 0x0000000000473021 in coding_alloc_by_realloc (coding=0x7f7fffff9a70, bytes=6144) at coding.c:1061
#38 0x000000000047337c in alloc_destination (coding=0x7f7fffff9a70, nbytes=6144, dst=0x33df400 "") at coding.c:1102
#39 0x00000000004881f2 in encode_coding_raw_text (coding=0x7f7fffff9a70) at coding.c:5429
#40 0x0000000000490639 in encode_coding (coding=0x7f7fffff9a70) at coding.c:7802
#41 0x0000000000492467 in encode_coding_object (coding=0x7f7fffff9a70, src_object=40695813, from=8388609, from_byte=8407959, to=16777217, to_byte=16796567, dst_object=11946082)
    at coding.c:8371
#42 0x000000000050dcef in e_write (desc=6, string=11946034, start=8388609, end=52984520, coding=0x7f7fffff9a70) at fileio.c:5256
#43 0x000000000050d8e9 in a_write (desc=6, string=11946034, pos=1, nchars=52984519, annot=0x7f7fffff9da8, coding=0x7f7fffff9a70) at fileio.c:5172
#44 0x000000000050ce5f in write_region (start=4, end=211938080, filename=33678465, append=11946034, visit=11946082, lockname=33724897, mustbenew=11946034, desc=6) at fileio.c:4870
#45 0x000000000050c758 in Fwrite_region (start=11946034, end=11946034, filename=33678465, append=11946034, visit=11946082, lockname=33724897, mustbenew=11946034) at fileio.c:4679
#46 0x000000000055ab18 in Ffuncall (nargs=7, args=0x7f7fffffa070) at eval.c:2837
#47 0x0000000000599506 in exec_byte_code (bytestr=8987609, vector=8987645, maxdepth=76, args_template=0, nargs=0, args=0x7f7fffffa5b0) at bytecode.c:916
#48 0x000000000055b0c7 in funcall_lambda (fun=8987565, nargs=0, arg_vector=0x7f7fffffa5b0) at eval.c:2978
#49 0x000000000055abb1 in Ffuncall (nargs=1, args=0x7f7fffffa5a8) at eval.c:2860
#50 0x0000000000599506 in exec_byte_code (bytestr=8987417, vector=8987453, maxdepth=12, args_template=0, nargs=0, args=0x7f7fffffaab0) at bytecode.c:916
#51 0x000000000055b0c7 in funcall_lambda (fun=8987373, nargs=0, arg_vector=0x7f7fffffaab0) at eval.c:2978
#52 0x000000000055abb1 in Ffuncall (nargs=1, args=0x7f7fffffaaa8) at eval.c:2860
#53 0x0000000000599506 in exec_byte_code (bytestr=8986145, vector=8986181, maxdepth=40, args_template=0, nargs=0, args=0x7f7fffffafc0) at bytecode.c:916
#54 0x000000000055b0c7 in funcall_lambda (fun=8986093, nargs=0, arg_vector=0x7f7fffffafc0) at eval.c:2978
#55 0x000000000055abb1 in Ffuncall (nargs=1, args=0x7f7fffffafb8) at eval.c:2860
#56 0x0000000000599506 in exec_byte_code (bytestr=8984849, vector=8984885, maxdepth=20, args_template=1024, nargs=0, args=0x7f7fffffb4a8) at bytecode.c:916
#57 0x000000000055b0c7 in funcall_lambda (fun=8984797, nargs=0, arg_vector=0x7f7fffffb4a8) at eval.c:2978
#58 0x000000000055abb1 in Ffuncall (nargs=1, args=0x7f7fffffb4a0) at eval.c:2860
#59 0x0000000000599506 in exec_byte_code (bytestr=8989777, vector=8989813, maxdepth=8, args_template=1028, nargs=1, args=0x7f7fffffba20) at bytecode.c:916
#60 0x000000000055b0c7 in funcall_lambda (fun=8989733, nargs=1, arg_vector=0x7f7fffffba18) at eval.c:2978
#61 0x000000000055abb1 in Ffuncall (nargs=2, args=0x7f7fffffba10) at eval.c:2860
#62 0x0000000000599506 in exec_byte_code (bytestr=8723753, vector=8723789, maxdepth=140, args_template=6156, nargs=5, args=0x7f7fffffbfc0) at bytecode.c:916
#63 0x000000000055b0c7 in funcall_lambda (fun=8723709, nargs=5, arg_vector=0x7f7fffffbf98) at eval.c:2978
#64 0x000000000055abb1 in Ffuncall (nargs=6, args=0x7f7fffffbf90) at eval.c:2860
#65 0x0000000000599506 in exec_byte_code (bytestr=8989113, vector=8989149, maxdepth=64, args_template=2048, nargs=2, args=0x7f7fffffc4c8) at bytecode.c:916
#66 0x000000000055b0c7 in funcall_lambda (fun=8989061, nargs=2, arg_vector=0x7f7fffffc4b8) at eval.c:2978
#67 0x000000000055abb1 in Ffuncall (nargs=3, args=0x7f7fffffc4b0) at eval.c:2860
#68 0x0000000000599506 in exec_byte_code (bytestr=9007353, vector=9007389, maxdepth=64, args_template=1024, nargs=1, args=0x7f7fffffca10) at bytecode.c:916
#69 0x000000000055b0c7 in funcall_lambda (fun=9007301, nargs=1, arg_vector=0x7f7fffffca08) at eval.c:2978
#70 0x000000000055abb1 in Ffuncall (nargs=2, args=0x7f7fffffca00) at eval.c:2860
#71 0x0000000000599506 in exec_byte_code (bytestr=9008337, vector=9008373, maxdepth=16, args_template=1024, nargs=1, args=0x7f7fffffcf40) at bytecode.c:916
#72 0x000000000055b0c7 in funcall_lambda (fun=9008285, nargs=1, arg_vector=0x7f7fffffcf38) at eval.c:2978
#73 0x000000000055abb1 in Ffuncall (nargs=2, args=0x7f7fffffcf30) at eval.c:2860
#74 0x00000000005552cf in Fcall_interactively (function=16250050, record_flag=11946034, keys=11998845) at callint.c:836
#75 0x000000000055aa05 in Ffuncall (nargs=4, args=0x7f7fffffd238) at eval.c:2818
#76 0x0000000000599506 in exec_byte_code (bytestr=9460233, vector=9460269, maxdepth=52, args_template=4100, nargs=1, args=0x7f7fffffd750) at bytecode.c:916
#77 0x000000000055b0c7 in funcall_lambda (fun=9460189, nargs=1, arg_vector=0x7f7fffffd748) at eval.c:2978
#78 0x000000000055abb1 in Ffuncall (nargs=2, args=0x7f7fffffd740) at eval.c:2860
#79 0x000000000055a35f in call1 (fn=12009122, arg1=16250050) at eval.c:2610
#80 0x00000000004cb8a9 in command_loop_1 () at keyboard.c:1560
#81 0x0000000000557882 in internal_condition_case (bfun=0x4cb1f1 <command_loop_1>, handlers=12016002, hfun=0x4cab3b <cmd_error>) at eval.c:1348
#82 0x00000000004caf5d in command_loop_2 (ignore=11946034) at keyboard.c:1178
#83 0x00000000005570b5 in internal_catch (tag=12008098, func=0x4caf37 <command_loop_2>, arg=11946034) at eval.c:1112
#84 0x00000000004caf0f in command_loop () at keyboard.c:1157
#85 0x00000000004ca737 in recursive_edit_1 () at keyboard.c:778
#86 0x00000000004ca8a4 in Frecursive_edit () at keyboard.c:849
#87 0x00000000004c8aa4 in main (argc=4, argv=0x7f7fffffdb80) at emacs.c:1642
(gdb) 

For obvious reasons, the information below is not from the same emacs
process, but it is from the same binary.

In GNU Emacs 24.5.1 (x86_64--netbsd)
 of 2016-02-14 on guava.gson.org
Configured using:
 `configure --srcdir=/usr/pkgsrc/editors/emacs24/work/emacs-24.5
 --localstatedir=/var --without-dbus --without-gnutls --without-rsvg
 --without-x --without-xpm --without-jpeg --without-tiff --without-gif
 --without-png --prefix=/usr/pkg --build=x86_64--netbsd
 --host=x86_64--netbsd --infodir=/usr/pkg/info --mandir=/usr/pkg/man
 'CFLAGS=-g -I/usr/include -I/usr/pkg/include' 'CPPFLAGS=-DTERMINFO
 -I/usr/include -I/usr/pkg/include' 'LDFLAGS=-L/usr/lib -Wl,-R/usr/lib
 -L/usr/pkg/lib -Wl,-R/usr/pkg/lib''

Important settings:
  locale-coding-system: nil

Major mode: Debugger

Minor modes in effect:
  tooltip-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
Note: c-basic-offset adjusted to 2 for buffer keyboard.c.
Mark set [2 times]
Note: c-basic-offset adjusted to 2 for buffer sysdep.c.
Mark set
Mark saved where search started [2 times]
Mark set
scroll-up-command: End of buffer
Command: next 1
Undo!
Mark saved where search started

Load-path shadows:
/u/gson/lisp/tempo hides /usr/pkg/share/emacs/24.5/lisp/tempo
/usr/pkg/share/emacs/site-lisp/ispell/ispell hides /usr/pkg/share/emacs/24.5/lisp/textmodes/ispell

Features:
(shadow sort gnus-util mail-extr warnings emacsbug message format-spec
rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
mm-util help-fns mail-prsvr mail-utils cc-langs cc-mode cc-fonts
easymenu cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine misearch
multi-isearch gdb-mi cl-loaddefs cl-lib bindat json gud tool-bar
easy-mmode comint ansi-color ring xterm time-date guess-offset cc-vars
cc-defs regexp-opt tooltip electric uniquify ediff-hook vc-hooks
lisp-float-type tabulated-list newcomment lisp-mode prog-mode register
page menu-bar rfn-eshadow timer select mouse jit-lock font-lock syntax
facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak
czech european ethiopic indian cyrillic chinese case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button
faces cus-face macroexp files text-properties overlay sha1 md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process multi-tty emacs)

Memory information:
((conses 16 138264 9026)
 (symbols 48 20788 0)
 (miscs 40 86 618)
 (strings 32 21808 4914)
 (string-bytes 1 693311)
 (vectors 16 11410)
 (vector-slots 8 384549 3962)
 (floats 8 69 395)
 (intervals 56 2366 101)
 (buffers 960 19))

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