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bug#13964: 24.3; randomize_va_space is back
From: |
Trent W. Buck |
Subject: |
bug#13964: 24.3; randomize_va_space is back |
Date: |
Fri, 15 Mar 2013 21:07:39 +1100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
I ran into this problem:
http://article.gmane.org/gmane.emacs.devel/35276
This fixed it (it was set to 2):
# echo 0 > /proc/sys/kernel/randomize_va_space
I didn't try setarch -R because I couldn't guess what my arch was to
tell setarch (I tried everything I could think of from "armv7l" to
"ventana").
I'm too lazy to read the whole 2005 thread. Since etc/PROBLEMS doesn't
mention this issue, only the exec-shield one, I guess this problem was
supposed to be fixed at the time -- so why did I see it today?
In GNU Emacs 24.3.1 (armv7l-unknown-linux-gnueabi)
of 2013-03-15 on elba
System Description: Ubuntu 11.10
Configured using:
`configure '--without-x' '--without-sound' '--without-all'
'--with-x-toolkit=no' '--with-xpm=no' '--with-gif=no' '--with-jpeg=no'
'--with-tiff=no' '--with-png=no' '--with-dbus=no' '--with-gsettings=no'
'--with-gnutls=no' '--prefix=/home/twb/opt/emacs-24.3''
Important settings:
value of $LC_COLLATE: C
value of $LANG: en_AU.utf8
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
Major mode: Fundamental
Minor modes in effect:
ido-everywhere: t
savehist-mode: t
icomplete-mode: t
show-paren-mode: t
delete-selection-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
column-number-mode: t
line-number-mode: t
transient-mark-mode: t
Recent input:
Recent messages:
("emacs" "-f" "report-emacs-bug")
Loading term/xterm...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Load-path shadows:
None found.
Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader sendmail regexp-opt rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils advice help-fns cl-lib
advice-preload jka-compr edmacro kmacro ido savehist icomplete time-date
paren delsel saveplace ediff-hook vc-hooks lisp-float-type
tabulated-list newcomment lisp-mode register page menu-bar rfn-eshadow
timer 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 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)
>From IRC debugging:
twb> I'm trying to build emacs from source; there's a point where temacs
twb> deliberately dumps core to make the real "emacs".
twb>
twb> I get "Warning: Your system has a gap between BSS and the heap
twb> (15825968 bytes). This usually means that exec-shield or something
twb> similar is in effect. The dump may fail because of this. See the
twb> section about exec-shield in etc/PROBLEMS for more information."
twb>
twb> System is an arm Ubuntu 11.10 (tegra2), non-standard kernel and
twb> nonstandard(?) gcc (Ubuntu/Linaro 4.6.1-9ubuntu3), apparmor is not
twb> installed.
twb>
twb> etc/PROBLEMS says to check /proc/sys/kernel/exec-shield -- I have no
twb> such file.
twb>
twb> What should I check next?
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