run an application that starts pthreads (like i.e. citadels citserver or webcit) start it in GUD, it will spawn threads. hold the process using C-cC-c type thread apply all bt you should get a stacktrace for each thread; you only get some binary chars. In GNU Emacs 24.1.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.10)  of 2012-09-05 on potzblitz, modified by Debian Windowing system distributor `The X.Org Foundation', version 11.0.11203000 Configured using:  `configure '--build' 'x86_64-linux-gnu' '--build' 'x86_64-linux-gnu'  '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'  '--localstatedir=/var/lib' '--infodir=/usr/share/info'  '--mandir=/usr/share/man' '--with-pop=yes'  '--enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.1/ site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.1/site-lisp:/us r/share/emacs/site-lisp'  '--with-crt-dir=/usr/lib/x86_64-linux-gnu' '--with-x=yes'  '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars'  'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector  --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall'  'CPPFLAGS=-D_FORTIFY_SOURCE=2'' Important settings:   value of $LC_ALL: nil   value of $LC_COLLATE: nil   value of $LC_CTYPE: nil   value of $LC_MESSAGES: nil   value of $LC_MONETARY: nil   value of $LC_NUMERIC: nil   value of $LC_TIME: nil   value of $LANG: nil   value of $XMODIFIERS: nil   locale-coding-system: nil   default enable-multibyte-characters: t Major mode: C/l Minor modes in effect:   shell-dirtrack-mode: t   delete-selection-mode: t   pc-selection-mode: t   diff-auto-refine-mode: t   tooltip-mode: t   mouse-wheel-mode: t   menu-bar-mode: t   file-name-shadow-mode: t   global-font-lock-mode: t   font-lock-mode: t   blink-cursor-mode: t   auto-composition-mode: t   auto-encryption-mode: t   auto-compression-mode: t   line-number-mode: t   transient-mark-mode: t   abbrev-mode: t Recent input: C-x k C-x C-f s r c / c i / w e / i c a s u c C-x C-f l i b c / l i b / s t r c C-s s p l i c e ( C-s C-s C-s C-s C-x k M-x r e p o r t Recent messages: Package pc-select is obsolete! Package pc-mode is obsolete! Making completion list... Loading vc-git...done (No files need saving) Compilation finished Mark saved where search started Mark set Mark saved where search started Making completion list... Load-path shadows: ~/.emacs.d/psvn hides /usr/share/emacs/site-lisp/psvn /usr/share/emacs/24.1/site-lisp/cmake-data/cmake-mode hides /usr/share/emacs/site-lisp/cmake-mode /usr/share/emacs/24.1/site-lisp/debian-startup hides /usr/share/emacs/site-lisp/debian-startup /usr/share/emacs24/site-lisp/flim/md4 hides /usr/share/emacs/24.1/lisp/md4 /usr/share/emacs24/site-lisp/flim/hex-util hides /usr/share/emacs/24.1/lisp/hex-util /usr/share/emacs24/site-lisp/dictionaries-common/ispell hides /usr/share/emacs/24.1/lisp/textmodes/ispell /usr/share/emacs24/site-lisp/dictionaries-common/flyspell hides /usr/share/emacs/24.1/lisp/textmodes/flyspell ~/.emacs.d/goto-addr hides /usr/share/emacs/24.1/lisp/net/goto-addr /usr/share/emacs24/site-lisp/flim/sasl-digest hides /usr/share/emacs/24.1/lisp/net/sasl-digest /usr/share/emacs24/site-lisp/flim/sasl hides /usr/share/emacs/24.1/lisp/net/sasl /usr/share/emacs24/site-lisp/flim/hmac-md5 hides /usr/share/emacs/24.1/lisp/net/hmac-md5 /usr/share/emacs24/site-lisp/flim/sasl-cram hides /usr/share/emacs/24.1/lisp/net/sasl-cram /usr/share/emacs24/site-lisp/flim/ntlm hides /usr/share/emacs/24.1/lisp/net/ntlm /usr/share/emacs24/site-lisp/flim/sasl-ntlm hides /usr/share/emacs/24.1/lisp/net/sasl-ntlm /usr/share/emacs24/site-lisp/flim/hmac-def hides /usr/share/emacs/24.1/lisp/net/hmac-def Features: (shadow sort gnus-util mail-extr 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 mail-prsvr mail-utils multi-isearch gdb-mi bindat json gud shell pcomplete compile comint ansi-color vc-git help-mode view pc-mode delsel pc-select server oddmuse simple-wiki track-scroll psvn log-edit ring pcvs-util add-log diff-mode easy-mmode pp elp ediff-merg ediff-diff ediff-wind ediff-mult ediff-help ediff-init ediff-util dired column-marker vcard-mode php-mode derived cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs regexp-opt speedbar sb-image ezimage dframe assoc color-theme easymenu edmacro kmacro wid-edit cl goto-addr thingatpt debian-el debian-el-loaddefs dpkg-dev-el dpkg-dev-el-loaddefs time-date tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer select scroll-bar 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 loaddefs button faces cus-face files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process dbusbind dynamic-setting system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty emacs) = --  o__ _> / _ (_) \(_)...