bug#4233: elp (profiler) / broken functions

[Andreas Politz, INF-I-MA]

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the bug-gnu-emacs@gnu.org mailing list,
and to the gnu.emacs.bug news group.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:



There are some more functions elp does not handle well
and may break emacs severely.  They should be included in 
`elp-not-profilable'.

1. Function which breaks after instrumenting :
+

2. Functions which can not be restored properly :
byte-code-function-p
functionp
byte-code
subrp
indirect-function
fboundp

I checked this by trial-and-error with the following code.

(progn
  (require 'cl)
  (require 'elp)
  (let ((fn
         (mapcar #'intern
                 (all-completions
                  "" obarray
                  #'(lambda (sym)
                      (and (elp-profilable-p sym)
                           (not (memq sym
                                      '(+
                                        byte-code-function-p
                                        functionp
                                        byte-code
                                        subrp
                                        indirect-function
                                        fboundp
                                        )))))))))
    (dolist (f fn)
      (setq cur f)
      (elp-instrument-function f)
      (elp-restore-function f)
      (when (and (listp (symbol-function cur))
                 (eq (car (symbol-function cur))
                     'lambda)
                 (listp (caddr (symbol-function cur)))
                 (eq (caaddr (symbol-function cur))
                     'elp-wrapper))
        (goto-char (point-max))
        (insert (format "%s\n" cur))
        (save-buffer)))))





If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/home/politza/src/emacs-23.1.rc1/etc/DEBUG for instructions.


In GNU Emacs 23.1.1 (x86_64-pc-linux-gnu, GTK+ Version 2.16.1)
 of 2009-08-08 on raven
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
configured using `configure  '--build' 'x86_64-linux-gnu' '--prefix=/usr'
'--mandir=${prefix}/share/man' '--infodir=${prefix}/share/info' 'CFLAGS=-g
-O2' 'LDFLAGS=-Wl,-z,defs' 'build_alias=x86_64-linux-gnu' 'CPPFLAGS=''

Important settings:
  value of $LC_ALL: C
  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: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  tooltip-mode: t
  tool-bar-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
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t