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Diffstat (limited to 'lisp/find-gc.el')
| -rw-r--r-- | lisp/find-gc.el | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/lisp/find-gc.el b/lisp/find-gc.el deleted file mode 100644 index 4bce53c9184..00000000000 --- a/lisp/find-gc.el +++ /dev/null @@ -1,152 +0,0 @@ -;;; find-gc.el --- detect functions that call the garbage collector - -;; Copyright (C) 1992 Free Software Foundation, Inc. - -;; Maintainer: FSF - -;; This file is part of GNU Emacs. - -;; GNU Emacs is free software; you can redistribute it and/or modify -;; it under the terms of the GNU General Public License as published by -;; the Free Software Foundation; either version 2, or (at your option) -;; any later version. - -;; GNU Emacs is distributed in the hope that it will be useful, -;; but WITHOUT ANY WARRANTY; without even the implied warranty of -;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -;; GNU General Public License for more details. - -;; You should have received a copy of the GNU General Public License -;; along with GNU Emacs; see the file COPYING. If not, write to the -;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, -;; Boston, MA 02111-1307, USA. - -;;; Commentary: - -;; Produce in unsafe-list the set of all functions that may invoke GC. -;; This expects the Emacs sources to live in emacs-source-directory. -;; It creates a temporary working directory /tmp/esrc. - -;;; Code: - -(defun find-gc-unsafe () - (trace-call-tree nil) - (trace-use-tree) - (find-unsafe-funcs 'Fgarbage_collect) - (setq unsafe-list (sort unsafe-list - (function (lambda (x y) - (string-lessp (car x) (car y)))))) -) - -(setq emacs-source-directory "/usr/gnu/src/dist/src") - - -;;; This does a depth-first search to find all functions that can -;;; ultimately call the function "target". The result is an a-list -;;; in unsafe-list; the cars are the unsafe functions, and the cdrs -;;; are (one of) the unsafe functions that these functions directly -;;; call. - -(defun find-unsafe-funcs (target) - (setq unsafe-list (list (list target))) - (trace-unsafe target) -) - -(defun trace-unsafe (func) - (let ((used (assq func subrs-used))) - (or used - (error "No subrs-used for %s" (car unsafe-list))) - (while (setq used (cdr used)) - (or (assq (car used) unsafe-list) - (memq (car used) noreturn-list) - (progn - (setq unsafe-list (cons (cons (car used) func) unsafe-list)) - (trace-unsafe (car used)))))) -) - - -;;; Functions on this list are safe, even if they appear to be able -;;; to call the target. - -(setq noreturn-list '( Fsignal Fthrow wrong_type_argument )) - - -;;; This produces an a-list of functions in subrs-called. The cdr of -;;; each entry is a list of functions which the function in car calls. - -(defun trace-call-tree (&optional already-setup) - (message "Setting up directories...") - (or already-setup - (progn - ;; Gee, wouldn't a built-in "system" function be handy here. - (call-process "csh" nil nil nil "-c" "rm -rf /tmp/esrc") - (call-process "csh" nil nil nil "-c" "mkdir /tmp/esrc") - (call-process "csh" nil nil nil "-c" - (format "ln -s %s/*.[ch] /tmp/esrc" - emacs-source-directory)))) - (save-excursion - (set-buffer (get-buffer-create "*Trace Call Tree*")) - (setq subrs-called nil) - (let ((case-fold-search nil) - (files source-files) - name entry) - (while files - (message "Compiling %s..." (car files)) - (call-process "csh" nil nil nil "-c" - (format "gcc -dr -c /tmp/esrc/%s -o /dev/null" - (car files))) - (erase-buffer) - (insert-file-contents (concat "/tmp/esrc/" (car files) ".rtl")) - (while (re-search-forward ";; Function \\|(call_insn " nil t) - (if (= (char-after (- (point) 3)) ?o) - (progn - (looking-at "[a-zA-Z0-9_]+") - (setq name (intern (buffer-substring (match-beginning 0) - (match-end 0)))) - (message "%s : %s" (car files) name) - (setq entry (list name) - subrs-called (cons entry subrs-called))) - (if (looking-at ".*\n?.*\"\\([A-Za-z0-9_]+\\)\"") - (progn - (setq name (intern (buffer-substring (match-beginning 1) - (match-end 1)))) - (or (memq name (cdr entry)) - (setcdr entry (cons name (cdr entry)))))))) - (delete-file (concat "/tmp/esrc/" (car files) ".rtl")) - (setq files (cdr files))))) -) - - -;;; This was originally generated directory-files, but there were -;;; too many files there that were not actually compiled. The -;;; list below was created for a HP-UX 7.0 system. - -(setq source-files '("dispnew.c" "scroll.c" "xdisp.c" "window.c" - "term.c" "cm.c" "emacs.c" "keyboard.c" "macros.c" - "keymap.c" "sysdep.c" "buffer.c" "filelock.c" - "insdel.c" "marker.c" "minibuf.c" "fileio.c" - "dired.c" "filemode.c" "cmds.c" "casefiddle.c" - "indent.c" "search.c" "regex.c" "undo.c" - "alloc.c" "data.c" "doc.c" "editfns.c" - "callint.c" "eval.c" "fns.c" "print.c" "lread.c" - "abbrev.c" "syntax.c" "unexec.c" "mocklisp.c" - "bytecode.c" "process.c" "callproc.c" "doprnt.c" - "x11term.c" "x11fns.c")) - - -;;; This produces an inverted a-list in subrs-used. The cdr of each -;;; entry is a list of functions that call the function in car. - -(defun trace-use-tree () - (setq subrs-used (mapcar 'list (mapcar 'car subrs-called))) - (let ((ptr subrs-called) - p2 found) - (while ptr - (setq p2 (car ptr)) - (while (setq p2 (cdr p2)) - (if (setq found (assq (car p2) subrs-used)) - (setcdr found (cons (car (car ptr)) (cdr found))))) - (setq ptr (cdr ptr)))) -) - -;;; find-gc.el ends here |