mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-22 07:09:54 +00:00
152 lines
5.1 KiB
EmacsLisp
152 lines
5.1 KiB
EmacsLisp
;;; 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, 675 Mass Ave, Cambridge, MA 02139, 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
|