procyberian/emacs
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

(find-gc-unsafe-list, find-gc-source-directory, find-gc-subrs-used)

Browse source 
(find-gc-noreturn-list, find-gc-source-files):
Vars renamed and defvar'd.
This commit is contained in:
Richard M. Stallman 2005-07-16 17:24:40 +00:00
parent b372cfa997
commit b63ecadb4c
1 changed files with 67 additions and 58 deletions
Download patch file Download diff file Expand all files Collapse all files

125
lisp/emacs-lisp/find-gc.el
View file

@ -23,52 +23,78 @@
;;; 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.
;; Produce in find-gc-unsafe-list the set of all functions that may invoke GC.
;; This expects the Emacs sources to live in find-gc-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))))))
)
(defvar find-gc-unsafe-list nil
"The list of unsafe functions is placed here by `find-gc-unsafe'.")
(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))))))
)
(defvar find-gc-source-directory)
(defvar find-gc-subrs-used nil
"List of subrs used so far in GC testing.")
;;; 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 ))
(defvar find-gc-noreturn-list '(Fsignal Fthrow wrong_type_argument))
;;; 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.
(defvar find-gc-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"
"bytecode.c" "process.c" "callproc.c" "doprnt.c"
"x11term.c" "x11fns.c"))
(defun find-gc-unsafe ()
"Return a list of unsafe functions--that is, which can call GC.
Also store it in `find-gc-unsafe'."
(trace-call-tree nil)
(trace-use-tree)
(find-unsafe-funcs 'Fgarbage_collect)
(setq find-gc-unsafe-list
(sort find-gc-unsafe-list
(function (lambda (x y)
(string-lessp (car x) (car y))))))
)
;;; This does a depth-first search to find all functions that can
;;; ultimately call the function "target". The result is an a-list
;;; in find-gc-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 find-gc-unsafe-list (list (list target)))
(trace-unsafe target)
)
(defun trace-unsafe (func)
(let ((used (assq func find-gc-subrs-used)))
(or used
(error "No find-gc-subrs-used for %s" (car find-gc-unsafe-list)))
(while (setq used (cdr used))
(or (assq (car used) find-gc-unsafe-list)
(memq (car used) find-gc-noreturn-list)
(progn
(push (cons (car used) func) find-gc-unsafe-list)
(trace-unsafe (car used))))))
)
;;; This produces an a-list of functions in subrs-called. The cdr of
@ -83,12 +109,12 @@
(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))))
find-gc-source-directory))))
(save-excursion
(set-buffer (get-buffer-create "*Trace Call Tree*"))
(setq subrs-called nil)
(let ((case-fold-search nil)
(files source-files)
(files find-gc-source-files)
name entry)
(while files
(message "Compiling %s..." (car files))
@ -117,34 +143,17 @@
)
;;; 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"
"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
;;; This produces an inverted a-list in find-gc-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)))
(setq find-gc-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))
(if (setq found (assq (car p2) find-gc-subrs-used))
(setcdr found (cons (car (car ptr)) (cdr found)))))
(setq ptr (cdr ptr))))
)